Validation of an LC-MS based approach for profiling histones in chronic lymphocytic leukemia

Xiaodan Su, David M. Lucas, Liwen Zhang, Hua Xu, Vlad Zabrouskov, Melanie E. Davis, Amy R. Knapp, Donn C. Young, Philip R.O. Payne, Mark R. Parthun, Guido Marcucci, Michael R. Grever, John C. Byrd, Michael A. Freitas

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The in vitro evaluation of histones and their PTMs has drawn substantial interest in the development of epigenetic therapies. The differential expression of histone isoforms may serve as a potential marker in the classification of diseases affected by chromatin abnormalities. In this study, protein profiling by LC and MS was used to explore differences in histone composition in primary chronic lymphocytic leukemia (CLL) cells. Extensive method validations were performed to determine the experimental variances that would impact histone relative abundance. The resulting data demonstrated that the proposed methodology was suitable for the analysis of histone profiles. In 4 normal individuals and 40 CLL patients, a significant decrease in the relative abundance of histone H2A variants (H2AFL and H2AFA/M*) was observed in primary CLL cells as compared to normal B cells. Protein identities were determined using high mass accuracy MS and shotgun proteomics.

Original languageEnglish
Pages (from-to)1197-1206
Number of pages10
Issue number5
StatePublished - Mar 2009


  • Chronic lymphocytic leukemia
  • Histone
  • Variant


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