Search PubMed⌕ Search

Biomedical subjects

S Oishi

Publications and source records attributed to S Oishi.

At least 109 records · Page 6Linked to original sources
PubMed1984

Effects of di-2-ethylhexyl phthalate on lipid composition of serum and testis in rats.

Dietary administration of di-2-ethylhexyl phthalate (DEHP; 2%) to male rats caused testicular atrophy. Serum non-esterified fatty acid increased while cholesterol, triglyceride and phospholipid decreased in treated rats. Testicular concentration of cholesterol and non-esterified fatty acid increased in DEHP-treated rats. Fatty acid composition of phospholipid and triglyceride were also changed. These changes were similar to those in rats fed a zinc(Zn)-deficient diet.

Animals↗
PubMed1984

Testicular atrophy of rats induced by di-2-ethylhexyl phthalate: effects of vitamin A and zinc concentrations in the testis, liver and serum.

Dietary administration of di-2-ethylhexyl phthalate (DEHP, 2% in diet) for 1 week to young male Wistar rats was found to cause testicular atrophy. Zinc (Zn) concentration in the testis and liver of DEHP-treated rats was lower than that in controls. Vitamin A concentration in serum and testis was increased in DEHP-treated rats. These results suggest that testicular atrophy induced by DEHP was not due to dietary or intrinsic vitamin A deficiency.

Animals↗
PubMed1984

Treatment of advanced breast cancer with two doxorubicin-containing regimens.

The Georgetown University Hospital experience in the treatment of advanced breast cancer using either a combination of doxorubicin (adriamycin) and vincristine (AV) or adriamycin and mitomycin-C (AM) is presented. Of 74 previously treated patients with advanced breast cancer, 50 patients were given AV and 24 patients were given AM. Both groups were comparable in regard to number of disease sites, age, prior radiation therapy, disease-free interval after mastectomy, duration of treatment, and estrogen-receptor status. The response rates were 32% and 25% with AV and AM combinations, respectively. Achievement of response was not related to menopausal or estrogen-receptor status. Median time to disease progression was 7.0 and 9.6 months for AV and AM, respectively. Median survivals were not statistically different (9.7 months for AV and 11.1 months for AM). Life-table analysis for responders versus nonresponders within each regimen and between responders in either regimen revealed no statistical differences. Duration of response for each regimen was also equivalent. Toxicity was mild and similar to previous reports using these drugs. However, myelosuppression was significantly greater for premenopausal than postmenopausal patients in the AV group. The possible reasons for this are discussed. Both AM and AV are well-tolerated regimens which provide equivalent but limited response rates, duration of response, and median survival in previously treated women with advanced breast cancer.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1984

Elevated serum calcitonin levels in patients with thyroid disorders.

Serum calcitonin was measured by radioimmunoassay (RIA) in 63 patients with hyperthyroidism, 37 with hypothyroidism, 9 with surgically proven medullary thyroid carcinoma (MTC) and 81 normal subjects. Provocative tests of calcitonin by calcium infusion were performed in 11 with hyperthyroidism, 10 with hypothyroidism, 6 with MTC and 14 normal subjects. Changes of calcitonin were also studied before and after treatment in 17 patients with hyperthyroidism and 12 with hypothyroidism. The basal calcitonin levels were increased in both hyperthyroidism (117 +/- 60.1 pg/ml (mean +/- SD): n = 63, P less than 0.001) and hypothyroidism (137 +/- 107 pg/ml, n = 37, P less than 0.001), and significantly increased in MTC 14 765 +/- 25 039 pg/ml, range 390 to 70 400 pg/ml, n = 9, P less than 0.001) compared with those in normal subjects (45.8 +/- 22.3 pg/ml, n = 81). Increases of calcitonin during calcium load (iv 4.5 mg calcium/kg for 10 min) were significantly lower in both hyperthyroidism and hypothyroidism patients than in those in MTC. The calcitonin levels were not correlated with the serum T3, T4, TSH concentrations or titres of serum antithyroid antibodies in hyperthyroidism and hypothyroidism. We found some tendency toward decreasing calcitonin levels with the euthyroid state after treatment in both groups, but the changes were not significant. Although exact mechanisms of increased calcitonin in hyperthyroidism and hypothyroidism were not clear, our findings suggest that a 2- to 3-fold elevation of calcitonin levels in these patients did not indicate malignancy; MTC could be readily differentiated by a calcium infusion test.

Adolescent↗
PubMed1983

Causes of European emigration to the United States. A humanistic approach.

During the nineteenth century and the first quarter of the twentieth century around thirty million people emigrated from Europe to the United States. Causes of these vast movements of people are explained in this paper. The three main causes were a rapid increase in population, class rule and economic modernization. Personal reasons are mentioned and discrimination against religious and ethnic minority groups are touched upon. Two inventions, the steamship and the railroad are referred to insofar as they helped the emigrants and were a cause of hardship for the poor people of Europe. Although causes of emigration fall under the heading of historical facts, they are considered in this paper as causes of suffering for the destitute of Europe who made up the largest number of emigrants to the United States.

Emigration and Immigration↗
PubMed1983

[Case of intrathoracic pheochromocytoma occurring 9 years after resection of intraabdominal paraaortic pheochromocytoma: effect of metoclopramide and sulpiride on catecholamine secretion in vitro].

A 29-year-old female who had undergone resection of an abdominal paraaortic pheochromocytoma weighing 33 g at the age of 20 had had severe headaches, hypertension and hyperhidrosis 3 years prior to the surgery. Postoperatively, her symptoms completely disappeared and urinary catecholamines were normalized. She was well and had married and had had 2 children. She was admitted to our hospital on August 22, 1982, for further evaluation of hypertension (154/100), which had been diagnosed 2 months previously. Endocrinological studies confirming the presence of a pheochromocytoma were as follows: 1) Plasma noradrenaline level was significantly elevated to 1750 pg/ml. 2) Urinary catecholamine and their metabolites (Metanephrines and VMA) were markedly elevated. Her blood pressure was borderline hypertension and its diurnal rhythm was lost. Her blood pressure decreased to normal values after the oral administration of labetalol (100 mg). Plasma noradrenaline level was still high at 180 minutes after the oral administration of clonidine (150 micrograms). Hypertensive response to insulin-induced hypoglycemia (regular insulin 0.1 u/kg i.v.) was observed, but blood pressure returned to normal after the infusion of glucose alone. Hypertensive response to both metoclopramide (5 mg i.v.) and sulpiride (50 mg per os) was observed accompanying the significant elevation of plasma noradrenaline. Computed tomography and ultrasonography revealed a tumor localized between the aorta and the vena cava inferior. Selective venous sampling also revealed an intrathoracic pheochromocytoma. On October 8, 1982, a 28 g mass was removed from the mediastinum just above the diaphragma. Histologically, it was typical of a pheochromocytoma. Electron microscopy showed large polygonal cells with numerous large secretory granules characteristic of noradrenaline-granules. Postoperative blood pressure was normal, but repeated measurements of plasma and urinary catecholamines were still slightly high. We, therefore, followed her case carefully at our out-patient clinic. In order to clarify the mechanism of catecholamine release by metoclopramide and sulpiride, tissue cultures of removed pheochromocytoma with and without these drugs were carried out. The in vitro studies revealed that metoclopramide released noradrenaline eight-fold and sulpiride 13-fold as compared with noradrenaline in a control medium. We concluded that both drugs stimulated catecholamine secretion directly from the tumor and thus, careless administration of these drugs should be avoided when pheochromocytoma was suspected, large or small. Finally, the rate of tumor growth seemed to be very slow because it took 9 years to ach

Abdominal Neoplasms↗
PubMed1983

Testicular atrophy induced by di-2-ethylhexyl phthalate: effect of zinc supplement.

The administration of di-2-ethylhexyl phthalate (DEHP) to young male rats was found to cause testicular atrophy and loss of testicular zinc. In an attempt to test the hypothesis that a cause and effect relationship exists between DEHP-induced loss of testicular zinc and testicular injury, zinc was coadministered (by ip injection or by dietary supplementation) with DEHP (po) for 10 days and organ weights and zinc concentrations were then measured. This testicular atrophy was not prevented by coadministration of zinc. The zinc concentration in the testis was not increased by zinc supplement despite increases in zinc concentrations in liver and serum. The results suggest that the toxic effect of DEHP on the testis may not result from an interference with gastrointestinal absorption of zinc.

Animals↗
PubMed1983

Tissue distribution and elimination of chlorinated naphthalenes in mice.

Male pathogen-free JCL:ICR mice were dosed i.p. 1 mg of 1,8-and 2,7-dichloronaphthalenes and octachloronaphthalene dissolved in olive oil. The highest levels of all chlorinated naphthalenes were found in adipose tissue. The biological half-life of octachloronaphthalene was longer than both dichloronaphthalenes while the half-life of 2,7-dichloronaphthalene was longer than that of 1,8-dichloronaphthalene in most tissues.

Animals↗
PubMed1982

Effects of monoesters of O-phthalic acid on serum lipid composition of rats.

Male rats were administered diets containing monobutyl (MBP), mono-iso-butyl (MIBP), monooctyl (MOP) or mono-2-ethylhexyl phthalate (MEHP) for 1 week, and serum lipid compositions were determined. Non-esterified fatty acid was increased and triglycerides and total cholesterol were decreased in all monoester-treated groups. Fatty acid composition of triglycerides, cholesteryl esters and phospholipids showed similar alteration in the treated groups.

Animals↗
PubMed1982

Toxicity of several phosphoric acid esters in rats.

JCL--Wistar male rats were fed a diet containing 0 or 0.5% of trimethyl phosphate (TMP), triethyl phosphate (TEP), tri-n-butyl phosphate (TBP), trioctyl phosphate (TOP), or tricresyl phosphate (TCP) for 9 weeks. Body weights in TMP- and TBP-treated rats were significantly lower than the control. No differences in toxicity were observed among the test compounds, although there were differences between the treated and control rats in some organ weights, hematological values and serum components.

Animals↗
PubMed1982

Toxic substance from a natural bloom of Microcystis aeruginosa.

A toxic substance contained in the blue-green alga Microcystis aeruginosa was purified and partially characterized. Toxic algal cells were collected from a highly eutrophic lake in Japan, and the toxin was purified by homogenization, ultrafiltration, gel filtration, and ion-exchange chromatography. The final preparation gave a single peak on high-performance liquid chromatography. The toxicity was somewhat less than that reported for other toxins from this alga. The water extract of 6.7 mg (dry weight) of cells and 72 microgram of the purified protein was required to kill a mouse (1 mouse unit). The main amino acids of the toxin were glutamic acid, asparatic acid, alanine, glycine, arginine, and leucine. The molecular weight of the toxin was 2,950 as determined by high-performance liquid chromatography.

Amino Acids↗
PubMed1982

[Clinical evaluation of cefoxitin in treatment of infections in obstetric and gynecologic field (author's transl)].

Ten patients (8 with moderate or severe infections, 2 for prevention of postoperative infections) were treated with cefoxitin. The patients were given cefoxitin of 2 approximately 9 g, given once, or in 2 approximately 3 divided doses. Clinical efficacy was good in 7 cases, fair in 2 and poor in 1. Transient nausea and vomiting occurred in 1 patient when a direct intrauterine injection (1 g of cefoxitin) was given, however, no side effects were observed in the other patients. The result of this study demonstrates that cefoxitin when given massively is effective in achieving bacteriologic and clinical cure in treatment of infections and for prevention of postoperative infections in the field of obstetrics and gynecology.

Adult↗
PubMed1980

Random one-hour urine catecholamine and 4-hydroxy-3-methoxymandelic acid assays for diagnosis of pheochromocytoma.

Using randomly voided 1-h urine samples, levels of excretion of catecholamines (CA) and 4-hydroxy-3-methoxymandelic acid (vanillylmandelic acid; VMA) were determined in order to save time in and simplify the diagnostic work-up of pheochromocytoma, particularly in out-patient hypertension clinics. Twenty-nine patients with surgically verified pheochromocytoma (15 paroxysmal and 14 sustained type), 56 patients with essential hypertension (26 labile and 30 fixed type) and 14 normal volunteers were studied. Abnormally high excretion of CA and VMA was found in all patients with pheochromocytoma when compared to those with essential hypertension or to normal controls after duly considering the influence of external factors such as food and exercise. From these results, we concluded that assays of CA and VMA even in random 1-h urine samples are useful in separating patients with pheochromocytoma from those with other types of hypertension.

Adolescent↗