title: Chromosomes in old age: a six year longitudinal study.
abstract: This first longitudinal study on aged subjects confirms previous cross-sectional observations of increasing aneuploidy with advancing age in women but not in men. In this study of 17 aged twins (mean age 89.7 years), 11 women and 6 men, spanning an interval of approximately 6 years between examinations, only women showed a significant increase in hypodiploidy (also hyperdiploidy and monosomy C). This increase in hypodiploidy was not due to a high frequency of chromosome loss in a few subjects but rather was exhibited by most of the subjects. While men showed a loss in G-group chromosomes during this 6-year interval, that loss was not statistically significant. These findings confirm for the first time by means of longitudinal follow-up that women and not men, even in the ninth decade of life, show a significant increase in hypodiploidy.
mesh_terms: D000368:Aged; D000375:Aging; D000782:Aneuploidy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D011247:Pregnancy; D012730:Sex Chromosomes / Q000032:analysis; D012737:Sex Factors; D014427:Twins