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- W2023378519 abstract "Purpose.: To investigate the role of mitochondrial permeability transition pore (MPTP) and effect of cyclosporin A (CsA) on inflammatory apoptosis of human conjunctival epithelial cells (IOBA-NHC) and T cells. Methods.: IOBA-NHC and Jurkat cells were stimulated with IFNγ, TNFα, αFas, or PMA/αCD3, in the presence or absence of CsA. MPTP was determined using the calcein-cobalt technique. Mitochondrial membrane potential (ΔΨm) was measured with JC-1. Apoptosis was quantified by Annexin V/PI staining. Apoptosis mediators were evaluated by flow cytometry or Western blot. Results.: In IOBA-NHC, TNFα, and IFNγ induced MPTP opening, ΔΨm loss, and increased cell apoptosis. This was accompanied by upregulation of Fas/FasL; Bax; and caspase-3, -8, and -9 activation. Addition of CsA prevented IOBA-NHC from cell death by blocking MPTP opening, ΔΨm loss, Fas/FasL, and caspase activation. In PMA/αCD3-activated Jurkat T cells, MPTP opening and ΔΨm loss were increased along with cell apoptosis and upregulated Fas/FasL/caspase expressions. CsA further promoted T-cell apoptosis, ΔΨm loss, and upregulation of Fas/FasL/caspase. Conclusions.: Inflammation induces aberrant MPTP opening, resulting in an increased apoptosis in conjunctival epithelial cells. CsA protected IOBA-NHC from cell death by blocking both intrinsic and extrinsic apoptosis pathways. CsA promoted T-cell apoptosis via upregulating Fas/FasL and caspase activities with a minimal effect on MPTP. The findings suggest that the differential effect of CsA on T cells versus ocular surface resident epithelial cells may contribute to its therapeutic efficacy in treating ocular inflammation such as dry eye disease." @default.
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- W2023378519 date "2013-07-16" @default.
- W2023378519 modified "2023-10-16" @default.
- W2023378519 title "Mitochondrial Permeability Transition Pore in Inflammatory Apoptosis of Human Conjunctival Epithelial Cells and T Cells: Effect of Cyclosporin A" @default.
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- W2023378519 doi "https://doi.org/10.1167/iovs.13-11681" @default.
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