应用荧光原位杂交技术对性染色体异常进行诊断

目的　评价荧光原位杂交技术 (FISH)在染色体异常核型分析中的应用价值。方法　应用 X着丝粒探针、Y染色体区域特异性探针 (PY3.4)对 8例外生殖器及第二性征发育不全、原 (继 )发闭经、无精子等病因前来就诊的患者及 2例正常男、女外周血进行 G显带分析及荧光原位杂交 ,杂交后用 Olympus BX6 0荧光显微镜观察玻片并照相。结果　 FISH结果与原 G显带核型一致 ,8例患者中 1例核型为 45 ,X0 ;1例为 46 ,XX/ 45 ,X0 ;1例为 45 ,X0 / 47,XXX;1例为 46 ,Xi(Xq) ;1例为 45 ,X0 / 46 ,Xi(Xq) ,诊断为先天性卵巢发育不全 ;2例核型为 47,XXY,诊断为先天性睾丸发育不全 ;1例生殖器为男性的患者核型为 46 ,XX,诊断为性反转。结论　 FISH技术可用于染色体异常的分析 ,能分析一些显带技术不易分辨的异常。由于 FISH技术在间期细胞中显示杂交信号 ,在极短的时间内可检测大量细胞 ,对于一些中期分裂相有限、分散不好的染色体以及那些不易发现的嵌合体等方面 ,有重要的应用价值。

Application of FISH technique to the analysis of chromosome abe rration

Objective In order to find the application value of FISH (fluorescence in situ hybridization) in chromosome abnormalities analysis.Methods Fluorescence in situ hybridization using X alpha satellite,Y (PY3.4) probe labeled with biotin and karyotype analysis were made in two normal persons and 8 cases of dysgenitalism.Results The result of FISH was consistent with G-banding.Conclusion FISH is very useful for chromosome aberration study,especially for interphase cell and very small portions of chromosome aberration which through G-banding can′t be found.