Influences of ionomycin, dibutyryl-cycloAMP and tumour necrosis factor-alpha on intracellular amount and secretion of apM1 in differentiating primary human preadipocytes

Horm Metab Res. Nov-Dec 2000;32(11-12):548-54. doi: 10.1055/s-2007-978684.


3T3-L1-adipocytes produce the adipocyte complement related protein of 30 kD (Acrp30), which is also designated as AdipoQ. In order to study the expression and secretion of the human homologue of this protein, apM1 (adipose Most abundant gene transcript 1, also named gelatin-binding protein of 28 kD [GBP28] or adiponectin), a polyclonal antibody was produced. Both expression and secretion can be detected beginning with day 4 after induction of differentiation. The amount of expressed apM1 correlates with the specific activity of the differentiation marker glycerol-3-phosphate dehydrogenase. Secretion of apM1 is increased by the addition of ionomycin. Both the nonhydrolysable dibutyryl-cycloAMP and tumour necrosis factor alpha reduce the expression and secretion of apM1.

MeSH terms

  • 1-Methyl-3-isobutylxanthine / pharmacology
  • Adipocytes / metabolism*
  • Adiponectin
  • Adult
  • Biomarkers
  • Blotting, Western
  • Bucladesine / pharmacology*
  • Cell Differentiation / drug effects
  • Cells, Cultured
  • Electrophoresis, Polyacrylamide Gel
  • Female
  • Gene Expression / drug effects
  • Glycerolphosphate Dehydrogenase / analysis
  • Humans
  • Hydrocortisone / pharmacology
  • Intercellular Signaling Peptides and Proteins*
  • Ionomycin / pharmacology*
  • Male
  • Proteins / genetics
  • Proteins / metabolism*
  • Stem Cells / metabolism*
  • Tumor Necrosis Factor-alpha / pharmacology*


  • Adiponectin
  • Biomarkers
  • Intercellular Signaling Peptides and Proteins
  • Proteins
  • Tumor Necrosis Factor-alpha
  • Ionomycin
  • Bucladesine
  • Glycerolphosphate Dehydrogenase
  • 1-Methyl-3-isobutylxanthine
  • Hydrocortisone