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Concentrations of leptin in the serum of pregnant, lactating, and cycling rats and of leptin messenger ribonucleic acid in rat placental tissue

Amico, JA and Thomas, A and Crowley, RS and Burmeister, LA (1998) Concentrations of leptin in the serum of pregnant, lactating, and cycling rats and of leptin messenger ribonucleic acid in rat placental tissue. Life Sciences, 63 (16). 1387 - 1395. ISSN 0024-3205

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Abstract

Leptin concentrations were measured in the serum of cycling, pregnant, and lactating Sprague-Dawley rats. Serum leptin concentrations did not vary significantly during the estrous cycle. In contrast, as gestation advanced, serum leptin concentrations increased significantly, p < 0.0001. Following delivery, leptin concentrations declined and remained stable during lactation. Leptin messenger ribonucleic acid (mRNA) was identified in the visceral adipose tissue and placenta of rats sacrificed on days 14 and 21 of pregnancy. The relative abundance of placental leptin mRNA increased ≃4 to 5 fold from day 14 to 21 of gestation. The pattern of elevated leptin concentrations in the serum of late pregnant rats is similar to that reported in pregnant women, therefore the rat may be a useful model for the study of leptin during pregnancy. The increase in leptin in the serum of late pregnant rats, as well as an increase in placental mRNA, raises the possibility that leptin may serve a physiological role for the late parturient rat and/or its young.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Amico, JA
Thomas, A
Crowley, RS
Burmeister, LA
Date: 11 September 1998
Date Type: Publication
Journal or Publication Title: Life Sciences
Volume: 63
Number: 16
Page Range: 1387 - 1395
DOI or Unique Handle: 10.1016/s0024-3205(98)00405-6
Schools and Programs: School of Medicine > Biomedical Informatics
Refereed: Yes
ISSN: 0024-3205
MeSH Headings: Abdomen; Adipose Tissue--metabolism; Animals; Blotting, Northern; Body Weight; Estrus--blood; Estrus--metabolism; Female; Lactation--blood; Lactation--metabolism; Leptin; Placenta--metabolism; Pregnancy; Proteins--genetics; Proteins--metabolism; RNA, Messenger--metabolism; Radioimmunoassay; Rats; Rats, Sprague-Dawley; Regression Analysis; Time Factors
PubMed ID: 9952284
Date Deposited: 29 Aug 2012 20:56
Last Modified: 29 Jan 2019 15:55
URI: http://d-scholarship.pitt.edu/id/eprint/13786

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