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  • Title: Trisomy of chromosome 18 in the baboon (Papio hamadryas anubis).
    Author: Howell KH, Hubbard GB, Moore CM, Dunn BG, von Kap-Herr C, Raveendran M, Rogers JA, Leland MM, Brasky KM, Nathanielsz PW, Schlabritz-Loutsevitch NE.
    Journal: Cytogenet Genome Res; 2006; 112(1-2):76-81. PubMed ID: 16276093.
    Abstract:
    Trisomy 18 is usually a lethal chromosomal abnormality and is the second most common autosomal trisomy in humans, with an incidence of 1:8000 live births. It is commonly associated with abnormalities of the lower and upper extremities, having the frequency of 95% and 65%, respectively. A newborn female olive baboon (Papio hamadryas anubis) was diagnosed with intrauterine growth retardation and severe arthrogryposis-like congenital joint deformities. Cytogenetic analysis including G-banding and fluorescence in situ hybridization (FISH) revealed that the congenital abnormalities were associated with chromosomal mosaicism for trisomy 18. Genetic analysis with microsatellites from chromosome 18 confirmed the maternal origin of the extra chromosome 18. This is the first report of trisomy 18 in the baboon, which may be a promising animal model of human disease.
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