Abstract
Introduction
TCR and BCR repertoire diversity plays a critical role in tumor immunity. Thus, analysis of TCR and BCR repertoires might help predict the clinical efficacy of anti-PD-1 treatment.
Methods
Blood samples from 30 patients with non-small cell lung cancer (NSCLC) treated with anti-PD-1 antibody were collected before and six weeks after treatment initiation. The clinical significance of TCR and BCR repertoire diversity in peripheral blood was evaluated in all the enrolled patients (n = 30) or in the subset with (n = 10) or without (n = 20) EGFR/ALK mutation.
Results
TCR and BCR diversity was significantly correlated at baseline (R = 0.65; P = 1.6 × 10–4) and on treatment (R = 0.72; P = 1.2 × 10–5). Compared to non-responders (SD or PD), responders (PR) showed significantly decreased TCR and BCR diversity after treatment in the EGFR/ALK wild-type subset (P = 0.0014 and P = 0.034, respectively), but not in all the enrolled patients. The post-treatment reduction in TCR and BCR repertoire diversity was also significantly associated with the occurrence of adverse events in the EGFR/ALK wild-type subset (P = 0.022 and P = 0.014, respectively). Patients with more reduced TCR diversity showed better progression-free survival (PFS) in the EGFR/ALK wild-type subset (P = 0.011) but not in the mutant subset.
Conclusions
These findings suggest the clinical significance of changes in peripheral TCR and BCR repertoire diversity after anti-PD-1 treatment in patients with NSCLC without EGFR/ALK mutation. Monitoring of the peripheral TCR and BCR repertoires may serve as a surrogate marker for the early detection of EGFR/ALK wild-type NSCLC patients who would benefit from anti-PD-1 treatment.
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Abbreviations
- AE:
-
Adverse event
- ALK:
-
Anaplastic lymphoma kinase
- BCR:
-
B cell receptor
- CT:
-
Computed tomography
- ICI:
-
Immune checkpoint inhibitor
- InvSimp index:
-
Inverse Simpson's index
- NSCLC:
-
Non-small cell lung cancer
- PBMCs:
-
Peripheral blood mononuclear cells
- PD:
-
Progressive disease
- PD-1:
-
Programmed cell death protein 1
- PFS:
-
Progression-free survival
- PR:
-
Partial response
- RG:
-
Repertoire Genesis
- SD:
-
Stable disease
- S–W index:
-
Shannon–Weaver index
- TLS:
-
Tertiary lymphoid structures
- TCR:
-
T cell receptor
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Acknowledgements
We would like to thank Junya Otake (Kanagawa Cancer Center Research Institute) for sample handling and data acquisition.
Funding
This study was supported by AMED under Grant Number JP20ae0101076 (TS, KA, HS, KY) and JSPS KAKENHI Grant Number JP18K19490 (TS).
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KA and TS designed the study. HS, KY, KA and TS obtained financial support for this study. YN, YI and HH contributed to data acquisition. NM, TH and KA collected patient samples and completed the follow-up. YN, TM, YI and KM conducted statistical analyses. YN, TM, YI, NM, HS, KY, KM, KA and TS analyzed and interpreted the data. YN, TM and TS wrote the manuscript, and NM and KA provided critical revisions of the manuscript. All authors approved the final version of the manuscript. YN, TM, YI and NM contributed equally as first authors.
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Conflicts of interest
TM is an employee of Repertoire Genesis, Inc. YN has received personal fees from MSD, Ono, Chugai, Eli Lilly, Bristol-Myers Squibb and Nippon Boehringer Ingelheim, and grants from Takeda, Bristol-Myers Squibb and Eli Lilly. HS has received personal fees from Ono, Nippon Boehringer Ingelheim and Novartis, and grants from Chugai, AstraZeneca and MSD. KY has received personal fees from Ono, Chugai and Bristol-Myers Squibb. KA has received grants and personal fees from AstraZeneca, MSD, Bristol Myers Squibb, Ono and Chugai. TS has received grants from BrightPath Biotherapeutics. The other authors have declared that no conflict of interest exists.
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The Institutional Review Board of Kurume University approved the study protocol (Approval number: Kurume University 15210). Written informed consent was received from all participants prior to inclusion in the study.
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The datasets used and analyzed during the current study are available on reasonable request.
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Nakahara, Y., Matsutani, T., Igarashi, Y. et al. Clinical significance of peripheral TCR and BCR repertoire diversity in EGFR/ALK wild-type NSCLC treated with anti-PD-1 antibody. Cancer Immunol Immunother 70, 2881–2892 (2021). https://doi.org/10.1007/s00262-021-02900-z
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DOI: https://doi.org/10.1007/s00262-021-02900-z