منابع مشابه
Action of rat submaxillary gland extracts on neural tube growth in organ culture.
FOR a long time embryologists have been interested in mechanisms which control growth of the neural tube. The results of experiments made on amphibian and chick embryos suggested that the differential growth of different portions of the neural tube is dependent both on genetic factors and on the degree of development of peripheral tissues (see Weiss, 1955). The mechanism of this peripheral acti...
متن کاملMelatonin formation in rat pineal gland organ culture: induction by an adrenergic beta 2-stimulating drug.
It is well known that the pineal gland hormone melatonin has a direct effect on pigment dispersion in amphibian melanocytes. This pineal hormone has also been reported to influence pituitary melanocyte-stimulating hormone (MSH) activity in the rat. Melatonin is formed from serotonin (5-hydroxytryptamine) in two metabolic steps: first, serotonin is enzymatically metabolized by N-acetyltransferas...
متن کاملParathyroid gland volume increases with postmaturational aging in the rat.
To examine the pathophysiology of the age-related rise in the plasma concentration of parathyroid hormone (PTH), we studied the relationships among plasma immunoreactive PTH (iPTH), parathyroid gland volume, parathyroid cell proliferation rate, renal function, and blood Ca(2+) in male Fischer 344 rats aged 6-28 mo. Plasma iPTH increased 2.5-fold between 6 and 28 mo and correlated with parathyro...
متن کاملUltrastructure of the parathyroid gland.
Since the first detailed description of the parathyroid glands, reported in human beings by Sandstrom in 1880, and Lever first described the ultrastructure of the parathyroid chief cells of rat in 1957, a large number of histological and ultrastructural studies have been done on the parathyroid glands of numerous animal species under normal and experimental conditions. The biological function o...
متن کاملThe carcinoma of parathyroid gland.
Parathyroid carcinoma constitutes less than 1% of primary hyperparathyroidism. The exact etiology is not known. Prior radiation to neck, chronic renal failure and genetic factors are thought to play a role. The male to female ratio is one. Parathyroid carcinomas are slow growing, have a tendency to recur locally and metastasize late. 95% of parathyroid carcinomas are functioning. The major dist...
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ژورنال
عنوان ژورنال: Folia Endocrinologica Japonica
سال: 1973
ISSN: 0029-0661
DOI: 10.1507/endocrine1927.49.4_707