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M Minagawa

Publications and source records attributed to M Minagawa.

At least 91 records · Page 5Linked to original sources
PubMed1989

[Clinico-pathological studies on the effects of calcium hydroxide eugenol preparations to the human vital pulp tissues].

The present paper reports results of a study to evaluate clinico-pathologically the effects of calcium hydroxide eugenol preparations on exposed pulp tissues in permanent human teeth. The experiments were performed on 80 vital human teeth from patients ranging in age from 12 to 54 years. The experimental teeth were arbitrarily divided into the following 4 groups. Group CRCS: 20 cases treated with CRCS (Hygienic, Akron, Ohio, USA). Group KEZ: 20 cases treated with Dentalis KEZ (Neo Dental Chemical Products, Tokyo, Japan). Group CE: 20 cases treated with calcium hydroxide eugenol (positive control) Group E: 20 cases treated with pure eugenol (negative control). After local anesthesia, the experimental teeth were isolated with rubber dums or cotton rolls. Following preparation of Black's simple class 1 cavities with a diamond instrument mounted high-speed air turbine, the pulp was intentionally exposed by means of a steel bur mounted electric engine. The cavity and exposed pulp surface were cleaned with saline and dried on absorbent material. Then the experimental materials (agents) were applied to exposed pulp surface. The cavity was lined with gutta-percha temporally stopping, and the remainder was filled with silver amalgam. The teeth were clinically observed at various intervals from immediately to 530 days after treatment and then extracted under local anesthesia and prepared for histopathological study. Decalcified sections were stained with hematoxylin and eosin. 1) CLINICAL OBSERVATIONS: During the observation period, symptoms occurred in the following: Group CRCS: 4 (20%) out of 20 cases. Group KEZ: 4 (20%) out of 20 cases. Group CE: 6 (30%) out of 20 cases. Group E: None of 20 cases No spontaneous pain was observed in these groups. 2) Clinical evaluations Group: CRCS: 16 cases (80%) were good, 3 cases (15%) were satisfactory, and 1 cases (5%) were failure. Group KEZ: 16 cases (80%) were good, 1 cases (5%) were satisfactory, and 3 cases (15%) were failure. Group CE: 14 cases (70%) were good, 4 cases (20%) were satisfactory, and 2 cases (10%) were failure. Group E: 20 cases (100%) were good. 3) Histopathological observations. Various kinds and degree of pulp changes were occurred in each group. Hyperemia and round-cell infiltration resulting from damage caused by treatment and medicaments were frequent in each group. No suppurative inflammation occurred in group CE. Pulp cicatrization and apposition of dentin on pulp chamber walls were observed frequently in each groups. Hard tissue formation was observed in numerous cases of group CE and in some cases in group CRCS and KEZ.(ABSTRACT TRUNCATED AT 400 WORDS)

Adolescent↗
PubMed1987

[Primary malignant fibrous histiocytoma of the breast, report of a case].

Although malignant fibrous histiocytoma (MFH) is the most common soft tissue sarcoma of adult, it rarely arises in the breast tissue. Only seven cases have been previously reported in Japan. One case of the MFH of the mammary gland is presented in this paper. A 39 year old woman, who had received no radiation, was referred to our hospital due to a painful right breast lump. Excisional biopsy revealed yellowish white soft tumor with an obscured margin. Histological, tumor was composed of spindle shaped cells of a storiform pattern, which was diagnosed as MFH of the breast. Radical mastectomy (Br + Mj + Ax) was added to this patient. The tumor invaded to the fat tissue without metastasis to the axillary lymph nodes. We performed the post-operative adjuvant chemotherapy of Adriamycin. She made an uneventful recovery and is now free of disease eleven months postoperatively.

Adult↗
PubMed1985

Evaluation of isotope ratio (IR) mass spectrometry for the study of drug metabolism.

Isotope ratio (IR) mass spectrometry was evaluated for the study of drug metabolism and balance using 13C, 15N2-labelled antipyrine (AP) as a test drug. Rats were given 40 mg kg-1 (13C,15N2)AP intraperitoneally. Breath, urine, faeces and blood were collected. Except for breath, samples were combusted in sealed quartz tubes. The resulting CO2 and N2 were analysed for excess 13C and 15N, relative to pre-dose samples, by IR mass spectrometry. In addition, blood levels of AP and cumulative excretion of urinary AP metabolites were determined by gas chromatography/mass spectrometry/selected ion monitoring (GC/MS/SIM) and high-performance liquid chromatography (HPLC) respectively. Excess 13C and 15N levels in blood were comparable with observed levels of AP, and urinary recoveries of 13C (42%) were in good agreement with those calculated from HPLC data (45%). N-Demethylation, one of the important pathways of AP metabolism, was most rapidly determined by excess 13CO2 excretion in breath (8%). The IR mass spectral analysis complemented gas chromatographic/mass spectrum and HPLC analyses, and was less complex.

Animals↗
PubMed1983

[Fundamental and clinical studies on T-1982 (cefbuperazone) in the field of obstetrics and gynecology].

T-1982 (cefbuperazone), a new cephamycin antibiotic, was fundamentally and clinically studied in the field of obstetrics and gynecology. The following results were obtained. The concentrations of T-1982 in arterial and venous blood and genitalia following intravenous injection were measured. The results demonstrated favourable transfer of the drug into various internal genital organs. T-1982 was administered to 12 patients. The efficacy rate was 75.0%, that is to say, good in 9 cases. No side effects were noted in any cases. It is, therefore, presumed that T-1982 is a useful drug for the infectious diseases in the field of obstetrics and gynecology although the number of subjects was not so large in this study.

Adult↗
PubMed1978

[Immunological surveillance mechanism of a rat brain tumor model--study of time-lapse changes in the concomitant immunity of peripheral blood lymphocytes by microcytotoxicity assays (author's transl)].

A rat brain tumor model was prepared by semi-stereotactically implanting 1 x 10(6) RG--C6 tumor cells (chemically induced and maintained in vitro) in the right caudate nucleus of inbred WKA rat by a new method "Soft Agar Technique" which we developed. The tumor grew at a nearly fixed rate. We measured the maximum tumor area and the whole brain area of the rat brain which were sectioned coronary in series. We regarded the percentage of the tumor area to the whole area of the same section as tumor growth index. Microcytotoxicity assays of peripheral blood lymphocytes were performed at various stages of the tumor growth. RG--C6 cells were used as target cells, and they mixed with lymphocytes by Takasugi and Klein's method. Cytotoxicity index was higher in 22 cases (80.00 +/- 16.67; tumor growth index, 0--10) than in 28 cases of the control group (67. 25 +/- 19.68) and then gradually decreased with tumor growth (Fig. 2). At last cytotoxicity index went down to 41.55 +/- 24.94 in 11 cases (tumor growth index, over 31). These observations have a strong resemblance to other animal tumor models and suggest that the rat having brain tumor intra-axially have concomitant immunity especially in the first stage of tumor bearing.

Animals↗