The type II hemopexin interleukin-6 response element predominates the transcriptional regulation of the hemopexin acute phase responsiveness.

Hemopexin (Hx) is induced during the acute phase response (APR) by the cytokine interleukin (IL)-6. A type II IL-6 response element (RE) of the Hx gene has been characterized recently (J. Biol. Chem. (1994); 269, 12654-12661). To assess Hx gene regulation by other agents, various cytokines and growth factors were tested for their ability to induce Hx in rat hepatoma H-35 cells. IL-6-type cytokines, IL-1 beta and TNF-alpha, in contrast to transforming growth factor-beta (TGF-beta), hepatocyte growth factor and insulin significantly increased Hx gene expression. Chloramphenicol acetyltransferase (CAT) activity in H-35 cells transfected with constructs that contained the 5'-flanking Hx promoter region or multiple copies of the Hx IL-6-RE fused to the CAT gene was upregulated only by IL-6-type cytokines, although to varying degrees. These data indicate that signal transduction pathways mediated by IL-6-type cytokines but not those by IL-1 beta and TNF-alpha converge on the common Hx IL-6-RE.

• Publication year

  1995

• Venue

  Biochemical and Biophysical Research Communications - BBRC

• Publication date

  1995-02-06

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.1006/BBRC.1995.1173PMID 7857266
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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