Albumin/vaccine nanocomplexes that assemble in vivo for combination cancer immunotherapy.

Albumin/vaccine nanocomplexes that assemble in vivo for combination cancer immunotherapy.
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可在体内组装用于组合癌症免疫治疗的白蛋白/疫苗纳米复合物

DOI:
10.1038/s41467-017-02191-y
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发表时间:
2017-12-05
影响因子:
16.6
通讯作者:
Chen X
Chen X
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhu G;Lynn GM;Jacobson O;Chen K;Liu Y;Zhang H;Ma Y;Zhang F;Tian R;Ni Q;Cheng S;Wang Z;Lu N;Yung BC;Wang Z;Lang L;Fu X;Jin A;Weiss ID;Vishwasrao H;Niu G;Shroff H;Klinman DM;Seder RA;Chen X

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亚单位疫苗已经在超过1000项癌症免疫治疗的临床试验中进行了研究,但显示出有限的功效。纳米疫苗可以提高疗效,但很少被临床转化。通过将分子疫苗与伊文思蓝(EB)缀合成白蛋白结合疫苗(AlbiVax),在这里,我们开发了具有临床前景的白蛋白/AlbiVax纳米复合物,其在体内从AlbiVax和内源性白蛋白自组装,用于有效的疫苗递送和有效的癌症免疫治疗。PET药物成像、超分辨率显微镜和流式细胞术显示,白蛋白/AlbiVax将CpG和抗原(Ag)共同递送至淋巴结(LN)的效率比基准不完全弗氏佐剂(IFA)高近100倍。白蛋白/AlbiVax激发具有免疫记忆的外周抗原特异性CD 8+细胞毒性T淋巴细胞的频率比IFA乳化疫苗高约10倍。白蛋白/AlbiVax特异性抑制已建立的原发性或转移性EG7.OVA、B16 F10和MC 38肿瘤的进展;与抗PD-1和/或Abraxane联合使用可进一步增强免疫治疗并根除大多数MC 38肿瘤。因此,白蛋白/AlbiVax纳米复合物是用于联合癌症免疫疗法的稳健平台。白蛋白缀合物可以增强药物递送。在这里,作者重新利用白蛋白结合伊文思蓝开发纳米疫苗,将佐剂和肿瘤新抗原共同递送到淋巴结中的抗原呈递细胞,从而在联合免疫治疗中产生有效和持久的抗肿瘤免疫力。
Subunit vaccines have been investigated in over 1000 clinical trials of cancer immunotherapy, but have shown limited efficacy. Nanovaccines may improve efficacy but have rarely been clinically translated. By conjugating molecular vaccines with Evans blue (EB) into albumin-binding vaccines (AlbiVax), here we develop clinically promising albumin/AlbiVax nanocomplexes that self-assemble in vivo from AlbiVax and endogenous albumin for efficient vaccine delivery and potent cancer immunotherapy. PET pharmacoimaging, super-resolution microscopies, and flow cytometry reveal almost 100-fold more efficient co-delivery of CpG and antigens (Ags) to lymph nodes (LNs) by albumin/AlbiVax than benchmark incomplete Freund’s adjuvant (IFA). Albumin/AlbiVax elicits ~10 times more frequent peripheral antigen-specific CD8+ cytotoxic T lymphocytes with immune memory than IFA-emulsifying vaccines. Albumin/AlbiVax specifically inhibits progression of established primary or metastatic EG7.OVA, B16F10, and MC38 tumors; combination with anti-PD-1 and/or Abraxane further potentiates immunotherapy and eradicates most MC38 tumors. Albumin/AlbiVax nanocomplexes are thus a robust platform for combination cancer immunotherapy. Albumin conjugates can enhance drug delivery. Here, the authors repurpose albumin-binding Evans blue to develop nanovaccines that co-deliver adjuvants and tumor neoantigens to antigen-presenting cells in lymph nodes, resulting in potent and durable antitumour immunity in combination immunotherapy.
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