CAG Repeat Lengths in X- and Y-bearing Sperm Indicate That Gender Bias during Transmission of Huntington's Disease Gene Is Determined in the Embryo

Irina V. Kovtun, Glenn Welch, H. David Guthrie, Kari L. Hafner, Cynthia T. McMurray

Research output: Contribution to journalArticle

23 Scopus citations


The size of the CAG tract at the Huntington's disease (HD) locus upon transmission depends on the gender of the parent. However, the basis for the parent-of-origin effect is unknown. To test whether expansion and contraction in HD are "imprinted" in the germ cells, we isolated the X- and Y-bearing sperm of HD transgenic mice. Here we show that CAG repeat distributions in the X- and Y-bearing spermatozoa of founding fathers do not differ. These data show that gender-dependent changes in CAG repeat length arise in the embryo.

Original languageEnglish (US)
Pages (from-to)9389-9391
Number of pages3
JournalJournal of Biological Chemistry
Issue number10
StatePublished - Mar 5 2004


ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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