[sup][5],[6] SCA1, SCA2, SCA3/MJD, SCA6, SCA7, SCA12, SCA17 and dentatorubral-pallidoluysian atrophy (DRPLA) share the most prevalent form of unstable CAG repeats.
The repeat-containing regions of the genes causing SCA1, SCA2, SCA3/MJD, SCA6, SCA7, SCA8, SCA12, SCA17 and DRPLA were amplified using appropriate primer pairs with polymerase chain reaction (PCR) [Table 1].
In our study, the genetic testing of Family J, which presented clinically diagnosed SCA, was not in agreement with the known subtypes of SCA1, SCA2, SCA3/MJD, SCA6, SCA7, SCA8, SCA12, SCA17 and DRPLA.