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Arch Biochem Biophys. 2007 Aug 1;464(1):100-11. Epub 2007 May 7.

Differentiation-dependent expression of Adhfe1 in adipogenesis.

Author information

  • 1Department of Biochemistry and Cancer Biology, Medical University of Ohio, Toledo, OH 43614, USA.

Abstract

We have determined that adipocytes are a major site of expression of the transcript for the novel alcohol dehydrogenase (ADH), Adhfe1. Adhfe1 is unique in that the sequence of its encoded protein places it among the iron-activated ADHs. Western blot analysis reveals Adhfe1 encodes a 50 kDa protein and immunocytochemical staining indicates mitochondrial localization. Adhfe1 transcript exhibits differentiation-dependent expression during in vitro brown and white adipogenesis. Unlike many adipocyte-enriched genes, however, Adhfe1 transcript expression in adipocytes is refractory to TNFalpha-mediated downregulation. However, use of pharmacological inhibitors reveals PI 3-kinase-mediated signals maintain the basal level of Adhfe1 transcript in 3T3-L1 adipocytes. Tissue profiling studies show Adhfe1 transcript is restricted to white and brown adipose tissues, liver, and kidney. In comparison to C57BL/6 mice, Adhfe1 transcript is downregulated 40% in white adipose tissue of ob/ob obese mice. Further characterization of Adhfe1 should yield new insights into adipocyte function and energy metabolism.

PMID:
17559793
[PubMed - indexed for MEDLINE]
PMCID:
PMC2426734
Free PMC Article

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