Age-related length variability of polymorphic CAG repeats.

ABSTRACT: Somatic instability of CAG repeats has been associated with the clinical progression of CAG repeat diseases. Aging and DNA repair processes influence the somatic stability of CAG repeat in disease and in mouse models. However, most of the studies have focused on genetically engineered transgenic repeats and little is known about the stability of naturally polymorphic CAG repeats. To study whether age and/or DNA repair activity have an effect on the somatic stability of CAG repeats, we analyzed variations of the length of naturally polymorphic CAG repeats in the striatum of young and aged WT and ogg1 KO mice. Some multiple and long polymorphic CAG repeats were observed to have variable length in the striatum of aged mice. Interestingly, a low level of repeat variability was detected in the

SUBMITTER: Sanchez-Contreras M 

PROVIDER: S-EPMC5218866 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature