Reduced ability to recover from spindle disruption and loss of kinetochore spindle assembly checkpoint proteins in oocytes from aged mice

Yan Yun, Janet E. Holt, Simon I.R. Lane, Eileen A. McLaughlin, Julie A. Merriman, Keith T. Jones

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Currently, maternal aging in women, based on mouse models, is thought to raise oocyte aneuploidy rates, because chromosome cohesion deteriorates during prophase arrest, and Sgo2, a protector of centromeric cohesion, is lost. Here we show that the most common mouse strain, C57Bl6/J, is resistant to maternal aging, showing little increase in aneuploidy or Sgo2 loss. Instead it demonstrates significant kinetochore-associated loss in the spindle assembly checkpoint protein Mad2 and phosphorylated Aurora C, which is involved in microtubule-kinetochore error correction. Their loss affects the fidelity of bivalent segregation but only when spindle organization is impaired during oocyte maturation. These findings have an impact clinically regarding the handling of human oocytes ex vivo during assisted reproductive techniques and suggest there is a genetic basis to aneuploidy susceptibility.

Original languageEnglish
Pages (from-to)1938-1947
Number of pages10
JournalCell Cycle
Volume13
Issue number12
DOIs
Publication statusPublished - 15 Jun 2014
Externally publishedYes

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M Phase Cell Cycle Checkpoints
Kinetochores
Aneuploidy
Oocytes
Mad2 Proteins
Mothers
Prophase
Assisted Reproductive Techniques
Proteins
Microtubules
Chromosomes

Cite this

Yun, Y., Holt, J. E., Lane, S. I. R., McLaughlin, E. A., Merriman, J. A., & Jones, K. T. (2014). Reduced ability to recover from spindle disruption and loss of kinetochore spindle assembly checkpoint proteins in oocytes from aged mice. Cell Cycle, 13(12), 1938-1947. https://doi.org/10.4161/cc.28897
Yun, Yan ; Holt, Janet E. ; Lane, Simon I.R. ; McLaughlin, Eileen A. ; Merriman, Julie A. ; Jones, Keith T. / Reduced ability to recover from spindle disruption and loss of kinetochore spindle assembly checkpoint proteins in oocytes from aged mice. In: Cell Cycle. 2014 ; Vol. 13, No. 12. pp. 1938-1947.
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Reduced ability to recover from spindle disruption and loss of kinetochore spindle assembly checkpoint proteins in oocytes from aged mice. / Yun, Yan; Holt, Janet E.; Lane, Simon I.R.; McLaughlin, Eileen A.; Merriman, Julie A.; Jones, Keith T.

In: Cell Cycle, Vol. 13, No. 12, 15.06.2014, p. 1938-1947.

Research output: Contribution to journalArticle

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