使用ectodomain抗体操纵PTPRD功能
Zhe Qian1,2, Dongyan Song1, Jonathan J Ipsaro3
1Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.
Genes & development
|September 5, 2023
概括
针对受体蛋白氨酸酸酶三角体 (RPTPδ/PTPRD) 的抗体抑制其活性并促进降解,抑制促进瘤信号和细胞入侵.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 药物开发 药物开发
背景情况:
- 蛋白氨酸酸酶 (PTPs) 调节信号转导,但它们是未被充分研究的药物标.
- 受体蛋白氨酸酸酶三角酶 (RPTPδ/PTPRD) 通过增加SRC活性,促进瘤进展和转移.
- 受体蛋白氨酸酸酶 (RPTPs) 的抑制与二分化有关.
研究的目的:
- 开发针对RPTPδ/PTPRD细胞外域的抗体,以调节二分化和信号传递.
- 研究向癌症中的RPTPδ/PTPRD的治疗潜力.
主要方法:
- 对PTPRD外域产生抗体.
- 在转移性乳腺癌细胞中对内源性PTPRD的抗体结合的验证 (CAL51).
- 评估抗体诱导的酸酶活性,二分化和降解途径 (溶酶和蛋白质酶) 的变化.
主要成果:
- 单克隆抗体RD-43结合了内源性PTPRD,抑制了其酸酶活性,并诱导了PTPRD降解.
- RD-43触发了PTPRD的二元化,从而损害了催化活性.
- 抗体介导的PTPRD降解通过 lysosomal 和 proteasomal 途径发生,独立于分泌酶裂解.
- RD-43治疗抑制了SRC信号传递和PTPRD依赖的细胞入侵.
结论:
- 用抗体准细胞外RPTPδ/PTPRD可以抑制其促进瘤的功能.
- 抗体诱导的二分化和随后的RPTPδ/PTPRD降解是可行的治疗策略.
- 这种方法对RPTPδ/PTPRD驱动的癌症具有治疗潜力.
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