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机构地区:[1]深圳市罗湖区人民医院,深圳518001 [2]昆明理工大学生命科学与技术学院,昆明650500
出 处:《实验动物与比较医学》2013年第1期7-11,共5页Laboratory Animal and Comparative Medicine
基 金:国家自然科学基金项目(31071279);云南省科技创新人才计划项目(2011C1009)
摘 要:目的通过建立最佳的冷冻降温速率,研究红海海绵素A(1atrunculinA,LATA)对精子的冷冻保护作用。方法用冷冻液平衡后的ICR小鼠附睾精子置于液氮面上方不同的位置,用快速(-240℃/min)、中速(-109℃/min)、慢速(一41℃/min)和超陵速(-12℃/min)的降温速率分别冷冻5或10min后投入液氮冻存。结果在液氮上方冷冻5min或10min对小鼠精子的复苏活力没有影响。而用超慢速冷冻速率冻存精子的复苏活力显著高于其他组,中速冷冻速率保存的精子的复苏活力在各实验组中最低。用0.5mmol/L、1mmol/L、2mmol/L和4mmol/L的红海海绵素A处理小鼠精子后,再用趋陵速冷冻速率保存,结果用0.5mmol/L、1mmol/L和2mmol/L的红海海绵素A处理的精子未能提高精子的复苏活力,而高浓度的红海海绵素A(4mmol/L)反而降低了精子的复苏活力度。结论红海海绵素A对精子的冷冻保护作用值得商榷。Objective To evaluate the effect of latrunculin A on motility of spermatozoa combined with optimized cooling rate of cryopreservation. Methods ICR mouse epididymal spermatozoa balanced in freezing medium were frozen at fast (-240℃/min), medium (-109℃/min), slow (-41 ℃/min) and super slow (-12℃/min) cooling rate for 5 min or 10 min respectively, before being plunged into liquid nitrogen for storage. Results No difference of sperm motility was observed between spermatozoa frozen for 5 and 10 rain above liquid nitrogen at each cooling rate. Spermatozoa cryopreserved at super slow and medium cooling rate showed highest and lowest post-thaw motility respectively. ICR mouse spermatozoa were treated with 0.5 μmol/L, 1 μmol/L, 2 μmol/L and 4μmol/L Latrunculin A before freezing and then cryopreserved at super slow cooling rate. The result showed that treating mouse spermatozoa with 0.5 μmol/L, 1 μmol/L and 2 pμmol/L of Latrunculin A could not improve the motility of spermatozoa. However, high level (4 μmol/L) of Latrunculin A showed detrimental effect on ICR mouse sperm motility. Conclusion Cryopreservation proficiency of Latrunculin A on sperm is open to discussion.
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