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Zhu W, Zhang X, Wu S, Wang N, Kuehn MH. iPSCs-Based Therapy for Trabecular Meshwork. Handb Exp Pharmacol 2023; 281:277-300. [PMID: 37495850 DOI: 10.1007/164_2023_671] [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] [Indexed: 07/28/2023]
Abstract
The trabecular meshwork (TM) of the eye serves as an essential tissue in controlling aqueous humor (AH) outflow and intraocular pressure (IOP) homeostasis. However, dysfunctional TM cells and/or decreased TM cellularity is become a critical pathogenic cause for primary open-angle glaucoma (POAG). Consequently, it is particularly valuable to investigate TM characteristics, which, in turn, facilitates the development of new treatments for POAG. Since 2006, the advancement in induced pluripotent stem cells (iPSCs) provides a new tool to (1) model the TM in vitro and (2) regenerate degenerative TM in POAG. In this context, we first summarize the current approaches to induce the differentiation of TM-like cells from iPSCs and compare iPSC-derived TM models to the conventional in vitro TM models. The efficacy of iPSC-derived TM cells for TM regeneration in POAG models is also discussed. Through these approaches, iPSCs are becoming essential tools in glaucoma modeling and for developing personalized treatments for TM regeneration.
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Affiliation(s)
- Wei Zhu
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China.
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University & Capital Medical University, Beijing, China.
| | - Xiaoyan Zhang
- Department of Pharmacology, School of Pharmacy, Qingdao University, Qingdao, China
| | - Shen Wu
- Beijing Institute of Ophthalmology, Beijing Tongren Hospital Eye Center, Capital Medical University, Beijing, China
| | - Ningli Wang
- Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University & Capital Medical University, Beijing, China
- Beijing Institute of Ophthalmology, Beijing Tongren Hospital Eye Center, Capital Medical University, Beijing, China
| | - Markus H Kuehn
- Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, IA, USA
- Center for the Prevention and Treatment of Visual Loss, Iowa City Veterans Affairs Medical Center, Iowa City, IA, USA
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Li HL, Shan SW, Stamer WD, Li KK, Chan HHL, Civan MM, To CH, Lam TC, Do CW. Mechanistic Effects of Baicalein on Aqueous Humor Drainage and Intraocular Pressure. Int J Mol Sci 2022; 23:ijms23137372. [PMID: 35806375 PMCID: PMC9266486 DOI: 10.3390/ijms23137372] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 06/27/2022] [Accepted: 06/29/2022] [Indexed: 02/06/2023] Open
Abstract
Elevated intraocular pressure (IOP) is a major risk factor for glaucoma that results from impeded fluid drainage. The increase in outflow resistance is caused by trabecular meshwork (TM) cell dysfunction and excessive extracellular matrix (ECM) deposition. Baicalein (Ba) is a natural flavonoid and has been shown to regulate cell contraction, fluid secretion, and ECM remodeling in various cell types, suggesting the potential significance of regulating outflow resistance and IOP. We demonstrated that Ba significantly lowered the IOP by about 5 mmHg in living mice. Consistent with that, Ba increased the outflow facility by up to 90% in enucleated mouse eyes. The effects of Ba on cell volume regulation and contractility were examined in primary human TM (hTM) cells. We found that Ba (1–100 µM) had no effect on cell volume under iso-osmotic conditions but inhibited the regulatory volume decrease (RVD) by up to 70% under hypotonic challenge. In addition, Ba relaxed hTM cells via reduced myosin light chain (MLC) phosphorylation. Using iTRAQ-based quantitative proteomics, 47 proteins were significantly regulated in hTM cells after a 3-h Ba treatment. Ba significantly increased the expression of cathepsin B by 1.51-fold and downregulated the expression of D-dopachrome decarboxylase and pre-B-cell leukemia transcription factor-interacting protein 1 with a fold-change of 0.58 and 0.40, respectively. We suggest that a Ba-mediated increase in outflow facility is triggered by cell relaxation via MLC phosphorylation along with inhibiting RVD in hTM cells. The Ba-mediated changes in protein expression support the notion of altered ECM homeostasis, potentially contributing to a reduction of outflow resistance and thereby IOP.
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Affiliation(s)
- Hoi-lam Li
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
| | - Sze Wan Shan
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong
- Research Centre for Chinese Medicine Innovation (RCMI), The Hong Kong Polytechnic University, Hong Kong
| | - W. Daniel Stamer
- Department of Ophthalmology, Duke University, Durham, NC 27708, USA;
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - King-kit Li
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
| | - Henry Ho-lung Chan
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong
- Research Centre for Chinese Medicine Innovation (RCMI), The Hong Kong Polytechnic University, Hong Kong
| | - Mortimer M. Civan
- Department of Physiology, University of Pennsylvania, Philadelphia, PA 19104, USA;
| | - Chi-ho To
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong
- Research Centre for Chinese Medicine Innovation (RCMI), The Hong Kong Polytechnic University, Hong Kong
| | - Thomas Chuen Lam
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong
- Research Centre for Chinese Medicine Innovation (RCMI), The Hong Kong Polytechnic University, Hong Kong
| | - Chi-wai Do
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong; (H.-l.L.); (S.W.S.); (K.-k.L.); (H.H.-l.C.); (C.-h.T.); (T.C.L.)
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong
- Research Centre for Chinese Medicine Innovation (RCMI), The Hong Kong Polytechnic University, Hong Kong
- Research Institute of Smart Ageing (RISA), The Hong Kong Polytechnic University, Hong Kong
- Correspondence:
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Munemasa T, Gao X, Melvin JE, Mukaibo T. Ano6 disruption impairs acinar cell regulatory volume decrease and protein secretion in murine submandibular salivary glands. J Cell Physiol 2020; 235:8533-8545. [PMID: 32329061 DOI: 10.1002/jcp.29697] [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: 02/05/2020] [Revised: 03/24/2020] [Accepted: 03/29/2020] [Indexed: 11/09/2022]
Abstract
The widely expressed Anoctamin 6 (Ano6) supports different Ca2+ -dependent functions, but little is known about its role in salivary glands. Mouse submandibular gland (SMG) acinar cells exhibited a robust regulatory volume decrease (RVD) following cell swelling that was reduced approximately 70% in Ano6-/- mice. Ca2+ -free conditions nearly eliminated the RVD response suggesting that Ano6 is an obligatory component of the cell volume-activated, Ca2+ -dependent RVD pathway in salivary gland acinar cells. Ex vivo agonist-stimulated secretion of water and ions was unaffected by Ano6 disruption under both isotonic and hypotonic conditions suggesting that Ano6 does not play a major role in fluid and electrolyte secretion. In contrast, the total amount of β-adrenergic-dependent protein secretion by the SMG was significantly reduced in Ano6-/- mice. Closer inspection of these latter results revealed that protein secretion was affected only in the female SMG by Ano6 disruption. These results indicate that Ano6 modulates the RVD response and protein secretion by salivary gland acinar cells.
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Affiliation(s)
- Takashi Munemasa
- Secretory Mechanisms and Dysfunctions Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland.,Division of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - Xin Gao
- Secretory Mechanisms and Dysfunctions Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - James E Melvin
- Secretory Mechanisms and Dysfunctions Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland
| | - Taro Mukaibo
- Secretory Mechanisms and Dysfunctions Section, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland.,Division of Oral Reconstruction and Rehabilitation, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
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Zhao J, Du X, Wang M, Yang P, Zhang J. Salidroside mitigates hydrogen peroxide-induced injury by enhancement of microRNA-27a in human trabecular meshwork cells. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:1758-1765. [PMID: 31062616 DOI: 10.1080/21691401.2019.1608222] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Salidroside (Sal) exerted widely pharmacological effects in multitudinous diseases had been certified. The actual study clarified the protective activity of Sal in H2O2-injured human trabecular meshwork (HTM) cells. HTM cells were disposed with H2O2 to construct an oxidative damage model in vitro. Then, Sal was utilized to administrate HTM cells, and cell viability, apoptosis, apoptosis-interrelated proteins and ROS production were appraised using CCK-8, flow cytometry, western blot and DCFH-DA staining. MiR-27a inhibitor and its control were transfected into HTM cells, and the influences of miR-27a inhibition in HTM cells stimulated with H2O2 and Sal were detected. PI3K/AKT and Wnt/β-catenin pathways were ultimately investigated to uncover the underlying mechanism. We found that H2O2 evoked HTM cells oxidative damage, as evidenced by repressing cell viability, inducing apoptosis, activating cleaved-caspase-3/-9 expression and increasing ROS production. Sal significantly lightened H2O2-evoked oxidative damage in HTM cells. Additionally, miR-27a was up-regulated by Sal, and miR-27a suppression significantly reversed the protective effect of Sal on H2O2-injured HTM cells. Finally, Sal activated PI3K/AKT and Wnt/β-catenin pathways through enhancement of miR-27a in H2O2-injured HTM cells. In conclusion, these discoveries suggested that Sal could protect HTM cells against H2O2-evoked oxidative damage by activating PI3K/AKT and Wnt/β-catenin pathways through enhancement of miR-27a. Highlights H2O2 evokes HTM cells oxidative damage; Sal relieves H2O2-induced oxidative damage in HTM cells; Sal enhances miR-27a expression in H2O2-injured HTM cells; Repressed miR-27a reverses the protective impacts of Sal on H2O2-injured HTM cells; Sal activates PI3K/AKT and Wnt/β-catenin pathways by increasing miR-27a.
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Affiliation(s)
- Jun Zhao
- a Department of Ophthalmology , Linyi People's Hospital , Linyi , China
| | - Xiujuan Du
- b Department of Ophthalmology, Eye Institute of Shandong University of Traditional Chinese Medicine , Affiliated Eye Hospital of Shandong University of TCM , Jinan , China
| | - Meng Wang
- a Department of Ophthalmology , Linyi People's Hospital , Linyi , China
| | | | - Juanmei Zhang
- a Department of Ophthalmology , Linyi People's Hospital , Linyi , China
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Sommer A, Düppe M, Baumecker L, Kordowski F, Büch J, Chico JF, Fritsch J, Schütze S, Adam D, Sperrhacke M, Bhakdi S, Reiss K. Extracellular sphingomyelinase activity impairs TNF-α-induced endothelial cell death via ADAM17 activation and TNF receptor 1 shedding. Oncotarget 2017; 8:72584-72596. [PMID: 29069811 PMCID: PMC5641154 DOI: 10.18632/oncotarget.19983] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 07/11/2017] [Indexed: 12/21/2022] Open
Abstract
ADAM17, a prominent member of the “Disintegrin and Metalloproteinase” (ADAM) family, is an important regulator of endothelial cell proliferation and cell survival. The protease controls vital cellular functions through cleavage of growth factors, cytokines and their receptors including transforming growth factor-alpha (TGF-α), tumor necrosis factor-alpha (TNF-α) and TNF-α receptor 1 (TNFR1). TNF-α is the major inducer of endothelial cell death in cardiovascular diseases. The latter are also characterized by elevated plasma and tissue levels of extracellular sphingomyelinase (SMase). Whether the SMase affects ADAM activity and thus endothelial cell function has not been addressed to date. Here, we analyzed the effect of SMase on ADAM17-mediated shedding in COS7 cells and in human umbilical vein endothelial cells (HUVECs). Exposure to SMase significantly increased ADAM17-mediated release of alkaline-phosphatase (AP)-tagged TGF-α in COS7 cells and shedding of endogenously expressed TNFR1 in HUVECs. We previously presented evidence that surface exposure of phosphatidylserine (PS) is pivotal for ADAM17 to exert sheddase function. We found that SMase treatment led to PS externalization in both cell types. Transient non-apoptotic PS exposure is often mediated by Ca2+-dependent phospholipid scramblases. Accordingly, the Ca2+-chelator EGTA markedly reduced the breakdown of phospholipid asymmetry and shedding of TGF-α and TNFR1. Moreover, sheddase activity was significantly diminished in the presence of the competing PS-headgroup OPLS. SMase-stimulated TNFR1 shedding strikingly diminished TNF-α-induced signalling cascades and endothelial cell death. Taken together, our data suggest that SMase activity might act as protective factor for endothelial cells in cardiovascular diseases.
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Affiliation(s)
- Anselm Sommer
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Marie Düppe
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Lena Baumecker
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Felix Kordowski
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Joscha Büch
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | | | - Jürgen Fritsch
- Institute of Immunology, University of Kiel, 24105 Kiel, Germany
| | - Stefan Schütze
- Institute of Immunology, University of Kiel, 24105 Kiel, Germany
| | - Dieter Adam
- Institute of Immunology, University of Kiel, 24105 Kiel, Germany
| | - Maria Sperrhacke
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Sucharit Bhakdi
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
| | - Karina Reiss
- Department of Dermatology, University of Kiel, 24105 Kiel, Germany
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