Cited by 34Colorectal Cancer Treatments and StudiesGenetic factors in colorectal cancerHER2/EGFR in Cancer Research

MLH1 Deficiency Induces Cetuximab Resistance in Colon Cancer via Her‐2/PI3K/AKT Signaling

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Han, Ying, Peng, Yinghui, Fu, Yaojie, Cai, Changjing, Guo, Cao, Liu, Shanshan, Li, Yiyi, Chen, Yihong +6 more·2020·Advanced Science

Abstract

The rapid onset of resistance to cetuximab (CTX) limits its clinical utility in colorectal cancer (CRC) patients. This study aims to understand a potential role of mismatch repair gene mutL homolog 1 (MLH1) in CTX response. Functional analysis of MLH1 in Her‐2/phosphoinositide 3‐kinases (PI3K)/PKB protein kinase (AKT)‐regulated CTX sensitivity is performed using human CRC specimens, CRC cell lines with different MLH1 expression levels, and a subcutaneous xenograft model. Overexpression, knockdown, small interfering RNA, and inhibitors are used to examine the role of MLH1 and HER‐2 downstream signaling and apoptotic targets in CTX sensitivity. Reduced MLH1 expression is correlated with unfavorable prognosis in cetuximab‐treated patients. MLH1 loss decreases CTX sensitivity through Her‐2/PI3K/AKT signaling and apoptosis resistance in culture and in xenografts, while MLH1 overexpression increases CTX sensitivity. Blocking Her‐2 signaling increases CTX sensitivity of microsatellite instability CRC in vitro and in vivo. MLH1 loss induces activation of Her‐2/PI3K/AKT signaling and leads to cetuximab resistance in colon cancer.

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  1. [20]D. Fink, S. Nebel, S. Aebi, H. Zheng, B. Cenni, A. Nehme, R. D. Christen, S. B. Howell, Cancer Res. 1996, 56, 4881. 8895738
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Authors
Han, Y., Peng, Y., Fu, Y., Cai, C., Guo, C., Liu, S., Li, Y., Chen, Y., Shen, E., Long, K., Wang, X., Yu, J., Shen, H., & Zeng, S.
Affiliations
  • Central South University (CN)
  • McMaster University (CA)
  • University of Pittsburgh (US)
Corresponding author
  • Yu, Jian
  • Shen, Hong
  • Zeng, Shan
Venue
Advanced Science
Publisher
Wiley
Published
2020-05-26
Volume
7
Issue
13
Pages
2000112-2000112
ISSN
2198-3844 (ISSN-L)
OpenAlex
W3028710404
Cited by
34
References
46
Citations by year
2025: 5 · 2024: 4 · 2023: 6 · 2022: 9 · 2021: 8 · 2020: 2
FWCI
2.26
Type
journal article
Language
en
Open access
Locations
  • Advanced Science (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Natural Science Foundation of China (81070362, 81172470, 81372629, 81772627, 81874073, 81974384)
Topics
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Genetic factors in colorectal cancer
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
Keywords
MLH1, cetuximab resistance, colon cancer, colorectal cancer, HER2, PI3K/Akt signaling, mismatch repair deficiency, microsatellite instability, apoptosis resistance, EGFR inhibitors, prognosis

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