alexa Antitumor Activity Of New Combination Chemotherapy With Irinotecan Hydrochloride And Nedaplatin Against Human Cervical Cancer Celllines
ISSN: 2157-7013

Journal of Cell Science & Therapy
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4th World Congress on Cell Science & Stem Cell Research
June 24-26, 2014 Valencia Conference Centre, Valencia, Spain

Kaichiro Yamamoto
Posters: J Cell Sci Ther
DOI: 10.4172/2157-7013.S1.029
Abstract
Introduction : Antitumor activity of combination chemotherapy with irinotecan hydrochloride (CPT-11) and nedaplatin was compared to that with CPT-11 and cisplatin. Methods: In vitro cytotoxicity of SN-38 (an active metabolite of CPT-11) in combination with nedaplatin or cisplatin was evaluated using three human cervical cancer cell lines (ME-180, CaSki and SiHa). Interactions between two drugs in combination were investigated using a simultaneous-exposure schedule and analyzed by the IC50-based isobologram method. In vivo antitumor effects of CPT-11 in combination with each platinums were studied using SiHa xenografts. Results: C50 values of nedaplatin against these three human cervicalcancer cell lines were about 2-fold as high as those of cisplatin, indicating somewhat weak cytotoxic effects of nedaplatin. Simultaneous exposure to SN-38 with each platinum preparation showed synergistic and additive effects against ME-180 and SiHa. While CPT-11, nedaplatin and cisplatin alone hardly showed any antitumor effects even at the maximum tolerated dose (MTD) levels, the combination chemotherapy with CPT-11 and nedaplatin or cisplatin resulted in significant anti tumor effects even at three-quarter MTD of CPT-11 combined with two-third MTD of platinum. All treatments were tolerable for mice, indicating that the combinations did not cause significant enhancement in toxicity. Discussion: In clinical application, nedaplatin causes a lower incidenceof nephropathy and does not require the replacement of a large volume of fluid, which is needed for cisplatin administration, facilitating treatment at the outpatient clinic. In addition, the incidences of digestive disorder, peripheral neuropathy and auditory disorder are lower. Conclusion: These findings suggest that the combination chemotherapy with CPT-11 and nedaplatin for squamous cell cancer of uterine cervix isvery useful in clinical practice.
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