A randomized cross-over trial to determine the effect of Cremophor EL on the pharmacodynamics and pharmacokinetics of carboplatin chemotherapy.
OBJECTIVE
Paclitaxel, when combined with carboplatin, exhibits a platelet-sparing effect. Paclitaxel is formulated in Cremophor EL (CrEL), which has been shown in preclinical models to reduce haematological toxicity from radiotherapy and chemotherapy. We sought to determine the effect of a 3-h infusion of 20 ml/m2 (equivalent to 175 mg/m2 paclitaxel) CrEL on myelosuppression following carboplatin chemotherapy, and the effect of CrEL on carboplatin pharmacokinetics.


METHODS
A total of 16 patients with locally advanced or metastatic cancer were randomized to receive either CrEL or saline over 3 h prior to carboplatin (area under the curve, AUC, 5-7). Each patient was subsequently crossed over to the other treatment. Blood samples were collected at selected time-points for estimation of platinum AUC and 24-h platinum levels. Full blood counts were obtained three times per week.


RESULTS
Of the 16 patients randomized, 15 were evaluable. Myelosuppression was measured by percentage fall at nadir and nadir levels. No significant differences were obtained when comparing CrEL and saline with respect to the above end-points after adjusting for multiple testing. There was no evidence to indicate that CrEL altered the pharmacokinetics of carboplatin.


CONCLUSIONS
CrEL at this dose and schedule does not appear to be a major contributory factor to the platelet-sparing effect of paclitaxel when combined with carboplatin, nor does it alter the pharmacokinetics of carboplatin.
Loi
Sherene
S
Division of Haematology and Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, Australia.
Rischin
Danny
D
Michael
Michael
M
Yuen
Kally
K
Stokes
Kerrie H
KH
Ellis
Andrew G
AG
Millward
Michael J
MJ
Webster
Lorraine K
LK
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000970:Antineoplastic Agents / Q000097:blood / Q000493:pharmacokinetics / Q000627:therapeutic use; D019540:Area Under Curve; D016190:Carboplatin / Q000097:blood / Q000493:pharmacokinetics* / Q000627:therapeutic use*; D018592:Cross-Over Studies; D005260:Female; D005990:Glycerol / Q000031:analogs & derivatives* / Q000494:pharmacology*; D006801:Humans; D008297:Male; D008657:Metabolic Clearance Rate; D008875:Middle Aged; D009369:Neoplasms / Q000097:blood / Q000188:drug therapy*; D013501:Surface-Active Agents / Q000494:pharmacology
D000970:Antineoplastic Agents; D013501:Surface-Active Agents; C000515:cremophor EL; D016190:Carboplatin; D005990:Glycerol