美国哥伦比亚大学Tal Danino团队提出益生菌引导的嵌合抗原受体(CAR)-T细胞靶向实体肿瘤。2023年10月13日出版的《科学》杂志发表了这项成果。
他们开发了一种益生菌引导的CAR-T细胞(ProCARs)平台,在该平台中,肿瘤定殖的益生菌释放合成靶标,标记肿瘤组织以进行CAR介导的原位溶解。该系统证明了CAR-T细胞活化和抗原不加区分的细胞溶解,在人类和小鼠癌症的多种异种移植和同基因模型中是安全有效的。他们进一步设计多功能益生菌,共同释放趋化因子,以增强CAR-T细胞募集和治疗反应。
研究人员表示,肿瘤抗原靶向疗法,如CAR-T细胞面临的一个主要挑战是识别在异质性固体肿瘤上具体和一致表达的适当靶点。与此相反,某些细菌种类能够有选择性地寄生在免疫特权的肿瘤核心区域,并且可以被设计成抗原无关的治疗递送平台。
《科学》:Volume 382 Issue 6667
附:英文原文
Title: Probiotic-guided CAR-T cells for solid tumor targeting
Author: Rosa L. Vincent, Candice R. Gurbatri, Fangda Li, Ana Vardoshvili, Courtney Coker, Jongwon Im, Edward R. Ballister, Mathieu Rouanne, Thomas Savage, Kenia de los Santos-Alexis, Andrew Redenti, Leonie Brockmann, Meghna Komaranchath, Nicholas Arpaia, Tal Danino
Issue&Volume: 2023-10-13
Abstract: A major challenge facing tumor-antigen targeting therapies such as chimeric antigen receptor (CAR)–T cells is the identification of suitable targets that are specifically and uniformly expressed on heterogeneous solid tumors. By contrast, certain species of bacteria selectively colonize immune-privileged tumor cores and can be engineered as antigen-independent platforms for therapeutic delivery. To bridge these approaches, we developed a platform of probiotic-guided CAR-T cells (ProCARs), in which tumor-colonizing probiotics release synthetic targets that label tumor tissue for CAR-mediated lysis in situ. This system demonstrated CAR-T cell activation and antigen-agnostic cell lysis that was safe and effective in multiple xenograft and syngeneic models of human and mouse cancers. We further engineered multifunctional probiotics that co-release chemokines to enhance CAR-T cell recruitment and therapeutic response.
来源:科学网
作者:小柯
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