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Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features of the...
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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...
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The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
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Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

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.
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Major Hormones and Their Functions

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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Cushing syndrome refers to the collection of clinical manifestations that arise when tissues are exposed to excessive amounts of cortisol or cortisol-like medications over an extended period. Cortisol, a glucocorticoid produced by the adrenal cortex, regulates metabolism, immune responses, and the body’s adaptation to stress. When its concentration remains chronically elevated, these physiological pathways become dysregulated, resulting in the characteristic features of the syndrome.Exogenous...

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Stress-induced cyclical hypreprolactinemia.

K Jagadheesan1, J Kumar, H S Nizamie

  • 1K. JAGADHEESAN, MD., Junior Resident, Central Institute of Psychiatry, Kanke (PO), Ranchi - 834 006.

Indian Journal of Psychiatry
|March 17, 2011
PubMed
Summary

This study presents a case where hyperprolactinemia, a condition of high prolactin levels, preceded depressive disorder episodes. This highlights a potential but unreported precursor to organic depression.

Keywords:
hyperprolactinemiahypothyroidismorganic depressive disorderstress

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Area of Science:

  • Endocrinology
  • Psychiatry

Background:

  • Hypothyroidism can manifest as hyperprolactinemia and depressive disorder.
  • The temporal relationship between these conditions is not fully understood.

Purpose of the Study:

  • To report a case where hyperprolactinemia with overt symptoms preceded organic depressive disorder episodes.
  • To contribute to understanding the clinical presentations of hypothyroidism.

Main Methods:

  • Case report.
  • Clinical observation and patient history.

Main Results:

  • The patient presented with hyperprolactinemia that clearly preceded overt symptoms of organic depressive disorder.
  • This presentation is unusual as hyperprolactinemia typically co-occurs or follows depressive symptoms in hypothyroidism.

Conclusions:

  • Hyperprolactinemia can, in rare instances, serve as a presenting symptom that precedes episodes of organic depressive disorder.
  • This case underscores the importance of considering endocrine evaluations in patients with unexplained mood disorders.