Document Detail


Pre-pubertal serum leptin levels and sensitivity to central leptin injection of prenatally undernourished female rats.
MedLine Citation:
PMID:  24662007     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
It has been reported that intrauterine undernutrition is closely associated with the pathogeneses of certain diseases in adulthood; i.e., insulin resistance and diabetes, and that leptin resistance plays a pivotal role in the pathology of such intrauterine growth restriction (IUGR)-related conditions. Therefore, examinations of IUGR-induced leptin resistance in early developmental period are important for protecting against future disease. In this study, the effects of prenatal undernutrition on the serum leptin levels and central leptin responses of rats during the neonatal and/or pre-pubertal period were examined. The 50% food-restricted undernourished dams' offspring (UNO) exhibited a significantly lower birth weight than the normal nutrition dams' offspring (NNO). However, the UNO grew rapidly, and their mean body weight had caught up with that of the NNO by postnatal day 8. Thus, there were no significant differences between the body weights of the two groups at postnatal day 12, 16, 20, or 28. The serum leptin levels of the UNO were significantly higher than those of the NNO at postnatal days 20 and 28. At postnatal day 28, no significant difference in the hypothalamic mRNA level of neuropeptide Y, which is the main target of leptin, or that of ObRb, which is the leptin receptor, was detected between the NNO and UNO. The chronic intracerebroventricular injection of leptin attenuated body weight gain in both the NNO and UNO; however, there were no significant differences between the body weights of the two groups at any of the examined postnatal time points, indicating that the UNO and NNO exhibited similar central sensitivity to leptin during the pre-pubertal period. These results suggest that prenatal undernutrition induces leptin resistance until the neonatal to pre-pubertal period and that these alterations might be caused by impaired transportation of leptin to central tissues.
Authors:
Takeshi Iwasa; Toshiya Matsuzaki; Munkhsaikhan Munkhzaya; Altankhuu Tungalagsuvd; Takako Kawami; Masahiro Murakami; Mikio Yamasaki; Takeshi Kato; Akira Kuwahara; Toshiyuki Yasui; Minoru Irahara
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-3-21
Journal Detail:
Title:  International journal of developmental neuroscience : the official journal of the International Society for Developmental Neuroscience     Volume:  -     ISSN:  1873-474X     ISO Abbreviation:  Int. J. Dev. Neurosci.     Publication Date:  2014 Mar 
Date Detail:
Created Date:  2014-3-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8401784     Medline TA:  Int J Dev Neurosci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier Ltd.
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