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- Publisher Website: 10.1016/j.lungcan.2022.10.002
- Scopus: eid_2-s2.0-85140299601
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Article: IL-9 stimulates an anti-tumor immune response and facilitates immune checkpoint blockade in the CMT167 mouse model
Title | IL-9 stimulates an anti-tumor immune response and facilitates immune checkpoint blockade in the CMT167 mouse model |
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Authors | |
Keywords | Dendritic cells Immune checkpoint blockade Interleukin-9 MHC-I Non-small cell lung cancer |
Issue Date | 11-Oct-2022 |
Publisher | Elsevier |
Citation | Lung Cancer, 2022, v. 174, p. 14-26 How to Cite? |
Abstract | ObjectivesThere is mounting evidence that interleukin-9 (IL-9) is associated with various cancers although its function in lung cancer remains elusive. This study aimed to elucidate the role(s) of IL-9 in lung cancer and the mechanisms involved. Materials and methodsExpression of IL-9 receptor (IL-9R) in two murine lung cancer cell lines: CMT167 and Lewis lung carcinoma (LLC) were assessed and syngeneic murine lung cancer models were established. Tumor growth, intratumoral immune responses and downstream signaling pathways in tumor-bearing mice were analyzed upon IL-9 treatment. Human lung cancer cell lines A549 and H1975 were included for in vitro validation. Synergistic effects and immune responses of IL-9 in combination with anti-PD-1 were studied. ResultsIL-9R expression was only detected in CMT167 but not LLC cells. IL-9 suppressed CMT167 tumor growth and enhanced anti-tumor T cell responses, both of which were absent in IL-9R-deficient LLC model and lost upon IL-9R knockdown in CMT167 model. In CMT167 tumors, while IL-9 increased CD4+ and CD8+ T cells and dendritic cells, the cytotoxic T subset was the key driver of IL-9-induced tumor suppression. Consistently, in CMT167 and A549 cells, IL-9/IL-9R signaling promoted MHC class I upregulation. Inhibition of ERK signaling abolished IL-9-mediated MHC class I upregulation in CMT167 cells. IL-9 induced expression of PD-1 and PD-L1 on CD8+ T lymphocytes and CMT167 cells respectively. Combined IL-9 treatment with PD-1 blockade further upregulated tumor-infiltrating CD8+ T cell frequencies and synergistically suppressed tumor growth in CMT167 model. ConclusionIL-9 suppresses tumor growth by promoting tumor-derived MHC class I presentation and enhancing cytotoxic T cell immunity. Expression of IL-9R might be used as a biomarker for identification of potential target population susceptible to IL-9 treatment. Our study proposes IL-9 as a promising therapeutic immunomodulatory agent that can be used in combination with PD-1 blockade in lung cancer. |
Persistent Identifier | http://hdl.handle.net/10722/329054 |
ISSN | 2023 Impact Factor: 4.5 2023 SCImago Journal Rankings: 1.761 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Feng, Yuqian | - |
dc.contributor.author | Yan, Sheng | - |
dc.contributor.author | Lam, Sze Kwan | - |
dc.contributor.author | Ko, Frankie Chi Fat | - |
dc.contributor.author | Chen, Caoyang | - |
dc.contributor.author | Khan, Mahjabin | - |
dc.contributor.author | Ho, James Chung Man | - |
dc.date.accessioned | 2023-08-05T07:54:56Z | - |
dc.date.available | 2023-08-05T07:54:56Z | - |
dc.date.issued | 2022-10-11 | - |
dc.identifier.citation | Lung Cancer, 2022, v. 174, p. 14-26 | - |
dc.identifier.issn | 0169-5002 | - |
dc.identifier.uri | http://hdl.handle.net/10722/329054 | - |
dc.description.abstract | <h3>Objectives</h3><p>There is mounting evidence that interleukin-9 (IL-9) is associated with various cancers although its function in lung cancer remains elusive. This study aimed to elucidate the role(s) of IL-9 in lung cancer and the mechanisms involved.</p><h3>Materials and methods</h3><p>Expression of IL-9 receptor (IL-9R) in two murine lung cancer cell lines: CMT167 and Lewis lung carcinoma (LLC) were assessed and syngeneic murine lung cancer models were established. Tumor growth, intratumoral immune responses and downstream signaling pathways in tumor-bearing mice were analyzed upon IL-9 treatment. Human lung cancer cell lines A549 and H1975 were included for <em>in vitro</em> validation. Synergistic effects and immune responses of IL-9 in combination with anti-PD-1 were studied.</p><h3>Results</h3><p>IL-9R expression was only detected in CMT167 but not LLC cells. IL-9 suppressed CMT167 tumor growth and enhanced anti-tumor T cell responses, both of which were absent in IL-9R-deficient LLC model and lost upon IL-9R knockdown in CMT167 model. In CMT167 tumors, while IL-9 increased CD4<sup>+</sup> and CD8<sup>+</sup> T cells and dendritic cells, the cytotoxic T subset was the key driver of IL-9-induced tumor suppression. Consistently, in CMT167 and A549 cells, IL-9/IL-9R signaling promoted MHC class I upregulation. Inhibition of ERK signaling abolished IL-9-mediated MHC class I upregulation in CMT167 cells. IL-9 induced expression of PD-1 and PD-L1 on CD8<sup>+</sup> T lymphocytes and CMT167 cells respectively. Combined IL-9 treatment with PD-1 blockade further upregulated tumor-infiltrating CD8<sup>+</sup> T cell frequencies and synergistically suppressed tumor growth in CMT167 model.</p><h3>Conclusion</h3><p>IL-9 suppresses tumor growth by promoting tumor-derived MHC class I presentation and enhancing cytotoxic T cell immunity. Expression of IL-9R might be used as a biomarker for identification of potential target population susceptible to IL-9 treatment. Our study proposes IL-9 as a promising therapeutic immunomodulatory agent that can be used in combination with PD-1 blockade in lung cancer.</p> | - |
dc.language | eng | - |
dc.publisher | Elsevier | - |
dc.relation.ispartof | Lung Cancer | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Dendritic cells | - |
dc.subject | Immune checkpoint blockade | - |
dc.subject | Interleukin-9 | - |
dc.subject | MHC-I | - |
dc.subject | Non-small cell lung cancer | - |
dc.title | IL-9 stimulates an anti-tumor immune response and facilitates immune checkpoint blockade in the CMT167 mouse model | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.lungcan.2022.10.002 | - |
dc.identifier.scopus | eid_2-s2.0-85140299601 | - |
dc.identifier.volume | 174 | - |
dc.identifier.spage | 14 | - |
dc.identifier.epage | 26 | - |
dc.identifier.isi | WOS:000969689000001 | - |
dc.identifier.issnl | 0169-5002 | - |