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Martinez, Pierre; Timmer, Margriet R; Lau, Chiu T; Calpe, Silvia; Sancho-Serra, Maria Del Carmen; Straub, Danielle; Baker, Ann-Marie; Meijer, Sybren L; Kate, Fiebo J W Ten; Mallant-Hent, Rosalie C; Naber, Anton H J; van Oijen, Arnoud H A M; Baak, Lubbertus C; Scholten, Pieter; Böhmer, Clarisse J M; Fockens, Paul; Bergman, Jacques J G H M; Maley, Carlo C; Graham, Trevor A; Krishnadath, Kausilia K
Nature communications, 08/2016, Letnik: 7, Številka: 1Journal Article
Surveillance of Barrett's oesophagus allows us to study the evolutionary dynamics of a human neoplasm over time. Here we use multicolour fluorescence in situ hybridization on brush cytology specimens, from two time points with a median interval of 37 months in 195 non-dysplastic Barrett's patients, and a third time point in a subset of 90 patients at a median interval of 36 months, to study clonal evolution at single-cell resolution. Baseline genetic diversity predicts progression and remains in a stable dynamic equilibrium over time. Clonal expansions are rare, being detected once every 36.8 patient years, and growing at an average rate of 1.58 cm(2) (95% CI: 0.09-4.06) per year, often involving the p16 locus. This suggests a lack of strong clonal selection in Barrett's and that the malignant potential of 'benign' Barrett's lesions is predetermined, with important implications for surveillance programs.
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in: SICRIS
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