Yak follicular fluid can activate autophagy in YCCs. (A) Expression of autophagy-related genes LC3 (A1), ATG5 (A2), Beclin1 (A3), ATG12 (A4) and P62 (A5) in YCCs using a qPCR assay. (B) Western blot analysis of protein expression in YCCs (C: control, E: Yak follicular fluid exosomes) (See Figure S2). (C) Quantitative results of Western blot analysis for LC3II/LC3I (C1), P62 (C2), ATG5-ATG12(C3) and Beclin1 (C4). Data are expressed as the mean ± SD. n = 6. NS means no significant difference. * p < 0.05 and ** p < 0.01 indicate significant differences between the yak follicular fluid exosome treatments and the control.