Aging and aneuploidy: evidence for the preferential involvement of the inactive X chromosome
作者:
M.A. Abruzzo,
M. Mayer,
P.A. Jacobs,
期刊:
Cytogenetic and Genome Research
(Karger Available online 1985)
卷期:
Volume 39,
issue 4
页码: 275-278
ISSN:1424-8581
年代: 1985
DOI:10.1159/000132157
出版商: S. Karger AG
数据来源: Karger
摘要:
It has been known for some time that there is an association between chronological aging and X-chromosome aneuploidy in peripheral blood lymphocyte cultures from females. In an attempt to elucidate the mechanism of X-chromosome aneuploidy in aging females, we used a BrdU late-labeling technique to determine the X-inactivation pattern in 45, X and 47, XXX lymphocytes of older women. In 50 of 58 X-aneuploid cells the inactive X chromosome was missing or extra. This implies that either the inactive X has a special propensity for mitotic errors or mitotic errors occur at random but subsequent selection is less stringent against cells with a missing or additional inactive X chromosome than against aneuploid cells involving the active X chromosome. Evidence is presented in favor of the former hypothesis.
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