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Article: Isoflavonoid-based therapeutics to remodel immunologically cold tumors in nasopharyngeal carcinoma.
Title | Isoflavonoid-based therapeutics to remodel immunologically cold tumors in nasopharyngeal carcinoma. |
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Authors | |
Issue Date | 1-Jun-2022 |
Publisher | Lippincott, Williams & Wilkins |
Citation | Journal of Clinical Oncology, 2022, v. 40, n. Suppl 16 How to Cite? |
Abstract | Background: Nasopharyngeal carcinoma (NPC) is endemic in Southern China and is well-known to be heavily infiltrated by lymphocytes and constitute a unique but poorly defined tumor microenvironment. We aimed at delineating and defining the contribution of idronoxil (IDX), a synthetic flavonoid derivative, in restoring sensitivity to apoptosis and potentially modulating the immune microenvironment of NPC. Methods: Using multiplexed staining, we measured the levels of ENOX2 (IDX’s target), CD8 (cytotoxic T cell) and pan-cytokeratin (tumor marker) in 86 NPC patients’ cancerous specimens in tissue microarray format. NPC tissue bulk RNA-Seq and affymetrix microarray public datasets were gathered to examine ENOX2 significance. Interaction between ENOX2-expressing tumor cell lines (C17 and NPC43) and T cells were also studied. In vivo, antitumor effects of IDX on the growth of NPC43+ve tumors in nude mice and humanized mice were studied. Results: We performed median density as cut-off and tumors can be classified as hot or cold. 68.6% “cold”-phenotype tumors were observed in our cohort and the top 20% patients with highly positive ENOX2-expresing tumor cells showed lower number of CD8 infiltrates. Publicly dataset showed that highly expressed ENOX2 group associated with poorer prognosis (log-rank test p = 0.041). In vitro, we observed increased migration of T cells towards cancer cells when tumor cells were pre-treated with the combination of IDX and cisplatin (IDX+Cis) compared with monotherapy (IDX or cis alone) or untreated. We also observed increased susceptibility of tumor cells to T cell cytotoxicity when both IDX and Cis were added. In nude mice, IDX+Cis significantly decreased the tumor growth compared to saline-treated group. In humanized mice, upon treatment, we found 1.69-fold (p = 0.039) more CD3+ T cells in the tumor than in the blood when compared to control group. In humanized mice, the ratio between human T cell levels in tumor and blood was increased by the IDX+Cis compared to control group (1.67-fold, p = 0.01 by t-test). Conclusions: Distinct immunospatial profiles could be associated with clinicopathologic characteristics. The ability of IDX to modulate T cell populations indicates the potential of IDX to enhance the efficacy of current chemotherapy treatments in NPC by upregulating cellular trafficking toward tumor. |
Persistent Identifier | http://hdl.handle.net/10722/332015 |
ISSN | 2021 Impact Factor: 2.787 2020 SCImago Journal Rankings: 0.896 |
DC Field | Value | Language |
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dc.contributor.author | Kam, Ngar Woon | - |
dc.contributor.author | Laczka, Olivier | - |
dc.contributor.author | Hung, Desmond | - |
dc.contributor.author | Li, Xiang | - |
dc.contributor.author | Dai, Wei | - |
dc.contributor.author | Tsao, George | - |
dc.contributor.author | Lee, Victor Ho-Fun | - |
dc.contributor.author | Kwong, Dora Lai Wan | - |
dc.date.accessioned | 2023-09-28T05:00:16Z | - |
dc.date.available | 2023-09-28T05:00:16Z | - |
dc.date.issued | 2022-06-01 | - |
dc.identifier.citation | Journal of Clinical Oncology, 2022, v. 40, n. Suppl 16 | - |
dc.identifier.issn | 0277-3732 | - |
dc.identifier.uri | http://hdl.handle.net/10722/332015 | - |
dc.description.abstract | <p><strong>Background:</strong> Nasopharyngeal carcinoma (NPC) is endemic in Southern China and is well-known to be heavily infiltrated by lymphocytes and constitute a unique but poorly defined tumor microenvironment. We aimed at delineating and defining the contribution of idronoxil (IDX), a synthetic flavonoid derivative, in restoring sensitivity to apoptosis and potentially modulating the immune microenvironment of NPC. <strong>Methods:</strong> Using multiplexed staining, we measured the levels of ENOX2 (IDX’s target), CD8 (cytotoxic T cell) and pan-cytokeratin (tumor marker) in 86 NPC patients’ cancerous specimens in tissue microarray format. NPC tissue bulk RNA-Seq and affymetrix microarray public datasets were gathered to examine ENOX2 significance. Interaction between ENOX2-expressing tumor cell lines (C17 and NPC43) and T cells were also studied. <em>In vivo</em>, antitumor effects of IDX on the growth of NPC43+ve tumors in nude mice and humanized mice were studied. <strong>Results:</strong> We performed median density as cut-off and tumors can be classified as hot or cold. 68.6% “cold”-phenotype tumors were observed in our cohort and the top 20% patients with highly positive ENOX2-expresing tumor cells showed lower number of CD8 infiltrates. Publicly dataset showed that highly expressed ENOX2 group associated with poorer prognosis (log-rank test p = 0.041). <em>In vitro</em>, we observed increased migration of T cells towards cancer cells when tumor cells were pre-treated with the combination of IDX and cisplatin (IDX+Cis) compared with monotherapy (IDX or cis alone) or untreated. We also observed increased susceptibility of tumor cells to T cell cytotoxicity when both IDX and Cis were added. In nude mice, IDX+Cis significantly decreased the tumor growth compared to saline-treated group. In humanized mice, upon treatment, we found 1.69-fold (p = 0.039) more CD3+ T cells in the tumor than in the blood when compared to control group. In humanized mice, the ratio between human T cell levels in tumor and blood was increased by the IDX+Cis compared to control group (1.67-fold, p = 0.01 by t-test). <strong>Conclusions:</strong> Distinct immunospatial profiles could be associated with clinicopathologic characteristics. The ability of IDX to modulate T cell populations indicates the potential of IDX to enhance the efficacy of current chemotherapy treatments in NPC by upregulating cellular trafficking toward tumor.<br></p> | - |
dc.language | eng | - |
dc.publisher | Lippincott, Williams & Wilkins | - |
dc.relation.ispartof | Journal of Clinical Oncology | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Isoflavonoid-based therapeutics to remodel immunologically cold tumors in nasopharyngeal carcinoma. | - |
dc.type | Article | - |
dc.identifier.doi | 10.1200/JCO.2022.40.16_suppl.e14534 | - |
dc.identifier.volume | 40 | - |
dc.identifier.issue | Suppl 16 | - |
dc.identifier.eissn | 1537-453X | - |
dc.identifier.issnl | 0277-3732 | - |