Chemical synthesis and immunological evaluation of entirely carbohydrate conjugate Globo H-PS A1.

Chemical synthesis and immunological evaluation of entirely carbohydrate conjugate Globo H-PS A1.
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DOI:
10.1039/d0sc04595k
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发表时间:
2020-10-19
期刊:
影响因子:
8.4
通讯作者:
Andreana PR
Andreana PR
中科院分区:
化学1区
文献类型:
--
作者:
Ghosh S;Trabbic KR;Shi M;Nishat S;Eradi P;Kleski KA;Andreana PR

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通过化学方法制备了一种完全碳水化合物缀合物的抗癌药物 Globo H-多糖 A1 (Globo H-PS A1),并在 C57BL/6 小鼠中进行了免疫学评估。采用收敛 [3 + 3] 策略合成肿瘤相关碳水化合物抗原 Globo H 六糖,总产率为 7.8%,该策略揭示了用于通过肟键与氧化 PSA1 缀合的异头氨氧基。 Globo H-PS A1,由单磷酰脂质 A 和 TiterMax® Gold 佐剂配制而成。免疫后,使用抗 Globo H IgG/IgM 抗体在 ELISA 中观察到抗原特异性免疫反应。通过 FACS 测定相应抗体的特异性,显示细胞表面与 Globo H 阳性癌细胞系 MCF-7 和 OVCAR-5 的结合。抗 Globo H 抗体还表现出针对 MCF-7 和 OVCAR-5 细胞的补体依赖性细胞毒性。通过化学方法制备了一种完全碳水化合物缀合物的抗癌药物 Globo H-多糖 A1 (Globo H-PS A1),并在 C57BL/6 小鼠中进行了免疫学评估。
An anticancer, entirely carbohydrate conjugate, Globo H-polysaccharide A1 (Globo H-PS A1), was chemically prepared and immunologically evaluated in C57BL/6 mice. Tumor associated carbohydrate antigen Globo H hexasaccharide was synthesized in an overall 7.8% yield employing a convergent [3 + 3] strategy that revealed an anomeric aminooxy group used for conjugation to oxidized PS A1 via an oxime linkage. Globo H-PS A1, formulated with adjuvants monophosphoryl lipid A and TiterMax® Gold. After immunization an antigen specific immune response was observed in ELISA with anti-Globo H IgG/IgM antibodies. Specificity of the corresponding antibodies was determined by FACS showing cell surface binding to Globo H-positive cancer cell lines MCF-7 and OVCAR-5. The anti-Globo H antibodies also exhibited complement-dependent cellular cytotoxicity against MCF-7 and OVCAR-5 cells. An anticancer, entirely carbohydrate conjugate, Globo H-polysaccharide A1 (Globo H-PS A1), was chemically prepared and immunologically evaluated in C57BL/6 mice.
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