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Hydrogen sulfide: Therapeutic or injurious in ischemic stroke?

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Presentation on theme: "Hydrogen sulfide: Therapeutic or injurious in ischemic stroke?"— Presentation transcript:

1 Hydrogen sulfide: Therapeutic or injurious in ischemic stroke?
Priya Gopalakrishnan, B. Shrestha, A.M. Kaskas, J. Green, J.S. Alexander, C.B. Pattillo  Pathophysiology  Volume 26, Issue 1, Pages 1-10 (March 2019) DOI: /j.pathophys Copyright © Terms and Conditions

2 Fig. 1 Graphical representation depicting H2S biosynthesis and degradation. H2S biosynthesis pathways of three major cytosolic enzymes involved in endogenous H2S production: cystathionine β synthase (CBS), cystathionine γ lyase (CSE) and 3-mercaptosulfur transferase (3-MST) have been detailed in the cytosol and mitochondria. Degradation of H2S by three mitochondrial enzymes: quinone reductase (SQR), sulfur dioxygenase (SDO, ETHE1), and thiosulfate sulfurtransferase (TST) is shown within the mitochondria. Pathophysiology  , 1-10DOI: ( /j.pathophys ) Copyright © Terms and Conditions

3 Fig. 2 Interactions between astrocytes and neurons for GSH and H2S handling. Astrocytes take up excess glutamate surrounding the neurons and provide a cysteine source for neuronal GSH production, both preventing neuronal excitotoxicity. Increased activity of Xc− antiporters as seen in mature neurons can heighten neuronal toxicity by H2S mediated cell death with excess glutamate by activating protease release. Pathophysiology  , 1-10DOI: ( /j.pathophys ) Copyright © Terms and Conditions

4 Fig. 3 H2S-dependent signal transduction affecting stroke related events such as edema and inflammation with associated cellular events - apoptosis and gene transcription, and important stroke mediators including NfKB, Nrf2, Akt and caspase pathway. Pathophysiology  , 1-10DOI: ( /j.pathophys ) Copyright © Terms and Conditions


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