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Effect of Collagen Type I or Human Fibronectin on Imatinib Cytotoxicity in Oral Squamous Cell Carcinoma

Pharmacology & Pharmacy 2016年第7期7卷 255-263页

作者： Masahiko Morioka Mai Hazekawa Tomoyo Kawakubo-Yasukochi Takuya Nishinakagawa seiji nakamura Manabu Nakashima Department of Immunological and Molecular Pharmacology Faculty of Pharmaceutical Science Fukuoka University Fukuoka Japan Section of Oral and Maxillofacial Oncology Division of Maxillofacial Diagnostic and Surgical Sciences Faculty of Dental Science Kyushu University Fukuoka Japan

Extracellular matrix (ECM) components are critical for all aspects of cell proliferation, adhesion, and morphological alteration. Recent progress has yielded multiple molecular drugs that specifically target gene products which are expressed at high levels in tumor cells. We investigated whether the sensitivity of tumor cells to molecular target drugs could be altered when cells were cultured on surfaces with various coating conditions such as lysine, laminin, Matrigel, collagen type I, and human fibronectin (HFN). This study evaluates the IC50 values of imatinib in oral squamous cell carcinoma (OSCC) cell lines when cells are cultured on plates coated with ECM components such as collagen type I and HFN. Four OSCC cell lines—SQUU-A, SQUU-B, SAS, and NA— are used. Cell proliferation was assessed using WST-8 reagent. Collagen type I and HFN significantly enhanced OSCC cell proliferation compared with control. Imatinib cytotoxicity was demonstrated following culture of OSCCs in culture plates coated with collagen type I or HFN. However, there were no significant changes in imatinib IC50 values between collagen type I and HFN. These results indicate that some molecular target drugs exhibit cancer cell cytotoxicity without being influenced by cell environment factors such as the ECM. These results may aid in the search for molecular target drugs to apply in the clinical chemotherapy of OSCC.

关键词： Collagen Type I Human Fibronectin Imatinib Cytotoxicity Oral Squamous Cell Carcinoma

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Evaluation of an oral moisture-checking device for screening dry mouth

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Open Journal of Stomatology 2013年第8期3卷 440-446页

作者： Yosuke Fukushima Tetsuya Yoda Shoichiro Kokabu Ryuichiro Araki Tsubasa Murata Yoshimasa Kitagawa Ken Omura Shuji Toya Kayoko Ito Saori Funayama Hiroshi Iwabuchi Kazuhiro Asano Yutaka Imai Akihide Negishi Satoshi Yokoo Goichi Matsumoto Eiro Kubota Hideki Watanabe Mikio Kusama Kojiro Onizawa Takuya Goto seiji nakamura Ryuichi Nakazawa Kiyoshi Harada Takashi Fujibayashi Community Health Science Center Saitama Medical University Saitama Japan Department of Dentistry and Oral Surgery Tochigi National Hospital Tochigi Japan Department of Oral and Maxillofacial Surgery Division of Medicine Interdisciplinary Graduate School of Medicine and Engi- neering Univer-sity of Yamanashi Kofu and Tamaho Japan Department of Oral and Maxillofacial Surgery Dokkyo Medical University School of Medicine Tochigi Japan Department of Oral and Maxillofacial Surgery Faculty of Medicine Sai-tama Medical University Saitama Japan Department of Oral and Maxillofacial Surgery Institute of Clinical Medicine University of Tsukuba Tsukuba Japan Department of Oral and Maxillofacial Surgery Jichi Medical University Tochigi Japan Department of Oral and Maxillofacial Surgery Kanagawa Dental College Yokosuka Japan Department of Stomatology and Oral Surgery Gunma University Graduate School of Medicine Maebashi Japan Division of Gereatric Dentistry Niigata University Medical & Dental Hospital Niigata Japan Oral and Maxillofacial Surgery Dry Mouth Clinic The Nippon Dental University Niigata Hospital Niigata Japan Oral Diagnosis and Medicine Department of Oral Pathobiological Science Graduate School of Dental Medicine Hokkaido University Sapporo Japan Oral Surgery Department of Oral Restitution Division of Oral Health Sciences Graduate School Tokyo Medical and Dental University Tokyo Japan Section of Oral and Maxillofacial Oncology Division of Maxillofacial Diagnostic and Surgical Sciences Faculty of Dental Science Kyushu University Fukuoka Japan

Objective: This multicenter clinical study was to assess the clinical usability of an oral moisture-checking device in detecting the dry mouth patients and evaluating the optimal measurement site. Materials and Methods: The study group comprised 250 patients with dry mouth and 241 healthy volunteer subjects at 13 medical centers. This device was used to measure the moisture degrees of the lingual mucosa and the buccal mucosa. Subjective oral dryness, objective oral dryness, and saliva flow rates were also compared between the two groups. For statistical analysis, receiver-operating characteristic analysis was performed to calculate the area under the curve (AUC). Results: The moisture degree of the lingual mucosa was significantly lower in the dry mouth group (27.2 ± 4.9) than that in the healthy group (29.5 ± 3.1, AUC = 0.653). When a lingual mucosa moisture degree of 31.0 or higher was defined as normal, less than 27.0 as dry mouth, and 27.0 to less than 31.0 as borderline zone of dry mouth, both the sensitivity and the specificity for the diagnosis of dry mouth were close to 80%. Conclusion: These results suggest that the oral moisture-checking device is a usable screening device for dry mouth.

关键词： Dry Mouth Oral Moisture-Checking Device ROC Analysis

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Aberrant gene methylation in the peritoneal fluid is a risk factor predicting peritoneal recurrence in gastric cancer

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World Journal of Gastroenterology 2010年第3期16卷 330-338页

作者： Masatsugu Hiraki Yoshihiko Kitajima seiji Sato Jun nakamura Kazuyoshi Hashiguchi Hirokazu Noshiro Kohji Miyazaki Department of Surgery Saga University Faculty of Medicine

AIM:To investigate whether gene methylation in the peritoneal fluid (PF) predicts peritoneal recurrence in gastric cancer ***: The gene methylation of CHFR (checkpoint with forkhead and ring finger domains), p16, RUNX3 (runt-related transcription factor 3), E-cadherin, hMLH1 (mutL homolog 1), ABCG2 (ATP-binding cassette, sub-family G, member 2) and BNIP3 (BCL2/adenovirus E1B 19 kDa interacting protein 3) were analyzed in 80 specimens of PF by quantitative methylation-specific polymerase chain reaction (PCR). Eighty patients were divided into 3 groups; Group A (n=35):the depth of cancer invasion was less than the muscularis propria; Group B (n=31): the depth of cancer invasion was beyond the muscularis propria. Both group A and B were diagnosed as no cancer cells in peritoneal cytology and histology; Group C (n=14): disseminated nodule was histologically diagnosed or cancer cells were cytologically defi ned in the peritoneal ***: The positive rates of methylation in CHFR, E-cadherin and BNIP3 were significantly different among the 3 groups and increased in order of group A, B and C (0%,0% and 21% in CHFR, P<0.05; 20%, 45% and 50% in E-cadherin, P<0.05;26%,35% and 71% in BNIP3, P<0.05). In addition, the multigene methylation rate among CHFR, E-cadherin and BNIP3 was correlated with group A, B and C (9%,19% and 57%, P<0.001). Moreover, the prognosis was analyzed in group B, excluding 3 patients who underwent a non-curative resection. Two of the 5 patients with multigene methylation showed peritoneal recurrence after surgery, while those without or with a single gene methylation did not experience recurrence (P<0.05).CONCLUSION: This study suggested that gene methylation in the PF could detect occult neoplastic cells in the peritoneum and might be a risk factor for peritoneal metastasis.

关键词： Ascites Dissemination Gastric cancer Methylation Peritoneal fluid Quantitative methylation-specific polymerase chain reaction

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Practical applications and limitations of basalt discrimination diagrams

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Big Earth Data 2023年第4期7卷 1081-1093页

作者： Kentaro nakamura Frontier Research Center for Energy and Resources(FRCER) School of EngineeringThe University of TokyoTokyoJapan

Determining the tectonic setting of unknown volcanic rocks continues to be one of the key challenges in *** discrimination diagrams have been successfully employed due to their ease of use,recently,validation with big data has raised questions about their *** this study,the discrimination boundaries of Th/Yb versus(vs.)Nb/Yb and TiO2/Yb ***/Yb diagrams,which are the most used types of discrimination diagrams,were redefined based on a large amount of compiled data and support vector machine,a machine learning *** effectiveness of discrimination diagrams was verified,and the limitations and conditions when using them were *** results show that when using the Th/Yb ***/Yb diagram,only basalts with Th/Yb ratios higher than the discrimination boundary can be identified as volcanic arcs in *** contrast,a significant overlap occurs across boundaries in other cases when using these diagrams,particularly for enriched samples with Nb/Yb ratios higher than ***,when using these diagrams to determine the tectonic setting of unknown samples,their limitations must be considered when interpreting their results.

关键词： Discrimination diagram tectonic setting support vector machine big data large petrological databases

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Catalytic Asymmetric Reaction Using Fluorous Chiral BINAP

Catalytic Asymmetric Reaction Using Fluorous Chiral BINAP

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中国化学会第九届全国络合催化学术讨论会

作者： Yutaka nakamura seiji Takeuchi Niigata College of Pharmacy Niigata College of Pharmacy

＜正＞In 1994, Horvath and Rabai introduced a fluorous biphasic system（FBS） concept. Because it makes recovering and reusing the precious ligands very simple in homogeneous catalysis, it is attracting more and more attentions of chemists in the world wide. A number of reagents and catalysts bearing appropriate perfluoroalkyl substiruents have been prepared and used in fluorous biphase chemistry. However, only a few reports have been published on asymmetric reactions using fluorous catalysts. The main reason is probably due to the lack of chiral fluorous ligands available such as BINAP.

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Temporal variation in modal properties of a base-isolated building during an earthquake

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第1期11卷 1-8页

作者： Izuru TAKEWAKI Mitsuru nakamura Department of Urban and Environmental Engineering Graduate School of EngineeringKyoto University Technical Research Institute Obayashi Corporation

Temporal variation of dynamical modal properties of a base-isolated building is investigated using earthquake records in the building. A batch processing least-squares estimation method is applied to segment-wise time-series data. To construct an input-output system,an auto-regressive model with exogenous input (ARX) of second-order including a forgetting coefficient as a weighting coefficient is used for the estimation of modal parameters. The fundamental and second natural frequencies and the damping ratios of the fundamental and second natural modes of the base-isolated building are identified in the time domain. The identified results are consistent with the results obtained from the micro-tremor vibration data,forced-vibration test data and earthquake records in the present base-isolated building in the case of taking into account the amplitude-dependency of the isolators and viscous dampers. It is finally pointed out that several factors,e.g.,amplitude dependency of the isolator and damper system and special characteristics of the series-type viscous damper system,may be related complicatedly with the temporal variation in modal properties of the above-mentioned system.

关键词： System identification Shear building model Modal parameters Batch processing least-squares estimation method Forgetting coefficient Auto-regressive model with exogenous input (ARX) model

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Modern Biotechnology—Current Standards in Japan

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Biomedical and Environmental Sciences 2001年第1期14卷 40-43页

作者： YASUHISA nakamura DeputyDirector StandardsDivisionDepartmentofFoodSanitationMinistryofHealth

In the past few years, a new technology, biotechnology, has come into practical use internationally. It is prospective that application of biotechnology in the field of food production may lead to improved food quality and productivity.　　Modern biotechnology, through the use of recombinant DNA techniques, has been used for food production for some time now. Therefore, particular attention should be paid to the safety of foods and food additives produced by recombinant DNA techniques. For this reason, Japan set out the “Guideline for Safety Assessment of Foods and Food Additives Produced by Recombinant DNA Techniques” and “Guideline for Manufacturing Foods and Food Additives Produced by Recombinant DNA Techniques,” in 1991.

关键词： food additives food production Safety Assessment new technology food quality

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Special Issue for some new progress made by AMSS and Kyoto University on mathematical methods for informatics,engineering and management

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Journal of Systems Science & Complexity 2010年第1期23卷 1-2页

作者： Yoshimasa nakamura Kyoto University

This special issue presents some new progress in mathematical methods for informatics, engineeringand management that is expected to trigger thought and deepen further research. Forthis purpose, 14 papers were selected mainly from the invited talks at the CAS-Kyoto UniversityJoint Workshop on Mathematical Methods for Informatics, Engineering and Management,

关键词： Special Issue for some new progress made by AMSS and Kyoto University on mathematical methods for informatics,engineering and management

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Impairment of innate immune responses in cirrhotic patients and treatment by branched-chain amino acids

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World Journal of Gastroenterology 2014年第23期20卷 7298-7305页

作者： Ikuo nakamura Department of Gastroenterology Tokyo Medical UniversityTokyo 160-0023Japan Department of Gastroenterology Saitama Medical CenterJichi Medical UniversitySaitama 330-8503Japan

It has been reported that host defense responses, such as phagocytic function of neutrophils and natural killer (NK) cell activity of lymphocytes, are impaired in cirrhotic patients. This review will concentrate on the impairment of innate immune responses in decompensated cirrhotic patients and the effect of the treatment by branched-chain amino acids (BCAA) on innate immune responses. We already reported that phagocytic function of neutrophils was significantly improved by 3-mo BCAA supplementation. In addition, the changes of NK activity were also significant at 3 mo of supplementation compared with before supplementation. Also, Fisher’s ratios were reported to be significantly increased at 3 mo of BCAA supplementation compared with those before oral supplementation. Therefore, administration of BCAA could reduce the risk of bacterial and viral infection in patients with decompensated cirrhosis by restoring impaired innate immune responses of the host. In addition, it was also revealed that BCAA oral supplementation could reduce the risk of development of hepatocellular carcinoma in cirrhotic patients. The mechanisms of the effects will also be discussed in this review article.

关键词： Branched-chain amino acids Liver cirrhosis Innate immunity Natural killer cell activity of lymphocytes Phagocytic function of neutrophils

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The relationship between formate adsorption energy and electronic properties: A first principles density functional theory study

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Science China Chemistry 2009年第9期52卷 1427-1433页

作者： MORIKAWA Yoshitada nakamura Junji The Institute of Scientific and Industrial Research (ISIR) Osaka University Research Institute for Computational Sciences (RICS) National Institute of Advanced Industrial Science and Technology (AIST) Institute of Materials Science University of Tsukuba

First principles density functional theory calculations have been performed for the chemisorption of formate adsorption on some metal surfaces. For the most stable adsorption site of short-bridge, the calculated formate adsorption energy follows the order of Au(110) < Ag(110) < Cu(110) < Pd(110) < Pt(110) < Ni(110) < Rh(110) < Fe(100) < Mo(100), and a clear linear correlation exists between the adsorption energy and the corresponding heat of formation of metal oxides. Moreover, it has been found that the formate adsorption energy for the transition metals can be correlated well with its d-band center (εd), and the IB Group metals can be described by the coupling matrix element square (Vad2).

关键词： formate metal DFT-GGA slab model adsorption energy d-band center

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