PASADENA, Calif.–(BUSINESS WIRE)–Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) today announced interim topline data from a Phase 1/2a clinical trial of ARO-DIMER-PA, the company’s first investigational RNA interference (RNAi) therapeutic dimer being developed as a potential treatment for atherosclerotic cardiovascular disease (ASCVD) due to mixed hyperlipidemia. ARO-DIMER-PA is designed to silence expression of both proprotein convertase subtilisin kexin 9 (PCSK9) and apolipoprotein C3 (APOC