Analysis of novel communication factor exosomes for the treatment and diagnosis of osteoarthritis
Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Date (from‐to) : 2015/04 -2018/03
Author : MIYAKI Shigeru
This study has focused on novel communication factor exosomes including microRNA (miRNA) in osteoarthritis (OA). We performed miRNA expression profiling in chondrocytes and exosomes using mesenchymal stem cells (MSC), normal- and OA-derived chondrocytes, and also performed glycan profiling using these samples. Several miRNAs were highly expressed in normal chondrocytes and chondrocytes-derived exosomes. These miRNAs were decreased in OA chondrocytes and OA chondrocytes-derived exosomes. Furthermore, MSC-derived exosome-formed miRNA reduced severity of OA in OA model mice. Thus, we newly generated these miRNAs knockout and cartilage specific transgenic mice. To examine the effects of chondrocytes-derived exosomes, pre-osteoclasts, pre-osteoblasts and pre-adipocytes were treated with chondrocytes-derived exosomes. Chondrocytes-derived exosomes inhibited osteoclastogenesis. These data suggest that exosomes including miRNA may play an important role in the pathogenesis and treatment of OA.