Transient Sperm Starvation Improves the Outcome of Assisted Reproductive Technologies.

TitleTransient Sperm Starvation Improves the Outcome of Assisted Reproductive Technologies.
Publication TypeJournal Article
Year of Publication2019
AuthorsNavarrete FA, Aguila L, Martin-Hidalgo D, Tourzani DA, Luque GM, Ardestani G, Garcia-Vazquez FA, Levin LR, Buck J, Darszon A, Buffone MG, Mager J, Fissore RA, Salicioni AM, Gervasi MG, Visconti PE
JournalFront Cell Dev Biol
Volume7
Pagination262
Date Published2019
ISSN2296-634X
Abstract

To become fertile, mammalian sperm must undergo a series of biochemical and physiological changes known as capacitation. These changes involve crosstalk between metabolic and signaling pathways and can be recapitulated . In this work, sperm were incubated in the absence of exogenous nutrients (starved) until they were no longer able to move. Once immotile, energy substrates were added back to the media and sperm motility was rescued. Following rescue, a significantly higher percentage of starved sperm attained hyperactivated motility and displayed increased ability to fertilize when compared with sperm persistently incubated in standard capacitation media. Remarkably, the effects of this treatment continue beyond fertilization as starved and rescued sperm promoted higher rates of embryo development, and once transferred to pseudo-pregnant females, blastocysts derived from treated sperm produced significantly more pups. In addition, the starvation and rescue protocol increased fertilization and embryo development rates in sperm from a severely sub-fertile mouse model, and when combined with temporal increase in Ca ion levels, this methodology significantly improved fertilization and embryo development rates in sperm of sterile CatSper1 KO mice model. Intracytoplasmic sperm injection (ICSI) does not work in the agriculturally relevant bovine system. Here, we show that transient nutrient starvation of bovine sperm significantly enhanced ICSI success in this species. These data reveal that the conditions under which sperm are treated impact post-fertilization development and suggest that this "starvation and rescue method" can be used to improve assisted reproductive technologies (ARTs) in other mammalian species, including humans.

DOI10.3389/fcell.2019.00262
Alternate JournalFront Cell Dev Biol
PubMed ID31750304
PubMed Central IDPMC6848031