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Biomedical subjects

S Suwa

Publications and source records attributed to S Suwa.

At least 91 records · Page 5Linked to original sources
PubMed1979

C26 sterol in a human urine.

A new C26 sterol, 22-trans-27-norcholesta-5,22-dien-3 beta-ol, was found in the urine of a 6-year-old girl, with a clinical diagnosis of congenital adrenal hyperplasia of the salt losing type, accompanied by symptoms of mixed sex anatomy and skin pigmentation. The structure of the sterol was determined by comparison with the synthetic compound. The sterol was also detected in ther serum. This appears to be the first case in which a C26 sterol has occurred in mammalia.

Adrenocortical Hyperfunction↗
PubMed1979

A new method of urea removal using urease and expanded polytetrafluoroethylene membrane.

A new method for urea removal using a gas membrane is introduced along with some preliminary results. The membrane used was expanded polytetrafluoroethylene (E-PTFE) which is highly permeable to gaseous substances, while at the same time it is highly resistant to water permeation. In in vitro experiments using 10 mmol/L ammonia solution it was revealed that the single-pass reduction rate was approximately 95% at 30 degrees C at a flow rate of 200 ml/min. In animal experiments using four dogs, the extraction rate of urea was 40.4 +/- 4.4% after four hours of dialysis using 5 L dialysate. However, elevation of blood ammonia was observed in all dogs tested. Removal of ammonia by means of a gas membrane is considered to be feasible and has the possibility of being used for maintenance hemodialysis in combination with urease and charcoal.

Ammonia↗
PubMed1978

The effect of alpha adrenergic receptor blockade on the glucagon-induced growth hormone response.

The effect of a alpha adrenergic blockade (phentolamine) on glucagon induced growth hormone response was tested in five normal men. There was no significant difference in growth hormone concentrations between the glucagon test and the glucagon-phentolamine test (mean maximum level, 23.4 +/- 3.7 ng/ml and 23.1 +/- 5.9 ng/ml, respectively). Insulin secretion was significantly higher (P less than 0.025) 30 and 60 min after an injection of glucagon in the glucagon-phentolamine test. The results suggest that the stimulation of growth hormone secretion by glucagon is not mediated through an alpha adrenergic mechanism.

Adult↗
PubMed1977

Neonatal hypophosphatasia with elevated serum parathyroid hormone.

Two cases of neonatal hypophosphatasia are described. In case 1, hypercalcemia developed at 2 1/2 months of age and continued until death at 10 1/2 months of age. Serum calcium levels decreased transiently in response to phosphate supplementation, prednisolone, and calcitonin. Significantly elevated levels of PTH were detected at 2 1/2 months of age. At autopsy, no parathyroid glands were found. In case 2, hypercalcemia was not detected in his course. Elevated level of serum PTH was recorded on the 17th day of life. A post-mortem examination revealed the presence of one normal parathyroid gland.

Autopsy↗
PubMed1977

A case of McCune-Albright syndrome with hyperthyroidism and vitamin D-resistant rickets.

A girl aged 1 11/12 year with the unusual combination of McCune-Albright syndrome (polyostotic fibrous dysplasia, cutaneous pigmentation and precocious puberty), hyperthyroidism and vitamin D-resistant rickets is described. Urinary estrogens are increased, while serum LH and FSH responses to LH-RH are subnormal. Thyroid hormone levels in serum and 131I thyroidal uptake are increased, while TSH response to TRH is decreased. Serum phosphorus level is low and phosphate clearance high, while PTH is within normal range. Basal GH level and GH responses to various stimulations are high, but high basal GH is suppressed by oral glucose. The oral glucose tolerance test shows normal blood glucose with hypersecretion of insulin. These data suggest that the common pathogenesis of the various aspects of the syndrome is a hypersensitivity of the target organs, which include the pituitary, the thyroid, the gonads, the pancreatic islet cells and the proximal tubules of the kidney.

Female↗