Determinants of fetal leptin synthesis, fat mass, and circulating leptin concentrations in well-nourished ewes in late pregnancy
Article
Article Title | Determinants of fetal leptin synthesis, fat mass, and circulating leptin concentrations in well-nourished ewes in late pregnancy |
---|---|
ERA Journal ID | 16057 |
Article Category | Article |
Authors | Muhlhausler, B. S. (Author), Roberts, C. T. (Author), Yuen, B. S. J. (Author), Marrocco, E. (Author), Budge, H. (Author), Symonds, M. E. (Author), McFarlane, J. R. (Author), Kauter, K. G. (Author), Stagg, P. (Author), Pearse, J. K. (Author) and McMillen, I. C. (Author) |
Journal Title | Endocrinology |
Journal Citation | 144 (11), pp. 4947-4954 |
Number of Pages | 8 |
Year | 2003 |
Place of Publication | Chevy Chase, MD. United States |
ISSN | 0013-7227 |
1945-7170 | |
Digital Object Identifier (DOI) | https://doi.org/10.1210/en.2003-0555 |
Web Address (URL) | http://endo.endojournals.org/content/144/11/4947.long |
Abstract | We have investigated the factors regulating leptin synthesis, fat deposition, and circulating leptin concentrations in fetuses of well nourished ewes in late pregnancy. Vascular catheters were surgically inserted in 17 pregnant ewes and their fetuses at 103–120 d gestation (term = 147 ± 3 d). Ewes were fed a diet providing either 100% (control; n = 9) or approximately 155% (well fed; n = 8) of the maintenance energy requirements and fetal perirenal and interscapular fat depots were collected at 139–141 d gestation. There was a significant relationship between the relative mass of fetal unilocular fat and fetal glucose (relative mass of unilocular fat, 1.14; fetal glucose, +0.16; r = 0.50; P < 0.04; n = 17), but not insulin, concentrations in the control and well-fed groups. In contrast to the controls, there was a positive relationship between the relative abundance of leptin mRNA and fetal insulin, but not glucose, concentrations in fetal perirenal adipose tissue in the well-fed group. A moderate increase in maternal nutrition also resulted in a strong reciprocal relationship between uncoupling protein 1 and leptin expression in fetal perirenal adipose tissue in late gestation (well-fed group: uncoupling protein 1 mRNA:18S rRNA, -0.51; leptin mRNA:ß-actin mRNA, +1.53; r = 0.80; P < 0.02; n = 8). These studies provide evidence that fetal glucose and insulin differentially regulate fetal fat deposition and leptin mRNA expression within the fetal perirenal fat depot in the well nourished animal during late gestation. |
Keywords | leptin synthesis; fetus; fetal glucose |
ANZSRC Field of Research 2020 | 310903. Animal developmental and reproductive biology |
300303. Animal nutrition | |
300305. Animal reproduction and breeding | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Adelaide |
University Hospital Nottingham, United Kingdom | |
University of New England |
https://research.usq.edu.au/item/9zw76/determinants-of-fetal-leptin-synthesis-fat-mass-and-circulating-leptin-concentrations-in-well-nourished-ewes-in-late-pregnancy
1897
total views11
total downloads0
views this month0
downloads this month