The invention relates to RNAi agents, e.g., double stranded RNAi agents, targeting the Serpina1 gene, and methods of using such RNAi agents to inhibit expression of Serpina1 and methods of treating subjects having a Serpina1 associated disease, such as a liver disorder.本發明係關於以Serpina1基因為靶向之RNAi劑,如雙股RNAi劑,以及使用該RNAi劑以抑制Serpina1之表現的方法及處置患有Serpina1相關疾病如肝臟病變之個體的方法。