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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Insulin: The Receptor and Signaling Pathways

Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but this inhibition is released...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Autocrine Signaling01:01

Autocrine Signaling

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Related Experiment Video

Updated: Jun 12, 2026

Isolation of Targeted Hypothalamic Neurons for Studies of Hormonal, Metabolic, and Electrical Regulation
09:29

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Published on: August 4, 2023

Central leptin signalling: beyond the arcuate nucleus.

Zorica Jovanovic1, Giles S H Yeo

  • 1University of Cambridge Metabolic Research Labs, Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom.

Autonomic Neuroscience : Basic & Clinical
|June 16, 2010
PubMed
Summary

Leptin is a key hormone for energy balance. Recent evidence shows leptin signaling in the central nervous system extends beyond the arcuate nucleus (ARC) to regulate energy homeostasis.

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Last Updated: Jun 12, 2026

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05:45

Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing

Published on: October 25, 2019

Area of Science:

  • Neuroendocrinology
  • Metabolic regulation
  • Hormonal signaling

Background:

  • Leptin, an adipocyte-derived hormone, is vital for maintaining energy balance.
  • Its central melanocortin signaling pathway, primarily via the arcuate nucleus (ARC), is well-studied.
  • Leptin receptors are broadly distributed across the central nervous system (CNS).

Purpose of the Study:

  • To review recent evidence on central leptin signaling pathways.
  • To explore leptin's actions beyond the arcuate nucleus (ARC) in regulating energy homeostasis.
  • To highlight diverse mechanisms of leptin action in the CNS.

Main Methods:

  • Literature review of recent scientific findings.
  • Analysis of studies investigating leptin receptor distribution.
  • Examination of research on leptin's effects on feeding behavior and energy balance.

Main Results:

  • Leptin influences energy homeostasis through multiple CNS sites, not exclusively the ARC.
  • Distinct mechanisms and receptor locations mediate leptin's diverse effects.
  • Evidence supports significant roles for extra-ARC leptin signaling.

Conclusions:

  • The ARC is a critical, but not the sole, mediator of leptin's central actions.
  • Understanding extra-ARC leptin signaling is crucial for a complete picture of energy balance regulation.
  • Further research into these broader pathways can reveal new therapeutic targets.