Locally Disordered Methylation Forms the Basis of Intratumor Methylome Variation in Chronic Lymphocytic Leukemia

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Locally Disordered Methylation Forms the Basis of Intratumor Methylome Variation in Chronic Lymphocytic Leukemia

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Title: Locally Disordered Methylation Forms the Basis of Intratumor Methylome Variation in Chronic Lymphocytic Leukemia
Author: Landau, Dan Avi; Clement, Kendell; Ziller, Michael Johannes; Boyle, Patrick; Fan, Jean; Gu, Hongcang; Stevenson, Kristen; Sougnez, Carrie; Wang, Lili; Li, Shuqiang; Kotliar, Dylan; Zhang, Wandi; Ghandi, Mahmoud; Garraway, Levi Alexander; Fernandes, Stacey M.; Livak, Kenneth J.; Gabriel, Stacey; Gnirke, Andreas; Lander, Eric Steven; Brown, Jennifer Ruth; Neuberg, Donna S.; Kharchenko, Peter Vasili; Hacohen, Nir; Getz, Gad A; Meissner, Alexander; Wu, Catherine J.

Note: Order does not necessarily reflect citation order of authors.

Citation: Landau, Dan A., Kendell Clement, Michael J. Ziller, Patrick Boyle, Jean Fan, Hongcang Gu, Kristen Stevenson, et al. 2014. “Locally Disordered Methylation Forms the Basis of Intratumor Methylome Variation in Chronic Lymphocytic Leukemia.” Cancer Cell 26 (6) (December): 813–825. doi:10.1016/j.ccell.2014.10.012.
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Abstract: Intratumoral heterogeneity plays a critical role in tumor evolution. To define the contribution of DNA methylation to heterogeneity within tumors, we performed genome-scale bisulfite sequencing of 104 primary chronic lymphocytic leukemias (CLLs). Compared with 26 normal B cell samples, CLLs consistently displayed higher intrasample variability of DNA methylation patterns across the genome, which appears to arise from stochastically disordered methylation in malignant cells. Transcriptome analysis of bulk and single CLL cells revealed that methylation disorder was linked to low-level expression. Disordered methylation was further associated with adverse clinical outcome. We therefore propose that disordered methylation plays a similar role to that of genetic instability, enhancing the ability of cancer cells to search for superior evolutionary trajectories.
Published Version: doi:10.1016/j.ccell.2014.10.012
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:33471096
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