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Biomedical subjects

T Ueha

Publications and source records attributed to T Ueha.

At least 91 records · Page 5Linked to original sources
PubMed1981

Induction of epidermal growth factor by tri-iodo-L-thyronine in the submandibular glands of mice with testicular feminization.

The content of epidermal growth factor (EGF) as a high molecular weight complex (HMW-EGF) in the submandibular glands of mice was measured simply by a single radial immunodiffusion method. In female mice, the amount of HMW-EGF was increased 10-fold by tri-iodo-L-thyronine (T3) and 60-fold by 5 alpha-dihydrotestosterone (5 alpha-DHT). In mice with testicular feminization (Tfm), which are genetically deficient in androgen receptor, T3 but not 5 alpha-DHT increased the HMW-EGF from a non-detectable level to 5.4 +/- 0.94 micrograms/mg protein. It was concluded that EGF is also synthesized under the control of thyroid hormone in vivo, and that androgen was not involved in this induction of EGF by thyroid hormone.

Androgen-Insensitivity Syndrome↗
PubMed1979

Androgenic regulation of N-acetyl beta-glucosaminidase activity in the submandibular glands of mice.

N-Acetyl beta-glucosaminidase [beta-2-acetamido-2-deoxy-D-glucoside acetylamido-deoxyglucohydrolase; EC 3.2.1.30] in the submandibular gland of mice was found to be androgen-dependent; the specific activities in males, females, and castrated males were 0.25, 0.11, and 0.11 unit/mg protein, respectively. The activities in females and castrated males were increased to the level of normal male mice by testosterone injection. Injections of progesterone and 17 beta-estradiol hardly affected the activity in males. In both males and females, the enzyme activity was detected in the convoluted tubular cells, not in acinous cells. The results of isoelectric focusing have shown that one enzyme having an isoelectric point of 9.0 is present in the glands of both sexes, indicating that the enzyme remains after castration and that the increases caused by testosterone represent the same molecular species. In addition, it was shown that the saliva from both sexes contained significant activity of N-acetyl beta-glucosaminidase, which also changed depending on the androgenic state of the animals. Most of the salivary activity was shown to originate from the submandibular gland, since the extirpation of this gland resulted in a significant decrease of the salivary activity.

Acetylglucosaminidase↗
PubMed1979

Induction of androgen-dependent protease and serous-like granules by tri-iodothyronine in the submandibular gland of mice with testicular feminization.

Esteroprotease, an androgen-dependent enzyme of the mouse submandibular gland, was increased by injection of tri-iodothyronine (T3) in mice with testicular feminization (Tfm) which are genetically deficient in androgen receptors. Histochemical and electron microscopic studies also demonstrated increases of RNA and serous-like granules in cells of the convoluted tubules of the gland. These findings suggest that the esteroprotease gene in Tfm mice is normal and that T3 can induced both esteroprotease and serous-like granules independently of androgen.

Androgen-Insensitivity Syndrome↗
PubMed1978

Sex difference in L-glutamine D-fructose-6-phosphate aminotransferase activity of mouse submandibular gland.

L-Glutamine D-fructose-6-phosphate aminotransferase (2-amino-2-deoxy-D-glucose-6-phosphate ketol-isomerase (amino-transferring), EC 5.3.1.19) activities in the three main salivary glands of male and female mice were measured. It was found that the activity in the submandibular gland was about 10 times more in females than in males, whereas the activities in the sublingual and parotid glands of males and females were similar. The activity in the submandibular gland of female mice was not affected appreciably by ovariectomy but it decreased to the level in males on injection of testosterone. The activity in males was not affected appreciably by injection of progesterone or 17beta-estradiol, but it increased to the level in females after castration. The increased activity in castrated male mice was decreased again to the normal level by testosterone injection. Thus, this sex difference is caused by androgen, not by female hormones. On the basis of in vivo experiments using actinomycin D, it was suggested that testosterone produced an "enzyme inhibitor", which suppressed the enzyme activity in the submandibular glands of androgen-rich animals.

Animals↗
PubMed1978

Effect of autonomic agents on the amount of androgen-dependent granules in convoluted tubular cells of the mouse submandibular gland.

The convoluted tubular cells of the male mouse submandibular gland contain many serous-like granules in their apical cytoplasm. The autonomic regulation of the secretory process of the contents of these granules was studied by the following two methods: (1) immunochemical method using an antiserum specific to the granular components; and (2) histometric observations using light and electron microscopes. The results obtained by these two methods were well in agreement. When male mice were administered either phenylephrine or norepinephrine, the amount of granules in the glands significantly decreased. These two adrenergic stimulators were very effective, whereas synephrine was less effective. When mice were injected with a beta-adrenergic agent(isoproterenol) or a parasympathomimetic agent (pilocarpine), the amount of granules in the glands did not change. The alpha-adrenergic blockers phenoxybenzamine and phentolamine almost completely neutralized the effect of alpha-adrenergic agents on the glands, whereas another alpha-blocker (ergotamine) was less effective. These facts suggest that the secretion of the granular components is mediated by way of alpha-adrenergic receptor sites in the glands.

Adrenergic alpha-Agonists↗
PubMed1978

Regulation of the secretory process of granular components from the convoluted tubular cells of the mouse submandibular gland.

Autonomic regulation of the secretion of granule components in the convoluted tubular cells of male mouse submandibular glands was investigated with the use of an agar gel diffusion test using an antisera for male specific components. Whereas the injection of neither a parasympathomimetic agent (pilocarpine) nor a beta-adrenergic agent (isoproterenol) decreased the amount of the components in the glands, the injection of alpha-adrenergic agents (norepinephrine or phenylephrine) significantly decreased the amount of male specific components. Phenoxybenzamine, an alpha-blocker, completely inhibited these actions of norepinephrine and phenylephrine. These facts suggest that the alpha-adrenergic receptor participates in the secretion of male specific components present in the granules in the convoluted tubular cells of mouse submandibular glands.

Animals↗