摘要
Test-yolk缓冲液被应用于精子的短时期冷藏,可以提高精子的体外受精能力。过去的冷藏方法中保留了精浆。本实验比较了在卵黄液短期保存精液方法中去除精浆和保留精浆两种情况下大猩猩精子的体外受精能力和运动能力。体外受精能力以去透明带地鼠卵穿透试验来评价,精子运动能力以计算机辅助分析系统定量分析。精液标本取自5只人工饲养的成年大猩猩,12例标本用于卵穿透试验,22例用于运动分析。冰浴过夜保存于test-yolk缓冲液后活动精子百分率下降26.9%~30.9%,去除精浆的精子运动速度显著高于保留了精浆的精子,直线速度(VSL、P<0.01),曲线运动速度(VCL,P<0.01),头部侧向位移(ALH,P<0.05);并且卵穿透试验结果显示前者精子穿卵率和平均每卵穿入精子数均高于后者(P<0.01)。本实验结果提示∶在test-yolk缓冲液的精子短期冷藏过程中,去除精浆更有利于精子受精能力和运动速度的保存。
ouldKG,PhythyonSYerkesPrimateResearchCenterofEmoryUnivesrsityShort-termpreservationofspermintest-yolkbufercanenhancethefertilizingcapaci-bilityofsperm.Seminalplasmawasnotremovedintheprevioursstorage.Thefertilizingca-pacibilityofchimpanzeespermassayedbyzona-freehamstereggpenetraationtest(SPA)andthemotioncharacteristicsofthespermmeasuredwithcomputeraidedspermmotionanalysissystem(CASA)werecomparedbetweenthespermovernihgtstoredinyolkbuferwithandwithoutseminalplasma.Thesemenspecimenswerecolectedfrom5adultchimpanzeeshousedindoor,12forSPAand22forCASA.Thepercentageofmotilespermatozoawasde-creased26.9-30.9%afterovernightstoredinicewater.Paireddatashowedthatthespeedsofspermstoredwithoutseminalplasmaweresignificantlyhigherthanthoseofsperminsim-inalplasma,VSL(P<0.001),VCL(P<0.01),ALH(P<0.05);andSPAout-comefromplasma-freespermhadahigherpenetrationrateandthehighernumberofpenetratedspermpereggthanthelater(P<0.01).Thisstudysuggeststhatremovalofseminalplasmainthespermshort-termstorageinyolkbuferprovideanimprovementinpotentialofinvitrofer-tilizationofspermandinspermmotilityaswel.