开发一种重组生物类似单链可变片段抗体,向人类雌激素受体α36-36
Soodabeh Shafiee1, Sedighe Kolivand1, Neda Jalili1
1Recombinant Proteins Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran.
Research in pharmaceutical sciences
|January 29, 2026
概括
研究人员开发了一种特定的抗体片段,针对雌激素受体α-36 (ER-α36),这是乳腺癌中的关键蛋白质. 这种重组抗体在癌细胞中成功与ER-α36结合,为乳腺癌治疗提供了潜在的新策略.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 雌激素受体α-36 (ER-α36) 是ER-α66的替代拼接变体,在ER-α66阳性和ER-α66阴性乳腺瘤中发现.
- 针对ER-α36对于开发新型乳腺癌疗法至关重要,因为它具有临床意义.
研究的目的:
- 开发一种重组,生物相似的单链可变片段 (scFv) 抗体,专门针对ER-α36异型.
- 评估开发的scFv抗体在乳腺癌细胞中识别和结合ER-α36的疗效.
主要方法:
- 获取了抗ER-α36 scFv序列,并将其克隆到pET-28a(+) 载体中,用于Escherichia coli (大肠杆菌) 中的重组表达.
- 蛋白质表达得到了优化,并使用固定金属亲和染色学净化scFv.
- 结合特异性使用酶相关免疫吸收试验 (ELISA) 和ER-α36阳性 (MDA-MB-231) 和阴性 (MCF-10A) 细胞系的流细胞计进行了评估.
主要成果:
- 二甲基硫酸盐聚烯胺凝电泳和西部涂抹证实,表达的scFv抗体的分子量为29kDa.
- 诱导后16小时以25°C的1mM异烯β-D-1-thiogalactopyranoside达到最佳表达.
- 流细胞计和ELISA表明scFv在MDA-MB-231细胞上与ER-α36特异结合,而与ER-α36阴性MCF-10A细胞没有结合.
结论:
- 这个E.E. 大肠杆菌表达系统成功产生了一个功能性的抗ER-α36 scFv抗体片段.
- 纯化的scFv在人类乳腺癌细胞中特别识别并与ER-α36结合,验证了其作为向治疗剂的潜力.
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