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Biomedical subjects

H Shishido

Publications and source records attributed to H Shishido.

At least 127 records · Page 7Linked to original sources
PubMed1985

Syntheses and effects of a thymopoietin II fragment and its analogs on the impaired T-cell transformation in a patient with common variable immunodeficiency.

A tetradecapeptide, H-Arg-Lys-Asp-Val-Tyr-Val-Glu-Leu-Tyr-Leu-Gln-Ser-Leu-Thr-OH, corresponding to amino acids 32 to 45 of thymopoietin II and its six analogs by replacing the amino acid residue in position 37, was prepared. These peptides were synthesized using conventional synthesis in solution and were tested for their effect on impaired T-cell transformation by phytohemagglutinin (PHA) in the common variable immunodeficiency. The tetradecapeptide had increasing activity on the T-cell transformation by PHA. Among the tetradecapeptide analogs, several analogs in which Val37 was replaced by Leu or Phe exhibited potent activity which was more than that of the parent peptide fragment. On the other hand, replacement of Val37 by Pro, beta Ala, or sarcosine had no effect at concentrations as high as 3.5 X 10(-4) M. One analog whose Val37 was replaced by Gly showed activity one-third that of the parent peptide fragment. On the basis of these results, the structure-activity relationship for the tetradecapeptide is discussed.

Amino Acid Sequence↗
PubMed1985

[In vitro study on the combined effect of mezlocillin and sisomicin on clinically pathogenic P. aeruginosa and E. coli].

Clinically pathogenic Pseudomonas aeruginosa and Escherichia coli were subjected to test in vitro combination effect of mezlocillin (MZPC) and sisomicin (SISO). The chequer board titration method, using brain heart infusion broth (BHIB, Difco), demonstrated the combination effect of MZPC and SISO on the both isolates. The bactericidal combination effects (MBCs) were clearly higher than the bacteriostatic combination effects (MICs). The bactericidal activities of combination with MZPC and SISO were tested on both P. aeruginosa and E. coli. The MZPC plus SISO of low concentrations showed the synergistic effects on both isolates.

Aged↗
PubMed1985

[Pharmacokinetic and clinical evaluations of micronomicin by intravenous drip infusion].

The safety and pharmacokinetics of micronomicin (MCR) by intravenous drip infusion were evaluated and the intravenous drip infusion of MCR was carried out on several cases on which the blood levels and clinical usefulness of MCR were investigated. Five healthy adult male volunteers received by crossover method 1 hour intravenous drip infusion of MCR in doses of 60 and 120 mg and intramuscular injection in a dose of 120 mg. The mean highest serum level was 6.3 micrograms/ml by intravenous drip infusion of 60 mg, 10.7 micrograms/ml by intravenous drip infusion of 120 mg, and 10.3 micrograms/ml by intramuscular injection of 120 mg. Serum levels of MCR were similar for intravenous drip infusion and intramuscular injection of 120 mg of MCR. The biological serum half-lives of MCR were 2.15 hours by 1 hour intravenous drip infusion of 60 mg, 2.54 hours by 1 hour intravenous drip infusion of 120 mg, and 1.59 hours by intramuscular injection of 120 mg. The mean urinary recovery rates within 24 hours after administration were 74.3% by 1 hour intravenous drip infusion of 60 mg, 59.6% by 1 hour intravenous drip infusion of 120 mg, and 64.9% by intramuscular injection of 120 mg, the results being nearly consistent. In all treatment groups, MCR could be safely administered. Intravenous drip infusion of MCR in a dose of 60 or 120 mg once or twice a day was conducted on a total of 6 cases consisting of 2 cases of pneumonia and 4 cases of urinary tract infections.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1985

[Safety and pharmacology of aspoxicillin in healthy volunteers].

Aspoxicillin (ASPC), a new injectable semisynthetic penicillin, was administered to healthy volunteers to elucidate its safety and pharmacokinetics. No abnormalities obviously attributable to ASPC were observed in the examinations covering subjective and objective symptoms, blood pressure, heart rate, respiratory rate, electrocardiogram and body temperature, as well as in hematology, blood chemistry and urinalysis. There were slight increase in LDH (1 case), Al-P (1 case) and blood-glucose levels (2 cases) at 2 or 4 weeks after the administration with intravenous bolus consecutive injection (1 g X 1 or 2/day, 8 to 10 times), but these increases were not considered to be attributable to ASPC. When ASPC was administered by consecutive intravenous bolus injection, there observed no tendency of accumulation of the drug in serum or urine. When 1 g of ASPC was given intramuscular (i.m.), intravenous injection (i.v.) and intravenous drip infusion (d.i.) route, the maximum antibiotic levels in serum reached 25.2 micrograms/ml, 118.2 micrograms/ml and 70.3 micrograms/ml at 0.75 hour, 0.08 hour and 1 hour after the administration, respectively. The biological half-lives of ASPC attained by these 3 different routes were as follows: 1.73 hours (i.m.), 1.65 hours (i.v.) and 1.44 hours (d.i.). In a cross-over test with piperacillin (PIPC), serum levels of ASPC were higher than those of PIPC and half-lives of ASPC were longer. The 8 hours urinary recovery of ASPC was 75.9% after intravenous injection, 74.6% after intramuscular injection and 88.0% after intravenous drip infusion. Most of urinary recovery was excreted within 4 hours after administration regardless of dose levels, frequency of dosing or administration route. Thin layer chromatographic bioautography was conducted with the samples of serum and urine collected from subjects received ASPC. No antibacterial metabolite was observed in the serum obtained 2 hours after administration but a metabolite identified as amoxicillin was detected in a part of urine samples collected after 8 to 10 hours after the injection.

Adult↗
PubMed1984

Effects of fish oil rich in eicosapentaenoic acid on serum lipid in hyperlipidemic hemodialysis patients.

The incidence of atherosclerosis in hemodialysis (HD) patients is very high. Major risk factors are aging, lipid metabolism disturbances, high blood pressure, and smoking. High blood pressure and hypertriglyceridemia, which is atherogenic in the presence of smoking, are encountered very often in HD patients. The effects of eicosapentaenoic acid (EPA) on plasma lipids and blood pressure were studied for the first time in HD patients by the administration of capsules containing fish oil rich in EPA, which is known to lower serum lipid concentration and blood pressure. We treated 12 hyperlipidemic patients (3 of type IIa, 3 of type IIb, and 6 of type IV; 3 males, 9 females; 31 to 70 years of age; 4 to 90 months on HD) with 24 capsules (1.6 g EPA and 1.0 g docosahexaenoic acid) per day for 13 weeks. Serum triglycerides, total cholesterol, and phospholipid decreased significantly after capsule administration. The ratio of EPA to arachidonic acid in serum increased significantly. There was a small but statistically significant decrease in platelet count. Diastolic blood pressure decreased at the end of the experiment. These effects of fish oil are considered favorable for the prevention of atherosclerosis and its subsequent diseases.

Adult↗
PubMed1984

Strong association of idiopathic membranous nephropathy with HLA-DR2 and MT1 in Japanese.

HLA-A, B, DR, and MT antigens were examined in 50 patients with idiopathic membranous nephropathy (IMN) by the standard microlymphocytotoxicity technique. The frequency of HLA-DR2 was significantly increased in the patients in comparison to the controls. Significant decreases in the frequencies were seen for HLA-DR4, DRw8 and DRw9 in the patients. The linkage disequilibrium between HLA-Bw52 and DR2 was noted in the controls, but it was significantly weaker in the patients. The frequency of MT1 was significantly higher, and that of MT3 was significantly lower in the patients as compared with the controls. The findings suggest that an immunological disturbance under the influence of genetic factors may confer a susceptibility to IMN.

Adult↗
PubMed1983

Increase in blood viscosity due to alcohol drinking.

To elucidate the effects of alcohol on thrombotic diseases we focussed on blood rheology which is one of the most important factors of blood flow. We measured the viscosity of whole blood and plasma of 18 healthy volunteers (11 males and 7 females) before and after drinking at a dinner party. There were significant increases in whole blood viscosity (7.4%, P less than 0.005) and plasma viscosity (3.0%, P less than 0.005) after drinking. Judging from the significant correlations between changes in blood viscosity and changes in variables related to hemoconcentration, the ability of alcohol to increase blood viscosity is considered to be due mainly to hemoconcentration. Alcohol itself did not increase whole blood viscosity in vitro at concentrations of 0.1, 0.2, 0.3 and 0.4% (w/v).

Adult↗
PubMed1983

Normalized natural killer (NK) cell activity in long-term remission of acute leukaemia.

NK cell activity was studied in 28 cases of acute leukaemia in remission. It was found that patients in long-term remission for 5 years or more had normal NK cell activity but those in remission for less than 5 years had significantly lowered activity. This suggests that patients with acute leukaemia had not been constitutionally deficient in NK cell activity. Low activity was augmented but not fully restored by interferon pretreatment in vitro. Therefore, the low NK cell activity observed during remission is not solely attributable to inadequate secretion of interferon in the host. It is suggested that the production of NK cells in bone marrow is impaired, or the function of NK cells is suppressed, by the leukaemia itself or by chemotherapeutic agents. Increased consumption of NK cells is also a possibility.

Acute Disease↗