ArticleTranslational lung cancer research2024
Phase Ib/II study of imprime PGG and pembrolizumab in patients with previously treated advanced non-small cell lung cancer (NSCLC): BTCRC LUN 15-017.
Article in Translational lung cancer research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03003468 (A Phase Ib/II Study of Anti-PD-1 Antibody Pembrolizumab and Imprime PGG for Patients With Metastatic Non-small Cell Lung Cancer After Progression on First-Line Therapy), which is not on this map. Cited by 2 papers.
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A Phase Ib/II Study of Anti-PD-1 Antibody Pembrolizumab and Imprime PGG for Patients With Metastatic Non-small Cell Lung Cancer After Progression on First-Line Therapy: Big Ten Cancer Research Consortium BTCRC-LUN15-017
Who cites it
2 citing papers in PubMed.
- Long-Term Survival Heterogeneity Across PD-L1-Defined Subgroups in Pembrolizumab-Treated Non-Small-Cell Lung Cancer: A Model-Based Analysis.Pharmaceutics · 2026Article
- 3D models for cancer-microbe interaction studiesFrontiers in immunology · 2026Article
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9 authors.
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Abstract
Background: Therapeutic strategies to engage anti-tumor innate immunity are still underdeveloped. Imprime PGG (imprime), a pathogen-associated molecular pattern (PAMP), through pattern recognition receptors, successfully illicit a broad-based innate immune response in preclinical models against various cancers. We aimed to study safety and efficacy of imprime in combination with pembrolizumab in advanced stage non-small cell lung cancer (NSCLC). Methods: We conducted an investigator-initiated, multi-institutional, single-arm, phase Ib/II trial in previously treated, advanced stage NSCLC patients. Primary endpoints were maximum-tolerated dose (MTD) of imprime for the phase Ib, and progression-free survival (PFS) for the phase II study (NCT03003468). Results: All 33 eligible patients were included in the safety analysis. No dose-limiting toxicity was observed and the imprime dose of 4 mg/kg was determined as the MTD. Thirty patients treated at the MTD (phase Ib, 6; phase II, 24) were included in the efficacy analysis. Median length of follow-up was 10.8 months. Confirmed objective response rate was 10% [95% confidence interval (CI): 2-27%], with one complete and two partial responses. Median PFS was 2.6 months (95% CI: 1.4-7.0), and 6- and 12-month PFS rates were 37% and 17%, respectively. Median overall survival (OS) was 11.1 months, and 6- and 12-month OS rates were 75% and 46%. Univariate analysis was performed to assess the impact of age, sex, race, disease-stage, programmed death-ligand 1 (PD-L1) expression levels, and prior immunotherapy on PFS and OS. Of these, prior immunotherapy negatively influenced OS [hazard ratio (HR): 2.95, 95% CI: 1.21-7.24]. Overall, the combination was safe and tolerable. Conclusions: The combination of imprime and pembrolizumab is tolerable but did not improve the outcome of advanced stage NSCLC patients who previously progressed on anti-programmed death 1 (PD-1)/PD-L1 immunotherapies. Further investigation is needed to understand the effects of therapeutic PAMPs to mount a strong innate immune response against cancer.
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