β-catenin in the Wnt signaling pathway has previously been identified as a necessary signaling marker for the growth of HFs [43], and fluorescence immunoassay showed that FITC-labeled fluorescence signals of Ki-67 and β-catenin in HFs treated with 10 μg/mL ADSC-Exos were more obvious (p < 0.05) (Figure S2C). The gene discussed is MKI67; the disease is Hand-foot syndrome.