Zhang Qing, Wang Haiyu, Li Huizhong, Xu Jinjing, Tian Kang, Yang Jie, Lu Zheng, Zheng Junnian
Cancer Institute, Xuzhou Medical University, Xuzhou, Jiangsu, 221002, China.
Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical College, Xuzhou, Jiangsu, 221002, China.
Oncotarget. 2017 Feb 7;8(6):9488-9499. doi: 10.18632/oncotarget.14367.
Chimeric antigen receptor (CAR)-modified T cell (CAR T) is a promising therapeutic option for patients with cancer. Such an approach requires the identification of tumor-specific antigen targets that are expressed in solid tumors. We developed a new third-generation CAR directed against tissue factor (TF), a surface molecule overexpressed in some types of lung cancer, melanoma and other cancers. First, we demonstrated by immunohistochemistry that TF was overexpressed in squamous cell carcinoma and adenocarcinoma of non-small cell lung cancer (NSCLC) and melanoma using a human tissue microarray. In the presence of TF-positive cancer cells, the CAR-modified T cells (TF-CAR T) were highly activated and showed specific cytotoxicity to TF-positive cancer cells in vitro. In established s.c. xenograft and lung metastasis models, TF-CAR T cells could significantly suppress the growth of s.c. xenograft and metastasis of TF-positive cancer cells. Additionally, the safety evaluation of TF-CAR T cells in vivo showed that the treatment did not cause obvious toxicity in mice. Taken together, these findings indicate that TF-CAR T cells might be a novel potential therapeutic agent for the treatment of patients with TF-positive cancers.
嵌合抗原受体(CAR)修饰的T细胞(CAR T)是癌症患者一种有前景的治疗选择。这种方法需要鉴定在实体瘤中表达的肿瘤特异性抗原靶点。我们开发了一种针对组织因子(TF)的新型第三代CAR,TF是一种在某些类型的肺癌、黑色素瘤和其他癌症中过表达的表面分子。首先,我们使用人组织微阵列通过免疫组织化学证明TF在非小细胞肺癌(NSCLC)的鳞状细胞癌和腺癌以及黑色素瘤中过表达。在存在TF阳性癌细胞的情况下,CAR修饰的T细胞(TF-CAR T)被高度激活,并在体外对TF阳性癌细胞表现出特异性细胞毒性。在已建立的皮下异种移植和肺转移模型中,TF-CAR T细胞可显著抑制皮下异种移植瘤的生长以及TF阳性癌细胞的转移。此外,TF-CAR T细胞在体内的安全性评估表明该治疗在小鼠中未引起明显毒性。综上所述,这些发现表明TF-CAR T细胞可能是治疗TF阳性癌症患者的一种新型潜在治疗药物。
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