File:Updated leptin–melanocortin model.jpg
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DescriptionUpdated leptin–melanocortin model.jpg |
English: "The discovery of leptin in 1994 was an “eureka moment” in the field of neurometabolism that provided new opportunities to better understand the central control of energy balance and glucose metabolism. Rapidly, a prevalent model in the field emerged that pro-opiomelanocortin (POMC) neurons were key in promoting leptin's anorexigenic effects and that the arcuate nucleus of the hypothalamus (ARC) was a key region for the regulation of energy homeostasis. While this model inspired many important discoveries, a growing body of literature indicates that this model is now outdated. In this review, we re-evaluate the hypothalamic leptin–melanocortin model in light of recent advances that directly tackle previous assumptions, with a particular focus on the ARC. We discuss how segregated and heterogeneous these neurons are, and examine how the development of modern approaches allowing spatiotemporal, intersectional, and chemogenetic manipulations of melanocortin neurons has allowed a better definition of the complexity of the leptin–melanocortin system. We review the importance of leptin in regulating glucose homeostasis, but not food intake, through direct actions on ARC POMC neurons. We further highlight how non-POMC, GABAergic neurons mediate leptin's direct effects on energy balance and influence POMC neurons." |
Date | 17 January 2023 |
Source | https://onlinelibrary.wiley.com/doi/10.1111/jnc.15765 |
Author | Olivier Lavoie, Natalie Jane Michael, Alexandre Caron |
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current | 01:25, 6 December 2023 | 2,128 × 1,812 (292 KB) | Buidhe (talk | contribs) | Uploaded a work by Olivier Lavoie, Natalie Jane Michael, Alexandre Caron from https://onlinelibrary.wiley.com/doi/10.1111/jnc.15765 with UploadWizard |
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