The TARGET Phase 2b trial was conducted in 199 patients, randomized to one of three arms: vintafolide alone, vintafolide/docetaxel combination, or docetaxel alone. Secondary endpoints, including overall response rate and OS, also showed trends in favor of the combination arm. Median OS has been reached for the vintafolide and docetaxel single-agent arms but has not yet been reached in the combination arm. In addition, the investigational combination regimen showed better activity in patients with adenocarcinoma, a subset analysis pre-specified in the trial design.
The safety profile of the combination arm was consistent with those observed with docetaxel alone and vintafolide alone, though a higher rate of hematologic and peripheral neuropathy adverse events were observed in the combination arm. There were no drug-related deaths in the combination arm. Single-agent vintafolide at the schedule evaluated in this study demonstrated less activity than single-agent docetaxel.
"We are pleased with the results of this study, as the vintafolide/docetaxel combination showed meaningful activity in patients with recurrent NSCLC, meeting the primary endpoint of the trial," said
"We are encouraged by the results from the TARGET trial which show activity with vintafolide in these difficult-to-treat patients, and look forward to reviewing still maturing data from TARGET later this year," said Dr.
Date: March 21, 2014
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About the TARGET trial
TARGET is an international, multicenter, open-label Phase 2b study designed to evaluate vintafolide in patients with stage IIIb or IV NSCLC with all lesions positive for the folate receptor (FR 100%) as determined by the investigational companion imaging agent etarfolatide (EC20) and who have failed one prior chemotherapy (ClinicalTrials.gov Identifier: NCT01577654). Secondary endpoints include the comparison of overall response rate, disease control rate, duration of response, duration of disease control, overall survival of the participants between treatment arms, and the incidence of adverse and serious adverse events. TARGET included three investigational arms, vintafolide monotherapy and vintafolide in combination with docetaxel, each of which was compared to a standard-of-care control arm, docetaxel monotherapy.
About Vintafolide, Etarfolatide and IV Folic Acid
Vintafolide is an investigational conjugate of folic acid (vitamin B9) linked to an anti-cancer agent, the potent vinca alkaloid desacetylvinblastine hydrazide (DAVLBH). Since cancer cells generally consume higher levels of folate than normal cells to fuel their growth, some cancer cell types - including ovarian and NSCLC - have high concentrations of the folate receptor on their surface. Vintafolide is designed to selectively target the folate receptor to deliver the anti-cancer agent to the cancerous tissue. Tumors that have high concentrations of the folate receptor are identified by etarfolatide, a non-invasive imaging diagnostic agent. Intravenous folic acid is used with 99mTc-etarfolatideetarfolatide for the enhancement of image quality.
Vintafolide, etarfolatide and IV folic acid have been granted orphan drug status by the EMA.
Endocyte Forward-Looking Statement
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