2. Academic Validation
  3. Inhibition of CDK1 Overcomes Oxaliplatin Resistance by Regulating ACSL4-mediated Ferroptosis in Colorectal Cancer

Inhibition of CDK1 Overcomes Oxaliplatin Resistance by Regulating ACSL4-mediated Ferroptosis in Colorectal Cancer

  • Adv Sci (Weinh). 2023 Sep;10(25):e2301088. doi: 10.1002/advs.202301088.
Kaixuan Zeng 1,  Weihao Li 2 3,  Yue Wang 4,  Zifei Zhang 5,  Linjie Zhang 2 3,  Weili Zhang 2 3,  Yue Xing 6 7,  Chi Zhou 2 3
Affiliations

Affiliations

  • 1 Precision Medical Research Institute, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China.
  • 2 Department of Colorectal Surgery, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
  • 3 State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
  • 4 Department of Gastroenterology, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, China.
  • 5 IIT Project Management Office, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, China.
  • 6 Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Medical Research Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
  • 7 Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
PMID: 37428466 DOI: 10.1002/advs.202301088
Abstract

Oxaliplatin is a widely used chemotherapy drug for patients with advanced colorectal Cancer (CRC); however, frequent drug resistance limits its therapeutic efficacy in patients. Here, this work identifies cyclin-dependent kinase 1 (CDK1) as a critical contributor to oxaliplatin resistance via in vitro and in vivo CRISPR/Cas9 screening. CDK1 is highly expressed in oxaliplatin-resistant cells and tissues due to the loss of N6-methyladenosine modification. Genetic and pharmacological blockade of CDK1 restore the susceptibility of CRC cells to oxaliplatin in vitro and in cell/patient-derived xenograft models. Mechanistically, CDK1 directly binds to and phosphorylates Acyl-CoA synthetase long-chain family 4 (ACSL4) at S447, followed by recruitment of E3 ubiquitin Ligase UBR5 and polyubiquitination of ACSL4 at K388, K498, and K690, which leads to ACSL4 protein degradation. Reduced ACSL4 subsequently blocks the biosynthesis of polyunsaturated fatty acid containing lipids, thereby inhibiting lipid peroxidation and Ferroptosis, a unique iron-dependent form of oxidative cell death. Moreover, treatment with a Ferroptosis inhibitor nullifies the enhancement of CRC cell sensitivity to oxaliplatin by CDK1 blockade in vitro and in vivo. Collectively, the findings indicate that CDK1 confers oxaliplatin resistance to cells by suppressing Ferroptosis. Therefore, administration of a CDK1 Inhibitor may be an attractive strategy to treat patients with oxaliplatin-resistant CRC.

Keywords

ACSL4; CDK1; colorectal cancer; ferroptosis; oxaliplatin resistance.

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