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Nakayama E, Tohara H, Sakai K, Hayata M, Ohnishi S, Sekino J, Tsuzuki H, Hirai T, Hayashi A, Ueda K. Predictive Factors Associated with Oral Intake Ability in Gastrostomy Patients Under Long-Term Care. J Nutr Health Aging 2017; 21:715-720. [PMID: 28537338 DOI: 10.1007/s12603-016-0796-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine the physical indicators associated with oral intake status and swallowing function in gastrostomy patients under long-term care. DESIGN Cross-sectional study. SETTING Thirty-one hospitals that perform gastrostomy insertion, replacement and management. PARTICIPANTS A total of 117 respondents from 31 hospitals in Japan underwent gastrostomy tube replacement and management between September 2012 and January 2014. Each participant underwent a gastrostomy at least 6 months prior to the study, and received long-term care either at home, a care facility, or a hospital. MEASUREMENTS We conducted a questionnaire survey at Japanese hospitals and used the data obtained from 117 respondents for analysis. The survey was conducted using a questionnaire form that collected information about the following items: oral intake status, sex, age, disease history, number of days elapsed since gastrostomy, residence status, modified Rankin Scale score, consciousness, oral hygiene status, articulation and phonation, voluntary saliva swallow, Modified Water Swallow Test, and Food Test. RESULTS Results revealed significant differences in modified Rankin Scale scores, sputum production, articulation and phonation, and voluntary saliva swallowing between patients who were orally fed and those who were not. Moreover, sputum production and voluntary saliva swallowing were strongly associated with oral intake status. Finally, sputum production, articulation and phonation, and voluntary saliva swallowing were strongly associated with swallowing function test results. CONCLUSION Results from this study suggested that sputum production, articulation and phonation, and voluntary saliva swallowing could be used as indicators for estimating oral intake status and swallowing function in gastrostomy patients under long-term care.
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Affiliation(s)
- E Nakayama
- Enri Nakayama, Nihon University School of Dentistry, Japan,
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2
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Yamane Y, Sakai H, Kurimoto F, Sudo J, Tsuzuki H, Takahashi S, Hosomi Y, Tanai C, Yoh K, Goto Y, Ohashi Y, Kunitoh H. Observational Study of Treatment with Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitors (Egfr-Tki) in Activating Egfr Mutation-Positive (Egfrm+) Advanced or Recurrent Non-Small-Cell Lung Cancer (Nsclc) After Radiological Progression to First-Line Therapy with Egfr-Tki. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.69] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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3
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Horinouchi H, Kubota K, Miyanaga A, Minegishi Y, Takeuchi S, Nakamichi S, Gemma A, Kurimoto F, Sudo J, Yamane Y, Tsuzuki H, Sakai H, Utsumi H, Sunami K, Mizugaki H, Kanda S, Fujiwara Y, Nokihara H, Yamamoto N, Tamura T. Oral Hydration As a Post-Hydration Method for Cisplatin (Cddp) Administration in Patients with Lung Cancer: a Prospective Multicenter Trial. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu356.40] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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4
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Kinoshita Y, Matsuo M, Todoki K, Ozono S, Fukuoka S, Tsuzuki H, Nakamura M, Tomihata K, Shimamoto T, Ikada Y. Alveolar bone regeneration using absorbable poly(L-lactide-co-ɛ-caprolactone)/β-tricalcium phosphate membrane and gelatin sponge incorporating basic fibroblast growth factor. Int J Oral Maxillofac Surg 2008; 37:275-81. [DOI: 10.1016/j.ijom.2007.11.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2007] [Revised: 08/06/2007] [Accepted: 11/22/2007] [Indexed: 11/28/2022]
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5
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Sasaki K, Harada K, Saito N, Tsutsui T, Nakanishi S, Tsuzuki H, Koizumi A. Impact of airborne perfluorooctane sulfonate on the human body burden and the ecological system. Bull Environ Contam Toxicol 2003; 71:408-413. [PMID: 14560396 DOI: 10.1007/s00128-003-0179-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- K Sasaki
- Research Institute for Environmental Sciences and Public Health of Iwate Prefecture, Morioka Iwate, Japan
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6
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Choi KC, Shrestha YB, Roh SG, Hishikawa D, Kuno M, Tsuzuki H, Hong YH, Sasaki S. The Role of Phosphatidylinositol 3-kinase and Mitogenic Activated Protein Kinase on the Differentiation of Ovine Preadipocytes. Asian Australas J Anim Sci 2003. [DOI: 10.5713/ajas.2003.1199] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Yagami T, Ueda K, Asakura K, Sakaeda T, Nakazato H, Kuroda T, Hata S, Sakaguchi G, Itoh N, Nakano T, Kambayashi Y, Tsuzuki H. Gas6 rescues cortical neurons from amyloid beta protein-induced apoptosis. Neuropharmacology 2002; 43:1289-96. [PMID: 12527478 DOI: 10.1016/s0028-3908(02)00333-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [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: 12/15/2022]
Abstract
Gas6, a product of the growth-arrest-specific gene 6, protects neurons from serum deprivation-induced apoptosis. Neuronal apoptosis is also caused by amyloid beta protein (Abeta), whose accumulation in the brain is a characteristic feature of Alzheimer's disease. Abeta induces Ca(2+) influx via L-type voltage-dependent calcium channels (L-VSCCs), leading to its neurotoxicity. In the present study, we investigated effects of Gas6 on Abeta-induced cell death in primary cultures of rat cortical neurons. Abeta caused neuronal cell death in a concentration- and time-dependent manner. Gas6 significantly prevented neurons from Abeta-induced cell death. Gas6 ameliorated Abeta-induced apoptotic features such as the condensation of chromatin and the fragmentation of DNA. Prior to cell death, Abeta increased influx of Ca(2+) into neurons through L-VSCCs. Gas6 significantly inhibited the Abeta-induced Ca(2+) influx. The inhibitor of L-VSCCs also suppressed Abeta-induced neuronal cell death. The present cortical cultures contained few non-neuronal cells, indicating that Gas6 affected the survival of neurons directly, but not indirectly via non-neuronal cells. In conclusion, we demonstrate that Gas6 rescues cortical neurons from Abeta-induced apoptosis. Furthermore, the present study indicates that inhibition of L-VSCC contributes to the neuroprotective effect of Gas6.
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Affiliation(s)
- T Yagami
- Discovery Research Laboratories, Shionogi and Co., Ltd., 12-4 Sagisu 5-Chome, Fukushima-ku, 553-0002, Osaka, Japan.
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8
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Ito T, Fujieda S, Tsuzuki H, Sunaga H, Fukuda M, Saito H. Appearance of bax protein after preoperative chemoradiotherapy is a prognostic factor in maxillary cancer. Acta Otolaryngol 2001; 121:967-72. [PMID: 11813905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The prognosis for maxillary squamous cell carcinoma (SCC) remains poor, despite advances in combination therapy. Combined treatment with anticancer drugs and radiation therapy is aimed at inducing apoptosis. As apoptosis is regulated by several proteins, we investigated the expression of p53, Bax and Bcl-2 in maxillary SCC before treatment and after preoperative chemoradiotherapy using an immunohistochemical approach. Furthermore, apoptotic cells were visualized using an in situ apoptosis detection kit and the apoptosis index (AI) was defined as the number of positive cancer cells per 1,000 cancer cells. Expression of p53 and Bcl-2 and the Al in 23 maxillary SCCs were not associated with tumor size, lymph node metastasis, clinical stage, frequency of recurrence or 5-year survival rate either before treatment or after preoperative chemoradiotherapy. Bax expression before treatment was not correlated with any clinicopathological factors before treatment. However, no patients in the Bax-positive group (11/22 cases) after preoperative chemoradiotherapy had recurrence of maxillary SCC and all were alive after 5 years, while the 5-year survival rate was 34.1% in Bax-negative patients. These results suggest that the appearance of the Bax protein after preoperative chemoradiotherapy is a significant prognostic marker for maxillary SCC.
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Affiliation(s)
- T Ito
- Department of Otorhinolaryngology, Fukui Medical University, Japan
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9
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Endo Y, Tsuzuki H, Fujino M, Tabata T, Oka H, Shimizu T, Hanasawa K, Tani T. Off-line leukapheresis using leukofiltration for active ulcerative colitis: a case report. Ther Apher 2001; 5:480-3. [PMID: 11800085 DOI: 10.1046/j.1526-0968.2001.00385.x] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The method of leukocytapheresis for ulcerative colitis (UC) by using extracorporeal circulation (on-line system) has been reported. To perform leukocytapheresis, we have applied leukocyte elimination filters for blood transfusion to leukocytapheresis without using extracorporeal circulation (off-line leukocytapheresis system). Four hundred milliliters of peripheral blood was collected and reinfused through a leukocyte elimination filter. This procedure was repeated 5 times, and up to 2,000 ml of peripheral blood was treated. This method has been applied once a week for 5 weeks. We applied the off-line leukapheresis system to a 31-year-old male ulcerative colitis patient. As a result, the frequency of defecation and the dose of medicine were effectively decreased, and endoscopic finding was also improved. Because of the absence of complications observed with the on-line system, the off-line leukocytapheresis system that we have applied to the clinical patient is simple, safe, and useful.
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Affiliation(s)
- Y Endo
- 1st Department of Surgery, Shiga University of Medical Science, Otsu, Japan.
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10
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Yamashita T, Ito M, Tsuzuki H, Sakae K. Identification of Aichi virus infection by measurement of immunoglobulin responses in an enzyme-linked immunosorbent assay. J Clin Microbiol 2001; 39:4178-80. [PMID: 11682554 PMCID: PMC88511 DOI: 10.1128/jcm.39.11.4178-4180.2001] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [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: 11/20/2022] Open
Abstract
Using inhibitory enzyme-linked immunosorbent assay, seroconversions to Aichi virus were detected in 24 (42.9%) of 56 patients with gastroenteritis in six outbreaks. Virus-specific immunoglobulin M (IgM) was detected in convalescent-phase sera from 7 of 24 patients. Of the other 17 patients, 12 developed a significant increase in both IgA and IgG levels and 5 developed a significant increase in IgG alone.
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Affiliation(s)
- T Yamashita
- Department of Microbiology, Aichi Prefectural Institute of Public Health, Nagare 7-6, Tsuji-machi, Kita-ku, Nagoya 462-8576, Japan.
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11
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Tsuzuki H, Tani T, Ueyama H, Kodama M. Lipopolysaccharide: neutralization by polymyxin B shuts down the signaling pathway of nuclear factor kappaB in peripheral blood mononuclear cells, even during activation. J Surg Res 2001; 100:127-34. [PMID: 11516215 DOI: 10.1006/jsre.2001.6227] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [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
BACKGROUND There have been many studies on anti-lipopolysaccharide (LPS) agents and LPS-neutralizing agents; however, there have been no reports on the changes in clinical status and mediators that occur when these agents are used. Polymyxin (PMX) (treatment using a column containing polymyxin B-immobilized fiber) removed circulating endotoxin, and reduced various cytokines within 120 min, even in patients with high levels of plasma cytokines. Our purpose was examine the mechanisms of PMX treatment by which plasma cytokines are reduced by endotoxin neutralization with polymyxin B, even during therapy for sepsis and/or endotoxin shock. METHODS We studied the interaction between nuclear factor kappaB (NF-kappaB) binding activity and tumor necrosis factor alpha (TNF-alpha) secretion in an experimental system using LPS-stimulated human peripheral blood mononuclear cells (PBMCs), after neutralization of LPS with polymyxin B. PBMCs were incubated with LPS in vitro, and TNF-alpha secretion and NF-kappaB activation were assessed. We then studied the changes in NF-kappaB activation and TNF-alpha secretion when both polymyxin B and LPS were added simultaneously and when polymyxin B was added after 30 or 120 min of incubation with LPS. RESULTS Immediate inhibition of NF-kappaB binding activity and suppression of TNF-alpha secretion were observed after LPS neutralization with polymyxin B regardless of whether PBMCs were already producing TNF-alpha. CONCLUSIONS These findings may indicate one of the mechanisms operating in the clinical changes that occur after circulating endotoxin removal, and are likely to have therapeutic value, even for patients with high proinflammatory cytokine levels.
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Affiliation(s)
- H Tsuzuki
- First Department of Surgery, Shiga University of Medical Science, Seta-tsukinowa-cho, Otsu-city, Shiga, 520-2192, Japan.
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12
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Sunaga H, Fujieda S, Tsuzuki H, Asamoto K, Fukuda M, Saito H. Expression of granulocyte colony-stimulating factor receptor and platelet-derived endothelial cell growth factor in oral and oropharyngeal precancerous lesions. Anticancer Res 2001; 21:2901-6. [PMID: 11712784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Epithelial hyperplasia and dysplasia have been diagnosed as precancerous lesions and have been discussed in relationship to carcinogenesis. We analyzed the immunohistochemical expression of granulocyte colony-stimulating factor receptor (G-CSFR) and platelet-derived endothelial cell growth factor (PD-ECGF) in oral and oropharynx; 33 samples of normal epithelium, 28 samples of hyperplasia, 16 samples of dysplasia and 58 samples of squamous cell carcinoma. Also, we examined mean vessel density (MVD) by using CD34 staining and proliferating cell nuclear antigen (PCNA) staining. Dysplasia and head and neck Squamous Cell Carcinoma (SCC) exhibited higher G-CSFR expression and MVD than normal or hyperplastic epithelium (p <0.01). In the PD-ECGF staining, significant differences were found between SCC and normal epithelium, hyperplasia and dysplasia (p<0.001). In dysplasia and hyperplasia, PD-ECGF expression was significantly correlated with PCNA expression (r=0.345, p=0.025), however it was not correlated with the MVD. G-CSFR expression was not correlated with either PCNA or MVD. These results suggest that G-CSFR and PD-ECGF might be concerned with different carcinogenesis pathways of the squamous cells in the oral region and that PD-ECGF may be concerned with epithelial proliferation rather than angiogenesis.
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Affiliation(s)
- H Sunaga
- Department of Otorhinolaryngology, Fukui Medical University, Japan
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13
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Maekawa R, Maki H, Wada T, Yoshida H, Nishida-Nishimoto K, Okamoto H, Matsumoto Y, Tsuzuki H, Yoshioka T. Anti-metastatic efficacy and safety of MMI-166, a selective matrix metalloproteinase inhibitor. Clin Exp Metastasis 2001; 18:61-6. [PMID: 11206840 DOI: 10.1023/a:1026553414492] [Citation(s) in RCA: 20] [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: 11/12/2022]
Abstract
The anti-metastatic efficacy and safety of a newly-developed matrix metalloproteinase (MMP) inhibitor were examined. MMI-166, a N-sulfonylamino acid derivative, inhibited the enzyme activity of MMP-2, 9, and 14 but not MMP-1, 3 or 7. Daily oral administration of MMI-166 resulted in potent inhibition of metastatic lung colonization of Lewis lung carcinoma injected via the tail vein and liver metastasis of C-1H human colon cancer implanted into the spleen at inhibition levels of 43% and 63%, respectively. Daily administration of MMI-166 also resulted in prolonged survival of mice given intraperitoneal implantation of Ma44 human lung cancer cells. The anti-metastatic activity of MMI-166 was as effective as that of other MMP inhibitors with broad inhibitory spectrum. MMI-166 did not affect in vitro tumor cell growth. Neither body weight losses nor hematotoxicity was observed during long-term treatment, indicating the safety of MMI-166 in mice. These results indicate that the selective MMP inhibitor MMI-166 has therapeutic potential as an anti-metastasis agent.
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Affiliation(s)
- R Maekawa
- Shionogi Research Laboratories, Shionogi & Co., Ltd, Osaka, Japan
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14
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Fujieda S, Sunaga H, Tsuzuki H, Fan GK, Ito T, Sugimoto C, Saito H. Expression of fas (CD95) ligand is correlated with IL-10 and granulocyte colony-stimulating factor expression in oral and oropharyngeal squamous cell carcinoma. Cancer Lett 2000; 161:73-81. [PMID: 11078915 DOI: 10.1016/s0304-3835(00)00599-1] [Citation(s) in RCA: 10] [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: 11/19/2022]
Abstract
The Fas/Fas ligand (FasL) pathway has been shown to be an important cellular pathway mediating apoptosis. In this study we investigated the expression of Fas and FasL and the rate of spontaneous apoptosis in 58 oral and oropharyngeal squamous cell carcinoma (SCC) by using immunohistochemical techniques. There was no correlation between Fas or FasL expression and clinicopathological factors. The expression of Fas in the tumor did not affect spontaneous apoptosis of the tumor cells. However, FasL expression was associated with IL-10 and granulocyte colony-stimulating factor expression in oral and oropharyngeal SCC. These results suggested that the Fas/FasL system is connected with the expression of various factors including cytokines in tumor cells.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Shimoaizuki, Matsuoka, Yoshida, 910-1193, Fukui, Japan.
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Yamashita T, Sugiyama M, Tsuzuki H, Sakae K, Suzuki Y, Miyazaki Y. Application of a reverse transcription-PCR for identification and differentiation of Aichi virus, a new member of the Picornavirus family associated with gastroenteritis in humans. J Clin Microbiol 2000; 38:2955-61. [PMID: 10921958 PMCID: PMC87158 DOI: 10.1128/jcm.38.8.2955-2961.2000] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2000] [Accepted: 06/07/2000] [Indexed: 11/20/2022] Open
Abstract
Aichi viruses isolated in Vero cells from seven patients in five gastroenteritis outbreaks in Japan, five Japanese returning from Southeast Asian countries, and five local children in Pakistan with gastroenteritis were examined for differentiation based on their reactivities with a monoclonal antibody to a standard strain (A846/88) and a reverse transcription-PCR (RT-PCR) of three genomic regions. The RNA sequences were determined for 519 bases of these 17 isolates at the putative junction between the C terminus of 3C and the N terminus of 3D. The analyses revealed an approximately 90% homology between these isolates, which were then divided into two groups: group 1 (genotype A) included six isolates from four outbreaks and one isolate from a traveler and group 2 (genotype B) included one isolate from the other outbreak, four isolates from returning travelers, and all of the isolates from the Pakistani children. Based on the isolate sequences, a primer pair and a biotin-labeled probe were designed for amplification and detection of 223 bases at the 3C-3D junction of Aichi virus RNA in fecal specimens. The Aichi virus RNA was detected in 54 (55%) of 99 fecal specimens from the patients in 12 (32%) of 37 outbreaks of gastroenteritis in Japan. Of the 12 outbreaks, 11 were suspected to be due to genotype A. These results indicated that RT-PCR can be a useful tool to detect Aichi virus in stool samples and that a sequence analysis of PCR products can be employed to identify the prevalent strain in each incident.
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Affiliation(s)
- T Yamashita
- Department of Microbiology, Aichi Prefectural Institute of Public Health, 7-6, Nagare, Tsujimachi, Kita-ku, Nagoya, Aichi 462-8576, Japan.
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Takeyama H, Tsuzuki H, Chow S, Nakayama H, Matsunaga T. Discrimination between Atlantic and Pacific Subspecies of Northern Bluefin Tuna (Thunnus thynnus) by Magnetic-Capture Hybridization Using Bacterial Magnetic Particles. Mar Biotechnol (NY) 2000; 2:309-313. [PMID: 10960119 DOI: 10.1007/s10126000010] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The previously developed magnetic-capture hybridization technique employing bacterial magnetic particles was applied to discriminate between Atlantic and Pacific subspecies of the northern bluefin tuna (Thunnus thynnus) using specific DNA sequences. Nucleotide sequences of a 925-bp fragment (ATCO) flanking the mitochondrial ATPase and cytochrome oxidase subunit III genes in these two subspecies were compared. Two regions having single-nucleotide and three-nucleotide differences between the subspecies were adopted to design DNA probes (NR1, 21-mer; NR2, 29-mer), and two internal primer sets were designed to amplify DNA fragments containing these regions. The DNA probes were immobilized on bacterial magnetic particles via streptavidin-biotin conjugation and subjected to magnetic-capture hybridization with the digoxigenin-labeled fragments amplified using the internal primers. The luminescence intensities of DNA on bacterial magnetic particles obtained by hybridization between the probes and the complementary fragments were higher than those obtained by hybridization with noncomplementary fragments. These data suggest that this system employing DNA on bacterial magnetic particles may be useful for discrimination of these two subspecies by recognizing a single-nucleotide difference.
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Affiliation(s)
- H Takeyama
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho 2-24-16, Koganei 184-8588, Japan
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Abstract
We found that pridoxal phosphate (PLP), a coenzyme form of vitamin B6, inhibited the activity of cathepsins B, K, S and L in vitro. Cathepsins activities in cultured splenocytes were suppressed by the addition of pridoxal (PL) or pridoxine (PI) in to the culture medium. A newly synthesized artificial vitamin B6 derivative, a pridoxal propionate derivative, CLIK-164, showed selective inhibition of cathepsin O/K.
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Affiliation(s)
- A Matsui
- Tokushima Bunri University, Institute for Health Sciences, Japan
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Yamashita T, Morishita T, Tsuzuki H, Sakae K, Suzuki Y, Kadosaka T, Kasuya S. [Analysis of prevalent Orientia tsutsugamushi in Aichi Prefecture]. Kansenshogaku Zasshi 1999; 73:1194-8. [PMID: 10655679 DOI: 10.11150/kansenshogakuzasshi1970.73.1194] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Orientia tsutsugamushi was isolated from one of 8 patients' sera in Aichi Prefecture, and was identified to have the same antigenicity with the KN-2 strain (KN-2 like) based on the reactivity with 13 types of strain-specific or cross-reactive monoclonal antibodies to Karp, Gilliam, and Kato strains. Four isolates from 4 unfed larvae and adult of Leptotrombidium pallidum were also classified as the KN-3 like strains. Using indirect immunofluorescence, sera from 20 patients with tsutsugamushi disease were tested for reactivity with KN-1, KN-2, KN-3, and GJ-1 strains, isolated from patients in Gifu Prefecture. Fifteen sera showed the highest titer against KN-2 strain in Immunogloburin M (IgM). Of the other 5, three were higher for KN-3 strain in IgM, and two were KN-1 or GJ-1, respectively. These results suggested that KN-2 like strains were prevalent in the region where the number of patients has been ranked the highest in Aichi Prefecture. KN-1, KN-3, and GJ-1 like strains were also existed in this area. KN-3 like strain was likely to be distributed in another area. Aichi Prefecture.
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Affiliation(s)
- T Yamashita
- Department of Microbiology, Aichi Prefectural Institute of Public Health
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Maki H, Maekawa R, Yoshida H, Hojo K, Uchida N, Wada T, Tanaka H, Takeda Y, Matsumoto M, Yamada H, Nishitani Y, Shono K, Kasai H, Sato S, Okamoto H, Hayashi R, Tamura Y, Tsuzuki H, Watanabe F, Sugita K, Yoshioka T. [Antiangiogenic and antitumor effect of BPHA, an orally-active matrix metalloproteinase inhibitor, in in vivo murine and human tumor model]. Gan To Kagaku Ryoho 1999; 26:1599-606. [PMID: 10553417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
We examined the antiangiogenic and antitumor efficacy of a newly-developed matrix metalloproteinase (MMP) inhibitor, BPHA (N-biphenyl sulfonyl-phenylalanine hydroxiamic acid). BPHA potently inhibits MMP-2, 9 and 14 but not MMP-1, 3 or 7. In contrast, (-)BPHA, an enantiomer of BPHA, was inactive against all MMP tested. Daily oral administration of BPHA in mice resulted in potent inhibition of tumor-induced angiogenesis, primary tumor growth and liver metastasis, whereas (-)BPHA did not. These results demonstrate that selective MMP inhibition is correlated with antiangiogenic and antitumor efficacy and that the selective MMP inhibitor BPHA has therapeutic potential without hematotoxic effect or loss of body weight.
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Affiliation(s)
- H Maki
- Research Laboratories, Shionogi & Co., Ltd
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Katunuma N, Murata E, Kakegawa H, Matsui A, Tsuzuki H, Tsuge H, Turk D, Turk V, Fukushima M, Tada Y, Asao T. Structure based development of novel specific inhibitors for cathepsin L and cathepsin S in vitro and in vivo. FEBS Lett 1999; 458:6-10. [PMID: 10518923 DOI: 10.1016/s0014-5793(99)01107-2] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.8] [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: 11/23/2022]
Abstract
Specific inhibitors for cathepsin L and cathepsin S have been developed with the help of computer-graphic modeling based on the stereo-structure. The common fragment, N-(L-trans-carbamoyloxyrane-2-carbonyl)-phenylalanine-dimethyla mide, is required for specific inhibition of cathepsin L. Seven novel inhibitors of the cathepsin L inhibitor Katunuma (CLIK) specifically inhibited cathepsin L at a concentration of 10(-7) M in vitro, while almost no inhibition of cathepsins B, C, S and K was observed. Four of the CLIKs are stable, and showed highly selective inhibition for hepatic cathepsin L in vivo. One of the CLIK inhibitors contains an aldehyde group, and specifically inhibits cathepsin S at 10(-7) M in vitro.
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Affiliation(s)
- N Katunuma
- Institute for Health Sciences, Tokushima Bunri University, Japan
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21
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Sugimoto C, Fujieda S, Seki M, Sunaga H, Fan GK, Tsuzuki H, Borner C, Saito H, Matsukawa S. Apoptosis-promoting gene (bax) transfer potentiates sensitivity of squamous cell carcinoma to cisplatin in vitro and in vivo. Int J Cancer 1999; 82:860-7. [PMID: 10446454 DOI: 10.1002/(sici)1097-0215(19990909)82:6<860::aid-ijc15>3.0.co;2-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/10/2022]
Abstract
Modulation of apoptosis may potentiate the sensitivity of tumor cells to chemotherapeutic agents, thus improving the clinical outcome of cancer treatment. Bax, an apoptosis-promoting member of the bcl-2 family, may be a key factor influencing the chemosensitivity of tumor cells, however, its involvement in cellular sensitivity to anti-cancer drugs remains uncertain in squamous cell carcinoma (SCC). To investigate the role of bax gene expression in modulating cisplatin (CDDP)-induced apoptosis in vitro, an established CDDP-resistant human head and neck SCC (IMC-3 cell line) was transfected with bax gene-bearing mammalian expression vector. Overexpression of the bax gene in CDDP-resistant IMC-3 cells elevated the CDDP susceptibility of tumor cells to a level similar to that of the parental IMC-3 cells. In an in vivo study, percutaneous transfer of apoptosis-promoting bax gene by particle-mediated (gene gun) delivery caused overexpression of Bax in SCC, which was confirmed by immunohistochemical staining, and inhibited the growth of mouse CDDP-resistant SCC. Furthermore, combination therapy with bax gene transfer and subcutaneous administration of CDDP at 3-day intervals markedly inhibited the growth of mouse SCC. Thus, overexpression of bax in SCC by a gene gun system appears to be a rational approach to improving the efficacy of chemotherapy and treatment outcome. We suggest that exogenous bax expression may have therapeutic applications for enhancing chemotherapy in SCC.
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Affiliation(s)
- C Sugimoto
- Department of Otorhinolaryngology, Fukui Medical University, Fukui, Japan
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22
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Yoshida H, Hong Z, Yoneyama T, Yoshii K, Shimizu H, Ota K, Murakami T, Iritani N, Tsuchiya M, Takao S, Uchida K, Yamanishi S, Hamazaki M, Yoshino S, Oseto M, Abe K, Hamano M, Sakae K, Tsuzuki H, Chiya S, Onishi H, Fujimoto T, Munemura T, Kawamoto A, Miyamura T. Phylogenic analysis of echovirus type 30 isolated from a large epidemic of aseptic meningitis in Japan during 1997-1998. Jpn J Infect Dis 1999; 52:160-3. [PMID: 10592896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
During 1997 to 1998, a nationwide epidemic of aseptic meningitis occurred in Japan. More than 4,500 isolates from patients with aseptic meningitis were identified as echovirus type 30. To investigate the character of these isolates, we examined the nucleotide sequences of thirty-seven geographical representatives and compared them with 50 strains isolated during the past 20 years. The phylogenic analysis used partial sequences from either the VP1 or VP4-VP2 region of the viral capsid. This analysis revealed that the isolates were divided into six genomic groups. All isolates identified during 1997-1998 belonged to only two genomic groups; these two groups are thought to be the causative viral agents involved in the recent epidemic.
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Affiliation(s)
- H Yoshida
- Department of Virology II, National Institute of Infectious Diseases, Tokyo, Japan.
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23
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Fujieda S, Suzuki S, Sunaga H, Seki M, Mori S, Tsuzuki H, Funatsu I, Saito H. [Bacterial infection and production of immunoglobulin in the tonsil]. Rinsho Byori 1999; 47:724-9. [PMID: 10511803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Immunoglobulin (Ig) isotype switching is the process whereby B cells initially expressing IgM and/or IgD on their surface switch to other Ig heavy-chain loci. We demonstrated that TGF-beta, IL-10 and VIP in the presence of CD40 mAb, can induce isotype switching for IgA in human tonsillar B cells by the generation of switch circular DNA (S alpha/S mu), the induction of alpha germ-line transcripts and a significant amount of IgA production. IgA is the predominant immunoglobulin effector molecule of mucosal immunity that functions as the first line of specific immunologic defense against many microbial pathogens. However, IgA causes IgA nephropathy. We investigated here, whether tonsillar mononuclear cells from patients with IgA nephropathy produce HP-specific IgA and/or IgA-related cytokines by stimulation with components of HP outer membranes (OMHP). HP-specific IgA was predominately induced by tonsillar mononuclear cells of IgA nephropathy, compared to those from chronic tonsillitis. Production of IL-10 and TGF-beta was enhanced by stimulation with OMHP in tonsillar mononuclear cells from IgA nephropathy. These results suggested that local infection of HP and HP-specific IgA induction in the tonsil are associated with pathogens in IgA nephropathy.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University
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24
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Fujieda S, Inuzuka M, Tanaka N, Sunaga H, Fan GK, Ito T, Sugimoto C, Tsuzuki H, Saito H. Expression of p27 is associated with Bax expression and spontaneous apoptosis in oral and oropharyngeal carcinoma. Int J Cancer 1999; 84:315-20. [PMID: 10371353 DOI: 10.1002/(sici)1097-0215(19990621)84:3<315::aid-ijc20>3.0.co;2-u] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [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: 11/08/2022]
Abstract
p27Kip1, a cyclin-dependent kinase inhibitor, is a negative regulator of the cell cycle, and apoptosis is a genetically encoded program of cell death. To clarify the relationship between the cell cycle and apoptosis, we investigated expression of p27, cyclin D1 and apoptosis-related proteins (p53, Bax, Bcl-2 and c-Myc) in 60 cases of oral and oropharyngeal squamous-cell carcinoma (SCC) using an immuno-histochemical approach, and evaluated spontaneous apoptosis in vivo. Our most notable finding was that spontaneous apoptosis in the p27-positive group was significantly higher than that in the p27-negative group (p = 0.028). In addition, the percentage of p27-positive cells was clearly correlated with that of Bax-positive cells (gamma = 0.288, p = 0.028) and with that of cyclin D1-positive cells (gamma = 0.416, p = 0.002). Expression of p27 was inversely associated with the clinical stage of total tumor progression (p = 0.027). However, no correlation was found between p27 expression and the following parameters: gender, tumor size, lymph node metastasis, overall survival and disease-free survival. Our results give evidence that the action of the cell-cycle regulator p27 is closely linked with apoptosis in clinical samples from patients and indicate that over-expression of p27 might induce apoptosis in cancer cells through elevation of Bax expression, thereby acting on tumor progression.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan.
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25
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Ito T, Fujieda S, Tsuzuki H, Sunaga H, Fan G, Sugimoto C, Fukuda M, Saito H. Decreased expression of Bax is correlated with poor prognosis in oral and oropharyngeal carcinoma. Cancer Lett 1999; 140:81-91. [PMID: 10403545 DOI: 10.1016/s0304-3835(99)00055-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 11/30/2022]
Abstract
We investigated the expression of apoptosis-related factors, p53, Bax, Bcl-2, and spontaneous apoptosis in 57 cases of oral and oropharyngeal squamous cell carcinoma (SCC) by immunochemical staining and ApopTag kit. Positive expression of Bax was inversely associated with advanced tumor stage (P = 0.0225), lymph node metastasis (P = 0.0225), clinical stage (P = 0.0083) and poor prognosis (P = 0.0478). Positive expression of p53 was related to poor prognosis (P = 0.0445) and was associated with negative expression of Bax (P = 0.0439). The apoptosis index did not correlate with clinical outcome. These results suggest that abnormality of Bax expression plays an important role in tumor progression in oral and oropharyngeal SCC.
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Affiliation(s)
- T Ito
- Department of Otorhinolaryngology, Fukui Medical University, Matsuoka, Yoshida, Japan.
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26
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Kiyama R, Tamura Y, Watanabe F, Tsuzuki H, Ohtani M, Yodo M. Homology modeling of gelatinase catalytic domains and docking simulations of novel sulfonamide inhibitors. J Med Chem 1999; 42:1723-38. [PMID: 10346925 DOI: 10.1021/jm980514x] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.4] [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: 11/29/2022]
Abstract
Three-dimensional models for the catalytic domain of gelatinases (MMP-9 and -2) have been constructed based on the X-ray crystal structure of MMP-3. Conformations of the loop segment which forms the bottom half of the S1' subsite but shows conformational diversity among the crystal structures of other MMPs have been explored by simulated annealing of each gelatinase model complexed with two highly potent "probe" inhibitors. Representative catalytic domain models have been selected for each gelatinase from the set of generated conformations based on shape complementarity of the loop to the probe inhibitors. The single model selected for MMP-9 was utilized to explain the structure-activity relationship of our novel sulfonamide inhibitors. Molecular dynamics (MD) simulations of the complex models revealed important features of the binding mechanism of our inhibitors: (i) the ligand carboxylate group coordinating to the catalytic zinc ion and hydrogen bonding to the Glu219 side chain, (ii) one of the sulfonyl oxygens forming hydrogen bonds with the main chain NHs (Leu181 and Ala182), (iii) the sulfonyl substituent making extensive hydrophobic contact with the S1' subsite. The gauche conformation exclusively adopted by the sulfonamide C-N-S-C torsion plays an important role in achieving the third binding feature by properly directing the substituent into the S1' subsite. Improvement of the inhibitory activity according to straight elongation of the sulfonyl substituent was attributed to an increase of the hydrophobic contact between the substituent and the S1' subsite. Structural modifications which alter the straight shape of the substituent lead to deterioration of the activity. On the other hand, the two candidate models selected for MMP-2 differ in the bottom shape of the S1' subsite: one with a channel-like subsite and the other with a pocket-like subsite resembling that of the MMP-9 model. The bottom shape was experimentally probed by chemical synthesis of inhibitors having elongated sulfonyl substituents whose terminal alkyl groups were shown by MD simulations to protrude from the S1' subsite bottom into the solvent. Gelatinase assays of these inhibitors showed that elongation of the substituent significantly reduces activity against MMP-9 while retaining activity against MMP-2, consequently increasing the selectivity between MMP-2 and -9. The results confirm that MMP-9 has a pocket-like S1' subsite with a floorboard and MMP-2 has a channel-like S1' subsite.
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Affiliation(s)
- R Kiyama
- Shionogi Research Laboratories, Shionogi & Company, Ltd., Sagisu, Fukushima-ku, Osaka 553-0002, Japan
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27
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Abstract
OBJECTIVE A cyclin-dependent kinase inhibitor, p27kip1, is recognized as a negative regulator of the cell cycle. To clarify whether immunohistochemical detection of p27 might provide prognostic information, we investigated the expression of p27 in laryngeal squamous cell carcinoma (SCC). STUDY DESIGN A retrospective study of patients was performed in 109 cases of laryngeal SCC. In addition, we investigated the expression of p53 and granulocyte colony-stimulating factor receptor (GCSF-R) to examine the prognostic significance of them in the same samples. METHODS Immunohistochemical staining by specific monoclonal antibodies was performed using the avidin-biotin-peroxidase complex technique. RESULTS Advanced tumor size and clinical stage and the occurrence of lymph node metastasis were associated with the absence of p27 expression, but not correlated with p53 expression and GCSF-R expression. The overall 5-year survival rate in the p27-positive group was significantly higher than that in the p27-negative group. In the Cox proportional hazard model, p27 was demonstrated to be the most powerful prognostic factor among gender, tumor size, lymph node metastasis, stage of disease, and p53 and GCSF-R expression. CONCLUSIONS We concluded that assessment of p27 expression is useful as a prognostic factor for laryngeal SCC and of value in selecting patients with laryngeal SCC for aggressive therapy.
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Affiliation(s)
- G K Fan
- Department of Otorhinolaryngology, Fukui Medical University, Japan
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28
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Hashido M, Mukouyama A, Sakae K, Tsuzuki H, Yamashita T, Inada T, Inouye S. Molecular and serological characterization of adenovirus genome type 7h isolated in Japan. Epidemiol Infect 1999; 122:281-6. [PMID: 10355793 PMCID: PMC2809617 DOI: 10.1017/s0950268899002149] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [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: 11/07/2022] Open
Abstract
In 1996, three adenovirus type 7 (Ad7) strains were isolated from children with fever and upper respiratory diseases in Japan. Restriction endonucleases (REs) analysis and PCR amplification of the E3 7.7 kDa ORF revealed that these strains were genotype Ad7h and closely related to an Argentine Ad7h strain, which has been reported to be highly virulent and so far predominant only in South America. These strains showed weak cross-neutralizing activity and specific haemagglutination-inhibition activity to Ad3 antiserum. The present findings suggest that Ad7h in South America has spread to other parts of the world. Since the seroprevalence to Ad7 in the current Japanese population is very low due to the absence of Ad7 circulation in Japan for decades, Ad7 outbreak as a typical case of re-emerging infectious diseases is a cause for serious concern.
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Affiliation(s)
- M Hashido
- Infectious Diseases Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
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29
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Fujieda S, Lee K, Sunaga H, Tsuzuki H, Ikawa H, Fan GK, Imanaka M, Takenaka H, Saito H. Staining of interleukin-10 predicts clinical outcome in patients with nasopharyngeal carcinoma. Cancer 1999; 85:1439-45. [PMID: 10193932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
BACKGROUND Interleukin-10 (IL-10) has been implicated as an important modulator of lymphoid cells, and its sequence is homologous to an open reading frame in the Epstein-Barr virus (EBV) genome. Nasopharyngeal carcinoma (NPC) is a representative tumor related to EBV infection. METHODS The authors investigated the expression of IL-10 in 21 primary NPCs by using an immunohistochemical approach to examine its prognostic significance. RESULTS IL-10 staining was positive in 12 of 21 primary NPCs (57%). There was no association between IL-10 expression and gender, tumor size, the occurrence of lymph node metastases, clinical stage, or recurrence. However, there was a significant difference in overall survival between the negative expression and positive expression of IL-10 (P = 0.0348). Although 87.5% of the IL-10 negative group survived for 5 years, only 15.6% of IL-10 positive patients survived for that length of time by the Kaplan-Meier method. IL-10 expression was significant as an independent prognostic indicator of overall survival by multivariate analysis using the Cox proportional hazards model (odds ratio, 26.64; P = 0.0019). CONCLUSIONS The results imply that expression of IL-10 is a prognostic factor in patients with NPC and may prove valuable in selecting patients with NPC who are candidates for aggressive therapy.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan
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30
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Maekawa R, Maki H, Yoshida H, Hojo K, Tanaka H, Wada T, Uchida N, Takeda Y, Kasai H, Okamoto H, Tsuzuki H, Kambayashi Y, Watanabe F, Kawada K, Toda K, Ohtani M, Sugita K, Yoshioka T. Correlation of antiangiogenic and antitumor efficacy of N-biphenyl sulfonyl-phenylalanine hydroxiamic acid (BPHA), an orally-active, selective matrix metalloproteinase inhibitor. Cancer Res 1999; 59:1231-5. [PMID: 10096553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The antiangiogenic activity and antitumor efficacy of a newly developed matrix metalloproteinase (MMP) inhibitor were examined. N-biphenyl sulfonyl-phenylalanine hydroxiamic acid (BPHA) potently inhibits MMP-2, -9, and -14, but not MMP-1, -3, or -7. In contrast, (-)BPHA, an enantiomer of BPHA, was inactive against all MMPs tested. Daily oral administration of 200 mg/kg BPHA, but not (-)BPHA in mice resulted in potent inhibition of tumor-induced angiogenesis, primary tumor growth, and liver metastasis. The growth inhibition activity of BPHA was 48% and 45% in a B16-BL6 melanoma and F2 hemangio-endothelioma model, respectively. BPHA also showed 42% inhibition of the liver metastasis of C-1H human colon carcinoma cells. These results indicate that selective MMP inhibition is correlated with antiangiogenic and antitumor efficacy and that the selective MMP inhibitor BPHA has therapeutic potential.
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Affiliation(s)
- R Maekawa
- Discovery Research Laboratories, Shionogi and Company, Ltd., Osaka, Japan
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31
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Noda I, Fujieda S, Ohtsubo T, Tsuzuki H, Tanaka N, Sunaga H, Saito H. Granulocyte-colony-stimulating factor enhances invasive potential of human head-and-neck-carcinoma cell lines. Int J Cancer 1999. [PMID: 9935235 DOI: 10.1002/(sici)1097-0215(19990105)80: 1<78: : aid-ijc16>3.0.co; 2-s] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Granulocyte-colony-stimulating factor (G-CSF), a hematopoietic cytokine, regulates the proliferation and differentiation of granulocytic progenitor cells and functionally activated mature neutrophils. G-CSF also affects nonhematopoietic tumor cells by the binding of G-CSF to its specific receptor (G-CSFR) on the cells. In this study, we investigated the effect of G-CSF on the invasive potential of head-and-neck carcinoma cells, and explored the intracellular events initiated by the binding of G-CSF in tumor cells. In vitro treatment of head-and-neck-carcinoma cell lines, IMC-2, IMC-3, KB, Ca9-22, SCCKN and SCCTF, with recombinant G-CSF (rG-CSF) significantly augmented their invasive potential in dose- and time-dependent manners. Among these cancer cells, IMC-2, IMC-3, KB and Ca9-22 cells produced little G-CSF, while large amounts of G-CSF were produced by SCCKN and SCCTF cell lines. Anti-G-CSF antibody (Ab) abrogated the rG-CSF-enhanced invasiveness to the control level of that in untreated cancer cell lines. Immunocytochemical staining and Western blotting using anti-G-CSFR monoclonal antibody (MAb) revealed the expression of G-CSFR on head-and-neck-cancer cell lines exhibiting the enhancement of invasive activity by rG-CSF. IMC-2 cells, having the highest invasive ability among the cell lines used, showed augmentation of G-CSFR expression on stimulation with rG-CSF. Furthermore, stimulation of IMC-2 cells with rG-CSF induced rapid activation of tyrosine-phosphorylated JAK1, suggesting that the G-CSF signal may be transduced into the cells through G-CSFR. Moreover, the gelatinolytic activity of IMC-2 cells was enhanced by stimulation of rG-CSF, and the enhanced invasiveness was inhibited on addition of the tissue inhibitors of metalloproteinases (TIMPs). These results suggest that exogenous rG-CSF may increase the risk of metastasis and/or local recurrence in patients with G-CSFR-positive head-and-neck squamous-cell carcinoma, via an invasive mechanism.
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Affiliation(s)
- I Noda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan
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32
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Noda I, Fujieda S, Ohtsubo T, Tsuzuki H, Tanaka N, Sunaga H, Saito H. Granulocyte-colony-stimulating factor enhances invasive potential of human head-and-neck-carcinoma cell lines. Int J Cancer 1999. [PMID: 9935235 DOI: 10.1002/(sici)1097-0215(19990105)80:1<78::aid-ijc16>3.0.co;2-s] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Granulocyte-colony-stimulating factor (G-CSF), a hematopoietic cytokine, regulates the proliferation and differentiation of granulocytic progenitor cells and functionally activated mature neutrophils. G-CSF also affects nonhematopoietic tumor cells by the binding of G-CSF to its specific receptor (G-CSFR) on the cells. In this study, we investigated the effect of G-CSF on the invasive potential of head-and-neck carcinoma cells, and explored the intracellular events initiated by the binding of G-CSF in tumor cells. In vitro treatment of head-and-neck-carcinoma cell lines, IMC-2, IMC-3, KB, Ca9-22, SCCKN and SCCTF, with recombinant G-CSF (rG-CSF) significantly augmented their invasive potential in dose- and time-dependent manners. Among these cancer cells, IMC-2, IMC-3, KB and Ca9-22 cells produced little G-CSF, while large amounts of G-CSF were produced by SCCKN and SCCTF cell lines. Anti-G-CSF antibody (Ab) abrogated the rG-CSF-enhanced invasiveness to the control level of that in untreated cancer cell lines. Immunocytochemical staining and Western blotting using anti-G-CSFR monoclonal antibody (MAb) revealed the expression of G-CSFR on head-and-neck-cancer cell lines exhibiting the enhancement of invasive activity by rG-CSF. IMC-2 cells, having the highest invasive ability among the cell lines used, showed augmentation of G-CSFR expression on stimulation with rG-CSF. Furthermore, stimulation of IMC-2 cells with rG-CSF induced rapid activation of tyrosine-phosphorylated JAK1, suggesting that the G-CSF signal may be transduced into the cells through G-CSFR. Moreover, the gelatinolytic activity of IMC-2 cells was enhanced by stimulation of rG-CSF, and the enhanced invasiveness was inhibited on addition of the tissue inhibitors of metalloproteinases (TIMPs). These results suggest that exogenous rG-CSF may increase the risk of metastasis and/or local recurrence in patients with G-CSFR-positive head-and-neck squamous-cell carcinoma, via an invasive mechanism.
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Affiliation(s)
- I Noda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan
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33
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Fujieda S, Sunaga H, Tsuzuki H, Fan GK, Saito H. IL-10 expression is associated with the expression of platelet-derived endothelial cell growth factor and prognosis in oral and oropharyngeal carcinoma. Cancer Lett 1999; 136:1-9. [PMID: 10211932 DOI: 10.1016/s0304-3835(98)00281-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [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: 10/18/2022]
Abstract
We investigated the expression of IL-10 in oral and oropharyngeal squamous cell carcinoma (SCC) specimens by an immunohistochemical technique. Of 58 SCC, 13 (22%) and 35 (60%) cases showed intense and moderate positive staining of IL-10, respectively. There was no association between the staining of IL-10 and clinicopathological features. However, the patients with intense staining of IL-10 had a significantly lower overall survival rate than those with moderate or negative staining of IL-10 (P = 0.019). In addition, the patients with intense staining of IL-10 had the highest score of platelet-derived endothelial cell growth factor (PD-ECGF), which is established as a poor prognostic indicator (P = 0.0105). These results suggested that IL-10 contributes to the clinical outcome of oral and oropharyngeal SCC.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan.
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34
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Noda I, Fujieda S, Seki M, Tanaka N, Sunaga H, Ohtsubo T, Tsuzuki H, Fan GK, Saito H. Inhibition of N-linked glycosylation by tunicamycin enhances sensitivity to cisplatin in human head-and-neck carcinoma cells. Int J Cancer 1999; 80:279-84. [PMID: 9935211 DOI: 10.1002/(sici)1097-0215(19990118)80:2<279::aid-ijc18>3.0.co;2-n] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [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: 11/09/2022]
Abstract
Tunicamycin (TM), a naturally occurring antibiotic, blocks the first step in the biosynthesis of N-linked oligosaccharides in cells. In this study, we investigated whether changes in N-linked glycosylation affect the sensitivity of head-and-neck carcinoma cell lines to cis-diaminedichloroplatinum(II) (cisplatin) in vitro and in vivo. In vitro treatment of the IMC-3 and KB cell lines with TM significantly decreased the 50% inhibitory concentration (IC50) of cisplatin, as determined by the MTT assay (24.15 to 10.97 microg/ml, p < 0.05). In addition, TM significantly decreased the IC50 of cisplatin against established cisplatin-resistant IMC-3/CR cells (>100 to 14.4 microg/ml, p < 0.05) to levels similar to those against parental IMC-3 cells. TM treatment decreased the number of Con A- and L-PHA-binding sites on the surface of tumor cells but had no effect on the intracellular platinum concentration. Induction of apoptosis in vitro by TM plus cisplatin in combination was increased compared with that by cisplatin alone. Furthermore, in vivo administration of TM plus cisplatin in combination significantly inhibited local tumor growth in the cisplatin-resistant in vivo C3H/He mouse model as compared with the control group (p < 0.05) and increased in vivo apoptosis of tumor cells. Our results suggest that the manipulation of glycosylation by TM in tumor cells might be a useful therapeutic strategy for successful chemotherapy using cisplatin against head-and-neck cancer.
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Affiliation(s)
- I Noda
- Department of Otorhinolaryngology, Fukui Medical University, Japan
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35
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Abstract
Granulocyte-colony-stimulating factor (G-CSF), a hematopoietic cytokine, regulates the proliferation and differentiation of granulocytic progenitor cells and functionally activated mature neutrophils. G-CSF also affects nonhematopoietic tumor cells by the binding of G-CSF to its specific receptor (G-CSFR) on the cells. In this study, we investigated the effect of G-CSF on the invasive potential of head-and-neck carcinoma cells, and explored the intracellular events initiated by the binding of G-CSF in tumor cells. In vitro treatment of head-and-neck-carcinoma cell lines, IMC-2, IMC-3, KB, Ca9-22, SCCKN and SCCTF, with recombinant G-CSF (rG-CSF) significantly augmented their invasive potential in dose- and time-dependent manners. Among these cancer cells, IMC-2, IMC-3, KB and Ca9-22 cells produced little G-CSF, while large amounts of G-CSF were produced by SCCKN and SCCTF cell lines. Anti-G-CSF antibody (Ab) abrogated the rG-CSF-enhanced invasiveness to the control level of that in untreated cancer cell lines. Immunocytochemical staining and Western blotting using anti-G-CSFR monoclonal antibody (MAb) revealed the expression of G-CSFR on head-and-neck-cancer cell lines exhibiting the enhancement of invasive activity by rG-CSF. IMC-2 cells, having the highest invasive ability among the cell lines used, showed augmentation of G-CSFR expression on stimulation with rG-CSF. Furthermore, stimulation of IMC-2 cells with rG-CSF induced rapid activation of tyrosine-phosphorylated JAK1, suggesting that the G-CSF signal may be transduced into the cells through G-CSFR. Moreover, the gelatinolytic activity of IMC-2 cells was enhanced by stimulation of rG-CSF, and the enhanced invasiveness was inhibited on addition of the tissue inhibitors of metalloproteinases (TIMPs). These results suggest that exogenous rG-CSF may increase the risk of metastasis and/or local recurrence in patients with G-CSFR-positive head-and-neck squamous-cell carcinoma, via an invasive mechanism.
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Affiliation(s)
- I Noda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan
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36
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Fujieda S, Tanaka N, Sunaga H, Noda I, Sugimoto C, Tsuzuki H, Saito H. Expression of hMSH2 correlates with in vitro chemosensitivity to CDDP cytotoxicity in oral and oropharyngeal carcinoma. Cancer Lett 1998; 132:37-44. [PMID: 10397451 DOI: 10.1016/s0304-3835(98)00157-8] [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]
Abstract
We investigated the expression of hMSH2, a human mutS homologue from chromosome 2p, in oral and oropharyngeal squamous cell carcinoma (SCC) by an immunohistochemical technique and performed tumor in vitro chemosensitivity testing. In 58 oral and oropharyngeal SCC, the hMSH2 positive score was inversely associated with tumor size, but not with other clinical parameters. Among five anticancer drugs (cisplatin (CDDP), 5-FU, peplomycin, mitomycin C and doxorubicin), only for CDDP was sensitivity to cytotoxicity correlated with the hMSH2 positive score. The susceptibility of hMSH2-positive tumors to CDDP killing was significantly higher than that of hMSH2-negative tumors. Immunohistochemical results regarding hMSH2 are promising in the evaluation of the sensitivity of cancer cells to CDDP cytotoxicity and enable one to select patients for adjuvant chemotherapy for oral and oropharyngeal SCC.
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida-gun, Japan.
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37
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Yamashita T, Sakae K, Tsuzuki H, Suzuki Y, Ishikawa N, Takeda N, Miyamura T, Yamazaki S. Complete nucleotide sequence and genetic organization of Aichi virus, a distinct member of the Picornaviridae associated with acute gastroenteritis in humans. J Virol 1998; 72:8408-12. [PMID: 9733894 PMCID: PMC110230 DOI: 10.1128/jvi.72.10.8408-8412.1998] [Citation(s) in RCA: 200] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/1998] [Accepted: 07/08/1998] [Indexed: 11/20/2022] Open
Abstract
The complete nucleotide sequence of a novel enteric virus, Aichi virus, associated with nonbacterial acute gastroenteritis in humans was determined. The Aichi virus genome proved to be a single-stranded positive-sense RNA molecule with 8,251 bases excluding a poly(A) tail; it contains a large open reading frame with 7,302 nucleotides that encodes a potential polyprotein precursor of 2,433 amino acids. The genome contains a 5' nontranslated region (NTR) with 712 bases and a 3' NTR with 240 bases followed by a poly(A) tail. The structure of the genome, VPg-5' NTR-leader protein-structural proteins-nonstructural proteins-3' NTR-poly(A), was found to be typical of a picornavirus. The VP0-VP3 and VP3-VP1 cleavage sites were determined to be Q-H and Q-T, respectively, by N-terminal amino acid sequence analyses using purified virion proteins. Possible cleavage sites, Q-G, Q-A, and Q-S, which cleave P2 and P3 polyproteins were found to be similar to those of picornaviruses. A dendrogram based on 3Dpol proteins indicated that Aichi virus is genetically distinct from the known six genera of picornaviruses including entero-, rhino-, cardio-, aphtho-, and hepatovirus and echovirus 22. Considering this together with other properties of the virus (T. Yamashita, S. Kobayashi, K. Sakae, S. Nakata, S. Chiba, Y. Ishihara, and S. Isomura, J. Infect. Dis. 164:954-957, 1991), we propose that Aichi virus be regarded as a new genus of the family Picornaviridae.
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Affiliation(s)
- T Yamashita
- Department of Virology, Aichi Prefectural Institute of Public Health, Nagoya, Aichi 462-8576, Japan
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38
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Fujieda S, Sunaga H, Tsuzuki H, Tanaka N, Saito H. Expression of platelet-derived endothelial cell growth factor in oral and oropharyngeal carcinoma. Clin Cancer Res 1998; 4:1583-90. [PMID: 9676830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Platelet-derived endothelial cell growth factor (PD-ECGF) was isolated as an endothelial cell mitogen from platelets. In this study, we investigated the expression of PD-ECGF and counted microvessels in 58 oral and oropharyngeal squamous cell carcinoma (SCC) specimens by an immunohistochemical technique to examine their prognostic significance and performed tumor in vitro sensitivity to 5-fluorouracil (5-FU) and cisplatin as determined by a bioluminescence assay of the ATP values of tumor cells after continuous exposure. The percentage of PD-ECGF-positive tumor cells (PD-ECGF score) was correlated with the frequency of the recurrence of disease (P=0.0043) but not with sex, tumor size, metastasis, or clinical stage. Overall survival of the high PD-ECGF expression group (>40% PD-ECGF score) was shorter than the low expression (<40%) group (P=0.0365). Vessel count was correlated with lymph node metastasis and clinical stage. The survival of patients with hypervascularity (more than the median of intratumor vessel counts, >82) was shorter than that of those with hypovascularity (vessel count <81, P=0.0446). However, there was no association between PD-ECGF expression and vessel count. Cox proportional multivariate analysis showed that PD-ECGF expression was the most significant independent prognostic indicator for overall survival. The susceptibility to 5-FU cytotoxicity in the extremely high PD-ECGF expression groups (>70% of PD-ECGF score) was significantly higher than that in the low group, whereas there was no difference in their sensitivity to cisplatin. These results showed that carcinoma cells with high PD-ECGF expression were sensitive to 5-FU in spite of poor prognosis. These data provide further information when deciding on adjuvant therapy for oral and oropharyngeal SCCs.
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MESH Headings
- Analysis of Variance
- Antimetabolites, Antineoplastic/therapeutic use
- Carcinoma, Squamous Cell/blood supply
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/mortality
- Female
- Fluorouracil/therapeutic use
- Humans
- Male
- Middle Aged
- Mouth Neoplasms/blood supply
- Mouth Neoplasms/drug therapy
- Mouth Neoplasms/metabolism
- Mouth Neoplasms/mortality
- Neoplasm Proteins/metabolism
- Neoplasm Recurrence, Local/blood supply
- Neoplasm Recurrence, Local/drug therapy
- Neoplasm Recurrence, Local/metabolism
- Neoplasm Recurrence, Local/mortality
- Neovascularization, Pathologic/mortality
- Oropharyngeal Neoplasms/blood supply
- Oropharyngeal Neoplasms/drug therapy
- Oropharyngeal Neoplasms/metabolism
- Oropharyngeal Neoplasms/mortality
- Proportional Hazards Models
- Thymidine Phosphorylase/metabolism
- Time Factors
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Affiliation(s)
- S Fujieda
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan.
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39
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Tsuzuki H, Fujieda S, Sunaga H, Sugimoto C, Tanaka N, Saito H. Expression of multidrug resistance-associated protein (MRP) in head and neck squamous cell carcinoma. Cancer Lett 1998; 126:89-95. [PMID: 9563653 DOI: 10.1016/s0304-3835(97)00540-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/07/2023]
Abstract
We investigated the expression of multidrug resistance-associated protein (MRP) in 115 cases of head and neck squamous cell carcinoma (H&NSCC) by immunohistochemistry and examined the relationship between MRP expression and clinical factors. Thirty-four (30%) of 115 cases of H&NSCC had expression of MRP. The clinical stage was inversely associated with the expression of MRP (P = 0.0090), but not with age, sex, tumor size, metastasis, recurrence, death from disease or overall survival rate for 5 years. In vitro chemosensitivity to five chemotherapeutic agents (cis-diamminedichloroplatinum, 5-fluorouracil, peplomycin, mitomycin C and Adriamycin) was tested by ATP assay and no correlation between the sensitivity of tumor cells to the cytotoxicity of any drug and MRP expression was found. These results suggest that the resistance to anticancer drugs is not dependent only on the expression of MRP in H&NSCC.
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Affiliation(s)
- H Tsuzuki
- Department of Otorhinolaryngology, Fukui Medical University, Japan.
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40
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Tsuzuki H, Fujieda S, Sunaga H, Noda I, Saito H. Expression of granulocyte colony-stimulating factor receptor correlates with prognosis in oral and mesopharyngeal carcinoma. Cancer Res 1998; 58:794-800. [PMID: 9485037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Granulocyte colony-stimulating factor receptors (G-CSFRs) have been observed on the surface of not only hematopoietic cells but also several cancer cells. The stimulation of G-CSF has been demonstrated to induce proliferation and activation of G-CSFR-positive cells. In this study, we investigated the expression of G-CSFR on the surface of tumor cells and G-CSF production in oral and mesopharyngeal squamous cell carcinoma (SCC) by an immunohistochemical approach. Of 58 oral and mesopharyngeal SCCs, 31 cases (53.4%) and 36 cases (62.1%) were positive for G-CSFR and G-CSF, respectively. There was no association between G-CSFR expression and G-CSF staining. In the group positive for G-CSFR expression, relapse was significantly more likely after primary treatment (P = 0.0069), whereas there was no association between G-CSFR expression and age, sex, tumor size, lymph node metastasis, and clinical stage. Also, the G-CSFR-positive groups had a significantly lower disease-free and overall survival rate than the G-CSFR-negative groups (P = 0.0172 and 0.0188, respectively). However, none of the clinical markers correlated significantly with G-CSF staining, nor did the status of G-CSF production influence the overall survival. The results imply that assessment of G-CSFR may prove valuable in selecting patients with oral and mesopharyngeal SCC for aggressive therapy.
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Affiliation(s)
- H Tsuzuki
- Department of Otorhinolaryngology, Fukui Medical University, Yoshida-gun, Japan
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41
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Tamura Y, Watanabe F, Nakatani T, Yasui K, Fuji M, Komurasaki T, Tsuzuki H, Maekawa R, Yoshioka T, Kawada K, Sugita K, Ohtani M. Highly selective and orally active inhibitors of type IV collagenase (MMP-9 and MMP-2): N-sulfonylamino acid derivatives. J Med Chem 1998; 41:640-9. [PMID: 9484512 DOI: 10.1021/jm9707582] [Citation(s) in RCA: 240] [Impact Index Per Article: 9.2] [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: 02/06/2023]
Abstract
Various N-sulfonylamino acid derivatives were synthesized and evaluated for their in vitro and in vivo activities to inhibit type IV collagenase (MMP-9 and MMP-2). When the amino acid residue and the sulfonamide moiety were modified, their inhibitory activities were greatly affected by the structure of the sulfonamide moiety. A series of aryl sulfonamide derivatives containing biaryl, tetrazole, amide, and triple bond were found to be potent and highly selective inhibitors of MMP-9 and MMP-2. In addition, these compounds were orally active in animal models of tumor growth and metastasis. These results revealed the potential of the N-sulfonylamino acid derivatives as a new type of candidate drug for the treatment of cancer.
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Affiliation(s)
- Y Tamura
- Shionogi Research Laboratory, Shionogi & Co., Ltd., Osaka, Japan
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42
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Saito T, Zhang ZJ, Tsuzuki H, Ohtsubo T, Yamada T, Yamamoto T, Saito H. Expression of P-glycoprotein in inner ear capillary endothelial cells of the guinea pig with special reference to blood-inner ear barrier. Brain Res 1997; 767:388-92. [PMID: 9367275 DOI: 10.1016/s0006-8993(97)00821-4] [Citation(s) in RCA: 19] [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: 02/05/2023]
Abstract
Expression of P-glycoprotein (P-gp) was detected immunohistochemically in the guinea pig inner ear using mouse anti-P-gp monoclonal antibody C219. P-gp was found only in the capillary endothelial cells of the cochlea and vestibule. The pattern of P-gp immunostaining in the inner ear was similar to that of the brain. The present investigation suggested that P-gp expression in inner ear capillary endothelial cells might play an important role in the blood-inner ear barrier by acting as an extrusion pump.
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Affiliation(s)
- T Saito
- Department of Otolaryngology, Fukui Medical School, Japan
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43
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Okamoto H, Fujiwara T, Nakamura E, Katoh T, Iwamoto H, Tsuzuki H. Purification and characterization of a glutamic-acid-specific endopeptidase from Bacillus subtilis ATCC 6051; application to the recovery of bioactive peptides from fusion proteins by sequence-specific digestion. Appl Microbiol Biotechnol 1997; 48:27-33. [PMID: 9274045 DOI: 10.1007/s002530051010] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/05/2023]
Abstract
Screening cultures of nonpathogenic microorganisms led us to a glutamic-acid-specific endopeptidase from Bacillus subtilis ATCC 6051, which we purified and named BSase. The nucleotide sequence encoding BSase, with a molecular mass of 23,894 Da, completely agreed with that of the mpr gene, which had been reported by Rufo Jr. and Sloma et al. to encode a metalloprotease [J Bacteriol (1990) 172: 1019-1023 and 1024-1029 respectively]. However, enzymatic characterization revealed it to have the catalytic triad of a serine protease and not the consensus sequence of a metalloprotease, and it was inhibited by diisopropylfluorophosphate. We therefore consider BSase (mpr) to be a serine protease. In the alignment of the acidic-amino-acid-specific proteases, the proteases from bacilli have a highly conserved histidine residue, which is most important in the histidine triad in the proteases from streptomycetes. Furthermore, Ca2+ was necessary for its activity and stability. BSase cleaved the C-terminal glutamic acid with high specificity and was very stable over a wide pH range. On the basis of these properties, we tried to retrieve a bioactive peptide from a fusion protein by sequence-specific digestion, and succeeded in obtaining the bioactive peptide. BSase was found to be very useful as a tool for selective cleavage.
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Affiliation(s)
- H Okamoto
- Shionogi Research Laboratories, Shionogi & Co. Ltd, Osaka, Japan
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44
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Ohtsubo T, Saito H, Tanaka N, Tsuzuki H, Saito T, Kano E. In vitro effect of hyperthermia on chemoenhancement and uptake of cisplatin in human pharyngeal carcinoma KB cells. Chemotherapy 1997; 43:43-50. [PMID: 8996741 DOI: 10.1159/000239534] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [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: 02/03/2023]
Abstract
The purpose of this study was to assess the efficacy of hyperthermia (42 or 44 degrees C) as a modifier of cis-diamminedichloroplatinum (II) (CDDP) cytotoxicity and platinum incorporation in human pharyngeal carcinoma KB cells. To maximize the interactive effect, we examined the time sequence of high (above 43 degrees C) or low (below 43 degrees C) hyperthermia and CDDP. Within the dose range of CDDP studied, there was a marked synergism between the effects of heating at 44 degrees C and subsequent CDDP exposure for 5 h. Pretreatment at 44 degrees C for 30 min or at 42 degrees C for 4 h enhanced CDDP cytotoxicity more than posttreatment at 44 degrees C for 30 min or at 42 degrees C for 4 h. However, the chemoenhancement ratio of pretreatment at 44 degrees C for 30 min was higher then that of pretreatment at 42 degrees C for 4 h, although the thermal isotoxic dose decreased the cell count to 60% under both conditions. There was a significant increase in CDDP uptake after hyperthermia at 44 degrees C. These results indicate that high hyperthermia effectively enhances subsequent CDDP cytotoxicity in human pharyngeal carcinoma KB cells.
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Affiliation(s)
- T Ohtsubo
- Department of Otolaryngology, Fukui Medical School, Japan
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45
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Tsuzuki H, Niki M, Ueda H, Abe H, Kurosu Y. [Successful combination chemotherapy for a post-operative gastric cancer patient with multiple liver metastases and elevated CEA]. Gan To Kagaku Ryoho 1996; 23:779-81. [PMID: 8645029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A 75-year-old male was admitted one year after surgery for advanced gastric cancer. He was diagnosed as having multiple liver metastases with elevated serum CEA level. Combination chemotherapy consisting of THP-ADM, MMC and 5'-DFUR was done in the outpatient clinic. As a result, both multiple metastatic liver tumors and serum CEA level showed a remarkable response.
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Affiliation(s)
- H Tsuzuki
- Dep. of Surgery, Yokohama Chuo Hospital, Japan
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46
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Sugimoto C, Matsukawa S, Fujieda S, Noda I, Tanaka N, Tsuzuki H, Saito H. Involvement of intracellular glutathione in induction of apoptosis by cisplatin in a human pharyngeal carcinoma cell line. Anticancer Res 1996; 16:675-80. [PMID: 8687113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We investigated the effect of intracellular glutathione (GSH) levels on apoptosis in KB cells induced by cisplatin (CDDP). The mode of cell death, apoptosis or necrosis, was evaluated by biochemical and morphological criteria. The treatment of KB cells with D,L-buthionine-(S,R)-sulfoximine (BSO, a gamma-glutamyl cysteine synthetase inhibitor) decreased GSH level to 1/7th of that of control cells, and augmented cell death induced by CDDP via a necrotic rather than apoptotic process (the ratio of necrosis to apoptosis; n/a>14). In contrast, treatment with 2-oxothiazolidine-4-carboxylic acid (OTZ, a precursor of cysteine) increased GSH levels 1.7 fold compared with that of untreated cells, inhibited cell death induced by CDDP and switched the mode of cell death from necrosis to apoptosis (n/a<0.8, similar to untreated cells). These results suggest that the GSH level affects the cytotoxicity of CDDP and plays an important role in switching the mode of cell death induced by CDDP.
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Affiliation(s)
- C Sugimoto
- Department of Otolaryngology, Fukui Medical School, Matsuoka-cho, Japan
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47
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Abstract
Mutations of the p53 tumor suppressor gene are frequent in lung cancers. It is suggested that p53 mutations are associated with smoking-induced lung carcinogenesis. We examined p53 mutations in 53 lung cancers by analyzing reverse transcription-polymerase chain reaction-single strand conformation polymorphism (RT-PCR-SSCP) to ascertain the association between p53 mutations and smoking. Twenty-five (47%) of 53 lung cancers carried p53 mutations. A discriminant analysis showed that the Brinkman index (0.156) and gender (0.140) significantly influenced p53 mutations. Furthermore, there was a dose-response relationship between the quantity of cigarettes consumed and the frequency of p53 mutations in lung cancer patients (P < 0.001). In patients with adenocarcinoma, the frequency of p53 mutations correlated with the amount of the tobacco smoked (P < 0.05). We suggest that the p53 gene is a target of particular carcinogen in tobacco smoke.
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Affiliation(s)
- K Kondo
- Second Department of Surgery, School of Medicine, University of Tokushima, Japan
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48
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Okamoto H, Iwamoto H, Tsuzuki H, Teraoka H, Yoshida N. An improved method for large-scale purification of recombinant human glucagon. J Protein Chem 1995; 14:521-6. [PMID: 8561848 DOI: 10.1007/bf01886878] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Glucagon was expressed in Escherichia coli as a fusion protein including the glucagon sequence [Ishizaki et al. (1992), Appl. Microbiol. Biotechnol. 36, 483-486]. The high-level expression of a protein in E. coli often results in an insoluble aggregate called an inclusion body containing a fusion protein. In our previous report [Yoshikawa et al. (1992), J. Protein Chem. 11, 517-525], we solubilized this inclusion body by using guanidinium chloride. However, the existence of denaturant caused problems such as a low proteolytic activity for transforming the fusion protein into glucagon and complicated purification methods. We tried to improve the method to enable large-scale purification. At alkaline pH, the inclusion body could be solubilized to a high concentration and cleaved by amino acid-specific endopeptidases. By utilizing isoelectric precipitations as a new economical purification method for glucagon from intermediates, the glucagon obtained was shown to be over 99.5% pure by analytical RP-HPLC. The yield was almost equal that of our previous method, and the glucagon produced was chemically and biochemically equivalent to natural glucagon.
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Affiliation(s)
- H Okamoto
- Shionogi Research Laboratories, Shionogi & Co., Osaka, Japan
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49
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Manabe Y, Saito T, Tsuzuki H, Igarashi M, Yamagishi T, Saito H. Effect of dextran on gentamicin-induced ototoxicity. ORL J Otorhinolaryngol Relat Spec 1995; 57:111-4. [PMID: 7541520 DOI: 10.1159/000276722] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 01/25/2023]
Abstract
The effect of low-molecular-weight dextran (DX) on gentamicin (GM)-induced ototoxicity was examined in guinea pigs. GM (100 mg/kg) was administered intramuscularly for 10, 12 and 14 days with or without DX. Cochlear damage was evaluated by compound action potential thresholds and surface preparation after fixation with osmium tetroxide. The percentage of missing outer hair cells was significantly increased by combined administrations of GM with DX. However, there was no significant difference in blood urea nitrogen levels in guinea pigs with or without DX. When aminoglycoside antibiotics and DX are administered together, attention should be paid not only to nephrotoxicity but also to ototoxicity.
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Affiliation(s)
- Y Manabe
- Department of Otolaryngology, Fukui Medical School, Japan
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50
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Tanida N, Fukui Y, Tsuzuki H, Sugimoto T, Miki H, Mutsuda T, Kita S, Kobayashi K, Hirose C, Seki K. [A case of an intrapulmonary lymph node indistinguishable from carcinoma of the lung by CT]. Kyobu Geka 1995; 48:239-41. [PMID: 7897907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A 64-year-old female was referred to our hospital for further examination of a coin lesion, 8 mm in diameter, superimposed on the right ninth posterior rib. CT revealed a nodule, close to the minor fissure, with spiculation, which seemed to be connected with the pulmonary vein. Since the bronchofiberscopic examination revealed no histological diagnosis, the exploratory thoracotomy was performed. The nodule was found to be a 10 x 7 x 5 mm black mass located subpleural at the minor fissure. Histologically, it was recognized as a lymph node with anthracosis and silicotic nodules.
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Affiliation(s)
- N Tanida
- Department of Surgery, National Sanatorium Higashi-Tokushima Hospital, Japan
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