Strategic Transformation of the Market of HCV Treatments
Strategic Transformation of the Market of HCV Treatments
This is a Phase II/III, multicenter, multi-country, trial to assess the efficacy, safety,
 tolerance and pharmacokinetics of sofosbuvir plus ravidasvir for the treatment of HCV
 infection.
This is a Phase II/III, multicenter, multi-country trial to assess the efficacy, safety,
 tolerance and pharmacokinetics of SOF-RDV for the treatment of HCV infection, across
 genotypes 1,2,3,6, among non-cirrhotic and cirrhotic with CTP class A, interferon/ribavirin
 naïve or experienced, HCV mono-infected and HCV/HIV co-infected subjects.

 It will also study the pharmacokinetics of RDV and, in HCV/HIV co-infected subjects, possible
 drug-drug interactions with antiretrovirals.

 The treatment duration will be 12 weeks for subjects with no cirrhosis (Metavir F0 to F3) and
 24 weeks for subjects with compensated cirrhosis (Metavir F4, CTP class A).

 The study is performed in 2 stages. Stage 1 has been completed. Efficacy and safety results
 from Stage 1 were reviewed and approved by the independent Data and Safety Monitoring Board
 (DSMB) which provided the recommendation to proceed with the study stage 2. On-going stage 2
 aims to supplement Stage 1 results and provide additional information on the performance of
 SOF-RDV in the main genotypes found in Malaysia and Thailand.
Inclusion Criteria:

 -  Evidence of chronic HCV infection, defined as: Positive anti-HCV antibody or
 detectable HCV RNA or HCV genotype at least 6 months before screening and HCV viral
 load ≥10^4 IU/mL at the time of screening / In subjects without documented HCV test
 results 6 months before screening, chronic hepatitis C infection can be assumed if
 risk exposures occurred > 6 months prior to screening and HCV viral load ≥10^4 IU/mL
 at the time of screening.

 -  Willing and able to provide written informed consent.

 -  Men and women age ≥ 18 years and < 70 years.

 -  Body Mass Index (BMI) of 18 to 35 kg/m2.

 -  Intention to comply with the dosing instructions for study drug administration and
 able to complete the study schedule of assessments.

 -  Women with a negative pregnancy test at screening and baseline.

 -  Women of child bearing potential who accept a highly effective contraceptive method
 from at least 2 weeks prior to study day 1 until 1-month post-treatment. A woman is of
 non-child bearing potential if she (a) reached natural menopause determined
 retrospectively after 12 months of amenorrhea without any other obvious medical cause
 or (b) had procedures like bilateral tubal ligation or hysterectomy or bilateral
 oophorectomy.

 -  Subjects who are compliant in an opioid substitution maintenance program (e.g. with
 methadone or buprenorphine) may be included as long as there is no concern about study
 medications adherence and interaction or compliance to study schedules.

 -  Inclusion criteria related to HIV/HCV co-infected patients:

 -  HIV/HCV co-infected patients receiving cART fulfilling the below criteria are
 eligible for the study: Antiretroviral therapy (ART) should have been initiated
 at least 6 months prior to screening / Patient has to have been on the same
 protocol-approved ARV regimen for ≥ 8 weeks prior to screening and is expected to
 continue the current ARV regimen through the end of study / HIV ARVs: agents
 allowed in this study should be administered per the prescribing information in
 the package insert / Screening HIV RNA < 50 copies/mL / Screening CD4 cell count
 ≥ 100 cells/uL

 -  HIV/HCV co-infected patients not receiving cART: Screening CD4 cell count must be
 ≥ 500 cells/uL

 Exclusion Criteria:

 -  Decompensated cirrhosis defined as: Evidence of advanced stage liver cirrhosis and
 Child-Turcotte-Pugh (CTP) Class B or C or CTP score >6) or current/past history of
 decompensation including ascites, variceal bleeding, spontaneous bacterial
 peritonitis, or hepatic encephalopathy.

 -  Hepatocellular carcinoma: for all patients with cirrhosis, hepatocellular carcinoma
 (HCC), should be excluded by liver imaging within 6 months prior to screening, and
 this must continue periodically as in routine HCC surveillance.

 -  Laboratory exclusion criteria:

 -  cirrhotic subjects with albumin < 2.8 g/dL

 -  direct bilirubin > 3xULN

 -  AST, ALT > 10xULN

 -  Low neutrophil count (≤599 cells/mm3), hemoglobin (<9.0 g/dL for male, <8.5 g/dL
 for female), platelets (<50000 cells/mm3 ) classified as ≥ Grade 3

 -  Patients with serum creatinine > 1.5 ULN or end stage renal disease

 -  Hepatitis B co-infection (HBsAg positive)

 -  Pregnancy, as documented by positive pregnancy tests at screening or baseline

 -  Breastfeeding

 -  Subjects currently receiving or unable to stop the use for at least 1 week prior to
 receiving the first dose of study drug any medications or herbal supplements known to
 be potent inhibitors or moderate inducers of cytochrome P450 (CYP) 3A4 or potent
 inducers of P-glycoprotein. This includes subjects who are on amiodarone or other
 contraindicated/excluded drugs.

 -  Participation in other clinical trials within 3 months.

 -  Any clinically significant findings or unstable condition during the screening,
 medical history or physical examination that, in the investigator's opinion, would
 compromise participation in this study as per standard guidelines and local practice.
 This could include patients with poorly controlled hypertension, asthma, diabetes, or
 other life-threatening conditions.

 -  Current or history of use within the preceding 6 months of immunosuppressive or
 immune-modulating agents. Corticosteroid used to treat any medical condition are
 allowed if systemic for not more than 2 weeks or if topical.

 -  History of solid organ or bone marrow transplantation.

 -  Any prior NS5A inhibitors therapy.

 -  Patients with significant cardiovascular conditions including:

 -  myocardial infarction within the previous 6 months or

 -  heart failure NYHA class III or IV

 -  history of Torsade de pointes

 -  Third degree heart block

 -  QTcF (Fridericia) value ≥ 450 milliseconds at Baseline

 -  Severe sinus bradycardia with a rate of under 50 beats per minute

 -  A sinus bradycardia with third degree atrioventricular block or with Mobitz II AV
 block

 -  Use of medications associated with QT prolongation concurrently or within the 30 days
 prior to Screening Visit, including: macrolides, antiarrhythmic agents, azoles,
 fluoroquinolones, and tricyclic anti-depressants. Commonly used and essential
 medications for this study population like methadone and/or efavirenz is allowed as
 long as the QTcF value at baseline is < 450 milliseconds.

 -  Self-reporting active injection drug use at screening (only for stage 2).

 -  Exclusion criteria related to HIV/HCV co-infected patients: HIV/HCV co-infected
 patients not yet on stable antiretroviral therapy or for whom ART treatment initiation
 maybe scheduled during the study period.