Clinical evaluation of IL13Ra2-targeted CAR T cell therapy in combination with nivolumab in patients with recurrent malignant glioma

IL13Ra2靶向CAR T细胞疗法联合纳武单抗治疗复发性恶性胶质瘤的临床评价

• 批准号: 10091312
• 负责人: CHRISTINE BROWN
• 金额: $ 66.58万
• 依托单位: BECKMAN RESEARCH INSTITUTE/CITY OF HOPE
• 依托单位国家: 美国
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10091312
• 关键词: Address; Advanced Malignant Neoplasm; Animals; Antigen Targeting; Antigens; Biology; CAR T cell therapy; CXCL10 gene; Cells; Cerebrospinal Fluid; Characteristics; Cities; Clinical; Clinical Trials; Combined Modality Therapy; Disease; Effectiveness; Environment; Generations; Glioblastoma; Glioma; Goals; Hematologic Neoplasms; Immune; Immunocompetent; Immunologics; Immunophenotyping; Immunosuppression; Immunotherapy; In complete remission; Interleukin-13; Intraventricular; Lead; Letters; Malignant Glioma; Mediating; Modeling; Molecular; Mus; Neoplasm Metastasis; Nivolumab; PD-1 blockade; PD-1/PD-L1; PDL1 pathway; Pathway interactions; Patient-Focused Outcomes; Patients; Phase; Phase I Clinical Trials; Phenotype; Population; Positioning Attribute; Recurrence; Resistance; Role; Safety; Sampling; Solid Neoplasm; T cell response; T cell therapy; T-Lymphocyte; T-Lymphocyte Subsets; T-cell inflamed; Therapeutic; TimeLine; Translating; Treatment Efficacy; Vertebral column; anti-PD-1; anti-PD1 antibodies; anti-PD1 therapy; anti-cancer; anti-tumor immune response; base; cancer therapy; chimeric antigen receptor; chimeric antigen receptor T cells; clinical candidate; cohort; design; experience; experimental study; immune checkpoint blockade; improved; improved outcome; innovation; insight; mouse model; phase I trial; pre-clinical; preclinical study; programmed cell death ligand 1; programmed cell death protein 1; programs; receptor; recruit; research clinical testing; response; safety and feasibility; standard of care; success; therapeutic development; therapy resistant; tumor; tumor microenvironment

PROJECT SUMMARY Chimeric antigen receptor (CAR) T cell therapy is emerging as a powerful anti-cancer strategy that may offer new opportunities to improve outcomes for patients with malignant gliomas (MG). Although CAR T cells have demonstrated remarkable clinical responses against hematologic malignancies, success against solid tumors remains an important therapeutic goal. The immunosuppressive solid tumor microenvironment (TME) presents obstacles to therapy that must be overcome in order to achieve therapeutic efficacy. City of Hope was the first to clinically translate CAR T cells for the treatment of MG, and the lead CAR program targets the glioma- associated antigen IL13 receptor alpha 2 (IL13Rα2). Initial findings have demonstrated that the treatment is well tolerated and shows evidence of antitumor activity. One patient with recurrent multifocal glioblastoma (including metastatic lesions in the spine) with characteristics of an inflamed TME, achieved a complete response (CR) that was durable for more than 7 months. Importantly, this case provides evidence that CAR T cells can mediate profound antitumor activity against one of the most lethal and difficult-to-treat solid tumors, and also provides critical information on how the tumor landscape can modulate response to CAR T cell immunotherapy. Our goal is to implement strategies to overcome the underlying causes of immunosuppression within the tumor microenvironment that limit CAR T cell responses to MG. The PD-1/PD-L1 pathway has emerged as a critical driver of immune suppression in solid tumors, including MG. We hypothesize that checkpoint blockade will synergize with CAR T cells to create a tumor landscape more favorable to immunotherapy. We propose to clinically evaluate IL13Rα2-CAR T cell therapy in combination with anti-PD1 (nivolumab) in patients with IL13Rα2+ recurrent MG (Specific Aim 1). Interrogating correlative samples from this clinical trial, we will assess tumor and TME changes that occur post T cell therapy with and without nivolumab, as well as molecular pathways that dominantly correlate with response and/or resistance to therapy (Specific Aim 2). In addition, we will preclinically evaluate in immunocompetent mice, the impact of an inflamed versus non-inflamed TME on the efficacy of the combination therapy. These preclinical studies will aid in elucidating mechanisms of response and resistance in the two immunological landscapes (Specific Aim 3). This project builds upon our prior preclinical and clinical experience with IL13Rα2-CAR T cell therapy, as well as our understanding of PD-1/PDL-1 biology and its impact on immunotherapy. We anticipate these experiments will provide insights for improved MG therapies, which also may apply to other advanced cancers.

项目总结