In addition, a recent study showed that Shenzhiling oral liquid‐containing serum promotes the differentiation and maturation of OLs in Aβ42‐induced OLN‐93 cells by increasing the expression of Olig2 and NKX2.2, indicating a critical role of Olig2 and NKX2.2 in AD.24 The gene discussed is NKX2-2; the disease is Alzheimer disease.