spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online November 24, 2003
Journal of Experimental Biology 207, 165-177 (2004)
Published by The Company of Biologists 2004
doi: 10.1242/jeb.00719
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Peacock, W. L.
Right arrow Articles by Speakman, J. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Peacock, W. L.
Right arrow Articles by Speakman, J. R.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

Photoperiodic effects on body mass, energy balance and hypothalamic gene expression in the bank vole

W. L. Peacock1,*, E. Król1, K. M. Moar2, J. S. McLaren1, J. G. Mercer2 and J. R. Speakman1,2

1 Aberdeen Centre for Energy Regulation and Obesity (ACERO), School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, Scotland, UK
2 ACERO, Rowett Research Institute, Bucksburn, Aberdeen, AB21 9SB, Scotland, UK



View larger version (33K):

[in a new window]
  		Fig. 1. Body mass of male (A) and female (B) bank voles exposed to a long-day (LD) or short-day (SD) photoperiod and measured over 10 weeks, commencing at Day 0. Values are expressed as means ± S.E.M.

 


View larger version (29K):

[in a new window]
  		Fig. 2. Food intake (g day-1) of male (A) and female (B) bank voles exposed to a long-day (LD) or short-day (SD) photoperiod and measured over 10 weeks, commencing at Day 0. Values are expressed as means ± S.E.M.

 


View larger version (24K):

[in a new window]
  		Fig. 3. Resting metabolic rate (A) and daily energy expenditures (B) of male and female bank voles exposed to a long-day (LD) or short-day (SD) photoperiod and measured before (Pre-manipulation) and 8 weeks (A) or 9 weeks (B) after the photoperiod switch. Values are expressed as means ± S.E.M.

 


View larger version (67K):

[in a new window]
  		Fig. 4. Autoradiographs showing localization of neuropeptide and receptor gene expression in coronal sections of male bank vole brain, following 12-week exposure to long-day photoperiod (LD). NPY, neuropeptide Y; AGRP, agouti-related protein; POMC, pro-opiomelanocortin; CART, cocaine- and amphetamine-regulated transcript; CRF, corticotrophin-releasing factor; MC3-R and MC4-R, melanocortin-3 and -4 receptors; ARC, arcuate nucleus; VMN, ventromedial nucleus; PVN, paraventricular nucleus.

 


View larger version (30K):

[in a new window]
  		Fig. 5. Effect of 12-week exposure to long-day photoperiod (LD) on hypothalamic neuropeptide and receptor gene expression in male and female bank voles. Data for short-day photoperiod (SD) females and LD individuals are expressed as a percent of the level in SD males, and presented as means ± S.E.M. The effect of photoperiod and sex on gene expression was tested by two-way ANOVA. *Significant difference (P<0.05); {dagger}difference approached significance at P=0.06. See Fig. 4 for abbreviations.

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?



© The Company of Biologists Ltd 2004