申请人:——
公开号:US20020177551A1
公开(公告)日:2002-11-28
The present invention comprises compositions and methods for treating a tumor or neoplastic disease in a host, The methods employ conjugates comprising superantigen polypeptides, nucleic acids with other structures that preferentially bind to tumor cells and are capable of inducing apoptosis. Also provided are superantigen-glycolipid conjugates and vesicles that are loaded onto antigen presenting cells to activate both T cells and NKT cells. Cell-based vaccines comprise tumor cells engineered to express a superantigen along with glycolipids products which, when expressed, render the cells capable of eliciting an effective anti-tumor immune response in a mammal into which these cells are introduced. Included among these compositions are tumor cells, hybrid cells of tumor cells and accessory cells, preferably dendritic cells. Also provided are tumoricidal T cells and NKT cells devoid of inhitory receptors or inhibitory signaling motifs which are hyperresponsive to the the above compositions and lipid-based tumor associated antigens that can be administered for adoptive immunotherapy of cancer and infectious diseases.
本发明涉及一种用于治疗宿主体内肿瘤或肿瘤性疾病的组合物和方法。该方法采用包含超抗原多肽、具有其他结构的核酸和优先结合于肿瘤细胞并能够诱导细胞凋亡的结构的共轭物。还提供了超抗原-糖脂共轭物和负载于抗原呈递细胞上的囊泡,以激活T细胞和NKT细胞。基于细胞的疫苗包括肿瘤细胞,这些肿瘤细胞被改造以表达超抗原和糖脂产物,当这些细胞被引入哺乳动物体内时,这些细胞能够引起有效的抗肿瘤免疫反应。这些组合物包括肿瘤细胞、肿瘤细胞和辅助细胞的杂交细胞,优选为树突状细胞。还提供了无抑制性受体或抑制性信号基序的肿瘤细胞杀伤T细胞和NKT细胞,这些细胞对上述组合物和基于脂质的肿瘤相关抗原具有高度反应性,可用于癌症和传染病的免疫治疗。