The present disclosure pertains to the recognition that immune responses mediated by CpG oligonucleotides can be affected by the stereochemistry of modified internucleotidic linkages such as phosphorothioates. In some embodiments, the present disclosure relates to chirally controlled CpG oligonucleotide compositions comprising CpG oligonucleotides comprising multiple modified internucleotidic linkages such as phosphorothioate linkages, wherein the oligonucleotides comprise one or more CpG region motifs having defined stereochemistry patterns of chiral internucleotidic linkages. In some embodiments, CpG oligonucleotides comprising one or more CpG region motifs are capable of agonizing an immune response. In some embodiments, CpG oligonucleotides comprising one or more CpG region motifs are antagonistic. Methods for making and using chirally controlled CpG oligonucleotide compositions are also described. In some embodiments, no immune modulation is desired, and the present disclosure provides methods of identifying chirally controlled oligonucleotide compositions which have decreased immune modulation.
本公开涉及到一种认识,即由CpG寡核苷酸介导的免疫反应可能会受到修饰的核苷酸间连接的立体
化学结构的影响,例如
磷酸硫酯。在某些实施例中,本公开涉及到手性控制的CpG寡核苷酸组合物,包括包含多个修饰的核苷酸间连接,如
磷酸硫酯连接的CpG寡核苷酸,其中这些寡核苷酸包含一个或多个具有定义的手性核苷酸间连接模式的CpG区域基序。在某些实施例中,包含一个或多个CpG区域基序的CpG寡核苷酸能够激活免疫反应。在某些实施例中,包含一个或多个CpG区域基序的CpG寡核苷酸是拮抗性的。还描述了制备和使用手性控制的CpG寡核苷酸组合物的方法。在某些实施例中,不需要免疫调节,本公开提供了一种识别具有降低免疫调节的手性控制寡核苷酸组合物的方法。