. Novel presenilin mutations within Moroccan patients with Early-Onset Alzheimer's Disease. Neuroscience. 2014 Jun 6;269:215-22. Epub 2014 Apr 4 PubMed.

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  1. I must admit to being somewhat skeptical about the results presented in this paper and in a sister paper on novel mutations in APP. It seems remarkable (and highly improbable) that the researchers would discover numerous novel frameshift familial AD (FAD) mutations truncating the open reading frames of PSEN1 and PSEN2 among a small number of families when the only such mutation that I know of previously published is K115Efx10 in PSEN2 (Jayadev et al., 2010) among the 180-plus FAD mutations known in these two genes (the rest of which preserve the genes' open reading frames). The sequence data presented is not especially convincing.

    References:

    . Alzheimer's disease phenotypes and genotypes associated with mutations in presenilin 2. Brain. 2010 Apr;133(Pt 4):1143-54. PubMed.