A novel PS1 gene mutation in a large Aboriginal kindred

Area of Science:

• Genetics
• Neuroscience
• Epidemiology

Background:

• Limited data exists on Alzheimer disease (AD) genetic epidemiology in North American Aboriginal populations.
• No prior documented cases of familial AD (FAD) have been reported in these communities.

Purpose of the Study:

• To investigate the genetic basis of early-onset familial Alzheimer disease (EOFAD) in a North American Aboriginal kindred.
• To identify specific genetic mutations contributing to FAD in this underrepresented population.

Main Methods:

• Genetic testing was performed on a large North American Aboriginal family exhibiting EOFAD.
• Analysis focused on identifying mutations within known Alzheimer disease-related genes.

Main Results:

• A novel mutation in the Presenilin 1 (PS1) gene, designated L250F, was identified.
• Affected individuals carrying the PS1 L250F mutation did not exhibit myoclonus or seizures, distinguishing them from previously reported PS1 codon 250 mutation families.

Conclusions:

• The discovery of a PS1 mutation in this kindred contributes to the understanding of FAD's genetic diversity.
• Implementing genetic findings in remote, culturally distinct communities poses unique challenges for knowledge transfer and care continuity.