Regorafenib Versus Placebo to Treat Cholangiocarcinoma

The study is a multicenter randomized (1:1) placebo-controlled, double-blinded phase II trial aiming to demonstrate an improvement of median PFS when treating locally advanced unresectable or metastatic patients suffering from an intra-hepatic or hilum (mass-forming) cholangiocarcinoma with Regorafenib as compared to placebo, and after progression after GEM-CDDP (or GEM-OX), or gemcitabine alone followed or preceded by platinum (CDDP or oxaliplatin)-based chemotherapy.

The principal objective is to investigate Regorafenib efficacy by prospectively evaluating the PFS after the administration of Regorafenib combined with BSC as compared to placebo with BSC. Hypothesis is a 50% improvement in median PFS (from 6 weeks to 12 weeks in Regorafenib group).

The principal objective is to investigate Regorafenib efficacy by prospectively evaluating the PFS after the administration of Regorafenib combined with BSC as compared to placebo with BSC. Hypothesis is a 50% improvement in median PFS (from 6 weeks to 12 weeks in Regorafenib group).

Eligibility Criteria:
Inclusion Criteria:

* histologically proven intra-hepatic or hilum cholangiocarcinoma (mass forming, not "liniting" tumor), locally advanced unresectable or metastatic
* progression documented after GEM-CDDP (or GEM-OX), or gemcitabine alone followed or preceded by platinum-based (CDDP or oxaliplatin) chemotherapy
* age \> 18 years
* ECOG PS 0/1 at study entry
* measurable disease according to RECIST version 1.1
* Adequate bone marrow, liver and renal function as assessed by the following laboratory requirementsconducted within 7 days of starting to study treatment:

oSerum creatinine \<1.5x upper reference range

oTotal bilirubin \<1.5x ULN

oAlanine transaminase (ALT) and aspartate aminotransferase (AST) \< 2.5x ULN (\<5x ULN forpatients with liver involvement of their cancer).

oAmylase and lipase \<1.5x ULN.

* life expectancy of at least 12 weeks
* effective contraception for both male and female patients if the risk of conception exists
* negative proteinuria on dipstick or 24 hours proteinuria\<1000mg
* signed written informed consent

Exclusion Criteria:

* unability to take oral medication
* any malabsorption condition
* patients taking strong cytochrome P (CYP) CYP3A4 inhibitors (eg. Clarithromycin, indinavir,itraconazole, ketoconazole, nefazodone, nelfinavir, posaconazole, ritonavir, saquinavir, telithromycin,voriconazole) or strong CYP3A4 inducers (eg. Carbamazepine, phenobarbital, phenytoin, rifampin, St-John's Wort) (see section 8)
* persistent proteinuria \>3.5g/24 hours measured by urine protein-creatinine ratio from a random urinesample (persistent proteinuria \>3 non-healing woud, ulcer, or bone fracture
* any hemorrhage or bleeding event ≥ CTCAE Grade 3 within 4 weeks prior to the start of studymedication
* interstitial lund disease with ongoing signs and symptoms at the time of informed consent
* uncontrolled concurrent CNS, cardiac, infectious diseases, hypertension
* history of myocardial infarction, deep venous or arterial thrombosis, cerebrovascular accident (CVA) during the last 6 months
* previous exposure to anti-VEGF targeting therapy (including Regorafenib) and to signal transduction inhibitors
* known hypersensitivity to any of the components of study treatments
* previous malignancy in the last past 5 years except basal cell cancer of the skin or preinvasive cancer of the cervix
* pregnant or lactating women, or patients of both genders with procreative potential not using adequate contraceptive methods
* medical or psychological conditions that would not permit the patient to complete the study or sign inform consent
* unstable angina, congestive heart failure ≥NYHA class II
* uncontrolled hypertension despite optimal management (systolic blood pressure \>150 mmHg or diastolic pressure \> 90mmHg)
* pheochromocytoma
* HIV infection
* active chronic hepatitis B or C with a need for antiviral treatment
* liver failure, cirrhosis Chil Pugh B or C
* brain metastasis
* major surgery, open biopsy or significant traumatic injury within 4 weeks prior to the first dose of treatment
* intra-hepatic locoregional therapy (DC Beads, SIRT)
* history of organ allograft
* ongoing infection
* renal failure requiring dialysis
* patients receiving or having received any investigational treatment within 4 weeks prior to study entry, or participating to another clinical study