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

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 approximately 50% greater heat loss, approximately 35% less body fat, approximately 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.

journal_name

Physiol Genomics

journal_title

Physiological genomics

authors

Allan MF,Nielsen MK,Pomp D

doi

10.1152/physiolgenomics.2000.3.3.149

subject

Has Abstract

pub_date

2000-09-08 00:00:00

pages

149-56

issue

3

eissn

1094-8341

issn

1531-2267

pii

3/3/149

journal_volume

3

pub_type

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