Cryoprotective Effect of Four Penetrating Cryopro-tectants on Rhesus Monkey (Macaca mulatta) Spermatozoa Cryopreservation

The present study aimed to examine four cryoprotectants:glycerol,dimethyl sulfoxide,ethylene glycol and propylene glycol on rhesus monkey sperm cryopreservation.Frozen-thawed sperm cryo-survival and function was evaluated by sperm motility,plasma membrane integrity and acrosome integrity,and sperm plasma membrane and acrosome status was determined by nuclei stain Hoechst 33258 and Fluorescein isothiocyanate-conjugated peanut agglutinin (FITC-PNA).The result showed that:for the ability of protection on post-thaw sperm motility,glycerol (47.3±5.7%) and ethylene glycol (44.8±6.7%)> dimethyl sulfoxide (22.9±0.9%)> ethylene glycol (0±0%);for the ability of protection on sperm plasma membrane integrity,glycerol (54.8±3.2%) and ethylene glycol (54.0±6.7%)> dimethyl sulfoxide (37.5±7.0%)> ethylene glycol (28.3±6.5%);for the ability of protection on sperm acrosome integrity,glycerol (82.2±2.4%) and ethylene glycol (82.4±2.4%)> dimethyl sulfoxide (68.7±5.7%) and ethylene glycol (72.3±3.5%) (P