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Wang Y, Yu FX. Angiomotin family proteins in the Hippo signaling pathway. Bioessays 2024:e2400076. [PMID: 38760875 DOI: 10.1002/bies.202400076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/19/2024]
Abstract
The Motin family proteins (Motins) are a class of scaffolding proteins consisting of Angiomotin (AMOT), AMOT-like protein 1 (AMOTL1), and AMOT-like protein 2 (AMOTL2). Motins play a pivotal role in angiogenesis, tumorigenesis, and neurogenesis by modulating multiple cellular signaling pathways. Recent findings indicate that Motins are components of the Hippo pathway, a signaling cascade involved in development and cancer. This review discusses how Motins are integrated into the Hippo signaling network, as either upstream regulators or downstream effectors, to modulate cell proliferation and migration. The repression of YAP/TAZ by Motins contributes to growth inhibition, whereas subcellular localization of Motins and their interactions with actin fibers are critical in regulating cell migration. The net effect of Motins on cell proliferation and migration may contribute to their diverse biological functions.
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Affiliation(s)
- Yu Wang
- Institute of Pediatrics, Children's Hospital of Fudan University, International Co-laboratory of Medical Epigenetics and Metabolism, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Fa-Xing Yu
- Institute of Pediatrics, Children's Hospital of Fudan University, International Co-laboratory of Medical Epigenetics and Metabolism, State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
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2
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Pang Q, Tang Z, Luo L. The crosstalk between oncogenic signaling and ferroptosis in cancer. Crit Rev Oncol Hematol 2024; 197:104349. [PMID: 38626848 DOI: 10.1016/j.critrevonc.2024.104349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 03/13/2024] [Accepted: 04/10/2024] [Indexed: 04/19/2024] Open
Abstract
Ferroptosis, a novel form of cell death regulation, was identified in 2012. It is characterized by unique features that differentiate it from other types of cell death, including necrosis, apoptosis, autophagy, and pyroptosis. Ferroptosis is defined by an abundance of iron ions and lipid peroxidation, resulting in alterations in subcellular structures, an elevation in reactive oxygen species (ROS), a reduction in glutathione (GSH) levels, and an augmentation in Fe (II) cytokines. Ferroptosis, a regulated process, is controlled by an intricate network of signaling pathways, where multiple stimuli can either enhance or hinder the process. This review primarily examines the defensive mechanisms of ferroptosis and its interaction with the tumor microenvironment. The analysis focuses on the pathways that involve AMPK, p53, NF2, mTOR, System Xc-, Wnt, Hippo, Nrf2, and cGAS-STING. The text discusses the possibilities of employing a combination therapy that targets several pathways for the treatment of cancer. It emphasizes the necessity for additional study in this field.
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Affiliation(s)
- Qianghu Pang
- The First Clinical College, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Zhirou Tang
- The First Clinical College, Guangdong Medical University, Zhanjiang, Guangdong 524023, China
| | - Lianxiang Luo
- The Marine Biomedical Research Institute of Guangdong Zhanjiang,School of Ocean and Tropical Medicine. Guangdong Medical University, Zhanjiang, Guangdong 524023, China.
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3
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Ren SY, Xia Y, Yu B, Lei QJ, Hou PF, Guo S, Wu SL, Liu W, Yang SF, Jiang YB, Chen JF, Shen KF, Zhang CQ, Wang F, Yan M, Ren H, Yang N, Zhang J, Zhang K, Lin S, Li T, Yang QW, Xiao L, Hu ZX, Mei F. Growth hormone promotes myelin repair after chronic hypoxia via triggering pericyte-dependent angiogenesis. Neuron 2024:S0896-6273(24)00233-2. [PMID: 38653248 DOI: 10.1016/j.neuron.2024.03.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/26/2024] [Accepted: 03/27/2024] [Indexed: 04/25/2024]
Abstract
White matter injury (WMI) causes oligodendrocyte precursor cell (OPC) differentiation arrest and functional deficits, with no effective therapies to date. Here, we report increased expression of growth hormone (GH) in the hypoxic neonatal mouse brain, a model of WMI. GH treatment during or post hypoxic exposure rescues hypoxia-induced hypomyelination and promotes functional recovery in adolescent mice. Single-cell sequencing reveals that Ghr mRNA expression is highly enriched in vascular cells. Cell-lineage labeling and tracing identify the GHR-expressing vascular cells as a subpopulation of pericytes. These cells display tip-cell-like morphology with kinetic polarized filopodia revealed by two-photon live imaging and seemingly direct blood vessel branching and bridging. Gain-of-function and loss-of-function experiments indicate that GHR signaling in pericytes is sufficient to modulate angiogenesis in neonatal brains, which enhances OPC differentiation and myelination indirectly. These findings demonstrate that targeting GHR and/or downstream effectors may represent a promising therapeutic strategy for WMI.
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Affiliation(s)
- Shu-Yu Ren
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yu Xia
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Bin Yu
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China; Department of Neurosurgery, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Qi-Jing Lei
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Peng-Fei Hou
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Sheng Guo
- Department of Immunology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Shuang-Ling Wu
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Wei Liu
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Shao-Fan Yang
- Brain Research Center, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yi-Bin Jiang
- Department of Neurobiology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jing-Fei Chen
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Kai-Feng Shen
- Department of Neurosurgery, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Chun-Qing Zhang
- Department of Neurosurgery, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Fei Wang
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Mi Yan
- Department of Pediatrics, Daping Hospital, Third Military Medical University (Army Medical University), Chongqing 400000, China
| | - Hong Ren
- Department of Emergence, 5(th) People's Hospital of Chongqing, Chongqing 400062, China
| | - Nian Yang
- Department of Physiology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jun Zhang
- Department of Neurobiology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Kuan Zhang
- Brain Research Center, State Key Laboratory of Trauma and Chemical Poisoning, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Sen Lin
- Department of Neurology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Tao Li
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Qing-Wu Yang
- Department of Neurology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Lan Xiao
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Zhang-Xue Hu
- Department of Pediatrics, Daping Hospital, Third Military Medical University (Army Medical University), Chongqing 400000, China.
| | - Feng Mei
- Department of Histology and Embryology, Chongqing Key Laboratory of Brain Development and Cognition, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University (Army Medical University), Chongqing 400038, China.
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Shen T, Lin R, Hu C, Yu D, Ren C, Li T, Zhu M, Wan Z, Su T, Wu Y, Cai W, Yu J. Succinate-induced macrophage polarization and RBP4 secretion promote vascular sprouting in ocular neovascularization. J Neuroinflammation 2023; 20:308. [PMID: 38129891 PMCID: PMC10734053 DOI: 10.1186/s12974-023-02998-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023] Open
Abstract
Pathological neovascularization is a pivotal biological process in wet age-related macular degeneration (AMD), retinopathy of prematurity (ROP) and proliferative diabetic retinopathy (PDR), in which macrophages (Mφs) play a key role. Tip cell specialization is critical in angiogenesis; however, its interconnection with the surrounding immune environment remains unclear. Succinate is an intermediate in the tricarboxylic acid (TCA) cycle and was significantly elevated in patients with wet AMD by metabolomics. Advanced experiments revealed that SUCNR1 expression in Mφ and M2 polarization was detected in abnormal vessels of choroidal neovascularization (CNV) and oxygen-induced retinopathy (OIR) models. Succinate-induced M2 polarization via SUCNR1, which facilitated vascular endothelial cell (EC) migration, invasion, and tubulation, thus promoting angiogenesis in pathological neovascularization. Furthermore, evidence indicated that succinate triggered the release of RBP4 from Mφs into the surroundings to regulate endothelial sprouting and pathological angiogenesis via VEGFR2, a marker of tip cell formation. In conclusion, our results suggest that succinate represents a novel class of vasculature-inducing factors that modulate Mφ polarization and the RBP4/VEGFR2 pathway to induce pathological angiogenic signaling through tip cell specialization.
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Affiliation(s)
- Tianyi Shen
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Ruoyi Lin
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Chengyu Hu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Donghui Yu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Chengda Ren
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Tingting Li
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Meijiang Zhu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Zhongqi Wan
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Tu Su
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China
| | - Yan Wu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China.
| | - Wenting Cai
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China.
| | - Jing Yu
- Department of Ophthalmology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200072, China.
- Department of Ophthalmology, The Third People's Hospital of Bengbu, Bengbu, China.
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Kobayashi S, Cox AG, Harvey KF, Hogan BM. Vasculature is getting Hip(po): Hippo signaling in vascular development and disease. Dev Cell 2023; 58:2627-2640. [PMID: 38052179 DOI: 10.1016/j.devcel.2023.11.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 05/29/2023] [Accepted: 11/01/2023] [Indexed: 12/07/2023]
Abstract
The Hippo signaling pathway regulates developmental organ growth, regeneration, and cell fate decisions. Although the role of the Hippo pathway, and its transcriptional effectors YAP and TAZ, has been well documented in many cell types and species, only recently have the roles for this pathway come to light in vascular development and disease. Experiments in mice, zebrafish, and in vitro have uncovered roles for the Hippo pathway, YAP, and TAZ in vasculogenesis, angiogenesis, and lymphangiogenesis. In addition, the Hippo pathway has been implicated in vascular cancers and cardiovascular diseases, thus identifying it as a potential therapeutic target for the treatment of these conditions. However, despite recent advances, Hippo's role in the vasculature is still underappreciated compared with its role in epithelial tissues. In this review, we appraise our current understanding of the Hippo pathway in blood and lymphatic vessel development and highlight the current knowledge gaps and opportunities for further research.
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Affiliation(s)
- Sakurako Kobayashi
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, 305 Grattan St, Melbourne, VIC 3000, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Andrew G Cox
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, 305 Grattan St, Melbourne, VIC 3000, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3010, Australia; Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Kieran F Harvey
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, 305 Grattan St, Melbourne, VIC 3000, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3010, Australia; Department of Anatomy and Developmental Biology, Monash University, Clayton, VIC 3800, Australia
| | - Benjamin M Hogan
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, 305 Grattan St, Melbourne, VIC 3000, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3010, Australia; Department of Anatomy and Physiology, The University of Melbourne, Parkville, VIC 3010, Australia.
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Pérez-Gutiérrez L, Ferrara N. Biology and therapeutic targeting of vascular endothelial growth factor A. Nat Rev Mol Cell Biol 2023; 24:816-834. [PMID: 37491579 DOI: 10.1038/s41580-023-00631-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2023] [Indexed: 07/27/2023]
Abstract
The formation of new blood vessels, called angiogenesis, is an essential pathophysiological process in which several families of regulators have been implicated. Among these, vascular endothelial growth factor A (VEGFA; also known as VEGF) and its two tyrosine kinase receptors, VEGFR1 and VEGFR2, represent a key signalling pathway mediating physiological angiogenesis and are also major therapeutic targets. VEGFA is a member of the gene family that includes VEGFB, VEGFC, VEGFD and placental growth factor (PLGF). Three decades after its initial isolation and cloning, VEGFA is arguably the most extensively investigated signalling system in angiogenesis. Although many mediators of angiogenesis have been identified, including members of the FGF family, angiopoietins, TGFβ and sphingosine 1-phosphate, all current FDA-approved anti-angiogenic drugs target the VEGF pathway. Anti-VEGF agents are widely used in oncology and, in combination with chemotherapy or immunotherapy, are now the standard of care in multiple malignancies. Anti-VEGF drugs have also revolutionized the treatment of neovascular eye disorders such as age-related macular degeneration and ischaemic retinal disorders. In this Review, we emphasize the molecular, structural and cellular basis of VEGFA action as well as recent findings illustrating unexpected interactions with other pathways and provocative reports on the role of VEGFA in regenerative medicine. We also discuss clinical and translational aspects of VEGFA. Given the crucial role that VEGFA plays in regulating angiogenesis in health and disease, this molecule is largely the focus of this Review.
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Affiliation(s)
- Lorena Pérez-Gutiérrez
- Department of Pathology, University of California San Diego, La Jolla, CA, USA
- Department of Ophthalmology, University of California San Diego, La Jolla, CA, USA
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Napoleone Ferrara
- Department of Pathology, University of California San Diego, La Jolla, CA, USA.
- Department of Ophthalmology, University of California San Diego, La Jolla, CA, USA.
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA.
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Bai W, Ren JS, Xia M, Zhao Y, Ding JJ, Chen X, Jiang Q. Targeting FSCN1 with an oral small-molecule inhibitor for treating ocular neovascularization. J Transl Med 2023; 21:555. [PMID: 37596693 PMCID: PMC10436462 DOI: 10.1186/s12967-023-04225-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 05/25/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Ocular neovascularization is a leading cause of blindness and visual impairment. While intravitreal anti-VEGF agents can be effective, they do have several drawbacks, such as endophthalmitis and drug resistance. Additional studies are necessary to explore alternative therapeutic targets. METHODS Bioinformatics analysis and quantitative RT-PCR were used to detect and verify the FSCN1 expression levels in oxygen-induced retinopathy (OIR) and laser-induced choroidal neovascularization (CNV) mice model. Transwell, wound scratching, tube formation, three-dimensional bead sprouting assay, rhodamine-phalloidin staining, Isolectin B4 staining and immunofluorescent staining were conducted to detect the role of FSCN1 and its oral inhibitor NP-G2-044 in vivo and vitro. HPLC-MS/MS analysis, cell apoptosis assay, MTT assay, H&E and tunnel staining, visual electrophysiology testing, visual cliff test and light/dark transition test were conducted to assess the pharmacokinetic and security of NP-G2-044 in vivo and vitro. Co-Immunoprecipitation, qRT-PCR and western blot were conducted to reveal the mechanism of FSCN1 and NP-G2-044 mediated pathological ocular neovascularization. RESULTS We discovered that Fascin homologue 1 (FSCN1) is vital for angiogenesis both in vitro and in vivo, and that it is highly expressed in oxygen-induced retinopathy (OIR) and laser-induced choroidal neovascularization (CNV). We found that NP-G2-044, a small-molecule inhibitor of FSCN1 with oral activity, can impede the sprouting, migration, and filopodia formation of cultured endothelial cells. Oral NP-G2-044 can effectively and safely curb the development of OIR and CNV, and increase efficacy while overcoming anti-VEGF resistance in combination with intravitreal aflibercept (Eylea) injection. CONCLUSION Collectively, FSCN1 inhibition could serve as a promising therapeutic approach to block ocular neovascularization.
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Affiliation(s)
- Wen Bai
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Jun-Song Ren
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Min Xia
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Ya Zhao
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Jing-Juan Ding
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
| | - Xi Chen
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China
- Department of Ophthalmology, Northern Jiangsu People's Hospital, Yangzhou, China
| | - Qin Jiang
- The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
- The Fourth School of Clinical Medicine, Nanjing Medical University, Nanjing, China.
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Osthole Antagonizes Microglial Activation in an NRF2-Dependent Manner. Molecules 2023; 28:molecules28020507. [PMID: 36677566 PMCID: PMC9912252 DOI: 10.3390/molecules28020507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/27/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023] Open
Abstract
Microglia are neuroglia in the brain with an innate immune function and participate in the progress of neurodegenerative diseases. Osthole (OST) is a coumarin derivative extracted from Cnidium monnieri and bears a microglia-antagonizing ability. However, the underlying mechanism of the antagonism is not clear. The lipopolysaccharides-induced microglial BV2 cell line and amyloid-overexpressing fruit fly were used as models to study OST treatment. We found that OST treatment is sufficient to evoke NRF2 cascade under an LPS-induced inflammatory environment, and silencing NRF2 is sufficient to abolish the process. Moreover, we found that OST is sufficient to antagonize microglial activation in both LPS-induced BV2 cells and Aβ-overexpressing fruit flies, and silencing NRF2 abolishes OST's antagonism. Furthermore, OST treatment rescued survival, climbing, and the learning ability of Aβ-overexpressing fruit flies and relieved oxidative stress. In conclusion, we proved that OST antagonizes microglial activation induced by either LPS or Aβ and that NRF2 is necessary for OST's antagonism.
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