Ovarian Neoplasms Clinical Trial
Official title:
Pharmacogenomics of Paclitaxel in Ovarian Cancer: Predictors of Toxicity and Response
This study will try to determine whether or not certain genes are responsible for the huge variation in toxicity and effect observed between patients treated with paclitaxel (chemotherapeutic drug). Specifically we will study this retrospectively in patients who participated in clinical trials that are now closed. All patients had ovarian cancer and received paclitaxel/carboplatin chemotherapy after primary surgery.
Paclitaxel is an antineoplastic drug used in the treatment of ovarian cancer. The effect and
toxicity is unpredictable in the individual patient. Paclitaxel is removed (eliminated) from
the organism by oxidation. CYP2C8 is the enzyme mainly responsible. P-glycoprotein (Pgp) is
an efflux transport protein natural to the human organism. Pgp is responsible for excretion
of drugs via the bile and the kidneys and is thought to play a role in chemotherapy
resistance. Paclitaxel is substrate for Pgp. Single nucleotide polymorphisms are possible
causes for variation in both CYP2C8 and Pgp expression/function. We will study a possible
role of these genetic variations as predictors of paclitaxel toxicity and effect and the
possible implications for individual dosing in the future.
We will use tissue from patients who participated in one of two clinical trials that are
both closed for inclusion. Genotypic data from this tissue will be correlated with toxicity
and survival data drawn from a research database. We expect to be able to find >300
available cases to study.
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Observational Model: Cohort, Time Perspective: Retrospective
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