101
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Higuchi S, Oya H, Hoshi F, Kawamura S, Yasuda Y. Observations of Babesia gibsoni in midgut epithelial cells of the tick, Haemaphysalis longicornis. THE KITASATO ARCHIVES OF EXPERIMENTAL MEDICINE 1992; 65:143-7. [PMID: 1308256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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102
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Nishi N, Kagawa Y, Miyanaka H, Oya H, Wada F. An anti-probasin monoclonal antibody recognizes a novel 40-kDa protein localized in rat liver and a specific region of kidney urinary tubule. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1117:47-54. [PMID: 1627592 DOI: 10.1016/0304-4165(92)90161-m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Immunoblotting with a monoclonal antibody against probasin (rat prostatic secretory protein) showed that a 40-kDa protein antigenically related to probasin was localized in rat liver and kidney. The contents of probasin in these organs were negligible. Immunostaining revealed that the 40-kDa protein (probasin-related antigen: PRB-RA) was expressed in the liver parenchymal cells and the kidney urinary tubular epithelial cells in outer stripe. The content of PRB-RA in the kidney was low during 0 to 2 weeks of age, then rapidly increased about 10-fold from 2 to 8 weeks of age. The content in the liver increased about 2-fold during the period, reaching a value of 10-12 ng/micrograms protein, which was ten times higher than that in the kidney. PRB-RA was purified from rat liver by ion-exchange chromatography, gel filtration and fast protein liquid chromatography on a hydroxyapatite column. The purified protein formed insoluble aggregates in the absence of a detergent, and it had a blocked amino terminal. The amino acid sequence of a peptide generated by tryptic digestion of alkylated PRB-RA was determined. Computer analysis showed that there was no protein having a significant homology with the peptide. These results indicate that a novel 40-kDa protein with a structural similarity to probasin is localized in rat liver and kidney, and might bear a function specific to these organs.
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103
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Takamiya S, Kita K, Matsuura K, Furushima R, Oya H. Oxidation-reduction potentials of cytochromes in Ascaris muscle mitochondria: high-redox-potential cytochrome b558 in complex II (succinate-ubiquinone reductase). BIOCHEMISTRY INTERNATIONAL 1990; 21:1073-80. [PMID: 2080921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Oxidation-reduction midpoint potentials (Ems) were determined at pH 7.0 for cytochromes in the anaerobic respiratory chain of Ascaris mitochondria by redox titration techniques. Cytochrome b558, which is associated with complex II that functions as fumarate reductase in the terminal step of the respiratory chain, was shown to have an Em of -34 mV in the isolated complex II and -54 mV in mitochondria. These values are much higher than the value of Ascaris cytochrome b558. In contrast, Ems of cytochromes C + C1 and cytochrome b559.5 were determined in situ to be 235 mV and 78 mV, respectively, which are comparable to those of their mammalian counterparts.
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104
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Furushima R, Kita K, Takamiya S, Konishi K, Aoki T, Oya H. Structural studies on three flavin-interacting regions of the flavoprotein subunit of complex II in Ascaris suum mitochondria. FEBS Lett 1990; 263:325-8. [PMID: 2335235 DOI: 10.1016/0014-5793(90)81405-d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The flavoprotein (Fp) subunit of mitochondrial complex II contains covalently bound FAD as a prosthetic group. In this study, the primary structure of the flavin-bound tryptic peptide from the Fp subunit of Ascaris complex II was determined and found to be highly similar to those of the corresponding flavin-binding regions of bovine heart and bacterial Fp subunits. Furthermore, the Ascaris Fp subunit was shown to contain two regions exhibiting striking sequence similarity to the segments that have been predicted to interact noncovalently with the AMP moiety of FAD in bacterial Fp subunits. The conservation of these two regions also in the mitochondrial Fp subunit suggests their functional importance.
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105
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Kita K, Oya H, Gennis RB, Ackrell BA, Kasahara M. Human complex II (succinate-ubiquinone oxidoreductase): cDNA cloning of iron sulfur (Ip) subunit of liver mitochondria. Biochem Biophys Res Commun 1990; 166:101-8. [PMID: 2302193 DOI: 10.1016/0006-291x(90)91916-g] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Complex II (succinate-ubiquinone oxidoreductase) is an important enzyme complex of both the tricarboxylic acid cycle and of the aerobic respiratory chains of mitochondria in eukaryotic cell and prokaryotic organisms. In this study, the amino acid sequence of iron sulfur-subunit in human liver mitochondria was deduced from cDNA which was isolated by immunoscreening a human liver lambda gtll cDNA library. An isolated clone contains an open reading frame of 786 nucleotides and encodes a mature protein of 252 amino acids with a molecular weight of 28,804. The amino acid sequence was highly homologous with that of bovine heart (94.1%) which has been determined from the purified peptide and that of Escherichia coli sdh B product (50.8%). Striking sequence conservation was found around the three cysteine-rich clusters which have been thought to comprise the iron-sulfur centers of the enzyme. This is the first report on the cDNA sequence of mitochondrial complex II.
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106
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Mizuno Y, Ohta S, Tanaka M, Takamiya S, Suzuki K, Sato T, Oya H, Ozawa T, Kagawa Y. Deficiencies in complex I subunits of the respiratory chain in Parkinson's disease. Biochem Biophys Res Commun 1989; 163:1450-5. [PMID: 2551290 DOI: 10.1016/0006-291x(89)91141-8] [Citation(s) in RCA: 522] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Immunoblotting studies on mitochondria prepared from the striata of patients who died of Parkinson's disease were performed using specific antisera against Complexes I, III and IV. In 4 out of 5 patients with Parkinson's disease, the 30-, 25- and 24-kDa subunits of Complex I were moderately to markedly decreased. No clear difference was noted in immunoblotting studies on subunits of Complexes III and IV between the control and Parkinson's disease. Deficiencies in Complex I subunits seem to be one of the most important clues to elucidate pathogenesis of Parkinson's disease.
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107
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Konishi K, Adachi H, Kita K, Takamiya S, Furushima R, Oya H, Horikoshi I. Inhibitory effects of tetragalloylglucose on the complex II of mitochondrial respiratory chain of Ascaris muscle. Chem Pharm Bull (Tokyo) 1989; 37:2533-4. [PMID: 2605704 DOI: 10.1248/cpb.37.2533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The effects of tetragalloylglucose (1,2,3,6-tetra-O-galloyl-beta-D-glucose) on purified complex II (succinate-ubiquinone oxidoreductase) of the mitochondrial electron transport system of Ascaris muscle were studied. Both succinate-ubiquinone-1 (Q1) oxidoreductase, and succinate dehydrogenase measured with 3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyltetrazolium bromide (MTT) in the presence of phenazine methosulfate (PMS) were inhibited by tetragalloylglucose. The inhibitions of both reductase activities of complex II were of competitive type, and the inhibitor constant (Ki) for Ascaris complex II (148 nM) was lower than that for rat liver complex II (1.5 microM). Thus, Ascaris complex II is much more sensitive to this inhibitor than the mammalian counterpart.
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108
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Hata-Tanaka A, Kita K, Furushima R, Oya H, Itoh S. ESR studies on iron-sulfur clusters of complex II in Ascaris suum mitochondria which exhibits strong fumarate reductase activity. FEBS Lett 1988; 242:183-6. [PMID: 2849561 DOI: 10.1016/0014-5793(88)81012-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Complex II of Ascaris suum mitochondria, which functions as fumarate reductase in physiological conditions, contains three types of iron-sulfur clusters. These correspond to clusters S-1, S-2 and S-3 and are distinguishable by low-temperature ESR studies. Cluster S-1 is reduced by succinate, giving ESR signals with gz, gy and gx values at 2.033, 1.939 and 1.920. The existence of cluster S-2 is suggested by an enhancement of the S-1 spin relaxation induced upon reduction of S-2 by dithionite. Cluster S-3 is ESR detectable under air-oxidized conditions and gives a strong signal at g = 2.025. Cluster S-3 was only partially reduced even with an excess amount of sodium succinate, which is a common characteristic of fumarate reductase but this is not seen in the mitochondrial complex II.
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109
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Kita K, Takamiya S, Furushima R, Ma YC, Suzuki H, Ozawa T, Oya H. Electron-transfer complexes of Ascaris suum muscle mitochondria. III. Composition and fumarate reductase activity of complex II. BIOCHIMICA ET BIOPHYSICA ACTA 1988; 935:130-40. [PMID: 2843227 DOI: 10.1016/0005-2728(88)90210-1] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Complex II of the anaerobic respiratory chain in Ascaris muscle mitochondria showed a high fumarate reductase activity when reduced methyl viologen was used as the electron donor. The maximum activity was 49 mumol/min per mg protein, which is much higher than that of the mammalian counterpart. The mitochondria of Ascaris-fertilized eggs, which require oxygen for its development, also showed fumarate reductase activity with a specific activity intermediate between those of adult Ascaris and mammals. Antibody against the Ascaris flavoprotein subunit reacted with the mammalian counterparts, whereas those against the Ascaris iron-sulfur protein subunit did not crossreact, although the amino acid compositions of the subunits in Ascaris and bovine heart were quite similar. Cytochrome b-558 of Ascaris complex II was separated from flavoprotein and iron-sulphur protein subunits by high performance liquid chromatography with a gel permeation system in the presence of Sarkosyl. Isolated cytochrome b-558 is composed of two hydrophobic polypeptides with molecular masses of 17.2 and 12.5 kDa determined by gradient gel, which correspond to the two small subunits of complex II. Amino acid compositions of these small subunits showed little similarity with those of cytochrome b-560 of bovine heart complex II. NADH-fumarate reductase, which is the final enzyme complex in the anaerobic respiratory chain in Ascaris, was reconstituted with bovine heart complex I, Ascaris complex II and phospholipids. The maximum activity was 430 nmol/min per mg protein of complex II. Rhodoquinone was essential for this reconstitution, whereas ubiquinone showed no effect. The results clearly indicate the unique role of Ascaris complex II as fumarate reductase and the indispensability of rhodoquinone as the low-potential electron carrier in the NADH-fumarate reductase system.
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110
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Aoki T, Oya H. Inactivation of Crithidia fasciculata carbamoyl phosphate synthetase II by the antitumor drug acivicin. Mol Biochem Parasitol 1987; 23:173-81. [PMID: 3574357 DOI: 10.1016/0166-6851(87)90153-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In Crithidia fasciculata, carbamoyl phosphate synthetase II, which catalyses the first step of de novo pyrimidine biosynthesis, was separated from aspartate carbamoyltransferase by ammonium sulfate fractionation. The antitumor drug acivicin competitively inhibited the synthetase II activity with respect to L-glutamine, yielding an apparent Ki of 2 microM. In the absence of L-glutamine, acivicin resulted in a selective, time-dependent inactivation of L-glutamine-dependent activity of the enzyme, with an inactivation constant (Kinact) of 100 microM and a minimum inactivation half-time (T) of 0.2 min. L-Glutamine protected the enzyme from inactivation. These results are consistent with a postulate that acivicin is an active site-directed affinity analogue of L-glutamine, achieving irreversible inactivation. The inactivated enzyme retained ammonia-dependent activity. Acivicin stimulated the ammonia-dependent activity by increasing the Vmax value of the enzyme; apparent Km values for ammonia and MgATP were not affected. Differential action of acivicin on the Crithidia and mammalian synthetase II is discussed.
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111
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Aoki T, Oya H. Kinetic properties of carbamoyl-phosphate synthetase II (glutamine-hydrolyzing) in the parasitic protozoan Crithidia fasciculata and separation of the enzyme from aspartate carbamoyltransferase. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1987; 87:143-50. [PMID: 3608429 DOI: 10.1016/0305-0491(87)90481-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A high specific activity of carbamoyl-phosphate synthetase II (glutamine-hydrolyzing; EC 6.3.5.5) was demonstrated in extract of the cultured Crithidia fasciculata. The enzyme was separated from aspartate carbamoyltransferase by ammonium sulfate fractionation. Apparent Km for the synthetase for L-glutamine, NH4+, MgATP or bicarbonate was 0.27, 26, 1.7 or 1.7 mM at 2.0% dimethyl sulfoxide plus 0.3% glycerol. 8.6% dimethyl sulfoxide plus 1.4% glycerol decreased Km for L-glutamine to 0.10 mM, while Km for MgATP was unaffected. The higher solvent concentrations made Vmax markedly reduced, yielding the inhibition of the activity. These properties are unique to the Crithidia synthetase, compared with the mammalian enzyme.
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112
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Aoki T, Oya H. Regulatory properties of carbamoyl-phosphate synthetase II from the parasitic protozoan Crithidia fasciculata. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1987; 87:655-8. [PMID: 2444385 DOI: 10.1016/0305-0491(87)90369-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
1. At the lowered concentrations of 0.5 mM ATP and 1.5 mM MgCl2, 2.0 mM UTP, UDP and UMP inhibited the activity of Crithidia fasciculata carbamoyl-phosphate synthetase II by about 65, 80 and 40% respectively. 2. The result suggests that feedback inhibition of the activity by uridine nucleotides is a mechanism of regulation of the de novo pyrimidine biosynthetic pathway in C. fasciculata. 3. ADP, AMP and CDP inhibited the activity (about 70, 40 and 40%). 4. Excess Mg2+ at around 1 mM, relative to the ATP concentration, was required for the maximum activity. 5. 5-Phosphoribosyl 1-pyrophosphate had no significant effect on the activity under various conditions examined.
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113
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Takamiya S, Furushima R, Oya H. Electron-transfer complexes of Ascaris suum muscle mitochondria. II. Succinate-coenzyme Q reductase (complex II) associated with substrate-reducible cytochrome b-558. BIOCHIMICA ET BIOPHYSICA ACTA 1986; 848:99-107. [PMID: 3753651 DOI: 10.1016/0005-2728(86)90165-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A succinate-coenzyme Q reductase (complex II) was isolated in highly purified form from Ascaris muscle mitochondria by detergent solubilization, ammonium sulfate fractionation and gel filtration on a Sephadex G-200 column. The enzyme preparation catalyzes electron transfer from succinate to coenzyme Q1 with a specific activity of 1.2 mumol coenzyme Q1 reduced per min per mg protein at 25 degrees C. The isolated complex II is essentially free of NADH-ferricyanide reductase, reduced CoQ2-cytochrome c reductase and cytochrome c oxidase and consists of four major polypeptides with apparent molecular weights of 66 000, 27 000, 12 000 and 11 000 and two minor ones with Mr of 36 000 and 16 000. The complex II contained cytochrome b-558, a major constituent cytochrome of Ascaris mitochondria, at a concentration of 3.6 nmol per mg protein, but neither other cytochromes nor quinone. The cytochrome b-558 in the complex II was reduced with succinate. In the presence of Ascaris NADH-cytochrome c reductase (complex I-III) (Takamiya, S., Furushima, R. and Oya, H. (1984) Mol. Biochem. Parasitol. 13, 121-134), the cytochrome b-558 in complex II was also reduced with NADH and reoxidized with fumarate. These results suggest the cytochrome b-558 to function as an electron carrier between NADH dehydrogenase and succinate dehydrogenase in the Ascaris NADH-fumarate reductase system.
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114
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Furukawa Y, Yamamoto T, Kimura S, Hayashi H, Oya H. Biosynthesis of lipids during embryogenesis of Ascaris lumbricoides eggs. TOHOKU J EXP MED 1985; 147:221-34. [PMID: 4089865 DOI: 10.1620/tjem.147.221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Alteration in lipid metabolism of Ascaris lumbricoides eggs during development in either air or nitrogen gas was studied using acetate-1-14C and labeled fatty acids. It is thought that formation of 14C-lipids and 14C-palmitoleate from acetate-1-14C and palmitate-1-14C in developing eggs may be influenced by the concentration of molecular oxygen in the medium. Acetate-1-14C was incorporated into palmitate, palmitoleate and unsaturated 18-carbon acid of fatty acids in the eggs, but the incorporation into saturated 18-carbon acid was slight. Radioactive fatty acid methyl esters were major lipid component of the radioactive lipid classes in the first and second stage larvae incubated with palmitate-1-14C. Isopentadecanoic acid, which is a small component of fatty acids in Ascaris eggs, contains a high percentage of the total radioactivity in the second stage larvae incubated with acetate-1-14C under both air and nitrogen. It appears that a conversion of the fatty acid biosynthesis system may occur during development in to the second stage larvae.
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115
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Takamiya S, Furushima R, Oya H. Electron transfer complexes of Ascaris suum muscle mitochondria: I. Characterization of NADH-cytochrome c reductase (complex I-III), with special reference to cytochrome localization. Mol Biochem Parasitol 1984; 13:121-34. [PMID: 6513990 DOI: 10.1016/0166-6851(84)90107-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An NADH-cytochrome c reductase (complex I-III) was isolated from Ascaris suum muscle mitochondria. The enzyme preparation catalyzed the reduction of 1.68 mumol cytochrome c min-1 mg-1 protein at 25 degrees C with NADH but not with NADPH, and retained its sensitivity to rotenone, piericidin A and 2-heptyl-4-hydroxyquinoline-N-oxide as with the submitochondrial particles. The isolated complex I-III, essentially free of succinate-cytochrome c reductase and cytochrome c oxidase, consisted of fourteen polypeptides with apparent molecular weights ranging from 76 000 to 12 000. The complex I-III contained three cytochromes, b-559.5, b-563 and c1-550.5 and Pigment-558 at concentrations of 1.28, 0.211, 1.23 and 0.321 nmol mg-1 protein, respectively. Cytochrome b-558, a major constituent cytochrome of Ascaris mitochondria and previously suggested to participate in the fumarate reductase system, was not fractionated in the complex I-III. Localization of the cytochromes in Ascaris electron transfer complexes is discussed.
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116
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Murakami H, Kita K, Oya H, Anraku Y. Chromosomal location of the Escherichia coli cytochrome b556 gene, cybA. MOLECULAR & GENERAL GENETICS : MGG 1984; 196:1-5. [PMID: 6237244 DOI: 10.1007/bf00334084] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The amounts of cytochrome b556 in the cytoplasmic membranes of several Escherichia coli K12 strains having F-prime factors and a lambda transducing phage were determined. The amount was amplified about two-fold in strains having F100-12 and F152, but not in strains having F100-11, F8 and lambda psu+2glnS+. The strain TK3D11, which lacks the kdp-gltA region (deletion D-01) of the E. coli chromosome, did not synthesize cytochrome b556 at all. From these results, the gene cybA encoding cytochrome b556 was located in the kdp-gltA region. In the cytochrome b556-deficient mutant, a novel b type cytochrome, cytochrome b561 which is a product of the gene cybB, was identified. It seems to function as a physiological electron transferring cytochrome in place of cytochrome b556 in this mutant.
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117
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Yoshimura K, Uchida K, Sato K, Oya H. Ultrastructural evidence for eosinophil-mediated destruction of Angiostrongylus cantonensis transferred into the pulmonary artery of non-permissive hosts. Parasite Immunol 1984; 6:105-18. [PMID: 6718049 DOI: 10.1111/j.1365-3024.1984.tb00785.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Ultrastructural and cytochemical analyses were carried out on cellular reactions to the young adult worms of Angiostrongylus cantonensis surgically transferred into the pulmonary arteries of permissive (rat) and non-permissive (rabbit and guinea-pig) hosts. In permissive hosts, no appreciable cellular reactions could be found around worms throughout the course of the observations. By contrast, the infiltration of neutrophils along with eosinophils was observed around worms in non-permissive hosts even at early stages (days 2 to 4). At day 7 and later, the prominent degranulation (solubilization of the whole granule or the matrix alone with preserved crystalloid, tubulovesicular structure formation, and vacuole formation containing lysosomal contents, etc.) of eosinophils, and subsequent release of the lysosomal contents on to the worm surface were noted. Discharge of large amounts of peroxidase on to the worm surface was also demonstrated. The worms were thus damaged and their cuticular fragments were frequently found removed. In addition to this, degenerative changes, such as lipid-droplet and vacuole formations, were detectable in the hypodermis, somatic musculature and intestine of the parasites transferred into the non-permissive hosts, as early as day 4 after transfer. These data suggest that eosinophils would serve as a potential effector cell for killing of pulmonary arterial A. cantonensis in non-permissive hosts.
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118
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Aoki T, Yamasaki H, Oya H. Mechanism of inactivation of a Fasciola proteolytic enzyme by peptide aldehydes and alkylating agents. Mol Biochem Parasitol 1983; 8:89-97. [PMID: 6877285 DOI: 10.1016/0166-6851(83)90001-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A proteolytic enzyme of the liver fluke Fasciola sp. was purified as described previously by ammonium sulfate fractionation, gel filtration on Sephadex G-200 column and L-phenylalanine-agarose chromatography. Leupeptin, a peptide aldehyde of microbial origin, competitively inhibited the enzyme activity with respect to the substrate alpha-N-benzoyl-L-argininamide; the apparent Ki value for leupeptin is 45 000-fold less than the apparent Km for the substrate. Incubation of the enzyme with leupeptin resulted in time-dependent inactivation of the globinolytic activity, with an inactivation constant (Kinact) of 0.4 microM giving the half-maximum inactivation velocity, and with a minimum inactivation half-time (T) of 2.7 min at infinite concentration of this compound. The inactivated enzyme was not reactivated by extensive dialysis. These results imply that leupeptin yields an affinity labelling of an active site of the enzyme. The activity of the Fasciola proteolytic enzyme was also inactivated by other peptide aldehydes and alkylating agents and inactivation constants observed were 0.5 microM for chymostatin, 13 microM for antipain, 2 microM for p-toluenesulfonyl-L-lysine chloromethyl ketone, 140 microM for p-toluenesulfonyl-L-phenylalanine chloromethyl ketone and 40 microM for iodoacetate under the conditions used.
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119
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Yoshimura K, Sato K, Uchida K, Oya H. The course of Angiostrongylus cantonensis infection in athymic nude and neonatally thymectomized mice. ZEITSCHRIFT FUR PARASITENKUNDE (BERLIN, GERMANY) 1982; 67:217-26. [PMID: 6981266 DOI: 10.1007/bf00928117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BALB/c athymic nude and thymus-reconstituted nude mice and neonatally thymectomized BALB/c mice were infected with stage 3 larvae of Angiostrongylus cantonensis and the worm burdens of the mice were determined at various times after infection. When the nude and thymectomized mice were exposed to the parasite, some worms were found to migrate from the brain to lungs but died there without reaching maturity. This pulmonary arterial migration of the worms in the nude did not occur following thymic reconstitution. These data suggest that the inability of murine intracranial worms to migrate to the lungs is at least in part due to thymus-dependent mechanisms, and also that the failure of worm maturation in mouse lungs might be due to thymus-independent immune mechanisms and/or nonimmunological mechanisms.
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120
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Yoshimura K, Sato K, Oya H. Angiostrongylus cantonensis: rejection of pulmonary arterial transfers of lung stage worms. Exp Parasitol 1981; 51:1-7. [PMID: 7461084 DOI: 10.1016/0014-4894(81)90035-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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121
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Yoshimura K, Sato K, Oya H, Nakagawa M. Transfer of young adult Angiostrongylus cantonensis from mastomys and mice to the pulmonary arteries of rats immunized against the donor hosts. NIHON JUIGAKU ZASSHI. THE JAPANESE JOURNAL OF VETERINARY SCIENCE 1980; 42:567-72. [PMID: 7230566 DOI: 10.1292/jvms1939.42.567] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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122
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Yoshimura K, Aiba H, Oya H, Fukuda Y. Angiostrongylus cantonensis: development following pulmonary arterial transfers into permissive and nonpermissive hosts. Exp Parasitol 1980; 49:339-52. [PMID: 7371736 DOI: 10.1016/0014-4894(80)90070-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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123
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Aoki T, Oya H, Mori M, Tatibana M. Control of pyrimidine biosynthesis in the Ascaris ovary: regulatory properties of glutamine-dependent carbamoyl-phosphate synthetase and copurification of the enzyme with aspartate carbamoyltransferase and dihydroorotase. Mol Biochem Parasitol 1980; 1:55-68. [PMID: 6108508 DOI: 10.1016/0166-6851(80)90041-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Glutamine-dependent carbamoyl-phosphate synthetase, the first enzyme of the de novo biosynthetic pathway for pyrimidine nucleotides, was purified about twenty-fold from 105 000 x g supernatant of the Ascaris ovary homogenate. The enzyme activity was feedback-inhibited by UDP and UTP while it was stimulated by 5-phosphoribosyl 1-pyrophosphate. Most of the catalytic and regulatory properties of the Ascaris synthetase were similar to those of the mammalian synthetase. A significant difference is that the Ascaris enzyme was more strongly inhibited by UDP than by UTP whereas the mammalian enzyme is more sensitive to UTP than to UDP. The Ascaris enzyme was also inhibited by other various nucleoside diphosphates, such as dUDP, dADP and CDP, generally more strongly than by the corresponding nucleoside triphosphates. Aspartate carbamoyltransferase and dihydroorotase, the second and third enzymes of the pathway, were also demonstrated in the supernatant fraction. These two enzymes were copurified with the synthetase and the relative activities of the three enzymes remained nearly constant (1:850-890:50-60) throughout the purification. In a sucrose gradient centrifugation, the enzymes cosedimented as a single peak with a sedimentation coefficient (s20,w) of about 32 S under the condition used. These results strongly suggest that the enzymes exist as a multienzyme complex similar to those found in higher animals. The activity of the carbamoyltransferase was insensitive to nucleotides and related compounds. These results indicate that the synthetase plays a key role in the control of pyrimidine biosynthesis in the Ascaris ovary.
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Yoshimura K, Aiba H, Oya H. Transplantation of young adult Angiostrongylus cantonensis into the rat pulmonary vessels and its application to the assessment of acquired resistance. Int J Parasitol 1979; 9:97-103. [PMID: 437939 DOI: 10.1016/0020-7519(79)90097-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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125
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Aoki T, Oya H. Glutamine-dependent carbamoyl-phosphate synthetase and control of pyrimidine biosynthesis in the parasitic helminth Schistosoma mansoni. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1979; 63:511-5. [PMID: 45544 DOI: 10.1016/0305-0491(79)90055-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1. Carbomoyl-phosphate synthetase in Schistosoma mansoni utilizes L-glutamine as well as ammonia as nitrogen donor but does not require N-acetyl-L-glutamate for the activity. 2. The enzyme activity was inhibited by UDP, UTP, ADP and AMP, among which UDP was the most effective. 3. Aspartate carbamoyltransferase and dihydroorotase were also found and copurified with the synthetase. 4. Relative activities among these three enzymes were 1:30-60:3-8 throughout the purification. 5. These results suggest that the synthetase plays a key role in the control of pyrimidine biosynthesis de novo.
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Yoshimura K, Aiba H, Oya H. Transplantation of intracranial young adult Angiostrongylus cantonensis into the subdural spaces of the brains of rats and guinea pigs. NIHON JUIGAKU ZASSHI. THE JAPANESE JOURNAL OF VETERINARY SCIENCE 1978; 40:623-7. [PMID: 713222 DOI: 10.1292/jvms1939.40.623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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127
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Hino M, Fuyamada H, Hayakawa T, Nagatsu T, Oya H. X-Prolyl dipeptidyl-aminopeptidase activity, with X-proline p-nitroanilides as substrates, in normal and pathological human sera. Clin Chem 1976. [DOI: 10.1093/clinchem/22.8.1256] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
X-Prolyl dipeptidyl-aminopeptidase (no EC no. assigned) activity in normal and pathological human sera was assayed with several newly synthesized X-proline p-nitroanilides as chromogenic substrates. Normal values for 88 healthy subjects (15 to 81 years old), with glycylproline p-nitroanilide as substrate at pH 8.7, were 54.9 +/- 1.5 (SE) (range, 25.7 - 96.0) mumol/min per liter of serum at 37 degrees C. The results suggest that the enzyme activities with all X-proline p-nitroanilides were increased in patients with hepatitis and decreased in patients with gastric cancer. On Sephadex G-200 column chromatography, normal human sera showed a single peak of enzyme activity with glycylproline p-nitroanilide as the substrate, which coincided with the peak with glycylproline beta-naphthylamide but was different from the peaks with leucine beta-naphthylamide. Sera from patients with hepatitis or liver cirrhosis showed an increase in the normal peak and the appearance of another new peak with glycylproline p-nitroanilide as substrate.
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Hino M, Fuyamada H, Hayakawa T, Nagatsu T, Oya H. X-Prolyl dipeptidyl-aminopeptidase activity, with X-proline p-nitroanilides as substrates, in normal and pathological human sera. Clin Chem 1976; 22:1256-61. [PMID: 949833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
X-Prolyl dipeptidyl-aminopeptidase (no EC no. assigned) activity in normal and pathological human sera was assayed with several newly synthesized X-proline p-nitroanilides as chromogenic substrates. Normal values for 88 healthy subjects (15 to 81 years old), with glycylproline p-nitroanilide as substrate at pH 8.7, were 54.9 +/- 1.5 (SE) (range, 25.7 - 96.0) mumol/min per liter of serum at 37 degrees C. The results suggest that the enzyme activities with all X-proline p-nitroanilides were increased in patients with hepatitis and decreased in patients with gastric cancer. On Sephadex G-200 column chromatography, normal human sera showed a single peak of enzyme activity with glycylproline p-nitroanilide as the substrate, which coincided with the peak with glycylproline beta-naphthylamide but was different from the peaks with leucine beta-naphthylamide. Sera from patients with hepatitis or liver cirrhosis showed an increase in the normal peak and the appearance of another new peak with glycylproline p-nitroanilide as substrate.
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129
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Oya H, Weinstein PP. Demonstration of cobamide coenzyme in Ascaris suum. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1975; 50:435-42. [PMID: 1116348 DOI: 10.1016/0305-0491(75)90255-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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130
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Oya H, Harada M, Nagatsu T. Peptidase activity of glycylprolyl beta-naphthylamidase from human submaxillary gland. Arch Oral Biol 1974; 19:489-91. [PMID: 4531301 DOI: 10.1016/0003-9969(74)90158-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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131
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132
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Oya H, Nagatsu I, Nagatsu T. Purification and properties of glycylprolyl -naphthylamidase in human submaxillary gland. BIOCHIMICA ET BIOPHYSICA ACTA 1972; 258:591-9. [PMID: 5062248 DOI: 10.1016/0005-2744(72)90251-3] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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133
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Oya H. [Cause of burns]. [KANGO GIJUTSU] : [NURSING TECHNIQUE] 1971; 17:101-10. [PMID: 5210216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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134
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Harada M, Oya H, Nakano G, Kuzuya H, Nagatsu T. Intracellular localization of monoamine oxidase in mammalian salivary glands. J Dent Res 1971; 50:1290-3. [PMID: 5285789 DOI: 10.1177/00220345710500053401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Intracellular distribution of monoamine oxidase in the submaxillary gland of the human, cat, rat, and bovine, and in the parotid gland of the bovine, were determined using kynuramine as a substrate. The excretion of the enzyme in the parotid saliva of humans was also examined by sensitive fluorometric methods.
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Oya H, Nagatsu T, Kobayashi Y, Takei M. Arylaminopeptidase activities in human cariogenic and non-cariogenic oral bacteria. Arch Oral Biol 1971; 16:675-80. [PMID: 4997488 DOI: 10.1016/0003-9969(71)90073-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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136
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Oya H, Yamamoto J, Maeda K, Nakashima M, Sekiya A. [Action of bradykinin on the heart and the effects of several drugs on its mechanism]. Nihon Yakurigaku Zasshi 1971; 67:49-58. [PMID: 4396035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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137
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Oya H, Nagatsu I, Harada M, Nagatsu T. Hydrolysis of amino acid beta-naphthylamides by aminopeptidases in the parotid gland. EXPERIENTIA 1970; 26:252-3. [PMID: 5417480 DOI: 10.1007/bf01900076] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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138
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Maeda K, Oya H, Yamada K, Yamamoto J, Nakashima M. Acute toxicity and pharmacological actions of rosolic acid. NAGOYA JOURNAL OF MEDICAL SCIENCE 1970; 32:453-8. [PMID: 5448984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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139
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Uete T, Nishimura S, Oya H, Shimomura T, Tatebayashi Y. Corticosteroid levels in blood and cerebrospinal fluid in various diseases. J Clin Endocrinol Metab 1970; 30:208-14. [PMID: 5413649 DOI: 10.1210/jcem-30-2-208] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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140
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Oya H. [Antibradykinin action of some drugs and mechanism of venoconstrictive action of bradykinin in the rabbit]. Nihon Yakurigaku Zasshi 1969; 65:501-14. [PMID: 4390940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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141
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Oya H, Hirako I, Yamamoto J, Maeda K, Nakashima M. [Vascular action of bradykinin. Anti-bradykinin actions of some drugs on the isolated jugular veins of rabbits]. ARERUGI = [ALLERGY] 1969; 18:529-30. [PMID: 4390425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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142
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Oya H, Yamamoto T, Nagatsu T. Presence of leucine aminopeptidase activity in human saliva from the parotid gland and the submaxillary-sublingual glands. Arch Oral Biol 1968; 13:941-8. [PMID: 5250211 DOI: 10.1016/0003-9969(68)90010-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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143
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Oya H, Murayama E, Okino M. [Primary lung cancer found following mastectomy for breast cancer]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 1968; 21:510-4. [PMID: 5750412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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144
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Oya H. [Statistics of burns]. GEKA CHIRYO. SURGICAL THERAPY 1968; 18:635-46. [PMID: 5755267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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145
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Yamamoto J, Hirako I, Oya H, Sekiya A, Kanda Z. [Vascular actions of bradykinin. Experiments using Ringer's solution as the perfusate and medium]. ARERUGI = [ALLERGY] 1968; 17:283-4. [PMID: 5677400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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146
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Hirako I, Yamamoto J, Oya H, Sekiya A, Kanda Z. [Vascular actions of bradykinin. Experiments using blood as perfusate]. ARERUGI = [ALLERGY] 1968; 17:284-5. [PMID: 5677401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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147
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148
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Nagatsu T, Oya H, Kato K, Kuzuya H. [Peroxidase activity of the saliva. 3. Activities of the salivary glands]. IGAKU TO SEIBUTSUGAKU. MEDICINE AND BIOLOGY 1967; 74:192-4. [PMID: 6070142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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149
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Costello LC, Smith W, Oya H. The comparative biochemistry of developing Ascaris eggs. VII. Malate oxidation and metabolism in unembryonated eggs. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY 1967; 21:161-70. [PMID: 4382290 DOI: 10.1016/0010-406x(67)90125-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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150
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Nagatsu T, Kuzuya H, Harada M, Oya H. [Secretion of injected vitamin B2 into the saliva]. IGAKU TO SEIBUTSUGAKU. MEDICINE AND BIOLOGY 1966; 73:128-9. [PMID: 6009131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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