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- W2608489327 abstract "Early life diet influences metabolic programming, increasing the risk for long-lasting metabolic ill health. Neonatally overfed rats have an early increase in leptin that is maintained long term and is associated with a corresponding elevation in body weight. However, the immediate and long-term effects of neonatal overfeeding on hypothalamic anorexigenic pro-opiomelanocortin (POMC) and orexigenic agouti-related peptide (AgRP)/neuropeptide Y (NPY) circuitry, and if these are directly mediated by leptin, have not yet been examined. Here, we examined the effects of neonatal overfeeding on leptin-mediated development of hypothalamic POMC and AgRP/NPY neurons and whether these effects can be normalised by neonatal leptin antagonism in male Wistar rats. Neonatal overfeeding led to an acute (neonatal) resistance of hypothalamic neurons to exogenous leptin, but this leptin resistance was resolved by adulthood. While there were no effects of neonatal overfeeding on POMC immunoreactivity in neonates or adults, the neonatal overfeeding-induced early increase in arcuate nucleus (ARC) AgRP/NPY fibres was reversed by adulthood so that neonatally overfed adults had reduced NPY immunoreactivity in the ARC compared with controls, with no further differences in AgRP immunoreactivity. Short-term neonatal leptin antagonism did not reverse the excess body weight or hyperleptinaemia in the neonatally overfed, suggesting factors other than leptin may also contribute to the phenotype. Our findings show that changes in the availability of leptin during early life period influence the development of hypothalamic connectivity short term, but this is partly resolved by adulthood indicating an adaptation to the metabolic mal-programming effects of neonatal overfeeding." @default.
- W2608489327 created "2017-05-05" @default.
- W2608489327 creator A5005870070 @default.
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- W2608489327 creator A5040935678 @default.
- W2608489327 creator A5058063005 @default.
- W2608489327 creator A5086603252 @default.
- W2608489327 date "2017-07-01" @default.
- W2608489327 modified "2023-10-13" @default.
- W2608489327 title "Hypothalamic effects of neonatal diet: reversible and only partially leptin dependent" @default.
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- W2608489327 doi "https://doi.org/10.1530/joe-16-0631" @default.
- W2608489327 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28455431" @default.
- W2608489327 hasPublicationYear "2017" @default.
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