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FEBS Lett. 1988 Dec 5;241(1-2):191-4.

The synthesis of human alpha-2-HS glycoprotein is down-regulated by cytokines in hepatoma HepG2 cells.

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INSERM Unité 78, Bois-Guillaume, France.


The regulation of the synthesis of alpha-2-HS glycoprotein (AHSG) by inflammatory mediators from activated monocytes was studied on the human hepatoma cell line HepG2 and compared to that of albumin. Monocyte-conditioned medium, recombinant human interleukin-6 (rhIL6) and interleukin-1 beta (rhIL1 beta) all down-regulated the synthesis of AHSG. This decrease was found both at the protein and the mRNA level. The most efficient mediator was the monocyte-conditioned medium, when rhIL1 beta was found to be less efficient than rhIL6. The combination of rhIL6 and rhIL1 beta resulted in an additive down-regulation of the AHSG mRNA levels. Similar results were obtained with albumin. These data indicate that AHSG is a negative acute-phase protein whose synthesis is regulated by cytokines in a manner similar to that of albumin.

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