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Related Concept Videos

Anorexia Nervosa01:28

Anorexia Nervosa

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Anorexia nervosa is a complex and severe eating disorder characterized by an intense fear of weight gain, an unrelenting pursuit of thinness, and a distorted body image. It often leads to dangerously low body weight relative to an individual's age and height. This disorder is marked by significant physical and psychological consequences, making it one of the most life-threatening psychiatric illnesses.
Symptoms and Physical Effects
Individuals with anorexia nervosa commonly exhibit extreme...
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Related Experiment Video

Updated: Mar 15, 2026

Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa
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Using the Activity-based Anorexia Rodent Model to Study the Neurobiological Basis of Anorexia Nervosa

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Anorexia Reduces GFAP+ Cell Density in the Rat Hippocampus.

Daniel Reyes-Haro1, Francisco Emmanuel Labrada-Moncada1, Durairaj Ragu Varman1

  • 1Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Boulevard Universitario 3001, 76230 Juriquilla, QRO, Mexico.

Neural Plasticity
|September 1, 2016
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Summary

Anorexia nervosa reduces astrocyte density in the hippocampus, a key brain region. This study in a mouse model reveals significant GFAP+ cell loss and altered intermediate filament expression, impacting brain energy supply.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Eating Disorders Research

Background:

  • Anorexia nervosa is a complex eating disorder with unknown neurobiological underpinnings.
  • Magnetic resonance imaging studies suggest hippocampal volume reduction in anorexic patients.
  • Astrocytes are crucial for brain energy supply, but their role in anorexia is unclear.

Purpose of the Study:

  • To investigate astrocyte density and reactivity in the hippocampus of the dehydration-induced anorexia (DIA) murine model.
  • To assess the expression of glial fibrillary acidic protein (GFAP) and other intermediate filaments in astrocytes.

Main Methods:

  • Utilized the DIA mouse model to mimic anorexia nervosa.
  • Quantified GFAP+ cell density and GFAP+ cells/nuclei ratio in hippocampal subregions (CA1, CA2, CA3, dentate gyrus).
  • Measured GFAP, vimentin, and nestin protein expression using Western blot and immunohistochemistry.

Main Results:

  • GFAP+ cell density was significantly reduced (~20%) in CA2, CA3, and dentate gyrus, but not CA1.
  • The GFAP+ cells/nuclei ratio decreased in CA2 (-23%) and dentate gyrus (-48%).
  • Anorexia led to reduced GFAP expression, increased vimentin and nestin expression, and more than twofold increase in reactive astrocytes in CA2 and dentate gyrus.

Conclusions:

  • Anorexia significantly reduces hippocampal astrocyte density, particularly in specific subregions.
  • Altered expression of intermediate filaments (vimentin, nestin) and increased astrocyte reactivity suggest a detrimental impact on astrocyte function.
  • These findings provide insights into the neurobiology of anorexia nervosa and its effects on brain structure and glial cells.