Effects of mitochondria‐associated Ca2+ transporters suppression on oocyte activation

Oocyte activation deficiency leads to female infertility. [Ca 2+ ] i oscillations are required for mitochondrial energy supplement transition from the resting to the excited state, but the underlying mechanisms are still very little known. Three mitochondrial Ca 2+ channels, Mitochondria Calcium Uniporter (MCU), Na + /Ca 2+ Exchanger (NCLX) and Voltage‐dependent Ca 2+ Channel (VDAC), were deactivated by inhibitors RU360, CGP37157 and Erastin, respectively. Both Erastin and CGP37157 inhibited mitochondrial activity significantly while attenuating [Ca 2+ ] i and [Ca 2+ ] m oscillations, which caused developmental block of pronuclear formation. Thus, NCLX and VDAC are two mitochondria‐associated Ca 2+ transporter proteins regulating oocyte activation, which may be used as potential targets to treat female infertility. Significance of the Study NCLX and VDAC are two mitochondria‐associated Ca 2+ transporter proteins regulating oocyte activation.