Oncogenic mutant KRAS inhibition through oxidation at cysteine 118

Maximilian Kramer-Drauberg, Ettore Petrini, Alessia Mira, Enrico Patrucco, Rossella Scardaci, Ilenia Savinelli, Haiyun Wang, Keying Qiao, Giovanna Carrà, Marie Julie Nokin, Zhiwei Zhou, Kenneth D. Westover, David Santamaria, Paolo E. Porporato, Chiara Ambrogio

Research output: Contribution to journalArticlepeer-review

Abstract

Specific reactive oxygen species activate the GTPase Kirsten rat sarcoma virus (KRAS) by reacting with cysteine 118 (C118), leading to an electron transfer between C118 and nucleoside guanosine diphosphate (GDP), which causes the release of GDP. Here, we have mimicked permanent oxidation of human KRAS at C118 by replacing C118 with aspartic acid (C118D) in KRAS to show that oncogenic mutant KRAS is selectively inhibited via oxidation at C118, both in vitro and in vivo. Moreover, the combined treatment of hydrogen-peroxide-producing pro-oxidant paraquat and nitric-oxide-producing inhibitor N(ω)-nitro-l-arginine methyl ester selectively inhibits human mutant KRAS activity by inducing oxidization at C118. Our study shows for the first time the vulnerability of human mutant KRAS to oxidation, thereby paving the way to explore oxidation-based anti-KRAS treatments in humans.

Original languageEnglish (US)
Pages (from-to)311-328
Number of pages18
JournalMolecular oncology
Volume19
Issue number2
DOIs
StatePublished - Feb 2025

Keywords

  • KRAS C118
  • NSCLC
  • ROS
  • cysteine modification
  • oncogene
  • redox regulation

ASJC Scopus subject areas

  • Molecular Medicine
  • Oncology
  • Genetics
  • Cancer Research

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