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Pituitary pars intermedia dysfunction (PPID), or equine Cushing's disease, is an endocrine disease affecting the pituitary gland of horses. It is most commonly seen in older animals, [ 1 ] and is classically associated with the formation of a long, wavy coat ( hirsutism ) and chronic laminitis .
Equine drug testing is a form of drug testing applied to performance horses in regulated competition. Most common in racehorses , drug tests are also performed on horses in endurance riding and in international competition such as the Olympics and FEI -sanctioned competition.
Adrenocorticotropic hormone is used as a medication and as diagnostic agent in the ACTH stimulation test. [ 1 ] [ 2 ] : 316, 1165 [ 3 ] : 84, 271 The form that is purified from pig pituitary glands is known as corticotropin [ 1 ] [ 2 ] : 316 is a medication and naturally occurring polypeptide tropic hormone produced and secreted by the anterior ...
The ACTH test (also called the cosyntropin, tetracosactide, or Synacthen test) is a medical test usually requested and interpreted by endocrinologists to assess the functioning of the adrenal glands' stress response by measuring the adrenal response to adrenocorticotropic hormone (ACTH; corticotropin) or another corticotropic agent such as tetracosactide (cosyntropin, tetracosactrin; Synacthen ...
Prior to the availability of sensitive TSH assays, thyrotropin releasing hormone or TRH stimulation tests were relied upon for confirming and assessing the degree of suppression in suspected hyperthyroidism. Typically, this stimulation test involves determining basal TSH levels and levels 15 to 30 minutes after an intravenous bolus of TRH ...
However, equivocal test results require retesting at a later date, or performing a different test. A similar test is available outside the US, in areas where corn-syrup products are less readily available, where horses are given a morning meal of chaff with dextrose powder, and blood insulin levels are measured 2 hours later. [16]
Cushing's syndrome disease, also known as hyperadrenocorticism and spontaneous hypercortisolism, is a condition resulting from an endocrine disorder where too much adrenocorticotropic and cortisol hormones are produced, causing toxicity.
Evocative/suppression testing refers to a class of tests performed where one substance is measured both before and after the administration of another substance to determine if the levels are stimulated ("evocative") or suppressed.