Beijing Inno Medicine Co., Ltd.

This study consists of two parts. The SAD and MAD of part I are a randomized, double-blind, placebo-controlled, single and multiple ascending dose study in healthy adult subjects. The MAD expansion cohort of part I is single arm and multipal ascending dose in heallthy subjects. Part II (phase Ib/IIa) is a multicenter, randomized, controlled, open label, multiple ascending dose study in patients with coronary atherosclerosis.

Ia期主要目的：在中国健康受试者中，评估YN001单次和多次静脉给药剂量递增的安全性和耐受性及药代动力学特征。 次要目的：在中国健康受试者中，评估YN001单次静脉给药剂量递增对QT/QTc间期的影响及多次静脉给药剂量递增的免疫原性。 Ib期主要目的：在冠状动脉粥样硬化患者中，评估YN001多次静脉给药剂量递增的安全性和耐受性； 次要目的：在冠状动脉粥样硬化患者中，评估YN001多次静脉给药剂量递增的药代动力学特征、初步疗效、免疫原性和细胞因子变化。

This will be a single center, randomized, double-blind, placebo-controlled, single ascending dose and multiple ascending dose study in healthy adult subjects.