1
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Naito R, Shiraishi T, Hosoi N, Watanabe T, Shioi I, Shibasaki Y, Nakazawa N, Osone K, Okada T, Sano A, Sakai M, Ogawa H, Sohda M, Shirabe K, Saeki H. Squamous cell carcinoma of the anus successfully treated with multidisciplinary therapy for metachronous metastatic and local recurrences after DCF chemotherapy: a case report. Surg Case Rep 2024; 10:71. [PMID: 38526705 DOI: 10.1186/s40792-024-01873-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/18/2024] [Indexed: 03/27/2024] Open
Abstract
BACKGROUND Docetaxel, cisplatin, and 5-fluorouracil (DCF) chemotherapy is reportedly an effective treatment strategy for squamous cell carcinoma of the anus (SCCA). However, studies regarding its use in Japanese patients remain scarce. CASE PRESENTATION Here, we present the case of an 82-year-old woman with SCCA, cStage IIIB. Chemoradiotherapy was initiated after colostomy of the anorectal mass; however, para-aortic lymph node recurrence was observed 3 months after treatment completion. Five courses of DCF chemotherapy were subsequently administered, resulting in a complete response (CR). Two years and 1 month later, the aortic lymph node was enlarged again, and the patient achieved CR again after radiotherapy. Nine months later, local recurrence was detected in the anal canal, and laparoscopic perineal rectal amputation was performed. The patient remains progression-free 5 years and 10 months after the initial treatment and 1 year and 7 months after the final treatment. CONCLUSIONS Our findings suggest that complementary treatment after DCF chemotherapy may be efficacious in Japanese patients with SCCA and help achieve CR. Despite occasional local recurrences, this approach may help achieve long-term progression-free survival.
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Affiliation(s)
- Ryozan Naito
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Nobuhiro Hosoi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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2
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Naito R, Nakazawa N, Zennyoji D, Shimizu T, Hosoi N, Watanabe T, Shioi I, Shibasaki Y, Osone K, Okada T, Shiraishi T, Sano A, Sakai M, Ogawa H, Sohda M, Uraoka T, Shirabe K, Saeki H. Retrograde drainage for duodenal stump leakage using ileal decompression tube guided by double-balloon endoscopy: a novel case report. Surg Case Rep 2024; 10:44. [PMID: 38368309 PMCID: PMC10874345 DOI: 10.1186/s40792-024-01842-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/08/2024] [Indexed: 02/19/2024] Open
Abstract
BACKGROUND Duodenal stump leakage is a serious post-gastrectomy complication, and there have been no reports on endoscopic drainage. CASE PRESENTATION We report a case of duodenal stump leakage after laparoscopic gastrectomy with Roux-en-Y reconstruction in a 68-year-old man. First-line conservative management was ineffective. Reoperation was performed because of severe abdominal pain and increased ascites. After reoperation, duodenal stump leakage recurred with bleeding from the anterior superior pancreaticoduodenal artery. Coil embolization and pigtail catheter insertion were performed. Furthermore, we retrogradely inserted an ileal tube for tube decompression near the duodenal stump using double-balloon endoscopy for effective drainage. After tube insertion, duodenal stump leakage decreased; on the 47th primary postoperative day, the patient was discharged. The primary postoperative course was uneventful after 1 year and 9 months of follow-up. CONCLUSIONS This is the first successful case of duodenal stump leakage treated with retrograde decompression tube insertion near the duodenal stump using double-balloon endoscopy.
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Affiliation(s)
- Ryozan Naito
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Nobuhiro Nakazawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan.
| | - Dan Zennyoji
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Takehiro Shimizu
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Nobuhiro Hosoi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takayoshi Watanabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Ikuma Shioi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Yuta Shibasaki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Katsuya Osone
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuhisa Okada
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Takuya Shiraishi
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Akihiko Sano
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sakai
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroomi Ogawa
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Makoto Sohda
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Toshio Uraoka
- Department of Gastroenterology and Hepatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ken Shirabe
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
| | - Hiroshi Saeki
- Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-15, Showa-Machi, Maebashi, Gunma, 371-8511, Japan
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Brüggen M, Strobl J, Koszik F, Naito R, Stary G, Kiprov H, French L, Stingl G. 055 The leukocyte compartment of subcutaneous white adipose tissue: major differences as to skin and blood. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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4
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Isogai H, Naito R, Kasai T, Miyazaki T, Yokoyama K, Tokano T, Miyauchi K, Nakazato Y, Daida H. P3474Temporal trends in clinical features and outcomes in the elderly following percutaneous coronary intervention. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H Isogai
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - R Naito
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - T Kasai
- Juntendo University, Department of Cardiovascular medicine, Tokyo, Japan
| | - T Miyazaki
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - K Yokoyama
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - T Tokano
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - K Miyauchi
- Juntendo Tokyo Koto Geriatric Medical Center, Cardiology, Tokyo, Japan
| | - Y Nakazato
- Juntendo Urayasu Hospital, Heart Center, Urayasu, Japan
| | - H Daida
- Juntendo University, Department of Cardiovascular medicine, Tokyo, Japan
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5
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Yatsu S, Naito R, Kasai T, Matsumoto H, Shitara J, Shimizu M, Murata A, Kato T, Suda S, Hiki M, Sai E, Miyauchi K, Daida H. P6408Association between sleep disordered breathing assessed by pulse oximetry and long-term clinical outcomes in patients with coronary artery disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Yatsu
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - R Naito
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - T Kasai
- Juntendo University Graduate School of Medicine, Cardiovascular Respiratory Sleep Medicine, Tokyo, Japan
| | - H Matsumoto
- Juntendo University Graduate School of Medicine, Cardiovascular Respiratory Sleep Medicine, Tokyo, Japan
| | - J Shitara
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - M Shimizu
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - A Murata
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - T Kato
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - S Suda
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - M Hiki
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
| | - E Sai
- Juntendo Tokyo Koto Geriatric Medical Center, Department of Cardiology, Tokyo, Japan
| | - K Miyauchi
- Juntendo Tokyo Koto Geriatric Medical Center, Department of Cardiology, Tokyo, Japan
| | - H Daida
- Juntendo University School of Medicine, Department of Cardiology, Tokyo, Japan
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6
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Shitara J, Kasai T, Miyauchi K, Endo H, Wada H, Doi S, Naito R, Konishi H, Tsuboi S, Ogita M, Dohi T, Okazaki S, Isoda K, Daida H. P6535Differing efficacy of beta blockers on long-term clinical outcomes between ischemic heart failure patients with reduced and mid-range ejection fraction following percutaneous coronary intervention. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Shitara
- Juntendo University, Circulation, Tokyo, Japan
| | - T Kasai
- Juntendo University, Circulation, Tokyo, Japan
| | - K Miyauchi
- Juntendo University, Circulation, Tokyo, Japan
| | - H Endo
- Juntendo University, Circulation, Tokyo, Japan
| | - H Wada
- Juntendo University, Circulation, Tokyo, Japan
| | - S Doi
- Juntendo University, Circulation, Tokyo, Japan
| | - R Naito
- Juntendo University, Circulation, Tokyo, Japan
| | - H Konishi
- Juntendo University Shizuoka Hospital, Circulation Department, Izunokuni, Japan
| | - S Tsuboi
- Juntendo University Shizuoka Hospital, Circulation Department, Izunokuni, Japan
| | - M Ogita
- Juntendo University Shizuoka Hospital, Circulation Department, Izunokuni, Japan
| | - T Dohi
- Juntendo University, Circulation, Tokyo, Japan
| | - S Okazaki
- Juntendo University, Circulation, Tokyo, Japan
| | - K Isoda
- Juntendo University, Circulation, Tokyo, Japan
| | - H Daida
- Juntendo University, Circulation, Tokyo, Japan
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7
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Wada H, Dohi T, Miyauchi K, Shitara J, Endo H, Doi S, Konishi H, Naito R, Tsuboi S, Ogita M, Kasai T, Hassan A, Okazaki S, Isoda K, Suwa S, Daida H. Long-term clinical impact of serum albumin in coronary artery disease patients with preserved renal function. Nutr Metab Cardiovasc Dis 2018; 28:285-290. [PMID: 29289574 DOI: 10.1016/j.numecd.2017.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 11/21/2017] [Accepted: 11/21/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND AND AIMS Low serum albumin level is reportedly associated with worse clinical outcomes in patients with chronic kidney disease (CKD). However, associations between decreased serum albumin level and outcomes in non-CKD patients with coronary artery disease (CAD) remain unclear. Therefore, we aimed to evaluate the prognostic value of serum albumin concentrations in stable CAD patients with preserved renal function. METHODS AND RESULTS We studied 1316 patients with CAD and preserved renal function (estimated glomerular filtration rate ≥60 mL/min/1.73 m2) who underwent their first PCI between 2000 and 2011 and had data available for pre-procedural serum albumin. Patients were assigned to quartiles based on pre-procedural albumin concentrations. The incidence of major adverse cardiac events (MACE), including all-cause death and non-fatal myocardial infarction, was evaluated. Mean albumin concentration was 4.1 ± 0.4 g/dL. During the median follow-up of 7.5 years, 181 events occurred (13.8%). Kaplan-Meier curves revealed that patients with decreased serum albumin concentrations showed a higher event rate for MACE (log-rank, p < 0.0001). Using the highest tertiles (>4.3 g/dL) as reference, adjusted hazard ratios were 1.97 (95% CI, 1.12-3.55), 1.77 (95% CI, 0.99-3.25), and 1.19 (95% CI, 0.68-2.15) for serum albumin concentrations of <3.9, 3.9-4.0, and 4.1-4.3 g/dL, respectively. Decreased serum albumin concentration was associated with MACE even after adjusting for other independent variables (HR, 2.21 per 1-g/dL decrease; 95% CI, 1.37-3.56, p = 0.001). CONCLUSION Decreased serum albumin concentration independently predicted worse long-term prognosis in non-CKD patients after PCI. Pre-procedural serum albumin concentration could offer a useful predictor for patients with CAD and preserved renal function.
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Affiliation(s)
- H Wada
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - T Dohi
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan.
| | - K Miyauchi
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - J Shitara
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - H Endo
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - S Doi
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - H Konishi
- Department of Cardiovascular Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - R Naito
- Department of Cardiovascular Medicine, Juntendo University Urayasu Hospital, Urayasu, Chiba, Japan
| | - S Tsuboi
- Department of Cardiovascular Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - M Ogita
- Department of Cardiovascular Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - T Kasai
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - A Hassan
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan; Department of Cardiology, Suez Canal University, Ismailia, Egypt
| | - S Okazaki
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - K Isoda
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - S Suwa
- Department of Cardiovascular Medicine, Juntendo University Shizuoka Hospital, Izunokuni, Shizuoka, Japan
| | - H Daida
- Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
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8
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Naito R, Koga K, Masaki M, Fujii N, Ito K, Koga M, Imafuku S. Multiple verrucous lesions of the feet in Waldenström macroglobulinaemia. Clin Exp Dermatol 2017; 43:103-105. [PMID: 29055121 DOI: 10.1111/ced.13248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2017] [Indexed: 11/29/2022]
Affiliation(s)
- R Naito
- Department ofDermatology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - K Koga
- Department ofPathology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - M Masaki
- Division of Oncology, Haematology and Infectious Diseases, Department of Internal Medicine, Fukuoka University, Fukuoka, Japan
| | - N Fujii
- Department ofDermatology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - K Ito
- Department ofDermatology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - M Koga
- Department ofDermatology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - S Imafuku
- Department ofDermatology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
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9
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Endo H, Iwata H, Naito R, Wada H, Doi S, Konishi H, Tsuboi S, Ogita M, Dohi T, Kasai T, Okazaki S, Isoda K, Miyauchi K, Daida H. P5336Persistent higher high sensitivity C-reactive protein after percutaneous coronary intervention (PCI) predicts higher mortality in patients undergoing PCI with stable coronary artery disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Takahashi N, Ogita M, Miyauchi K, Wada H, Naito R, Konishi H, Tsuboi S, Dohi T, Kasai T, Okazaki S, Isoda K, Suwa S, Bujo H, Daida H. P4941Impact of LR11 as residual risk on long term clinical outcomes in patients with coronary artery disease treated with statin after first percutaneous coronary intervention. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p4941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Goto S, Koike E, Tanaka M, Komai S, Narita M, Sekimoto M, Tashiro Y, Naito R, Kitano M. Reduced incidence of hepatitis in blood-recipients by means of donor-screening by electro-dermatography. Bibl Haematol 2015; 23:1058-61. [PMID: 5879439 DOI: 10.1159/000384357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Morimoto T, Henmi M, Naito R, Tsubaki K, Aoki N, Bird JP, Ochiai Y. Resonantly enhanced nonlinear conductance in long quantum point contacts near pinch-off. Phys Rev Lett 2006; 97:096801. [PMID: 17026388 DOI: 10.1103/physrevlett.97.096801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2005] [Indexed: 05/12/2023]
Abstract
We report on a remarkable resonance in the differential conductance of long quantum point contacts (QPCs) that is observed as a precursor to regular quantized transport. This effect is increasingly pronounced in longer QPCs, in which the differential conductance may resonantly exceed 2e2/h. From a study of the experimental characteristics of this feature, we suggest that it may be associated with the formation of a well-resolved energy gap that opens dynamically as a result of enhanced many-body interactions in long QPCs.
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Affiliation(s)
- T Morimoto
- Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba 263-8522, Japan
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13
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Abstract
In a previous report, we showed abnormal auditory evoked potentials in the mutant hamster, 'black tremor (bt)', with significantly prolonged wave latencies of auditory brainstem responses and prolonged N1 latencies of compound action potentials, but normal cochlear microphonics. In this report, we present the results of morphological studies supporting the results of our electrophysiological studies of the auditory pathway in bt. Observation by transmission electron microscopy revealed an abnormal myelin sheath surrounding the spiral ganglion cells, and a thinner compact myelin sheath surrounding the axons in bt than in normal hamsters. The bt hamster has a myelin deficiency not only in the brainstem, but also in the cochlear nerve.
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Affiliation(s)
- R Naito
- Department of Otorhinolaryngology, University of Tokyo, Tokyo, Japan.
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14
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Ikeda Y, Mochizuki M, Naito R, Nakamura K, Miyazawa T, Mikami T, Takahashi E. Predominance of canine parvovirus (CPV) in unvaccinated cat populations and emergence of new antigenic types of CPVs in cats. Virology 2000; 278:13-9. [PMID: 11112475 DOI: 10.1006/viro.2000.0653] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Serological, sequence, and in vitro host range analyses of feline parvovirus (FPV) isolates in Vietnam and Taiwan revealed that more than 80% of the isolates were of the canine parvovirus (CPV) type, rather than feline panleukopenia virus (FPLV). Although parvovirus isolates from three Vietnamese leopard cats were genetically related to CPV type 2a or 2b, they had a natural mutation of VP2 residue 300 Gly to an Asp, resulting in remarkable changes in their antigenic properties. These results indicated the possibility that CPV-2a/2b-type viruses can spread in cats more efficiently than conventional FPLV under natural conditions and that CPV-2a/2b viruses are further evolving in cats.
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Affiliation(s)
- Y Ikeda
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, Bunkyo-ku, Tokyo, 113-8657, Japan
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15
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Abstract
Electrophysiological studies of the auditory pathway were performed on the mutant hamster 'bt' which is known to have myelin deficiencies in the central nervous system. Auditory brainstem responses (ABRs), electrocochleograms (EcochGs), and cochlear microphonics (CMs) were recorded. ABRs in 'bt' demonstrated markedly transformed waveforms with significantly prolonged latencies. EcochG in 'bt' showed significantly prolonged N1 latencies of the compound action potentials (CAPs) while 'bt' showed normal CMs. The myelin deficient mutant hamster 'bt' may have myelin deficiencies not only in the brainstem auditory pathway but also in the cochlear nerve.
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Affiliation(s)
- R Naito
- Department of Otolaryngology, University of Tokyo, Hongo 7-3-1, Bunkyo-Ku, Tokyo, Japan.
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Miyazawa T, Ikeda Y, Nakamura K, Naito R, Mochizuki M, Tohya Y, Vu D, Mikami T, Takahashi E. Isolation of feline parvovirus from peripheral blood mononuclear cells of cats in northern Vietnam. Microbiol Immunol 1999; 43:609-12. [PMID: 10480557 DOI: 10.1111/j.1348-0421.1999.tb02447.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Feline parvovirus (FPV) was isolated rather frequently from the peripheral blood mononuclear cells (PBMCs) of cats in northern Vietnam by coculturing with MYA-1 cells (an interleukin-2-dependent feline T lymphoblastoid cell line) or Crandell feline kidney (CRFK) cells (a feline renal cell line). Efficiency of virus isolation was higher in MYA-1 cells than in CRFK cells. Interestingly, among the 17 cats from which FPV was isolated, 9 cats were positive for virus neutralizing (VN) antibody against FPV, indicating that FPV infected PBMCs and was not eliminated from PBMCs even in the presence of VN antibodies in the cats.
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Affiliation(s)
- T Miyazawa
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan.
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17
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Igarashi S, Kimura T, Naito R, Hara H, Fujii M, Koutoku H, Oritani H, Mase T. A novel class of inhibitors for human steroid 5 alpha-reductase: phenoxybenzoic acid derivatives. I. Chem Pharm Bull (Tokyo) 1999; 47:1073-80. [PMID: 10478462 DOI: 10.1248/cpb.47.1073] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In a search for novel nonsteroidal inhibitors of human prostatic 5 alpha-reductase, we found a new series of phenoxybenzoic acid derivatives to be potent human prostatic 5 alpha-reductase inhibitors. Among them, 4-(biphenyl-4-yloxy)benzoic acid derivatives (2n, YM-31758), 2o and 2s showed more potent inhibitory activities than finasteride with IC50 values of 0.87, 0.67 and 0.56 nM, respectively. The optimized structures for the phenoxybenzoic acid derivatives 2d-2i were calculated by molecular modeling analysis, and the favorable distance between the carbon of the carboxyl group and the centroid of the phenyl group (benzene ring C) was found to be in the 9-11 A range.
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Affiliation(s)
- S Igarashi
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., Ibaraki, Japan
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18
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Ikeda Y, Miyazawa T, Nakamura K, Naito R, Inoshima Y, Tung KC, Lee WM, Chen MC, Kuo TF, Lin JA, Mikami T. Serosurvey for selected virus infections of wild carnivores in Taiwan and Vietnam. J Wildl Dis 1999; 35:578-81. [PMID: 10479095 DOI: 10.7589/0090-3558-35.3.578] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Serum samples from two leopard cats (Felis bengalensis) and four Formosan gem-faced civets (Paguma larvata taivana) in Taiwan, September 1995, and nine leopard cats in Vietnam, August and December 1997, were examined for the prevalence of antibodies against feline parvovirus, feline herpesvirus type 1, feline calicivirus and feline immunodeficiency virus. All civets and nine of 11 leopard cats were shown to have antibodies against feline parvovirus (FPV), and FPV's were isolated from mononuclear cells in the peripheral blood of the six leopard cats.
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Affiliation(s)
- Y Ikeda
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
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19
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Naito R, Hayashida T, Mochizuki M, Kojima H, Kaga K. Auditory brainstem response and neuropathology in a case of systemic T-cell lymphoma with intracranial metastasis. ORL J Otorhinolaryngol Relat Spec 1999; 61:108-12. [PMID: 10095202 DOI: 10.1159/000027651] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A 58-year-old male with systemic T-cell lymphoma involving the brainstem eccentrically, showed varying abnormal auditory brainstem responses (ABRs). The initial ABR demonstrated a prolonged V wave peak latency and an I-V IPL on admission. Four months later, all waves were absent bilaterally. Neuropathological examination at autopsy revealed that most of the nuclei and tracts associated with the auditory system were destroyed by lymphoid cell infiltration. It suggested that in the early stages of this disease, lymphoid cells could have involved the lower brainstem and, subsequently, in the advanced stages invaded the inferior colliculus.
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Affiliation(s)
- R Naito
- Department of Otolaryngology, Faculty of Medicine, University of Tokyo, Tokyo, Japan.
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20
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Naito R, Takeuchi M, Morihira K, Hayakawa M, Ikeda K, Shibanuma T, Isomura Y. Selective muscarinic antagonists. I. Synthesis and antimuscarinic properties of 4-piperidyl benzhydrylcarbamate derivatives. Chem Pharm Bull (Tokyo) 1998; 46:1274-85. [PMID: 9734315 DOI: 10.1248/cpb.46.1274] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of 1-substituted-4-piperidyl benzhydrylcarbamate derivatives were synthesized and evaluated for binding affinity to M1, M2 and M3 receptors, and for antimuscarinic activities. Receptor binding assays indicated that 1-benzyl-4-piperidyl benzhydrylcarbamate derivatives showed higher affinities for M1 and M3 receptors, and good selectivities for M3 over M2 receptor, than the corresponding ester analog. These results indicate that the urethane bond is a novel linker for muscarinic antagonists, and serves to lock the molecular conformation and allows the hydrophobic portion and cationic site of the molecule to bind to M1 and M3 muscarinic receptors. Among the prepared compounds, 1-(4-methylaminobenzyl)-4-piperidyl benzhydrylcarbamate monohydrochloride (18b, YM-58790) exhibited potent inhibitory activity on bladder pressure in reflexly-evoked rhythmic contraction, comparable to oxybutynin and was approximately ten times less inhibitory on oxotremorine-induced salivary secretion than oxybutynin in rats. Further evaluation of antimuscarinic effects on bradycardia and pressor in pithed rats, and on tremor in mice, demonstrated that YM-58790 can be useful for treatment of urinary urge incontinence as a bladder-selective M3 antagonist with fewer side effects.
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Affiliation(s)
- R Naito
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., Ibaraki, Japan
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21
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Ikeda Y, Miyazawa T, Kurosawa K, Naito R, Hatama S, Kai C, Mikami T. New quantitative methods for detection of feline parvovirus (FPV) and virus neutralizing antibody against FPV using a feline T lymphoid cell line. J Vet Med Sci 1998; 60:973-4. [PMID: 9764414 DOI: 10.1292/jvms.60.973] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Previously, we reported that a feline T lymphoid cell line, FL74 cells, was very sensitive to feline parvovirus (FPV) infection. In the present study, we developed new quantitative methods for detection of FPV and virus neutralizing antibody against FPV using FL74 cells. The methods presented here were very simple and applicable to both canine parvovirus and feline panleukopenia virus.
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Affiliation(s)
- Y Ikeda
- Department of Veterinary Microbiology, Graduate School of Agricultural and Life Sciences, University of Tokyo, Japan
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22
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Naito R, Takeuchi M, Morihira K, Hayakawa M, Ikeda K, Shibanuma T, Isomura Y. Selective muscarinic antagonists. II. Synthesis and antimuscarinic properties of biphenylylcarbamate derivatives. Chem Pharm Bull (Tokyo) 1998; 46:1286-94. [PMID: 9734316 DOI: 10.1248/cpb.46.1286] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel series of biphenylylcarbamate derivatives were synthesized and evaluated for binding to M1, M2 and M3 receptors and for antimuscarinic activities. Receptor binding assays indicated that biphenyl-2-ylcarbamate derivatives had high affinities for M1 and M3 receptors and good selectivities for M3 receptor over M2 receptor, indicating that the biphenyl-2-yl group is a novel hydrophobic replacement for the benzhydryl group in the muscarinic antagonist field. In this series, quinuclidin-4-yl biphenyl-2-ylcarbamate monohydrochloride (8l, YM-46303) exhibited the highest affinities for M1 and M3 receptors, and selectivity for M3 over M2 receptor. Compared to oxybutynin, YM-46303 showed approximately ten times higher inhibitory activity on bladder pressure in reflexly-evoked rhythmic contraction, and about 5-fold greater selectivity for urinary bladder contraction against salivary secretion in rats. Moreover, selective antagonistic activity was also observed in vitro. Further evaluation of antimuscarinic effects on bradycardia and pressor in pithed rats, and on tremor in mice, showed that YM-46303 can be useful for the treatment of urinary urge incontinence as a bladder-selective M3 antagonist with potent activities and fewer side effects.
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Affiliation(s)
- R Naito
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Co., Ltd., Ibaraki, Japan
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23
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Yasunaga T, Kimura T, Naito R, Kontani T, Wanibuchi F, Yamashita H, Nomura T, Tsukamoto S, Yamaguchi T, Mase T. Synthesis and pharmacological characterization of novel 6-fluorochroman derivatives as potential 5-HT1A receptor antagonists. J Med Chem 1998; 41:2765-78. [PMID: 9667967 DOI: 10.1021/jm9707840] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A series of novel 6-fluorochroman derivatives was prepared and evaluated as antagonists for the 5-HT1A receptor. N-2-[[(6-Fluorochroman-8-yl)oxy]ethyl]-4-(4-methoxyphenyl)butylami ne (3; J. Med. Chem. 1997, 40, 1252-1257) was chosen as a lead, and structural modifications were done on the aliphatic portion of the chroman ring, the tether linking the middle amine and the terminal aromatic ring, the aromatic ring, and lastly the amine. Radioligand binding assays proved that the majority of the novel compounds behaved as good to excellent ligands at the 5-HT1A receptor, some of which were selective with respect to alpha1-adrenergic and D2-dopaminergic receptors. The antagonist activity of the compounds was assessed in the forskolin-stimulated adenylate cyclase assays in CHO cells expressing the human 5-HT1A receptors. Among the modifications attempted, introduction of an oxo or an optically active hydroxy moiety at the chroman C-4 position was effective in ameliorating the receptor selectivity. Six analogues were selected through the in vitro screens and further evaluated for their in vivo activities. A 4-oxochroman derivative (31n), having a terminal 1, 3-benzodioxole ring, demonstrated antagonist activities toward 8-OH-DPAT-induced behavioral and electrophysiological responses in rats.
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Affiliation(s)
- T Yasunaga
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Company, Ltd., 21 Miyukigaoka, Tsukuba, Ibaraki 305-8585, Japan
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24
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Nakahara H, Takeuchi M, Naito R, Kurihara H, Nagano N, Isomura Y, Mase T. Absolute Configuration of (+)-1-Phenyl-1,2,3,4-tetrahydroisoquinoline Hydrochloride. Acta Crystallogr C 1998. [DOI: 10.1107/s0108270197018581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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25
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Yasunaga T, Naito R, Kontani T, Tsukamoto S, Nomura T, Yamaguchi T, Mase T. N-[2-[(substituted chroman-8-yl)oxy]ethyl]-4-(4-methoxyphenyl)butylamines: synthesis and wide range of antagonism at the human 5-HT1A receptor. J Med Chem 1997; 40:1252-7. [PMID: 9111299 DOI: 10.1021/jm960760d] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A series of N-[2-[(substituted chroman-8-yl)oxy]ethyl]-4-(4-methoxyphenyl)butylamines was prepared and examined for their 5-HT1A receptor antagonist activity. The parent compound 3a and seven analogs bearing five kinds of substituents on the chroman ring were prepared from the corresponding 8-hydroxychroman intermediates. Radioligand binding assays proved the compounds 3a-h to have high affinity for the rat hippocampal 5-HT1A receptor with varied selectivity for adrenaline alpha1 and dopamine D2 receptors. Their antagonism was evaluated in a forskolin-stimulated adenylate cyclase assay performed with CHO cells expressing the human 5-HT1A receptor. Among the series, the C6-fluoro analog 3c showed both extremely potent affinity (Ki = 0.22 nM) and antagonism (EC50 = 13 nM) for the 5-HT1A receptor. Correlation analysis using substituent descriptors revealed a linear and negative correlation between molar refractivity of the C6-substituent and the binding affinity expressed in pKi.
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Affiliation(s)
- T Yasunaga
- Institute for Drug Discovery Research, Yamanouchi Pharmaceutical Company, Ltd., Tsukuba, Ibaraki, Japan
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26
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Kanematsu K, Naito R, Shimohigashi Y, Ohno M, Ogasawara T, Kurono M, Yagi K. Design and synthesis of an opioid receptor probe: mode of binding of S-activated (-)-6 beta-sulfhydryldihydromorphine with the SH group in the mu-opioid receptor. Chem Pharm Bull (Tokyo) 1990; 38:1438-40. [PMID: 1975519 DOI: 10.1248/cpb.38.1438] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- K Kanematsu
- Institute of Synthetic Organic Chemistry, Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
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27
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Ninomiya T, Naito R, Okada Y, Kobayashi K, Mori M, Tsukitani K. Immunohistochemical localization of the alpha and beta subunits of S-100 protein in pleomorphic adenoma of the salivary glands. Virchows Arch B Cell Pathol Incl Mol Pathol 1989; 57:63-75. [PMID: 2567551 DOI: 10.1007/bf02899066] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The immunohistochemical expression of the alpha and beta subunits of S-100 protein in reactive, modified and transformed of myoepithelial cells, salivary pleomorphic was investigated using monoclonal antibodies. With S-100 alpha, normal salivary glands showed strong staining in serous acinar cells and moderate to slight staining in ductal segments, and with S-100 beta staining was slight or negative in acinar cells, but strong in nerve fibres. In pleomorphic salivary adenomas, the immunohistochemical distribution of S-100 alpha and beta proteins indicated great variation in the tumour cells. Some neoplastic cells gave similar staining for both S-100 alpha and beta, others were strongly positive for S-100 alpha and stained only slightly for S-100 beta, or vice versa. Yet other cells were positive for S-100 alpha and negative for S-100 beta, or vice versa. Pleomorphic salivary adenomas were classified both by histopathological criteria and by their staining pattern for S-100 alpha and beta proteins. Great heterogeneity in S-100 alpha and beta protein expression was found in individual tumour cells of both ductal and myoepithelial origin, and no regular pattern was identified. The cellular origin of salivary pleomorphic adenomas is discussed in terms of S-100 alpha and beta protein immunohistochemistry. Pleomorphic adenoma cells may be transformed from reserve cells into tumour cells displaying biologic properties of myoepithelial cells, ductal cells, or a mixture of both.
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Affiliation(s)
- T Ninomiya
- Department of Oral Surgery, Asahi University School of Dentistry, Gifu, Japan
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28
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Mori M, Naito R, Tsukitani K, Okada Y, Hayashi T, Kato K. Immunohistochemical distribution of human epidermal growth factor in salivary gland tumours. Virchows Arch A Pathol Anat Histopathol 1987; 411:499-507. [PMID: 2823456 DOI: 10.1007/bf00713280] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Immunohistochemical identification of human epidermal growth factor (hEGF) was carried out in a total of 152 cases of salivary gland tumours, consisting 107 pleomorphic adenomas and their variants, 13 adenolymphomas and 32 adenoid cystic carcinomas. A high percentage of pleomorphic adenomas revealed markedly positive hEGF staining of the luminal surface cells of tubuloductal structures and of modified or neoplastic myoepithelial cells. Clear cells of the tumour showed various reactivities from very slight to strong. Eosinophilic epithelial cells of adenolymphoma gave a positive reaction for hEGF in all the cases, whereas most adenoid cystic adenoma lacked hEGF staining; however some cases showed positive staining of the tumour cells. The immunohistochemical detection of hEGF in most salivary gland tumours suggests this factor to be a possible new marker of salivary glands tumours, and to have a biological role in tumour proliferation.
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Affiliation(s)
- M Mori
- Department of Oral Surgery, Asahi University School of Dentistry, Gifu, Japan
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29
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Mori M, Takai Y, Naito R, Hosaka M, Murase N. Immunohistochemical demonstration of epidermal growth factor and nerve growth factor in experimental carcinogenesis in the mouse submandibular gland. Virchows Arch B Cell Pathol Incl Mol Pathol 1984; 45:431-41. [PMID: 6145250 DOI: 10.1007/bf02889884] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Immunohistochemical demonstration of epidermal growth factor (EGF) and nerve growth factor (NGF) was made during chemical carcinogenesis in the mouse submandibular gland. The granular convoluted tubule cells in the normal male submandibular gland contained larger amounts of EGF and NGF than in the female. The initial phase and early stages in chemical carcinogenesis showed degranulation of the granular convoluted tubule cells with a marked decrease in EGF and NGF. Premalignant lesions such as duct-like structures and multicystic lesions showed variable staining for EGF and were usually negative for NGF. Material secreted into the luminal spaces revealed increased staining for EGF and NGF. Scattered tumor cells of the poorly differentiated squamous-cell carcinoma type and desquamated tumor cells contained abundant EGF, but not NGF. No positive reaction for EGF or NGF was found in the induced squamous-cell carcinoma cells.
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Abstract
After the experimental and phase one studies of our so-called "artificial blood," Fluosol-DA (20%), an emulsified mixture of perfluorodecalin and perfluorotripropylamine, were successfully completed, phase two and three clinical studies were carried out on 186 patients in Japan. The initial dose was 20 ml/Kg body weight (BW), and additional 10 ml/Kg BW doses were applied as needed. Oxygen-supplying and plasma-extending effects were established. No untoward reaction was observed in any of the 186 cases except in a case that involved long-term repeated administration. Initial studies on FLuosol-DA suggest reasonable safety; however, additional clinical trials appear warranted.
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31
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Yokoyama K, Yamanouchi K, Watanabe M, Matsumoto T, Murashima R, Daimoto T, Hamano T, Okamoto H, Suyama T, Watanabe R, Naito R. Preparation of perfluorodecalin emulsion, an approach to the red cells substitute. Fed Proc 1975; 34:1478-83. [PMID: 1126445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The major problems unsolved in fluorocarbon emulsions have been the long lasting retention of the substance in tissues of organs and acute shock symptom in animals receiving "coarse" emulsion with particles larger then 0.2 mum. This report offers a new, stable and sterile preparation of 25% "fine" perfluorodecalin emulsion with yolk phospholipid that is eliminated from liver, spleen and other organs within a few weeks, and whose acute and subacute toxicity is as low as perfluorotributylamine/Pluronic F68 emulsion. Effects of the perfluorodecalin emulsion thus prepared for maintaining contractile force of isolated guinea pig heart by perfusion and survival of animals receiving repeated circulatory exchange proved similar to perfluorotributylamine/Pluronic F68 emulsion.
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32
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Yokoyama K, Suzuki A, Utsumi I, Naito R. Determination of particle size distribution of fluorocarbon emulsion by means of centrifugal sedimentation--a proposal for specifying the particle size distribution. Chem Pharm Bull (Tokyo) 1974; 22:2966-71. [PMID: 4468117 DOI: 10.1248/cpb.22.2966] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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33
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Naito R. V. Experiences in the Development of Plasma Derivatives in Japan. Vox Sang 1972. [DOI: 10.1111/j.1423-0410.1972.tb03807.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Naito R. Experiences in the development of plasma derivatives in Japan. Vox Sang 1972; 23:35-7. [PMID: 4117047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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35
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Naito R. [Freezing and freeze-drying of plasma derivatives]. Saishin Igaku 1972; 27:627-31. [PMID: 5026626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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36
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Naito R. Experiences in the Development of Plasma Derivatives
in Japan. Vox Sang 1972. [DOI: 10.1159/000466515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Affiliation(s)
- F Hayashi
- Department of Biochemistry, Michigan State University, East Lansing, Michigan 48823
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