Cell injury

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Cell injury by Mind Map: Cell injury

1. causes

1.1. Genetic

1.1.1. in born errors of metabolism, DNA damage

1.2. Acquired

1.2.1. Hypoxia and ischemia

1.2.2. Infectious agents

1.2.3. Physical agents

1.2.4. Chemical agents

1.2.5. Immunological agents

1.2.6. Nutritional imbalance

2. in form of

2.1. Apoptosis

2.1.1. Physiological During embryogenesiss During lactation Involution of thymus gland Uterus aftrer delivery

2.1.2. Pathological Tumors exposed to chemotherapeutic agents. Graft rejection reactions, by cytotoxic T cells Viral hepatitis with formation of Councilman apoptotic bodies Prostatic atrophy after orchiectomy due to hormonal deprivation. In radiation and hypoxia. Degenerative diseases of CNS like Alzheimer's disease

2.2. Subcellular aletrations

2.2.1. Intracellular accumulatouins Normal constituents Lipids : TAG, cholesterol and cholesteryl esters Proteins Carbohydrates Abnormal metabolic Products Due to abnormal metabolism or defective degradation (caused by lack of specific enzymes as inborn errors) Pigment Endogenous (excess) Exogenous (inability to degrade them)

2.3. Reversible cell injusry

2.3.1. Necrosis Coagulative necrosis Liquefactive necrosis Caseous necrosis Fat necrosis Fibrinoid necrosis

2.3.2. Necrosis + putrefaction (Gangrene) Dry gangrene (senile gangrene) Wet gangrene (moist gangrene)

3. Mechanism

3.1. 1. ATP depletion

3.2. 2. Mitochondrial damage

3.3. 3. Increased free intracytosolic calcium

3.4. 4. Increase of oxygen-derived free radicalss

3.5. 5. Membrane damage

3.6. 6. nuclear damage