226
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Tsutsui T, Ohmori M, Suzuki N, Maizumi H. Dependence of lethality induced by a direct DNA perturbation of synchronized human diploid fibroblasts on different periods of the DNA synthetic period (S phase). J Cell Physiol 1984; 120:219-24. [PMID: 6746748 DOI: 10.1002/jcp.1041200216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The cytotoxic effect of a direct perturbation of DNA during various portions of the DNA synthetic period (S phase) of cultured human diploid fibroblasts was examined. The cells were synchronized by a period of growth in low serum with a subsequent blockage of the cells at the G1/S boundary by hydroxyurea. This method resulted in over 90% synchrony, although approximately 20% of the cells were noncycling. Synchronized cells were treated for each of four 2-hour periods during the S phase with 5-bromodeoxyuridine (0.1-10 microM), followed by irradiation with near-UV (5-10 min). The 5-bromodeoxyuridine-plus-irradiation treatment was cytotoxic, while treatment with 5-bromodeoxyuridine alone or irradiation alone was not cytotoxic. The cytotoxicity was dependent upon the periods of S phase during which treatment was administered. The highest lethality was observed for treatment in early to middle S phase, particularly in the first 2 hours of S phase, whereas scarce lethality was observed in late S phase. The extent of substitution of 5-bromodeoxyuridine for thymidine in newly synthesized DNA was similar in every period of the S phase. Furthermore, no specific period during S phase was significantly more sensitive to treatment with respect to DNA damage, as determined by an induction of unscheduled DNA synthesis. These results suggest that a certain region or regions in the DNA of human diploid fibroblasts, as designated by their specific temporal relationship in the S phase, may be more sensitive to the DNA perturbation by 5-bromodeoxyuridine treatment plus near-UV irradiation for cell survival.
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227
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Chen KM, Sakaguchi T, Ohmori M, Hanabusa M, Kawashima K, Hayashi H, Suehiro K, Ono K. [A case of hyperthyroidism combined with thyroid carcinoma]. GAN NO RINSHO. JAPAN JOURNAL OF CANCER CLINICS 1984; 30:515-518. [PMID: 6727053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A 33-year-old woman, with hyperthyroidism combined with thyroid carcinoma is presented. She was given antithyroid medication before the operation, and sub-total thyroidectomy was performed under local anesthesia. Her postoperative course was smooth. Histologically, the resected thyroid was shown to have two small nodular lesions of papillary carcinoma in the diffuse goiter. The current classification, statistics, diagnosis and therapy of this disease are discussed.
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228
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Tsutsui T, Suzuki N, Ohmori M, Maizumi H. Cytotoxicity, chromosome aberrations and unscheduled DNA synthesis in cultured human diploid fibroblasts induced by sodium fluoride. Mutat Res 1984; 139:193-8. [PMID: 6717484 DOI: 10.1016/0165-7992(84)90127-1] [Citation(s) in RCA: 77] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The effects of exposure of cultured human diploid fibroblasts (JHU-1 cells) to sodium fluoride have been studied with respect to cytotoxicity and induction of chromosome aberrations and unscheduled DNA synthesis (UDS) Cytotoxicity of NaF on JHU-1 cells, as determined by a decrease in colony-forming ability, linearly increased with increasing dose of NaF (50-150 micrograms/ml) or exposure time (1-24 h). Treatment of the cells with 50 micrograms/ml NaF for 24 h resulted in a lethality (approximately 70%) similar to that obtained with 100 micrograms/ml for 12 h. A linear increase in cytotoxicity was observed as a fraction of the product of NaF treatment time and dose. JHU-1 cells treated with 20-50 micrograms/ml NaF for 12 or 24 h were analyzed for chromosome aberrations. A significant increase in the frequency of chromosome aberrations at the chromatid level was observed in treated cells in a dose-dependent manner. For detection of UDS, confluent JHU-1 cells were cultured with medium containing low serum and then exposed to NaF in the presence of 10 mM hydroxyurea. Treatment with 100-400 micrograms NaF/ml for 4-24 h reproducibly elicited UDS in a dose-related fashion as determined by direct scintillation counting of [3H]thymidine incorporated into DNA during repair synthesis. These results suggest that NaF causes DNA damage in human diploid fibroblasts in culture.
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229
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Tsutsui T, Suzuki N, Ohmori M. Sodium fluoride-induced morphological and neoplastic transformation, chromosome aberrations, sister chromatid exchanges, and unscheduled DNA synthesis in cultured syrian hamster embryo cells. Cancer Res 1984; 44:938-41. [PMID: 6692416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The effects of exposure of early-passage Syrian hamster embryo cells in culture to sodium fluoride have been studied with respect to induction of morphological and neoplastic transformation, chromosome aberrations, sister chromatid exchanges, and unscheduled DNA synthesis. Exposure of Syrian hamster embryo cells to NaF concentrations between 75 and 125 micrograms/ml for 24 hr caused approximately 90 to 40% cell survival and resulted in a dose-dependent increase in the frequency of morphological transformation of the cells. Mass cultures of cells treated with NaF (75 or 100 micrograms/ml) for 24 hr, followed by continuous cultivation for 35 to 50 passages, developed the ability to grow in soft agar and to produce anaplastic fibrosarcomas when injected into newborn hamsters. In contrast, no morphological and neoplastic transformation was observed in untreated cells. Furthermore, a significant increase in chromosome aberrations at the chromatid level, sister chromatid exchanges, and unscheduled DNA synthesis was induced by NaF in a dose- and time-dependent manner. These results indicate that NaF is genotoxic and capable of inducing neoplastic transformation of Syrian hamster embryo cells in culture. A potential for carcinogenicity of this chemical, which is widely used by humans, is suggested. However, the carcinogenic risk of this chemical to humans may be reduced by factors regulating in vivo dose levels.
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230
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Tada M, Kuzuya T, Ohmori M. [Antithrombotic agents against platelet aggregation]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1983; 41:2781-6. [PMID: 6687068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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231
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Yamamoto H, Takagi M, Otake S, Ohmori M. Leiomyoma of the right lower gingiva: a case and a review of the Japanese Literature. J Oral Maxillofac Surg 1983; 41:671-5. [PMID: 6578309 DOI: 10.1016/0278-2391(83)90023-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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232
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Tada M, Kuzuya T, Ohmori M. [Biochemistry of coronary artery disease--prostaglandins]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 1983; 31:854-9. [PMID: 6361336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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233
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Kobayashi S, Ohmori M, Akaeda T, Ohmori H, Miyaji Y. Primary adenocarcinoma of the renal pelvis. Report of two cases and brief review of literature. ACTA PATHOLOGICA JAPONICA 1983; 33:589-97. [PMID: 6624446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Two cases of primary adenocarcinoma of the renal pelvis are described. One patient was a 64-year-old female who had multiple papillary tumors in the right ureter and renal pelvis. The other was a 57-year-old male who had diffuse infiltrating carcinoma in the left renal pelvis with calculi. In both cases, the lining of the renal pelvis underwent columnar cell metaplasia and the tumor cells showed mucin production. Forty-six cases reported previously are reviewed briefly. The histogenesis of primary adenocarcinoma of the renal pelvis seems to be closely related to metaplasia of transitional epithelium induced by longstanding chronic inflammation or renal calculi in many cases.
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234
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Yamada S, Ohmori M, Takayama H, Takasaki Y, Suda T. Isolation and identification of 1 alpha- and 23-hydroxylated metabolites of 25-hydroxy-24-oxovitamin D3 from in vitro incubates of chick kidney homogenates. J Biol Chem 1983; 258:457-63. [PMID: 6848514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Five major metabolites (peaks I-V) of 25-hydroxy-24-oxovitamin D3 (25(OH)24-oxo-D3) have been isolated in pure form from in vitro incubates containing kidney homogenates of vitamin D-deficient chicks and chicks given 65 nmol of vitamin D3; peaks II, III, and V are from vitamin D-deficient chicks and peaks I, II, and IV are from vitamin D-supplemented birds. The structures of the metabolites were unequivocally identified as 23,25-dihydroxy-24-oxo-vitamin D3 (peak I), 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) (peak II), 1 alpha, 25-dihydroxy-24-oxovitamin D3 (peak III), 23,24,25-trihydroxyvitamin D3 (peak IV), and 1 alpha,24,25-trihydroxyvitamin D3 (peak V) by means of ultraviolet absorption spectrometry, mass spectrometry, and specific chemical reactions. It is concluded that 25(OH)24-oxo-D3 is further hydroxylated at the 1 alpha-position in the kidney of vitamin D-deficient chicks and at the 23-position in that of vitamin D-supplemented animals. Formation of 24,25(OH)2D3 from 25(OH)24-oxo-D3 in both vitamin D-deficient and -supplemented animals provides evidence for the presence of an enzyme to reduce the 24-oxo group irrespective of the vitamin D status.
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235
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Yamada S, Ohmori M, Takayama H, Takasaki Y, Suda T. Isolation and identification of 1 alpha- and 23-hydroxylated metabolites of 25-hydroxy-24-oxovitamin D3 from in vitro incubates of chick kidney homogenates. J Biol Chem 1983. [DOI: 10.1016/s0021-9258(18)33278-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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236
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Shiina Y, Abe E, Miyaura C, Tanaka H, Yamada S, Ohmori M, Nakayama K, Takayama H, Matsunaga I, Nishii Y, DeLuca HF, Suda T. Biological activity of 24,24-difluoro-1 alpha, 25-dihydroxyvitamin D3 and 1 alpha, 25-dihydroxyvitamin D3-26,23-lactone in inducing differentiation of human myeloid leukemia cells. Arch Biochem Biophys 1983; 220:90-4. [PMID: 6572492 DOI: 10.1016/0003-9861(83)90390-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Vitamin D compounds added to the culture medium induce differentiation of human myeloid leukemia cells (HL-60 cells) by binding to a specific cytosol receptor protein. This system provides a biologically relevant and technically simple assay to examine the relationship between molecular structure and biological activity of vitamin D compounds. Using this culture system, the biological activity of 24,24-F2-1 alpha,25(OH)2D3 and 1 alpha,25(OH)2D3-26,23-lactone was assayed. 24,24-F2-1 alpha,25(OH)2D3 was four to seven times more potent than 1 alpha,25(OH)2D3 in inducing phagocytosis and C3 rosette formation of HL-60 cells, though both compounds bound equally well to the cytosol receptor, suggesting that the defuorination at the 24-carbon position may stimulate membrane permeability of the compound. 1 alpha,25(OH)2D3-26,23-lactone, on the other hand, was only 1/200th as active as 1 alpha,25(OH)2D3. The binding affinity of the lactone for the cytosol receptor was identical with that of 1 alpha (OH)D3, suggesting that the lactone formation between the 26 and 23 positions masks the function of the 25-hydroxyl group. The binding affinity of vitamin D3 derivatives to the specific cytosol receptor of HL-60 cells was well correlated with that of intestinal cytosol protein specifically bound to 1 alpha,25(OH)2D3.
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237
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Ohmori M, Ohmori K. Application of glass fiber paper chromatography to measurement of 15N content of amino acids. RADIOISOTOPES 1982; 31:651-3. [PMID: 7170353 DOI: 10.3769/radioisotopes.31.12_651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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238
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Ohmori M, Kobayashi S, Ohtsuki Y, Ogawa K. Malignant hyperthermia. ACTA PATHOLOGICA JAPONICA 1982; 32:649-56. [PMID: 7113702 DOI: 10.1111/j.1440-1827.1982.tb02066.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A report is made of a 65-year-old male who died of a malignant hyperthermia of 42 degrees C. Symptoms included muscle rigidity at the termination of operation for neck-clipping of an aneurysm of the anterior communicating artery. Latent myopathy was observed in skeletal muscle, and a bleeding focus was present in the left anterior region of the hypothalamus, coinciding with the temperature regulation center. The mechanism of onset of this disease is still poorly understood, but it seems that this disease occurred due to synergic effects of the hypothalamic hemorrhage and the pre-existing myopathy. The serum CPK level at the time of death was abnormally high (250 U), and 3.4% of isozyme CPK1 was detected. The serum myoglobin was 204, 850 ng/ml, a markedly high level, and myoglobinuric nephrosis was present as a result.
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239
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Takasaki Y, Suda T, Yamada S, Ohmori M, Takayama H, Nishii Y. Chemical synthesis, biological activity, and metabolism of 25-hydroxy-24-oxovitamin D3. J Biol Chem 1982; 257:3732-8. [PMID: 7061507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
25-Hydroxy-24-oxovitamin D3 (25(OH)24-oxo-D3), a metabolite of 25-hydroxyvitamin D3, has been chemically synthesized. The ultraviolet, mass, infrared, and proton nuclear magnetic resonance spectra of the 25(OH)24-oxo-D3 were identical with those of the natural product isolated from chick kidney incubates. The oxo compound showed biological activity similar to 24,25-dihydroxyvitamin D3 (24,25(OH)2D3) in vitamin D-deficient chicks in enhancing intestinal calcium transport and bone calcium mobilization activities. Although 25(OH)24-oxo-D3 partially restored the impaired eggshell weights of Japanese quails fed a vitamin D-deficient diet, it was much less potent than 25-hydroxyvitamin D3 or 1 alpha, 25-dihydroxyvitamin D3. In addition, there was no effect on the calcification of medullary bone. When 25(OH)24-oxo[3H]D3 was incubated with kidney homogenates from vitamin D-deficient chicks, it was metabolized to [3H]1 alpha, 24,25-trihydroxyvitamin D3 and a metabolite which was eluted in a region between authentic 24R,25(OH)2D3 and 1 alpha, 25-dihydroxyvitamin D3 on high pressure liquid chromatography. In the incubates of kidney homogenates from vitamin D-supplemented chicks, those metabolites were not detected. In vitamin D-supplemented chicks, the recovery of radioactivity in the chloroform phase extracted by the method of Bligh and Dyer was only 50%, while that in vitamin D-deficient chicks was 87%. Moreover, the radioactivity eluted in the 25(OH)24-oxo-D3 fraction from vitamin D-supplemented chicks was only one-fifth of that from vitamin D-deficient birds. The present results indicate that the 24-oxidation of 24,25(OH)2D3 may be a route of inactivation of vitamin D3.
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240
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Takasaki Y, Suda T, Yamada S, Ohmori M, Takayama H, Nishii Y. Chemical synthesis, biological activity, and metabolism of 25-hydroxy-24-oxovitamin D3. J Biol Chem 1982. [DOI: 10.1016/s0021-9258(18)34842-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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241
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Ohmori M, Shiba K. [Application of immunological tests of the serum and urine--detection of antibody-coated bacteria (ACB) and evaluation of its method]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 1982; Suppl 49:88-93. [PMID: 7050466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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242
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Ohmori M, Ogawa K. The sympathetic hazards of airborne ultrasound on ultrasound sensitive mice. EXPERIMENTAL PATHOLOGY 1982; 22:119-24. [PMID: 7140914 DOI: 10.1016/s0232-1513(82)80033-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A commercially available ultrasonic equipment (55-50 kHz/sec, 425 W) operated at a distance of 4 m air space caused death in some mice. The physical energy propagated was quite small, being calculated at less than 0.21 W/cm2. Among many strains of mice, the RIII strain was especially sensitive to ultrasound, and the peak of sensitivity was at 3 to 4 weeks of age at which the mortality rate was 95/149 (64%). No death occurred when mice were pretreated by (a) removing all body hair, (b) by administration of morphine hydrochloridum with a tail reaction, and (c) administration of a sympathetic blocking agent. From these results it is assumed that the ultrasound energy absorbed by the body fur reaches the hypothalamus through the sensory nerves of the hair roots. After the hypothalamus where central sympathetic nerve functions are localized, the stimulus passes down the descending tract of the sympathetic nerve, reaching the cardiac nerves via the autonomic nerve ganglion. Thus, death could occur by shock of the sympathetic nerve reflex.
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243
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Ohmori M. Present status and history of the mouse colony of Okayama University Medical School. ACTA MEDICA OKAYAMA 1981; 35:293-306. [PMID: 6457517 DOI: 10.18926/amo/31250] [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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244
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Halloran BP, DeLuca HF, Barthell E, Yamada S, Ohmori M, Takayama H. An examination of the importance of 24-hydroxylation to the function of vitamin D during early development. Endocrinology 1981; 108:2067-71. [PMID: 6894423 DOI: 10.1210/endo-108-6-2067] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
To investigate the biological importance of 24R-hydroxylation of 25-hydroxyvitamin D to the early development of rats, the potency of 24,24-difluoro-25-hydroxyvitamin D3 had been compared to that of 25-hydroxyvitamin D3 in young rat pups born to vitamin D-deficient mothers. 24,24-Difluoro-25-hydroxyvitamin D3 and 25-hydroxyvitamin D3 were equally active in stimulating active calcium transport in the intestine, maintaining normal concentrations of calcium and phosphorus in the plasma and promoting bone growth and mineralization. These results provide strong evidence that the presence of a hydroxyl group at the 24 position of vitamin D3 is not required for the maintenance of calcium-phosphate homeostasis during growth and in the development and mineralization of bone.
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245
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Ohmori M, Iizumi H, Hattori A. An improved procedure for 15N determination by emission spectrometry. Anal Biochem 1981; 111:83-6. [PMID: 7235244 DOI: 10.1016/0003-2697(81)90232-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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246
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Yamamoto H, Takagi M, Otake S, Sakata K, Ohmori M, Oikawa T, Izumi H, Ikeshima A, Ozawa M. An idiopathic bone cavity of the mandibular angle: a report on a case and review of Japanese literature. THE JOURNAL OF NIHON UNIVERSITY SCHOOL OF DENTISTRY 1980; 22:227-32. [PMID: 6942124 DOI: 10.2334/josnusd1959.22.227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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247
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Kaneda T, Nagayama M, Ohmori M, Minato F, Nakajima J, Shikimori M. Hemarthrosis of the temporomandibular joint in a patient with hemophilia B: report of case. JOURNAL OF ORAL SURGERY (AMERICAN DENTAL ASSOCIATION : 1965) 1979; 37:513-4. [PMID: 286767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A case of hemophilia B with hemarthrosis in the TMJ, which led to pain and limitation of jaw movement, was successfully controlled by transfusion of Konyne.
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248
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Ohmori M, Ohtsuki Y, Kobayashi S. Activation of an endogenous oncogenic virus by human adenovirus in mice. J Cancer Res Clin Oncol 1979. [DOI: 10.1007/bf00451439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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249
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Ohmori M. Activated endogenous viruses of tumor induced by human adenovirus: an electron microscope study. Exp Mol Pathol 1978; 29:260-71. [PMID: 211048 DOI: 10.1016/0014-4800(78)90044-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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250
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Ohmori M, Ihara H, Saito A. [Antibody-coated bacteria]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1978; Suppl:1278-9. [PMID: 691322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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