tissue hypoxia

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Tissue Hypoxia: Cell Swells – 1 st sign [ No ATP No Na/K ATPas ] [Na/water enters cell excess] Irreversible Cell injury dt: Hypoxia: How Damage to Cell Membrane: o Free Radicals Lipid Peroxidation [reverse w. Vitamin E !!] o Calcium activates Cell Mem. Phospholipase [bad] Lipid Peroxidation Calcium Enters Mitochondria: Electron Dense Deposits = destroys mitoch. Mitochondria damage: Caspases released [bad] Case: Acetaminophen – [converted by Liver P450 into FR….acts on Sulfhydryl groups in hepatocyte cell membranes] MCC: Fulminant Liver Necrosis Antidote: N-Acetylcysteine ……MoA: Replenish GSH [Glutathione inactivates FR] [GSH made by HMP shunt]

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Page 1: Tissue Hypoxia

Tissue Hypoxia: Cell Swells – 1st sign [ No ATP No Na/K ATPas] [Na/water enters cell excess]

Irreversible Cell injury dt: Hypoxia: HowDamage to Cell Membrane:

o Free Radicals Lipid Peroxidation [reverse w. Vitamin E!!]o Calcium activates Cell Mem. Phospholipase [bad] Lipid Peroxidation

Calcium Enters Mitochondria: Electron Dense Deposits = destroys mitoch.Mitochondria damage: Caspases released [bad]

Case: Acetaminophen – [converted by Liver P450 into FR….acts on Sulfhydryl groups in hepatocyte cell membranes] MCC: Fulminant Liver Necrosis

Antidote: N-Acetylcysteine……MoA: Replenish GSH [Glutathione – inactivates FR] [GSH made by HMP shunt]