Overexpression of junctional adhesion molecule A correlates with HF remodeled and hair formation. Hair density (A), hair length (D), the number of twisted HF (C) and hair diameter (B) in the three groups were dissected and assayed. Statistical results revealed a marked difference among the three groups. ∗∗, p < .01. Abbreviations: HF, hair follicle; KD, knockdown; MSC, mesenchymal stem cell; OV, overexpression.