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Related Concept Videos

Regulation of Food Intake01:30

Regulation of Food Intake

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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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Obesity01:24

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Related Experiment Video

Updated: Aug 11, 2025

Sleeve Gastrectomy in Mice using Surgical Clips
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Correlation between improved leptin signaling and cognitive function post bariatric surgery.

Y Nozari1, C Park2, E Brietzke3

  • 1Mood Disorders Psychopharmacology Unit, Toronto Western Hospital, Toronto, ON, Canada; University of Toronto HBSc, Toronto, ON, Canada.

Journal of Affective Disorders
|February 3, 2023
PubMed
Summary
This summary is machine-generated.

Bariatric surgery may improve cognitive function by enhancing leptin signaling, potentially reversing inflammation and improving the JAK/STAT pathway in obese individuals.

Keywords:
Bariatric surgeryCognitionInflammationJAK/STATLeptinObesitySignaling pathway

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Area of Science:

  • Neuroscience and Endocrinology
  • Metabolic Surgery and Cognitive Health

Background:

  • Obesity is linked to cognitive dysfunction, potentially mediated by leptin resistance.
  • Bariatric surgery impacts both weight and hormonal signaling, including leptin.
  • The specific role of leptin signaling in post-bariatric cognitive improvements remains under-explored.

Purpose of the Study:

  • To review the potential correlation between leptin signaling and cognitive function after bariatric surgery.
  • To elucidate how improved leptin signaling influences cognitive enhancement post-surgery.
  • To propose leptin's Janus kinase/Signal transducer and activator of transcription (JAK/STAT) pathway as a mechanism for cognitive improvement.

Main Methods:

  • Literature review synthesizing existing studies on bariatric surgery, leptin, and cognition.
  • Analysis of proposed mechanisms linking metabolic changes to neurological outcomes.
  • Focus on the JAK/STAT signaling pathway and inflammatory processes.

Main Results:

  • Evidence suggests bariatric surgery can improve cognitive functions.
  • Changes in leptin levels and signaling are observed post-surgery.
  • The JAK/STAT pathway is implicated in mediating these effects.

Conclusions:

  • Improved leptin signaling, particularly via the JAK/STAT pathway, is a likely contributor to cognitive enhancement after bariatric surgery.
  • Reversal of inflammatory processes may underlie these improvements.
  • Targeting leptin signaling offers a potential therapeutic strategy for cognitive dysfunction in obesity.