Addition of Mitoquinone (MitoQ) to Fresh Human Sperm Enhances Sperm Motility without Attenuating Viability.

Simple Summary: When a couple faces infertility challenges like sperm motility issues, they often visit fertility clinics for assistance. Poor sperm motility can delay fertilization, making natural conception difficult. In an andrology laboratory, embryologists test the semen sample. Before assisted reproduction procedures, embryologists usually perform a group of steps to prepare the semen sample and to isolate the best sperms. These technical steps might harm the sperms, because they become susceptible to something so called; oxidative stress, which occurs when too many harmful molecules called free radicals accumulate in the test tube, leading to cell damage and death. A group of chemicals called antioxidants can neutralize these free radicals. The researchers in this study investigated the therapeutic effects of Mitoquinone, which is a mitochondria-targeted antioxidant, on the motility of human sperms exposed to oxidative stress during in vitro procedures. Mitoquinone as an antioxidant might have therapeutic potential for sperms' oxidative-damage-associated disorders. This investigation paves the route for future research to confirm the beneficial role of Mitoquinone supplementation in improving and enhancing sperm quality during in vitro processes in the andrology laboratories. The preparation of human sperm in an andrology laboratory subjects it to oxidative stress. Reactive oxygen species are produced by mitochondria, making it susceptible to oxidative damage; hence, mitochondria-targeted antioxidants like Mitoquinone (MitoQ) might have therapeutic potential for oxidative-damage-associated disorders. The current research aims to establish whether MitoQ has any positive effects during in vitro preparation of fresh human sperm. Viability and motility are evaluated to determine the effective MitoQ concentration and to assess whether MitoQ supplementation is affected by sperm concentration by incubating normospermia semen samples at 37 °C for 2 h and 4 h, respectively. The effect of semen centrifugation following supplementation of 20 × 106 sperm/mL with 200 nM MitoQ is also assessed by measuring viability, motility and sperm DNA fragmentation. The best sperm motility is achieved after 2 h of incubation with 200 nM MitoQ at 37 °C. Sperm concentration of 20 × 106 sperm/mL is the best concentration where 200 nM MitoQ works efficiently. For semen centrifugation at 300× g for 20 min, supplementation with 200 nM MitoQ shows higher sperm motility. The current results demonstrate that MitoQ supplementation during in vitro human semen preparation procedures positively affects fresh sperm motility without affecting viability or increasing DNA fragmentation. [ABSTRACT FROM AUTHOR]