Abstract | BACKGROUNDS: METHODS:
Tumor necrosis factor receptor 2 ( TNFR2) was analyzed via immunohistochemistry, immunofluorescence, western blotting, and ELISAs. The in vitro mechanism that TNFR2 regulates programmed cell death 1 ligand 1 (PD-L1) was investigated using immunofluorescence, immunohistochemistry, flow cytometry, western blotting, and chromatin immunoprecipitation (ChIP). In vivo efficacy and mechanistic studies, using C57BL/6 mice and nude mice with KPC cell-derived subcutaneous and orthotopic tumors, employed antibodies against TNFR2 and PD-L1. Survival curves were constructed for the orthotopic model and a genetically engineered PDAC model (LSL-KrasG12D/+; LSL-Trp53R172H/+; Pdx1-Cre). Mass cytometry, immunohistochemistry, and flow cytometry analyzed local and systemic alterations in the immunophenotype. RESULTS:
TNFR2 showed high expression and is a prognostic factor in CD8+ T cell-enriched pancreatic cancer. TNFR2 promotes tumorigenesis and progression of pancreatic cancer via dual effect: suppressing cancer immunogenicity and partially accelerating tumor growth. TNFR2 positivity correlated with PD-L1, and in vitro and in vivo, it could regulate the expression of PDL1 at the transcription level via the p65 NF-κB pathway. Combining anti-TNFR2 and PD-L1 antibodies eradicated tumors, prolonged overall survival in pancreatic cancer, and induced strong antitumor immune memory and secondary prevention by reducing the infiltration of Tregs and tumor-associated macrophages and inducing CD8+ T cell activation in the PDAC microenvironment. Finally, the antitumor immune response derived from combination therapy is mainly dependent on CD8+ T cells, partially dependent on CD4+ T cells, and independent of natural killer cells. CONCLUSIONS: Anti-TNFR2 and anti-PD-L1 combination therapy eradicated tumors by inhibiting their growth, relieving tumor immunosuppression, and generating robust memory recall.
|
Authors | Xiaozhen Zhang, Mengyi Lao, Jian Xu, Yi Duan, Hanshen Yang, Muchun Li, Honggang Ying, Lihong He, Kang Sun, Chengxiang Guo, Wen Chen, Haitao Jiang, Xiaoyu Zhang, Xueli Bai, Tingbo Liang |
Journal | Journal for immunotherapy of cancer
(J Immunother Cancer)
Vol. 10
Issue 3
(03 2022)
ISSN: 2051-1426 [Electronic] England |
PMID | 35260434
(Publication Type: Journal Article)
|
Copyright | © Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY. Published by BMJ. |
Chemical References |
- B7-H1 Antigen
- Programmed Cell Death 1 Receptor
- Receptors, Tumor Necrosis Factor, Type II
|
Topics |
- Animals
- B7-H1 Antigen
- Carcinoma, Pancreatic Ductal
(therapy)
- Humans
- Immunotherapy
- Mice
- Mice, Inbred C57BL
- Mice, Nude
- Pancreatic Neoplasms
- Programmed Cell Death 1 Receptor
- Receptors, Tumor Necrosis Factor, Type II
- Tumor Microenvironment
- Pancreatic Neoplasms
|