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Dusatkova, Petra; Pfäffle, Roland; Brown, Milton R; Akulevich, Natallia; Arnhold, Ivo J P; Kalina, Maria A; Kot, Karolina; Krzisnik, Ciril; Lemos, Manuel C; Malikova, Jana; Navardauskaite, Ruta; Obermannova, Barbora; Pribilincova, Zuzana; Sallai, Agnes; Stipancic, Gordana; Verkauskiene, Rasa; Cinek, Ondrej; Blum, Werner F; Parks, John S; Austerlitz, Frederic; Lebl, Jan
European journal of human genetics, 03/2016, Letnik: 24, Številka: 3Journal Article
Two variants (c.301_302delAG;301_302delAG and c.150delA;150delA) in the PROP1 gene are the most common genetic causes of recessively inherited combined pituitary hormones deficiency (CPHD). Our objective was to analyze in detail the origin of the two most prevalent variants. In the multicentric study were included 237 patients with CPHD and their 15 relatives carrying c.301_302delAG;301_302delAG or c.150delA;150delA or c.301_302delAG; 150delA. They originated from 21 different countries worldwide. We genotyped 21 single-nucleotide variant markers flanking the 9.6-Mb region around the PROP1 gene that are not in mutual linkage disequilibrium in the general populations--a finding of a common haplotype would be indicative of ancestral origin of the variant. Haplotypes were reconstructed by Phase and Haploview software, and the variant age was estimated using an allelic association method. We demonstrated the ancestral origin of both variants--c.301_302delAG was carried on 0.2 Mb-long haplotype in a majority of European patients arising ~101 generations ago (confidence interval 90.1-116.4). Patients from the Iberian Peninsula displayed a different haplotype, which was estimated to have emerged 23.3 (20.1-29.1) generations ago. Subsequently, the data indicated that both the haplotypes were transmitted to Latin American patients ~13.8 (12.2-17.0) and 16.4 (14.4-20.1) generations ago, respectively. The c.150delA variant that was carried on a haplotype spanning about 0.3 Mb was estimated to appear 43.7 (38.4-52.7) generations ago. We present strong evidence that the most frequent variants in the PROP1 gene are not a consequence of variant hot spots as previously assumed, but are founder variants.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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