title: Evaluation of cisplatin combined with ondansetron in Ehrlich ascites carcinoma in vitro and in vivo.
abstract: OBJECTIVE
  Nausea and vomiting occur in the majority of patients receiving cisplatin (CDDP) chemotherapy. Ondansetron, a new 5-HT3 receptor antagonist, has been used effectively to control CDDP-induced nausea and vomiting. This study examined the potential of ondansetron to interfere with CDDP antitumor activity and toxicity in Ehrlich ascites carcinoma (EAC).
  
  
  METHODS
  The influence of ondansetron on CDDP cytotoxicity was evaluated using EAC cells in culture. In addition, the influence of ondansetron pretreatment on CDDP-induced antitumor activity and host tissue toxicity was studied in EAC-bearing mice.
  
  
  RESULTS
  Ondansetron (0.25 microM) enhanced CDDP (0-32 microM) cytotoxicity against EAC cells in vitro. In EAC-bearing mice ondansetron (0.2 mg/kg,ip) administered 1 h before CDDP (7 mg/kg, ip) did not modify the antitumor activity of CDDP. CDDP (7 mg/kg, ip) single treatment induced significant increases in blood urea nitrogen (2-fold) and serum creatinine (2.5-fold) and significant decreases in hematocrit (25%) and white blood cell count (39%) compared to saline treatment. Mice receiving ondansetron 1 h before CDDP showed no significant enhancement of CDDP-induced nephrotoxicity or myelosuppression compared to those pretreated with saline receiving the same dose of CDDP.
  
  
  CONCLUSIONS
  This study suggests that the use of ondansetron to control CDDP-induced nausea and vomiting does not affect CDDP antitumor efficacy.
authors.affiliation: Department of Pharmacology and Toxicology, College of Pharmacy, Al-Azhar University, Cairo, Egypt.
authors.forename: O A
authors.initials: OA
authors.lastname: Badary
authors.forename: S M
authors.initials: SM
authors.lastname: Sharaby
authors.forename: S A
authors.initials: SA
authors.lastname: Kenawy
authors.forename: E E
authors.initials: EE
authors.lastname: El-Denshary
authors.forename: F M
authors.initials: FM
authors.lastname: Hamada
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000932:Antiemetics / Q000627:therapeutic use*; D000970:Antineoplastic Agents / Q000009:adverse effects / Q000494:pharmacology*; D002286:Carcinoma, Ehrlich Tumor / Q000188:drug therapy*; D002945:Cisplatin / Q000009:adverse effects / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D005260:Female; D051379:Mice; D009325:Nausea / Q000139:chemically induced / Q000517:prevention & control*; D017294:Ondansetron / Q000627:therapeutic use*; D014407:Tumor Cells, Cultured; D014839:Vomiting / Q000139:chemically induced / Q000517:prevention & control*
chemical_list: D000932:Antiemetics; D000970:Antineoplastic Agents; D017294:Ondansetron; D002945:Cisplatin