CAMBRIDGE, Mass.--(BUSINESS WIRE)--Alnylam Pharmaceuticals, Inc. (Nasdaq: ALNY), a leading RNAi therapeutics company, announced today it has initiated dosing in a Phase I human clinical study with ALN-TTR01. The study is aimed at evaluating the safety and tolerability of ALN-TTR01 in patients with transthyretin (TTR)-mediated amyloidosis (ATTR), and is also designed to provide preliminary data on human proof of concept based on measurements of TTR serum levels. ALN-TTR01 is a systemically delivered RNAi therapeutic being developed for the treatment of ATTR, including familial amyloidotic polyneuropathy (FAP) and familial amyloidotic cardiomyopathy (FAC).