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Manipulation of bicarbonate concentration in sperm capacitation media improves in vitro fertilisation output in porcine species

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dc.contributor.authorSoriano-Úbeda, Cristina
dc.contributor.authorRomero Aguirregomezcorta, Jon
dc.contributor.authorMatas Parra, Carmen
dc.contributor.authorVisconti, Pablo E.
dc.contributor.authorGarcía Vázquez, Francisco Alberto
dc.contributor.departmentAnatomía y Anatomía Patológica Comparada
dc.contributor.otherFacultad de Veterinaria
dc.date.accessioned2026-01-16T07:32:47Z
dc.date.available2026-01-16T07:32:47Z
dc.date.copyright© 2019 , The Author(s).
dc.date.issued2019-03-11
dc.description.abstractBackground. The in vivo concentration of bicarbonate (HCO3−), one of the essential sperm capacitating effectors, varies greatly in the different environments sperm go through from cauda epididymis to the fertilisation site. On the contrary, porcine in vitro sperm capacitation and fertilisation media usually contains a standard concentration of 25 mmol/L, and one of the main problems presented is the unacceptable high incidence of polyspermy. This work hypothesised that by modifying the HCO3− concentration of the medium, the output of in vitro sperm capacitation and fertilisation could be increased. Results: Once exposed to the capacitation medium, the intracellular pH (pHi) of spermatozoa increased immediately even at low concentrations of HCO3−, but only extracellular concentrations of and above 15 mmol/L increased the substrates protein kinase A phosphorylation (pPKAs). Although with a significant delay, 15 mmol/L of HCO3− stimulated sperm linear motility and increased other late events in capacitation such as tyrosine phosphorylation (Tyr-P) to levels similar to those obtained with 25 mmol/L. This information allowed the establishment of a new in vitro fertilisation (IVF) system based on the optimization of HCO3− concentration to 15 mmol/L, which led to a 25.3% increment of the viable zygotes (8.6% in the standard system vs. 33.9%). Conclusions: Optimising HCO3− concentrations allows for establishing an IVF method that significantly reduced porcine polyspermy and increased the production of viable zygotes. A concentration of 15 mmol/L of HCO3− in the medium is sufficient to trigger the in vitro sperm capacitation and increase the fertilisation efficiency in porcine.
dc.formatapplication/pdf
dc.format.extent15
dc.identifier.eissn2049-1891
dc.identifier.urihttp://hdl.handle.net/10201/187450
dc.languageeng
dc.publisherBioMed Central
dc.relationThis work was supported by the Spanish Ministry of Economy and Competitiveness (MINECO), the European Regional Development Fund (FEDER), Grants AGL2012–40180-C03–01-02 and AGL2015–66341-R), Fundación Séneca (20040/GERM/16) and by a grant R01-HD-038082 (to P.E.V.) from the National In stitutes of Health (NIH), USA.
dc.relation.publisherversionhttps://link.springer.com/article/10.1186/s40104-019-0324-y
dc.rightsAttribution 4.0 International*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectBoar
dc.subjectMonospermy
dc.subjectPKA
dc.subjectAdcy10
dc.subject.odsNo relacionado con ningún objetivo de desarrollo sostenible
dc.titleManipulation of bicarbonate concentration in sperm capacitation media improves in vitro fertilisation output in porcine species
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublicationes
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relation.isAuthorOfPublicationa5bdc1c7-b6e8-4685-99cc-d8a3e9761b5f
relation.isAuthorOfPublication24843fe8-fa96-4462-a6c9-b3a817588cbf
relation.isAuthorOfPublication.latestForDiscovery3cc83bb3-8c44-471d-bc14-7d7dff677509
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