Evidence map›Paper›PMID 40892362›Full record

ArticleInternational journal of clinical oncology2025

Neutrophil-to-lymphocyte ratio affects the impact of proton pump inhibitors on efficacy of immune checkpoint inhibitors in patients with non‑small-cell lung cancer.

Tomoki Hori, Kazuhiro Yamamoto, Takefumi Ito, Shigeki Ikushima, Tomohiro Omura, Ikuko Yano

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Article in International journal of clinical oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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6 authors.

Tomoki HoriDepartment of Pharmacy, Nara Prefecture General Medical Center, 2-897-5 Shichijo-Nishimachi, Nara, 630-8581, Japan.
Kazuhiro YamamotoDepartment of Pharmacy, Kobe University Hospital, 7-5-2 Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan. yamakz@okayama-u.ac.jp.ORCID http://orcid.org/0000-0002-7513-6725
Takefumi ItoDepartment of Respiratory Medicine, Nara Prefecture General Medical Center, 2-897-5 Shichijo-Nishimachi, Nara, 630-8581, Japan.
Shigeki IkushimaDepartment of Pharmacy, Nara Prefecture General Medical Center, 2-897-5 Shichijo-Nishimachi, Nara, 630-8581, Japan.
Tomohiro OmuraDepartment of Pharmacy, Kobe University Hospital, 7-5-2 Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan.
Ikuko YanoDepartment of Pharmacy, Kobe University Hospital, 7-5-2 Kusunoki-Cho, Chuo-Ku, Kobe, 650-0017, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe neutrophil-to-lymphocyte ratio (NLR) at the initiation of immune checkpoint inhibitor (ICI) therapy is a known predictor of prognosis. Proton pump inhibitors (PPIs) reportedly attenuate the therapeutic efficacy of ICIs. However, the attenuation effects are not consistently observed across all patients. This study aimed to evaluate whether NLR serves as a stratification factor to determine the impact of PPI on the efficacy of ICI.

methodsThis retrospective study was conducted in patients with NSCLC treated with ICI monotherapy. Patients were stratified into two groups (higher NLR (≥ 4) and lower NLR (< 4)). PPI use was defined as the administration of PPIs within 30 days before or after ICI initiation. The primary outcome was progression-free survival (PFS) and the secondary outcome was overall survival (OS).

resultsAmong the 132 patients included, PPI users exhibited significantly shorter median PFS and OS than non-PPI users. In the higher NLR group (n = 61), PPI users had a markedly shorter PFS and OS than non-PPI users (median PFS: 1.6 vs. 8.2 months; p < 0.01, median OS: 3.3 vs. 19.6 months; p = 0.015). Conversely, in the lower NLR group (n = 71), no significant difference in PFS and OS was observed between PPI users and non-PPI users (median PFS: 2.8 vs. 7.3 months, p = 0.83, median OS: 17.6 vs. 24.4 months, p = 0.40).

conclusionNLR may be a significant stratification factor for evaluating the impact of PPI on PFS and OS in patients with NSCLC undergoing ICI monotherapy.

Indexed as

Carcinoma, Non-Small-Cell LungImmune Checkpoint InhibitorsLung NeoplasmsLymphocytesNeutrophilsProton Pump InhibitorsAdultAgedAged, 80 and overFemaleHumansMaleMiddle AgedPrognosisProgression-Free SurvivalRetrospective StudiesImmune Checkpoint InhibitorsProton Pump InhibitorsImmune checkpoint inhibitorNeutrophil-to-lymphocyte ratioNon-small-cell lung cancerProton pump inhibitor

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.