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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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Bulimia nervosa is a complex and severe eating disorder characterized by a cyclical pattern of binge-and-purge eating pattern. It generally involves an episode of binge eating, followed by compensatory behaviors such as vomiting, excessive exercise, laxative use, or fasting, to prevent weight gain. Despite often maintaining a normal weight, individuals with bulimia are intensely preoccupied with their body image and harbor an overwhelming fear of gaining weight. This can contribute to the...
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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
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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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Human Genetics01:28

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Related Experiment Video

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Assessing Activity-based Anorexia in Mice
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Potential New Expression Biomarkers for Anorexia Nervosa.

Camille Verebi1,2, Nicolas Lebrun2, Justine Vily Petit3

  • 1Service de Médecine Génomique des maladies de système et d'organe, Hôpital Cochin, Assistance Publique, Centre Université de Paris Cité, Paris, France.

American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics : the Official Publication of the International Society of Psychiatric Genetics
|December 11, 2024
PubMed
Summary

Anorexia nervosa (AN) research identified 673 differentially expressed genes, including Vanin-1 (Vnn1). Vnn1 underexpression in AN patients and a mouse model suggests its role in the disorder.

Keywords:
RNA‐sequencingVanin‐1animal modelanorexia nervosaoxidative phosphorylation

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Area of Science:

  • Genetics
  • Neuroscience
  • Metabolic Disorders

Background:

  • Anorexia nervosa (AN) is a complex psychiatric disorder with high heritability (~70%).
  • Genome-wide association studies have identified AN risk loci, but underlying molecular mechanisms require elucidation.

Purpose of the Study:

  • To investigate the molecular mechanisms and identify candidate genes contributing to the genetic basis of anorexia nervosa.
  • To explore gene expression differences in peripheral blood mononuclear cells from AN patients and controls.
  • To validate findings in a mouse model of chronic food restriction.

Main Methods:

  • Transcriptome profiling of peripheral blood mononuclear cells from 15 AN patients and 15 healthy controls.
  • Validation of gene expression changes in a mouse model mimicking chronic food restriction.
  • Analysis of differentially expressed genes, focusing on previously implicated genes and Vanin-1 (Vnn1).

Main Results:

  • Identified 673 significantly differentially expressed genes in AN patients.
  • Seven genes previously found dysregulated in AN-derived neurons were among the differentially expressed genes.
  • Vanin-1 (Vnn1) was underexpressed in AN patients and confirmed to be underexpressed in the liver of the chronic food restriction mouse model.

Conclusions:

  • Quantitative food restriction impacts Vnn1 expression, suggesting its contribution to the anorexic phenotype.
  • Vnn1 is a potential biomarker for predicting or understanding anorexia nervosa.
  • The study highlights candidate genes and pathways for future AN research.