The in vitro radiosensitizing effects of docetaxel have been reported, but the DNA damage caused by the irradiation after docetaxel exposure has not been investigated. In this study, the authors attempted to evaluate the radiosensitizing effects in terms of cell survival and DNA single-strand breaks in a human ovarian adenocarcinoma cell line (known as line BG-1) and a human cervical squamous cell carcinoma cell line (known as line SiHa). The cell lines were exposed to various concentrations of docetaxel (from 2.27 x 10(-3) to 2.27 microg/ml) to investigate the cytocidal effects by colony-formation assay. DNA single-strand breaks after exposure to 2.27 microg/ml of docetaxel for 30 min or 100 min were measured by the alkaline-elution assay. The remarkable cytotoxicity of docetaxel followed by irradiation was observed when concentrations were greater than 2.27 x 10(-2) microg/ml in both cell lines. The combination of docetaxel and irradiation appears to be supraadditive. The DNA single-strand breaks induced by the irradiation were enhanced in both cell lines (BG-1; P < 0.01, SiHa; P < 0.05). The synergistic cytocidal effect cannot be explained quantitatively only by the single-strand breaks.
en-copyright= kn-copyright= en-aut-name=ArakiShinako en-aut-sei=Araki en-aut-mei=Shinako kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MiyagiYasunari en-aut-sei=Miyagi en-aut-mei=Yasunari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KawanishiKunihiro en-aut-sei=Kawanishi en-aut-mei=Kunihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=YamamotoJunko en-aut-sei=Yamamoto en-aut-mei=Junko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=HongoAtsushi en-aut-sei=Hongo en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=KodamaJunichi en-aut-sei=Kodama en-aut-mei=Junichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=YoshinouchiMitsuo en-aut-sei=Yoshinouchi en-aut-mei=Mitsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=KudoTakafumi en-aut-sei=Kudo en-aut-mei=Takafumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama Red Cross General Hospital affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University affil-num=6 en-affil= kn-affil=Okayama University affil-num=7 en-affil= kn-affil=Okayama University affil-num=8 en-affil= kn-affil=Okayama University en-keyword=docetaxel kn-keyword=docetaxel en-keyword=DNA single-strand break kn-keyword=DNA single-strand break en-keyword=radiosensitizer kn-keyword=radiosensitizer END start-ver=1.4 cd-journal=joma no-vol=53 cd-vols= no-issue=5 article-no= start-page=201 end-page=208 dt-received= dt-revised= dt-accepted= dt-pub-year=1999 dt-pub=199910 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Effect of cisplatin on cell death and DNA crosslinking in rat mammary. Adenocarcinoma in vitro. en-subtitle= kn-subtitle= en-abstract= kn-abstract=The pharmacodynamic effects of cisdiamminedichloroplatinum(II) (CDDP) in vitro have been reported, but the dosage and exposure time in vitro have not been based on clinical observations of the drug's actions in vivo. In this study, the authors attempted to evaluate the pharmacodynamic effects of CDDP in vitro in terms of cell survival and DNA crosslinking by simulating unbound CDDP administration at varying concentrations to a rat mammary adenocarcinoma line (known as line 66). CDDP exposure was conducted by both constant concentration procedures and a simulated in vivo procedure. Colony formation assay for the surviving fraction and alkaline elution assay for DNA crosslink measurement were performed in order to evaluate the pharmacodynamics of CDDP. Cell survival was a function of the area under the drug concentration time curve (AUC) of unbound CDDP (R2 = 0.77, P < 0.002) for all drug exposure procedures as analyzed by the analysis of covariance test. There was a strong correlation between the surviving fraction and the crosslink index of the total amount of DNA crosslinks (R2 = 0.85, P < 0.0005). Both the total amount of DNA-DNA crosslinks and the DNA-protein crosslinks, of which the latter were dominant, were affected not by the exposure procedures, but by the AUC value (P < 0.002). The thresholds of cytocidal effect were 1.59 mg.h/l for the AUC and 0.008 for the crosslink index. The pharmacodynamic effects in vitro by simulated in vivo exposure were identical to those of constant.
en-copyright= kn-copyright= en-aut-name=YamamotoJunko en-aut-sei=Yamamoto en-aut-mei=Junko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=MiyagiYasunari en-aut-sei=Miyagi en-aut-mei=Yasunari kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=KawanishiKunihiro en-aut-sei=Kawanishi en-aut-mei=Kunihiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=YamadaShinako en-aut-sei=Yamada en-aut-mei=Shinako kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=MiyagiYuji en-aut-sei=Miyagi en-aut-mei=Yuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=KodamaJunichi en-aut-sei=Kodama en-aut-mei=Junichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=YoshinouchiMitsuo en-aut-sei=Yoshinouchi en-aut-mei=Mitsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=KudoTakafumi en-aut-sei=Kudo en-aut-mei=Takafumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama University affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University affil-num=6 en-affil= kn-affil=Okayama University affil-num=7 en-affil= kn-affil=Okayama University affil-num=8 en-affil= kn-affil=Okayama University en-keyword=pharmacodynamics kn-keyword=pharmacodynamics en-keyword=pharmacokinetics kn-keyword=pharmacokinetics en-keyword=simulation kn-keyword=simulation en-keyword=cisplatin kn-keyword=cisplatin en-keyword=crosslink kn-keyword=crosslink END start-ver=1.4 cd-journal=joma no-vol=48 cd-vols= no-issue=5 article-no= start-page=249 end-page=255 dt-received= dt-revised= dt-accepted= dt-pub-year=1994 dt-pub=199410 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Immunohistochemical analysis of P-glycoprotein expression in diverse histological types of epithelial ovarian tumors. en-subtitle= kn-subtitle= en-abstract= kn-abstract=P-glycoprotein is a transmembrane protein which acts as an energy-dependent drug efflux pump for a variety of anti-cancer drugs. The mdr-1 gene which encodes P-glycoprotein was successfully cloned in 1986. To investigate P-glycoprotein expression in diverse ovarian tumors, including benign, low malignant potential and malignant, immunohistochemical study was done using a monoclonal antibody (C 219). Overall, 8 out of the 59 epithelial ovarian tumors (13.6%) expressed P-glycoprotein. It was noted that 5 of the 12 mucinous tumors were found to express P-glycoprotein, while none of the 31 serous tumors were immunohistochemically positive. In 10 malignant ovarian tumors, P-glycoprotein immunostaining was examined both prior to and after chemotherapy. Nine of them did not express any P-glycoprotein before or after chemotherapy. However, one tumor expressed P-glycoprotein after six courses of multidrug resistance-related drug administration. These findings indicate that P-glycoprotein expression is not so common in ovarian tumors, regardless of their malignant potential. Nevertheless, the results suggest a strong association between P-glycoprotein expression and certain histological cell types in epithelial ovarian tumors. It is also possible that P-glycoprotein appears as a result of chemotherapy, but such a phenomenon can not occur unless chemotherapy is administered at high doses for a long period of time.
en-copyright= kn-copyright= en-aut-name=KodamaJunichi en-aut-sei=Kodama en-aut-mei=Junichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=HayaseRyoji en-aut-sei=Hayase en-aut-mei=Ryoji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=YoshinouchiMitsuo en-aut-sei=Yoshinouchi en-aut-mei=Mitsuo kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OkudaHiroyuki en-aut-sei=Okuda en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=KudoTakafumi en-aut-sei=Kudo en-aut-mei=Takafumi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= affil-num=1 en-affil= kn-affil=Okayama University affil-num=2 en-affil= kn-affil=Okayama University affil-num=3 en-affil= kn-affil=Okayama Univeristy affil-num=4 en-affil= kn-affil=Okayama University affil-num=5 en-affil= kn-affil=Okayama University en-keyword=P-glycoprotein kn-keyword=P-glycoprotein en-keyword=epithelial ovarian tumor kn-keyword=epithelial ovarian tumor en-keyword=multidrug resistance kn-keyword=multidrug resistance en-keyword=immunohistochemistry kn-keyword=immunohistochemistry END start-ver=1.4 cd-journal=joma no-vol=62 cd-vols= no-issue=4 article-no= start-page=251 end-page=259 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=200808 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Immunohistochemical Evaluation of Insulin-like Growth Factor I Receptor Status in Cervical Cancer Specimens en-subtitle= kn-subtitle= en-abstract= kn-abstract=The insulin-like growth factor I receptor (IGF-IR) is exceptionally overexpressed in many cervicalcancer-derived cell lines. It is postulated that a decrease of p53 protein levels due to human papillomavirus (HPV) infection may contribute to the up-regulation of IGF-IR expression in cervical cancer cells because transcription of IGF-IR is strictly down-regulated by p53. To evaluate this fact in clinical cervical cancer specimens, we checked the expression levels and activated status of IGF-IR by immunohistochemistry. Formalin-fixed and paraffin-embedded specimens obtained by conization or hysterectomy were stained with anti-IGF-IR and with an antibody recognizing phosphorylated tyrosine at its c-terminus. The expression levels of IGF-IR were significantly high in cervical intraepithelial neoplasia (CIN) III and invasive cancer specimens. Phosphorylation of IGF-IR was promoted in all CIN and invasive cancer specimens, and its intensity was related to the promotion of lesions. Interestingly, IGF-IR overexpression was missing in the basal layer of CIN I and II lesions, whereas it was evenly distributed in CIN III and invasive cancer lesions. This IGF-IR overexpression pattern may be utilized in the diagnosis of HPV infection status in CIN lesions.
en-copyright= kn-copyright= en-aut-name=KuramotoHiroyuki en-aut-sei=Kuramoto en-aut-mei=Hiroyuki kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=HongoAtsushi en-aut-sei=Hongo en-aut-mei=Atsushi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=LiuYi-xuan en-aut-sei=Liu en-aut-mei=Yi-xuan kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= en-aut-name=OjimaYojiro en-aut-sei=Ojima en-aut-mei=Yojiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=4 ORCID= en-aut-name=NakamuraKeiichiro en-aut-sei=Nakamura en-aut-mei=Keiichiro kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=5 ORCID= en-aut-name=SekiNoriko en-aut-sei=Seki en-aut-mei=Noriko kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=6 ORCID= en-aut-name=KodamaJunichi en-aut-sei=Kodama en-aut-mei=Junichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=7 ORCID= en-aut-name=HiramatsuYuji en-aut-sei=Hiramatsu en-aut-mei=Yuji kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=8 ORCID= affil-num=1 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=2 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=3 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=4 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=5 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=6 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=7 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences affil-num=8 en-affil= kn-affil=Department of Obstetrics and Gynecology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences en-keyword=insulin-like growth factor I receptor kn-keyword=insulin-like growth factor I receptor en-keyword=cervical cancer kn-keyword=cervical cancer en-keyword=human papillomavirus kn-keyword=human papillomavirus en-keyword=tyrosil phosphorylation kn-keyword=tyrosil phosphorylation END start-ver=1.4 cd-journal=joma no-vol=120 cd-vols= no-issue=1 article-no= start-page=69 end-page=75 dt-received= dt-revised= dt-accepted= dt-pub-year=2008 dt-pub=20080501 dt-online= en-article= kn-article= en-subject= kn-subject= en-title=Standard treatment of ovarian， endometrial and cervical cancers kn-title=Z 卵巣癌・子宮体癌・子宮頸癌の標準的治療 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name=KodamaJunichi en-aut-sei=Kodama en-aut-mei=Junichi kn-aut-name=児玉順一 kn-aut-sei=児玉 kn-aut-mei=順一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学大学院医歯薬学総合研究科 産科・婦人科学 en-keyword=卵巣癌 kn-keyword=卵巣癌 en-keyword=子宮体癌 kn-keyword=子宮体癌 en-keyword=子宮頸癌 kn-keyword=子宮頸癌 en-keyword=標準的治療 kn-keyword=標準的治療 en-keyword=ガイドライン kn-keyword=ガイドライン END start-ver=1.4 cd-journal=joma no-vol= cd-vols= no-issue= article-no= start-page= end-page= dt-received= dt-revised= dt-accepted= dt-pub-year=1995 dt-pub=19951231 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=婦人科腫瘍におけるP糖蛋白質の発現とその意義 en-subtitle= kn-subtitle= en-abstract= kn-abstract= en-copyright= kn-copyright= en-aut-name= en-aut-sei= en-aut-mei= kn-aut-name=児玉順一 kn-aut-sei=児玉 kn-aut-mei=順一 aut-affil-num=1 ORCID= affil-num=1 en-affil= kn-affil=岡山大学 END