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Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes
Published on: September 28, 2018
Comprehensive insights into the effects and regulatory mechanisms of immune cells expressing programmed
Min Liu1, Qian Sun1, Feng Wei1
1Department of Immunology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Key Laboratory of Cancer Immunology and Biotherapy, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China.
Abstract:
The programmed cell death-1 (PD-1)/programmed cell death ligand 1 (PD-L1) signaling pathway is an important mechanism in tumor immune escape, and expression of PD-L1 on tumor cells has been reported more frequently. However, accumulating evidence suggests that PD-1/PD-L1 is also widely expressed on immune cells, and that regulation is also critical for tumor immune responses. In this review, we emphasized that under solid tumor conditions, the immunoregulatory effects of immune cells expressing PD-1 or PD-L1, affected the prognoses of cancer patients. Therefore, a better understanding of the mechanisms that regulate PD-1 or PD-L1 expression on immune cells would provide clear insights into the increased efficacy of anti-PD antibodies and the development of novel tumor immunotherapy strategies.
Insights
The programmed cell death-1 (PD-1)/programmed cell death ligand 1 (PD-L1) pathway is crucial for tumor immune escape. Understanding PD-1/PD-L1 regulation on immune cells can enhance cancer immunotherapies.
Area of Science:
- Immunology
- Oncology
- Molecular Biology
Background:
- The programmed cell death-1 (PD-1)/programmed cell death ligand 1 (PD-L1) pathway is a key regulator of immune responses and a critical mechanism for tumor immune escape.
- While PD-L1 expression on tumor cells is frequently observed, accumulating evidence highlights the significant role of PD-1 and PD-L1 expression on immune cells in modulating anti-tumor immunity.
Purpose of the Study:
- To review and emphasize the immunoregulatory effects of PD-1 and PD-L1 expression on immune cells within the tumor microenvironment.
- To underscore the impact of these immune cell-mediated effects on cancer patient prognoses.
- To highlight the need for a deeper understanding of PD-1/PD-L1 regulation on immune cells for advancing cancer immunotherapy.
Main Methods:
- Literature review focusing on studies investigating the role of PD-1 and PD-L1 expression on immune cells in solid tumors.
- Analysis of the immunoregulatory functions mediated by PD-1/PD-L1 expressing immune cells.
- Synthesis of current knowledge on the prognostic implications of immune cell PD-1/PD-L1 expression in cancer patients.
Main Results:
- PD-1/PD-L1 pathway is significantly expressed on various immune cells within the solid tumor microenvironment, beyond tumor cells.
- The expression and regulation of PD-1/PD-L1 on immune cells critically influence the host's anti-tumor immune response and patient outcomes.
- Immune cell-mediated PD-1/PD-L1 signaling contributes to tumor immune evasion and affects cancer patient prognoses.
Conclusions:
- A comprehensive understanding of PD-1/PD-L1 regulation on immune cells is essential for optimizing current anti-PD antibody therapies.
- Targeting the PD-1/PD-L1 axis on immune cells presents a promising avenue for developing novel and more effective tumor immunotherapy strategies.
- Further research into the mechanisms governing PD-1/PD-L1 expression on immune cells will be pivotal for improving cancer treatment efficacy.
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