Horm Metab Res 1999; 31(6): 359-362
DOI: 10.1055/s-2007-978754
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© Georg Thieme Verlag Stuttgart · New York

The Phosphodiesterase Inhibitor IBMX Suppresses TNF-α Expression in Human Adipocyte Precursor Cells: A Possible Explanation for its Adipogenic Effect

F. Hube, Y.-M. Lee, K. Röhrig, H. Hauner
  • Diabetes Research Institute at the Heinrich-Heine-University, Düsseldorf, Germany
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Publication Date:
20 April 2007 (online)

Tumor necrosis factor-α (TNF) is known to inhibit fat cell development in vitro and to be expressed in adipose tissue suggesting that it may act as an auto-/paracrine regulator of adipose tissue mass in vivo. We demonstrate here that endogenous TNF-mRNA expression of cultured human preadipocytes and adipocytes is suppressed by the unspecific phosphodiesterase inhibitor 3-isobutyl-1-methylxanthine (IBMX), which is frequently used to trigger the differentiation process. As assessed by the measurement of glycerophosphate dehydrogenase, IBMX stimulated the differentiation of human preadipocytes in a dose dependent manner up to threefold but remained ineffective when cells were simultaneously treated with 1 nM TNF. These results suggest that the adipogenic effect of IBMX is mediated by suppression of endogenous TNF production.