The secondary objectives are to assess the overall safety of lixisenatide once daily treatment in monotherapy at Week 52 and Week 76; to assess the effects of lixisenatide on glycosylated hemoglobin (HbA1c) reduction at Week 52 and Week 76, body weight, and fasting plasma glucose (FPG); to assess pharmacokinetics (PK) and anti-lixisenatide antibody development.