Q and A: about health and research

The pituitary gland is a small gland located at the base of the brain, but it plays a major role in controlling the body’s hormonal system. It produces several important hormones, including prolactin, growth hormone (GH), adrenocorticotropic hormone (ACTH), thyroid-stimulating hormone (TSH), luteinizing hormone (LH), and follicle-stimulating hormone (FSH). Through these hormones, the pituitary influences growth, reproduction, thyroid function, stress responses, and breast-milk production. Prolactin and Its Regulation Prolactin is best known for stimulating breast-milk production after childbirth. It is produced mainly by lactotroph cells in the anterior pituitary gland, although prolactin can also be produced locally in tissues such as the uterus, mammary glands, immune system, and parts of the nervous system. Prolactin secretion is unusual because it is normally kept under inhibition by dopamine, a neurotransmitter released by the hypothalamus. Dopamine signals the pituitary...

The human body's response to stress is one of its most sophisticated survival mechanisms. Whether the threat is physical, emotional, or psychological, the body rapidly activates a coordinated network of hormones and neural signals designed to help us respond effectively. Central to this process are corticotropin-releasing hormone (CRH), adrenocorticotropic hormone (ACTH), adrenaline, cortisol, and other glucocorticoids. Together, these substances form an integrated stress-response system that prepares the body for action, sustains performance during a challenge, and regulates recovery afterward. The Two Arms of the Stress Response The stress response operates through two interconnected systems. The first is the sympathetic nervous system, which produces the immediate "fight-or-flight" response through the release of adrenaline. The second is the hypothalamic-pituitary-adrenal (HPA) axis, which produces a slower but longer-lasting hormonal response involving CRH, ACTH, and...

Addisonian crisis remains a significantly underestimated and underrecognized medical emergency, frequently leading to misdiagnosis.   Addison’s disease is a form of primary adrenal insufficiency, most commonly of autoimmune etiology. Typical clinical features include fatigue, generalized weakness, reduced physical performance, and cutaneous hyperpigmentation. Adrenal insufficiency (AI) can cause severe, life-threatening encephalopathy , often presenting as acute altered mental status, confusion, seizures, coma, or psychosis due to severe cortisol deficiency. It mimics infectious or autoimmune encephalitis, characterized by hypotension, profound hyponatremia (low sodium), and hypoglycemia. ICD-10 Code Description E27.1 Primary adrenal insufficiency E27.2 Addisonian crisis An Addisonian crisis represents a life-threatening endocrine emergency resulting from acute cortisol deficiency. Immediate treatment is...