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Wang X, Tan S, Yang S, Liu X, Lei J, Li H. Activation of Sonic Hedgehog Signaling Pathway Regulates Human Trabecular Meshwork Cell Function. J Ocul Pharmacol Ther 2023; 39:430-438. [PMID: 37307020 DOI: 10.1089/jop.2023.0022] [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] [Indexed: 06/13/2023] Open
Abstract
Purpose: To investigate the effects of Sonic hedgehog (Shh) signaling on primary human trabecular meshwork (HTM) cells. Methods: Primary HTM cells were isolated from healthy donors and cultured. Recombinant Shh (rShh) protein and cyclopamine were used to activate and inhibit the Shh signaling pathway, respectively. A cell viability assay was performed to assess the effects of rShh on the activity of primary HTM cells. Functional assessment of cell adhesion and phagocytosis was also performed. The proportion of apoptotic cells was examined using flow cytometry. Fibronectin (FN) and transforming growth factor beta2 (TGF-β2) protein were detected to assess the influence of rShh on the metabolism of the extracellular matrix (ECM). Real-time polymerase chain reaction (RT-PCR) and western blot analyses were used to examine mRNA and protein expression of Shh signaling pathway-associated factors GLI Family Zinc Finger 1 (GLI1) and Suppressor of Fused (SUFU). Results: rShh significantly enhanced primary HTM cell viability at a concentration of 0.5 μg/mL. rShh increased the adhesion and phagocytic abilities of primary HTM cells, and decreased cell apoptosis. FN and TGF-β2 protein expression increased in primary HTM cells treated with rShh. rShh upregulated the transcriptional activity and protein levels of GLI1, and downregulated those of SUFU. Correspondingly, the rShh-induced GLI1 upexpression was partially blocked by pretreatment with the Shh pathway inhibitor cyclopamine at a concentration of 10 μM. Conclusions: Activation of Shh signaling can regulate the function of primary HTM cells through GLI1. Regulation of Shh signaling may be a potential target for attenuating cell damage in glaucoma.
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Affiliation(s)
- Xiaochen Wang
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Sisi Tan
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Shuang Yang
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Xianmao Liu
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Junqin Lei
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Hong Li
- Department of Ophthalmology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Lab of Ophthalmology, Chongqing Eye Institute, Chongqing Branch of National Clinical Research Center for Ocular Diseases, Chongqing, China
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Samanta J, Silva HM, Lafaille JJ, Salzer JL. Transcriptomic analysis of loss of Gli1 in neural stem cells responding to demyelination in the mouse brain. Sci Data 2021; 8:278. [PMID: 34711861 PMCID: PMC8553940 DOI: 10.1038/s41597-021-01063-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 09/10/2021] [Indexed: 12/11/2022] Open
Abstract
In the adult mammalian brain, Gli1 expressing neural stem cells reside in the subventricular zone and their progeny are recruited to sites of demyelination in the white matter where they generate new oligodendrocytes, the myelin forming cells. Remarkably, genetic loss or pharmacologic inhibition of Gli1 enhances the efficacy of remyelination by these neural stem cells. To understand the molecular mechanisms involved, we performed a transcriptomic analysis of this Gli1-pool of neural stem cells. We compared murine NSCs with either intact or deficient Gli1 expression from adult mice on a control diet or on a cuprizone diet which induces widespread demyelination. These data will be a valuable resource for identifying therapeutic targets for enhancing remyelination in demyelinating diseases like multiple sclerosis.
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Affiliation(s)
- Jayshree Samanta
- Department of Neuroscience and Physiology, Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA.
- Stem Cell and Regenerative Medicine Center, Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, 53706, USA.
| | - Hernandez Moura Silva
- The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York, 10016, USA
| | - Juan J Lafaille
- The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York, 10016, USA
| | - James L Salzer
- Department of Neuroscience and Physiology, Neuroscience Institute, New York University School of Medicine, New York, NY, 10016, USA.
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Fujisawa Y, Matsuda K, Uehara T. Osteopontin enhances the migration of lung fibroblasts via upregulation of interleukin-6 through the extracellular signal-regulated kinase (ERK) pathway. Biol Chem 2021; 401:1071-1080. [PMID: 32924371 DOI: 10.1515/hsz-2020-0125] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022]
Abstract
Fibrosis is a phenomenon in which parenchyma is replaced with fibrous tissue. Persistent inflammation accompanied by dysregulation of cytokine production and repeated cycles of inflammation-associated tissue-repair induces fibrosis in various organs including the liver, lung, and kidney. In idiopathic pulmonary fibrosis, production of interleukin (IL)-6 and osteopontin (OPN) are dysregulated. Fibrosis leads to qualitative rather than quantitative changes of fibroblasts at the sites of tissue repair, and this leads to enlargement of fibrotic foci. These fibroblasts are immunohistochemically positive for OPN; however, the effect of overexpressed OPN in fibroblasts is not fully understood yet. In this study, we investigated the effect of OPN on IL-6 secretion and on migration and proliferation of fibroblasts. Lung fibroblasts overexpressing exogenous OPN showed that OPN was linked to the enhancement of cell migration through increased IL-6 secretion via the extracellular signal-regulated kinase (ERK) pathway. These results suggest that OPN may exert its pro-fibrotic functions, such as enhancement of fibroblasts migration by cooperating with chemoattractant IL-6, and may be involved in enlargement of fibrotic foci.
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Affiliation(s)
- Yu Fujisawa
- Department of Health and Medical Sciences, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-28621, Nagano, Japan
| | - Kazuyuki Matsuda
- Department of Health and Medical Sciences, Graduate School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, 390-28621, Nagano, Japan
| | - Takeshi Uehara
- Department of Laboratory Medicine, Shinshu University Hospital, 3-1-1 Asahi, Matsumoto, 390-8621, Nagano, Japan
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