1. Peripheral eosinophil counts predict efficacy of anti-CD19 CAR-T cell therapy against B-lineage non-Hodgkin lymphoma
- Author
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Weidong Han, Shi Zixiao, Qingzhu Jia, Yajing Zhang, Peter B. Alexander, Pin Wang, Luxiang Xu, Yongsheng Wang, Bo Zhu, Qi-Jing Li, Jia-Nan Cheng, He Feng, Yarong Liu, Qichao Xie, Diyuan Qin, Lina Peng, Zhitao Ying, Jun Zhu, Hongliang Fang, Yuqin Song, Xuejiao Zuo, Jin Tao, and Chunyan Hu
- Subjects
0301 basic medicine ,Adult ,Male ,Lymphoma, B-Cell ,Cell ,Antigens, CD19 ,Medicine (miscellaneous) ,infiltration ,Immunotherapy, Adoptive ,Cell therapy ,Blood cell ,03 medical and health sciences ,Leukocyte Count ,Mice ,Young Adult ,0302 clinical medicine ,hemic and lymphatic diseases ,Cell Line, Tumor ,Medicine ,Animals ,Humans ,eosinophil ,Pharmacology, Toxicology and Pharmaceutics (miscellaneous) ,Aged ,Receptors, Chimeric Antigen ,business.industry ,Eosinophil ,Middle Aged ,medicine.disease ,Prognosis ,Chimeric antigen receptor ,Progression-Free Survival ,Lymphoma ,CAR-T ,Eosinophils ,Cytokine release syndrome ,Disease Models, Animal ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Immunology ,Biomarker (medicine) ,biomarker ,Female ,B-NHL ,business ,Research Paper - Abstract
Rationale: The onset of cytokine release syndrome (CRS) and in vivo persistence of anti-CD19 chimeric antigen receptor T (CAR-T) cells after infusion correlate with clinical responsiveness. However, there are no known baseline biomarkers that can predict the prognosis of patients with B-lineage non-Hodgkin lymphoma (B-NHL). The aim of this study was to identify blood cell populations associated with beneficial outcomes in B-NHL patients administered CAR-T cell immunotherapies. Methods: We enumerated peripheral blood and CAR-T cells by retrospectively analyzing three CAR-T cell trials involving 65 B-NHL patients. We used a preclinical model to elucidate the eosinophil mechanism in CAR-T cell therapy. Results: During an observation period up to 30 mo, B-NHL patients with higher baseline eosinophil counts had higher objective response rates than those with low eosinophil counts. Higher baseline eosinophil counts were also significantly associated with durable progression-free survival (PFS). The predictive significance of baseline eosinophil counts was validated in two independent cohorts. A preclinical model showed that eosinophil depletion impairs the intratumoral infiltration of transferred CAR-T cells and reduces CAR-T cell antitumor efficacy. Conclusion: The results of this study suggest that peripheral eosinophils could serve as stratification biomarkers and a recruitment machinery to facilitate anti-CD19 CAR-T cell therapy in B-NHL patients.
- Published
- 2021