Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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Macrophage-secreted Exosomes Delivering miRNA-21 Inhibitor can Regulate BGC-823 Cell Proliferation

  • Wang, Jian-Jun (Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to JiangSu University) ;
  • Wang, Ze-You (Department of Clinical Laboratory, The Second Xiangya Hospital of Central South University) ;
  • Chen, Rui (Department of Pathology, Chongqing Cancer Institute) ;
  • Xiong, Jing (Department of Ophthalmology, Xiangya Hospital, Central South University) ;
  • Yao, Yong-Liang (Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to JiangSu University) ;
  • Wu, Jian-Hong (Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to JiangSu University) ;
  • Li, Guang-Xin (Department of Pathology, Chongqing Cancer Institute)
  • Published : 2015.06.03
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Abstract

Exosomes, membranous nanovesicles, naturally carry bio-macromolecules or miRNA and play impoetant roles in tumor pathogenesis. Here, we showed that macrophages cell-derived exosomes can function as vehicles to deliver exogenous miR-21 inhibitor into BGC-823 gastric cancer cells. Exosomes loaded with miR-21inhibitor significantly increased miR-21 levels in BGC-823, but miR-21inhibitor loaded in exosomes exerted an opposite effect. miRNA transfected with exosomes had less cellular toxicity to host cells compared to conventional transfection methods. The miR-21inhibitor loaded exosomes promoted the migration ability and reduced apoptosis of BGC-823 gastric cancer cells. These observations indicate that miR-21 acts as a tumor promoter by targeting the PDCD4 gene and preventing apoptosis of gastric cancer cells through inhibition of PDCD4 expression. Furthermore, exosome -mediated miR-21 inhibitor delivery resulted in functionally more efficient inhibition and less cellular toxicity compared to conventional transfection methods. Similar approaches could be useful in modification of target biomolecules in vitro and in vivo. These findings contribute to our understanding of the functions of miR-21 and exosomes as a carrier for therapy of gastric cancer.

Keywords

References

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