46,XY女性和47,XYY女性的分子遗传学分析

采用Y-DNA特异性探针对4例46,XY女性和1例47,XYY女性进行Southern印迹分析,结果表明除1例46,XY女性有pDP34检测片段丢失外,其他46,XY女性和47,XYY女性均无任何可检测Y-DNA片段丢失。X-Y异常交换学说不能解释这些ZFY阳性的46,XY女性和47,XYY女性的病因,提示可能存在其他遗传机理。本文就基因突变、性腺受体缺陷等可能发病机理进行探讨。

A Molecular Analysis of Females with 46,XY or 47,XYY Karyotype

In this paper, 4 females of 46,XY and one of 47,XYY karyotype were studied by Southern blotting using 10 Y-DNA probes. The results showed that 3 cases of 46,XY and the one 47,XYY had not lost any Y-specific fragment, while one 46, XY had lost a 15 kb Y-specific fragment, as detected by pDP34. The cause of these 46,XY and 47,XYY karyotypes could not be explained by the theory of X-Y unequal exchange in meiosis. It was postulated that an alternative genetic mechanism, such as gene mutation or defective gonad receptor, might be related to sex reversion in these patients.