大Y染色体的细胞遗传学研究及其临床效应分析

目的: 探讨大Y染色体与不良妊娠、性腺发育不全和性反转综合征等临床效应的相关性。方法: 采用外周血淋巴细胞培养、常规染色体标本制备和G显带技术,对患者进行核型分析。结果: 在检出的9例大Y染色体患者中,5例其妻有不良妊娠史(包括自然流产、胚胎停止发育、死胎等),3例性腺发育不全,1例46,XY男性性反转综合征。结论: 大Y染色体与不良妊娠、性腺发育不全和性反转综合征等临床效应有一定的相关性。

Cytogenetic study and its clinical effect analysis of long Y chromosome

Objective: This study was designed to characterize the ultrastructure of the coccoid Helicobacter pylori(H. pylori) forms in the tissues of carcinoma.Methods: Transmission electron microscopy(TEM) technique was used to examine the structure of coccoid H. pylori in 4 cases of gastric carcinoma and 2 cases of esophageal carcinoma.Results: It was found that the coccoid H. pylori were scattered in cancer nest and cancer interspace,some of which enterded cancer cells,macrophages and other cells.The coccoid H. pylori appeared to be similar to the L-forms of other bacteria with varying cell shape and size,different cytoplasmic electron densities and defects in cell wall.Two types of coccoid H. pylori could be distinguished in the tissues of carcinoma by TEM.Type A was smaller with higher electron density in the cytoplasma,and flagellation on the cell membrane,suggesting that it could be viable.However,the type B was larger with lower electron density in the cytoplasma,and no flagellation on the cell membrane,suggesting that it could be a degenerative form.Conclusions: The coccoid forms of H.pulori still have certain degree of viability,thus they may play an important role in the transmission of H. pylori,the relapse of H. pylori related disease after treatment and the development of the related carcinoma.