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作 者:徐艳文[1] 任秀莲[1] 刘颖[1] 曾艳红[1] 方丛[1] 高玲[1] 周灿权[1] 庄广伦[1]
机构地区:[1]中山大学附属第一医院生殖医学中心,广州510080
出 处:《中华妇产科杂志》2008年第8期576-580,共5页Chinese Journal of Obstetrics and Gynecology
基 金:广东省科技计划项目(2004834201002);广东省自然科学基金(07001648)
摘 要:目的探讨荧光原位杂交(FISH)技术不同方案用于染色体易位携带者胚胎植入前遗传学诊断(PGD)的效率。方法根据FISH检测方案的不同进行分组:采用全染色体涂抹探针对染色体易位携带者8个周期的109个卵母细胞第一极体进行诊断(A组),采用联合端粒和着丝粒探针对染色体易位携带者29个周期的357个卵裂球进行诊断(B组),比较两组的活检成功率、固定时细胞丢失率、无核细胞数等。结果A组的109个卵母细胞中72个受精,受精率为66.1%(72/109),B组的357个卵裂球中304个受精,受精率为85.2%(304/357),A组的受精率显著低于B组,差异有统计学意义(P〈0.05)。固定时细胞丢失率A组为9.6%(12/104),B组为1.6%(4/252),两组比较,差异也有统计学意义(P〈0.05)。杂交后核的无信号率A组为11.2%(10/89),B组为3.0%(7/233),两组比较,差异有统计学意义(P〈0.05)。A组的诊断率为72.5%(79/109),显著低于B组的89、8%(230/256),差异有统计学意义(P〈0.05)。A组的临床妊娠率和胚胎植入率分别为3/7和22.2%(4/18),均高于B组的30.4%(7/23)和15.7%(8/51),但差异均无统计学意义(P〉0.05)。结论FISH两种方案均可有效地进行染色体平衡易位的PGD,卵裂球PGD的诊断效率更高。Objective To compare the diagnostic efficiency between blastomere preimplantation genetic diagnosis (PGD) and polar body PGD for chromosomal translocation carriers. Methods Group A had 8 cycles using whole painting probes for the first polar body diagnosis, while group B had 29 cycles using two subtelomeric probes and one centromeric probe for the blastomere diagnosis. Results The fertilization rate of group A was significantly lower than group B [66. 1% (72/109) vs 85.2% (304/357), P 〈 0. 05]. There was no significant difference in the successful biopsy rate between two groups. However, group A had a significantly higher loss rate during fixation and higher no signal rate after fluorescence in situ hybridization [FISH, 9.6% (12/104) vs 1.6% (4/252), 11.2% (10/89)vs 3.0% (7/233) ]. Totally, the diagnostic efficiency in group A (72. 5% ,79/109 ) was significantly lower than that in group B( 89. 8% , 230/256, P 〈 0.05 ). Although both the clinical pregnancy rate ( 3/7 ) and implantation rate (22.2% ,4/18 ) of group A were higher, the differences were not statistically significant ( P 〉 0. 05 ). Conclusion Both methods can be used efficiently in the PGD for chromosomal translocation carriers. Blastomere PGD has a higher diagnostic rate.
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