|Title||The DNA-helicase HELLS drives ALK ALCL proliferation by the transcriptional control of a cytokinesis-related program.|
|Publication Type||Journal Article|
|Year of Publication||2021|
|Authors||Tameni A, Sauta E, Mularoni V, Torricelli F, Manzotti G, Inghirami G, Bellazzi R, Fragliasso V, Ciarrocchi A|
|Journal||Cell Death Dis|
|Date Published||2021 01 27|
|Keywords||Cell Line, Tumor, Cell Proliferation, Cytokinesis, DNA Helicases, Humans, Lymphoma, Large-Cell, Anaplastic, Transcriptional Activation, Transfection|
Deregulation of chromatin modifiers, including DNA helicases, is emerging as one of the mechanisms underlying the transformation of anaplastic lymphoma kinase negative (ALK) anaplastic large cell lymphoma (ALCL). We recently identified the DNA-helicase HELLS as central for proficient ALKALCL proliferation and progression. Here we assessed in detail its function by performing RNA-sequencing profiling coupled with bioinformatic prediction to identify HELLS targets and transcriptional cooperators. We demonstrated that HELLS, together with the transcription factor YY1, contributes to an appropriate cytokinesis via the transcriptional regulation of genes involved in cleavage furrow regulation. Binding target promoters, HELLS primes YY1 recruitment and transcriptional activation of cytoskeleton genes including the small GTPases RhoA and RhoU and their effector kinase Pak2. Single or multiple knockdowns of these genes reveal that RhoA and RhoU mediate HELLS effects on cell proliferation and cell division of ALKALCLs. Collectively, our work demonstrates the transcriptional role of HELLS in orchestrating a complex transcriptional program sustaining neoplastic features of ALKALCL.
|Alternate Journal||Cell Death Dis|
|PubMed Central ID||PMC7840974|
|Grant List||P01 CA229100 / CA / NCI NIH HHS / United States|
Giorgio Inghirami, M.D.