PLCG1 is required for AML1-ETO leukemia stem cell self-renewal

Tina M Schnoeder, Adrian Schwarzer, Ashok Kumar Jayavelu, Chen-Jen Hsu, Joanna Kirkpatrick, Konstanze Döhner, Florian Perner, Theresa Eifert, Nicolas Huber, Patricia Arreba-Tutusaus, Anna Dolnik, Salam A Assi, Monica Nafria, Lu Jiang, Yu-Ting Dai, Zhu Chen, Sai-Juan Chen, Sophie G Kellaway, Anetta Ptasinska, Elizabeth S NgEdouard G Stanley, Andrew G Elefanty, Marcus Buschbeck, Holger Bierhoff, Steffen Brodt, Georg Matziolis, Klaus-Dieter Fischer, Andreas Hochhaus, Chun-Wei Chen, Olaf Heidenreich, Matthias Mann, Steven W Lane, Lars Bullinger, Alessandro Ori, Björn von Eyss, Constanze Bonifer, Florian Heidel

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Abstract

In an effort to identify novel drugs targeting fusion-oncogene induced acute myeloid leukemia (AML), we performed high-resolution proteomic analysis. In AML1-ETO (AE) driven AML we uncovered a de-regulation of phospholipase C (PLC) signaling. We identified PLCgamma 1 (PLCG1) as a specific target of the AE fusion protein which is induced after AE binding to intergenic regulatory DNA elements. Genetic inactivation of PLCG1 in murine and human AML inhibited AML1-ETO dependent self-renewal programs, leukemic proliferation, and leukemia maintenance in vivo. In contrast, PLCG1 was dispensable for normal hematopoietic stem- and progenitor cell function. These findings are extended to and confirmed by pharmacologic perturbation of Ca++-signaling in AML1-ETO AML cells, indicating that the PLCG1 pathway poses an important therapeutic target for AML1-ETO positive leukemic stem cells.

Original languageEnglish
JournalBlood
Early online date25 Oct 2021
DOIs
Publication statusE-pub ahead of print - 25 Oct 2021

Bibliographical note

Copyright © 2021 American Society of Hematology.

Keywords

  • Biochemistry
  • Cell Biology
  • Hematology
  • Immunology

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