Function in Alcoholic Liver Disease
Kupffer cell activation is responsible for early ethanol-induced liver injury, common in chronic alcoholics. Chronic alcoholism and liver injury deal with a two hit system. The second hit is characterized by an activation of the Toll-like receptor 4 (TLR4) and CD14, receptors on the Kupffer cell that internalize endotoxin (lipopolysaccharide or LPS). This activates the transcription of pro-inflammatory cytokines (Tumor necrosis factor-alpha or TNFα) and production of superoxides (a pro-oxidant). TNFα will then enter the stellate cell in the liver, leading to collagen synthesis and fibrosis. Fibrosis will eventually cause cirrhosis, or loss of function of the liver.
Read more about this topic: Kupffer Cell
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