The Sponsor, Genfit, has developed a new formulation of GFT505 (60 mg). The objective is to compare the relative bioavailability between the new GFT505 formulation (capsule dosed at 60 mg GFT505) and the old GFT505 formulation (capsule dosed at 20 mg GFT505) in healthy male subjects and to assess the impact of gender on this relative bioavailability after administration in male and female subjects.

Using the new formulation, a single and a multiple ascending dose study will be performed in overweight or obese male subjects otherwise healthy whose demographic and physiological characteristics are thought to be closer to those of the target population (Type 2 diabetes). Thereafter, a group of male and female patients with Type 2 diabetes will receive multiple dose administration of GFT505.

The study will be divided in 4 successive parts :

• Study Part I will be a comparative bioavailability between a new GFT505 formulation (capsule dosed at 60 mg GFT505 by capsule) and the old GFT505 formulation (capsule dosed at 20 mg GFT505 by capsule) coupled with an evaluation of the gender effect assessed with the new formulation. In this purpose a group of 12 male subjects will receive successively both formulations on a unique occasion in a randomized manner while a group of 12 female subjects will receive the new formulation on one occasion only. This part of the study will be done in healthy volunteers.
• Study Part II will be a single ascending dose to be run at a maximum of 3 dose levels. Subjects included in this part of the study will receive only one dose level to limit the exposure to GFT505. Three cohorts of 8 subjects are planned to be included. This part will be run in overweight or obese subjects.
• Study Part III will start after completion of the first Cohort of Study Part II. Study Part III will be a multiple ascending dose to be run at a maximum of 3 dose levels. Subjects included in this part of the study will receive only one dose level to limit the exposure to GFT505. Three cohorts of 12 subjects are planned to be included. This part will be run in overweight or obese subjects.
• Study Part IV will follow the same design and same treatment schedule than Study Part III but will be performed in the target population, patients with Type 2 diabetes and only one dose will be tested in study part IV.

Inclusion Criteria:

Part I :

• Male or female healthy volunteers 18 to 45 years of age (inclusive).
• Subjects with a body mass index (BMI) ≥ 18 and ≤ 28 kg/m2 at screening.
• For female subjects of childbearing potential, use of double contraception method.
• Normal arterial blood pressure (BP) and pulse rate or, if abnormal, considered not clinically significant by the principal Investigator.

Part II and III :

• Male healthy volunteers 18 to 55 years of age (inclusive).
• Subjects with a BMI >28 and <35 kg/m2 at screening.
• Normal arterial BP and pulse rate or, if abnormal, considered not clinically significant by the principal Investigator.

Part IV :

• Male or female Type 2 diabetic patients 18 to 60 years of age.
• Females participating in the study must be either of non-child bearing potential or using an efficient double contraception.
• Currently treated with any antidiabetic treatment (a maximum of two anti-diabetic drugs including metformin in all cases) with the exception of insulin or GLP analogs and agonists therapy.
• Stable diabetes with glycosylated hemoglobin (HbA1c) < or =10% or less.
• Normal renal function as defined by a creatine clearance >90 mL/min calculated with the Cockcroft-Gault formula.
• Subjects with a BMI from 18 to 32 kg/m2 at screening.

Exclusion Criteria:

Part I :

• Who previously received GFT505.
• With any clinically significant abnormality following review of prestudy laboratory tests (Aspartate and Alanine aminotransferase must be within normal ranges), vital signs, full physical examination and Electrocardiogram.
• Who have a positive laboratory test for Hepatitis B surface antigen (HbsAg), or anti-HIV 1/2 (Human immunodeficiency virus) or anti-HCV (Hepatitis C virus) antibodies.
• Who are known or suspected alcohol or drug abusers (more than 14 units of alcohol per week, one unit = 8 g or about 10 mL of pure alcohol).
• Who drink more than 8 cups daily of beverage containing caffeine.
• Who have a positive laboratory test for urine drug screening (opiates, cocaine, amphetamine, cannabis, benzodiazepines).
• Who have undergone surgery or have donated blood within 12 weeks prior to the start of the study.
• Who have taken any prescribed or over the counter drug (including antacid drug), with the exception of paracetamol (up to 3 g per day) within 2 weeks prior to the first dose administration.

Part II and III : specific additional exclusion criteria

- Who have taken fibrates within 6 weeks prior to the first dose administration.

Part IV : specific additional exclusion criteria

• With unstable proliferative retinopathy, macular oedema (fundus examination performed in the previous year will be considered relevant on Investigator's judgement).
• Who have taken fibrates within 6 weeks prior to the first dose administration.