4.6 Review

On the origins and fate of chromosomal abnormalities in human preimplantation embryos: an unsolved riddle

期刊

MOLECULAR HUMAN REPRODUCTION
卷 28, 期 4, 页码 -

出版社

OXFORD UNIV PRESS
DOI: 10.1093/molehr/gaac011

关键词

chromosomal mosaicism; aneuploidy; PGT-A; human embryos; spindle assembly checkpoint; preimplantation genetic testing for aneuploidy

资金

  1. Fonds voor Wetenschappelijk Onderzoek (FWO) Vlaanderen [G017218N]
  2. Methusalem grant

向作者/读者索取更多资源

About 8 out of 10 human embryos obtained in vitro have chromosomal abnormalities. Chromosomal mosaicism caused by mitotic origin abnormalities has sparked debate and confounds preimplantation genetic testing for aneuploidy (PGT-A). This article focuses on post-zygotic chromosomal abnormalities leading to mosaicism and summarizes the rates of such abnormalities at different developmental stages. Hypotheses on the mechanisms at work in early human development are also discussed.
About 8 out of 10 human embryos obtained in vitro harbour chromosomal abnormalities of either meiotic or mitotic origin. Abnormalities of mitotic origin lead to chromosomal mosaicism, a phenomenon that has sparked much debate lately as it confounds results obtained through preimplantation genetic testing for aneuploidy (PGT-A). PGT-A in itself is still highly debated, not only on the modalities of its execution but also on whether it should be offered to patients at all. We will focus on post-zygotic chromosomal abnormalities leading to mosaicism. First, we will summarize what is known about the rates of chromosomal abnormalities at different developmental stages. Next, based on the current understanding of the origin and cellular consequences of chromosomal abnormalities, which is largely based on studies on cancer cells and model organisms, we will offer a number of hypotheses on which mechanisms may be at work in early human development. Finally, and very briefly, we will touch upon the impact our current knowledge has on the practice of PGT-A. What is the level of abnormal cells that an embryo can tolerate before it loses its potential for full development? And is blastocyst biopsy as harmless as it seems?

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据