Effect of interleukin-11 on the levels of mRNAs encoding heme oxygenase and haptoglobin in human HepG2 hepatoma cells.
Effect of recombinant human interleukin-11 (rhIL-11) on the expression of transcripts encoding microsomal heme oxygenase (HO), the rate-limiting enzyme in heme catabolism, and haptoglobin (Hpt), a major acute-phase protein, were examined in human HepG2 hepatoma cells. Treatment of HepG2 cells with rhIL-11 elicited an increase in HO mRNA in a dose- and a time-dependent fashion. The dose response curve, its magnitude of response and its time course were similar to those observed with recombinant human interleukin-6 (rhIL-6). In contrast, rhIL-11 had a far smaller effect on the level of Hpt mRNA than did rhIL-6. These findings demonstrate that the two cytokines are similar in regulating heme catabolism, while markedly different in inducing certain acute-phase proteins.
Rockefeller University, New York, N.Y. 10021.
Y
Y
Fukuda
S
S
Sassa
D015870:Gene Expression / Q000187:drug effects; D006242:Haptoglobins / Q000235:genetics*; D006419:Heme Oxygenase (Decyclizing) / Q000235:genetics*; D006801:Humans; D017370:Interleukin-11 / Q000494:pharmacology*; D015850:Interleukin-6 / Q000494:pharmacology; D012333:RNA, Messenger / Q000187:drug effects / Q000378:metabolism*; D011994:Recombinant Proteins / Q000494:pharmacology; D014407:Tumor Cells, Cultured
D006242:Haptoglobins; D017370:Interleukin-11; D015850:Interleukin-6; D012333:RNA, Messenger; D011994:Recombinant Proteins; D006419:Heme Oxygenase (Decyclizing)