(Fast-Track proposals will not be accepted. Phase II information is provided only for informational purposes to assist Phase I offerors with their long-term strategic planning.)
Number of anticipated awards: 1
Budget (total costs):
Phase I: $300,000 for 9 months;
Phase II: $2,000,000 for 2 years
It is strongly suggested that proposals adhere to the above budget amounts and project periods. Proposals with budgets exceeding the above amounts and project periods may not be funded.
The deadline for receipt of all contract proposals submitted in response to this solicitation has expired. It was: November 13, 2012 by 5 p.m. EST.
Over the past two years, medical oncologists have added three new therapies to the therapeutic arsenal against Castration-Resistant Prostate Cancer (CRPC): abiraterone, Sipleucel-T, and cabazitaxel. Before approval of these agents, docetaxel was the only life-extending therapeutic option for men with CRPC, and docetaxel remains the standard of care for men who can tolerate chemotherapy. Moreover, there are several promising agents that are likely to be FDA-approved for CRPC in coming years (i.e., MDV-3100, EPI-001, and TOK-001). Therefore, the commercial availability of a method to determine which CRPC patients will have a superior response to docetaxel therapy (and which CRPC patients will not respond), will allow medical oncologists to consider other approved options in certain patients, thereby "personalizing" CRPC therapy.
The National Cancer Institute (NCI) has developed a genotype test that can indicate the duration of survival following docetaxel therapy in men with CRPC. The test detects a genetic variant in cytochrome P450 1B1 (CYP1B1*3; 4326C>G) that encodes a leucine-to-valine amino acid substitution, L432V, in the translated protein. This genetic polymorphism causes P450 1B1 *3 to synthesize higher than normal concentrations of a reactive estrogen species (e.g., estradiol-3,4-quinone [E2-3,4Q]) that reduces docetaxel activity via two distinct mechanisms. Firstly, E2-3,4Q binds directly to docetaxel at biological pH, thereby reducing docetaxel potency. Secondly, E2-3,4Q antagonizes the mechanism of action of docetaxel (i.e., microtubule stabilization), by destabilizing the interaction between tubulin thiol groups that are required to form microtubules. Therefore, a simple genotypic test can determine whether or not a patient will respond to docetaxel, or whether treatment with other newly-approved anticancer agents is warranted. The genetic marker CYP1B1*3 could be used as a prognostic tool to predict survival rate and propensity to respond to docetaxel treatment.
The focus of this topic is to advance development of this genetic test which would provide rapid and useful a priori predictions of the clinical outcome of docetaxel patients and guide the therapeutic strategy for each patient. The short-term goals of this project are to: (i) develop a rapid and reproducible assay for the CYP1B1*3 variant; (ii) provide additional preclinical evidence necessary for carrying the CYP1B1*3 genotype test into the clinical setting; and (iii) determine if cabazitaxel activity is related to the CYP1B1*3 allele and reactive estrogen species. The long-term goal of this project is obtain FDA approval for the test, to establish broader utility for the CYP1B1*3 test in treatment of other cancer types, implement the test in conjunction with alternate therapeutics that act via modulation of this estrogen responsive pathway, and to further translate the utility of the genotype test to wider clinical use. This technology, once demonstrated in the field of prostate cancer, could be applied to breast and lung cancer genetic markers that have clinical application in defining the chemotherapeutic treatment schedules for individual patients.
Phase I deliverables include technique development, further demonstration of the mechanism of CYP1B1*3 interference, validation that genotype is related to survival using retrospective CRPC patient samples, and identification of the percentage of samples with the variant. A future Phase II SBIR award would include a genotype-directed prospective clinical trial with docetaxel and/or cabazitaxel to demonstrate improved taxane outcomes in genotyped patients.
This is an NIH TT (Technology Transfer) contract topic from the NCI. This is a program whereby inventions from the NCI Intramural Research Program (Center for Cancer Research, CCR) are licensed to qualified small businesses with the intent that those businesses develop these inventions into commercial products that benefit the public. The contractor funded under this contract topic shall work closely with the NCI CCR inventor of this technology. The inventor will provide assistance in a collaborative manner with reagents and discussions during the entire award period.
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