Fully human monoclonal antibodies to TRAIL-R1 enhance TRAIL-induced apoptosis via activation of caspase-8 pathway

Zhichao Hao, Xiaojian Han, Xin Sun, Meiying Shen, Jingjing Huang, Yaying Li, Tatsuhiko Ozawa, Da Pang, Shoude Jin, Hiroyuki Kishi, Atsushi Muraguchi, Aishun Jin*

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

7 被引用数 (Scopus)

抄録

Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) or agonistic antibodies targeting TRAIL-receptors (TRAIL-Rs) can selectively induce apoptosis in cancer cells. However, they have limited antitumor efficacy in clinical trials. We previously generated ten fully human monoclonal Abs to TRAIL-receptor type 1 (TR1-mAbs) using immunospot array assay on a chip (ISAAC technology). We found that the TR1-mAbs exhibited different effects on TRAIL-induced apoptosis (enhanced or blocked apoptosis). Here, we further demonstrated that some mAbs competed with TRAIL for binding to TRAIL-R1 expressed on tumor cells that blocked TRAIL-induced apoptosis (B-TR1-Ab), whereas others did not compete with TRAIL that enhanced TRAIL-induced apoptosis (E-TR1-Ab). Combination of E-TR1-Ab (TR1-419) with TRAIL leads to enhanced antitumor activity in various tumor cells in vitro. E-TR1-419 and TRAIL could cooperate to upregulate the mRNA expression and protein levels of TRAIL-R1 and to promote caspase-8 cleavage and increased JNK phosphorylation. Our results suggest that combining E-TR1 Ab with TRAIL could provide a new therapeutic strategy for tumor immunotherapies.

本文言語英語
ページ(範囲)238-244
ページ数7
ジャーナルBiochemical and Biophysical Research Communications
475
2
DOI
出版ステータス出版済み - 2016/06/24

ASJC Scopus 主題領域

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学

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