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Baseball pitching kinematics,joint loads,and injury prevention

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Journal of Sport and Health Science 2012年第2期1卷 80-91页

作者： sakiko Oyama Interdisciplinary Program of Human Movement Science Department of Exercise and Sport ScienceUniversity of North Carolina at Chapel HillChapel HillNC 27599USA

There is a need for the prevention of upper extremity injuries that affect a large number of competitive baseball *** available evidence alludes to three possible ways to prevent these injuries:1) regulation of unsafe participation factors,2) implementation of exercise intervention to modify suboptimal physical characteristics,and 3) instructional intervention to correct improper pitching *** these three strategies,instruction of proper pitching technique is under-explored as a method of injury ***,the purpose of this review was to explore the utility of pitching technique instruction in prevention of pitching-related upper extremity injuries by presenting evidence linking pitching technique and pitching-related upper extremity injuries,as well as identifying considerations and potential barriers in pursuing this approach to prevent *** kinematic parameters measured using laboratory-based motion capture system have been linked to excessive joint loading,and thus pitching-related upper extremity *** we gain more knowledge about the influence of pitching kinematics on joint loading and injury risk,it is important to start exploring ways to modify pitching technique through instruction and feedback while considering the specific skill components to address,mode of instruction,target population,duration of program,and ways to effectively collaborate with coaches and parents.

关键词： Athletic training Baseball Instruction Intervention Pitching biomechanics Sport medicine

Amino Acid Export in Plants： A Missing Link in Nitrogen Cycling

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Molecular Plant 2011年第3期4卷 453-463页

作者： sakiko Okumoto Guillaume Pilot 549 Latham Hall Virginia Tech Blacksburg VA 24061 USA 209 Latham Hall Virginia Tech Blacksburg VA 24061 USA

The export of nutrients from source organs to parts of the body where they are required （e.g. sink organs） is a fundamental biological process. Export of amino acids, one of the most abundant nitrogen species in plant long-distance transport tissues （i.e. xylem and phloem）, is an essential process for the proper distribution of nitrogen in the plant. Phys- iological studies have detected the presence of multiple amino acid export systems in plant cell membranes. Yet, surpris- ingly little is known about the molecular identity of amino acid exporters, partially due to the technical difficulties hampering the identification of exporter proteins. In this short review, we will summarize our current knowledge about amino acid export systems in plants. Several studies have described plant amino acid transporters capable of bi-directional, facilitative transport, reminiscent of activities identified by earlier physiological studies. Moreover, recent expansion in the number of available amino acid transporter sequences have revealed evolutionary relationships between amino acid exporters from other organisms with a number of uncharacterized plant proteins, some of which might also function as amino acid exporters. In addition, genes that may regulate export of amino acids have been discovered. Studies of these putative transporter and regulator proteins may help in understanding the elusive molecular mechanisms of amino acid export in plants.

关键词： Nitrogen amino acids membrane transport.

Specific endoscopic features of ulcerative colitis complicated by cytomegalovirus infection

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World Journal of Gastroenterology 2010年第10期16卷 1245-1251页

作者： Hideyuki Suzuki Jun Kato Motoaki Kuriyama sakiko Hiraoka Kenji Kuwaki Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical Sciences

AIM:To identify specific colonoscopic findings in patients with ulcerative colitis (UC) complicated by cyto-megalovirus (CMV) ***: Among UC patients who were hospitalized due to exacerbation of symptoms, colonoscopic findings were compared between 15 CMV-positive patients and 58 CMV-negative patients. CMV infection was determined by blood test for CMV antigenemia. Five aspects of mucosal changes were analyzed (loss of vascular pattern, erythema, mucosal edema, easy bleeding, and mucinous exudates) as well as five aspects of ulcerative change (wide mucosal defect, punched-out ulceration, longitudinal ulceration, irregular ulceration, and cobble-stone-like appearance). Sensitivity, specificity, positive predictive value, and negative predictive value of each finding for CMV positivity were ***: The sensitivity of irregular ulceration for positive CMV was 100%. The specificity of wide mucosal defect was 95%. Punched-out ulceration and lon-gitudinal ulceration exhibited relatively high sensitivity and specificity (more than 70% for each).CONCLUSION:Specific colonoscopic findings in patients with UC complicated by CMV infection were identified. These findings may facilitate the early diagnosis of CMV infection in UC patients.

关键词： Cytomegalovirus Endoscopic findings Ulcerative colitis

Prediction of flare-ups of ulcerative colitis using quantitative immunochemical fecal occult blood test

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World Journal of Gastroenterology 2010年第9期16卷 1110-1114页

作者： Motoaki Kuriyama Jun Kato Koji Takemoto sakiko Hiraoka Hiroyuki Okada Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistryand Pharmaceutical Sciences

AIM:To examine the feasibility of predicting the flareup of ulcerative colitis (UC) before symptoms emerge using the immunochemical fecal occult blood test (IFOBT).METHODS:We prospectively measured fecal hemoglobin concentrations in 78 UC patients using the I-FOBT every 1 or 2 ***:During a 20 mo-period,823 fecal samples from 78 patients were *** median concentration of fecal hemoglobin was 41 ng/mL (range:0-392 500 ng/mL).There were three types of patients with regard to the correlation between I-FOBT and patient symptoms;the synchronous transition type with symptoms (44 patients),the unrelated type withsymptoms (19 patients),and the flare-up predictive type (15 patients).In patients with the flare-up predictive type,the values of I-FOBT were generally low during the study period with stable *** to four weeks before the flare-up of symptoms,the I-FOBT values were ***,in these patients,I-FOBT could predict the flare-up before symptoms ***:Flare-up could be predicted by I-FOBT in approximately 20% of UC *** results warrant periodical I-FOBT in UC patients.

关键词： Flare-ups Immunochemical fecal occult blood test Inflammatory bowel disease Prediction Ulcerative colitis

Development of a competitive enzyme-linked immunosorbent assay for therapeutic drug monitoring of afatinib

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Journal of Pharmaceutical Analysis 2019年第1期9卷 49-54页

作者： Rintaro Sogawa Tetsuya Saita Yuta Yamamoto sakiko Kimura Yutaka Narisawa Shinya Kimura Masashi Shin Department of Pharmacy Saga University Hospital Applied Life Science Department Faculty of Biotechnology and Life Science Sojo University Division of Hematology Respiratory Medicine and Oncology Department of Internal Medicine Faculty of Medicine Saga University

Afatinib is an oral tyrosine kinase inhibitor(TKI) approved for treating advanced non-small cell lung cancer. It is necessary to develop a simple quantification method for TKIs in order to facilitate therapeutic drug monitoring(TDM) in clinical settings. This study sought to develop a simple and sensitive competitive enzyme-linked immunosorbent assay(ELISA) to quantify afatinib in plasma for routine pharmacokinetic applications. An anti-afatinib antibody was obtained using(S)-N-4-(3-chloro-4-fluorophenyl)-7-(tetrahydrofuran-3-yloxy)-quinazoline-4,6-diamine(CTQD), which has the same substructure as afatinib, as a hapten. Enzyme labeling of afatinib with horseradish peroxidase was similarly performed using CTQD. A simple competitive ELISA for afatinib was developed based on the principle of direct competition between afatinib and the enzyme marker for the anti-afatinib antibody, which had been immobilized on the plastic surface of a microtiter plate. Plasma afatinib concentrations below the limit of quantification of 30 pg/mL were reproducibly measurable. Also, the values of plasma afatinib levels measured from 20 patients were comparable with those measured by high-performance liquid chromatography, and there was a strong correlation between the values determined by both methods(Y=0.976 X – 0.207, r=0.975). As indicated by its specificity and sensitivity, this newly developed ELISA for afatinib is an important tool for TDM and studies of the pharmacokinetics of afatinib.

关键词： Afatinib Enzyme-linked immunosorbent assay Therapeutic drug monitoring Tyrosine-kinase inhibitor

CO_2 insufflation for potentially diffi cult colonoscopies: Effi cacy when used by less experienced colonoscopists

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World Journal of Gastroenterology 2009年第41期15卷 5186-5192页

作者： Toshio Uraoka Jun Kato Motoaki Kuriyama Keisuke Hori Shin Ishikawa Keita Harada Koji Takemoto sakiko Hiraoka Hideyuki Fujita Joichiro Horii Yutaka Saito Kazuhide Yamamoto Department of Endoscopy Okayama University Hospital Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Division of Endoscopy National Cancer Center Hospital

AIM： To clarify the effectiveness of CO2 insufflation in potentially difficult colonoscopy cases, particularly in relation to the experience level of colonoscopists. METHODS： One hundred twenty potentially difficult cases were included in this study, which involved females with a low body mass index and patients with earlier abdominal and/or pelvic open surgery or previously diagnosed left-side colon diverticulosis. Patients receiving colonoscopy examinations without sedation using a pediatric variable-stiffness colonoscope were divided into two groups based on either CO2 or standard air insuffiation. Both insufflation procedures were also evaluated according to the experience level of the respective colonoscopists who were divided into an experienced colonoscopist （EC） group and a less experienced colonoscopist （LEC） group. Study measurements included a 100-mm visual analogue scale （VAS） for patient pain during and after colonoscopy examinations, in addition to insertion to the cecum and withdrawal times. RESULTS： Examination times did not differ, however, VAS scores in the CO2 group were significantly better than in the air group （P〈 0.001, two-way ANOVA） from immediately after the procedure and up to 2 h later. There were no significant differences between either insufflation method in the EC group （P = 0.29）, however, VAS scores for CO2 insufflation were significantly better than air insufflation in the LEC group （P = 0.023） immediately after colonoscopies and up to 4 h afterwards. CONCLUSION： CO2 insufflation reduced patient pain after colonoscopy in potentially difficult cases when performed by LECs.

关键词： CO2 insufflation Colonoscopy Difficult colonoscopy Experienced colonoscopist Training

Ulcerative colitis patients in clinical remission demonstrate correlations between fecal immunochemical test results, mucosal healing, and risk of relapse

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World Journal of Gastroenterology 2016年第21期22卷 5079-5087页

作者： Asuka Nakarai Jun Kato sakiko Hiraoka Shiho Takashima Daisuke Takei Toshihiro Inokuchi Yuusaku Sugihara Masahiro Takahara Keita Harada Hiroyuki Okada Department of Gastroenterology and Hepatology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Second Department of Internal Medicine Wakayama Medical University Department of Endoscopy Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences

AIM: To assess the risk of relapse in ulcerative colitis (UC) patients in clinical remission using mucosal status and fecal immunochemical test (FIT) ***: The clinical outcomes of 194 UC patients in clinical remission who underwent colonoscopy were based on evaluations of Mayo endoscopic subscores (MESs) and FIT ***: Patients with an MES of 0 (n = 94, 48%) showed a ten-fold lower risk of relapse than those with an MES of 1-3 (n = 100, 52%) (HR = 0.10, 95%CI: 0.05-0.19). A negative FIT result (fecal hemoglobin concentrations ≤ 100 ng/mL) was predictive of patients with an MES of 0, with a sensitivity of 0.94 and a specific of 0.76. Moreover, patients with a negative FIT score had a six-fold lower risk of clinical relapse than those with a positive score (HR = 0.17, 95%CI: 0.10-0.28). Inclusion of the distinguishing parameter, sustaining clinical remission > 12 mo, resulted in an even stronger correlation between negative FIT results and an MES of 0 with respect to the risk of clinical relapse (HR = 0.11, 95%CI: 0.04-0.23).CONCLUSION: Negative FIT results one year or more after remission induction correlate with complete mucosal healing (MES 0) and better prognosis. Performing FIT one year after remission induction may be useful for evaluating relapse risk.

关键词： Ulcerative colitis Clinical remission Mucosal healing Mayo endoscopic subscore Quantitative fecal immunochemical test

Long-term follow-up of ulcerative colitis patients treated on the basis of their cytomegalovirus antigen status

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World Journal of Gastroenterology 2014年第2期20卷 509-517页

作者： Toshihiro Inokuchi Jun Kato sakiko Hiraoka Hideyuki Suzuki Asuka Nakarai Tomoko Hirakawa Mitsuhiro Akita Sakuma Takahashi Keita Harada Hiroyuki Okada Kazuhide Yamamoto Department of Gastroenterology and Hepatology Okayama University Graduate School of MedicineDentistry and Pharmaceutical SciencesOkayama 700-8558Japan Second Department of Internal Medicine Wakayama Medical UniversityWakayama 641-0012Japan

AIM:To clarify the impact of cytomegalovirus(CMV)activation and antiviral therapy based on CMV antigen status on the long-term clinical course of ulcerative colitis(UC)***:UC patients with flare-up were divided into CMV-positive and-negative groups according to the CMV antigenemia *** main treatment strategy provided for the patients in the CMV-positive group comprised a dose reduction of corticosteroids and administration of ***:The median number of days to initial remission was significantly greater for the patients in the CMV-positive group(21 d vs 16 d,P=0.009).However,the relapse rate after remission and colectomy rate during more than 30 mo of observation did not differ between the two *** analysis revealed that administration of ganciclovir was the only independent factor for avoiding colectomy in patients of the CMV-positive ***:CMV antigen status did not significantly affect the long-term prognosis in UC patients under treatment with appropriate antiviral therapy.

关键词： Ulcerative colitis Cytomegalovirus Cytomegalovirus antigenemia assay

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

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Materials Sciences and Applications 2017年第2期8卷 209-222页

作者： Yasuhiro Shirahata Takeo Oku sakiko Fukunishi Kazufumi Kohno Department of Materials Science the University of Shiga Prefecture Shiga Japan Frontier Materials Laboratories Osaka Gas Chemicals Co. Ltd. Osaka Japan

Perovskite-type photovoltaic devices with polysilane hole transport layers were fabricated by a spin-coating method. In the present work, poly(methyl phenylsilane) (PMPS) and decaphenylcyclopentasilane (DPPS) were used as the hole transport layers. First, structural and optical properties of the PMPS and DPPS films were investigated, and the as-prepared PMPS and DPPS films were amorphous. Optical absorption spectra of the amorphous PMPS and DPPS showed some marked features due to the nature of polysilanes. Then, microstructures, optical and photovoltaic properties of the perovskite-type photovoltaic devices with polysilane hole transport layers were investigated. Current density-voltage characteristics and incident photon to current conversion efficiency of the photovoltaic devices with the polysilane layers showed different photovoltaic performance each other, attributed to molecular structures of the polysilanes and Si content in the present hole transport layers.

关键词： Polysilane Hole Transport Layer Perovskite Photovoltaic Device