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Endocrine abnormalities in Anorexia Nervosa.

Gerasimos E Krassas1

  • 1Department of Endocrinology, Diabetes and Metabolism, Panagia General Hospital, Thessaloniki, Greece. krassas@the.forthnet.gr

Pediatric Endocrinology Reviews : PER
|January 27, 2006
PubMed
Summary

Anorexia Nervosa (AN) involves endocrine changes, primarily hypothalamic dysfunction, affecting hormones like gonadotropins, growth hormone, and thyroid hormones. These hormonal imbalances in AN patients typically reverse with weight gain and nutritional rehabilitation.

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Area of Science:

  • Endocrinology
  • Psychiatry
  • Neuroscience

Background:

  • Anorexia Nervosa (AN) is a severe psychiatric disorder with high mortality.
  • It is characterized by amenorrhea, weight loss, and behavioral changes, often affecting young women.
  • Endocrine alterations in AN suggest significant hypothalamic dysfunction.

Purpose of the Study:

  • To comprehensively review the endocrine changes associated with Anorexia Nervosa.
  • To understand the role of hormonal dysregulation in the pathophysiology of AN.
  • To examine the reversibility of these endocrine changes with nutritional rehabilitation.

Main Methods:

  • Review of existing literature on endocrine profiles in Anorexia Nervosa patients.
  • Analysis of hormonal levels including gonadotropins, growth hormone, thyroid hormones, cortisol, and reproductive hormones.

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  • Assessment of hormonal responses to stimulation tests and their correlation with body weight and nutritional status.

    • Main Results:

    • Decreased gonadotropin (FSH, LH) and sex steroid levels, with blunted GnRH response.
    • Altered growth hormone (GH) dynamics: elevated fasting levels, normal stimulated response, decreased IGF-I and IGFBP-3.
    • Thyroid hormone changes (decreased T3, T4; elevated rT3) and abnormal cortisol regulation (elevated cortisol, abnormal dexamethasone suppression test).
    • Decreased leptin and elevated ghrelin levels, both normalizing with refeeding.

    Conclusions:

    • Anorexia Nervosa is associated with widespread neuroendocrine dysfunction, particularly involving the hypothalamus.
    • Hormonal changes are largely secondary to malnutrition and are reversible with weight restoration.
    • Understanding these endocrine alterations is crucial for managing AN and monitoring treatment efficacy.