The utilization of fish embryos in toxicity testing of hazardous chemicals has recently been adopted in order to satisfy stricter rules and regulations related to using adult animals in toxicity testing. This paper pr...The utilization of fish embryos in toxicity testing of hazardous chemicals has recently been adopted in order to satisfy stricter rules and regulations related to using adult animals in toxicity testing. This paper presents optimising steps towards improving zebra fish embryo production in the laboratory. Culture conditions were maintained in the aquaria as stipulated in the OECD draft proposal for a new guideline on fish embryo tests. Furthermore, a sequence of steps were adopted and followed to improve upon previous work done in the lab in 2006. About 200 eggs were produced in one spawn trap within an hour of onset of light, an improvement over the 50 - 60 eggs produced in the previous work. This result demonstrates that with the right culture conditions and proper optimisation of procedure the required number of embryos needed for toxicity testing can be obtained.展开更多
The current status and importance of preserving fish germplasm resources were described. The basic principle of cryobiology and its application potentials in preservation of aquatic germplasm resources were examined. ...The current status and importance of preserving fish germplasm resources were described. The basic principle of cryobiology and its application potentials in preservation of aquatic germplasm resources were examined. The mechanism of cryodamage was discussed. The recent advances and major problems in finfish gamete and embryo cryopreservation were reviewed. The prospects for cryopreservation research in fish gametes and embryos were looked into. The important research directions in cryopreservation of aquatic organisms were proposed.展开更多
目的应用荧光原位杂交(fluorescence in situ hybridization,FISH)方法对胚胎停育的绒毛组织进行分析,明确胚胎停育与染色体数目异常的情况。方法选择针对13、16、18、21、22、X、Y染色体特异性荧光探针,应用FISH方法,对154例胚胎停育...目的应用荧光原位杂交(fluorescence in situ hybridization,FISH)方法对胚胎停育的绒毛组织进行分析,明确胚胎停育与染色体数目异常的情况。方法选择针对13、16、18、21、22、X、Y染色体特异性荧光探针,应用FISH方法,对154例胚胎停育的绒毛组织中的染色体数目进行分析,并了解胚胎停育患者绒毛染色体数目异常情况及其与患者年龄及流产次数的差异。结果 1154例胚胎停育患者染色体数目异常56例(36.4%),其中,常染色体三体40例(71.4%),多倍体4例(7.1%),45,XO 12例(21.4%)。2绒毛染色体数目异常患者的年龄[(32.14±5.21)岁]与染色体数目正常患者的年龄[(29.49±4.07)岁]比较,差异有统计学意义(u=2.145,P<0.05)。3流产次数2次及以上的染色体数目异常发生率(44.8%)高于流产次数为1次的发生率(25.4%),差异有统计学意义(χ2=6.19,P<0.05)。结论染色体数目异常是胚胎停育的重要发病因素,其中常染色体三体最多见;对2次及以上的流产患者,更应关注是否有染色体异常的发生。展开更多
文摘The utilization of fish embryos in toxicity testing of hazardous chemicals has recently been adopted in order to satisfy stricter rules and regulations related to using adult animals in toxicity testing. This paper presents optimising steps towards improving zebra fish embryo production in the laboratory. Culture conditions were maintained in the aquaria as stipulated in the OECD draft proposal for a new guideline on fish embryo tests. Furthermore, a sequence of steps were adopted and followed to improve upon previous work done in the lab in 2006. About 200 eggs were produced in one spawn trap within an hour of onset of light, an improvement over the 50 - 60 eggs produced in the previous work. This result demonstrates that with the right culture conditions and proper optimisation of procedure the required number of embryos needed for toxicity testing can be obtained.
文摘The current status and importance of preserving fish germplasm resources were described. The basic principle of cryobiology and its application potentials in preservation of aquatic germplasm resources were examined. The mechanism of cryodamage was discussed. The recent advances and major problems in finfish gamete and embryo cryopreservation were reviewed. The prospects for cryopreservation research in fish gametes and embryos were looked into. The important research directions in cryopreservation of aquatic organisms were proposed.
