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FEBS Lett. 1989 Jan 2;242(2):237-9.

Interleukin-6 is the major regulator of acute phase protein synthesis in adult human hepatocytes.

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Biochemisches Institut, Universität Freiburg, FRG.


The three monokines interleukin-1 beta (IL-1 beta), tumor necrosis factor alpha (TNF alpha), and interleukin-6 (IL-6) modulate acute phase plasma protein synthesis in adult human hepatocytes. Only IL-6 stimulates the synthesis of the full spectrum of acute phase proteins as seen in inflammatory states in humans, i.e. synthesis and secretion of C-reactive protein, serum amyloid A, fibrinogen, alpha 1-antitrypsin, alpha 1-antichymotrypsin and haptoglobin are increased while albumin, transferrin and fibronectin are decreased. IL-1 beta as well as TNF alpha, although having a moderate effect on the positive acute phase proteins and inhibiting the synthesis of fibrinogen, albumin and transferrin, fail to induce serum amyloid A and C-reactive protein. These data suggest that IL-6 plays the key role in the regulation of acute phase protein synthesis in human hepatocytes.

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