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Wu LY, Chai YL, Cheah IK, Chia RSL, Hilal S, Arumugam TV, Chen CP, Lai MKP. Blood-based biomarkers of cerebral small vessel disease. Ageing Res Rev 2024; 95:102247. [PMID: 38417710 DOI: 10.1016/j.arr.2024.102247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 02/12/2024] [Accepted: 02/22/2024] [Indexed: 03/01/2024]
Abstract
Age-associated cerebral small vessel disease (CSVD) represents a clinically heterogenous condition, arising from diverse microvascular mechanisms. These lead to chronic cerebrovascular dysfunction and carry a substantial risk of subsequent stroke and vascular cognitive impairment in aging populations. Owing to advances in neuroimaging, in vivo visualization of cerebral vasculature abnormities and detection of CSVD, including lacunes, microinfarcts, microbleeds and white matter lesions, is now possible, but remains a resource-, skills- and time-intensive approach. As a result, there has been a recent proliferation of blood-based biomarker studies for CSVD aimed at developing accessible screening tools for early detection and risk stratification. However, a good understanding of the pathophysiological processes underpinning CSVD is needed to identify and assess clinically useful biomarkers. Here, we provide an overview of processes associated with CSVD pathogenesis, including endothelial injury and dysfunction, neuroinflammation, oxidative stress, perivascular neuronal damage as well as cardiovascular dysfunction. Then, we review clinical studies of the key biomolecules involved in the aforementioned processes. Lastly, we outline future trends and directions for CSVD biomarker discovery and clinical validation.
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Affiliation(s)
- Liu-Yun Wu
- Memory Aging and Cognition Centre, National University Health System, Singapore; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Yuek Ling Chai
- Memory Aging and Cognition Centre, National University Health System, Singapore; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Irwin K Cheah
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Neurobiology Programme, Centre for Life Sciences, National University of Singapore, Singapore
| | - Rachel S L Chia
- Memory Aging and Cognition Centre, National University Health System, Singapore; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Saima Hilal
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Kent Ridge, Singapore
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea; Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher P Chen
- Memory Aging and Cognition Centre, National University Health System, Singapore; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Mitchell K P Lai
- Memory Aging and Cognition Centre, National University Health System, Singapore; Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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2
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Dinh QN, Lo C, Zhang DW, Tran V, Gibson-Hughes T, Sheriff A, Diep H, Kim HA, Zhang SR, Barreto-Arce LJ, Jelinic M, Vinh A, Arumugam TV, Chan ST, Lim R, Drummond GR, Sobey CG, De Silva TM. Human amnion epithelial cell therapy reduces hypertension-induced vascular stiffening and cognitive impairment. Sci Rep 2024; 14:1837. [PMID: 38246932 PMCID: PMC10800338 DOI: 10.1038/s41598-024-52214-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/16/2024] [Indexed: 01/23/2024] Open
Abstract
Vascular inflammation and fibrosis are hallmarks of hypertension and contribute to the development of cardiovascular disease and cognitive impairment. However, current anti-hypertensive drugs do not treat the underlying tissue damage, such as inflammation-associated fibrosis. Human amnion epithelial cells have several properties amenable for treating vascular pathology. This study tested the effect of amnion epithelial cells on vascular pathology and cognitive impairment during hypertension. Male C57Bl6 mice (8-12 weeks) were administered vehicle (saline; n = 58) or angiotensin II (0.7 mg/kg/d, n = 56) subcutaneously for 14 d. After surgery, a subset of mice were injected with 106 amnion epithelial cells intravenously. Angiotensin II infusion increased systolic blood pressure, aortic pulse wave velocity, accumulation of aortic leukocytes, and aortic mRNA expression of collagen subtypes compared to vehicle-infused mice (n = 9-11, P < 0.05). Administration of amnion epithelial cells attenuated these effects of angiotensin II (P < 0.05). Angiotensin II-induced cognitive impairment was prevented by amnion epithelial cell therapy (n = 7-9, P < 0.05). In the brain, amnion epithelial cells modulated some of the inflammatory genes that angiotensin II promoted differential expression of (n = 6, p-adjusted < 0.05). These findings suggest that amnion epithelial cells could be explored as a potential therapy to inhibit vascular pathology and cognitive impairment during hypertension.
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Affiliation(s)
- Quynh Nhu Dinh
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Cecilia Lo
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - David Wong Zhang
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Vivian Tran
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Tayla Gibson-Hughes
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Ashleigh Sheriff
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Henry Diep
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Hyun Ah Kim
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Shenpeng R Zhang
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Liz J Barreto-Arce
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Maria Jelinic
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Antony Vinh
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Thiruma V Arumugam
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Siow Teng Chan
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Rebecca Lim
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Grant R Drummond
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Christopher G Sobey
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia.
| | - T Michael De Silva
- Department of Microbiology, Anatomy, Physiology and Pharmacology, Centre for Cardiovascular Biology and Disease Research, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, 3086, Australia.
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3
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Anand S, Nedeva C, Chitti SV, Fonseka P, Kang T, Gangoda L, Tabassum NI, Abdirahman S, Arumugam TV, Putoczki TL, Kumar S, Mathivanan S. The E3 ubiquitin ligase NEDD4 regulates chemoresistance to 5-fluorouracil in colorectal cancer cells by altering JNK signalling. Cell Death Dis 2023; 14:828. [PMID: 38097550 PMCID: PMC10721789 DOI: 10.1038/s41419-023-06349-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 11/12/2023] [Accepted: 11/29/2023] [Indexed: 12/17/2023]
Abstract
Colorectal cancer (CRC) is the second leading cause of cancer deaths. Though chemotherapy is the main treatment option for advanced CRC, patients invariably acquire resistance to chemotherapeutic drugs and fail to respond to the therapy. Although understanding the mechanisms regulating chemoresistance has been a focus of intense research to manage this challenge, the pathways governing resistance to drugs are poorly understood. In this study, we provide evidence for the role of ubiquitin ligase NEDD4 in resistance developed against the most commonly used CRC chemotherapeutic drug 5-fluorouracil (5-FU). A marked reduction in NEDD4 protein abundance was observed in a panel of CRC cell lines and patient-derived xenograft samples that were resistant to 5-FU. Knockout of NEDD4 in CRC cells protected them from 5-FU-mediated apoptosis but not oxaliplatin or irinotecan. Furthermore, NEDD4 depletion in CRC cells reduced proliferation, colony-forming abilities and tumour growth in mice. Follow-up biochemical analysis highlighted the inhibition of the JNK signalling pathway in NEDD4-deficient cells. Treatment with the JNK activator hesperidin in NEDD4 knockout cells sensitised the CRC cells against 5-FU. Overall, we show that NEDD4 regulates cell proliferation, colony formation, tumour growth and 5-FU chemoresistance in CRC cells.
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Affiliation(s)
- Sushma Anand
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Christina Nedeva
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Sai V Chitti
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Pamali Fonseka
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Taeyoung Kang
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Lahiru Gangoda
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Nishat I Tabassum
- Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, Centre for Cardiovascular Biology and Disease Research, La Trobe University, Melbourne, Australia
| | - Suad Abdirahman
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, 3052, Australia
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3052, Australia
| | - Thiruma V Arumugam
- Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, Centre for Cardiovascular Biology and Disease Research, La Trobe University, Melbourne, Australia
| | - Tracy L Putoczki
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, 3052, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, VIC, 3052, Australia
| | - Sharad Kumar
- Centre for Cancer Biology, University of South Australia, Adelaide, SA, 5001, Australia
| | - Suresh Mathivanan
- Department of Biochemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
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4
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Chua XY, Torta F, Chong JR, Venketasubramanian N, Hilal S, Wenk MR, Chen CP, Arumugam TV, Herr DR, Lai MKP. Lipidomics profiling reveals distinct patterns of plasma sphingolipid alterations in Alzheimer's disease and vascular dementia. Alzheimers Res Ther 2023; 15:214. [PMID: 38087395 PMCID: PMC10714620 DOI: 10.1186/s13195-023-01359-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) and vascular dementia (VaD) are two of the commonest causes of dementia in the elderly. Of the myriad biomolecules implicated in dementia pathogenesis, sphingolipids have attracted relatively scant research attention despite their known involvement in multiple pathophysiological processes. The potential utility of peripheral sphingolipids as biomarkers in dementia cohorts with high concomitance of cerebrovascular diseases is also unclear. METHODS Using a lipidomics platform, we performed a case-control study of plasma sphingolipids in a prospectively assessed cohort of 526 participants (non-cognitively impaired, NCI = 93, cognitively impaired = 217, AD = 166, VaD = 50) using a lipidomics platform. RESULTS Distinct patterns of sphingolipid alterations were found in AD and VaD, namely an upregulation of d18:1 species in AD compared to downregulation of d16:1 species in VaD. In particular, GM3 d18:1/16:0 and GM3 d18:1/24:1 showed the strongest positive associations with AD. Furthermore, evaluation of sphingolipids panels showed specific combinations with higher sensitivity and specificity for classification of AD (Cer d16:1/24:0. Cer d18:1/16:0, GM3 d16:1/22:0, GM3 d18:1/16:0, SM d16:1/22:0, HexCer d18:1/18:0) and VAD (Cer d16:1/24:0, Cer d18:1/16:0, Hex2Cer d16:1/16:0, HexCer d18:1/18:0, SM d16:1/16:0, SM d16:1/20:0, SM d18:2/22:0) compared to NCI. CONCLUSIONS AD and VaD are associated with distinct changes of plasma sphingolipids, warranting further studies into underlying pathophysiological mechanisms and assessments of their potential utility as dementia biomarkers and therapeutic targets.
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Affiliation(s)
- Xin Ying Chua
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Federico Torta
- Singapore Lipidomics Incubator (SLING), Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | | | - Saima Hilal
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - Markus R Wenk
- Singapore Lipidomics Incubator (SLING), Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Thiruma V Arumugam
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Melbourne, VIC, Australia
| | - Deron R Herr
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Center for Genetic Disorders and Aging Research, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.
- Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore.
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5
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Wong LJ, Lee BWL, Sng YJ, Poh L, Rajeev V, Selvaraji S, Drummond GR, Sobey CG, Arumugam TV, Fann DY. Inflammasome Activation Mediates Apoptotic and Pyroptotic Death in Astrocytes Under Ischemic Conditions. Neuromolecular Med 2023; 25:533-544. [PMID: 37646911 DOI: 10.1007/s12017-023-08753-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 08/20/2023] [Indexed: 09/01/2023]
Abstract
Inflammation is a hallmark mechanism of ischemic stroke-induced brain injury. Recent studies have shown that an intracellular multimeric protein complex known as an inflammasome is a key factor for inducing an inflammatory response, and apoptotic and pyroptotic cell death in ischemic stroke. Inflammasome assembly leads to the activation of pro-inflammatory caspases, and the maturation and secretion of pro-inflammatory cytokines IL-1β and IL-18. While the role of inflammasomes in ischemic stroke-induced neuronal death, and microglial activation and cell death have been established, little is known about the role of inflammasomes in astrocytes under ischemic conditions. In this study, we investigated the expression and activation of inflammasome components in protoplasmic and fibrous astrocytes under ischemic conditions. We found that both protoplasmic and fibrous astrocytes expressed a differential increase in inflammasome protein components, and that their activation promoted maturation of IL-1β and IL-18, and secretion of IL-1β, as well as initiating apoptotic and pyroptotic cell death. Pharmacological inhibition of caspase-1 decreased expression of cleaved caspase-1 and production of mature IL-1β, and protected against inflammasome-mediated apoptotic and pyroptotic cell death. Overall, this study provides novel insights into the role of inflammasome signaling in astrocytes under ischemic conditions.
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Affiliation(s)
- Lap Jack Wong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bernice Woon Li Lee
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yi Jing Sng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia.
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.
| | - David Y Fann
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- Healthy Longevity Translational Research Programme (HLTRP), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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Alexander SPH, Kelly E, Mathie AA, Peters JA, Veale EL, Armstrong JF, Buneman OP, Faccenda E, Harding SD, Spedding M, Cidlowski JA, Fabbro D, Davenport AP, Striessnig J, Davies JA, Ahlers-Dannen KE, Alqinyah M, Arumugam TV, Bodle C, Dagner JB, Chakravarti B, Choudhuri SP, Druey KM, Fisher RA, Gerber KJ, Hepler JR, Hooks SB, Kantheti HS, Karaj B, Layeghi-Ghalehsoukhteh S, Lee JK, Luo Z, Martemyanov K, Mascarenhas LD, McNabb H, Montañez-Miranda C, Ogujiofor O, Phan H, Roman DL, Shaw V, Sjogren B, Sobey C, Spicer MM, Squires KE, Sutton L, Wendimu M, Wilkie T, Xie K, Zhang Q, Zolghadri Y. The Concise Guide to PHARMACOLOGY 2023/24: Introduction and Other Protein Targets. Br J Pharmacol 2023; 180 Suppl 2:S1-S22. [PMID: 38123153 DOI: 10.1111/bph.16176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Abstract
The Concise Guide to PHARMACOLOGY 2023/24 is the sixth in this series of biennial publications. The Concise Guide provides concise overviews, mostly in tabular format, of the key properties of approximately 1800 drug targets, and about 6000 interactions with about 3900 ligands. There is an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. Although the Concise Guide constitutes almost 500 pages, the material presented is substantially reduced compared to information and links presented on the website. It provides a permanent, citable, point-in-time record that will survive database updates. The full contents of this section can be found at http://onlinelibrary.wiley.com/doi/10.1111/bph.16176. In addition to this overview, in which are identified 'Other protein targets' which fall outside of the subsequent categorisation, there are six areas of focus: G protein-coupled receptors, ion channels, nuclear hormone receptors, catalytic receptors, enzymes and transporters. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. The landscape format of the Concise Guide is designed to facilitate comparison of related targets from material contemporary to mid-2023, and supersedes data presented in the 2021/22, 2019/20, 2017/18, 2015/16 and 2013/14 Concise Guides and previous Guides to Receptors and Channels. It is produced in close conjunction with the Nomenclature and Standards Committee of the International Union of Basic and Clinical Pharmacology (NC-IUPHAR), therefore, providing official IUPHAR classification and nomenclature for human drug targets, where appropriate.
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Affiliation(s)
- Stephen P H Alexander
- School of Life Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Eamonn Kelly
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, BS8 1TD, UK
| | - Alistair A Mathie
- School of Allied Health Sciences, University of Suffolk, Ipswich, IP4 1QJ, UK
| | - John A Peters
- Neuroscience Division, Medical Education Institute, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK
| | - Emma L Veale
- Medway School of Pharmacy, The Universities of Greenwich and Kent at Medway, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
| | - Jane F Armstrong
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - O Peter Buneman
- Laboratory for Foundations of Computer Science, School of Informatics, University of Edinburgh, Edinburgh, EH8 9LE, UK
| | - Elena Faccenda
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Simon D Harding
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | | | - John A Cidlowski
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC, 27709, USA
| | | | | | - Jörg Striessnig
- Pharmacology and Toxicology, Institute of Pharmacy, University of Innsbruck, A-6020, Innsbruck, Austria
| | - Jamie A Davies
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Zili Luo
- University of Iowa, Iowa City, USA
| | | | | | | | | | - Osita Ogujiofor
- University of Texas Southwestern Medical Center, Dallas, USA
| | - Hoa Phan
- University of Michigan, East Lansing, USA
| | | | | | | | | | | | | | | | | | - Thomas Wilkie
- University of Texas Southwestern Medical Center, Dallas, USA
| | | | | | - Yalda Zolghadri
- University of Texas Southwestern Medical Center, Dallas, USA
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7
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Arumugam TV, Alli-Shaik A, Liehn EA, Selvaraji S, Poh L, Rajeev V, Cho Y, Cho Y, Kim J, Kim J, Swa HLF, Hao DTZ, Rattanasopa C, Fann DYW, Mayan DC, Ng GYQ, Baik SH, Mallilankaraman K, Gelderblom M, Drummond GR, Sobey CG, Kennedy BK, Singaraja RR, Mattson MP, Jo DG, Gunaratne J. Multiomics analyses reveal dynamic bioenergetic pathways and functional remodeling of the heart during intermittent fasting. eLife 2023; 12:RP89214. [PMID: 37769126 PMCID: PMC10538958 DOI: 10.7554/elife.89214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023] Open
Abstract
Intermittent fasting (IF) has been shown to reduce cardiovascular risk factors in both animals and humans, and can protect the heart against ischemic injury in models of myocardial infarction. However, the underlying molecular mechanisms behind these effects remain unclear. To shed light on the molecular and cellular adaptations of the heart to IF, we conducted comprehensive system-wide analyses of the proteome, phosphoproteome, and transcriptome, followed by functional analysis. Using advanced mass spectrometry, we profiled the proteome and phosphoproteome of heart tissues obtained from mice that were maintained on daily 12- or 16 hr fasting, every-other-day fasting, or ad libitum control feeding regimens for 6 months. We also performed RNA sequencing to evaluate whether the observed molecular responses to IF occur at the transcriptional or post-transcriptional levels. Our analyses revealed that IF significantly affected pathways that regulate cyclic GMP signaling, lipid and amino acid metabolism, cell adhesion, cell death, and inflammation. Furthermore, we found that the impact of IF on different metabolic processes varied depending on the length of the fasting regimen. Short IF regimens showed a higher correlation of pathway alteration, while longer IF regimens had an inverse correlation of metabolic processes such as fatty acid oxidation and immune processes. Additionally, functional echocardiographic analyses demonstrated that IF enhances stress-induced cardiac performance. Our systematic multi-omics study provides a molecular framework for understanding how IF impacts the heart's function and its vulnerability to injury and disease.
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Affiliation(s)
- Thiruma V Arumugam
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Asfa Alli-Shaik
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
| | - Elisa A Liehn
- National Heart Research Institute, National Heart Centre SingaporeSingaporeSingapore
- Institute for Molecular Medicine, University of Southern DenmarkOdenseDenmark
- National Institute of Pathology "Victor Babes"BucharestRomania
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of SingaporeSingaporeSingapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Yoonsuk Cho
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Yongeun Cho
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Jongho Kim
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Joonki Kim
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- Natural Products Research Center, Korea Institute of Science and TechnologyGangneungRepublic of Korea
| | - Hannah LF Swa
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
| | - David Tan Zhi Hao
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Chutima Rattanasopa
- Translational Laboratories in Genetic Medicine, Agency for Science, Technology and ResearchSingaporeSingapore
- Cardiovascular and Metabolic Disorders Program, Duke-National University of SingaporeSingaporeSingapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - David Castano Mayan
- Translational Laboratories in Genetic Medicine, Agency for Science, Technology and ResearchSingaporeSingapore
| | - Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Mathias Gelderblom
- Department of Neurology, University Medical Center Hamburg-EppendorfHamburgGermany
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe UniversityMelbourneAustralia
| | - Brian K Kennedy
- Department of Physiology, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
- Department of Biochemistry, Yong Loo Lin School Medicine, National University of SingaporeSingaporeSingapore
| | - Roshni R Singaraja
- Department of Medicine, Yong Loo Lin School of Medicine, National University of SingaporeSingaporeSingapore
| | - Mark P Mattson
- Department of Neuroscience, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan UniversitySuwonRepublic of Korea
| | - Jayantha Gunaratne
- Translational Biomedical Proteomics Laboratory, Institute of Molecular and Cell Biology, Agency for Science, Technology and ResearchSingaporeSingapore
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of SingaporeSingaporeSingapore
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8
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Wong LJ, Lee BWL, Sng YJ, Poh L, Rajeev V, Selvaraji S, Drummond GR, Sobey CG, Arumugam TV, Fann DY. Author Correction: Inflammasome Activation Mediates Apoptotic and Pyroptotic Death in Astrocytes Under Ischemic Conditions. Neuromolecular Med 2023:10.1007/s12017-023-08760-3. [PMID: 37733179 DOI: 10.1007/s12017-023-08760-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Affiliation(s)
- Lap Jack Wong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bernice Woon Li Lee
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yi Jing Sng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- Centre for Cardiovascular Biology and Disease Research and Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia.
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.
| | - David Y Fann
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- Healthy Longevity Translational Research Programme (HLTRP), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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9
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Rajeev V, Chai YL, Poh L, Selvaraji S, Fann DY, Jo DG, De Silva TM, Drummond GR, Sobey CG, Arumugam TV, Chen CP, Lai MKP. Chronic cerebral hypoperfusion: a critical feature in unravelling the etiology of vascular cognitive impairment. Acta Neuropathol Commun 2023; 11:93. [PMID: 37309012 DOI: 10.1186/s40478-023-01590-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/14/2023] Open
Abstract
Vascular cognitive impairment (VCI) describes a wide spectrum of cognitive deficits related to cerebrovascular diseases. Although the loss of blood flow to cortical regions critically involved in cognitive processes must feature as the main driver of VCI, the underlying mechanisms and interactions with related disease processes remain to be fully elucidated. Recent clinical studies of cerebral blood flow measurements have supported the role of chronic cerebral hypoperfusion (CCH) as a major driver of the vascular pathology and clinical manifestations of VCI. Here we review the pathophysiological mechanisms as well as neuropathological changes of CCH. Potential interventional strategies for VCI are also reviewed. A deeper understanding of how CCH can lead to accumulation of VCI-associated pathology could potentially pave the way for early detection and development of disease-modifying therapies, thus allowing preventive interventions instead of symptomatic treatments.
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Affiliation(s)
- Vismitha Rajeev
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Luting Poh
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Sharmelee Selvaraji
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
- Integrative Sciences and Engineering Programme, NUS Graduate School, National University of Singapore, Singapore, Singapore
| | - David Y Fann
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - T Michael De Silva
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Grant R Drummond
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Christopher G Sobey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- Memory Aging and Cognition Centre, National University Health System, Singapore, Singapore.
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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10
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Chai YL, Lee JH, Chong JR, Ballard C, Francis PT, Kennedy BK, Arumugam TV, Chen CP, Aarsland D, Lai MKP. Inflammatory panel cytokines are elevated in the neocortex of late-stage Alzheimer's disease but not Lewy body dementias. J Neuroinflammation 2023; 20:111. [PMID: 37158957 PMCID: PMC10169342 DOI: 10.1186/s12974-023-02789-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/24/2023] [Indexed: 05/10/2023] Open
Abstract
BACKGROUND Chronically dysregulated neuroinflammation has been implicated in neurodegenerative dementias, with separate studies reporting increased brain levels of inflammatory mediators and gliosis in Alzheimer's disease (AD) as well as in Lewy body dementias (LBD). However, it is unclear whether the nature and extent of neuroinflammatory responses in LBD are comparable to those in AD. In this study, we performed head-to-head measurements of a panel of cytokines in the post-mortem neocortex of AD versus the two major clinical subtypes of LBD, namely, dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD). METHODS Post-mortem tissues from the mid-temporal cortex (Brodmann area 21) of a cohort of neuropathologically well-defined AD, PDD and DLB patients were processed and measured for a comprehensive range of cytokines (IL-1α, IL-1Ra, IL-8, IL-10, IL-12p70, IL-13, IFN-γ, GM-CSF and FGF-2) using a multiplex immunoassay platform. Associations between inflammation markers and neuropathological measures of neuritic plaques, neurofibrillary tangles as well as Lewy bodies were also performed. RESULTS We found IL-1α, IFN-γ, GM-CSF and IL-13 to be elevated in the mid-temporal cortex of AD patients. In contrast, none of the measured cytokines were significantly altered in either DLB or PDD. Similar cytokine changes were observed in two other neocortical areas of AD patients. Furthermore, increases of IL-1α, IFN-γ, GM-CSF, IL-10 and IL-13 associated with moderate-to-severe neurofibrillary tangle burden, but not with neuritic plaques or Lewy bodies. Our findings of elevated neocortical pro- and anti-inflammatory cytokines in AD, but not in DLB or PDD, suggest that neuroinflammatory responses are strongly linked to neurofibrillary tangle burden, which is higher in AD compared to LBD. In conclusion, neuroinflammation may not play a prominent role in the pathophysiology of late-stage LBD.
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Affiliation(s)
- Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
| | - Jasinda H Lee
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Clive Ballard
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- University of Exeter Medical School, Exeter, UK
| | | | - Brian K Kennedy
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Dag Aarsland
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore.
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- University of Exeter Medical School, Exeter, UK.
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11
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Chai YL, Rajeev V, Poh L, Selvaraji S, Hilal S, Chen CP, Jo DG, Koo EH, Arumugam TV, Lai MKP. Chronic cerebral hypoperfusion alters the CypA-EMMPRIN-gelatinase pathway: Implications for vascular dementia. J Cereb Blood Flow Metab 2023; 43:722-735. [PMID: 36537035 PMCID: PMC10108186 DOI: 10.1177/0271678x221146401] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 11/17/2022] [Accepted: 11/17/2022] [Indexed: 03/21/2023]
Abstract
Chronic cerebral hypoperfusion (CCH) is postulated to underlie multiple pathophysiological processes in vascular dementia (VaD), including extracellular matrix dysfunction. While several extracellular matrix proteins, namely cyclophilin A (CypA), extracellular matrix metalloproteinase inducer (EMMPRIN) and gelatinases (matrix metalloproteinases, MMP-2 and -9) have been investigated in acute stroke, their involvement in CCH and VaD remains unclear. In this study, CypA-EMMPRIN-gelatinase proteins were analysed in a clinical cohort of 36 aged, cognitively unimpaired subjects and 48 VaD patients, as well as in a bilateral carotid artery stenosis mouse model of CCH. Lower CypA and higher EMMPRIN levels were found in both VaD serum and CCH mouse brain. Furthermore, gelatinases were differentially altered in CCH mice and VaD patients, with significant MMP-2 increase in CCH brain and serum, whilst serum MMP-9 was elevated in VaD but reduced in CCH, suggesting complex CypA-EMMPRIN-gelatinase regulatory mechanisms. Interestingly, subjects with cortical infarcts had higher serum MMP-2, while white matter hyperintensities, cortical infarcts and lacunes were associated with higher serum MMP-9. Taken together, our data indicate that perturbations of CypA-EMMPRIN signalling may be associated with gelatinase-mediated vascular sequelae, highlighting the potential utility of the CypA-EMMPRIN-gelatinase pathway as clinical biomarkers and therapeutic targets in VaD.
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Affiliation(s)
- Yuek Ling Chai
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
- Memory, Aging and Cognition Centre,
National University Health System, Kent Ridge, Singapore
| | - Vismitha Rajeev
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
| | - Luting Poh
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
| | - Sharmelee Selvaraji
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
| | - Saima Hilal
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
- Saw Swee Hock School of Public
Health, National University of Singapore, Kent Ridge, Singapore
| | - Christopher P Chen
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
- Memory, Aging and Cognition Centre,
National University Health System, Kent Ridge, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan
University, Suwon, Republic of Korea
| | - Edward H Koo
- Department of Medicine, National
University of Singapore, Kent Ridge, Singapore
- Graduate School for Integrative
Sciences and Engineering, National University of Singapore, Kent Ridge,
Singapore
- Department of Neurosciences,
University of California San Diego, San Diego, CA, USA
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan
University, Suwon, Republic of Korea
- Centre for Cardiovascular Biology
and Disease Research, Department of Microbiology, Anatomy, Physiology and
Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe
University, Bundoora, VIC, Australia
| | - Mitchell KP Lai
- Department of Pharmacology, Yong
Loo Lin School of Medicine, National University of Singapore, Kent Ridge,
Singapore
- Memory, Aging and Cognition Centre,
National University Health System, Kent Ridge, Singapore
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12
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Gelderblom M, Koch S, Strecker JK, Jørgensen C, Garcia-Bonilla L, Ludewig P, Schädlich IS, Piepke M, Degenhardt K, Bernreuther C, Pinnschmidt H, Arumugam TV, Thomalla G, Faber C, Sedlacik J, Gerloff C, Minnerup J, Clausen BH, Anrather J, Magnus T. A preclinical randomized controlled multi-centre trial of anti-interleukin-17A treatment for acute ischaemic stroke. Brain Commun 2023; 5:fcad090. [PMID: 37056478 PMCID: PMC10088471 DOI: 10.1093/braincomms/fcad090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/19/2023] [Accepted: 03/22/2023] [Indexed: 04/15/2023] Open
Abstract
Multiple consensus statements have called for preclinical randomized controlled trials to improve translation in stroke research. We investigated the efficacy of an interleukin-17A neutralizing antibody in a multi-centre preclinical randomized controlled trial using a murine ischaemia reperfusion stroke model. Twelve-week-old male C57BL/6 mice were subjected to 45 min of transient middle cerebral artery occlusion in four centres. Mice were randomly assigned (1:1) to receive either an anti-interleukin-17A (500 µg) or isotype antibody (500 µg) intravenously 1 h after reperfusion. The primary endpoint was infarct volume measured by magnetic resonance imaging three days after transient middle cerebral artery occlusion. Secondary analysis included mortality, neurological score, neutrophil infiltration and the impact of the gut microbiome on treatment effects. Out of 136 mice, 109 mice were included in the analysis of the primary endpoint. Mixed model analysis revealed that interleukin-17A neutralization significantly reduced infarct sizes (anti-interleukin-17A: 61.77 ± 31.04 mm3; IgG control: 75.66 ± 34.79 mm3; P = 0.01). Secondary outcome measures showed a decrease in mortality (hazard ratio = 3.43, 95% confidence interval = 1.157-10.18; P = 0.04) and neutrophil invasion into ischaemic cortices (anti-interleukin-17A: 7222 ± 6108 cells; IgG control: 28 153 ± 23 206 cells; P < 0.01). There was no difference in Bederson score. The analysis of the gut microbiome showed significant heterogeneity between centres (R = 0.78, P < 0.001, n = 40). Taken together, neutralization of interleukin-17A in a therapeutic time window resulted in a significant reduction of infarct sizes and mortality compared with isotype control. It suggests interleukin-17A neutralization as a potential therapeutic target in stroke.
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Affiliation(s)
- Mathias Gelderblom
- Correspondence to: Mathias Gelderblom Department of Neurology University Medical Center Hamburg-Eppendorf Martinistrasse 52, 20246 Hamburg, Germany E-mail:
| | | | - Jan-Kolja Strecker
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149 Münster, Germany
| | - Carina Jørgensen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Lidia Garcia-Bonilla
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Peter Ludewig
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Ines Sophie Schädlich
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Marius Piepke
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Karoline Degenhardt
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Christian Bernreuther
- Department of Neuropathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Hans Pinnschmidt
- Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Thiruma V Arumugam
- Department of Physiology, Anatomy & Microbiology School of Life Sciences, La Trobe University, Melbourne 3086, Australia
| | - Götz Thomalla
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Cornelius Faber
- Translational Research Imaging Center, Clinic of Radiology, University of Münster, 48149 Münster, Germany
| | - Jan Sedlacik
- Department of Biomedical Engineering, Centre for the Developing Brain, School of Biomedical Engineering & Imaging Sciences, King's College London, London WC2R 2LS, UK
| | - Christian Gerloff
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Jens Minnerup
- Department of Neurology with Institute of Translational Neurology, University of Münster, 48149 Münster, Germany
| | - Bettina H Clausen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, 5000 Odense, Denmark
| | - Josef Anrather
- Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY 10065, USA
| | - Tim Magnus
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
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13
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Cho Y, Bae HG, Okun E, Arumugam TV, Jo DG. Corrigendum to “Physiology and pharmacology of amyloid precursor protein” [Pharmacology & Therapeutics Volume 235(2022) 108122. Pharmacol Ther 2022; 238:108281. [DOI: 10.1016/j.pharmthera.2022.108281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Cho Y, Bae HG, Okun E, Arumugam TV, Jo DG. Physiology and pharmacology of amyloid precursor protein. Pharmacol Ther 2022; 235:108122. [PMID: 35114285 DOI: 10.1016/j.pharmthera.2022.108122] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 01/17/2022] [Accepted: 01/25/2022] [Indexed: 02/06/2023]
Abstract
Amyloid precursor protein (APP) is an evolutionarily conserved transmembrane protein and a well-characterized precursor protein of amyloid-beta (Aβ) peptides, which accumulate in the brains of individuals with Alzheimer's disease (AD)-related pathologies. Aβ has been extensively investigated since the amyloid hypothesis in AD was proposed. Besides Aβ, previous studies on APP and its proteolytic cleavage products have suggested their diverse pathological and physiological functions. However, their roles still have not been thoroughly understood. In this review, we extensively discuss the evolutionarily-conserved biology of APP, including its structure and processing pathway, as well as recent findings on the physiological roles of APP and its fragments in the central nervous system and peripheral nervous system. We have also elaborated upon the current status of APP-targeted therapeutic approaches for AD treatment by discussing inhibitors of several proteases participating in APP processing, including α-, β-, and γ-secretases. Finally, we have highlighted the future perspectives pertaining to further research and the potential clinical role of APP.
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Affiliation(s)
- Yoonsuk Cho
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea
| | - Han-Gyu Bae
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea
| | - Eitan Okun
- The Leslie and Susan Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat Gan 5290002, Israel; The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 5290002, Israel; The Pauld Feder Laboratory on Alzheimer's Disease Research, Israel
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea; School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia.
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, South Korea; Samsung Advanced Institute for Health Sciences and Technology, Sungkyunkwan University, Seoul 06351, South Korea; Biomedical Institute for Convergence, Sungkyunkwan University, Suwon 16419, South Korea.
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15
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Ng GYQ, Hande V, Ong MH, Wong BWX, Loh ZWL, Ho WD, Handison LB, Tan IMSP, Fann DY, Arumugam TV, Hande MP. Effects of dietary interventions on telomere dynamics. Mutat Res Genet Toxicol Environ Mutagen 2022; 876-877:503472. [PMID: 35483787 DOI: 10.1016/j.mrgentox.2022.503472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/04/2022] [Accepted: 02/05/2022] [Indexed: 06/14/2023]
Abstract
Telomeres play a critical role in maintaining cellular fate through tight regulation of cell division and DNA damage or repair. Over the years, it is established that biological ageing is defined by a gradual derangement in functionality, productivity, and robustness of biological processes. The link between telomeres and ageing is highlighted when derangement in telomere biology often leads to premature ageing and concomitant accompaniment of numerous age-associated diseases. Unfortunately, given that ageing is a biologically complicated intricacy, measures to reduce morbidity and improve longevity are still largely in the infancy stage. Recently, it was discovered that dietary habits and interventions might play a role in promoting successful healthy ageing. The intricate relationship between dietary components and its potential to protect the integrity of telomeres may provide unprecedented health benefits and protection against age-related pathologies. However, more focused prospective and follow-up studies with and without interventions are needed to unequivocally link dietary interventions with telomere maintenance in humans. This review aims to summarise recent findings that investigate the roles of nutrition on telomere biology and provide enough evidence for further studies to consider the topic of nutrigenomics and its contributions toward healthy ageing and concomitant strategy against age-associated diseases.
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Affiliation(s)
- Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Varsha Hande
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Min Hui Ong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Beverly Wen-Xin Wong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zachary Wai-Loon Loh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wei D Ho
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Lionel B Handison
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | - David Y Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, National University Health System (NUHS), Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea; Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, VIC, Australia
| | - M Prakash Hande
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Vellore Institute of Technology, Vellore, India; Mangalore University, Mangalore, India.
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16
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Ng GYQ, Sheng DPLK, Bae HG, Kang SW, Fann DYW, Park J, Kim J, Alli-Shaik A, Lee J, Kim E, Park S, Han JW, Karamyan V, Okun E, Dheen T, Hande MP, Vemuganti R, Mallilankaraman K, Lim LHK, Kennedy BK, Drummond GR, Sobey CG, Gunaratne J, Mattson MP, Foo RSY, Jo DG, Arumugam TV. Integrative epigenomic and transcriptomic analyses reveal metabolic switching by intermittent fasting in brain. GeroScience 2022; 44:2171-2194. [PMID: 35357643 DOI: 10.1007/s11357-022-00537-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/21/2022] [Indexed: 11/04/2022] Open
Abstract
Intermittent fasting (IF) remains the most effective intervention to achieve robust anti-aging effects and attenuation of age-related diseases in various species. Epigenetic modifications mediate the biological effects of several environmental factors on gene expression; however, no information is available on the effects of IF on the epigenome. Here, we first found that IF for 3 months caused modulation of H3K9 trimethylation (H3K9me3) in the cerebellum, which in turn orchestrated a plethora of transcriptomic changes involved in robust metabolic switching processes commonly observed during IF. Second, a portion of both the epigenomic and transcriptomic modulations induced by IF was remarkably preserved for at least 3 months post-IF refeeding, indicating that memory of IF-induced epigenetic changes was maintained. Notably, though, we found that termination of IF resulted in a loss of H3K9me3 regulation of the transcriptome. Collectively, our study characterizes the novel effects of IF on the epigenetic-transcriptomic axis, which controls myriad metabolic processes. The comprehensive analyses undertaken in this study reveal a molecular framework for understanding how IF impacts the metabolo-epigenetic axis of the brain and will serve as a valuable resource for future research.
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Affiliation(s)
- Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | | | - Han-Gyu Bae
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Sung Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jinsu Park
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Joonki Kim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea
| | - Asfa Alli-Shaik
- Translational Biomedical Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Jeongmi Lee
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Eunae Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Sunyoung Park
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Jeung-Whan Han
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Vardan Karamyan
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Science Center, Amarillo, TX, USA
| | - Eitan Okun
- The Leslie and Susan Gonda Multidisciplinary Brain Research Center, Bar-IIan University, Ramat Gan, Israel
| | - Thameem Dheen
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Manoor Prakash Hande
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lina H K Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Brian K Kennedy
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Biochemistry, Yong Loo Lin School Medicine, National University of Singapore, Singapore, Singapore.,Buck Institute for Research On Aging, Novato, USA
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Jayantha Gunaratne
- Translational Biomedical Proteomics Group, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore.,Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mark P Mattson
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Roger Sik-Yin Foo
- Genome Institute of Singapore, Singapore, Singapore. .,Centre for Translational Medicine, Cardiovascular Research Institute, National University Health Systems, National University of Singapore, Singapore, Singapore.
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea. .,Centre for Cardiovascular Biology and Disease Research, Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia.
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Poh L, Sim WL, Jo DG, Dinh QN, Drummond GR, Sobey CG, Chen CLH, Lai MKP, Fann DY, Arumugam TV. The role of inflammasomes in vascular cognitive impairment. Mol Neurodegener 2022; 17:4. [PMID: 35000611 PMCID: PMC8744307 DOI: 10.1186/s13024-021-00506-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 12/02/2021] [Indexed: 12/11/2022] Open
Abstract
There is an increasing prevalence of Vascular Cognitive Impairment (VCI) worldwide, and several studies have suggested that Chronic Cerebral Hypoperfusion (CCH) plays a critical role in disease onset and progression. However, there is a limited understanding of the underlying pathophysiology of VCI, especially in relation to CCH. Neuroinflammation is a significant contributor in the progression of VCI as increased systemic levels of the proinflammatory cytokine interleukin-1β (IL-1β) has been extensively reported in VCI patients. Recently it has been established that CCH can activate the inflammasome signaling pathways, involving NLRP3 and AIM2 inflammasomes that critically regulate IL-1β production. Given that neuroinflammation is an early event in VCI, it is important that we understand its molecular and cellular mechanisms to enable development of disease-modifying treatments to reduce the structural brain damage and cognitive deficits that are observed clinically in the elderly. Hence, this review aims to provide a comprehensive insight into the molecular and cellular mechanisms involved in the pathogenesis of CCH-induced inflammasome signaling in VCI.
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Affiliation(s)
- Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Wei Liang Sim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Quynh Nhu Dinh
- Centre for Cardiovascular Biology and Disease Research, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC Australia
| | - Grant R. Drummond
- Centre for Cardiovascular Biology and Disease Research, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC Australia
| | - Christopher G. Sobey
- Centre for Cardiovascular Biology and Disease Research, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC Australia
| | - Christopher Li-Hsian Chen
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mitchell K. P. Lai
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - David Y. Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Centre for Healthy Longevity, National University Health System (NUHS), Singapore, Singapore
| | - Thiruma V. Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Centre for Cardiovascular Biology and Disease Research, Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC Australia
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Rajeev V, Fann DY, Dinh QN, Kim HA, De Silva TM, Jo DG, Drummond GR, Sobey CG, Lai MK, Chen CLH, Arumugam TV. Intermittent Fasting Attenuates Hallmark Vascular and Neuronal Pathologies in a Mouse Model of Vascular Cognitive Impairment. Int J Biol Sci 2022; 18:6052-6067. [DOI: 10.7150/ijbs.75188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/02/2022] [Indexed: 11/05/2022] Open
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19
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Rajeev V, Fann DY, Dinh QN, Kim HA, De Silva TM, Lai MK, Chen CLH, Drummond GR, Sobey CG, Arumugam TV. Pathophysiology of blood brain barrier dysfunction during chronic cerebral hypoperfusion in vascular cognitive impairment. Am J Cancer Res 2022; 12:1639-1658. [PMID: 35198062 PMCID: PMC8825579 DOI: 10.7150/thno.68304] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/03/2022] [Indexed: 12/05/2022] Open
Abstract
The prevalence of cerebrovascular disease increases with age, placing the elderly at a greater lifetime risk for dementia. Vascular cognitive impairment (VCI) encompasses a spectrum of cognitive deficits from mild cognitive impairment to dementia. VCI and its most severe form, vascular dementia (VaD), is becoming a major public health concern worldwide. As growing efforts are being taken to understand VCI and VaD in animal models and humans, the pathogenesis of the disease is being actively explored. It is postulated that chronic cerebral hypoperfusion (CCH) is a major cause of VCI. CCH activates a molecular and cellular injury cascade that leads to breakdown of the blood brain barrier (BBB) and neurodegeneration. The BBB tightly regulates the movement of substances between the blood and the brain, thereby regulating the microenvironment within the brain parenchyma. Here we illustrate how BBB damage is causal in the pathogenesis of VCI through the increased activation of pathways related to excitotoxicity, oxidative stress, inflammation and matrix metalloproteinases that lead to downstream perivascular damage, leukocyte infiltration and white matter changes in the brain. Thus, CCH-induced BBB damage may initiate and contribute to a vicious cycle, resulting in progressive neuropathological changes of VCI in the brain. This review outlines the molecular and cellular mechanisms that govern BBB breakdown during CCH and highlights the clinical evidence in identifying at-risk VCI patients.
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20
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Selvaraji S, Efthymios M, Foo RSY, Fann DY, Lai MKP, Chen CLH, Lim KL, Arumugam TV. Time-restricted feeding modulates the DNA methylation landscape, attenuates hallmark neuropathology and cognitive impairment in a mouse model of vascular dementia. Am J Cancer Res 2022; 12:3007-3023. [PMID: 35547760 PMCID: PMC9065201 DOI: 10.7150/thno.71815] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 03/05/2022] [Indexed: 11/05/2022] Open
Abstract
Objective: Vascular dementia (VaD) is the second most common cause of dementia worldwide. The increasing contribution of lifestyle-associated risk factors to VaD has pointed towards gene-environment interactions (i.e. epigenetics). This study thus aims to investigate the DNA methylation landscape in a chronic cerebral hypoperfusion (CCH) mouse model of VaD. As a nexus between the gene-environment interaction, intermittent fasting (IF) was introduced as a prophylactic intervention. Methods: Bilateral common carotid artery stenosis (BCAS) was used to induce CCH by placing micro-coils of 0.18 mm in each common carotid artery of the mice. The coils were left in the mice for 7, 15 and 30 days to study temporal differences. IF was introduced for 16 h daily for 4 months prior to BCAS. Reduced Representation Bisulfite Sequencing (RRBS) was used to study the DNA methylation landscape. Cognitive impairment was measured using Barnes Maze Test. White matter lesions (WML) and neuronal loss were measured using Luxol fast blue staining and cresyl violet staining respectively. Results: IF mice subjected to CCH displayed significantly better cognitive learning ability and memory, improved neuropathological alterations with reduced WMLs and neuronal loss. Modulation of DNA methylation patterns in the cortex of AL CCH mice was re-modelled and signs of reversal was observed in IF CCH mice across all three timepoints. Conclusions: These findings provide an understanding of how IF may protect the brain against damage caused by CCH and show promise in offering potential beneficial effects in mitigating the neuropathology and cognitive deficits in VaD.
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21
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Thomas JM, Ling YH, Huuskes B, Jelinic M, Sharma P, Saini N, Ferens DM, Diep H, Krishnan SM, Kemp-Harper BK, O'Connor PM, Latz E, Arumugam TV, Guzik TJ, Hickey MJ, Mansell A, Sobey CG, Vinh A, Drummond GR. IL-18 (Interleukin-18) Produced by Renal Tubular Epithelial Cells Promotes Renal Inflammation and Injury During Deoxycorticosterone/Salt-Induced Hypertension in Mice. Hypertension 2021; 78:1296-1309. [PMID: 34488433 DOI: 10.1161/hypertensionaha.120.16437] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
IL-18 (interleukin-18) is elevated in hypertensive patients, but its contribution to high blood pressure and end-organ damage is unknown. We examined the role of IL-18 in the development of renal inflammation and injury in a mouse model of low-renin hypertension. Hypertension was induced in male C57BL6/J (WT) and IL-18−/− mice by uninephrectomy, deoxycorticosterone acetate (2.4 mg/d, s.c.) and 0.9% drinking saline (1K/DOCA/salt). Normotensive controls received uninephrectomy and placebo (1K/placebo). Blood pressure was measured via tail cuff or radiotelemetry. After 21 days, kidneys were harvested for (immuno)histochemical, quantitative-PCR and flow cytometric analyses of fibrosis, inflammation, and immune cell infiltration. 1K/DOCA/salt-treated WT mice developed hypertension, renal fibrosis, upregulation of proinflammatory genes, and accumulation of CD3+ T cells in the kidneys. They also displayed increased expression of IL-18 on tubular epithelial cells. IL-18−/− mice were profoundly protected from hypertension, renal fibrosis, and inflammation. Bone marrow transplantation between WT and IL-18−/− mice revealed that IL-18-deficiency in non-bone marrow-derived cells alone afforded equivalent protection against hypertension and renal injury as global IL-18 deficiency. IL-18 receptor subunits—interleukin-18 receptor 1 and IL-18R accessory protein—were upregulated in kidneys of 1K/DOCA/salt-treated WT mice and localized to T cells and tubular epithelial cells. T cells from kidneys of 1K/DOCA/salt-treated mice produced interferon-γ upon ex vivo stimulation with IL-18, whereas those from 1K/placebo mice did not. In conclusion, IL-18 production by tubular epithelial cells contributes to elevated blood pressure, renal inflammation, and fibrosis in 1K/DOCA/salt-treated mice, highlighting it as a promising therapeutic target for hypertension and kidney disease.
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Affiliation(s)
- Jordyn M Thomas
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Yeong H Ling
- Department of Pharmacology, Biomedicine Discovery Institute, Cardiovascular Disease Program, Monash University, Clayton, Australia (Y.H.L., D.M.F., S.M.K., B.K.K.-H.)
| | - Brooke Huuskes
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Maria Jelinic
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Prerna Sharma
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Narbada Saini
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Dorota M Ferens
- Department of Pharmacology, Biomedicine Discovery Institute, Cardiovascular Disease Program, Monash University, Clayton, Australia (Y.H.L., D.M.F., S.M.K., B.K.K.-H.)
| | - Henry Diep
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Shalini M Krishnan
- Department of Pharmacology, Biomedicine Discovery Institute, Cardiovascular Disease Program, Monash University, Clayton, Australia (Y.H.L., D.M.F., S.M.K., B.K.K.-H.)
| | - Barbara K Kemp-Harper
- Department of Pharmacology, Biomedicine Discovery Institute, Cardiovascular Disease Program, Monash University, Clayton, Australia (Y.H.L., D.M.F., S.M.K., B.K.K.-H.)
| | - Paul M O'Connor
- Department of Physiology, Medical College of Georgia, Augusta University (P.M.O.)
| | - Eicke Latz
- Institute of Innate Immunity, University Hospital, University of Bonn, Germany (E.L.)
- German Center for Neurodegenerative Diseases, Bonn, Germany (E.L.)
| | - Thiruma V Arumugam
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Tomasz J Guzik
- Department of Medicine, Jagiellonian University, Collegium Medicum, Krakow, Poland (T.J.G.)
- BHF Centre of Research Excellence, Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom (T.J.G.)
| | - Michael J Hickey
- Department of Medicine, Centre for Inflammatory Diseases, Monash University, Clayton, Australia (M.J.H.)
| | - Ashley Mansell
- Hudson Institute of Medical Research, Clayton, Australia (A.M.)
| | - Christopher G Sobey
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
- Baker Heart and Diabetes Institute, Prahran, Australia (C.G.S., G.R.D.)
| | - Antony Vinh
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
| | - Grant R Drummond
- Centre for Cardiovascular Biology and Disease Research and Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, Australia (J.M.T., B.M.H., M.J., P.S., N.S., H.D., T.V.A., C.G.S., A.V., G.R.D.)
- Baker Heart and Diabetes Institute, Prahran, Australia (C.G.S., G.R.D.)
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Alexander SP, Kelly E, Mathie A, Peters JA, Veale EL, Armstrong JF, Faccenda E, Harding SD, Pawson AJ, Southan C, Buneman OP, Cidlowski JA, Christopoulos A, Davenport AP, Fabbro D, Spedding M, Striessnig J, Davies JA, Ahlers-Dannen KE, Alqinyah M, Arumugam TV, Bodle C, Dagner JB, Chakravarti B, Choudhuri SP, Druey KM, Fisher RA, Gerber KJ, Hepler JR, Hooks SB, Kantheti HS, Karaj B, Layeghi-Ghalehsoukhteh S, Lee JK, Luo Z, Martemyanov K, Mascarenhas LD, McNabb H, Montañez-Miranda C, Ogujiofor O, Phan H, Roman DL, Shaw V, Sjogren B, Sobey C, Spicer MM, Squires KE, Sutton L, Wendimu M, Wilkie T, Xie K, Zhang Q, Zolghadri Y. THE CONCISE GUIDE TO PHARMACOLOGY 2021/22: Introduction and Other Protein Targets. Br J Pharmacol 2021; 178 Suppl 1:S1-S26. [PMID: 34529830 PMCID: PMC9513948 DOI: 10.1111/bph.15537] [Citation(s) in RCA: 156] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
The Concise Guide to PHARMACOLOGY 2021/22 is the fifth in this series of biennial publications. The Concise Guide provides concise overviews, mostly in tabular format, of the key properties of nearly 1900 human drug targets with an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. Although the Concise Guide constitutes over 500 pages, the material presented is substantially reduced compared to information and links presented on the website. It provides a permanent, citable, point‐in‐time record that will survive database updates. The full contents of this section can be found at http://onlinelibrary.wiley.com/doi/bph.15537. In addition to this overview, in which are identified ‘Other protein targets’ which fall outside of the subsequent categorisation, there are six areas of focus: G protein‐coupled receptors, ion channels, nuclear hormone receptors, catalytic receptors, enzymes and transporters. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. The landscape format of the Concise Guide is designed to facilitate comparison of related targets from material contemporary to mid‐2021, and supersedes data presented in the 2019/20, 2017/18, 2015/16 and 2013/14 Concise Guides and previous Guides to Receptors and Channels. It is produced in close conjunction with the Nomenclature and Standards Committee of the International Union of Basic and Clinical Pharmacology (NC‐IUPHAR), therefore, providing official IUPHAR classification and nomenclature for human drug targets, where appropriate.
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Affiliation(s)
- Stephen Ph Alexander
- School of Life Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK
| | - Eamonn Kelly
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, BS8 1TD, UK
| | - Alistair Mathie
- School of Engineering, Arts, Science and Technology, University of Suffolk, Ipswich, IP4 1QJ, UK
| | - John A Peters
- Neuroscience Division, Medical Education Institute, Ninewells Hospital and Medical SchoolUniversity of Dundee, Dundee, DD1 9SY, UK
| | - Emma L Veale
- Medway School of Pharmacy, The Universities of Greenwich and Kent at Medway, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
| | - Jane F Armstrong
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Elena Faccenda
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Simon D Harding
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Adam J Pawson
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Christopher Southan
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - O Peter Buneman
- Laboratory for Foundations of Computer Science, School of InformaticsUniversity of Edinburgh, Edinburgh, EH8 9LE, UK
| | - John A Cidlowski
- National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC, 27709, USA
| | - Arthur Christopoulos
- Monash Institute of Pharmaceutical oxPharmaceutical Sciences and Department of Pharmacology, Monash University, Parkville, Victoria, 3052, Australia
| | | | | | | | - Jörg Striessnig
- Pharmacology and Toxicology, Institute of Pharmacy, University of Innsbruck, A-6020, Innsbruck, Austria
| | - Jamie A Davies
- Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, EH8 9XD, UK
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Zili Luo
- University of Iowa, Iowa City, USA
| | | | | | | | | | | | - Hoa Phan
- University of Michigan, East Lansing, USA
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Han J, Park H, Maharana C, Gwon AR, Park J, Baek SH, Bae HG, Cho Y, Kim HK, Sul JH, Lee J, Kim E, Kim J, Cho Y, Park S, Palomera LF, Arumugam TV, Mattson MP, Jo DG. Alzheimer's disease-causing presenilin-1 mutations have deleterious effects on mitochondrial function. Am J Cancer Res 2021; 11:8855-8873. [PMID: 34522215 PMCID: PMC8419044 DOI: 10.7150/thno.59776] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/02/2021] [Indexed: 12/24/2022] Open
Abstract
Mitochondrial dysfunction and oxidative stress are frequently observed in the early stages of Alzheimer's disease (AD). Studies have shown that presenilin-1 (PS1), the catalytic subunit of γ-secretase whose mutation is linked to familial AD (FAD), localizes to the mitochondrial membrane and regulates its homeostasis. Thus, we investigated how five PS1 mutations (A431E, E280A, H163R, M146V, and Δexon9) observed in FAD affect mitochondrial functions. Methods: We used H4 glioblastoma cell lines genetically engineered to inducibly express either the wild-type PS1 or one of the five PS1 mutants in order to examine mitochondrial morphology, dynamics, membrane potential, ATP production, mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs), oxidative stress, and bioenergetics. Furthermore, we used brains of PS1M146V knock-in mice, 3xTg-AD mice, and human AD patients in order to investigate the role of PS1 in regulating MAMs formation. Results: Each PS1 mutant exhibited slightly different mitochondrial dysfunction. Δexon9 mutant induced mitochondrial fragmentation while A431E, E280A, H163R, and M146V mutants increased MAMs formation. A431E, E280A, M146V, and Δexon9 mutants also induced mitochondrial ROS production. A431E mutant impaired both complex I and peroxidase activity while M146V mutant only impaired peroxidase activity. All PS1 mutants compromised mitochondrial membrane potential and cellular ATP levels were reduced by A431E, M146V, and Δexon9 mutants. Through comparative profiling of hippocampal gene expression in PS1M146V knock-in mice, we found that PS1M146V upregulates Atlastin 2 (ATL2) expression level, which increases ER-mitochondria contacts. Down-regulation of ATL2 after PS1 mutant induction rescued abnormally elevated ER-mitochondria interactions back to the normal level. Moreover, ATL2 expression levels were significantly elevated in the brains of 3xTg-AD mice and AD patients. Conclusions: Overall, our findings suggest that each of the five FAD-linked PS1 mutations has a deleterious effect on mitochondrial functions in a variety of ways. The adverse effects of PS1 mutations on mitochondria may contribute to MAMs formation and oxidative stress resulting in an accelerated age of disease onset in people harboring mutant PS1.
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24
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Poh L, Razak SMBA, Lim HM, Lai MKP, Chen CLH, Lim LHK, Arumugam TV, Fann DY. AIM2 inflammasome mediates apoptotic and pyroptotic death in the cerebellum following chronic hypoperfusion. Exp Neurol 2021; 346:113856. [PMID: 34474007 DOI: 10.1016/j.expneurol.2021.113856] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 08/12/2021] [Accepted: 08/27/2021] [Indexed: 11/24/2022]
Abstract
Vascular dementia (VaD) is the second most common form of dementia and is caused by vascular pathologies resulting in chronic cerebral hypoperfusion (CCH)- induced brain injury, and ultimately cognitive impairment and memory loss. Several lines of evidence have demonstrated chronic inflammation may be involved in VaD disease progression. It is now recognized that a major contributor to cerebral and systemic chronic inflammation involves the activation of innate immune molecular complexes termed inflammasomes. Whilst previous studies on animal models of VaD have focused on the cortex, hippocampus and striatum, few studies have investigated the effect of CCH on the cerebellum. Emerging studies have found new roles of the cerebellum in cognition, based on its structural interconnectivity with other brain regions and clinical relevance in neuropsychological deficits. In the present study, we conducted our investigation on the cerebellum using a CCH mouse model of VaD following bilateral common carotid artery stenosis (BCAS). This study is the first to characterize an increased expression of inflammasome receptors, adaptor and effector proteins, markers of inflammasome activation, proinflammatory cytokines, and apoptotic and pyroptotic cell death proteins in the cerebellum following CCH. Furthermore, in AIM2 knockout mice, we observed attenuated inflammasome-mediated production of proinflammatory cytokines, apoptosis, and pyroptosis in the cerebellum following CCH. Collectively, our findings provide novel evidence that AIM2 inflammasome activation promotes apoptosis and pyroptosis in the cerebellum following chronic hypoperfusion in a mouse model of VaD.
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Affiliation(s)
- Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | - Hong Meng Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Mitchell K P Lai
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Christopher Li-Hsian Chen
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Lina H K Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea; Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia.
| | - David Y Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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25
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Poh L, Fann DY, Wong P, Lim HM, Foo SL, Kang SW, Rajeev V, Selvaraji S, Iyer VR, Parathy N, Khan MB, Hess DC, Jo DG, Drummond GR, Sobey CG, Lai MKP, Chen CLH, Lim LHK, Arumugam TV. AIM2 inflammasome mediates hallmark neuropathological alterations and cognitive impairment in a mouse model of vascular dementia. Mol Psychiatry 2021; 26:4544-4560. [PMID: 33299135 DOI: 10.1038/s41380-020-00971-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 11/12/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022]
Abstract
Chronic cerebral hypoperfusion is associated with vascular dementia (VaD). Cerebral hypoperfusion may initiate complex molecular and cellular inflammatory pathways that contribute to long-term cognitive impairment and memory loss. Here we used a bilateral common carotid artery stenosis (BCAS) mouse model of VaD to investigate its effect on the innate immune response-particularly the inflammasome signaling pathway. Comprehensive analyses revealed that chronic cerebral hypoperfusion induces a complex temporal expression and activation of inflammasome components and their downstream products (IL-1β and IL-18) in different brain regions, and promotes activation of apoptotic and pyroptotic cell death pathways. Polarized glial-cell activation, white-matter lesion formation and hippocampal neuronal loss also occurred in a spatiotemporal manner. Moreover, in AIM2 knockout mice we observed attenuated inflammasome-mediated production of proinflammatory cytokines, apoptosis, and pyroptosis, as well as resistance to chronic microglial activation, myelin breakdown, hippocampal neuronal loss, and behavioral and cognitive deficits following BCAS. Hence, we have demonstrated that activation of the AIM2 inflammasome substantially contributes to the pathophysiology of chronic cerebral hypoperfusion-induced brain injury and may therefore represent a promising therapeutic target for attenuating cognitive impairment in VaD.
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Affiliation(s)
- Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - David Y Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| | - Peiyan Wong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Neuroscience and Behavioural Disorders Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Hong Meng Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sok Lin Foo
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sung-Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vinaya Rajagopal Iyer
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Nageiswari Parathy
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | | | - David C Hess
- Department of Neurology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Grant R Drummond
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Christopher G Sobey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Christopher Li-Hsian Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Memory, Aging and Cognition Centre, National University Health System, Singapore, Singapore
| | - Lina H K Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea. .,Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia.
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26
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Abstract
A proper diet is important for health and longevity. Controlling the amount of food consumed is immensely beneficial as it promotes multiple cellular and molecular protective mechanisms and simultaneously prevents toxic mechanisms. Intermittent fasting (IF) is a flexible and easy-to-adopt dietary modification that helps to mitigate metabolic disorders like diabetes and hypertension, and thus the devastating age-related diseases like heart attack, stroke and dementia. The benefits of IF seem to be mediated by altered epigenetic and transcriptional programming leading to reduced oxidative stress, inflammation, mitochondrial damage and cell death.
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Affiliation(s)
- Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, USA.,William S. Middleton VA Hospital, Madison, USA
| | - Thiruma V Arumugam
- Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Melbourne, Australia
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27
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Dinh QN, Vinh A, Arumugam TV, Drummond GR, Sobey CG. G protein-coupled estrogen receptor 1: a novel target to treat cardiovascular disease in a sex-specific manner? Br J Pharmacol 2021; 178:3849-3863. [PMID: 33948934 DOI: 10.1111/bph.15521] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/23/2021] [Accepted: 04/28/2021] [Indexed: 12/19/2022] Open
Abstract
As an agonist of the classical nuclear receptors, estrogen receptor-α and -β (NR3A1/2), estrogen has been assumed to inhibit the development of cardiovascular disease in premenopausal women. Indeed, reduced levels of estrogen after menopause are believed to contribute to accelerated morbidity and mortality rates in women. However, estrogen replacement therapy has variable effects on cardiovascular risk in postmenopausal women, including increased serious adverse events. Interestingly, preclinical studies have shown that selective activation of the novel membrane-associated G protein-coupled estrogen receptor, GPER, can promote cardiovascular protection. These benefits are more evident in ovariectomised than intact females or in males. It is therefore possible that selective targeting of the GPER in postmenopausal women could provide cardiovascular protection with fewer adverse effects that are caused by conventional 'receptor non-specific' estrogen replacement therapy. This review describes new data regarding the merits of targeting GPER to treat cardiovascular disease with a focus on sex differences.
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Affiliation(s)
- Quynh Nhu Dinh
- Department of Physiology, Anatomy and Microbiology and Centre for Cardiovascular Biology and Disease Research, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Antony Vinh
- Department of Physiology, Anatomy and Microbiology and Centre for Cardiovascular Biology and Disease Research, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Thiruma V Arumugam
- Department of Physiology, Anatomy and Microbiology and Centre for Cardiovascular Biology and Disease Research, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Grant R Drummond
- Department of Physiology, Anatomy and Microbiology and Centre for Cardiovascular Biology and Disease Research, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Christopher G Sobey
- Department of Physiology, Anatomy and Microbiology and Centre for Cardiovascular Biology and Disease Research, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
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28
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Baik SH, Selvaraji S, Fann DY, Poh L, Jo DG, Herr DR, Zhang SR, Kim HA, Silva MD, Lai MK, Chen CLH, Drummond GR, Lim KL, Sobey CG, Arumugam TV. Hippocampal transcriptome profiling reveals common disease pathways in chronic hypoperfusion and aging. Aging (Albany NY) 2021; 13:14651-14674. [PMID: 34074801 PMCID: PMC8221317 DOI: 10.18632/aging.203123] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 05/11/2021] [Indexed: 12/13/2022]
Abstract
Vascular dementia (VaD) is a progressive cognitive impairment of vascular etiology. VaD is characterized by cerebral hypoperfusion, increased blood-brain barrier permeability and white matter lesions. An increased burden of VaD is expected in rapidly aging populations. The hippocampus is particularly susceptible to hypoperfusion, and the resulting memory impairment may play a crucial role in VaD. Here we have investigated the hippocampal gene expression profile of young and old mice subjected to cerebral hypoperfusion by bilateral common carotid artery stenosis (BCAS). Our data in sham-operated young and aged mice reveal an age-associated decline in cerebral blood flow and differential gene expression. In fact, BCAS and aging caused broadly similar effects. However, BCAS-induced changes in hippocampal gene expression differed between young and aged mice. Specifically, transcriptomic analysis indicated that in comparison to young sham mice, many pathways altered by BCAS in young mice resembled those already present in sham aged mice. Over 30 days, BCAS in aged mice had minimal effect on either cerebral blood flow or hippocampal gene expression. Immunoblot analyses confirmed these findings. Finally, relative to young sham mice the cell type-specific profile of genes in both young BCAS and old sham animals further revealed common cell-specific genes. Our data provide a genetic-based molecular framework for hypoperfusion-induced hippocampal damage and reveal common cellular signaling pathways likely to be important in the pathophysiology of VaD.
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Affiliation(s)
- Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sharmelee Selvaraji
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Integrative Sciences and Engineering Programme, NUS Graduate School, National University of Singapore
| | - David Y. Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Deron R. Herr
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Shenpeng R. Zhang
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Hyun Ah Kim
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Michael De Silva
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Mitchell K.P. Lai
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Christopher Li-Hsian Chen
- Memory Aging and Cognition Centre, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Grant R. Drummond
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Kah-Leong Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Christopher G. Sobey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
| | - Thiruma V. Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, Australia
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29
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Al Shoyaib A, Alamri FF, Syeara N, Jayaraman S, Karamyan ST, Arumugam TV, Karamyan VT. The Effect of Histone Deacetylase Inhibitors Panobinostat or Entinostat on Motor Recovery in Mice After Ischemic Stroke. Neuromolecular Med 2021; 23:471-484. [PMID: 33590407 DOI: 10.1007/s12017-021-08647-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 01/18/2021] [Indexed: 02/07/2023]
Abstract
Using rigorous and clinically relevant experimental design and analysis standards, in this study, we investigated the potential of histone deacetylase (HDAC) inhibitors panobinostat and entinostat to enhance recovery of motor function after photothrombotic stroke in male mice. Panobinostat, a pan-HDAC inhibitor, is a FDA-approved drug for certain cancers, whereas entinostat is a class-I HDAC inhibitor in late stage of clinical investigation. The drugs were administered every other day (panobinostat-3 or 10 mg/kg; entinostat-1.7 or 5 mg/kg) starting from day 5 to 15 after stroke. To imitate the current standard of care in stroke survivors, i.e., physical rehabilitation, the animals run on wheels (2 h daily) from post-stroke day 9 to 41. The predetermined primary end point was motor recovery measured in two tasks of spontaneous motor behaviors in grid-walking and cylinder tests. In addition, we evaluated the running distance and speed throughout the study, and the number of parvalbumin-positive neurons in medial agranular cortex (AGm) and infarct volumes at the end of the study. Both sensorimotor tests revealed that combination of physical exercise with either drug did not substantially affect motor recovery in mice after stroke. This was accompanied by negligible changes of parvalbumin-positive neurons recorded in AGm and comparable infarct volumes among experimental groups, while dose-dependent increase in acetylated histone 3 was observed in peri-infarct cortex of drug-treated animals. Our observations suggest that add-on panobinostat or entinostat therapy coupled with limited physical rehabilitation is unlikely to offer therapeutic modality for stroke survivors who have motor dysfunction.
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Affiliation(s)
- Abdullah Al Shoyaib
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), 1300 Coulter Street, Amarillo, TX, 79106, USA
| | - Faisal F Alamri
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), 1300 Coulter Street, Amarillo, TX, 79106, USA.,College of Sciences and Health Profession, King Saud bin Abdulaziz University for Health Sciences, Jeddah, Saudi Arabia.,King Abdullah International Medical Research Center, Jeddah, Saudi Arabia
| | - Nausheen Syeara
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), 1300 Coulter Street, Amarillo, TX, 79106, USA
| | - Srinidhi Jayaraman
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), 1300 Coulter Street, Amarillo, TX, 79106, USA
| | - Serob T Karamyan
- Department of Pharmacology, Faculty of Pharmacy, Yerevan State Medical University, Yerevan, Armenia
| | - Thiruma V Arumugam
- Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Melbourne, Australia
| | - Vardan T Karamyan
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center (TTUHSC), 1300 Coulter Street, Amarillo, TX, 79106, USA. .,Center for Blood Brain Barrier Research, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, USA.
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30
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Alamri FF, Al Shoyaib A, Syeara N, Paul A, Jayaraman S, Karamyan ST, Arumugam TV, Karamyan VT. Delayed atomoxetine or fluoxetine treatment coupled with limited voluntary running promotes motor recovery in mice after ischemic stroke. Neural Regen Res 2021; 16:1244-1251. [PMID: 33318401 PMCID: PMC8284259 DOI: 10.4103/1673-5374.301031] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Currently, there is an unmet need for treatments promoting post-stroke functional recovery. The aim of this study was to evaluate and compare the dose-dependent effect of delayed atomoxetine or fluoxetine therapy (starting on post-stroke day 5), coupled with limited physical exercise (2 hours daily voluntary wheel running; post-stroke days 9 to 42), on motor recovery of adult male mice after photothrombotic stroke. These drugs are selective norepinephrine or serotonin reuptake inhibitors indicated for disorders unrelated to stroke. The predetermined primary end-point for this study was motor function measured in two tasks of spontaneous motor behaviors in grid-walking and cylinder tests. Additionally, we quantified the running distance and speed throughout the study, the number of parvalbumin-positive neurons in the medial agranular cortex and infarct volumes. Both sensorimotor tests revealed that neither limited physical exercise nor a drug treatment alone significantly facilitated motor recovery in mice after stroke. However, combination of physical exercise with either of the drugs promoted restoration of motor function by day 42 post-stroke, with atomoxetine being a more potent drug. This was accompanied by a significant decrease in parvalbumin-positive inhibitory interneurons in the ipsilateral medial agranular cortex of mice with recovering motor function, while infarct volumes were comparable among experimental groups. If further validated in larger studies, our observations suggest that add-on atomoxetine or fluoxetine therapy coupled with limited, structured physical rehabilitation could offer therapeutic modality for stroke survivors who have difficulty to engage in early, high-intensity physiotherapy. Furthermore, in light of the recently completed Assessment oF FluoxetINe In sTroke recoverY (AFFINITY) and Efficacy oF Fluoxetine-a randomisEd Controlled Trial in Stroke (EFFECTS) trials, our observations call for newly designed studies where fluoxetine or atomoxetine pharmacotherapy is evaluated in combination with structured physical rehabilitation rather than alone. This study was approved by the Texas Tech University Health Sciences Center Institutional Animal Care and Use Committee (protocol # 16019).
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Affiliation(s)
- Faisal F Alamri
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA; Current address: College of Sciences and Health Profession, King Saud bin Abdulaziz University for Health Sciences and King Abdullah International Medical, Research Center, Jeddah, Saudi Arabia
| | - Abdullah Al Shoyaib
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA
| | - Nausheen Syeara
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA
| | - Anisha Paul
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA
| | - Srinidhi Jayaraman
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA
| | - Serob T Karamyan
- Department of Pharmacology, Faculty of Pharmacy, Yerevan State Medical University, Yerevan, Armenia
| | - Thiruma V Arumugam
- Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Melbourne, Australia
| | - Vardan T Karamyan
- Department of Pharmaceutical Sciences; Center for Blood Brain Barrier Research, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX, USA
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31
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Park J, Ha HJ, Chung ES, Baek SH, Cho Y, Kim HK, Han J, Sul JH, Lee J, Kim E, Kim J, Yang YR, Park M, Kim SH, Arumugam TV, Jang H, Seo SW, Suh PG, Jo DG. O-GlcNAcylation ameliorates the pathological manifestations of Alzheimer's disease by inhibiting necroptosis. Sci Adv 2021; 7:7/3/eabd3207. [PMID: 33523877 PMCID: PMC7806231 DOI: 10.1126/sciadv.abd3207] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 11/19/2020] [Indexed: 05/02/2023]
Abstract
O-GlcNAcylation (O-linked β-N-acetylglucosaminylation) is notably decreased in Alzheimer's disease (AD) brain. Necroptosis is activated in AD brain and is positively correlated with neuroinflammation and tau pathology. However, the links among altered O-GlcNAcylation, β-amyloid (Aβ) accumulation, and necroptosis are unclear. Here, we found that O-GlcNAcylation plays a protective role in AD by inhibiting necroptosis. Necroptosis was increased in AD patients and AD mouse model compared with controls; however, decreased necroptosis due to O-GlcNAcylation of RIPK3 (receptor-interacting serine/threonine protein kinase 3) was observed in 5xFAD mice with insufficient O-linked β-N-acetylglucosaminase. O-GlcNAcylation of RIPK3 suppresses phosphorylation of RIPK3 and its interaction with RIPK1. Moreover, increased O-GlcNAcylation ameliorated AD pathology, including Aβ burden, neuronal loss, neuroinflammation, and damaged mitochondria and recovered the M2 phenotype and phagocytic activity of microglia. Thus, our data establish the influence of O-GlcNAcylation on Aβ accumulation and neurodegeneration, suggesting O-GlcNAcylation-based treatments as potential interventions for AD.
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Affiliation(s)
- Jinsu Park
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
- Department of Health Science and Technology, Sungkyunkwan University, Seoul 06351, Korea
| | - Hee-Jin Ha
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Eun Seon Chung
- Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA, USA
| | - Seung Hyun Baek
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Yoonsuk Cho
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Hark Kyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Jihoon Han
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Jae Hoon Sul
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Jeongmi Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Eunae Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Junsik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Yong Ryoul Yang
- Aging Research Center, Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Mikyoung Park
- Center for Functional Connectomics, Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Korea
| | - Sung Hyun Kim
- Department of Physiology, School of Medicine, Kyung Hee University, Seoul 02447, Korea
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
- School of Life Sciences, La Trobe University, Melbourne, Victoria, Australia
| | - Hyemin Jang
- Samsung Alzheimer's Research Center, Samsung Medical Center, Seoul 06351, Korea
| | - Sang Won Seo
- Department of Neurology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul 06351, Korea
| | | | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea.
- Department of Health Science and Technology, Sungkyunkwan University, Seoul 06351, Korea
- Biomedical Institute for Convergence, Sungkyunkwan University, Suwon 16419, Korea
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Fann DY, Nickles EP, Poh L, Rajeev V, Selvaraji S, Schwarz H, Arumugam TV. CD137 Ligand-CD137 Interaction is Required For Inflammasome-Associated Brain Injury Following Ischemic Stroke. Neuromolecular Med 2020; 22:474-483. [PMID: 33073305 DOI: 10.1007/s12017-020-08623-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 10/08/2020] [Indexed: 10/23/2022]
Abstract
The CD137L-CD137 axis is a potent co-stimulatory immune checkpoint regulator that forms a bidirectional signaling pathway between the CD137 ligand (CD137L) and CD137 receptor to regulate immunological activities. This study investigated the potential involvement of the CD137L-CD137 axis on inflammasome-associated brain injury and neurological deficits in a mouse model of focal ischemic stroke. Cerebral ischemia was induced in male C57BL/6J wild-type (WT), CD137L-deficient (CD137L KO) and CD137-deficient (CD137 KO) mice by middle cerebral artery occlusion (MCAO; 60 min), followed by reperfusion (6 h and 24 h). Brain infarct volume and neurological deficit scores were significantly lower in both CD137L KO and CD137 KO mice compared to WT controls. Moreover, CD137L-deficient brains had significantly lower levels of the pyroptotic protein, NT-Gasdermin D, while CD137-deficient brains had significantly lower levels of the pro-apoptotic proteins, cleaved caspase-3, pyroptotic protein, NT-Gasdermin D, and of the secondary pyroptotic protein NT-Gasdermin E, following ischemic stroke. This protection by CD137L and CD137 deletion was associated with a significant decrease in inflammasome signaling. In conclusion, our data provide evidence for the first time that the CD137L-CD137 axis contributes to brain injury and neurological deficits by activating the inflammasome signaling pathway following ischemic stroke.
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Affiliation(s)
- David Y Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Emily Pauline Nickles
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Immunology Programme, National University of Singapore, Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Herbert Schwarz
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Immunology Programme, National University of Singapore, Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea. .,Department of Physiology, Anatomy and Microbiology, School of Life Sciences, La Trobe University, Bundoora, VIC, Australia.
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Udawatte NS, Kang SW, Wang Y, Arumugam TV, Seneviratne CJ. Predictive Nephrotoxicity Profiling of a Novel Antifungal Small Molecule in Comparison to Amphotericin B and Voriconazole. Front Pharmacol 2020; 11:511. [PMID: 32390849 PMCID: PMC7193989 DOI: 10.3389/fphar.2020.00511] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 03/31/2020] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND AND PURPOSE Candida albicans is the major fungal species associated with superficial mucosal infections such as oral candidiasis as well as systemic mycoses with high morbidity and mortality. On top of the rising drug resistance, currently available antifungal agents have significant adverse effects. Nephrotoxicity is the major treatment complication associated with antifungal agents.Recently, we discovered a novel antifungal small molecule SM21 with promising antifungal activity. The present study aimed to comparatively evaluate the in vivo and in vitro nephrotoxicity of SM21 comparing with Amphotericin B and voriconazole. EXPERIMENTAL APPROACH Nephrotoxicity of SM21 and its analogue were comparatively evaluated with Amphotericin B (AmB) and voriconazole. Immortalized human kidney proximal tubule epithelial cells (HK-2) were used for in vitro analysis of nephrotoxicity using cytotoxicity assays and qPCR gene expression analysis (Kim-1/HAVcr-1, CASP3). Sprague Dawley (SD) rat model was used to evaluate the nephrotoxicity in vivo using classical (SCr and BUN) and next-generation kidney injury urinary biomarkers (Kim-1, CLU, ALB, NGAL, β2M, and Cys C) alongside histopathological and immunohistochemical standards. KEY RESULTS AmB treatment showed a stronger cytotoxic impact on HK-2 viability and gene expression of cell death markers (Kim-1/HAVcr-1, CASP3) compared with SM21 and SM21 analogue in vitro (P < 0.01). In vivo data further demonstrated that SM21 did not significantly increase classical as well as novel nephrotoxic biomarkers, and minimal renal tubular necrosis and abnormalities were observed (15 mg kg-1 BW/day). CONCLUSIONS AND IMPLICATIONS SM21 had a significantly better safety profile in terms of nephrotoxicity with no major tubular epithelial abnormalities observed in kidney cells and no augmentation of kidney injury biomarkers compared to AmB. Kim-1 and CLU were the most sensitive biomarkers for detection of AmB-induced kidney damage. Future clinical trials should consider inclusion of these novel biomarkers as early indicators of acute kidney injury in antifungal-induced nephrotoxicity.
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Affiliation(s)
- Nadeeka S. Udawatte
- National Dental Centre Singapore, Oral Health ACP, Duke-NUS Medical School, Singapore, Singapore
| | - Sung Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yue Wang
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Thiruma V. Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Chaminda J. Seneviratne
- National Dental Centre Singapore, Oral Health ACP, Duke-NUS Medical School, Singapore, Singapore
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34
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Alamri FF, Al Shoyaib A, Syeara N, Paul A, Jayaraman S, Karamyan S, Arumugam TV, Karamyan VT. Late Atomoxetine or Fluoxetine Treatment with Low Duration Voluntary Running Facilitate Recovery of the Motor Function after Photothrombotic Stroke in Mice. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.06425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - Anisha Paul
- Texas Tech University Health Sciences Center
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35
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Vemuganti R, Arumugam TV. Molecular Mechanisms of Intermittent Fasting-induced Ischemic Tolerance. Cond Med 2020; 3:9-17. [PMID: 34278242 PMCID: PMC8281895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Diet is a significant factor in determining human well-being. Excessive eating and/or diets with higher than needed amounts of carbohydrates, salt, and fat are known to cause metabolic disorders and functional changes in the body. To compensate the ill effects, many designer diets including the Mediterranean diet, the Okinawa diet, vegetarian/vegan diets, keto diet, anti-inflammatory diet, and the anti-oxidant diet have been introduced in the past 2 decades. While these diets are either enriched or devoid of one or more specific components, a better way to control diet is to limit the amount of food consumed. Caloric restriction (CR), which involves limiting the amount of food consumed rather than eliminating any specific type of food, as well as intermittent fasting (IF), which entails limiting the time during which food can be consumed on a given day, have gained popularity because of their positive effects on human health. While the molecular mechanisms of these 2 dietary regimens have not been fully deciphered, they are known to prolong the life span, control blood pressure, and blood glucose levels. Furthermore, CR and IF were both shown to decrease the incidence of heart attack and stroke, as well as their ill effects. In particular, IF is thought to promote metabolic switching by altering gene expression profiles leading to reduced inflammation and oxidative stress, while increasing plasticity and regeneration.
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Affiliation(s)
- Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA
- William S. Middleton VA Hospital, Madison, WI, USA
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36
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Baik SH, Rajeev V, Fann DYW, Jo DG, Arumugam TV. Intermittent fasting increases adult hippocampal neurogenesis. Brain Behav 2020; 10:e01444. [PMID: 31804775 PMCID: PMC6955834 DOI: 10.1002/brb3.1444] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 08/24/2019] [Accepted: 09/18/2019] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Intermittent fasting (IF) has been suggested to have neuroprotective effects through the activation of multiple signaling pathways. Rodents fasted intermittently exhibit enhanced hippocampal neurogenesis and long-term potentiation (LTP) at hippocampal synapses compared with sedentary animals fed an ad libitum (AL) diet. However, the underlying mechanisms have not been studied. In this study, we evaluated the mechanistic gap in understanding IF-induced neurogenesis. METHODS We evaluated the impact of 3 months of IF (12, 16, and 24 hr of food deprivation on a daily basis) on hippocampal neurogenesis in C57BL/6NTac mice using immunoblot analysis. RESULTS Three-month IF significantly increased activation of the Notch signaling pathway (Notch 1, NICD1, and HES5), neurotrophic factor BDNF, and downstream cellular transcription factor, cAMP response element-binding protein (p-CREB). The expression of postsynaptic marker, PSD95, and neuronal stem cell marker, Nestin, was also increased in the hippocampus in response to 3-month IF. CONCLUSIONS These findings suggest that IF may increase hippocampal neurogenesis involving the Notch 1 pathway.
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Affiliation(s)
- Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - Vismitha Rajeev
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore.,School of Pharmacy, Sungkyunkwan University, Suwon, Korea.,Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore City, Singapore
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37
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Park J, Lai MKP, Arumugam TV, Jo DG. O-GlcNAcylation as a Therapeutic Target for Alzheimer's Disease. Neuromolecular Med 2020; 22:171-193. [PMID: 31894464 DOI: 10.1007/s12017-019-08584-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 12/13/2019] [Indexed: 02/06/2023]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia and the number of elderly patients suffering from AD has been steadily increasing. Despite worldwide efforts to cope with this disease, little progress has been achieved with regard to identification of effective therapeutics. Thus, active research focusing on identification of new therapeutic targets of AD is ongoing. Among the new targets, post-translational modifications which modify the properties of mature proteins have gained attention. O-GlcNAcylation, a type of PTM that attaches O-linked β-N-acetylglucosamine (O-GlcNAc) to a protein, is being sought as a new target to treat AD pathologies. O-GlcNAcylation has been known to modify the two important components of AD pathological hallmarks, amyloid precursor protein, and tau protein. In addition, elevating O-GlcNAcylation levels in AD animal models has been shown to be effective in alleviating AD-associated pathology. Although studies investigating the precise mechanism of reversal of AD pathologies by targeting O-GlcNAcylation are not yet complete, it is clearly important to examine O-GlcNAcylation regulation as a target of AD therapeutics. This review highlights the mechanisms of O-GlcNAcylation and its role as a potential therapeutic target under physiological and pathological AD conditions.
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Affiliation(s)
- Jinsu Park
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Korea
- Department of Health Science and Technology, Sungkyunkwan University, Seoul, 06351, Korea
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
| | - Thiruma V Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Korea.
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore, 117593, Singapore.
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, VIC, Australia.
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419, Korea.
- Department of Health Science and Technology, Sungkyunkwan University, Seoul, 06351, Korea.
- Biomedical Institute for Convergence, Sungkyunkwan University, Suwon, 16419, Korea.
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38
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Yong-Quan Ng G, Yang-Wei Fann D, Jo DG, Sobey CG, Arumugam TV. Dietary Restriction and Epigenetics: Part I. Cond Med 2019; 2:284-299. [PMID: 32039345 PMCID: PMC7007115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Biological aging occurs concomitantly with chronological aging and is commonly burdened by the development of age-related conditions, such as neurodegenerative, cardiovascular, and a myriad of metabolic diseases. With a current global shift in disease epidemiology associated with aging and the resultant social, economic, and healthcare burdens faced by many countries, the need to achieve successful aging has fueled efforts to address this problem. Aging is a complex biological phenomenon that has confounded much of the historical research effort to understand it, with still limited knowledge of the underlying molecular mechanisms. Interestingly, dietary restriction (DR) is one intervention that produces anti-aging effects from simple organisms to mammals. Research into DR has revealed robust systemic effects that can result in attenuation of age-related diseases via a myriad of molecular mechanisms. Given that numerous age-associated diseases are often polygenic and affect individuals differently, it is possible that they are confounded by interactions between environmental influences and the genome, a process termed 'epigenetics'. In part one of the review, we summarize the different variants of DR regimens and their corresponding mechanism(s) and resultant effects, as well as in-depth analysis of current knowledge of the epigenetic landscape.
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Affiliation(s)
- Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Christopher G. Sobey
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Thiruma V. Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
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39
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Chan SJ, Zhao H, Hayakawa K, Chai C, Tan CT, Huang J, Tao R, Hamanaka G, Arumugam TV, Lo EH, Yu VCK, Wong PH. Modulator of apoptosis-1 is a potential therapeutic target in acute ischemic injury. J Cereb Blood Flow Metab 2019; 39:2406-2418. [PMID: 30132384 PMCID: PMC6893981 DOI: 10.1177/0271678x18794839] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Modulator of apoptosis 1 (MOAP-1) is a Bax-associating protein highly enriched in the brain. In this study, we examined the role of MOAP-1 in promoting ischemic injuries following a stroke by investigating the consequences of MOAP-1 overexpression or deficiency in in vitro and in vivo models of ischemic stroke. MOAP-1 overexpressing SH-SY5Y cells showed significantly lower cell viability following oxygen and glucose deprivation (OGD) treatment when compared to control cells. Consistently, MOAP-1-/- primary cortical neurons were observed to be more resistant against OGD treatment than the MOAP-1+/+ primary neurons. In the mouse transient middle cerebral artery occlusion (tMCAO) model, ischemia triggered MOAP-1/Bax association, suggested activation of the MOAP-1-dependent apoptotic cascade. MOAP-1-/- mice were found to exhibit reduced neuronal loss and smaller infarct volume 24 h after tMCAO when compared to MOAP-1+/+ mice. Correspondingly, MOAP-1-/- mice also showed better integrity of neurological functions as demonstrated by their performance in the rotarod test. Therefore, both in vitro and in vivo data presented strongly support the conclusion that MOAP-1 is an important apoptotic modulator in ischemic injury. These results may suggest that a reduction of MOAP-1 function in the brain could be a potential therapeutic approach in the treatment of acute stroke.
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Affiliation(s)
- Su Jing Chan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, Singapore, Singapore.,Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Institute of Medical Biology, Glycotherapeutics Group, A*STAR, Singapore
| | - Hui Zhao
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, Singapore, Singapore
| | - Kazuhide Hayakawa
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Chou Chai
- Neurodegeneration Laboratory, Research Department, National Neuroscience Institute, Singapore, Singapore
| | - Chong Teik Tan
- Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Jiawen Huang
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, Singapore, Singapore
| | - Ran Tao
- Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - Gen Hamanaka
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, Singapore, Singapore
| | - Eng H Lo
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Victor Chun Kong Yu
- Department of Pharmacy, National University of Singapore, Singapore, Singapore
| | - PeterTsun-Hon Wong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, Singapore, Singapore
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Yong-Quan Ng G, Fann DYW, Jo DG, Sobey CG, Arumugam TV. Epigenetic Regulation by Dietary Restriction: Part II. Cond Med 2019; 2:300-310. [PMID: 32039346 PMCID: PMC7007178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the first part of our review, we extensively discuss the different variants of dietary restriction (DR) regimens, as well as its corresponding mechanism(s) and subsequent effects. We also provide a detailed analysis of the different epigenetic mechanisms based on current knowledge. We postulate that DR may represent an environmental intervention that can modulate the epigenomic profile of an individual. It is highly plausible that epigenetic regulation by DR may help explain the asymmetric manifestation of DR effects in different individuals. Additionally, epigenetic modifications via DR may lead to epigenetic programming, providing protection against age-associated diseases, which in turn could lead to reduced morbidity and increased lifespan. In the second part of the review, we summarize recent findings that highlight the epigenomic axis of DR, which provides a better understanding of the mechanisms by which its numerous health benefits are achieved.
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Affiliation(s)
- Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Christopher G. Sobey
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Thiruma V. Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
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41
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Jayaraman S, Al Shoyaib A, Kocot J, Villalba H, Alamri FF, Rashid M, Wangler NJ, Chowdhury EA, German N, Arumugam TV, Abbruscato TJ, Karamyan VT. Peptidase neurolysin functions to preserve the brain after ischemic stroke in male mice. J Neurochem 2019; 153:120-137. [PMID: 31486527 DOI: 10.1111/jnc.14864] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/26/2019] [Accepted: 08/28/2019] [Indexed: 12/13/2022]
Abstract
Previous studies documented up-regulation of peptidase neurolysin (Nln) after brain ischemia, however, the significance of Nln function in the post-stroke brain remained unknown. The aim of this study was to assess the functional role of Nln in the brain after ischemic stroke. Administration of a specific Nln inhibitor Agaricoglyceride A (AgaA) to mice after stroke in a middle cerebral artery occlusion model, dose-dependently aggravated injury measured by increased infarct and edema volumes, blood-brain barrier disruption, increased levels of interleukin 6 and monocyte chemoattractant protein-1, neurological and motor deficit 24 h after stroke. In this setting, AgaA resulted in inhibition of Nln in the ischemic hemisphere leading to increased levels of Nln substrates bradykinin, neurotensin, and substance P. AgaA lacked effects on several physiological parameters and appeared non-toxic to mice. In a reverse approach, we developed an adeno-associated viral vector (AAV2/5-CAG-Nln) to overexpress Nln in the mouse brain. Applicability of AAV2/5-CAG-Nln to transduce catalytically active Nln was confirmed in primary neurons and in vivo. Over-expression of Nln in the mouse brain was also accompanied by decreased levels of its substrates. Two weeks after in vivo transduction of Nln using the AAV vector, mice were subjected to middle cerebral artery occlusion and the same outcome measures were evaluated 72 h later. These experiments revealed that abundance of Nln in the brain protects animals from stroke. This study is the first to document functional significance of Nln in pathophysiology of stroke and provide evidence that Nln is an endogenous mechanism functioning to preserve the brain from ischemic injury.
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Affiliation(s)
- Srinidhi Jayaraman
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Abdullah Al Shoyaib
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Joanna Kocot
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Heidi Villalba
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Faisal F Alamri
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Mamoon Rashid
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Naomi J Wangler
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Ekram A Chowdhury
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Nadezhda German
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thomas J Abbruscato
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA.,Center for Blood Brain Barrier Research, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
| | - Vardan T Karamyan
- Department of Pharmaceutical Sciences, School of Pharmacy, TTUHSC, Amarillo, Texas, USA.,Center for Blood Brain Barrier Research, School of Pharmacy, TTUHSC, Amarillo, Texas, USA
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42
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Ng GYQ, Kang SW, Kim J, Alli-Shaik A, Baik SH, Jo DG, Hande MP, Sobey CG, Gunaratne J, Fann DYW, Arumugam TV. Genome-Wide Transcriptome Analysis Reveals Intermittent Fasting-Induced Metabolic Rewiring in the Liver. Dose Response 2019; 17:1559325819876780. [PMID: 31598117 PMCID: PMC6764061 DOI: 10.1177/1559325819876780] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 08/21/2019] [Accepted: 08/27/2019] [Indexed: 12/11/2022] Open
Abstract
Scope: Intermittent fasting (IF) has been extensively reported to promote improved energy homeostasis and metabolic switching. While IF may be a plausible strategy to ameliorate the epidemiological burden of disease in many societies, our understanding of the underlying molecular mechanisms behind such effects is still lacking. The present study has sought to investigate the relationship between IF and changes in gene expression. We focused on the liver, which is highly sensitive to metabolic changes due to energy status. Mice were randomly assigned to ad libitum feeding or IF for 16 hours per day or for 24 hours on alternate days for 3 months, after which genome-wide transcriptome analysis of the liver was performed using RNA sequencing. Our findings revealed that IF caused robust transcriptomic changes in the liver that led to a complex array of metabolic changes. We also observed that the IF regimen produced distinct profiles of transcriptomic changes, highlighting the significance of temporally different periods of energy restriction. Our results suggest that IF can regulate metabolism via transcriptomic mechanisms and provide insight into how genetic interactions within the liver might lead to the numerous metabolic benefits of IF.
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Affiliation(s)
- Gavin Yong-Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sung-Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Joonki Kim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Natural Product Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea
| | - Asfa Alli-Shaik
- Translational Biomedical Proteomics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - M Prakash Hande
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Christopher G Sobey
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - Jayantha Gunaratne
- Translational Biomedical Proteomics, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore.,Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea.,Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore, Singapore
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43
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Kim J, Selvaraji S, Kang SW, Lee WT, Chen CLH, Choi H, Koo EH, Jo DG, Leong Lim K, Lim YA, Arumugam TV. Cerebral transcriptome analysis reveals age-dependent progression of neuroinflammation in P301S mutant tau transgenic male mice. Brain Behav Immun 2019; 80:344-357. [PMID: 30980950 DOI: 10.1016/j.bbi.2019.04.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/31/2019] [Accepted: 04/02/2019] [Indexed: 12/31/2022] Open
Abstract
Aggregation of the microtubule-associated protein, tau, can lead to neurofibrillary tangle formation in neurons and glia which is the hallmark of tauopathy. The cellular damage induced by the formation of neurofibrillary tangles leads to neuroinflammation and consecutive neuronal death. However, detailed observation of transcriptomic changes under tauopathy together with the comparison of age-dependent progression of neuroinflammatory gene expressions mediated by tau overexpression is required. Employing RNA sequencing on PS19 transgenic mice that overexpress human mutant tau harboring the P301S mutation, we have examined the effects of age-dependent tau overexpression on transcriptomic changes of immune and inflammatory responses in the cerebral cortex. Compared to age-matched wild type control, P301S transgenic mice exhibit significant transcriptomic alterations. We have observed age-dependent neuroinflammatory gene expression changes in both wild type and P301S transgenic mice where tau overexpression further promoted the expression of neuroinflammatory genes in 10-month old P301S transgenic mice. Moreover, functional gene network analyses (gene ontology and pathway enrichment) and prospective target protein interactions predicted the potential involvement of multiple immune and inflammatory pathways that may contribute to tau-mediated neuronal pathology. Our current study on P301S transgenic mice model revealed for the first time, the differences of gene expression patterns in both early and late stage of tau pathology in cerebral cortex. Our analyses also revealed that tau overexpression alone induces multiple inflammatory and immune transcriptomic changes and may provide a roadmap to elucidate the targets of anti-inflammatory therapeutic strategy focused on tau pathology and related neurodegenerative diseases.
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Affiliation(s)
- Joonki Kim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do, Republic of Korea
| | - Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sung Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wei Thye Lee
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Christopher Li-Hsian Chen
- Department of Pharmacology, National University of Singapore, Singapore; Memory Aging and Cognition Centre, National University Health System, Singapore
| | - Hyungwon Choi
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore; Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research, Singapore
| | - Edward H Koo
- Department of Medicine, Yong Loo Lin School of Medicine, National University Health System, Singapore
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do, Republic of Korea
| | - Kah Leong Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Neurodegeneration Research Laboratory, National Neuroscience Institute, Singapore; Neuroscience and Behavioral Disorders Program, Duke-NUS Medical School, Singapore; Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore
| | - Yun-An Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; School of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do, Republic of Korea; Neurobiology Programme, Life Sciences Institute, National University of Singapore, Singapore.
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44
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Zhang SR, Nold MF, Tang SC, Bui CB, Nold CA, Arumugam TV, Drummond GR, Sobey CG, Kim HA. IL-37 increases in patients after ischemic stroke and protects from inflammatory brain injury, motor impairment and lung infection in mice. Sci Rep 2019; 9:6922. [PMID: 31061403 PMCID: PMC6502884 DOI: 10.1038/s41598-019-43364-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 04/23/2019] [Indexed: 01/14/2023] Open
Abstract
Post-stroke inflammation may contribute to secondary brain injury and systemic immunosuppression. Interleukin(IL)-37 is an immunosuppressive cytokine belonging to the IL-1 superfamily with no mouse homologue yet identified, the effects of which have not been studied in stroke. Here we report: (1) the effect of ischemic stroke on circulating IL-37 in humans; and (2) the effect of IL-37 on stroke outcome measures in mice transgenic for human IL-37 (IL-37tg). We found that in the first 3 days after ischemic stroke in 55 patients, the plasma abundance of IL-37 was ~2-fold higher than in 24 controls. In IL-37tg mice, cerebral ischemia-reperfusion resulted in marked increases in plasma IL-37 (~9-fold) and brain IL-37 mRNA (~7,000-fold) at 24 h compared with sham-operated IL-37tg mice. Further, compared with wild-type (WT) mice subjected to cerebral ischemia-reperfusion, IL-37tg mice exhibited less severe locomotor deficit, smaller cerebral infarcts and reduced bacterial lung infection. In the ischemic hemisphere, there were 60% fewer pro-inflammatory microglia-macrophages and up to 4-fold higher expression of anti-inflammatory markers in IL-37tg compared to WT mice. Our data show that IL-37 expression is increased following ischemic stroke in humans and IL-37tg mice, and may exert protective effects by modulating post-stroke inflammation in the brain and periphery.
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Affiliation(s)
- Shenpeng R Zhang
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia.,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Clayton, Victoria, Australia
| | - Marcel F Nold
- Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Victoria, 3168, Australia.,Department of Paediatrics, Monash University, Melbourne, Victoria, 3168, Australia
| | - Sung-Chun Tang
- Department of Neurology, National Taiwan University Hospital, Taipei, 10002, Taiwan
| | - Christine B Bui
- Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Victoria, 3168, Australia.,Department of Paediatrics, Monash University, Melbourne, Victoria, 3168, Australia
| | - Claudia A Nold
- Ritchie Centre, Hudson Institute of Medical Research, Melbourne, Victoria, 3168, Australia.,Department of Paediatrics, Monash University, Melbourne, Victoria, 3168, Australia
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,School of Pharmacy, Sungkyunkwan University, Seoul, South Korea
| | - Grant R Drummond
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia.,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Clayton, Victoria, Australia
| | - Christopher G Sobey
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia. .,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Clayton, Victoria, Australia.
| | - Hyun Ah Kim
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia.,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Pharmacology, Monash University, Clayton, Victoria, Australia
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45
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Kim J, Kang SW, Mallilankaraman K, Baik SH, Lim JC, Balaganapathy P, She DT, Lok KZ, Fann DY, Thambiayah U, Tang SC, Stranahan AM, Dheen ST, Gelderblom M, Seet RC, Karamyan VT, Vemuganti R, Sobey CG, Mattson MP, Jo DG, Arumugam TV. Transcriptome analysis reveals intermittent fasting-induced genetic changes in ischemic stroke. Hum Mol Genet 2019; 27:1497-1513. [PMID: 29447348 DOI: 10.1093/hmg/ddy057] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 02/10/2018] [Indexed: 12/12/2022] Open
Abstract
Genetic changes due to dietary intervention in the form of either calorie restriction (CR) or intermittent fasting (IF) are not reported in detail until now. However, it is well established that both CR and IF extend the lifespan and protect against neurodegenerative diseases and stroke. The current research aims were first to describe the transcriptomic changes in brains of IF mice and, second, to determine whether IF induces extensive transcriptomic changes following ischemic stroke to protect the brain from injury. Mice were randomly assigned to ad libitum feeding (AL), 12 (IF12) or 16 (IF16) h daily fasting. Each diet group was then subjected to sham surgery or middle cerebral artery occlusion and consecutive reperfusion. Mid-coronal sections of ipsilateral cerebral tissue were harvested at the end of the 1 h ischemic period or at 3, 12, 24 or 72 h of reperfusion, and genome-wide mRNA expression was quantified by RNA sequencing. The cerebral transcriptome of mice in AL group exhibited robust, sustained up-regulation of detrimental genetic pathways under ischemic stroke, but activation of these pathways was suppressed in IF16 group. Interestingly, the cerebral transcriptome of AL mice was largely unchanged during the 1 h of ischemia, whereas mice in IF16 group exhibited extensive up-regulation of genetic pathways involved in neuroplasticity and down-regulation of protein synthesis. Our data provide a genetic molecular framework for understanding how IF protects brain cells against damage caused by ischemic stroke, and reveal cellular signaling and bioenergetic pathways to target in the development of clinical interventions.
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Affiliation(s)
- Joonki Kim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore.,Natural Products Research Center, Korea Institute of Science and Technology, Gangneung, Gangwon-do 25451, Republic of Korea
| | - Sung-Wook Kang
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - James C Lim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Priyanka Balaganapathy
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - David T She
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Ker-Zhing Lok
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - David Y Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Uma Thambiayah
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore
| | - Sung-Chun Tang
- Department of Neurology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei 100, Taiwan
| | - Alexis M Stranahan
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - S Thameem Dheen
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, 117594, Singapore
| | - Mathias Gelderblom
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Raymond C Seet
- Division of Neurology, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 119228, Singapore
| | - Vardan T Karamyan
- Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA.,Center for Blood Brain Barrier Research, School of Pharmacy, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI 53792, USA
| | - Christopher G Sobey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, 3086 VIC, Australia
| | - Mark P Mattson
- Intramural Research Program, Laboratory of Neurosciences, National Institute on Aging, Baltimore, MD 21224, USA.,Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Dong-Gyu Jo
- School of Pharmacy, Sungkyunkwan University, Suwon, 16419 Republic of Korea
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore.,School of Pharmacy, Sungkyunkwan University, Suwon, 16419 Republic of Korea.,Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, 117456, Singapore
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46
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Alamri FF, Al Shoyaib A, Paul A, Jayaraman S, Arumugam TV, Karamyan VT. Abstract TP131: SNRI Atomoxetine and SSRI Fluoxetine Promote Motor Recovery After Photothrombotic Stroke in Mice. Stroke 2019. [DOI: 10.1161/str.50.suppl_1.tp131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to evaluate the potential of pharmacological modulation of adrenergic and serotoninergic systems in post-stroke motor recovery in mice. For this purpose, the effects of selective norepinephrine reuptake inhibitor atomoxetine (1 mg/kg, once a day, i.p.) and selective serotonin reuptake inhibitor fluoxetine (10 mg/kg, once a day, i.p.) were studied on recovery of motor function in adult male mice after photothrombotic stroke. Vehicle or drug treatments were initiated on day 5 after photothrombosis and lasted until post-stroke day 16. In addition to pharmacological therapy, mice were allowed to voluntarily run on a wheel in their home cage starting from day 9 after stroke. Motor function was assessed in grid walking and cylinder tests 3 days before and 3, 7, 14, 28 and 42 days after stroke. On post-stroke day 42, mouse brains were fixed by cardiac perfusion and collected for sectioning and evaluation of infarct volume (cresyl violet staining) and molecular markers (immunofluorescence). The results of both sensorimotor tests indicated that all groups had substantial and comparable motor impairment on post-stroke day 3 (p < 0.01 compared to respective baselines), and that voluntary running started 9 days post-stroke did not significantly facilitate motor recovery after stroke (p > 0.05, vehicle-treated vs. stroke alone). However, treatment of mice with atomoxetine or fluoxetine significantly potentiated motor recovery by day 42 after stroke (p < 0.05 compared to vehicle-treated and stroke alone groups). The average total distance run by mice receiving vehicle or either of the drugs was comparable (1653 ± 110 meters). Infarct volumes measured at day 42 post-stroke were also comparable in experimental groups (1.7 ± 0.2 mm
3
). Our data indicate that moderate voluntary running starting 9 days after stroke does not facilitate motor recovery after stroke in mice. However, pharmacological modulation of adrenergic or serotoninergic systems, in addition to moderate voluntary running, enhances motor recovery in mice. Our ongoing studies focus on evaluation of the dose-dependence of atomoxetine and fluoxetine effects, and elucidation of molecular signaling pathways responsible for the observed effects of these drugs.
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47
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Selvaraji S, Poh L, Natarajan V, Mallilankaraman K, Arumugam TV. Negative Conditioning of Mitochondrial Dysfunction in Age-related Neurodegenerative Diseases. Cond Med 2019; 2:30-39. [PMID: 31058265 PMCID: PMC6497175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Mitochondrial dysfunction is regarded as one of the major causes of neuronal injury in age-associated neurodegenerative diseases and stroke. Mitochondrial dysfunction leads to increased reactive oxygen species production, causing mitochondrial DNA mutations, which then results in pathological conditions. Negative conditioning of mitochondrial dysfunction via pharmacological inhibition, phytochemicals, and dietary restriction serve as an avenue for therapeutic intervention to improve mitochondrial quality and function. Here, we focus primarily on mitochondrial biology, evidence for mitochondrial dysfunction in neurodegenerative conditions such as dementia and stroke, and the possibility of using negative conditioning to restore or preserve mitochondrial function in these diseases.
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Affiliation(s)
- Sharmelee Selvaraji
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Venkateswaran Natarajan
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Thiruma V. Arumugam
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, Singapore
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48
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Jayaraman S, Rashid M, Wangler NJ, Villalba H, German N, Arumugam TV, Abbruscato TJ, Karamyan VT. Abstract 157: Peptidase Neurolysin Functions to Preserve the Brain After Ischemic Stroke in Mice. Stroke 2019. [DOI: 10.1161/str.50.suppl_1.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study was to assess the functional role of peptidase neurolysin (Nln) in the brain after ischemic stroke. Nln is known to inactivate bradykinin, substance P, neurotensin, and angiotensin II, which are cerebrotoxic in the ischemic brain, and to generate angiotensin-(1-7) and Met/Leu-enkephalins, which are cerebroprotective/restorative peptides. To study the functional significance of Nln upregulation in the post-stroke brain we utilized a specific inhibitor of Nln, Agaricoglyceride A (AgaA), in a mouse MCAO model of stroke. Administration of AgaA (10 and 50 mg/kg, i.p.) to mice 1 h after reperfusion (1 h occlusion) aggravated stroke injury measured by increased infarct and edema volume (p < 0.01) and neurological deficit (p < 0.01), in a dose-dependent manner at 24 h after stroke. In this setting, AgaA resulted in a dose-dependent inhibition of Nln in the ischemic but not in the contralateral hemisphere, which, based on preliminary experiments, was also accompanied by increased levels of Nln substrate neuropeptides. In a reverse approach, we developed an adeno-associated virus serotype 2/5 vector encoding mouse Nln driven by cytomegalovirus enhancer/chicken β-actin hybrid (CAG) promoter (AAV2/5-CAG-Nln) to overexpress Nln in the mouse brain prior to stroke. Applicability of AAV2/5-CAG-Nln to transduce catalytically active Nln was confirmed in mouse primary cortical neurons and in mice. In the later experiment, overexpression of Nln in the mouse brain was also accompanied by decreased levels of Nln substrate neuropeptides. Two weeks after
in vivo
transduction using the AAV5-CAG-Nln, or a control AAV5-CAG-eGFP vector (intrastriatal administration; 1.5 x 10
11
genome copies) mice were subjected to MCAO (1 h occlusion followed by 72 h reperfusion). The results of these experiments revealed that abundance of Nln in the brain protects animals from stroke injury measured by reduced infarct and edema volume (p < 0.01 and 0.05, respectively), and improved neurological deficit (p < 0.05). Based on these observations and the knowledge about endogenous substrates of Nln, we view this peptidase as one of brain’s self-protective mechanisms directed towards preservation and recovery of brain after stroke.
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Abstract
H2S is an endogenous gasotransmitter that plays an important role in physiological conditions. In this issue, Das et al. provide evidence that SIRT1-dependent angiogenesis is augmented by H2S-findings reinforced by Longchamp et al., who demonstrate that H2S-dependent angiogenesis is triggered by amino acid deprivation.
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Affiliation(s)
- Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, MD9, 2 Medical Drive, Singapore 117593, Singapore; School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Brian K Kennedy
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, MD9, 2 Medical Drive, Singapore 117593, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, MD7, 8 Medical Drive, Singapore 117596, Singapore; Buck Institute for Research on Aging, Novato, CA 94945, USA.
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50
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Poh L, Kang SW, Baik SH, Ng GYQ, She DT, Balaganapathy P, Dheen ST, Magnus T, Gelderblom M, Sobey CG, Koo EH, Fann DY, Arumugam TV. Evidence that NLRC4 inflammasome mediates apoptotic and pyroptotic microglial death following ischemic stroke. Brain Behav Immun 2019; 75:34-47. [PMID: 30195027 DOI: 10.1016/j.bbi.2018.09.001] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/31/2018] [Accepted: 09/03/2018] [Indexed: 12/20/2022] Open
Abstract
Stroke is the second leading cause of death in the world and a major cause of long-term disability. Recent evidence has provided insight into a newly described inflammatory mechanism that contributes to neuronal and glial cell death, and impaired neurological outcome following ischemic stroke - a form of sterile inflammation involving innate immune complexes termed inflammasomes. It has been established that inflammasome activation following ischemic stroke contributes to neuronal cell death, but little is known about inflammasome function and cell death in activated microglial cells following cerebral ischemia. Microglia are considered the resident immune cells that function as the primary immune defense in the brain. This study has comprehensively investigated the expression and activation of NLRP1, NLRP3, NLRC4 and AIM2 inflammasomes in isolates of microglial cells subjected to simulated ischemic conditions and in the brain following ischemic stroke. Immunoblot analysis from culture media indicated microglial cells release inflammasome components and inflammasome activation-dependent pro-inflammatory cytokines following ischemic conditions. In addition, a functional role for NLRC4 inflammasomes was determined using siRNA knockdown of NLRC4 and pharmacological inhibitors of caspase-1 and -8 to target apoptotic and pyroptotic cell death in BV2 microglial cells under ischemic conditions. In summary, the present study provides evidence that the NLRC4 inflammasome complex mediates the inflammatory response, as well as apoptotic and pyroptotic cell death in microglial cells under in vitro and in vivo ischemic conditions.
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Affiliation(s)
- Luting Poh
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Sung-Wook Kang
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Sang-Ha Baik
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Gavin Yong Quan Ng
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - David T She
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - Priyanka Balaganapathy
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore
| | - S Thameem Dheen
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Tim Magnus
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Germany
| | - Mathias Gelderblom
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Germany
| | - Christopher G Sobey
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Edward H Koo
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University Health System, Singapore, Singapore
| | - David Y Fann
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore.
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School Medicine, National University of Singapore, Singapore; School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea; Neurobiology/Ageing Programme, Life Sciences Institute, National University of Singapore, Singapore.
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