On September 15, 2016 ArQule, Inc. (Nasdaq: ARQL) reported the publication of a paper detailing the preclinical profile of ARQ 087, an orally available fibroblast growth factor receptor (FGFR) inhibitor (Press release, ArQule, SEP 15, 2016, View Source [SID:SID1234515151]). The findings, published on-line by PLOS ONE, View Source, demonstrate that ARQ 087 has anti-proliferative activity in cell lines driven by FGFR dysregulation, including amplifications, fusions, and mutations.
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ARQ 087 is being dosed in intrahepatic cholangiocarcinoma (iCCA) patients with FGFR2 genetic alterations as part of the phase 2 portion of a biomarker driven phase 1/2 trial. The company has been granted orphan drug designation by the U.S. Food and Drug Administration and European Medicines Agency for ARQ 087 in this indication.
About Intrahepatic Cholangiocarcinoma
Cholangiocarcinoma (CCA) is the most common biliary malignancy and the second most common hepatic malignancy after hepatocellular carcinoma (HCC)1. Depending on the anatomic location, CCA is classified as intrahepatic (iCCA), perihilar (pCCA), and extrahepatic (eCCA). iCCA originates from the intrahepatic biliary ductal system and forms an intrahepatic mass. The average age adjusted incidence rate for iCCA is approximately one in 100,000 per year in the United States and Europe2,3.
About FGFR and ARQ 087
ARQ 087 is a multi-kinase inhibitor designed to preferentially inhibit the fibroblast growth factor receptor ("FGFR") family with demonstrated activity in FGFR2 genetic alterations. The FGFR pathway is disrupted in several ways in human cancer, thus providing numerous therapeutic targets for an inhibitor of this pathway. ARQ 087 has demonstrated in vivo inhibition of tumor growth and downstream signaling in tumors whose growth is driven by FGFR targets.
Signals of single agent activity with this drug were observed in phase 1a testing. Phase 1b expansion cohorts with ARQ 087 include patients with cholangiocarcinoma and adrenocortical tumors, as well as those with FGFR translocations, amplifications and mutations. Clinical development of ARQ 087 has advanced into phase 2 for intrahepatic cholangiocarcinoma (iCCA) following the observation of two confirmed responses in this patient population in the phase 1 portion of the program.