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Biomedical subjects

Y Kuroda

Publications and source records attributed to Y Kuroda.

At least 1,009 records · Page 56Linked to original sources
PubMed1980

Studies on new phosphonic acid antibiotics. I. FR-900098, isolation and characterization.

A strain of Streptomyces, isolated from a soil sample and identified as Streptomyces rubellomurinus sp. nov., has been found to produce FR-900098, an interesting new antibiotic containing phosphorus in its molecule. The antibiotic, obtained as colorless crystals, was shown to inhibit a wide variety of Gram-negative bacteria including Pseudomonas, Proteus, and Escherichia coli. Its antibacterial action involves interference with bacterial cell wall synthesis as evidenced by the fact that it causes spheroplast formation by susceptible cells.

Anti-Bacterial Agents↗
PubMed1980

Studies on new phosphonic acid antibiotics. III. Isolation and characterization of FR-31564, FR-32863 and FR-33289.

Three phosphonic acid antibiotics were found to be produced in the fermentation broths of Streptomyces. FR-31564 and FR-32863 were produced by Streptomyces lavendulae. FR-33289 was produced by a strain of Streptomyces, identified as Streptomyces rubellomurinus subsp. indigoferus. They are distinct from, but resemble FR-900098 which was reported in our preceding paper, in their chemical and biological characteristics.

Anti-Bacterial Agents↗
PubMed1980

FR-900148, a new antibiotic. I. Taxonomy, fermentation, isolation and characterization.

A strain of Streptomyces, isolated from a soil sample and identified as Streptomyces xanthocidicus, has been found to produce FR-900148, a new antibiotic containing chlorine in its molecule. The antibiotic inhibits both Gram-positive and negative bacteria. However, it is not effective against wild type of Pseudomonas aerguinosa. Its antibacterial action is considered to result from cell wall synthesis inhibition since it causes spheroplast formation from susceptible cells.

Anti-Bacterial Agents↗
PubMed1980

FR-900137, a new antibiotic. I. Taxonomy and fermentation of the organism, and isolation and characterization of the antibiotic.

A strain of Streptomyces, isolated from a soild sample and identified as Streptomyces unzenensis sp. nov. has been found to produce FR-900137, an interesting new antibiotic, containing phosphorus in its molecule. The antibiotic, obtained as white powder, was shown to inhibit a wide variety of Gram-positive and Gram-negative bacteria except Pseudomonas aeruginosa.

Animals↗
PubMed1980

[Clinical results of cefoperazone in pediatric infections (author's transl)].

In order to evaluate effectiveness of cefoperazone (CPZ) in the treatment of bacterial infections of children, the clinical studies were carried out. CPZ was administered by one-shot injection to 28 patients at daily dose of 50 approximately 160 (average 89.7) mg/kg in 3 approximately 4 divided dose for 2 approximately 10 (average 5.6) days. The overall efficacy rate in 28 cases was 92.9%, i.e., excellent in 16 (57.1%), good in 10 (35.7%), fair in 1 (3.6%) and poor in 1 case (3.6%). Temporary rise of GOT and GPT or only GOT was observed in each 1 case out of 28 cases (7.1%), but any other abnormality was not observed throughout this series. Based on the above results, CPZ was thus considered to be a useful antibiotic in treatment of pediatric infections caused by Gram-positive cocci and Gram-negative rods.

Age Factors↗
PubMed1980

Immunologic studies on Werner's syndrome.

Five patients with Werner's syndrome were studied to elucidate the relationship between the immune system and the ageing process. Three of five patients had neoplasms such as fibrosarcoma, meningioma and thyroid adenoma but none of the five patients manifested symptoms and signs suggestive of typical autoimmune disorders. Most immunohaematological data were normal; however, two patients exhibited diminished lymphocyte functions such as a significant (P less than 0 . 05) reduction in pokeweed mitogen (PWM) induced B cell differentiation, a slightly decreased response to Con A- or mitomycin-treated allogeneic lymphocytes and naturally occurring serum antibody to T cells. While these immunological changes were quantitatively small, subnormal levels of immune functions were detected. Cultured fibroblasts exhibited a decrease in clonal growth potentials and elongation of newly synthesized DNA, a decreased expression of HLA antigens, and a diminished secretion of beta 2-microglobulin.

Adult↗
PubMed1979

A new sensitive method for assay of histidase in human skin and detection of heterozygotes for histidinemia.

A new sensitive method was developed for assay of histidase in the stratum corneum of human skin with [14C] histidine as substrate. With this method histidase could be detected using less than 1 mg of stratum corneum. Skin histidase was markedly reduced in seven infants with histidinemia. The enzyme activities in thirteen parents of the patients were about 50% of the normal values, and even the highest values in the parents did not overlap the lowest normal values. Thus heterozygotes in the autosomal recessive form of histidinemia can be distinguished from normal persons by their skin histidase activity measured by this sensitive assay method.

Adult↗