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Biomedical subjects

T Miyake

Publications and source records attributed to T Miyake.

At least 415 records · Page 23Linked to original sources
PubMed1983

[Clinical observation on the transport of cefotiam into the bile and gall bladder tissue].

A clinical study was performed on concentration of cefotiam (CTM) in the gallbladder bile and the gallbladder tissue in benign diseases of the biliary tract. By an hour intravenous infusion the CTM concentration obtained 2 hours after the start of the infusion revealed that the level of the CTM in A bile was atmost same as that in B bile (3.1--46.0 micrograms/ml). The concentration in gallbladder tissue was 5.7--116 micrograms/ml. In addition, the CTM level was higher enough than the MIC of CTM covering more than 80% of the strains of E. coli and Klebsiella obtained from the focus. From these results, it is concluded that CTM is clinically effective and useful in the case of biliary disease.

Aged↗
PubMed1983

Characterization of human megakaryocyte colony-stimulating factor in the urinary extracts from patients with aplastic anemia and idiopathic thrombocytopenic purpura.

Using procedures that were effective in the purification of human urinary erythropoietin (Epo), we attempted initial purification of megakaryocyte colony-stimulating factors (CSF) in urinary extracts from patients with aplastic anemia (AA) and idiopathic thrombocytopenic purpura (ITP). Comparison of colony stimulation by purified human Epo and crude urinary extracts revealed: (1) that the pure Epo augments megakaryocyte colony formation in culture and (2) MEG-CSF activity is also present in materials other than Epo in the crude urinary extracts from the two types of patients. Similar to purification of Epo, ethanol precipitation and sulfopropyl-Sephadex chromatography provided twofold and threefold increases in the specific activity of MEG-CSF, respectively. In contrast to Epo, however, significant inactivation of MEG-CSF activity was seen with phenol treatment. The elution profile of MEG-CSF seen on hydroxylapatite chromatography of urinary extracts was different from that of Epo. These data provided a basis for initial steps for purification of MEG-CSF and support the notion that MEG-CSF is distinct from Epo.

Aminosalicylic Acids↗
PubMed1983

Simple, rapid spectrophotometry of urinary N-acetyl-beta-D-glucosaminidase, with use of a new chromogenic substrate.

We have developed a new spectrophotometric assay for urinary N-acetyl-beta-D-glucosaminidase (NAGase) with use of sodio m-cresolsulfonphthaleinyl N-acetyl-beta-D-glucosaminide (MCP-NAG). MCP-NAG was synthesized from acetochloro-glucosamine and m-cresolsulfonphthalein (MCP) in four steps. MCP-NAG reacts well with NAGase (Km = 0.41 mmol/L) and is highly water soluble. The absorption maximum and molar absorptivity of the aglycone MCP are 580 nm and 40 670, respectively. Spectral overlap of interfering substances at 580 nm is almost negligible, so that the urine blank can be omitted from the assay procedure. The high molar absorptivity of MCP gives sufficient analytical sensitivity at a reaction time of 15 min. The correlation between the MCP-NAG method (y) and the fluorimetric method (x) involving 4-methylumbelliferyl N-acetyl-beta-D-glucosaminide is represented by the equation y = 0.995x - 0.669 (r = 0.991). Thus, the present method provides practical advantages over conventional methods, for use in the routine laboratory.

Acetylglucosaminidase↗
PubMed1982

Production in Escherichia coli of biologically active secretin, a gastrointestinal hormone.

A synthetic gene for porcine secretin was ligated with Pst I-cleaved pBR322 by its flanking synthetic Pst I linkers to produce a fused protein consisting of an amino-terminal portion of beta-lactamase and an entire secretin molecule. The hybrid plasmid was transferred into competent Escherichia coli cells. The plasmids, which were proved in our investigation to contain the secretin gene in the desired orientation, were then screened for the production of secretin. This was shown by radioimmunoassay and gel electrophoretic analysis of the polypeptides that were synthesized in E. coli minicells transformed with the hybrid plasmids. Secretin so produced, whose carboxy terminal residue may not be amidated in contrast with natural porcine secretin, showed the same activity in stimulating pancreatic secretion in a bioassay with anesthetized rats as does natural secretin.

DNA Restriction Enzymes↗
PubMed1982

Apparent heterogeneity of human megakaryocyte colony- and thrombopoiesis-stimulating factors: studies on urinary extracts from patients with aplastic anaemia and idiopathic thrombocytopenic purpura.

Megakaryocyte colon-stimulating factor (MEG-CSF) in the urinary extracts from patients wit aplastic anaemia (AA) revealed two distinct peaks of activity on Sephadex G-200 gel filtration with apparent molecular weights of 155,000 and 76,000. Both fractions induced significant thrombocytosis in peripheral blood and megakaryocytosis in the spleen of rats. Heterogeneity of MEG-CSF was also found in the extracts from the urine of patients with idiopathic thrombocytopenic purpura. The higher molecular weight MEG-CSF was significantly reduced when the gel filtration was performed under the dissociating conditions. Ion-exchange chromatography indicated that the higher molecular weight MEG-CSF had a different charge from the lower molecular weight MEG-CSF. These results suggest that the apparent heterogeneity of MEG-CSF is due to interaction of MEG-CSF with other proteins in the urinary extracts.

Anemia, Aplastic↗
PubMed1982

Xanthic variant of non-ossifying fibroma (so-called xanthofibroma) of the mandible. An ultrastructural study.

An unusual case of a 37-year-old female with xanthomatous bone tumor of the right molar area of the mandible was presented. The tumor was asymptomatic and found to be a well-demarcated intraosseous radiolucent lesion on radiographic examination. Histologically the tumor consisted of two cell types, fibroblastic and xanthomatous cells. There was no osteoid, bone or cartilage formation. However, numerous psammomatous calcified bodies were seen in the fibrous area. Ultrastructural study showed fibroblastic cells in different stages of proliferation as the basis of the tumor which transform itself into xanthomatous cells. From the clinicopathologic findings, our case was thought to be a xanthic variant of non-ossifying fibroma (so-called xanthofibroma) of the mandible.

Adult↗