Primary Objective:

- To investigate the effects of two single subcutaneous lixisenatide doses (5 and 10 µg) as compared to placebo in reducing postprandial glucose (PPG) in type 2 diabetic paediatric population (10-17 years old) and adults as controls

Secondary Objectives:

- To evaluate in both paediatric and adult populations:

• the blood levels of lixisenatide (pharmacokinetic) parameters in plasma after single subcutaneous ascending doses
• the maximum post-prandial glucose excursion, and on the changes in insulin, C-peptide and glucagon plasma concentrations following a standardized breakfast
• safety and tolerability.

The duration of the study for each patient is planned between 4 and 7 weeks including a screening period (25 to 30 days), 3 treatment periods 1-7 days apart, each period lasting only one day (Day 1) and an end-of-study visit between 1 to 7 days after the last dose administration.

Inclusion criteria :

• Male or female patients with type 2 diabetes mellitus, as defined by WHO (fasting plasma glucose ≥ 7 mmol/L (126mg/dL) or 2 hours postprandial plasma glucose ≥ 11.1 mmol/L (200 mg/dL)), diagnosed for at least 1 year (adults) and at least 3 months for paediatric population at the time of screening visit, with or without metformin (stable dose ± 10 % for at least 4 weeks prior to randomization)
• HbA1c ≥ 7% and ≤ 10% at screening
• Age eligibility for paediatric population: ≥ 10 years and <18 years with at least 3 patients below 15 years and no more than 3 patients aged between 16 and 18 years; Age eligibility for adults: ≥ 18 and ≤ 65 years
• For paediatric population:body weight >50kg, BMI >85th percentile for age and gender and BMI ≤ 50 kg/m²
• For adults: BMI > 25 kg/m2 and ≤ 37 kg/m2

Exclusion criteria:

• If female, pregnancy (defined as positive serum pregnancy test), breast-feeding
• Diabetes other than type 2 diabetes
• Positive test for insulinoma associated protein (IA2) and glutamic acid decarboxylase (GAD) autoantibodies
• Use of other oral or injectable antidiabetic or hypoglycemic agents other than metformin (e.g., alpha glucosidase inhibitor, exenatide, DPP-IV inhibitors, insulin etc.) within 3 months prior to the time of screening
• Allergic reaction to any GLP-1 agonist in the past (e.g. exenatide, liraglutide) or to metacresol
• History of unexplained pancreatitis, chronic pancreatitis, pancreatectomy, stomach/gastric surgery, inflammatory bowel disease
• Personal or family history of medullary thyroid cancer (MTC) or genetic conditions that predispose to MTC (e.g., multiple endocrine neoplasia syndromes)

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.