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Biomedical subjects

M Kubo

Publications and source records attributed to M Kubo.

At least 595 records · Page 33Linked to original sources
PubMed1984

The effect of racemomycin-D, a nephrotoxic antibiotic, on cellular metabolism of rat kidney cortex in vitro.

In vitro effects of racemomycin-D on cellular metabolism were examined in rat kidney. Racemomycin-D decreased the concentration gradient of Na+ and K+ across the cell membranes, but failed to influence water content and ATP concentration of kidney cortical slices. The antibiotic inhibited microsomal (Na+ + K+)-ATPase. Preincubation of the microsomes with racemomycin-D enhanced the inhibition about 1.8-fold. Succinoxidase activity of mitochondria remained unaltered in the presence of racemomycin-D, but the antibiotic potently decreased ATP-dependent Ca2+ and Mg2+ uptakes by mitochondria. These results suggest that racemomycin-D probably disorders intracellular homeostasis of Na+, K+ and Ca2+.

Adenosine Triphosphate↗
PubMed1984

Sensitive non-radioisotopic method for measuring lipoprotein lipase and hepatic triglyceride lipase in post-heparin plasma.

In this method for measuring lipoprotein lipase (LPL) and hepatic triglyceride lipase (H-TGL) in post-heparin plasma, we determine the released free fatty acids enzymically. After release, they are extracted by Dole 's method (J. Biol. Chem. 235: 2595-2599, 1960), solubilized with Triton X-100, then measured with an enzymic kit (NEFA Kit-K; Nippon Shoji Kaisha Ltd.) after residual turbidity is removed by centrifugation with chloroform. A 5-microL sample of post-heparin plasma suffices to measure the activity of LPL and H-TGL; thus the method is as sensitive as the radioisotopic method. Selective assay of LPL and H-TGL, by adding sodium dodecyl sulfate to inactivate H-TGL or NaCl to inactivate LPL, is also feasible. The mean activities +/- SD of LPL and H-TGL in plasma of normal healthy men were respectively 9.4 +/- 2.3 mumol/h per milliliter (157 +/- 38 U/L) and 20.1 +/- 10.4 (335 +/- 173 U) mumol/h per milliliter (U/L).

Adult↗
PubMed1983

Serogrouping of Rhodococcus equi.

The serological relationships among 27 isolates of Rhodococcus equi selected from a total of 1,195 isolates were investigated by cross-agglutination and absorption tests. The presence of capsular material was demonstrated in all the 27 isolates by electron microscopic observation. Antisera were prepared by employing formalized antigen of each isolate. In the cross-agglutination test with formalized antigen, 13 antisera reacted with homologous antigens alone, but the remaining 14 antisera reacted not only with homologous antigens but also with one to four heterologous antigens. When these 14 antisera possessing heterologous agglutinins were absorbed with each of the cross-reacting antigens, 14 specific antisera were obtained. The cross-agglutination test with these 27 antisera proved the 27 strains examined to be serologically distinct from one another. These strains were designated serogroups 1 to 27. Thus the same number of grouping antisera were prepared. The distribution of each serogroup among the 1,195 isolates and 15 reference strains was investigated by the slide agglutination test. All the strains were found to be groupable. Most of them belonged to serogroups 1 to 4, 7 to 9, 11, 14, and 15. Of the serogroups designated, 4, 16, 2, 12, 21, 1, and 9 were identical with Prescott's serovars 1, 2, 3, 4, 5, 6, and 7, respectively.

Agglutination Tests↗
PubMed1983

Biosynthetic Met-hGH: lack of immunoreactivity for other pituitary hormones.

The immunoreactivities of 5 hGH preparations were examined in RIA systems for hPRL, hACTH, hLH, hFSH and hTSH. All preparations derived from pituitary extracts showed distinct displacements in almost all RIA systems when added 10(3) to 10(4) times larger amounts than the proper hormones. On the other hand, biosynthetic methionyl-hGH did not manifest any immunoreactivity in any system with comparable amounts. These results indicate that the displacements caused by hGH preparations in RIA systems for other pituitary hormones are solely due to contamination, and not due to intrinsic cross reaction. In in vitro and in vivo studies using extractive preparations of hGH one should be cautious about contamination of other pituitary hormones.

Growth Hormone↗
PubMed1983

Ultrastructural observation on the bacterial capsule of Bacillus anthracis seen in the spleen of a diseased cow.

The bacterial capsule of Bacillus anthracis seen in the spleen of a cow which had died of anthrax was studied electron microscopically. It was visible around bacteria which had been fixed in a ruthenium red-containing fixative. It was composed of electron-dense spikes and extended outwards from the bacterial surface. It was not found around bacteria which had been treated with a fixative devoid of ruthenium red. Bacteria were seen scattered among blood cells. They were not phagocytized by neutrophils or macrophages.

Animals↗