Cited by 50Cancer, Hypoxia, and MetabolismColorectal Cancer Treatments and StudiesMetabolism, Diabetes, and Cancer

Knockdown of PKM2 and GLS1 expression can significantly reverse oxaliplatin-resistance in colorectal cancer cells

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Lu, Wei-Qun, Hu, Ying-Ying, Lin, Xiao-Ping, Fan, Wei·2017·Oncotarget

Abstract

// Wei-Qun Lu 1 , Ying-Ying Hu 1 , Xiao-Ping Lin 1 and Wei Fan 1 1 Department of Nuclear Medicine, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China Correspondence to: Wei Fan, email: jimfanwei@163.com , fanwei@sysucc.org.cn Keywords: colorectal cancer, pyruvate kinase M2 type (PKM2), kidney-type glutaminase (GLS1), knockdown, expression Received: February 07, 2017 Accepted: April 11, 2017 Published: April 24, 2017 ABSTRACT Clinical treatment for colorectal cancer (CRC) thus far encounters a huge challenge due to oxaliplatin-resistance. As crucial rate-limiting enzymes in aerobic glycolysis and glutaminolysis, pyruvate kinase M2 type (PKM2) and kidney-type glutaminase (GLS1) are proposed to carry important implications in colorectal carcinogenesis and drug-resistance. This study aimed to explore the possible association of oxaliplatin-resistance with aerobic glycolysis/glutaminolysis indexed by PKM2/GLS1 expression. PKM2 and GLS1 expression was quantified by polymerase chain reaction (PCR) and Western blot techniques in CRC cell lines. The abilities of cell formation, kinetics, migration, invasion, survival and apoptosis, as well as permeability glycoprotein (Pgp) expression were inspected before and after knocking-down PKM2/GLS1 expression. In addition, the influence of knocking-down PKM2/GLS1 expression was evaluated in vivo . Differentiated PKM2 and GLS1 expression in both THC8307 and THC8307/Oxa cell lines was identified. In the THC8307 cell line, PKM2 and GLS1 can accelerate malignant behaviors, increase oxaliplatin-resistance, upregulate Pgp expression, and inhibit cell apoptosis. Contrastingly in the THC8307/Oxa cell line, knockdown of PKM2/GLS1 expression can restrain malignant behaviors, reestablish oxaliplatin-sensitivity, downregulate Pgp expression, and induce cell apoptosis. In xenograft, knockdown of PKM2/GLS1 expression can significantly inhibit tumor growth, reduce Pgp expression, and increase tumor apoptosis. Taken together, the present findings enriched our knowledge by demonstrating a significant association of PKM2 and GLS1 with oxaliplatin-resistance in CRC. We further propose that knockdown of PKM2/GLS1 expression may constitute a novel therapeutic strategy toward effective treatment for CRC.

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  • Genetic knockdown of GLS1 in oxaliplatin-resistant colorectal cancer inhibits cell formation, wound healing, migration, and invasion, and significantly increases apoptosis in vitro.

    “In a study of oxaliplatin-resistant CRC, siRNA targeting GLS1 inhibited cell formation ability, wound healing ability, cell migration ability, and cell invasion ability and significantly increased apoptosis in vitro [27].”

    From Combined blockade of EGFR and glutamine metabolism in preclinical models of colorectal cancer (2020) · cites this paper as [27]

    The Results (Figure 5, Malignant behaviors of CRC cell lines) report lower cell-formation, migration, and invasion measures for GLS1-siRNA-treated oxaliplatin-resistant cells, and the Annexin V/PI assay (Figure 7) reports increased apoptosis. The paper specifically attributes the reported inhibition of wound healing to combined PKM2 and GLS1 knockdown, not GLS1 knockdown alone. Page numbers are unavailable in our copy. (LLM, conf=0.88)

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Authors
Lu, W.-Q., Hu, Y.-Y., Lin, X.-P., & Fan, W.
Affiliations
  • Sun Yat-sen University Cancer Center (CN)
  • Department of Nuclear Medicine, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, P.R. China
Corresponding author
Fan, Wei
Venue
Oncotarget
Published
2017-04-24
Volume
8
Issue
27
Pages
44171-44185
ISSN
1949-2553 (ISSN-L)
OpenAlex
W2608485495
Cited by
49
References
46
Citations by year
2026: 2 · 2025: 2 · 2024: 7 · 2023: 8 · 2022: 5 · 2021: 6 · 2020: 7 · 2019: 6 · 2018: 6
FWCI
1.75
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Oncotarget (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Health Medical Collaborative Innovation Program of Guangzhou (201400000001, No. 201400000001)
  • Guangzhou Municipal Science and Technology Project
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
PKM2, GLS1, oxaliplatin resistance, colorectal cancer, aerobic glycolysis, glutaminolysis, P-glycoprotein, apoptosis, tumor growth, xenografts, drug resistance reversal, gene knockdown, cell migration and invasion, tumor angiogenesis, tumor microenvironment, tumor-infiltrating immune cells
MeSH terms
Oxaliplatin, Thyroid Hormone-Binding Proteins, Animals, Antineoplastic Agents, Carrier Proteins, Cell Survival, Disease Models, Animal, Glutaminase, Humans, Immunohistochemistry, Membrane Proteins, Organoplatinum Compounds, Phenotype, Thyroid Hormones, Colorectal Neoplasms, Gene Expression, Gene Expression Regulation, Neoplastic, Drug Resistance, Neoplasm, ATP Binding Cassette Transporter, Subfamily B, Member 1, Xenograft Model Antitumor Assays, Cell Line, Tumor, Tumor Burden, Mice, Gene Knockdown Techniques

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