Gene expression in hypothalamus and brown adipose tissue of mice divergently selected for heat loss

Mark F. Allan, Merlyn K. Nielsen, Daniel Pomp

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Gene expression was evaluated in mice divergently selected for 16 generations for heat loss, measured by direct calorimetry. The high (MH) heat loss line has ∼0% greater heat loss, ∼35% less body fat, ∼20% greater feed intake, and twofold greater activity levels than the low (ML) heat loss line. At 11 wk, inbred males (developed from MH and ML) were euthanized 3 h after dark for dissection of tissues and extraction of RNA. Differential display PCR (DD-PCR) was used to evaluate transcriptional differences between lines in hypothalamus and brown adipose tissue (BAT). Evaluation was replicated within and across lines, using family pools of mRNA. Two genes were confirmed by competitive RT-PCR and/or Northern analysis to have greater levels of mRNA present in ML relative to MH mice. In both hypothalamus and BAT, the ribosomal protein L3 (RPL3) gene was expressed at higher levels in ML, whereas an unknown expressed sequence tag (EST) was also found at higher levels in the hypothalamus of ML mice. These results implicate RPL3 in regulation of energy balance and extend the genetic dissection of response to selection to the transcriptional level.

Original languageEnglish (US)
Pages (from-to)149-156
Number of pages8
JournalPhysiological genomics
Volume2000
Issue number3
DOIs
StatePublished - Sep 2000

Keywords

  • Differential display
  • Energy balance
  • Obesity

ASJC Scopus subject areas

  • Physiology
  • Genetics

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