MAPT allele and haplotype frequencies in Nigerian Africans: Population distribution and association with Parkinson's disease risk and age at onset.
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Okunoye Olaitan, Ojo Oluwadamilola O, Abiodun Oladunni, Abubakar Sani, Achoru Charles, Adeniji Olaleye, Agabi Osigwe, Agulanna Uchechi, Akinyemi Rufus, Ali Mohammed, Ani-Osheku Ifeyinwa, Arigbodi Ohwotemu, Bello Abiodun, Erameh Cyril, Farombi Temitope, Fawale Michael, Imarhiagbe Frank, Iwuozo Emmanuel, Komolafe Morenikeji, Nwani Paul, Nwazor Ernest, Nyandaiti Yakub, Obiabo Yahaya, Odeniyi Olanike, Odiase Francis, Ojini Francis, Onwuegbuzie Gerald, Osaigbovo Godwin, Osemwegie Nosakhare, Oshinaike Olajumoke, Otubogun Folajimi, Oyakhire Shyngle, Ozomma Simon, Samuel Sarah, Taiwo Funmilola, Wahab Kolawole, Zubair Yusuf, Hernandez Dena, Bandres-Ciga Sara, Blauwendraat Cornelis, Singleton Andrew, Houlden Henry, Hardy John, Rizig Mie, Okubadejo Njideka
Аннотация
METHODS: The haplotype and genotype frequencies of MAPT rs1052553 were analysed in 907 individuals with PD and 1022 age-matched healthy controls from the Nigeria Parkinson's Disease Research network cohort. Clinical data related to PD included age at study, age at onset (AAO), and disease duration.
RESULTS: The frequency of the H1 haplotype was 98.7% in PD, and 99.1% in controls (p = 0.19). The H2 haplotype was present in - 1.3% of PD and 0.9% of controls (p = 0.24). The most frequent MAPT genotype was H1H1 (PD - 97.5%, controls - 98.2%). The H1 haplotype was not associated with PD risk after accounting for gender and AAO (Odds ratio for H1/H1 vs H1/H2 and H2/H2: 0.68 (95% CI:0.39-1.28); p = 0.23).
CONCLUSIONS: Our findings support previous studies that report a low frequency of the MAPT H2 haplotype in black ancestry Africans but document its occurrence in Nigerians. The MAPT H1 haplotype was not associated with an increased risk or age at onset of PD in this cohort.