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Jia R, Solé-Guardia G, Kiliaan AJ. Blood-brain barrier pathology in cerebral small vessel disease. Neural Regen Res 2024; 19:1233-1240. [PMID: 37905869 DOI: 10.4103/1673-5374.385864] [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] [Received: 05/31/2023] [Accepted: 08/22/2023] [Indexed: 11/02/2023] Open
Abstract
ABSTRACT Cerebral small vessel disease is a neurological disease that affects the brain microvasculature and which is commonly observed among the elderly. Although at first it was considered innocuous, small vessel disease is nowadays regarded as one of the major vascular causes of dementia. Radiological signs of small vessel disease include small subcortical infarcts, white matter magnetic resonance imaging hyperintensities, lacunes, enlarged perivascular spaces, cerebral microbleeds, and brain atrophy; however, great heterogeneity in clinical symptoms is observed in small vessel disease patients. The pathophysiology of these lesions has been linked to multiple processes, such as hypoperfusion, defective cerebrovascular reactivity, and blood-brain barrier dysfunction. Notably, studies on small vessel disease suggest that blood-brain barrier dysfunction is among the earliest mechanisms in small vessel disease and might contribute to the development of the hallmarks of small vessel disease. Therefore, the purpose of this review is to provide a new foundation in the study of small vessel disease pathology. First, we discuss the main structural domains and functions of the blood-brain barrier. Secondly, we review the most recent evidence on blood-brain barrier dysfunction linked to small vessel disease. Finally, we conclude with a discussion on future perspectives and propose potential treatment targets and interventions.
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Affiliation(s)
- Ruxue Jia
- Department of Medical Imaging, Anatomy, Radboud University Medical Center, Donders Institute for Brain, Cognition & Behavior, Center for Medical Neuroscience, Preclinical Imaging Center PRIME, Radboud Alzheimer Center, Nijmegen, the Netherlands
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Yan L, Han X, Zhang M, Kou H, Liu H, Cheng T. Melatonin exerts neuroprotective effects in mice with spinal cord injury by activating the Nrf2/Keap1 signaling pathway via the MT2 receptor. Exp Ther Med 2024; 27:37. [PMID: 38125360 PMCID: PMC10731399 DOI: 10.3892/etm.2023.12325] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/21/2023] [Indexed: 12/23/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating event that often leads to severe disability, and effective treatments for SCI are currently limited. The present study investigated the potential effects and specific mechanisms of melatonin treatment in SCI. Mice were divided into Sham (Sham), Vehicle (Veh), Melatonin (Mel), and Melatonin + 4-phenyl-2-propionamidotetralin (4P-PDOT) (Mel + 4PP) groups based on randomized allocation. The expression of MT2 and the nuclear factor-erythroid 2-related factor 2 (Nrf2)/Keap1 signaling pathways were examined, along with oxidative stress indicators, inflammatory factors and GFAP-positive cells near the injury site. The polarization of microglial cells in different inflammatory microenvironments was also observed. Cell survival, motor function recovery and spinal cord tissue morphology were assessed using staining and Basso Mouse Scale scores. On day 7 after SCI, the results revealed that melatonin treatment increased MT2 protein expression and activated the Nrf2/Keap1 signaling pathway. It also reduced GFAP-positive cells, mitigated oxidative stress, and suppressed inflammatory responses around the injury site. Furthermore, melatonin treatment promoted the polarization of microglia toward the M2 type, increased the number of neutrophil-positive cells, and modulated the transcription of Bax and Bcl2 in the injured spinal cord. Melatonin treatment alleviated the severity of spinal injuries and facilitated functional recovery in mice with SCI. Notably, blocking MT2 with 4P-PDOT partially reversed the neuroprotective effects of melatonin in SCI, indicating that the activation of the MT2/Nrf2/Keap1 signaling pathway contributes to the neuroprotective properties of melatonin in SCI. The therapeutic and translational potentials of melatonin in SCI warrant further investigation.
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Affiliation(s)
- Liyan Yan
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Xiaonan Han
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Mingkang Zhang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Hongwei Kou
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Hongjian Liu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Tian Cheng
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
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Zou Y, Tang S, Li H, Lu F, Shao L. Analysis of cerebrospinal fluid metabolites affected by WenDanTang based on ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry. J Sep Sci 2024; 47:e2300201. [PMID: 38286733 DOI: 10.1002/jssc.202300201] [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: 03/28/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 01/31/2024]
Abstract
WenDanTang (WDT) is a Chinese herbal formula used to treat various diseases, including neurodegenerative diseases. However, the neuroprotective metabolic pathways and the components involved in this process are not fully understood. In this study, we examined the neuroprotective metabolic pathways of WDT in rat brains using cerebrospinal fluid metabolomics and ultra-high-performance liquid chromatography-high-resolution mass spectrometry. Twelve rats were randomly divided into a WDT (administrated with WDT solution) and a control group. The ultra-high-performance liquid chromatography technique was used to explore the components of the WDT solution and cerebrospinal fluid, and secondary mass spectra of cerebrospinal fluid were used to identify possible brain-incorporating components after WDT. The results of the differential metabolism analysis showed that eight metabolites were typically altered (all p < 0.05). By comparing the secondary mass spectra of the cerebrospinal fluid of rats and WDT solution, two possible brain-incorporating components of WDT, stachydrine and α-methoxyphenylacetic acid, were identified. The data also suggested that WDT affects nucleotide metabolism, glutathione metabolism, and B-vitamin metabolic pathways, the central differential metabolic pathways. These data suggest that WDT protects neurons through its active components, such as stachydrine, and regulates biochemical metabolism to affect the brain's energy metabolism and antioxidant capacity.
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Affiliation(s)
- Yun Zou
- Tianjin Key Laboratory of Modern Chinese Medicine Theory of Innovation and Application, College of Traditional Chinese Medicine, TianJin University of Traditional Chinese Medicine, Tianjin, P. R. China
| | - Saixue Tang
- Teaching and Research Section of TCM Internal Medicine, First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, P. R. China
| | - Haozhi Li
- Tianjin Key Laboratory of Modern Chinese Medicine Theory of Innovation and Application, College of Traditional Chinese Medicine, TianJin University of Traditional Chinese Medicine, Tianjin, P. R. China
| | - Feilong Lu
- Institute of TCM Clinical Basic Medicine, College of Basic Medical Science, Zhejiang Chinese Medicine University, Hangzhou, P. R. China
| | - Linlin Shao
- Tianjin Key Laboratory of Modern Chinese Medicine Theory of Innovation and Application, College of Traditional Chinese Medicine, TianJin University of Traditional Chinese Medicine, Tianjin, P. R. China
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Wendlandt M, Kürten AJ, Beiersdorfer A, Schubert C, Samad-Yazdtchi K, Sauer J, Pinto MC, Schulz K, Friese MA, Gee CE, Hirnet D, Lohr C. A 2A adenosine receptor-driven cAMP signaling in olfactory bulb astrocytes is unaffected in experimental autoimmune encephalomyelitis. Front Immunol 2023; 14:1273837. [PMID: 38077336 PMCID: PMC10701430 DOI: 10.3389/fimmu.2023.1273837] [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: 08/07/2023] [Accepted: 11/06/2023] [Indexed: 12/18/2023] Open
Abstract
Introduction The cyclic nucleotide cyclic adenosine monophosphate (cAMP) is a ubiquitous second messenger, which is known to play an important anti-inflammatory role. Astrocytes in the central nervous system (CNS) can modulate inflammation but little is known about the significance of cAMP in their function. Methods We investigated cAMP dynamics in mouse olfactory bulb astrocytes in brain slices prepared from healthy and experimental autoimmune encephalomyelitis (EAE) mice. Results The purinergic receptor ligands adenosine and adenosine triphosphate (ATP) both induced transient increases in cAMP in astrocytes expressing the genetically encoded cAMP sensor Flamindo2. The A2A receptor antagonist ZM241385 inhibited the responses. Similar transient increases in astrocytic cAMP occurred when olfactory receptor neurons were stimulated electrically, resulting in ATP release from the stimulated axons that increased cAMP, again via A2A receptors. Notably, A2A-mediated responses to ATP and adenosine were not different in EAE mice as compared to healthy mice. Discussion Our results indicate that ATP, synaptically released by afferent axons in the olfactory bulb, is degraded to adenosine that acts on A2A receptors in astrocytes, thereby increasing the cytosolic cAMP concentration. However, this pathway is not altered in the olfactory bulb of EAE mice.
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Affiliation(s)
- Marina Wendlandt
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
| | - Alina J. Kürten
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
| | | | - Charlotte Schubert
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Jessica Sauer
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
| | - M. Carolina Pinto
- Institute of Synaptic Physiology, Center for Molecular Neurobiology Hamburg, Hamburg, Germany
| | - Kristina Schulz
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
| | - Manuel A. Friese
- Institute of Neuroimmunology and Multiple Sclerosis (INIMS), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christine E. Gee
- Institute of Synaptic Physiology, Center for Molecular Neurobiology Hamburg, Hamburg, Germany
| | - Daniela Hirnet
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
| | - Christian Lohr
- Division of Neurophysiology, University of Hamburg, Hamburg, Germany
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Shi G, Li M, E Y, Wang M, Gong P, Wang X, Lu J, Wu W, Xue S, Zhou J, Zhou R. Prognostic performance of serum YKL-40 for one-year clinical outcomes in acute ischemic stroke. Aging (Albany NY) 2023; 15:1199-1209. [PMID: 36880855 PMCID: PMC10008488 DOI: 10.18632/aging.204553] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 02/20/2023] [Indexed: 02/27/2023]
Abstract
BACKGROUND Effects of YKL-40 on one-year clinical outcomes including poor clinical outcome, all-cause mortality, and stroke recurrence among acute ischemic stroke (AIS) patients remained elusive. The purpose of this study was to explore the association between serum YKL-40 at admission and one-year clinical outcomes in AIS patients. METHODS In this prospective cohort study, a total of 1002 participants out of 1361 AIS patients from two centers were included for current analysis. Serum YKL-40 concentrations were measured via enzyme-linked immunosorbent assay. Multivariable logistic or Cox regression were performed to explore the independent association of YKL-40 with one-year clinical outcomes, including poor outcome (modified Rankin Scale of 3-6), all-cause mortality, and recurrent stroke. C-statistic, net reclassification index (NRI) and integrated discrimination improvement (IDI) were calculated to evaluate the discriminatory and predictive power of YKL-40 when added to conventional model. RESULTS Compared with the first quartile of YKL-40, the adjusted odds ratios or hazard ratios with 95% confidence intervals of the fourth quartile were 3.032 (1.627-5.650) for poor outcome, 2.886 (1.320-6.308) for all-cause mortality and 1.694 (0.906-3.169) for recurrent stroke. The addition of serum YKL-40 to conventional model significantly improved reclassification for poor outcome (NRI 0.053, P = 0.031; IDI 0.018, P = 0.001) and all-cause mortality (NRI 0.162, P = 0.036). CONCLUSIONS Elevated serum YKL-40 at admission might be independently associated with one-year poor outcome and all-cause mortality but not stroke recurrence among Chinese AIS patients.
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Affiliation(s)
- Guomei Shi
- Department of Neurology, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China.,Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Minghao Li
- Department of Vascular Surgery, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China
| | - Yan E
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210001, Jiangsu Province, China
| | - Meng Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210001, Jiangsu Province, China
| | - Pengyu Gong
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210001, Jiangsu Province, China
| | - Xiaorong Wang
- Department of Neurology, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China
| | - Jingye Lu
- Department of Neurology, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China.,Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Weixiang Wu
- Department of Neurology, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China
| | - Shouru Xue
- Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Junshan Zhou
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210001, Jiangsu Province, China
| | - Rujuan Zhou
- Department of Neurology, The Taixing People’s Hospital, Taixing 225400, Jiangsu Province, China
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Shi G, Ke D, Gong P, Yu P, Zhou J, Wang M, Zhang X, Wang X, Guo M, Xu M, Zhou R. Serum YKL-40 Levels and White Matter Hyperintensities in Patients with Acute Ischemic Stroke. J Inflamm Res 2023; 16:311-319. [PMID: 36721527 PMCID: PMC9884433 DOI: 10.2147/jir.s398701] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 11/22/2022] [Accepted: 01/18/2023] [Indexed: 01/25/2023] Open
Abstract
Background White matter hyperintensity (WMH) is associated with risk of acute ischemic stroke (AIS) and poor outcomes after AIS. The purpose of this prospective study was to evaluate the association between serum YKL-40 levels and WMH burden in patients with AIS. Methods From February 2020 to March 2021, a total of 672 consecutive AIS patients with magnetic resonance imaging data were prospectively recruited form two centers. Serum YKL-40 levels were quantified using enzyme-linked immunosorbent assay. The burden of WMH was semiquantitatively measured by the Fazekas visual grading scale. According to severity of overall WMH, patients were dichotomized into none-mild WMH group (Fazekas score 0-2) or moderate-severe WMH group (Fazekas score 3-6). Besides, based on severity of periventricular WMH (PV-WMH) and deep WMH (D-WMH), patients were categorized as none-mild (Fazekas score 0-1) or moderate-severe (Fazekas score 2-3). Results Among the 672 patients, 335 (49.9%) participants were identified with moderate-severe overall WMH, 326 (48.5%) with moderate-severe PV-WMH and 262 (39.0%) with moderate-severe D-WMH. Compared with the first quartile of serum YKL-40, the adjusted odds ratio (OR) of the fourth quartile for moderate-severe PV-WMH was 2.473 (95% confidence interval [CI] 1.316-4.646; P=0.005). No significant association was observed between YKL-40 and overall WMH (OR 0.762; 95% CI 0.434-1.336; P=0.343) or D-WMH (OR 0.695; 95% CI 0.413-1.171; P=0.172). Conclusion Our results suggested that higher YKL-40 levels appeared to be associated with PV-WMH, but not with overall WMH or D-WMH in patients with AIS.
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Affiliation(s)
- Guomei Shi
- Department of Neurology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Dongdong Ke
- Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Department of Rehabilitation, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Pengyu Gong
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, People’s Republic of China,Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Peng Yu
- Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Department of Radiology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Junshan Zhou
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Meng Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Xiaohao Zhang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, People’s Republic of China
| | - Xiaorong Wang
- Department of Neurology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Minwang Guo
- Department of Neurology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Mingyang Xu
- Department of Neurology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China
| | - Rujuan Zhou
- Department of Neurology, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Stroke Center, the Taixing People’s Hospital, Taixing, Jiangsu, People’s Republic of China,Correspondence: Rujuan Zhou, Tel +86-13951158499, Email
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