Epigenetic alteration contributes to the transcriptional reprogramming in T-cell prolymphocytic leukemia

Shulan Tian, Henan Zhang, Pan Zhang, Michael Kalmbach, Jeong Heon Lee, Tamas Ordog, Paul J. Hampel, Timothy G. Call, Thomas E. Witzig, Neil E. Kay, Eric W. Klee, Susan L. Slager, Huihuang Yan, Wei Ding

Research output: Contribution to journalArticlepeer-review


T cell prolymphocytic leukemia (T-PLL) is a rare disease with aggressive clinical course. Cytogenetic analysis, whole-exome and whole-genome sequencing have identified primary structural alterations in T-PLL, including inversion, translocation and copy number variation. Recurrent somatic mutations were also identified in genes encoding chromatin regulators and those in the JAK-STAT signaling pathway. Epigenetic alterations are the hallmark of many cancers. However, genome-wide epigenomic profiles have not been reported in T-PLL, limiting the mechanistic study of its carcinogenesis. We hypothesize epigenetic mechanisms also play a key role in T-PLL pathogenesis. To systematically test this hypothesis, we generated genome-wide maps of regulatory regions using H3K4me3 and H3K27ac ChIP-seq, as well as RNA-seq data in both T-PLL patients and healthy individuals. We found that genes down-regulated in T-PLL are mainly associated with defense response, immune system or adaptive immune response, while up-regulated genes are enriched in developmental process, as well as WNT signaling pathway with crucial roles in cell fate decision. In particular, our analysis revealed a global alteration of regulatory landscape in T-PLL, with differential peaks highly enriched for binding motifs of immune related transcription factors, supporting the epigenetic regulation of oncogenes and genes involved in DNA damage response and T-cell activation. Together, our work reveals a causal role of epigenetic dysregulation in T-PLL.

Original languageEnglish (US)
Article number8318
JournalScientific reports
Issue number1
StatePublished - Dec 2021

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Epigenetic alteration contributes to the transcriptional reprogramming in T-cell prolymphocytic leukemia'. Together they form a unique fingerprint.

Cite this