The present invention provides a Pro-cyclic dinucleotide (Pro-CDN) comprising a STING agonist cyclic dinucleotide which is coupled to a linker system. The Pro-CDNs of the present invention can be metabolized at a targeted site into CDNs and exert their full immunomodulatory effects at said targeted site. The present invention also provides conjugates wherein a Pro-CDN is conjugated to a Biologically Active Molecule (BAM) such as e.g. a cytotoxic molecule, a lipid, a protein, a peptide, a nucleic acid, a sugar or a PRR ligand. The invention provides also methods related to the use of such compounds to perform their activities at their targeted sites, to exert cytotoxic, cytostatic or immunomodulatory effects, to treat or to prevent diseases such as cancers, immunological disorders or infections.
本发明提供了一种原环二核苷酸(Pro-CDN),它由 STING 激动剂环二核苷酸与连接体系统耦合而成。本发明的 Pro-CDN 可在靶点代谢成 CDN,并在所述靶点充分发挥免疫调节作用。本发明还提供了共轭物,其中 Pro-CDN 与
生物活性分子(BAM)共轭,例如细胞毒性分子、脂质、蛋白质、肽、核酸、糖或 PRR
配体。本发明还提供了与使用此类化合物有关的方法,以在其靶位点发挥活性,产生细胞毒性、细胞抑制或免疫调节作用,治疗或预防癌症、免疫紊乱或感染等疾病。