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Biomedical subjects

Y Hirose

Publications and source records attributed to Y Hirose.

At least 325 records · Page 18Linked to original sources
PubMed1985

[Effect of combined use of adrenocortical hormones and domperidone as anti-emetics during cisplatin therapy].

Eighteen patients received repeated administrations of cisplatin in relatively large amounts (55-75-100 mg/m2) given systemically by drop infusion. As antiemetic treatments, the following were scheduled: on the day before; prednisolone 30mg (3 X p.o.), immediately before; methylprednisolone 500mg (i.v.), and 3 hours after administration of cisplatin ; methylprednisolone 500mg (i.v.) and domperidone 60 mg (suppo.). Domperidone was given twice a day for one week. Nausea, vomiting and anorexia were studied objectively for two weeks. At a dose of 75 mg/m2 of cisplatin, the occurrence and the duration of nausea and vomiting were effectively reduced by the regimen; nausea was observed in 67% of all cases (average duration: 3.3 days) and vomiting was experienced in 40% (1.2 days). Anorexia was observed in 67% of cases and lasted longer (5.2 days). The severity and duration of these side effects of nausea, vomiting and anorexia seemed to appear in a manner related to the dose of cisplatin given, but even at a dose of 100 mg/m2, the regimen described above reduced the patients' discomfort to acceptable levels. No remarkable side effect of this anti-emetic regimen was evident.

Adult↗
PubMed1984

Measurement of urinary estrogen level with the urinary estrogen micrometry method in in vitro fertilization and embryo transfer therapy.

We have evaluated a new micrometering kit using hemagglutination inhibition reaction for determination of total estrogens in urine of normal fertile women and women undergoing in vitro fertilization and embryo transfer (IVF-ET). The micrometering kit was sensitive enough to monitor follicular maturation, and its technique was simple and rapid. Results were obtained in 2.5 hours. By the analysis of the individual estrogen levels in urine collected every 4 hours from 20 IVF-ET patients, the following results were found, with a few exceptions: once the level had exceeded 60 ng/ml, the onset of the luteinizing hormone surge was induced within the next 72 hours; when the level had been under 60 ng/ml, the onset was not induced within the next 24 hours

Adult↗
PubMed1984

Effects of pulmonary congestion on airway reactivity to histamine aerosol in dogs.

We examined the effect of acute pulmonary vascular congestion on bronchial reactivity in dogs in a standard challenge protocol. Airway responsiveness to histamine whose concentration was varied in a stepwise incremental fashion was assessed from changes in pulmonary resistance (RL) and dynamic compliance (Cdyn) in 10 anesthetized dogs. Brief acute pulmonary congestion was created by inflating a balloon placed in the left atrium to raise left atrial pressure to 20-30 cmH2O for 1 min. Pulmonary congestion did not change RL in the control condition. However, after histamine inhalation, RL was further increased by pulmonary congestion, making the two effects synergistic. This phenomenon could not be observed with vagi cut. Pulmonary congestion decreased Cdyn in all dogs regardless of histamine concentration, with or without vagotomy. We conclude that pulmonary vascular congestion makes the bronchi hyperreactive through vagal reflexes. The reduction in Cdyn caused by pulmonary congestion appears to stem mainly from the narrowing of peripheral airways by adjacent vascular engorgement.

Aerosols↗
PubMed1984

Electron microscopic study of cell lines established from adult T-cell leukemia--coexistence of adult T-cell leukemia virus and Epstein-Barr virus.

Six cell lines established from five patients with adult T-cell leukemia (ATL) were studied by electron microscopy. From one patient two cell lines were established, an interleukin 2-dependent line and a nondependent line. The interleukin 2-dependent T-cell line had only ATL virus (ATLV) particles. The interleukin 2-nondependent B-cell line had both ATLV particles and Epstein-Barr virus (EBV) particles. In two other B-cell lines and one undetermined cell line, both ATLV particles and EBV particles were seen. In one B-cell line only a few EBV particles were seen. These findings suggest that (1) interleukin 2 is necessary for the growth of leukemic T-cells from ATL tissue samples, and (2) ATLV can infect not only T-cells but also B-cells.

Adult↗
PubMed1984

Adult T-cell leukemia-lymphoma in the Hokuriku District and presentation of a case in hematological remission after cryptococcus infection.

Ten cases of adult T-cell leukemia-lymphoma (ATL/L) in the Hokuriku district were studied. Five patients were born in endemic areas and later moved to Hokuriku. Five patients were from nonendemic areas, and have not lived in endemic areas. All of the five patients from nonendemic areas had antibody to the adult T-cell leukemia cell-associated antigen (anti-ATLA), and they had anti-ATLA-positive members in their families. Four of the six patients examined had ATL virus (ATLV) proviral DNA in their leukemic cells and type C virus particles were found in the cultured cell line from one of them (case S.D.). The incidence of anti-ATLA in the control population was 0.93% in Ishikawa Prefecture, 0.39% in Toyama Prefecture and 0% in Fukui Prefecture. The overall positive rate in the controls in Hokuriku was 0.49%. The rate of positive anti-ATLA among family members of seven ATL patients (patients are excluded) was 43.5% (17/39). The pedigree study of ATL patients very strongly suggested transmission of ATLV between spouses and transmission from mother to children. We also report a case of ATL from an endemic area, who has been in remission without antileukemic therapy for about one year. He is on 5 FC (5-fluorocytosine), Minomycin (minocycline hydrochloride), and Baktar (trimethoprim-sulfamethoxazole). Possibility that the therapeutic effect of 5 FC on ATL or the remission is due to enhanced cellular immunity after cryptococcus infection is discussed.

Adult↗
PubMed1983

[Experimental study on diabetes and pregnancy: with special reference to the effects of insulin treatment on fetuses of diabetic dams].

Through the development of treatment of diabetes mellitus, diabetic cases of pregnancy have been increasing, and the effects of maternal hyperglycemia and insulin-treated hypoglycemia on the growth and life of fetuses and newborns are becoming very important problems. However, it is difficult for us to investigate the fetuses of human diabetic mothers as experimental models. Although many reports deal with the development of newborns of diabetic mothers and about their secretory changes of insulin and C-peptide reactivity, there have been few reports concerning the effects of severe diabetes on pregnancy and the effects of insulin treatment on fetuses. Concerning experimental animals, there are also few reports about the effects of insulin treatment on diabetic pregnant animals. We conducted the present investigation to determine the effects of insulin treatment on the growth and metabolism of the fetuses of diabetic pregnant rats. Virgin female Wistar rats weighing 200 approximately 300 g were caged overnight with male rats. The mated females were isolated and the gestational age was calculated from noon of this day (zero). Seventeen of 24 pregnant rats received a rapid intravenous injection of 50 mg/kg body weight of streptozotocin (STZ) in 0.4 ml of 0.01 M citrate buffer (pH 4.5) immediately after blood samples were collected through the jugular vein under light ether anaesthesia on the 5th day of gestation. Seven pregnant rats were injected with only 0.4 ml of citrate buffer and served as the controls. These rats were divided into four groups, and each group was named as follows: Normal pregnant rats group (group I, n = 7), diabetic pregnant rats group (group II, n = 6) and insulin-treated diabetic pregnant rats group (group III: plasma glucose level 60 approximately 300 mg/dl, n = 6 and group IV: plasma glucose level below 60 mg/dl, n = 5). Group III and IV rats were treated with a subcutaneous injection of Lente Insulin (from 2 u. to 6 u.) every day from the 13th to the 19th day of gestation. Group II rats were injected with saline every day in the same way. Maternal blood samples were collected under light ether anaesthesia after feeding ad libitum on the 5th and 12th days of gestation. On the 20th day of gestation, the pregnant rats were anaesthetized by an intraperitoneal injection of sodium pentobarbital, and blood samples were collected in the manner stated above. Each fetus and placenta was taken out individually by hysterotomy.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗
PubMed1983

Mutagenic activities of gentisin and isogentisin from Gentianae radix (Gentianaceae).

The mutagenic activities of 2 hydroxyxanthones, gentisin and isogentisin, obtained from the methanol extract of Gentianae radix (Gentianaceae) were investigated. The methanol extract of Gentianae radix, which showed mutagenicity in the Ames test in Salmonella typhimurium strain TA100 with S9 mix, was fractionated by column chromatography on Sephadex LH-20, and the fractions were purified by preparative TLC and column chromatography on polyamide. 2 mutagenic materials thus obtained, S1 and S2, each gave a single band on TLC. Identification of S1 and S2 was accomplished by comparing the analytical (mps, elementary analyses) and spectral (UV, IR, mass, NMR) results for S1 and S2 with literature data for gentisin and isogentisin. At doses below 10 micrograms, S1 (gentisin) and S2 (isogentisin) had similar specific mutagenic activities. At doses of over 10 to 50 micrograms, the mutagenic activities of S2 and S1 were 19.1 and 6.94 revertants per microgram respectively. This much lower activity of S1 than S2 may be a result of its poor solubility owing to the presence of the OMe group at C-3. The combined yield of S1 and S2 was about 76 mg (40 mg as S1 and 36 mg as S2), which accounted for 76% of the content of mutagenic compounds (100 mg) estimated roughly from the total mutagenic activity in the extract of the starting materials (100 g).

Animals↗
PubMed1983

Syntheses of optically active amino acids by the combination of chemical methods and microbial techniques.

The newly developed processes combining the advantages of chemical methods and microbial techniques brought about optically active amino acids (D- or L-) from racemic compounds. In all cases, the other isomer of substrates (L- or D-) that cannot be catalyzed by hydrolyzing enzymes were easily racemized under reaction conditions. Then, optically active amino acids were produced quantitatively from the racemic compounds.

Amino Acids↗