While studying the genetics of a different, roughly 6,000-member family in the Colombian province of Antioquia with a now well-documented history of early-onset Alzheimer's disease due to a mutation in the PSEN1 (presenilin) gene, the researchers came across this other, smaller family presenting the same symptoms.
Ngenkathi ufunda amagenethiki ahlukile, angacishe abe ngamalungu omndeni esifundazweni saseKholombiya angama-6,000 ase- Antioquia anomlando obhalwe ngemfanelo manje wokuqalisa kwesifo se- Alzheimer ngenxa yokuphenduka kwejini ye-PSEN1 (i-presenilin), abacwaningi bahlangabezana nalona omunye umndeni, omncane owawethula izimpawu ezifanayo.