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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Andrologyarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Andrology
Article . 2025 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
Andrology
Article . 2025
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Role of GPR55 receptor in bovine sperm capacitation

Authors: Raquel Lottero‐Leconte; Angela Lara; Jessica Plaza; Camila Arroyo‐Salvo; María Eugenia Bogetti; Amada Eugenia Ynsaurralde Rivolta; Franco Dellavalle; +8 Authors

Role of GPR55 receptor in bovine sperm capacitation

Abstract

Abstract Background Endocannabinoids like anandamide (AEA), among other lipids, are recognized signaling molecules that participate in reproductive events. Objectives Our aims were to characterize orphan G protein‐coupled receptor (GPR55) presence; investigate GPR55 activation by AEA and determine GPR55 role in the bovine sperm function. Materials and methods GPR55 presence was assessed by immunocytochemistry. Protein kinase A (pPKA) and PKC (pPKC) substrates, pERK1/2, G/F‐actin were determined by Western blotting, activation of RAC‐1 by pull‐down assay, F‐actin and acrosomal exocytosis by fluorescence microscopy, sperm motility by optic microscopy and computer‐aided sperm analysis and fertilizing ability by in vitro fertilization (IVF). Results We detected GPR55 in spermatozoa at T0, after incubation in non‐capacitating and capacitating (presence of AEA) conditions and upon release from oviductal epithelia. AEA induced an increase in pPKA and pPKC, while CID16020046 (CID), selective GPR55 antagonist, prevented this effect. Incubation with H89, PKA inhibitor, significantly decreased pPKC, while Gö6983, a PKC inhibitor, partially reduced pPKA. pPKA remained elevated at 15‐ and 45‐min incubation, while pPKC decreased at 15 and increased at 45 min. CID prevented pPKC increase at 5 and 45 min and decreased pPKA at 45 min. RAC‐1 and F‐actin increase induced by AEA was prevented by CID. Variations in two progressive motility kinematic parameters were observed with AEA and/or CID. Sperm pretreatment with AEA increased the rate of cleaved embryos and CID prevented this effect. Discussion We demonstrated that GPR55 activation by AEA induces time‐dependent signaling pathways involving pPKA and pPKC during bovine sperm capacitation. AEA regulates actin polymerization through GPR55 activation, suggesting the receptor participates in cytoskeleton remodeling, and yielded higher IVF rates. Also, sperm pre‐incubation with molecules like AEA involved in capacitation could improve the embryo development. Conclusion We have demonstrated GPR55 presence in bovine spermatozoa. The regulation of PKA and PKC and of molecules associated with cytoskeletal dynamics, such as RAC‐1 and actin, by GPR55 is closely related to sperm motility and acrosomal exocytosis.

Keywords

Male, Polyunsaturated Alkamides, Arachidonic Acids, Fertilization in Vitro, Spermatozoa, Cyclic AMP-Dependent Protein Kinases, Receptors, G-Protein-Coupled, Sperm Motility, Animals, Cattle, Female, Receptors, Cannabinoid, Sperm Capacitation, Protein Kinase C, Endocannabinoids, Signal Transduction

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
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