AbstractCarbohydrates are intriguing biomolecules possessing diverse biological activities, including immune stimulating capability. However, their biomedical applications have been limited by their complex and heterogeneous structures. In this study, we have utilized a self‐assembling glycopeptide conjugate (GPC) system to produce uniform nanoribbons appending homogeneous oligosaccharides with multivalency. This system successfully translates the nontrivial structural differences of oligomannoses into varied binding affinities to C‐type lectin receptors (CLRs). We have shown that GPCs could promote the CLR‐mediated endocytosis of ovalbumin (OVA) antigen, and two mannotriose‐modified peptides F3m2 and F3m5 exhibit potent activity in inducing antigen‐presenting cell maturation, as indicated by increased CD86 and MHCII expression. In vivo studies demonstrated that GPCs, combined with OVA antigen, significantly enhanced OVA‐specific antibody production. Specifically, F3m2 and F3m5 exhibited the highest immunostimulatory effects, eliciting both Th1‐ and Th2‐biased immune responses and promoting differentiation of CD4+ and CD8+ T cells. These findings highlight the potential of GPCs as vaccine adjuvants, and showcase their versatility in exploiting the biological functions of carbohydrates.
摘要
碳水化合物是有趣的
生物大分子,具有多种
生物活性,包括免疫刺激能力。然而,由于其结构复杂且异构,其
生物医学应用一直受到限制。在这项研究中,我们利用一种自组装糖肽共轭(
GPC)系统,生产出均匀的纳米带,上面附着具有多价性的同质
寡糖。该系统成功地将低聚
甘露糖的结构差异转化为与 C 型凝集素受体(CLR)的不同结合亲和力。我们的研究表明,
GPCs 可以促进由 CLR 介导的
卵清蛋白(OVA)抗原的内吞,两种
甘露三糖修饰的肽 F3m2 和 F3m5 在诱导抗原递呈细胞成熟方面表现出强大的活性,CD86 和
MHCII 的表达增加就是证明。体内研究表明,
GPCs 与 OVA 抗原结合可显著提高 OVA 特异性
抗体的产生。具体来说,F3m2 和 F3m5 表现出最高的免疫刺激效果,可引起 Th1 和 Th2 偏向的免疫反应,并促进 C
D4+ 和 CD8+ T 细胞的分化。这些发现凸显了
GPC 作为疫苗佐剂的潜力,并展示了它们在利用
碳水化合物生物功能方面的多功能性。