76
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Allen N, Edge M, He J, Chen W, Kikkawa K, Minagawa M. Thermal and photooxidative behaviour of 2-hydroxybenzophenone stabilisers in polyolefin films: Effect of 4-butoxy-4-amino-tetramethylpiperidine substitution. Polym Degrad Stab 1993. [DOI: 10.1016/0141-3910(93)90225-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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77
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Kato S, Hirano A, Umahara T, Herz F, Shioda K, Minagawa M. Immunohistochemical studies on the new type of astrocytic inclusions identified in a patient with brain malformation. Acta Neuropathol 1992; 84:449-52. [PMID: 1332366 DOI: 10.1007/bf00227674] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Immunohistochemical studies were carried out on the new type of cerebral cortical astrocytic inclusions recently discovered in a 20-year-old patient with maldeveloped brain and micropolygyria. The inclusions appeared as eosinophilic structures (hematoxylin and eosin stain) and did not exhibit argyrophilia (modified Bielschowsky method). The inclusions were strongly stained by the antibody against S-100 protein (S 100) and to a lesser extent by the antibody to microtubule-associated protein 1B (MAP 1B). In contrast to Rosenthal fibers, the astrocytic inclusions did not react with antibodies to alpha B-crystallin, glial fibrillary acidic protein and ubiquitin. No positive reactions were obtained with antibodies against heat-shock protein 27 (HSP 27), HSP 72, actin, vimentin, desmin, cytokeratin, myelin basic protein, beta-tubulin, MAP 2, tau protein, paired helical filament, phosphorylated neurofilament protein (NFP), nonphosphorylated NFP, synaptophysin, cathepsin D, alpha 1-antichymotrypsin, alpha 1-antitrypsin and basic fibroblast growth factor. By immunoelectron microscopy, the products of the reaction with the anti-S 100 antibody appeared as heterogeneous granular deposits and with the antibody to MAP 1B they were randomly scattered throughout the astrocytic inclusions. Our results demonstrate that the immunohistochemical profile of the recently described inclusions differs from that of Rosenthal fibers. Whether the novel inclusions are involved in congenital astrocyte dysfunction and cerebral malformation remains to be established.
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78
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Minagawa M, Shioda K, Shimizu Y, Isshiki T. Inclusion bodies in cerebral cortical astrocytes: a new change of astrocytes. Acta Neuropathol 1992; 84:113-6. [PMID: 1380200 DOI: 10.1007/bf00427225] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A unique pathological finding of astrocytes was observed in the brain of a 20-year-old man who had severe physical and mental retardation. The brain was malformed showing micropolygyria in several cortical areas. A large number of hypertrophic astrocytes with eosinophilic granular substances in their cytoplasm were found throughout the cerebral cortex. Several staining procedures and electron microscopical examinations were carried out on these intracytoplasmic inclusion. It was found that the appearance and staining character of these inclusions were different from other astrocytic changes, especially the Rosenthal fiber, described so far. The authors consider that these inclusion bodies in cerebral cortical astrocytes represent new pathological changes of astrocytes that appear to be associated with malformation of the brain.
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79
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Kumazawa T, Mizumura K, Minagawa M, Tsujii Y. Sensitizing effects of bradykinin on the heat responses of the visceral nociceptor. J Neurophysiol 1991; 66:1819-24. [PMID: 1667414 DOI: 10.1152/jn.1991.66.6.1819] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
1. Whether bradykinin (BK), which is known as an endogenous pain-producing substance, induces augmentation of the discharges of polymodal receptors evoked by heat stimulation was investigated in in vitro canine testis-superior spermatic nerve preparations. 2. The heat response was significantly augmented by pretreatments with BK at concentrations greater than 0.094 nM, whereas BK induced significant increases in the mean discharge rates at concentrations above 9.4 nM. Both effects increased in a concentration-dependent manner. The augmenting effect of BK on the heat response diminished within 10 min after application of BK, regardless of concentration. 3. When 9.4 nM BK was applied in a mixture with 940 nM NPC349, a B2 receptor antagonist, the averaged mean discharge rate evoked by BK and the averaged augmenting effect were both significantly suppressed compared with those induced by BK given alone. 4. The augmenting effect of BK on the heat response of polymodal receptors could be observed even in the absence of BK-evoked discharges per se in several cases in which low concentrations of BK or BK plus B2 antagonists were given. 5. These findings suggest that the augmenting effects of BK on the heat response depend on B2 receptor-mediated intracellular processes acting in parallel to, but not directly on, the impulse-generation mechanism of the heat response of the polymodal receptor.
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80
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Abstract
General aspects in isotope biogeochemistry was summarized with emphasis on delta 15N and delta 13C contents in plants and animals in natural ecosystems. In the estuary, the variation of isotope ratios were principally governed by the mixing of land-derived organic matter, marine phytoplankton, and seagrasses. A clear cut linear relationship between animal delta 15N and its trophic level was obtained in the Antarctic food chain system. Several current efforts to use the stable isotopes for food web analysis were demonstrated for some terrestrial and marine systems as well as human food web.
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81
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Sasaki T, Minagawa M, Yamamoto T, Ichihashi H. A case of the Rett syndrome with acute encephalopathy induced during calcium hopantenate treatment. Brain Dev 1991; 13:52-5. [PMID: 2063999 DOI: 10.1016/s0387-7604(12)80298-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report a girl with the Rett syndrome who had acute encephalopathy probably induced by calcium hopantenate (HOPA). This 4-year-6-month-old girl had a history of moderate developmental delay and had received HOPA administration when first admitted at 2 years 6 months of age with hypoglycemia, hyperammonemia, lactic and pyruvic acidemia, and non-ketotic dicarboxylic aciduria. After this episode, she showed the rapid destructive stage of the Rett syndrome, i.e., severe psychomotor retardation with loss of speech, peculiar stereotypic hand movements, autistic behavior and seizures. Despite subsequent investigations, including analysis of urinary metabolites of organic and amino acids, measurement of serum carnitine and a muscle biopsy, we could not clarify the primary metabolic abnormalities in this girl.
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82
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Allen N, Edge M, Conway S, Doyle D, Howells E, Kikkawa K, Minagawa M, Sekiguichi T. Synthesis and thermal and photo-oxidative behaviour of novel 4-substituted alicyclic amino-2-hydroxybenzophenone stabilizers in polypropylene films. Eur Polym J 1991. [DOI: 10.1016/0014-3057(91)90236-h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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83
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Allen N, Haque E, Howells E, Kikkawa K, Minagawa M. Synthesis and thermal and photo-oxidative behaviour of novel aminated 2-hydroxybenzophenone stabilizers in polyolefin films. Eur Polym J 1991. [DOI: 10.1016/0014-3057(91)90010-l] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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84
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Shibasaki M, Sanjo K, Bandai Y, Imamura H, Nomura Y, Hirata M, Chou S, Minagawa M, Hashimoto M, Ohashi K. [Effects of intra-arterial infusion of degradable starch microspheres on liver tissue blood flow]. Gan To Kagaku Ryoho 1990; 17:1706-10. [PMID: 2389959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The effects of intra-arterial infusion of degradable starch microspheres (DSM) on liver tissue blood flow were estimated in rat with liver carcinoma induced by 3'-methyl-4-dimethylaminoazobenzene (3'-Me-DAB) administration. Tissue blood flow of tumor and normal liver was measured simultaneously by Laser blood flowmeter. Tissue blood flow of tumor and normal liver was 13.3 +/- 6.9, 13.2 +/- 4.3 (ml/min/100 g), respectively. After intra-arterial infusion of DSM, tissue blood flow of both tumor and normal liver decreased to the same degree as that at hepatic artery occlusion and then gradually recovered. This gradual recovery of tissue blood flow was supposed to express the process of resolution of DSM by alpha-amylase. The recovery time of tissue blood flow following intra-arterial infusion of DSM was 27.3 +/- 4.0 min (DSM 20 mg/kg) and 70.0 +/- 23.6 min (DSM 30 mg/kg) in tumor and 20.0 +/- 3.3 min and 36.5 +/- 18.0 min, respectively, in normal liver. Thus, the blocking effect of blood flow by DSM was different between tumor and normal liver and proved to be more persistent in the former.
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85
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Mizumura K, Minagawa M, Tsujii Y, Sato J, Kumazawa T. Differences in augmenting effects of various sensitizing agents on responses to heat and bradykinin of the testicular polymodal receptor. Pain 1990. [DOI: 10.1016/0304-3959(90)92406-g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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86
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Nagy KA, Foley WJ, Kaplan IR, Meredith D, Minagawa M. Doubly Labeled Water Validation in the Marsupial Petauroides-Volans. AUST J ZOOL 1990. [DOI: 10.1071/zo9900469] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Amounts of carbon dioxide (CO2) produced by caged greater gliders were measured simultaneously by means of potassium hydroxide absorption, and by the low-level, doubly labelled water method, which incorporated a gas isotope ratio mass spectrometer for determining the low oxygen isotope enrichments. The two methods yielded significantly different values, but doubly labelled water underestimated CO2 production by only 8.3% on average, and this error is in the range of mean errors found in previous validation studies where no significant differences existed. In addition, we tested procedures designed to reduce the costs of using the doubly labelled water method, by streamlining field and laboratory procedures for sample handling and processing.
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87
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Kumazawa T, Mizumura K, Sato J, Minagawa M. Facilitatory effects of opioids on the discharges of visceral nociceptors. Brain Res 1989; 497:231-8. [PMID: 2573404 DOI: 10.1016/0006-8993(89)90267-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Effects of opioids on the activity of visceral nociceptors were tested using the in vitro testis-spermatic nerve preparations excised from deeply anesthetized dogs. Morphine, DADLE and dynorphin (10 microM) elicited discharges of polymodal receptors in approximately 1/3 of the tested cases. The incidence of the excitatory response of morphine increased at higher concentrations. The excitatory responses were quite variable among preparations and showed a strong tendency for tachyphylaxis. Similar increases in discharges were elicited when morphine was applied during the steady state of the response evoked by bradykinin (BK) or BK mixed with prostaglandin E2. Pretreatment of morphine for 5 min significantly augmented the subsequent BK responses for 30 min or more. Naloxone per se induced neither excitation nor augmentation of the subsequent BK response, however it reversed the augmenting effect of morphine on BK response. In contrast with previous reports proposing peripheral analgesic effects of opioids, suppressive effects on nociceptors were never observed in the present experiment. Peripheral effects of opioids were discussed.
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88
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Minagawa M, Yamaguchi K, Tobe O, Yuzawa K, Yoshida T, Furusawa M, Nakagawa K, Ito A. [Experimental studies on the sealing properties of various kinds of root canal sealers in vitro (Part 3)]. SHIKA GAKUHO. DENTAL SCIENCE REPORTS 1989; 89:669-79. [PMID: 2626693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In previous studies (Shikwa Gakuho 80: 473-485, 1471-1486, 1980), the authors have reported on sealing properties in vitro. But the recent development of many new sealers makes necessary a detailed reexamination at this time. The experimental materials were as follows; Zinc oxide eugenol sealer......Canals Calcium hydroxide eugenol sealer......CRCS, Dentalis KEZ Calcium hydroxide guaiacol sealer......FR Hydroxyapatite sealer......Finapec APC, Apatite root sealer TYPE III The experimental procedure employing a glass tube and the dye-penetration method was similar to the one used in previous studies. Results of the investigation; 1. Degrees of dye penetration were classified into 3 types i) Immediate penetration through the zone between the material and the glass tube within 2 days.--Apatite root sealer TYPE III, Dentalis KEZ ii) Little penetration within 12 hours but gradual penetration to the deep zone thereafter.--CRCS, Canals iii) Slight penetration within 7 days and then gradual penetration 1/5 of the way through the zone between the material and the glass tube.--Finapec APC 2. Dye penetrated through the material in the case of apatite root sealer TYPE III and FR.
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89
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Ushijima S, Minagawa M, Kiyohara K, Kim J, Kitagawa S, Nakagawa M, Segawa Y. [Primary malignant fibrous histiocytoma of the breast, report of a case]. NIHON GEKA GAKKAI ZASSHI 1987; 88:119-22. [PMID: 3029557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
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.
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90
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Fujii T, Tatara T, Minagawa M. Studies on applications of lipolytic enzyme in detergency I. Effect of lipase fromCandida cylindracea
on removal of olive oil from cotton fabric. J AM OIL CHEM SOC 1986. [DOI: 10.1007/bf02541967] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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91
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Schoeller D, Minagawa M, Slater R, Kaplan I. Stable isotopes of carbon, nitrogen and hydrogen in the contemporary north American human food web. Ecol Food Nutr 1986. [DOI: 10.1080/03670244.1986.9990922] [Citation(s) in RCA: 84] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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92
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Nakagawa A, Kitagawa A, Asami M, Nakamura K, Schoeller DA, Slater R, Minagawa M, Kaplan IR. Evaluation of isotope ratio (IR) mass spectrometry for the study of drug metabolism. BIOMEDICAL MASS SPECTROMETRY 1985; 12:502-6. [PMID: 2932179 DOI: 10.1002/bms.1200120911] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
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.
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93
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Sasaki S, Aikawa T, Minagawa M, Kobayashi I, Maruyama S. [Loss of neurons in the nucleus basalis of Meynert in Pick disease]. Rinsho Shinkeigaku 1985; 25:812-7. [PMID: 4075645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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94
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Minagawa M, Maeshiro H, Shioda K, Hirano A. Membranous lipodystrophy (Nasu disease): clinical and neuropathological study of a case. Clin Neuropathol 1985; 4:38-45. [PMID: 2983919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
We report a sibling case of Nasu disease. A 35-year-old housewife, whose parents were consanguineous and whose sister died of the same disease, developed dementia, followed by bone fracture, incontinence and convulsions. She died at age 41. Pathologically, characteristic membranocystic changes of the fat cells in bone marrow and adipose tissues were observed. Neuropathologically, there was demyelination associated with intense gliosis and numerous axonal spheroids in the cerebral white matter. At the electron microscope level, these spheroids were an accumulation of various cell organelles. In addition, some had Hirano bodies. Incontinence was correlated with reduction of the number of nerve cells in Onuf's nucleus of the sacral cord.
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95
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Seiga K, Minagawa M, Egawa J, Matsuyama T, Yamaji K, Noma M. [Fundamental and clinical studies on T-1982 (cefbuperazone) in the field of obstetrics and gynecology]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1983; 36:1061-72. [PMID: 6413728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
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.
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96
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Yamaji K, Sugiyama Y, Seiga K, Minagawa M, Egawa J. [Clinical studies on cefoperazone in gynecological field (author's transl)]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1980; 33:782-93. [PMID: 6451725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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97
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Minagawa M. [Peculiar manifestation of cellular immunity in the brain--analysis by experimental brain tumor model]. NO TO SHINKEI = BRAIN AND NERVE 1980; 32:407-12. [PMID: 7378204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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98
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Inoue K, Sobue H, Minagawa M, Tanimura K, Ueki K. [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)]. NO TO SHINKEI = BRAIN AND NERVE 1978; 30:1215-9. [PMID: 728277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
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.
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99
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Sobue H, Tanimura K, Terabayashi T, Minagawa M, Inoue K. [Immunological study of glioma. (2) Changes of immunological responses during treatment]. NO TO SHINKEI = BRAIN AND NERVE 1976; 28:87-93. [PMID: 194609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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100
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Seiga K, Minagawa M, Furuta N, Yamaji K, Sugiyama Y. [Studies on amikacin (BB-K8) (author's transl)]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1974; 27:434-7. [PMID: 4215903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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