Cited by 151Pancreatic and Hepatic Oncology ResearchCell death mechanisms and regulationSignaling Pathways in Disease

Mesothelin confers pancreatic cancer cell resistance to TNF-α-induced apoptosis through Akt/PI3K/NF-κB activation and IL-6/Mcl-1 overexpression

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Bharadwaj, Uddalak, Marin-Muller, Christian, Li, Min, Chen, Changyi, Yao, Qizhi·2011·Molecular Cancer

Abstract

Background: Previous studies showed that mesothelin (MSLN) plays important roles in survival of pancreatic cancer (PC) cells under anchorage dependent/independent conditions as well as resistance to chemotherapy. The recent success of intratumorally-injected adeno-encoded, chemo/radiation-inducible-promoter driven hTNF-α, (TNFerade) + gemcitabine in pre-clinical models of PC have renewed interest in use of TNF-α as a therapeutic component. To help find additional factors which might affect the therapy, we examined the resistance of MSLN-overexpressing pancreatic cancer cell lines to TNF-α-induced growth inhibition/apoptosis. Methods: Stable MSLN overexpressing MIA PaCa-2 cells (MIA-MSLN), stable MSLN-silenced AsPC-1 cells (AsPC-shMSLN) and other pancreatic cells (MIA-PaCa2, Panc 28, Capan-1, BxPC3, PL 45, Hs 766T, AsPC-1, Capan-2, Panc 48) were used. NF-κB activation was examined by western blots and luciferase reporter assay. TNF-α induced growth inhibition/apoptosis was measured by MTT, TUNEL assay and caspase activation. IL-6 was measured using luminex based assay. Results: Compared to low endogenous MSLN-expressing MIA PaCa-2 and Panc 28 cells, high endogenous MSLN-expressing Capan-1, BxPC3, PL 45, Hs 766T, AsPC-1, Capan-2, Panc 48 cells were resistant to TNF-α induced growth inhibition. Stable MSLN overexpressing MIA-PaCa2 cells (MIA-MSLN) were resistant to TNF-α-induced apoptosis while stable MSLN-silenced AsPC1 cells (AsPC-shMSLN) were sensitive. Interestingly, TNF-α-treated MIA-MSLN cells showed increased cell cycle progression and cyclin A induction, both of which were reversed by caspase inhibition. We further found that MIA-MSLN cells showed increased expression of anti-apoptotic Bcl-XL and Mcl-1; deactivated (p-Ser 75 ) BAD, and activated (p-Ser 70 ) Bcl-2. Constitutively activated NF-κB and Akt were evident in MIA-MSLN cells that could be suppressed by MSLN siRNA with a resultant increase in sensitivity of TNF-α induced apoptosis. Blocking NF-κB using IKK inhibitor wedelolactone also increased sensitivity to TNF-α-mediated cytotoxicity with concomitant decrease in Mcl-1. Blocking Akt using PI3K inhibitor also had a likewise effect presumably affecting cell cycle. MIA-MSLN cells produced increased IL-6 and were increased furthermore by TNF-α treatment. SiRNA-silencing of IL-6 increased TNF-α sensitivity of MIA-MSLN cells. Conclusions: Our study delineates a MSLN-Akt-NF-κB-IL-6-Mcl-1 survival axis that may be operative in PC cells, and might help cancer cells' survival in the highly inflammatory milieu evident in PC. Further, for the success of TNFerade + gemcitabine to be successful, we feel the simultaneous inhibition of components of this axis is also essential.

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  • MSLN confers pancreatic cancer cell resistance to TNFα-induced apoptosis through NF-κB activation and the enhanced expression of IL-6.

    “It confers pancreatic cancer cell resistance to TNFα-induced apoptosis through NF-κB activation and the enhanced expression of IL-6 (319).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [319]

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Authors
Bharadwaj, U., Marin-Muller, C., Li, M., Chen, C., & Yao, Q.
Affiliations
Baylor College of Medicine (US)
Corresponding author
Yao, Qizhi
Venue
Molecular Cancer
Published
2011-08-31
Volume
10
Issue
1
Pages
106-106
ISSN
1476-4598 (ISSN-L)
OpenAlex
W2102073127
Cited by
151
References
55
Citations by year
2026: 9 · 2025: 19 · 2024: 13 · 2023: 7 · 2022: 10 · 2021: 13 · 2020: 17 · 2019: 14 · 2018: 6 · 2017: 10 · 2016: 6 · 2015: 6 · 2014: 5 · 2013: 6 · 2012: 10
FWCI
3.31
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Cancer (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (CA140828, R21CA140828)
Topics
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
Keywords
mesothelin, pancreatic cancer, TNF-α, apoptosis resistance, interleukin-6, Mcl-1, Bcl-xL, Bad phosphorylation, cell cycle progression, cyclin A, caspase activation, gemcitabine, chemosensitization, tumor microenvironment
MeSH terms
Phosphoinositide-3 Kinase Inhibitors, Mesothelin, Antineoplastic Agents, Cell Survival, Chromones, Coumarins, Enzyme Activation, Humans, Morpholines, Pancreatic Neoplasms, Recombinant Proteins, Tumor Necrosis Factor-alpha, Interleukin-6, Gene Expression, S Phase, NF-kappa B, Apoptosis, Genes, Reporter, Drug Resistance, Neoplasm, Proto-Oncogene Proteins c-bcl-2, Phosphatidylinositol 3-Kinases, Cyclin A, Protein Transport, RNA Interference, Cell Line, Tumor, Luciferases, Renilla, Apoptosis Regulatory Proteins, Proto-Oncogene Proteins c-akt, I-kappa B Kinase, Caspase 3, Gene Knockdown Techniques, GPI-Linked Proteins, Myeloid Cell Leukemia Sequence 1 Protein

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