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Thus, various reactive persulfides and polysulfides appear to be present in the eye, and some reactive sulfide species, which have a protective effect against oxidative stress, are upregulated in the aqueous and vitreous humors of DM eyes

It has been shown that upregulated MMPs in activated astrocytes in the ONH degrade the extracellular matrix (ECM) after retinal I/R injury in mice.[53] As a consequence the ECM is remodeled and degeneration of the lamina cribrosa occurs, which predisposes the RGCs towards compression[54, 55] and can cause further vascular dysregulation.[56] Indeed, we previously showed that the thickness of the lamina cribrosa, which indicates its degeneration, was related to BF in the ONH in glaucoma.[57] Astrocytes also release endothelin, which acts as a strong inducer of vasoconstriction[50] and prevents axonal transportation in the RGCs.[58] Furthermore, although NO in the astrocytes does not itself damage RGCs, it can be converted into the form of peroxynitrite (ONOO - )

This approach is consistent with PRISMA-ScR guidance and updated methodological recommendations for scoping reviews, which support expanding data sources when mapping rapidly evolving scientific domains ( 2.2 Eligibility criteria For this review, drug-tolerant persistent (DTP) cells are defined as a subset of cancer cells that survive exposure to therapeutic agents without developing stable genetic resistance

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