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PubMed · 10783363

Enhancement of zona binding using 2-hydroxypropyl- beta-cyclodextrin.

J Parinaud·G Vieitez·C Vieu·X Collet·B Perret
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Abstract

Since membrane cholesterol depletion is known to play an important role in sperm capacitation, we have investigated the effect of 2-hydroxypropyl-beta-cyclodextrin, a cyclic oligosaccharide that mediates cholesterol efflux, on sperm functions. Sperm treatment with cyclodextrin did not affect the motility patterns but induced an increase in sperm binding to zona pellucida (24 +/- 5 versus 13 +/- 4 in control, P < 0.01). Cyclodextrin treatment was associated with an increase in spontaneous acrosome reaction (32 +/- 8% versus 22 +/- 4% in controls after a 4 h incubation, P < 0.05; 61 +/- 10% versus 50 +/- 11% in controls after a 24 h incubation, NS) but with a decrease in acrosome response to ionophore challenge (44 +/- 5% versus 51 +/- 3% in controls, P < 0.05). Concerning cell sterols, cyclodextrin induced a rapid and dramatic fall in the cholesterol and desmosterol content of spermatozoa. We conclude that cyclodextrin is a powerful capacitating agent, but since it induces an increase in spontaneous acrosome loss, it needs to be further evaluated before routine use in assisted reproductive technology media.

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2-Hydroxypropyl-beta-cyclodextrinAcrosome ReactionAdultCholesterolCyclodextrinsDesmosterolHumansIn Vitro TechniquesMalePhospholipidsSperm MotilitySpermatozoaZona Pellucidabeta-CyclodextrinsJournal Article

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J Parinaud, G Vieitez, C Vieu, X Collet, B Perret. 2000. Enhancement of zona binding using 2-hydroxypropyl- beta-cyclodextrin.. https://doi.org/10.1093/humrep%2F15.5.1117

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2-Hydroxypropyl-beta-cyclodextrin↗