zǎolǎosù / jīyīn / de / tūbiàn / yǔ / zǎofāxìng / ā'ěrcíhǎimòbìng / mìqiè / xiāngguān早老素基因的突变与早发性阿尔茨海默病密切相关。Mutations in the presenilin gene are closely related to early-onset Alzheimer's disease.