Both common and rare polymorphisms within ABCA7 have been associated with Alzheimer's disease (AD). In particular, the rare AD associated polymorphism rs200538373 was associated with altered ABCA7 exon 41 splicing and an AD risk odds ratio of ∼1.9. To probe the role of this polymorphism in ABCA7 splicing, we used minigene studies and qPCR of human brain RNA. We report aberrant ABCA7 exon 41 splicing in the brain of a carrier of the rs200538373 minor C allele. Moreover, minigene studies show that rs200538373 acts as a robust functional variant in vitro. Lastly, although the ABCA7 isoform with an extended exon 41 is predicted to undergo nonsense mediated RNA decay, this was not supported by qPCR analyses, which showed relatively normal ABCA7 mRNA levels in the carrier of the rs200538373 minor C allele. In summary, rs200538373 is a functional polymorphism that alters ABCA7 exon 41 splicing without grossly altering the level of ABCA7 mRNA.
|Number of pages||9|
|Journal||Journal of Alzheimer's Disease|
|State||Published - 2017|
Bibliographical noteFunding Information:
The authors acknowledge the NIH (R01-AG045775) and the BrightFocus Foundation (A2014210S) for funding this work, as well as the University of Kentucky AD Center Neuropathology Core for tissue (P30-AG028383). The authors also acknowledge Elsevier Press for allowing data re-use to generate Fig. 3. The authors appreciate David Fardo, PhD, for statistical consulting.
© 2017-IOS Press and the authors. All rights reserved.
- Alzheimer's disease
ASJC Scopus subject areas
- Neuroscience (all)
- Clinical Psychology
- Geriatrics and Gerontology
- Psychiatry and Mental health