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Abstract
The biosynthesis of benastatin A, produced by Streptomyces sp. MI384-DF12, has been studied by feeding experiments with 14C- and 13C-labeled compounds followed by measurement of radioactivity and 13C NMR analysis. The results indicate that benastatin A is derived from two methionine units and fourteen acetate units, condensed in the "head-to-tail" fashion of typical polyketide biosynthesis.
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102
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Aoyama T, Naganawa H, Muraoka Y, Aoyagi T, Takeuchi T. The structure of cyclooctatin, a new inhibitor of lysophospholipase. J Antibiot (Tokyo) 1992; 45:1703-4. [PMID: 1474002 DOI: 10.7164/antibiotics.45.1703] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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103
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Inoue H, Endo M, Takeshita K, Yoshino K, Muraoka Y, Yoneshima H. A new simplified technique of endoscopic esophageal mucosal resection using a cap-fitted panendoscope (EMRC). Surg Endosc 1992; 6:264-5. [PMID: 1465738 DOI: 10.1007/bf02498820] [Citation(s) in RCA: 136] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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104
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Inoue H, Muraoka Y, Kobori Y, Hirata R, Takeshita K, Goseki N, Yoneshima H, Endo M. Combination therapy of laparoscopic cholecystectomy and endoscopic transpapillary lithotripsy for both cholecystolithiasis and choledocholithiasis. Surg Endosc 1992; 6:246-8. [PMID: 1465733 DOI: 10.1007/bf02498813] [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: 12/27/2022]
Abstract
This report describes five patients with cholecystolithiasis and choledocholithiasis who were treated by combination endoscopic extraction of common bile-duct stones with sphincterotomy (EST) and laparoscopic cholecystectomy (LC). Following this combination procedure the patients were relieved completely of obstructive jaundice and right upper quadrant pain, leaving only small trocar insertion scars made during the short course of hospitalization. The combination therapy of EST and LC will be recommended for this kind of patient as a minimally invasive procedure.
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105
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Aoyama T, Naganawa H, Muraoka Y, Nakamura H, Aoyagi T, Takeuchi T, Iitaka Y. Benastatins A and B, new inhibitors of glutathione S-transferase, produced by Streptomyces sp. MI384-DF12. II. Structure determination of benastatins A and B. J Antibiot (Tokyo) 1992; 45:1391-6. [PMID: 1429223 DOI: 10.7164/antibiotics.45.1391] [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: 12/27/2022]
Abstract
Benastatins A and B, new inhibitors of glutathione S-transferase, have been isolated from the culture broth of Streptomyces sp. MI384-DF12. By X-ray crystallography, benastatin A was determined to be 8,13-dihydro-1,7,9,11-tetrahydroxy-13-dimethyl-8-oxo-3-pentyl- benzo[a]naphthacene-2-carboxylic acid. The structure of benastatin B was elucidated by NMR studies.
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106
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Komagata D, Sawa T, Muraoka Y, Imada C, Okami Y, Takeuchi T. TA-3037A, a new inhibitor of glutathione S-transferase, produced by actinomycetes. I. Production, isolation, physico-chemical properties and biological activities. J Antibiot (Tokyo) 1992; 45:1117-21. [PMID: 1517156 DOI: 10.7164/antibiotics.45.1117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
TA-3037A, a new inhibitor of glutathione S-transferase was discovered in the fermentation broth of Streptomyces sp. TA-3037. It was purified by chromatography followed by solvent extraction and then isolated as yellow needles. TA-3037A has the molecular formula of C16H11NO4. It was competitive with the substrate, and the inhibition constant (Ki) was 4.9 microM.
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107
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Komagata D, Muraoka Y, Sawa R, Takahashi Y, Naganawa H, Sawa T, Takeuchi T. TA-3037A, a new inhibitor of glutathione S-transferase, produced by actinomycetes. II. Structure determination. J Antibiot (Tokyo) 1992; 45:1122-4. [PMID: 1517157 DOI: 10.7164/antibiotics.45.1122] [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: 12/27/2022]
Abstract
TA-3037A, a new inhibitor of glutathione S-transferase, has been isolated from the culture broth of Streptomyces sp. TA-3037. The structure of TA-3037A was defined as (Z)-3-benzylidene-3,4-dihydro-2-oxo-2H-1,4-benzoxazine-5-carboxylic acid by an analysis of spectral properties and chemical studies of TA-3037A and its derivatives.
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108
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Inoue H, Takemura K, Hori H, Itoh K, Muraoka Y, Yoneshima H, Endo M. Sclerotherapy of internal hemorrhoids using newly devised transparent disposable anorectoscope. Surg Endosc 1992; 6:125-7. [PMID: 1502679 DOI: 10.1007/bf02309083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We devised a transparent anorectoscope for internal hemorrhoidal sclerotherapy. Using this scope the grade of hemorrhoids of the patients can be evaluated accurately through the transparent wall of the scope, and the device facilitates easier and safer sclerotherapy under clear direct vision, compared to the conventional free-hand-style treatment. We conclude that sclerotherapy using this anorectoscope represents a minimally invasive treatment for low-grade internal hemorrhoids and is recommendable for outpatient therapy of internal hemorrhoids.
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109
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Hatsu M, Tuda M, Muraoka Y, Aoyagi T, Takeuchi T. Benarthin: A new inhibitor of pyroglutamyl peptidase. III. Synthesis and structure-activity relationships. J Antibiot (Tokyo) 1992; 45:1088-95. [PMID: 1355473 DOI: 10.7164/antibiotics.45.1088] [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: 11/21/2022]
Abstract
Benarthin, a new inhibitor of pyroglutamyl peptidase (PG-peptidase), has been isolated from the culture filtrate of Streptomyces xanthophaeus MJ244-SF1. The structure of benarthin has been determined to be L-(2,3-dihydroxybenzoyl)arginyl-L-threonine. This structure was confirmed by the total synthesis of benarthin. Moreover, we synthesized benarthin derivatives to obtain information on the relationship between structure and inhibitory activity. The results indicated that the catechol group of benarthin is the essential moiety for the inhibition of PG-peptidase.
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110
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Muraoka Y, Komiya S. [Equation for estimating total body water by bioelectrical impedance measurements in Japanese subjects]. THE ANNALS OF PHYSIOLOGICAL ANTHROPOLOGY = SEIRI JINRUIGAKU KENKYUKAI KAISHI 1991; 10:203-10. [PMID: 1810307 DOI: 10.2114/ahs1983.10.203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This article reports a study in which the equation for total body water (TBW) estimated from deuterium (2H2O)-dilution method and bioelectrical impedance measurement (BIM) is described. Subjects were 60 healthy males aged 30 +/- 18.3 yr (18-74) and 31 healthy females aged 37 +/- 17.5 yr (19-70). Total body water determined by the analysis of the dilution of orally ingested deuterium oxide (1g2H2O, 99.75 atom % excess/kg body weight) in urine. Bioelectrical impedance was measured for each subjects in a supine position using an electrical impedance analyzer (500 microA, 50kHz, T-1988K, Toyo Physical Inc.) with a four electrodes (Y-250, Nihon Kohden). The mean values of total body water and the impedance in males and females subjects were 34.1 +/- 4.27 l and 25.7 +/- 2.42 l, 567 +/- 28.5 omega and 562 +/- 32.5 omega, respectively. Height squared divided by resistance (Ht2/R) correlated well with TBW as measured by 2H2 O, r = 0.530 (p less than 0.001) in males and r = 0.782 (p less than 0.001) in females. The best-fitting regression equation to predict TBW comprised Ht2/R(X1) and body weight (X2) (R = 0.915, SEE = 1.70 l in males and R = 0.834, SEE = 1.28 l in females). Equations were provided with BIM instrument for the prediction of TBW: for males TBW, l = 0.1983X1 + 0.4004X2 - 0.7938 and for females TBW, l = 0.3536X1 + 0.1269X2 + 3.3417. These results suggest that bioelectrical impedance measurement is a useful measure of total body water in Japanese subjects.
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111
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Nagai M, Ogawa K, Muraoka Y, Naganawa H, Aoyagi T, Takeuchi T. Poststatin, a new inhibitor of prolyl endopeptidase, produced by Streptomyces viridochromogenes MH534-30F3. II. Structure determination and inhibitory activities. J Antibiot (Tokyo) 1991; 44:956-61. [PMID: 1938618 DOI: 10.7164/antibiotics.44.956] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Poststatin, a new inhibitor of prolyl endopeptidase, has been isolated from the culture broth of Streptomyces viridochromogenes MH534-30F3. The structure of poststatin was defined as L-valyl-L-valyl-3-amino-2-oxovaleryl-D-leucyl-L-valine by analysis of spectral properties and chemical studies of poststatin and its derivatives. The alpha-keto group of postine in poststatin plays the most important role on the inhibitory mechanism.
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112
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Iwai T, Sakurazawa K, Sato S, Muraoka Y, Inoue Y, Endo M. Intra-operative monitoring of the pelvic circulation using a transanal Doppler probe. EUROPEAN JOURNAL OF VASCULAR SURGERY 1991; 5:71-4. [PMID: 2009989 DOI: 10.1016/s0950-821x(05)80930-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The authors have developed a new device to examine the pre-, intra-, and postoperative pelvic blood flow, consisting of a plastic rectoscope with a commercially available 10 MHz flat Doppler probe mounted at the tip surrounded in use by a thin, acoustic gel filled condom and inserted transanally. Blood flow in the superior rectal artery can easily be detected in this way through the posterior wall of the rectum. The authors have used this technique in 70 patients, 49 undergoing abdominal aortic aneurysmectomy and 21 aorto-femoral bypass surgery. In all cases following clamping of the infrarenal aorta a synthetic bifurcated graft was anastomosed usually to the aorta using an end-to-end or end-to-side anastomosis. Immediately after application of the aortic clamp the Doppler recorder was started in order to determine the time when rectal blood flow reappeared. In the superior mesenteric artery dominant group, a good pulse wave was seen within 15 min of clamping and 88% of the aneurysm and 62% of the aorto-iliac patients fell into this group. Fourteen patients in this group underwent triple vessel ligation (bilateral internal iliac and inferior mesenteric arteries) without any postoperative colonic ischaemia. In an additional study consisting of eight patients with vasculogenic impotence and/or hip claudication, the effectiveness of surgery was assessed by the increase in amplitude of the Doppler signals following reconstruction of the internal iliac artery. Following successful internal iliac reconstruction, an improvement in the amplitude of the waveform could be observed and followed postoperatively. In conclusion, the transanal Doppler probe can be used to follow the adequacy of the pelvic circulation allowing safer aorto-iliac and aorto-femoral surgery.
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113
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Nogami T, Shigihara Y, Matsuda N, Takahashi Y, Naganawa H, Nakamura H, Hamada M, Muraoka Y, Takita T, Iitaka Y. Neopyrrolomycin, a new chlorinated phenylpyrrole antibiotic. J Antibiot (Tokyo) 1990; 43:1192-4. [PMID: 2211383 DOI: 10.7164/antibiotics.43.1192] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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114
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Muraoka Y, Watanabe H, Matsui S, Nara H, Kasai H. [Ifosfamide-induced urinary bladder lesion and its inhibition by mesna]. Nihon Yakurigaku Zasshi 1990; 96:73-83. [PMID: 2121633 DOI: 10.1254/fpj.96.2_73] [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: 12/30/2022]
Abstract
This study examined the characteristics of urinary bladder lesions (cystitis) induced by ifosfamide (IF), an antitumor agent, and their inhibition by mesna in rats. Single i.v. doses of 50 mg/kg or more of IF induced cystitis characterized by increased bladder weight with mucosal hemorrhage and edema within 3 hr, with a plateau being reached 1 to 3 days after the injection. This change occurred earlier than myelotoxicity. Injection of IF to ureter-ligated rats did not induce the cystitis. Also, when IF was infused to one of a pair of rats in which the ureters had been crossed, the cystitis occurred only in the non-injected member of the pair whose bladder received urine flow from the IF-injected rat. Cystitis did not occur with direct injection of 10 mg of IF into the urinary bladder, but did with injection of the metabolite, 14 micrograms of acrolein. These findings show that IF-induced cystitis is not a systemic effect like myelotoxicity or an antitumor effect but a local effect. The cystitis could be completely inhibited by mesna, and this effect, which was dose-dependent, occurred from one-tenth of the IF dose. The effect was strongest when mesna was administrated within 1 hr of the IF injection. There was little difference in the effect between single and divided doses. The combined administration of IF with mesna did not lower the antitumor effect of IF.
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115
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Qian SX, Iwai T, Endo M, Sato S, Muraoka Y, Inoue Y. Comparison of arteriosclerosis obliterans of lower limbs between China and Japan. THE BULLETIN OF TOKYO MEDICAL AND DENTAL UNIVERSITY 1990; 37:19-26. [PMID: 2225282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Clinical data on 50 patients with arteriosclerosis obliterans (ASO) in China (Group A) and Japan (Group B) respectively were studied for better understanding of these changing trends. The results showed that the incidence of ASO peaked in Group A in the 50 to 69 age range (88%) and in Group B in the 55 to 74 age range (78%). Group A had a lower ratio of smokers and cases of diabetes mellitus than Group B but a higher ratio of hypertension and a higher total cholesterol level. Angiography showed that the prevalence of atherosclerotic lesions in the lower extremities as a whole was similar for both groups. They were different in location, extent and severity of the arteries involved between the two groups. We believe that this study has shown various differences between the two groups but that the causes are probably multifactorial.
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116
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Fukushima K, Muraoka Y, Inoue T, Shimozawa R. Conformational study of poly(L-lysine) interacting with acidic phospholipid vesicles. Biophys Chem 1989; 34:83-90. [PMID: 2611343 DOI: 10.1016/0301-4622(89)80045-6] [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: 01/01/2023]
Abstract
Circular dichroism measurements were carried out on poly(L-lysine) in the presence of vesicles of the negatively charged phospholipids, phosphatidylserine (PS; from bovine brain), phosphatidic acid (PA; prepared from egg yolk lecithin) and dimyristoylphosphatidylglycerol (DMPG). PS vesicles induced a conformational change in poly(L-lysine) from random coil to alpha-helix structure in 5 mM Tes (pH 7.0), whereas PA vesicles gave rise to beta-structure in the same buffer. The fraction of alpha-helix, F alpha (or beta-structure, F beta), increased with increasing PS (or PA) concentration, reaching a saturation value of about 0.7 (or about 1). Mixed vesicles comprising PS and dilauroylphosphatidylcholine (DLPC) also induced alpha-helix conformation, however, the saturation value of F alpha diminished with decreasing PS content in mixed vesicles. On the other hand, the spectral patterns for poly(L-lysine) in DMPG vesicle suspensions exhibited the coexistence of alpha-helix and beta-structure. Both F alpha and F beta increased with DMPG concentration and reached saturation values of about 0.5. Mixed vesicles composed of DMPG and dimyristoylphosphatidylcholine (DMPC) led to a reduction in F beta, while F alpha remained almost constant. The diversity in ordered structure induced by different phospholipid vesicles suggests the participation of lipid head groups in determining the secondary structure of poly(L-lysine) adsorbed on the vesicular surface.
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117
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Iwai T, Sato S, Sakurazawa K, Muraoka Y, Endo M. Use of transanal intubation in Doppler ultrasonic assessment of blood flow of the rectal wall. SURGERY, GYNECOLOGY & OBSTETRICS 1989; 169:263-4. [PMID: 2672389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
To date, tentative early use of these newly designed Doppler probes to evaluate intestinal or pelvic blood flow, using transanal intubation, seems to be considerably effective and has produced easily obtainable and repeatable results preoperatively, intraoperatively and postoperatively. No complications using this technique have yet been observed.
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118
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Iwai T, Sato S, Muraoka Y, Sakurazawa K, Kinoshita H, Inoue Y, Endo M, Yoshida T. The assessment of pelvic circulation after internal iliac arterial reconstruction: a retrospective study of the treatment for vasculogenic impotence and hip claudication. THE JAPANESE JOURNAL OF SURGERY 1989; 19:549-55. [PMID: 2687527 DOI: 10.1007/bf02471662] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The standard surgical treatment of vasculogenic impotence or hip claudication involves repairing vascular lesions, especially in the internal iliac arteries. It is difficult, however, to make a definite diagnosis or an accurate judgement of the therapeutic effects of this treatment due to the trouble in ruling out any other disorders. During the last five years, 19 patients with impotence and associated apparent internal iliac artery stenosis or occlusion and 2 patients with hip claudication, underwent internal iliac arterial reconstruction. The patients' ages ranged from 37 to 70 with a mean age of 63.7 and the main procedure performed in all patients was aorto-iliac to femoral bypass grafting, or abdominal aortic aneurysmectomy. A retrospective study revealed that 74 per cent of those treated regained penile erectile activity postoperatively, and that hip claudication disappeared completely in all cases. One of the patients received percutaneous transluminal angioplasty (PTA) for the treatment of vasculogenic impotence, after which his postoperative penile brachial pressure index (PBPI) improved, demonstrating a statistically significant difference compared to the preoperative value. Trans-anal Doppler measurement also proved useful in providing complication-free perioperative understanding of pelvic circulation.
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119
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Iwai T, Sato S, Yamada T, Muraoka Y, Sakurazawa K, Inoue Y, Kinoshita H, Endo M. A new treatment for ischemic ulcers: foot bath therapy using high oxygen soluble fluid. THE JOURNAL OF CARDIOVASCULAR SURGERY 1989; 30:490-3. [PMID: 2745538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We devised a new treatment for ischemic ulcer in which the diseased foot is soaked in perfluorodecalin, a fluorocarbon. Pure oxygen bubbles emerge from the perfluorodecalin, and dissolved oxygen levels reach 35% by volume within 60 minutes. The solution is placed in a bath once or twice a day for 2-3 hours and pure oxygen is allowed to bubble through it (3-5 1/min). Nine patients were treated by this technique. Drugs which seemed to have an effect on ischemic ulcers were not used during the treatment. Ischemic ulcers in three patients (5 X 5 mm, 23 X 6 mm and 10 X 5 mm) healed completely within two weeks and there were no recurrences. In six patients, the ulcers showed 30-70% reductions in size within 4 to 14 days. Four of them later underwent arterial reconstruction, which resulted in complete healing of the ulcers. In two patients, the ulcers reverted to their former size 6 to 12 months after the cessation of perfluorodecalin bath therapy.
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120
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Naganawa H, Kadokura Y, Muraoka Y, Nakatani T, Takita T. Carbon-13 NMR assignment of peplomycin. J Antibiot (Tokyo) 1989; 42:633-6. [PMID: 2470721 DOI: 10.7164/antibiotics.42.633] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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121
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Fukushima K, Muraoka Y, Inoue T, Shimozawa R. Conformational change of poly(L-lysine) induced by lipid vesicles of dilauroylphosphatidic acid. Biophys Chem 1988; 30:237-44. [PMID: 3207843 DOI: 10.1016/0301-4622(88)85019-1] [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: 01/04/2023]
Abstract
The effect of negatively charged dilauroylphosphatidic acid (DLPA) vesicles on the conformation of poly(L-lysine) was investigated by circular dichroism measurements. DLPA vesicles induced a conformational change of poly(L-lysine) from the random coil to beta-structure in 5 mM Tes, pH 7.0. The fraction of induced beta-structure (F beta) was determined via a procedure of curve fitting of the observed spectra to the reference spectra. F beta increased linearly with the molar ratio, r, of DLPA to lysine residues up to r congruent to 0.7, and reached a saturation value of 1 at r greater than 1. Within the range 0.7 less than or equal to r less than or equal to 1, precipitation occurred. The effect of dilution of the negative charge on vesicle membranes was examined by mixing DLPA with dilauroylphosphatidylcholine (DLPC). Although the beta-structure of poly(L-lysine) was also induced by mixed vesicles, the saturation value of F beta decreased with decreasing DLPA content in mixed vesicles. The variation in saturation value of F beta with the composition of mixed vesicles was interpreted in terms of the change in average distance between DLPA head groups in mixed vesicles.
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122
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Muraoka Y, Watanabe H, Kometani M, Hasegawa T. Effect of androgens on phalloidin-induced liver toxicity in mice. Toxicol Lett 1988; 40:203-8. [PMID: 3354004 DOI: 10.1016/0378-4274(88)90042-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A single i.p. dose of phalloidin, 0.75 or 1 mg/kg body weight, induced peliosis hepatis-like lesion (PHLL) at 3 h after injection to mice. Pretreatment with various doses of testosterone propionate for 7 days enhanced phalloidin-induced PHLL. Other anabolic steroids, methyltestosterone, methandriol. fluoxymesterone and oxymetholone had no effect.
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123
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Inoue T, Muraoka Y, Fukushima K, Shimozawa R. Interaction of surfactants with vesicle membrane of dipalmitoylphosphatidylcholine: fluorescence depolarization study. Chem Phys Lipids 1988; 46:107-15. [PMID: 3342455 DOI: 10.1016/0009-3084(88)90120-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The effect of surfactants on the "fluidity" of dipalmitoylphosphatidylcholine (DPPC) vesicle membrane was studied by means of the fluorescence depolarization technique with fatty acid fluorescent probes, in which the anthroyloxy group is introduced at different positions along the acyl chain. Three types of surfactants were examined; anionic sodium alkylsulfates, cationic alkyltrimethylammonium chlorides, and non-ionic alkanoyl-N-methylglucamides (MEGA-n). Perturbing effects of the surfactants depended on both the alkyl chain-length and the type of head group. Sodium alkylsulfates with octyl- and decyl-chain and alkyltrimethylammonium chlorides with octyl-, decyl- and dodecyl-chain did not affect the membrane fluidity when incorporated in the membrane, whereas sodium dodecylsulfate and tetradecyltrimethylammonium chloride decreased the membrane fluidity at both gel and liquid crystalline states of the membrane. All the MEGA series surfactants decreased the membrane fluidity, whose perturbing potency was in the order of MEGA-8 less than MEGA-9 approximately equal to MEGA-10. The perturbation at different depths in the membrane by sodium dodecylsulfate and MEGA-9 was also examined. No significant change in the fluidity gradient across the membrane was induced by the addition of these surfactants.
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124
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Iwai T, Sato S, Yamada T, Muraoka Y, Sakurazawa K, Kinoshita H, Inoue Y, Endo M, Yoshida T, Suzuki S. Popliteal vein entrapment caused by the third head of the gastrocnemius muscle. Br J Surg 1987; 74:1006-8. [PMID: 3690223 DOI: 10.1002/bjs.1800741117] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Three cases of the popliteal vein entrapment syndrome have been encountered during the past 3 years. The third head of the gastrocnemius muscle appeared to be the cause of this rare condition with the vessels in their normal position. Partial resection of the excess muscle was sufficient to relieve symptoms.
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125
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Inoue Y, Iwai T, Sakurazawa K, Muraoka Y, Sato S. Pathological considerations of reoperative vascular patients. THE BULLETIN OF TOKYO MEDICAL AND DENTAL UNIVERSITY 1987; 34:53-9. [PMID: 2964940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Since vascular disease is always progressive and a perfect vascular prosthesis has yet to be developed, postoperative complications are almost inevitable. In this paper, case histories of those who had to have a second operation or, in other words, re-operated patients, have been examined to ascertain the current problems in vascular surgery. Of 176 vascular reconstructive operations performed between January 1, 1980, and December 31, 1986, 29 re-operations were performed on 19 patients (mean age: 64 years; 15: male). The incidence of late graft failures was 8.4% and, of these, anastomotic aneurysms seemed to be the most serious complication (3.1% incidence rate). Late graft failures included intimal hyperplasia, occurring within two years in five cases, and four cases of progressing atherosclerosis, which appeared three years after the initial operation. In all cases of anastomotic aneurysm, arterial wall failure, possibly combined with the changing of implanted grafts, was considered to be related to the false aneurysmal formation. Knitted Dacron demonstrated susceptibility to atherosclerotic progression, whereas the major fault of polytetrafluoroethylene (PTFE) grafts was the insufficiency of the anastomotic diameter. In conclusion, it was revealed that many factors can provoke late graft failure. Improvement of long-term patency seems to be achieved by a more increased understanding of the pathological meaning of these factors, along with the proper application of medical techniques suited to the causes of vascular obstruction.
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126
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Nishikiori T, Naganawa H, Muraoka Y, Aoyagi T, Umezawa H. Plipastatins: new inhibitors of phospholipase A2, produced by Bacillus cereus BMG302-fF67. III. Structural elucidation of plipastatins. J Antibiot (Tokyo) 1986; 39:755-61. [PMID: 3089999 DOI: 10.7164/antibiotics.39.755] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Plipastatins are new inhibitors of phospholipase A2 produced by Bacillus cereus BMG302-fF67. Structures of the plipastatins have been determined by UV, mass and NMR spectrometries and chemical degradation. The carboxyl group of the C-terminal L-isoleucine of plipastatinic acid has been shown to form a lactone linkage with the hydroxyl group of L-tyrosine. The total structure of plipastatins has thus been established.
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Nishikiori T, Naganawa H, Muraoka Y, Aoyagi T, Umezawa H. Plipastatins: new inhibitors of phospholipase A2, produced by Bacillus cereus BMG302-fF67. II. Structure of fatty acid residue and amino acid sequence. J Antibiot (Tokyo) 1986; 39:745-54. [PMID: 3089998 DOI: 10.7164/antibiotics.39.745] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Plipastatins, new inhibitors of phospholipase A2, were produced by a strain classified as Bacillus cereus BMG302-fF67. The plipastatins are a family of acylated decapeptides which differ from each other by amino acid composition and the nature of the fatty acid side chain. The fatty acids have been shown to be 3(R)-hydroxyhexadecanoic acid (n-C16h3) and 14(S)-methyl-3(R)-hydroxyhexadecanoic acid (a-C16h3) by mass, NMR and optical rotation. Amino acid sequence analysis by secondary ion mass spectrometry and additional physico-chemical evidence indicate that the structures of plipastatinic acids, the lactone-opened peptides are as follows: beta-Hydroxy fatty acid----L-Glu----D-Orn----L-Tyr----D-allo-Thr----L-Glu----D-Ala(Val)---- L-Pro----L-Gln----D-Tyr----L-Ile X OH.
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128
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Nishikiori T, Naganawa H, Muraoka Y, Aoyagi T, Umezawa H. The conformational studies of plipastatin A1 by 400 MHz proton magnetic resonance. J Antibiot (Tokyo) 1986; 39:860-3. [PMID: 3733534 DOI: 10.7164/antibiotics.39.860] [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: 01/07/2023]
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129
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Yoshida T, Okada Y, Yoshimatsu T, Suzuki S, Iwai T, Muraoka Y. [Percutaneous transluminal angioplasty by Fogarty-Chin balloon catheter]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1985; 30:1603-5. [PMID: 2939270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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130
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Makino S, Muraoka Y, Kishimoto Y, Hayashi Y. Genetic analysis for insulitis in NOD mice. JIKKEN DOBUTSU. EXPERIMENTAL ANIMALS 1985; 34:425-31. [PMID: 3910444 DOI: 10.1538/expanim1978.34.4_425] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Non-obese diabetic (NOD) mice spontaneously develop diabetic signs akin to those of Type I diabetes in man. Insulitis, i.e., lymphocytic infiltration around and into the pancreatic islets is one of the characteristics of such mice. It is also the etiologic pathological lesion in the development of diabetes mellitus in NOD mice. Thus, we chose insulitis as a marker for genetic analysis of the development of diabetes mellitus in NOD mice and clarified the mode of its inheritance. In breeding studies between NOD and C57BL/6J mice, insulitis was not observed in the F1 and (F1 X C57BL/6J) backcross generations, but was found with incidences of 3.9% in females and 1.4% in males in the F2 generation and 23.7% in females and 12.1% in males in the (F1 X NOD) backcross generation. These incidences in the F2 and (F1 X NOD) backcross females corresponded approximately to 1/16 and 1/4 of the incidences of 89.7% in the NOD females, respectively. A similar relationship was observed between the F2 and (F1 X NOD) backcross males and the NOD males. When the gene expressivity of both sexes for a double recessive homozygote was assumed to be the incidences of insulitis in 9-week-old NOD females and males, respectively, the expected numbers of both sexes with and without insulitis in the F2 and backcross generations agreed well with the observed ones. These observations suggest that two recessive genes on independent autosomal chromosomes are necessary for the development of insulitis in NOD mice.
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Abstract
Rabbit antisera highly specific to the bleomycinic acid moiety of bleomycins were obtained by immunizing with a conjugate of copper-complex of bleomycin A5 and bovine serum albumin. These antisera not only reacted with bleomycin A5 but also with other bleomycins such as bleomycin A2, bleomycin B2 and peplomycin. The antisera showed little cross-reactivity with deamido-, depyruvamido- and decarbamoyl-bleomycins. Thus, these antisera were found to be highly specific for the intact bleomycinic acid moiety. One of the antisera was successfully applied to radioimmunoassay of bleomycin and peplomycin in mouse and human sera. The detection limit was 1 ng/ml. This radioimmunoassay is expected to be widely used for the determination of active bleomycins in biological and clinical samples.
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Zhu B, Morioka M, Nakamura H, Naganawa H, Muraoka Y, Okami Y, Umezawa H. A new antitumor antibiotic, dioxolamycin. J Antibiot (Tokyo) 1984; 37:673-4. [PMID: 6547711 DOI: 10.7164/antibiotics.37.673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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133
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Nishikiori T, Kawahara F, Naganawa H, Muraoka Y, Aoyagi T, Umezawa H. Production of acetyl-L-leucyl-L-argininal, inhibitor of dipeptidyl aminopeptidase III by bacteria. J Antibiot (Tokyo) 1984; 37:680-1. [PMID: 6378862 DOI: 10.7164/antibiotics.37.680] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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134
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Akaza H, Koseki K, Kobayashi K, Niijima T, Soloway MS, Iwabuchi M, Muraoka Y. [Experimental intravesical treatment of bladder tumor with Concanavalin-A conjugated bleomycin]. Nihon Hinyokika Gakkai Zasshi 1984; 75:211-4. [PMID: 6205207 DOI: 10.5980/jpnjurol1928.75.2_211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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135
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Mera T, Okano T, Muraoka Y, Ishikawa I, Nakamura T, Kinoshita S. [Efficacy of photographic subtraction radiography in detecting proximal bone lesions]. NIHON SHISHUBYO GAKKAI KAISHI 1983; 25:908-18. [PMID: 6373971] [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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136
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Nishihara T, Oda S, Osada Y, Muraoka Y, Kowashi Y, Kinoshita S. [Root Surface area. 3: surface areas of root trunks, furcations and divisional roots of molars]. NIHON SHISHUBYO GAKKAI KAISHI 1983; 25:393-398. [PMID: 6579142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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137
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Muraoka Y, Kinoshita S. [Improvement of periodontal tissue by minor tooth movement]. NIHON SHISHUBYO GAKKAI KAISHI 1983; 25:378-84. [PMID: 6579141] [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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138
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Motoya K, Shapiro S, Muraoka Y. Small angle elastic and inelastic neutron scattering in Fe0.7Al0.3. ACTA ACUST UNITED AC 1983. [DOI: 10.1016/0378-4363(83)90358-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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139
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Saito S, Umezawa Y, Yoshioka T, Takita T, Umezawa H, Muraoka Y. An improved total synthesis of bleomycin. J Antibiot (Tokyo) 1983; 36:92-5. [PMID: 6206046 DOI: 10.7164/antibiotics.36.92] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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140
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Muraoka Y, Sueda T, Kinoshita S. [Examination of periodontal tissue with an ultrasonic apparatus. Measurements of the thickness of gingiva, alveolar mucosa and alveolar bone]. NIHON SHISHUBYO GAKKAI KAISHI 1982; 24:601-6. [PMID: 6963309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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141
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Harada Y, Kobayashi F, Muraoka Y, Hasegawa Y, Wold JS, Morton DM. An evaluation of the toxicity of moxalactam in laboratory animals. REVIEWS OF INFECTIOUS DISEASES 1982; 4 Suppl:S536-45. [PMID: 6218564 DOI: 10.1093/clinids/4.supplement_3.s536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The toxicity of moxalactam in laboratory animals was evaluated with six species. The acute toxicity of moxalactam was lower than that of cefazolin. The subchronic and chronic toxicity of moxalactam was studied for periods of one to six months at dosages of 100-3,500 mg/kg per day in rats, 100-1,600 mg/kg per day in dogs, and 100-500 mg/kg per day in monkeys. Treatment-related effects were limited to soft stool, cecal dilatation, and slight anemia resulting from local injury at the injection site in the higher dosage groups. All the effects were reversible and less severe than those caused by cefazolin. Studies of reproduction in rats, mice, and rabbits indicated that moxalactam had no teratogenicity and no adverse effects on fertility of parental animals and on gestation or growth and reproductive capacity of offspring. Comparative studies of nephrotoxiticity in rabbits demonstrated that moxalactam was considerably less nephrotoxic than cefazolin, cefotiam, and cefotaxime.
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Yahata S, Hagiwara S, Matsuo R, Muraoka Y, Oda S, Seki T, Osada Y, Izumi Y, Mera T, Fukuda M, Kimura Y, Yokota M, Noguchi T, Ishikawa I, Kinoshita S. [Prevalence of periodontal disease in 15-year-old schoolchildren in Japan. Part II: Regarding alveolar bone resorption]. NIHON SHISHUBYO GAKKAI KAISHI 1982; 24:476-84. [PMID: 6962267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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143
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Muraoka Y. Fluoxymesterone-induced inclusion bodies in dog liver. Exp Mol Pathol 1982; 37:15-25. [PMID: 6288442 DOI: 10.1016/0014-4800(82)90018-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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144
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Osada Y, Oda S, Iida M, Taguchi S, Muraoka Y, Kowashi Y, Kinoshita S. [Root surface area. Part 2. The change of the root surface area corresponding with periodontal tissue reduction]. NIHON SHISHUBYO GAKKAI KAISHI 1982; 24:293-8. [PMID: 6957485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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145
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Oda S, Osada Y, Iida M, Taguchi S, Muraoka Y, Kowashi Y, Kinoshita S. [Root surface area. Part 1. Measurements and total root surface area]. NIHON SHISHUBYO GAKKAI KAISHI 1982; 24:285-92. [PMID: 6957484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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146
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Muraoka Y. [Examination of periodontal tissue with the ultrasonic apparatus. Survey of the marginal form of alveolar bone (author's transl)]. NIHON SHISHUBYO GAKKAI KAISHI 1982; 24:40-53. [PMID: 6954219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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147
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Suzuki H, Muraoka Y, Saitoh M, Kamide K. Upper and lower critical solution temperatures in 2-butanone solutions of cellulose diacetate. ACTA ACUST UNITED AC 1982. [DOI: 10.1002/pi.4980140105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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148
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Muraoka Y, Nara H, Yoshizaki T, Harada Y. [Chronic toxicity study of latamoxef in beagle dog (author's transl)]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1982; 35:222-239. [PMID: 6461778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Chronic toxicity study of latamoxef (LMOX, 6059-S) by intravenous administration at dose levels of 100, 200 and 400 mg/kg daily for 6 months was carried out in adult Beagle dogs. All dogs of the 6059-S treated groups survived throughout the experimental period without showing any toxic signs other than occasional vomiting. Slight decrease of RBC, Ht, Hb and platelet, and increase of reticulocytes were noted in the 400 mg/kg group. Blood chemistry revealed decreased activity in GPT in the 6059-S treated groups, and increased contents of total protein and lipids in the 400 mg/kg group. These clinical changes were slight and transient in most instances. Liver and kidneys weights increased slightly without accompanying any pathological alterations. Inflammatory changes, probably due to mechanical irritation, were found in the subcutis and around the vein at the injection sites in all groups including the mannitol control group. From these results it is concluded that the maximum nontoxic dose in dogs is in the range of 200 to 400 mg/kg when the 6059-S was intravenously administered daily for 6 months.
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Suzuki H, Muraoka Y, Satio M, Kamide K. Light-scattering study on cellulose diacetate in 2-butanone. Eur Polym J 1982. [DOI: 10.1016/0014-3057(82)90154-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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150
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Sugiura Y, Suzuki T, Muraoka Y, Umezawa Y, Takita T, Umezawa H. Deglyco-bleomycin-iron complexes: implications for iron-binding site and role of the sugar portion in bleomycin antibiotics. J Antibiot (Tokyo) 1981; 34:1232-6. [PMID: 6173372 DOI: 10.7164/antibiotics.34.1232] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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