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Current Immunotherapeutic Strategies Targeting the PD-1/PD-L1 Axis in Non-Small Cell Lung Cancer with Oncogenic
Ichidai Tanaka1, Masahiro Morise1
1Department of Respiratory Medicine, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan.
Abstract:
Treatment strategies targeting programed cell death 1 (PD-1) or its ligand, PD-L1, have been developed as immunotherapy against tumor progression for various cancer types including non-small cell lung cancer (NSCLC). The recent pivotal clinical trials of immune-checkpoint inhibiters (ICIs) combined with cytotoxic chemotherapy have reshaped therapeutic strategies and established various first-line standard treatments. The therapeutic effects of ICIs in these clinical trials were analyzed according to PD-L1 tumor proportion scores or tumor mutational burden; however, these indicators are insufficient to predict the clinical outcome. Consequently, molecular biological approaches, including multi-omics analyses, have addressed other mechanisms of cancer immune escape and have revealed an association of NSCLC containing specific driver mutations with distinct immune phenotypes. NSCLC has been characterized by driver mutation-defined molecular subsets and the effect of driver mutations on the regulatory mechanism of PD-L1 expression on the tumor itself. In this review, we summarize the results of recent clinical trials of ICIs in advanced NSCLC and the association between driver alterations and distinct immune phenotypes. We further discuss the current clinical issues with a future perspective for the role of precision medicine in NSCLC.
Insights
Immune checkpoint inhibitors (ICIs) show promise in treating non-small cell lung cancer (NSCLC). Driver mutations in NSCLC are linked to specific immune phenotypes, impacting treatment outcomes.
Area of Science:
- Oncology
- Immunology
- Genetics
Background:
- Immune checkpoint inhibitors (ICIs) targeting programed cell death 1 (PD-1) or PD-L1 are key immunotherapies for cancers like non-small cell lung cancer (NSCLC).
- Recent clinical trials combining ICIs with chemotherapy have established new first-line treatments for advanced NSCLC.
- Current predictive markers like PD-L1 scores and tumor mutational burden are insufficient for determining ICI efficacy.
Purpose of the Study:
- To review recent clinical trials of ICIs in advanced NSCLC.
- To explore the association between driver alterations in NSCLC and distinct immune phenotypes.
- To discuss current clinical challenges and future directions for precision medicine in NSCLC.
Main Methods:
- Review of pivotal clinical trials involving ICIs in advanced NSCLC.
- Analysis of molecular biological approaches, including multi-omics, to understand cancer immune escape.
- Examination of the relationship between driver mutations and immune phenotypes in NSCLC.
Main Results:
- Specific driver mutations in NSCLC are associated with distinct immune phenotypes.
- Driver mutations influence the regulatory mechanisms of PD-L1 expression.
- Multi-omics analyses are revealing new mechanisms of cancer immune escape.
Conclusions:
- Understanding the interplay between driver mutations and immune phenotypes is crucial for optimizing ICI therapy in NSCLC.
- Precision medicine approaches are essential for tailoring NSCLC treatment based on molecular profiles.
- Further research is needed to overcome current clinical limitations and improve patient outcomes.
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