Using DNA samples from 11 members of a Saudi Arabian family that had inherited the rare condition, the researchers found that a mutation in the P2Y5 gene prevented proteins called growth receptors on hair follicle cells from forming properly.

• 来自一个沙特阿拉伯家族的11个患者都遗传了这个罕见的疾病，研究人员研究后发现，他们的DNA样本在p2y5基因上出现了基因突变，正是这种突变阻止了毛囊细胞中的生长受体蛋白质的形成。