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Leptin Signal Transduction—A 2008 Update

This chapter appears in the following book:

Leptin and Leptin Antagonists

Edited by: Arieh Gertler
ISBN: TBA
» Get more information about this book at landesbioscience.com «

Chapter authors:
Walter Becker


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Leptin is an adipocyte‑secreted hormone that informs the brain about the status of the body’s energy stores. Leptin controls energy homeostasis through effects on satiety and energy expenditure but also regulates other processes, including reproduction, glycemic control, immune function and wound healing. The leptin receptor exists in multiple alternatively spliced isoforms, of which only the long form (LEPRb) associates with Janus kinase 2 (JAK2) to mediate intracellular signaling. Upon leptin binding, LEPRb initiates multiple intracellular signal transduction pathways that result in the activation of STAT family transcription factors, extracellular signal‑regulated kinases (ERK), phosphoinositol‑3 kinase, AMP‑activated kinase and ATP‑sensitive potassium channels. This chapter gives a delineation of our current knowledge about leptin signal transduction, with a particular focus on the role of individual signaling pathways in vivo and the changes in gene expression induced by leptin.

Walter Becker
Institute of Pharmacology and Toxicology, Medical Faculty of the RWTH Aachen University, Aachen, Germany.

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Leptin Signal Transduction—A 2008 Update

Walter Becker

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