Tyrosine phosphorylation signaling regulates Ca2+ entry by affecting intracellular pH during human sperm capacitation

2018 ◽  
Vol 234 (4) ◽  
pp. 5276-5288 ◽  
Author(s):  
Nicolás Gastón Brukman ◽  
Sol Yanel Nuñez ◽  
Lis del Carmen Puga Molina ◽  
Mariano Gabriel Buffone ◽  
Alberto Darszon ◽  
...  
Keyword(s):  
Tyrosine Phosphorylation ◽  
Intracellular Ph ◽  
Human Sperm ◽  
Sperm Capacitation

Sperm Proteasome Activity Is Necessary for Tyrosine Phosphorylation During Human Sperm Capacitation: Possible Role of P42 Protein.

2012 ◽  
Vol 87 (Suppl_1) ◽  
pp. 425-425
Author(s):  
Lidia M. Zuñiga ◽  
Kely Ordenes ◽  
Emilce S. Diaz ◽  
Patricio Morales
Keyword(s):  
Tyrosine Phosphorylation ◽  
Human Sperm ◽  
Proteasome Activity ◽  
Sperm Capacitation

Luteinizing hormone modulates intracellular calcium, protein tyrosine phosphorylation and motility during human sperm capacitation

2017 ◽  
Vol 483 (2) ◽  
pp. 834-839 ◽  
Author(s):  
Aideé S. López-Torres ◽  
María E. González-González ◽  
Esperanza Mata-Martínez ◽  
Fernando Larrea ◽  
Claudia L. Treviño ◽  
...  
Keyword(s):  
Luteinizing Hormone ◽  
Intracellular Calcium ◽  
Tyrosine Phosphorylation ◽  
Human Sperm ◽  
Protein Tyrosine Phosphorylation ◽  
Sperm Capacitation ◽  
Protein Tyrosine

scholarly journals Cholecystokinin receptors regulate sperm protein tyrosine phosphorylation via uptake of HCO3−

Reproduction ◽  
2015 ◽  
Vol 150 (4) ◽  
pp. 257-268 ◽  
Author(s):  
Yuchuan Zhou ◽  
Yanfei Ru ◽  
Huijuan Shi ◽  
Yanjiao Wang ◽  
Bin Wu ◽  
...  
Keyword(s):  
Tyrosine Phosphorylation ◽  
Human Sperm ◽  
Peptide Hormone ◽  
Mature Sperm ◽  
Protein Tyrosine Phosphorylation ◽  
Sperm Capacitation ◽  
Protein Tyrosine ◽  
Cck Receptors ◽  
Cck2 Receptor

Cholecystokinin (CCK), a peptide hormone and a neurotransmitter, was detected in mature sperm two decades ago. However, the exact role of CCK and the types of CCK receptors (now termed CCK1 and CCK2) in sperm have not been identified. Here, we find that CCK1 and CCK2 receptors are immunolocalized to the acrosomal region of mature sperm. The antagonist of CCK1 or CCK2 receptor strongly activated the soluble adenylyl cyclase/cAMP/protein kinase A signaling pathway that drives sperm capacitation-associated protein tyrosine phosphorylation in dose- and time-dependent manners. But these actions of stimulation were abolished when sperm were incubated in the medium in the absence of HCO3−. Further investigation demonstrated that the inhibitor of CCK1 or CCK2 receptor could accelerate the uptake of HCO3−and significantly elevate the intracellular pH of sperm. Interestingly, the synthetic octapeptide of CCK (CCK8) showed the same action and mechanism as antagonists of CCK receptors. Moreover, CCK8 and the antagonist of CCK1 or CCK2 receptor were also able to accelerate human sperm capacitation-associated protein tyrosine phosphorylation by stimulating the influx of HCO3−. Thus, the present results suggest that CCK and its receptors may regulate sperm capacitation-associated protein tyrosine phosphorylation by modulating the uptake of HCO3−.

scholarly journals Signal transduction mechanisms involved in in vitro ram sperm capacitation

Reproduction ◽  
2006 ◽  
Vol 132 (5) ◽  
pp. 721-732 ◽  
Author(s):  
Patricia Grasa ◽  
José Álvaro Cebrián-Pérez ◽  
Teresa Muiño-Blanco
Keyword(s):  
Tyrosine Phosphorylation ◽  
Calcium Influx ◽  
Calcium Entry ◽  
Calcium Entry Blocker ◽  
Protein Tyrosine Phosphorylation ◽  
Sperm Capacitation ◽  
Protein Tyrosine ◽  
Entry Blocker ◽  
Ram Sperm

We validate the chlortetracycline (CTC) technique for the evaluation of capacitation and acrosome reaction-like changes in ram sperm, carrying out a double estimation of the acrosome status after treatment with lysophosphatidylcholine, using fluorescein isocyanate (FITC)-RCA/ethidium homodimer 1 (EthD-1) and CTC/EthD-1. Highly consistent results and a positive correlation between the results of acrosome-reacted sperm evaluated with both techniques were obtained. In this study, we evaluate the effects of ram sperm capacitation of BSA, Ca2+, NaHCO3and cAMP agonists and their influence on the associated protein tyrosine phosphorylation. We found a time-dependent increase in capacitation related to protein tyrosine phosphorylation, either in the absence or the presence of BSA. The addition of an increasing concentration of cholesterol to samples containing BSA did not influence results. The effect of bicarbonate was concentration-dependent, with a significantly lowered value of non-capacitated sperm in the presence 18 and 25 mM. The addition of extracellular calcium did not significantly increase either the proportion of capacitated sperm or the protein tyrosine phosphorylation signalling, although a significantly higher value of acrosome-reacted sperm was found in samples containing 4 mM Ca2+. cAMP agonists increased capacitated sperm and protein tyrosine phosphorylation signalling. The inhibition of protein kinase A by H-89 caused a decrease in sperm capacitation. Addition of a calcium-entry blocker (Verapamil; Sigma) did not influence results, which suggests that the calcium entry blocker was unable to inhibit the calcium influx associated with capacitation in ram sperm. Our findings might benefit our understanding of the biochemical mechanisms involved in mammalian sperm capacitation and ultimately, fertility.

Control of superoxide and nitric oxide formation during human sperm capacitation

2009 ◽  
Vol 46 (10) ◽  
pp. 1420-1427 ◽  
Author(s):  
Eve de Lamirande ◽  
Geneviève Lamothe ◽  
Michèle Villemure
Keyword(s):  
Nitric Oxide ◽  
Human Sperm ◽  
Sperm Capacitation ◽  
Oxide Formation ◽  
Nitric Oxide Formation
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