Yukio Tawada

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The binding of the chymotryptic troponin T subfragments to tropomyosin, troponin I, and troponin C was semiquantitatively examined by using affinity chromatography, and also by co-sedimentation with F-actin and polyacrylamide gel electrophoresis in 14 mM Tris/90 mM glycine. Circular dichroism spectra of the subfragments were measured to confirm that the(More)
We investigated the mechanisms of Ca2+ extrusion from cultured rat aortic smooth muscle cells while monitoring changes in the cytosolic Ca2+ concentration ([Ca2+]i) using fura 2 fluorescence. 45Ca2+ efflux from these cells consisted of two major mechanisms; one was dependent on the extracellular sodium concentration (Na+o) and the other was independent of(More)
AIMS To develop a rapid genotyping method for investigating outbreaks of methicillin-resistant strains of Staphylococcus aureus (MRSA) isolated in Japan. METHODS AND RESULTS Isolates were genotyped by detecting the keeping pattern of 16 open-reading frames (ORFs), a process we call phage ORF typing (POT). Thirteen of the ORFs were selected from phage(More)
We evaluated the clinical utility of an rRNA amplification-based Gen-Probe Amplified Mycobacterium Tuberculosis Direct Test (AMTD) system and a PCR-based Roche AMPLICOR MYCOBACTERIUM system for direct detection of Mycobacterium tuberculosis, M. avium, and M. intracellulare. Of the 422 sputum samples from 170 patients, 137 (121 of M. tuberculosis, 14 of M.(More)
Tropomyosin digested with carboxypeptidase A [EC] (CTM) shows a lower viscosity than the undigested protein in solution. From the relation between the viscosity decrease and the amount of amino acids liberated from the carboxyl terminus during this digestion, it is inferred that loss of the tri-peptide-Thr-Ser-Ile from the C-terminus is responsible(More)
We tested the antimicrobial activities of meropenem (MEPM), imipenem (IPM), panipenem (PAPM), piperacillin (PIPC), cefepime (CFPM), aztreonam (AZT), amikacin (AMK), and levofloxacin (LVFX) against 106 clinical Pseudomonas aeruginosa isolates and 64 clinical Acinetobacter spp. isolates with reduced susceptibility to carbapenems. Using NCCLS breakpoints, the(More)
The effect of cAMP on ATP-induced intracellular Ca+ mobilization in cultured rat aortic smooth muscle cells was investigated. Treatment of cells for 3 min at 37 degrees C with dibutyryl cAMP, a membrane-permeable analogue of cAMP, at concentration up to 500 microM resulted in 1.5- to 1.7-fold increase in the peak cytosolic Ca2+ concentration when cells were(More)
We examined the effect of phorbol myristate acetate (PMA), a potent activator of protein kinase C, on Ca2+ extrusion from cultured vascular smooth muscle cells (VSMCs) incubated in the absence of added extracellular Na+ (Na+o). Previously, strong experimental evidence was presented that the Na+o-independent Ca2+ extrusion from VSMCs is effected by the(More)
In the present study, we performed genotypic drug-resistance testing in 116 therapy-naive human immunodeficiency virus type 1 (HIV-1)-infected patients between 1999 and 2002 at Nagoya National Hospital, Japan. The prevalence of drug-resistant HIV-1 with one or more major mutations significantly increased from 5.3% (4/75) in 1999-2001 to 17.1% (7/41) in 2002(More)