thyroxin


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Related to thyroxin: Levothyroxine

thy·rox·ine (T4),

, thyroxin (thī-rok'sēn, -sin),
The l-isomer is the active iodine compound existing normally in the thyroid gland and extracted therefrom in crystalline form for therapeutic use; also prepared synthetically; used for the relief of hypothyroidism, cretinism, and myxedema.

thy·rox·ine

, thyroxin (thī-rok'sēn, -sin)
The active iodine compound existing normally in the thyroid gland and extracted therefrom in crystalline form for therapeutic use; also prepared synthetically; used for the relief of hypothyroidism, congenital hypothyroidism, and myxedema.

Thyroxin

The hormone secreted by the thyroid gland.
Mentioned in: Goiter

thy·rox·ine

, thyroxin (thī-rok'sēn, -sin)
The active iodine compound existing normally in the thyroid gland and extracted therefrom in crystalline form for therapeutic use; also prepared synthetically; used for the relief of congenital hypothyroidism, and myxedema.

thyroxine, thyroxin

a hormone of the thyroid gland that contains iodine and is a derivative of the amino acid tyrosine. The chemical name for thyroxine is tetraiodothyronine (symbol, T4); it is formed and stored in the thyroid follicles as thyroglobulin, the storage form. Thyroxine is released from the gland by the action of a proteolytic enzyme. T4 is deiodinated in peripheral tissues to form tri-iodothyronine (T3), which has a greater biological activity.
Thyroxine acts as a catalyst in the body and influences a great variety of effects, including metabolic rate (oxygen consumption); growth and development; metabolism of carbohydrates, fats, proteins, electrolytes and water; vitamin requirements; reproduction; and resistance to infection.
Thyroxine can be extracted from animals or made synthetically; it is used in the treatment of hypothyroidism and some types of goiter.

free thyroxine
the metabolically active fraction of thyroxine; abbreviated FT4, Tf. T4 = Tf + TBG. The amount is very small and difficult to estimate so that the amount present in serum is not used as a more accurate indicator of thyroxine status than T4.
thyroxine-binding globulin (TBG)
most (99.95%) of the thyroxine in plasma is bound to globulin and a small amount bound to prealbumin.
thyroxine-binding prealbumin
bound to a small fraction of circulating T4. This is the only known function of prealbumins.
L-thyroxine
References in periodicals archive ?
Dependence of the thyroxin/thyroxin-binding globulin (TBG) ratio and the free thyroxin index on TBG concentrations.
The association was found to be statistically significant only in case of thyroxin.
The mean thyroxin dose in permanent primary congenital hypothyroidism group was significantly higher than transient group at the time of thyroxin cessation (2.
Such points as gallstones (fundus, cholelithiasis), glycosuria, lactose intolerance, gluten intolerance, renal failure (elevated BUN), prostate (hypertrophy), dysbiosis (colon), SIBO (small intestine bacterial overgrowth), stomach HCI (parietal cells), thyroxin, TSH, cortisol, GABA (epilepsy), dopamine, and many others.
Serum levels of triiodothyronine (T3) and thyroxin (T4) in cows were also affected significantly by environmental conditions and transition period.
While treatment for hypothyroidism is essentially taking thyroxin tablets for life, that for hyperthyroidism include medications, iodine therapy or surgery.
2) To determine the mean levels of fasting blood sugar (FBS), HbA1c, triiodothyronine, serum thyroxin, and thyroid-stimulating hormone.
Laboratory testing revealed normal thyroid-stimulating hormone, triiodothyronine (T3), and free thyroxin (T4) levels.
Serum Tri-Iodothyronine and Thyroxin Profile in Insulin Treated Preganant Goats.
Pointing out a crucial matter of absence of lifesaving drugs like Thyroxin, he said that pharmaceutical companies were not interested to manufacture this low price medicine owing to the less profit margin, adding, that it was a matter of concern and it should be highlighted in proper way.
Thus, gonadal growth, total body weights, thyroxin levels, plumage moult and the testis histological profiles were investigated under long days (18L: 6D).

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