A pathogenic PSEN1 Trp165Cys mutation associated with early-onset Alzheimer's disease

BMC Neurology
Vo Van GiauSang Yun Kim

Abstract

Presenilin-1 (PSEN1) is one of the causative genes for early onset Alzheimer's disease (EOAD). Recently, emerging studies reported several novel PSEN1 mutations among Asian. We describe a male with EOAD had a pathogenic PSEN1 mutation. A 53-year-old male presented with memory decline, followed by difficulty in finding ways. Patient had positive family history, since his mother and one of his brother was also affected with dementia. Brain magnetic resonance imaging (MRI) scan showed mild degree of atrophy of bilateral hippocampus and parietal lobe. 18F-Florbetaben-PET (FBB-PET) revealed increased amyloid deposition in bilateral frontal, parietal, temporal lobe and precuneus. Whole exome analysis revealed a heterozygous, probably pathogenic PSEN1 (c.695G > T, p.W165C) mutation. Interestingly, Trp165Cys mutation is located in trans membrane (TM)-III region, which is conserved between PSEN1/PSEN2. In vitro studies revealed that PSEN1 Trp165Cys could result in disturbances in amyloid metabolism. This prediction was confirmed by structure predictions and previous in vitro studies that the p.Trp165Cys could result in decreased Aβ42/Aβ40 ratios. We report a case of EOAD having a pathogenic PSEN1 (Trp165Cys) confirmed with in silico and...Continue Reading

References

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Citations

Aug 28, 2019·International Journal of Molecular Sciences·Vo Van GiauSeong Soo A An
Sep 29, 2019·International Journal of Molecular Sciences·Vo Van GiauSangYun Kim
Mar 25, 2020·International Journal of Molecular Sciences·Wioletta Rozpędek-KamińskaIreneusz Majsterek

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Methods Mentioned

BETA
exome sequencing
Cyclic sequencing

Software Mentioned

Raptor X
ExPasy
Discovery Studio

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