Assessment of the Safety and Effect of SAR425899 Versus Placebo for the Treatment of Non-alcoholic Fatty Liver Disease

Inclusion criteria : * Non-diabetic or type 2 diabetes mellitus with confirmed non-alcoholic steatohepatitis. * Non-alcoholic fatty liver disease (NAFLD) activity score (NAS) \>=4 with each of its components \>=1. * Patients without Type 2 diabetes determined by HbA1c (glycated hemoglobin) \<6.5% and Fasting Plasma Glucose (FPG) \<7.0 mmol/L (\<126 mg/dL). * Stable glycemic control (HbA1c \<9.0%) and metabolic disorders managed with diet/exercise and/or stable dose metformin and/or sulphonylureas for at least 3 months prior to screening (type 2 diabetes patients). * Signed written informed consent form. Exclusion criteria: * Diagnosis of type 1 diabetes mellitus. * Previous insulin use or use of insulin within the last 6 months, except for episode(s) of short-term treatment (\<15 consecutive days) due to intercurrent illness. * Body Mass Index (BMI) \<25 kg/m2 or \>45.0 kg/m2. * Current participation in organized diet/weight reduction program or clinical trial of weight control (within the last 3 months prior to screening), or weight loss attempt, plans for major changes in physical activities or significant change in body weight in the 2 months prior to screening (significant change in body weight is defined as \>=5% self-reported change within 6 months prior to randomization if a pre-existing liver biopsy sample was collected prior to screening period. * Current treatment with glucose-lowering agent(s) other than metformin or sulphonylureas, weight loss drugs including orlistat, systemic steroids, methotrexate, amiodarone, or Vitamin E. * Alcoholism (past or present) and/or average alcohol consumption per week \>21 units (210 g) for males, \>14 units (140 g) for females within the last 5 years. * Poorly controlled hypertension (resting systolic blood pressure (SBP) \>160 mm Hg and/or resting diastolic blood pressure (DBP) \>95 mm Hg) at screening. * Some liver diseases, pancreatic disease, liver transplantation and types of cancer. * Pregnant or breast-feeding women. * Women of childbearing potential (WOCBP) not protected by highly-effective method(s) of birth control and/or who are unwilling or unable to be tested for pregnancy. * Male subjects, whose partners are able to become pregnant, who do not accept to use a condom during sexual intercourse from study inclusion up to 3 months after last dosing; or who are planning to donate sperm from study inclusion up to 3 months after last dosing. * Patients with coronary, carotid, or peripheral artery revascularization procedures planned during the screening or treatment phases of the protocol. * Patients with unstable heart conditions. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.