Shanghai: Thursday, June 22, 2017: Hutchison MediPharma (“HMP”) has just initiated a Phase I/II clinical trial of HMPL‑453 in China. HMPL‑453 is a novel, highly selective and potent small molecule inhibitor targeting fibroblast growth factor receptor (“FGFR”). The first drug dose was administered on June 19, 2017. This study complements the first-in-human Phase I clinical trial in Australia that was initiated earlier this year.
This Phase I/II study is a multi‑center, single‑arm, open‑label, two‑stage study to evaluate safety, tolerability, pharmacokinetics (“PK”) and preliminary efficacy of HMPL‑453 monotherapy in patients with solid tumors harboring FGFR genetic alterations. The dose-escalation stage will enroll patients with locally advanced or metastatic solid tumors, for whom standard therapy either does not exist or has proven to be ineffective or intolerable, regardless genetic status, to determine the maximum tolerated dose (MTD) and recommended Phase II dose (“RP2D”).
The dose-escalation will be followed by a dose-expansion stage, which will further evaluate safety, tolerability and PK as well as preliminary anti-tumor efficacy at the RP2D. This stage will enroll primarily cancer patients harboring FGFR dysregulated tumors, including those with advanced bladder cancer, advanced cholangiocarcinoma and other solid tumors. For this second stage, the primary endpoint is objective response rate (ORR), with secondary endpoints including duration of response (DoR), disease control rate (DCR), progression free survival (PFS), overall survival (OS) and safety. Additional details about this study can be found at clinicaltrials.gov, using identifier NCT03160833.
About bladder cancer and cholangiocarcinoma
Bladder cancer makes up approximately 90% of urothelial carcinomas. Bladder cancer is the sixth most common cancer in the U.S., and the ninth most common cancer in China, with about 80,000 new cases annually in both countries.[], [] In the U.S. the five-year survival rate for those whose disease has metastasized is approximately 5%. Despite advances in the treatment of locally advanced or metastatic urothelial carcinoma, the prognosis for patients remains poor and more treatment options are needed.
A highly unmet medical need around the world, cholangiocarcinoma (bile duct cancer, “CCA”) accounts for approximately 3% of all gastrointestinal cancers and is the most common malignancy of the biliary tract (the combined system of the liver, gall bladder and bile ducts).[] CCA is classified as intrahepatic or extrahepatic based on anatomical location, with studies suggesting that the incidence of intrahepatic CCA in particular is increasing.[] Currently CCA has a bleak prognosis, with a 5-year survival rate of less than 5%.[]
FGFRs are a sub‑family of receptor tyrosine kinases. Activation of FGFR signaling pathways is central to several biological processes. In normal physiology, FGF/FGFR signaling is involved in embryonic development (organogenesis and morphogenesis), tissue repair, angiogenesis, neuroendocrine and metabolism homeostasis. Given its complexity and critical role in a number of important physiological processes, aberrant FGFR signaling has been found to be a driving force in tumor growth, promotion of angiogenesis, as well as conferring resistance to anti‑tumor therapies. To date, there are no approved therapies specifically targeting the FGFR signaling pathway.
HMPL‑453 is a novel, highly selective and potent small molecule inhibitor targeting fibroblast growth factor receptors 1, 2 and 3. In pre‑clinical studies, HMPL‑453 demonstrated superior potency and better kinase selectivity as compared to other drugs in the same class, as well as a favorable safety profile. HMP is also conducting a Phase I study of HMPL‑453 in Australia, for which additional details can be found at clinicaltrials.gov, using identifier NCT02966171.
 National Cancer Institute. The Surveillance, Epidemiology, and End Results (SEER): Cancer Stat Facts: Bladder Cancer. Available at: https://seer.cancer.gov/statfacts/html/urinb.html. Accessed May 23, 2017.
 R. Zheng et al, National estimates of cancer prevalence in China 2011, Cancer Letters 2016 370(1) 33-38.
 A. Bergquist et al, Epidemiology of cholangiocarcinoma, Best Pract Res Clin Gastroenterol 2015 29(2) 221–32.
 T. Patel, Cholangiocarcinoma, Nat Clin Pract Gastroenterol Hepatol 2006 3(1) 33-42.
 J. Byrling et al, Cholangiocarcinoma-current classification and challenges towards personalised medicine, Scand J Gastroenterol 2016 51(6) 641-3.