Lycium barbarum glycopeptide reduces bone loss caused by exosomes derived from human gingival fibroblasts with radiation exposure
10.12122/j.issn.1673-4254.2024.09.15
- VernacularTitle:枸杞糖肽可减轻放射治疗后人牙龈成纤维细胞来源的外泌体导致的成骨抑制
- Author:
Siqi HE
1
;
Nan WEN
;
Xun CHEN
;
Yue WANG
;
Tin ZHANG
;
Yandong MU
Author Information
1. 成飞医院,四川 成都 610073
- Keywords:
Lycium barbarum glycopeptide;
exosomes;
osteoradionecrosis of the jaw;
osteogenic differentiation
- From:
Journal of Southern Medical University
2024;44(9):1752-1759
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the protective effect of Lycium barbanun glycopeptide(LbGP)against osteogenic inhibition induced by exosomes derived from human gingival fibroblasts(HGFs)exposed to radiation.Methods Cultured HGFs with or without LbGP pretreatment were exposed to 8 Gy X-ray radiation,and the changes in cell apoptosis,senescence and α-SMA level were detected using RT-qPCR,Western blotting and β-galactosidase staining.The exosomes secreted by the treated cells were extracted,and after identification by electron microscopy,particle size analysis and Western blotting,the exosomes were added into primary cultured bone mesenchymal stem cells(BMSCs),and osteoclast activity and osteogenesis in the cell cultures were detected by Trap staining,Alizarin red staining,ALP staining,RT-qPCR and Western blotting.Results In cultured HGFs,X-ray radiation significantly increased the percentage of senescent cells,which was obviously lowered by LbGP treatment.X-ray radiation significantly reduced Bcl-2/Bax ratio and increased α-SMA expression in HGFs,and these changes were significantly suppressed by LbGP pretreatment.In rat BMSCs,incubation with the exosomes derived from HGFs with radiation exposure caused a significant increase of osteoclasts,reduced calcium nodules and lowered alkaline phosphatase expression in the cells;The opposite changes were observed in the cells treated with exosomes from LbGP-pretreated HGFs,which also significantly increased the cellular expressions of the osteogenic genes(BMP2,ALP,and RUNX2)and proteins(ALP and RUNX2)as compared with the exosomes from irradiated HGFs.Conclusion LbGP can effectively inhibit osteoclast activity and promote osteogenesis by acting on exosomes secreted by irradiated HGFs,suggesting its potential value for treatment of osteoradionecrosis of the jaw.
