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    • 41. 发明授权
    • Methods for modulating T cell responses by manipulating intracellular signal transduction
    • 通过操纵细胞内信号转导来调节T细胞应答的方法
    • US06632789B1
    • 2003-10-14
    • US08245282
    • 1994-04-29
    • Carl H. June
    • Carl H. June
    • A01N6100
    • A61K31/365A61K31/00A61K31/35
    • Methods for modulating T cell responses by manipulating intracellular signals associated with T cell costimulation are disclosed. The methods involve inhibiting or stimulating the production of at least one D3-phosphoinositide in a T cell. Production of D3-phosphoinositides can be manipulated by contacting a T cell with an inhibitor or activator of phosphatidylinositol 3-kinase. Inhibitors of phosphatidylinositol 3-kinase for use in the methods of the invention include wortmannin and quercetin, or derivatives or analogues thereof. The methods of the invention can further comprise modulating other intracellular signals associated with costimulation, such as protein tyrosine phosphorylation, for example by modulating the activity of a protein tyrosine kinase or a protein tyrosine phosphatase in the T cell. Inhibition of a T cell response in accordance with the disclosed methods is useful therapeutically in situations where it is desirable to inhibit an immune response to an antigen(s), for example in organ or bone marrow transplantation and autoimmune diseases. Alternatively, stimulation of a T cell response in accordance with the disclosed methods is useful therapeutically to enhance an immune response to an antigen(s), for example to stimulate an anti-tumor response in a subject with a tumor, to stimulate a response against a pathogenic agent or increase the efficacy of vaccination. Novel screening assays for identifying inhibitors or activators of phosphatidylinositol 3-kinase, which can be used to inhibit or stimulate a T cell response, are also disclosed.
    • 公开了通过操作与T细胞共刺激相关的细胞内信号调节T细胞应答的方法。 所述方法包括抑制或刺激T细胞中至少一种D3-磷酸肌醇的产生。 可以通过使T细胞与磷脂酰肌醇3-激酶的抑制剂或活化剂接触来操作D3-磷酸肌醇的生产。 用于本发明方法的磷脂酰肌醇3-激酶的抑制剂包括渥曼青霉素和槲皮素,或其衍生物或类似物。 本发明的方法还可以包括调节与共刺激相关的其它细胞内信号,例如蛋白酪氨酸磷酸化,例如通过调节T细胞中的蛋白质酪氨酸激酶或蛋白质酪氨酸磷酸酶的活性。 根据所公开的方法抑制T细胞应答在需要抑制对抗原的免疫应答(例如在器官或骨髓移植和自身免疫性疾病中)的情况下是有用的。 或者,根据所公开的方法刺激T细胞应答在治疗上对于增强对抗原的免疫应答是有用的,例如用于刺激患有肿瘤的受试者的抗肿瘤反应,以刺激对抗 致病剂或增加疫苗的功效。 还公开了用于鉴定可用于抑制或刺激T细胞应答的磷脂酰肌醇3-激酶的抑制剂或活化剂的新型筛选试验。