摘要:
The present invention is based on the identification of a predominant ligand of CD8+ T cells that are responsible for type 1 diabetes. That ligand is islet-specific glucose-6-phosphatase catalytic subunit-related protein (IGRP). Several CD8+ T cell-binding peptides from IGRP are identified, including the peptide comprising amino acids 206-214 of the IGRP sequence, which has high avidity to the most prevalent T cell receptor of pathogenic CD8+ T cells in autoimmune diabetes. The invention thus provides oligopeptide and polypeptide compositions comprising YLKTN(A/I/L/V)FL (SEQ ID NO:3), FLWSVFWLI (SEQ ID NO:4), (T/A)YY(G/T)FLNFM (SEQ ID NO:5), LR(L/V)(F/L)(G/N)IDLL (SEQ ID NO:6), KWCANPDWI (SEQ ID NO:7), and SFCKSASIP (SEQ ID NO:8). Also provided are oligopeptide compositions 8-10 amino acids in length and completely homologous with a mammalian IGRP, where the oligopeptide is capable of binding a human MHC class I molecule. Additionally, various methods of treating a mammal using the above compositions are provided, where the mammal is at risk for or has type 1 diabetes. Also provided are methods of preventing a CD8+ T cell that is cytotoxic to pancreatic islet β-cells from destroying a mammalian β-cell, where the methods also use the above compositions. Further provided are methods for determining whether a mammal is at risk for or has type 1 diabetes, where the methods use the above compositions.
摘要翻译:本发明基于负责1型糖尿病的CD8 + T细胞的主要配体的鉴定。 该配体是胰岛特异性葡萄糖-6-磷酸酶催化亚单位相关蛋白(IGRP)。 鉴定了来自IGRP的几种CD8 + T细胞结合肽,包括含有IGRP序列的氨基酸206-214的肽,其对自身免疫性糖尿病中病原性CD8 + T细胞最流行的T细胞受体具有高亲合力。 因此,本发明提供包含YLKTN(A / I / L / V)FL(SEQ ID NO:3),FLWSVFWLI(SEQ ID NO:4),(T / A)YY(G / T)FLNFM SEQ ID NO:5),LR(L / V)(F / L)(G / N)IDLL(SEQ ID NO:6),KWCANPDWI(SEQ ID NO:7)和SFCKSASIP(SEQ ID NO:8) 。 还提供了长度为8-10个氨基酸且与哺乳动物IGRP完全同源的寡肽组合物,其中寡肽能够结合人MHC I类分子。 此外,提供使用上述组合物治疗哺乳动物的各种方法,其中哺乳动物处于或具有1型糖尿病的风险。 还提供了防止对胰岛细胞具有细胞毒性的CD8 + T细胞破坏哺乳动物和细胞的方法,其中所述方法也使用上述组合物。 还提供了用于确定哺乳动物是否处于或患有1型糖尿病的风险的方法,其中所述方法使用上述组合物。
摘要:
The present invention is based on the identification of a predominant ligand of CD8+ T cells that are responsible eq for type 1 diabetes. That ligand is islet-specific glucose-6-phosphatase catalytic subunit-related protein (IGRP). Several CD8+ T cell-binding peptides from IGRP are identified, including the peptide comprising amino acids 206-214 of the IGRP sequence, which has high avidity to the most prevalent T cell receptor of pathogenic CD8+ T cells in autoimmune diabetes. The invention thus provides oligopeptide and polypeptide compositions comprising YLKTN/A/I/L/V)FL, FLWSVFWLI, (T/A)YY/G/T)FLNFM, LR(LV)(F/L)(G/N)IDLL, KWCANPDWI, and SFCKSASIP. Also provided are oligopeptide compositions 8-10 amino acids in length and completely homologous with a mammalian IGRP, where the oligopeptide is capable of binding a human MHC class I molecule. Additionally, various methods of treating a mammal using the above compositions are provided, where the mammal is at risk for or has type 1 diabetes. Also provided are methods of preventing a CD8+ T cell that is cytotoxic to pancreatic islet β-cells from destroying a mammalian β-cell, where the methods also use the above compositions. Further provided are methods for determining whether a mammal is at risk for or has type 1 diabetes, where the methods use the above compositions.
摘要翻译:本发明基于鉴定负责1型糖尿病的CD8 + T细胞的主要配体。 该配体是胰岛特异性葡萄糖-6-磷酸酶催化亚单位相关蛋白(IGRP)。 鉴定了来自IGRP的几种CD8 + T细胞结合肽,包括含有IGRP序列的氨基酸206-214的肽,其对自身免疫性糖尿病中病原性CD8 + T细胞最流行的T细胞受体具有高亲合力。 本发明提供包含YLKTN / A / I / L / V)FL,FLWSVFWLI,(T / A)YY / G / T)FLNFM,LR(LV)(F / L)(G / N)的寡肽和多肽组合物 IDLL,KWCANPDWI和SFCKSASIP。 还提供了长度为8-10个氨基酸且与哺乳动物IGRP完全同源的寡肽组合物,其中寡肽能够结合人MHC I类分子。 此外,提供使用上述组合物治疗哺乳动物的各种方法,其中哺乳动物处于或具有1型糖尿病的风险。 还提供了防止对胰岛β细胞具有细胞毒性的CD8 + T细胞破坏哺乳动物β细胞的方法,其中该方法也使用上述组合物。 还提供了用于确定哺乳动物是否处于或患有1型糖尿病的风险的方法,其中所述方法使用上述组合物。