从合成到生物制剂:化学衍生抗癌疫苗的临床前数据
Jianglong Zhu1, Qian Wan, Dongjoo Lee
1Laboratory for Bioorganic Chemistry, Clinical Immunology Service, Department of Medicine, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10065, USA.
一种新的合成癌症疫苗被开发使用五种瘤相关碳水化合物抗原与KLH结合. 在小鼠的临床前研究表明,它有潜力产生针对癌细胞的抗体.
科学领域:
- 碳水化合物的化学成分
- 免疫学 免疫学 免疫学
- 疫苗的研发工作正在进行中.
背景情况:
- 前列腺癌和乳腺癌表达特定的碳水化合物抗原,如Globo-H,GM2,STn,TF和TN.
- 开发针对这些抗原的合成疫苗是癌症免疫治疗的有希望的策略.
研究的目的:
- 为了合成一个全合成的,五价抗癌疫苗.
- 在临床前模型中评估这种新型候选疫苗的免疫性和疗效.
主要方法:
- 一个单分子五价构造物 (含有五种碳水化合物抗原) 的生物结合,与maleimide修饰的钥匙孔的血清素 (KLH) 结合.
- 优化结合协议以实现高表位比率.
- 在使用QS-21辅助剂的小鼠中进行了临床前免疫原性评估.
- 与酶相关的免疫吸收试验 (ELISA) 和流细胞计 (FACS) 用于抗体检测和基于细胞的试验.
主要成果:
- 一种合成五价糖-KLH合物 (疫苗2) 已成功制备,具有改善的抗原与载体比率 (505/1).
- 艾丽莎检测证实了对所有五种碳水化合物抗原的高水平IgG和IgM抗体的诱导.
- FACS分析显示,诱导的抗体识别了表达这些抗原的MCF-7乳腺癌细胞.
结论:
- 开发的合成五价疫苗具有免疫性,并产生对关键癌症相关碳水化合物抗原的抗体.
- 这种候选疫苗有望进一步发展前列腺癌和乳腺癌免疫疗法.
- 优化的结合策略对于提高疫苗疗效至关重要.
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