美股周一早盘，默沙东（MRK）下跌0.4%。该公司报告其每日一次PCSK9抑制剂恩利昔单抗（enlicitide）在他汀类药物基础上进一步降低低密度脂蛋白高达60%，疗效与注射剂相当，可能拓宽强化降脂治疗的可及性。

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