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Biomedical subjects

S Miyoshi

Publications and source records attributed to S Miyoshi.

At least 289 records · Page 16Linked to original sources
PubMed1987

Purification and characterization of Vibrio vulnificus protease.

A protease was purified from a strain of Vibrio vulnificus isolated from the blood of a septicemic human. The vibrio was cultured in bacto peptone-yeast extract medium, and the protease was purified by a purification procedure including ultrafiltration of the culture supernatant with an Amicon YM 5 membrane, diethylaminoethyl-Sephacel column chromatography, Sephacryl S-200 column chromatography and fast protein liquid chromatography on Mono Q column. The protease preparation revealed homogeneity on polyacrylamide gel electrophoresis and about 30,000-fold purification was achieved, with a yield of about 30%. The isoelectric point of the purified V. vulnificus protease was about 5.80 and its molecular weight was ca. 45,000 by sodium dodecyl sulfate polyacrylamide gel electrophoresis. The optimum pH of the protease activity was 8.0. The V. vulnificus protease was inhibited by a metalloprotease inhibitor and zinc ion and/or ferrous ion were essential for its enzyme activity. No cysteine residue was detected in the V. vulnificus protease. The protease had caseinolytic, elastolytic and collagenolytic activities.

Amino Acids↗
PubMed1987

Activation of the plasma kallikrein-kinin system by Vibrio vulnificus protease.

Vibrio vulnificus protease enhanced hypodermic vascular permeability when injected into the dorsal skin of a guinea pig. Enhancement of permeability was observed within 2 min, and the permeability-enhancing reaction terminated at about 10 min postinjection. The permeability-enhancing reaction was greatly augmented by simultaneous injection of a kininase II inhibitor, whereas the reaction was inhibited by soybean trypsin inhibitor, a well-known inhibitor of plasma kallikrein. Furthermore, in vitro activation of plasma prekallikrein to kallikrein by V. vulnificus protease was observed. These results indicate that V. vulnificus protease enhances vascular permeability through activation of the plasma kallikrein-kinin system which generates bradykinin, factor in edema formation.

Animals↗
PubMed1987

[A case of hepatocellular carcinoma with bone metastasis which responded to oral administration of UFT].

A 61-year-old male was referred to our hospital for evaluation of right upper arm pain. He was diagnosed as having primary hepatocellular carcinoma with bone metastasis by his high titer (111,683 ng/ml) of serum alpha-fetoprotein, computed tomography and abdominal angiography, and so UFT therapy, 400 mg daily, was instituted. After 2 months of this therapy, the titer of serum alpha-fetoprotein gradually decreased. Seven months later, the titer was 3,997 ng/ml and reduction of the hepatic tumor size was shown by computed tomography and ultrasonography. Furthermore, the right upper arm pain diminished and X-ray examination revealed remarkable improvement. During chemotherapy, there was no severe side effect apart from mild anemia and the patient is presently still alive. This case suggests the efficacy of UFT for the treatment of primary hepatocellular carcinoma.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1987

[Metastatic renal tumors: clinical report of three cases and review of 136 cases including 38 cases from the Japanese literature].

Three cases of metastatic renal tumor are reported. The first case was of a 61-year-old man, who had a Miles' operation for rectal adenocarcinoma 30 months before, and suffered from high fever and right flank pain. Right nephrectomy was carried out and the kidney was found to contain an adenocarcinoma identical to the one previously removed from the rectum. He died 1 year after nephrectomy. The second case was of a 35-year-old man, who had undergone left pneumonectomy for a squamous cell carcinoma of the bronchus. One month later, he was readmitted with cloudiness of consciousness and high fever. Investigations revealed right kidney, adrenal gland and brain malignancies, and which were ectomized totally. On pathological examination all ectomized tissues were metastatic squamous cell carcinoma. He died 1 month after the second operation. The third case was of a 48-year-old man, who had undergone left pneumonectomy for a squamous cell carcinoma of the bronchus. One year after pneumonectomy, abdominal CT showed a left renal tumor. Right nephrectomy was performed and pathological examination revealed a metastatic squamous cell carcinoma. He is now alive 4 months after nephrectomy without any sign of recurrence. A total of 136 cases of metastatic renal tumors including 38 cases from the Japanese literature, are reviewed.

Adenocarcinoma↗
PubMed1987

An evaluation of operative outcome in patients with funnel chest diagnosed by means of the computed tomogram.

A questionnaire survey of 66 patients with funnel chest who underwent corrective surgical procedures by the sternal elevation method, with or without the application of metal strut, demonstrated that the operative result was good in 60.6% and fair in 39.4%. None of the patients rated the result as unsatisfactory. A computed tomogram of the chest wall was performed to study the depression (b/c), asymmetry (b'/b), and flatness (a/b) of the chest wall, where a was the maximum transverse distance of the chest wall, b and b' were the maximum distance from the anterior to the posterior chest wall at the left and right sides (b greater than b'), and c was the perpendicular distance from the point of the anterior chest wall at its greatest deformity to the level of the anterior tip of the spine. In patients with a good result, b/c and b'/b were well corrected, while in patients with a fair postoperative result, they were still significantly different from those in subjects with normal chest walls. Moreover, 85.7% of the patients (6/7) with b/c over 3.0 before operation had a fair postoperative result. The degree of a/b was not corrected in patients with either good or fair postoperative results. We conclude that an operative approach to lengthen ribs would be necessary to improve the degree of a/b, that in patients with severely depressed funnel chest, expressed as a b/c value over 3.0 by computed tomography, a transient support with struts should be applied, and finally, that a more careful approach for correction of asymmetry should be undertaken to improve the operative results.

Adolescent↗
PubMed1986

Localization of carbamoylphosphate synthetase and aspartate carbamoyltransferase in chloroplasts.

The localization of carbamoylphosphate synthetase (CPSase) and aspartate carbamoyltransferase (ACTase), the first two enzymes of the pyrimidine biosynthetic pathway, in chloroplasts was investigated. In dark-grown radish (Raphanus sativus) seedlings, light induced a prominent increase in CPSase activity, but had little effect on ACTase activity. Both enzymes were found in chloroplasts isolated from radish cotyledons and leaves of spinach (Spinacia oleracea), soybean (Glycine max), and corn (Zea mays). The higher activity of ACTase relative to CPSase is discussed in relation to the instability of carbamoylphosphate, the product of the CPSase, and to the control of pyrimidine synthesis. Based on these results, the function of CPSase and ACTase in chloroplasts is discussed.

Journal Article↗
PubMed1986

Idiopathic portal hypertension associated with Hashimoto's disease: report of three cases.

Three cases of idiopathic portal hypertension associated with Hashimoto's disease are described. All of the cases were middle-aged Japanese women showing splenomegaly, esophageal varices and pancytopenia in the absence of extrahepatic portal obstruction, and cirrhosis of the liver. Two patients were euthyroid with goiter, one of which revealed diffuse lymphocytic infiltration, obliteration of thyroid follicles, and fibrosis on histological examination of the thyroid; the third suffered from myxedema without goiter. Antithyroid microsomal antibody was positive in all patients and antithyroglobulin antibody was positive in none. These findings might imply an immunological role in the pathogenesis of idiopathic portal hypertension.

Female↗
PubMed1986

Anatomical and functional differences in the Adductor mandibulae muscle between Zaco platypus and Carassius gibelio langsdorfi of the Cyprinidae family.

A histological study has been made on the jaw-closing muscle, Adductor mandibulae, of 2 species of Cyprinidae, Zaco platypus and Carassius gibelio langsdorfi, which show completely different feeding behaviour. The former swims up to the food with its mouth open in rapid current, and the latter sucks food from the bottom into its mouth by enlargement of the buccal and opercular cavities in quite mild current. The latter's feeding behaviour was made repeatedly. The A. mandibulae was divided into its anterior and posterior parts in both fish. The anterior part in Z. platypus was divided into 2 portions, and that of C. gibelio langsdorfi into 3 portions. In each portion of the muscle of both fish, SDH activity in the muscle fibers decreased from the medial to the lateral side. Both fish had 3 types of the fibers on the basis of SDH activity, whereas the combinations of each fiber type were more complex in C. gibelio langsdorfi than in Z. platypus. Moreover, the ratio of fibers with higher SDH activities was larger in C. gibelio langsdorfi than in Z. platypus. And, differences in the number of capillaries per fiber in the same fiber type between the 2 fish suggest a complex adaptation of the jaw-closing muscle to the environmental circumstances of the fish.

Animals↗
PubMed1986

[A case of synchronous contralateral renal cell carcinoma and ureteral transitional cell carcinoma].

A case of synchronous contralateral renal cell carcinoma and ureteral transitional cell carcinoma is reported. A 56-year-old man, who had been incidentally found to have an abnormal mass in the upper pole of the right kidney on ultrasound sonography, was admitted on January 8, 1985. CT scanning and renal arteriography revealed right renal malignancy. Right radical nephrectomy was performed and histological examination showed adenocarcinoma, granular cell type of the right kidney. He was discharged on February 3, 1985. Two months postoperatively, he was rehospitalized for macroscopic hematuria. Left retrograde pyelogram showed obstruction at middle ureter and cytology of urine from left ureter was positive. So a left ureteral tumor was suspected, and partial resection of left ureter and ureteroureterostomy were performed. Histological examination revealed ureteral transitional cell carcinoma. He is now doing well at 6 months following the lat surgery, without any evidence of recurrence.

Carcinoma, Renal Cell↗