Mechanistic study on PQQ improving the quality of aged bovine oocytes and early embryonic developmental potential via Nrf2-mediated redox signaling. - You BY; Wu HK; Zhou XY; Zhao JH; Cheng BW; Hu JS; Xu DR; Lu YX; Wang BB; Yan CL; Gao QS; Liu HX; et al. (Cellular signalling, 2026)