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• W2942071418 abstract "Objective A minipig model was employed to explore the changes in endogenous leptin transport into the central nervous system and in hypothalamic sensitivity to exogenous leptin when individuals are placed on high‐fat diet (HFD) compared with standard diet. Methods Serum and cerebrospinal fluid (CSF) leptin concentrations during 10 weeks of HFD versus standard diet and exogenous leptin‐induced STAT3 phosphorylation in the hypothalamus of minipigs were assessed, and the hypothalamic leptin‐sensitive cells were characterized by immunofluorescence. Results The efficiency of the passage of endogenous blood‐borne leptin into the CSF (measured as the log [CSF:serum leptin ratio]) decreased over time in minipigs fed a HFD (β = –0.04 ± 0.005 per kilogram of weight gain in HFD; P < 0.0001), while it remained stable in minipigs fed a standard diet. However, the ability of peripherally administered leptin to activate its receptor in hypothalamic neurons was preserved in obese minipigs at 10 weeks of HFD. Conclusions Together, these data are consistent with the existence of an early‐onset tranport deficiency for endogenous circulating leptin into the brain in individuals developing obesity, preceding the acquisition of hypothalamic leptin resistance. Although additional studies are required to identify the underlying mechanisms, our study paves the way for the development of new preclinical pharmacological models targeting the restoration of the shuttling of peripheral leptin into the central nervous system to manage obesity." @default.
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• W2942071418 date "2019-04-21" @default.
• W2942071418 modified "2023-10-16" @default.
• W2942071418 title "Preclinical Assessment of Leptin Transport into the Cerebrospinal Fluid in Diet‐Induced Obese Minipigs" @default.
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• W2942071418 doi "https://doi.org/10.1002/oby.22465" @default.
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