Methyl-β-cyclodextrin alters adipokine gene expression and glucose metabolism in swine adipose tissue*

Authors

T. G. Ramsay, USDA-ARSFollow
L. Blomberg, USDA-ARSFollow
T. J. Caperna, USDA-ARS

Date of this Version

2013

Citation

Animal (2013), 7:10, pp 1690–1696; doi:10.1017/S1751731113001250

Comments

U.S. Government Work

Abstract

This study was designed to determine whether methyl-β-cyclodextrin (MCD) can substitute for albumin in incubation medium for neonatal swine adipose tissue explants, or whether MCD affects metabolism and cytokine expression. Subcutaneous adipose tissue explants (100±10 mg) were prepared from 21-day-old pigs. Explants were incubated in medium 199 supplemented with 25mM HEPES, 1.0 nM insulin at 37°C. The medium also contained bovine serum albumin (BSA) or MCD at 0%, 0.05%, 0.1%, 0.2% or 0.3%. Tissue explants were treated with these media for 1 h and then switched to the same basal incubation medium containing 0.05% BSA. Explants were removed from basal medium at 2 or 8 h of incubation, and real-time PCR was performed to assess expression of tumor necrosis a (TNF) and interleukin 6 (IL6), acetyl CoA carboxylase (ACAC) and fatty acid synthase (FASN). Alternatively, rates of ¹⁴C-glucose oxidation and lipogenesis were monitored±insulin (100 nM), following MCD treatment. Incubation with BSA had minimal effects on gene expression or adipose tissue metabolism, only producing a doubling in TNF mRNA abundance ( P