Acar Cinleti, BurcuYardimci, NilgulAyturk, ZubeydeIlhan, AtillaKaya, GulhanAcar, MuradiyeKoc, Emine Rabia2025-10-242025-10-2420151300-01441303-6165https://doi.org/10.3906/sag-1407-19https://search.trdizin.gov.tr/tr/yayin/detay/180118https://hdl.handle.net/20.500.12899/3879Background/aim: Alzheimer disease (AD) is characterized by the accumulation of senile plaques composed of amyloid beta-peptide, which is derived from beta-amyloid precursor protein through degradation by beta-secretase and.-secretase complexes. One of the major components of gamma-secretase complex, anterior pharynx-defective-1 (APH-1), is responsible for the activity of the.-secretase complex. In this study, we searched for not only the most known common genetic risk factor, APOE, but also the APH-1a gene polymorphism in AD patients in a Turkish population. Materials and methods: In this study, 49 AD patients and 45 healthy controls were included. The genetic polymorphisms and allele frequencies of APOE and APH-1a were investigated. Patients were evaluated for behavioral, cognitive, and functional domains by detailed neurocognitive tests, and comparison between the above-mentioned polymorphisms and disease severity was made. Results: Although there was an increased tendency of the APO epsilon 4 allele in the AD group, no statistically significant difference was detected either in APOE or APH-1a polymorphisms, not suggesting a strong susceptibility to the development of AD. Conclusion: While searching for the pathogenesis of AD in order to develop novel diagnostic as well as therapeutic approaches, analysis of other genes with a possible role in AD is warranted.eninfo:eu-repo/semantics/openAccessAlzheimer disease; APOE; APH-1A; polymorphism; biomarkerArticle10.3906/sag-1407-1945510981105267383542-s2.0-84943242418Q1180118WOS:000362526300019Q4