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Screening for the C9ORF72 expansion in Greek Huntington Disease phenocopies and controls and meta-analysis of current data. | LitMetric

AI Article Synopsis

Article Abstract

Background: Several European studies examined the role of C9orf72 repeat expansion in patients with Huntington-disease like phenotypes (HD-L). The scope of our study is to investigate the expansion frequency in a Greek HD-L cohort and the meta-analysis of all published cases. This will be of use in genetic counseling of these cases.

Methods: A cohort of 74 patients with HD-L and 67 healthy controls were screened for the C9orf72 expansion status. Case-controls comparison was assessed with the Pearson's chi-square statistic for a 2 × 2 table.A systematic database search was conducted and seven studies, including the current study, were considered eligible for inclusion in a meta-analysis considering a total of 812 patients with HD phenocopies. Pooled mutation frequency was calculated using a Random Effects model or the Mantel-Haezsel fixed effects model, depending on the observed heterogeneity.

Results: In our cohort, one patient was found to have a pathologic expansion of C9orf72, and none from the control group (chi-square: 0.91, p-value: 0.34). Pooled mutation frequency was found at 2% (CI: 1-3%) with low heterogeneity (I:15%).

Discussion: Based on this meta-analysis the recommendation for genetic testing for C9orf72 expansions is further solidified.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7394208PMC
http://dx.doi.org/10.5334/tohm.61DOI Listing

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