Signal Transduction and Targeted Therapy (Feb 2022)

Activation of RAS/MAPK pathway confers MCL-1 mediated acquired resistance to BCL-2 inhibitor venetoclax in acute myeloid leukemia

  • Qi Zhang,
  • Bridget Riley-Gillis,
  • Lina Han,
  • Yanan Jia,
  • Alessia Lodi,
  • Haijiao Zhang,
  • Saravanan Ganesan,
  • Rongqing Pan,
  • Sergej N. Konoplev,
  • Shannon R. Sweeney,
  • Jeremy A. Ryan,
  • Yulia Jitkova,
  • Kenneth Dunner,
  • Shaun E. Grosskurth,
  • Priyanka Vijay,
  • Sujana Ghosh,
  • Charles Lu,
  • Wencai Ma,
  • Stephen Kurtz,
  • Vivian R. Ruvolo,
  • Helen Ma,
  • Connie C. Weng,
  • Cassandra L. Ramage,
  • Natalia Baran,
  • Ce Shi,
  • Tianyu Cai,
  • Richard Eric Davis,
  • Venkata L. Battula,
  • Yingchang Mi,
  • Jing Wang,
  • Courtney D. DiNardo,
  • Michael Andreeff,
  • Jeffery W. Tyner,
  • Aaron Schimmer,
  • Anthony Letai,
  • Rose Ann Padua,
  • Carlos E. Bueso-Ramos,
  • Stefano Tiziani,
  • Joel Leverson,
  • Relja Popovic,
  • Marina Konopleva

DOI
https://doi.org/10.1038/s41392-021-00870-3
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 13

Abstract

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Abstract Despite high initial response rates, acute myeloid leukemia (AML) treated with the BCL-2–selective inhibitor venetoclax (VEN) alone or in combinations commonly acquires resistance. We performed gene/protein expression, metabolomic and methylation analyses of isogenic AML cell lines sensitive or resistant to VEN, and identified the activation of RAS/MAPK pathway, leading to increased stability and higher levels of MCL-1 protein, as a major acquired mechanism of VEN resistance. MCL-1 sustained survival and maintained mitochondrial respiration in VEN-RE cells, which had impaired electron transport chain (ETC) complex II activity, and MCL-1 silencing or pharmacologic inhibition restored VEN sensitivity. In support of the importance of RAS/MAPK activation, we found by single-cell DNA sequencing rapid clonal selection of RAS-mutated clones in AML patients treated with VEN-containing regimens. In summary, these findings establish RAS/MAPK/MCL-1 and mitochondrial fitness as key survival mechanisms of VEN-RE AML and provide the rationale for combinatorial strategies effectively targeting these pathways.