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Neurology. 2016 Jun 7;86(23):2126-33. doi: 10.1212/WNL.0000000000002628. Epub 2016 Apr 1.

Phenotypic characteristics of Alzheimer patients carrying an ABCA7 mutation.

Author information

1
From the Neurodegenerative Brain Diseases Group (T.V.d.B., K.S., E.C., A.S., A.D.R., C.V.C., S.V., M.V.d.B., A.L., K.P., M.M., C.V.B.), Department of Molecular Genetics, VIB, Antwerp; Institute Born-Bunge (T.V.d.B., K.S., E.C., S.E., A.S., A.D.R., C.V.C., S.V., M.V.d.B., A.L., K.P., M.M., J.-J.M., P.P.D.D., P.C., C.V.B.), University of Antwerp; Department of Neurology (T.V.d.B., P.C.), Antwerp University Hospital, Edegem; Department of Neurology and Memory Clinic (T.V.d.B., S.E., P.P.D.D.), Hospital Netwerk Antwerp (ZNA), Middelheim and Hoge Beuken; Department of Neurology (A.S.), University Hospital Ghent and University of Ghent; Department of Neurosciences (M.V., R.V.), Faculty of Medicine, KU Leuven; Department of Old Age Psychiatry and Memory Clinic (M.V.) and Department of Neurology (R.V.), University Hospitals Leuven, Belgium; and Department of Neurology and Alzheimer Research Center (P.P.D.D.), University of Groningen and University Medical Center Groningen, the Netherlands.

Abstract

OBJECTIVE:

To generate a clinical and pathologic phenotype of patients carrying rare loss-of-function mutations in ABCA7, identified in a Belgian Alzheimer patient cohort and in an autosomal dominant family.

METHODS:

We performed a retrospective review of available data records, medical records, results of CSF analyses and neuroimaging studies, and neuropathology data.

RESULTS:

The mean onset age of the mutation carriers (n = 22) was 73.4 ± 8.4 years with a wide age range of 36 (54-90) years, which was independent of APOE genotype and cerebrovascular disease. The mean disease duration was 5.7 ± 3.0 years (range 2-12 years). A positive family history was recorded for 10 carriers (45.5%). All patient carriers except one presented with memory complaints. The 4 autopsied brains showed typical immunohistochemical changes of late-onset Alzheimer disease.

CONCLUSIONS:

All patients carrying a loss-of-function mutation in ABCA7 exhibited a classical Alzheimer disease phenotype, though with a striking wide onset age range, suggesting the influence of unknown modifying factors.

PMID:
27037232
PMCID:
PMC4917260
DOI:
10.1212/WNL.0000000000002628
[Indexed for MEDLINE]
Free PMC Article

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