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Related Concept Videos

Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
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Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
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Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
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Preparation of Mouse Pituitary Immunogen for the Induction of Experimental Autoimmune Hypophysitis
10:52

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Published on: December 17, 2010

Immune function in hypopituitarism: time to reconsider?

Annice Mukherjee1, Matthew Helbert, Julian Davis

  • 1Department of Endocrinology, Christie Hospital, Manchester, UK. annice.mukherjee@srft.nhs.uk

Clinical Endocrinology
|December 31, 2009
PubMed
Summary
This summary is machine-generated.

Adult hypopituitarism may disrupt immune function, potentially explaining increased mortality. Research found humoral immune deficiency in patients despite hormone replacement therapy, suggesting a link between pituitary hormones and immunity.

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Area of Science:

  • Endocrinology and Immunology
  • Pituitary Gland Function
  • Immune System Regulation

Background:

  • Hypopituitarism is not recognized as a cause of human immune disruption.
  • Emerging evidence from preclinical studies suggests the pituitary gland influences immune regulation.
  • The elevated mortality risk in adult hypopituitarism patients is poorly understood, with immune dysfunction a potential factor.

Purpose of the Study:

  • To review existing data on pituitary hormone effects on immune function.
  • To discuss the clinical implications of potential immune dysregulation in severe hypopituitarism.
  • To present new findings on immune status in adults with treated, severe hypopituitarism.

Main Methods:

  • Review of current literature on pituitary hormones and immunity.
  • Analysis of immune status in adult hypopituitarism patients.
  • Assessment of humoral immunity despite stable pituitary hormone replacement therapy, including growth hormone (GH).

Main Results:

  • A significant proportion of adult hypopituitarism patients exhibited humoral immune deficiency.
  • This deficiency was particularly noted in patients with low pretreatment Insulin-like Growth Factor I (IGF-I) levels.
  • The observed immune deficiency appeared independent of anticonvulsant use or corticosteroid replacement.

Conclusions:

  • Severe hypopituitarism may be associated with immune dysregulation, specifically humoral immune deficiency.
  • Pituitary hormones, including GH, may play a crucial role in maintaining immune homeostasis.
  • Further studies are required to confirm these findings and elucidate the clinical significance of immune dysfunction in hypopituitarism.