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Neoadjuvant therapy with immune checkpoint inhibitors in operable nonsmall cell lung cancer.
Current Opinion in Oncology 2023 October 24
PURPOSE OF REVIEW: In localized nonsmall cell lung cancer (NSCLC) systemic recurrences after surgery are common. Therefore, adjuvant or neoadjuvant chemotherapy is used. With the advent of immune checkpoint inhibitors (ICIs) in metastatic disease the question is whether ICIs can further improve the outcome.
RECENT FINDINGS: In several phase I/II trials, major pathological response (MPR) rates with several ICIs between 7% and 50% were seen. No major additional side effects occurred. In combination with chemotherapy CheckMate-816 randomized additional neoadjuvant nivolumab and achieved a high pathological complete response (pCR) rate and a better event-free survival (EFS) - without negatively influencing surgery. More randomized trials are performed with neoadjuvant immunochemotherapy and adjuvant treatment after surgery. In Keynote-671, pembrolizumab is used pre and postoperatively with a significantly higher EFS rate at 2 years (62.4% vs. 40.6%). Similar preliminary results are reported in the AEGEAN (durvalumab) and Neotorch (toripalimab) trials. Higher tumour stage and MPR, partly programmed cell death 1 ligand 1 (PD-L1) expression, tumour mutational burden (TMB) and circulating tumour DNA (ctDNA) are correlated with efficacy.
SUMMARY: Neoadjuvant immunochemotherapy improves MPR and EFS rates, especially in more advanced tumours and tumours expressing PD-L1 - without relevantly increasing toxicities. But further and longer evaluation is needed.
RECENT FINDINGS: In several phase I/II trials, major pathological response (MPR) rates with several ICIs between 7% and 50% were seen. No major additional side effects occurred. In combination with chemotherapy CheckMate-816 randomized additional neoadjuvant nivolumab and achieved a high pathological complete response (pCR) rate and a better event-free survival (EFS) - without negatively influencing surgery. More randomized trials are performed with neoadjuvant immunochemotherapy and adjuvant treatment after surgery. In Keynote-671, pembrolizumab is used pre and postoperatively with a significantly higher EFS rate at 2 years (62.4% vs. 40.6%). Similar preliminary results are reported in the AEGEAN (durvalumab) and Neotorch (toripalimab) trials. Higher tumour stage and MPR, partly programmed cell death 1 ligand 1 (PD-L1) expression, tumour mutational burden (TMB) and circulating tumour DNA (ctDNA) are correlated with efficacy.
SUMMARY: Neoadjuvant immunochemotherapy improves MPR and EFS rates, especially in more advanced tumours and tumours expressing PD-L1 - without relevantly increasing toxicities. But further and longer evaluation is needed.
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