On August 24, 2015 Five Prime Therapeutics, Inc. (Nasdaq:FPRX), a clinical-stage biotechnology company focused on discovering and developing novel protein therapeutics for cancer and inflammatory diseases, reported that initial data from GlaxoSmithKline (GSK)’s ongoing Phase 1b trial of FP-1039/GSK3052230, an FGF ligand trap, in patients with squamous non small cell lung cancer (sqNSCLC) and mesothelioma will be featured in an oral presentation by study investigators during the upcoming World Conference on Lung Cancer 2015 in Denver (September 6-9, 2015) (Press release, Five Prime Therapeutics, AUG 24, 2015, View Source [SID:1234507326]).

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Abstract #2879 entitled, "FP1039/GSK3052230 with Chemotherapy in Patients with Fibroblast Growth Factor (FGF) pathway deregulated squamous NSCLC or MPM," published today at View Source and includes data through the time of submission in April 2015. The oral presentation is scheduled on Wednesday, September 9, 2015 in the "Mini 38: Biology and Prognosis" session [6:30-8:00 pm] and is expected to include study data up to August 2015, which will be detailed in a press release at that time.

The Phase 1B trial being conducted by GSK is evaluating the safety and efficacy of FP-1039/GSK3052230 weekly infusion in combination with paclitaxel + carboplatin in previously untreated FGFR1 gene amplified metastatic squamous NSCLC (Arm A), in combination with docetaxel in FGFR1 gene amplified metastatic squamous NSCLC that has progressed after at least 1 line of chemotherapy (Arm B), or in combination with pemetrexed + cisplatin in patients with untreated and unresectable malignant pleural mesothelioma (Arm C). GSK continues to enroll patients in the study. Arm A and Arm C have advanced into the expansion phase and dose escalation is ongoing for Arm B.

Five Prime licensed development and commercialization rights for FP-1039/GSK3052230 in the U.S., Europe and Canada to GSK, which funds clinical development. Five Prime retains rights outside of these regions as well as an option to co-promote FP-1039/GSK3052230 in the U.S.

About FP-1039/GSK3052230

FP-1039/GSK3052230 is a protein drug designed to intervene in FGF signaling. As a ligand trap, FP-1039/GSK3052230 binds to FGF ligands circulating in the extracellular space, preventing these signaling proteins from reaching FGFR1 on the surface of tumor cells where they would otherwise stimulate cancer cell division and/or angiogenesis. However, FP-1039/GSK3052230 does not bind to certain "hormonal" FGFs, including FGF23, which regulates phosphate levels in the blood. As a result, treatment with FP-1039/GSK3052230 treatment has not been shown to cause hyperphosphatemia, a side effect seen with small molecule inhibitors of FGF receptors, which block the activity of both cancer-associated FGFs and FGF23.

Five Prime licensed development and commercialization rights for FP-1039/GSK3052230 in the U.S., Europe, and Canada to GSK, which funds clinical development. The Phase 1B clinical trial is investigating treatment with FP-1039/GSK3052230 combined with standard doses of chemotherapy in patients with newly-diagnosed or recurrent FGFR1 amplified metastatic squamous non-small cell lung cancer as well as patients with malignant pleural mesothelioma, a tumor in which the FGF2 ligand is overexpressed.