A Treatment scheme of experimental timeline and Immunofluorescence staining of telogen backskin hair follicles (HF) for Integrin α6 (Itgα6, red), active Caspase 3 (aCas3, green) and DAPI (blue) in control (Ctr) and Bcl-2 inhibitor (ABT-199) treated mice. B: bulge, CH: club hair, DP: dermal papilla, HF: hair follicle, HG: secondary hair germ. Scale bar, 50 µm B Quantification of backskin HF with aCas3+ cells in bulge, hair germ and dermal papilla of Ctr and ABT-199 treated mice (n=4 mice biological replicates; mean ± standard deviation (SD); *** p<0.001, ns=not significant, two-way ANOVA test). nd=not detected. 