Effects of Sangu Decoction on OPG-RANKL-RANK pPathway in rat model of metastatic carcinoma / 中华中医药杂志

ABSTRACT

Objective:To evaluate the anti-metastatic and bone preserving therapeutic effects of herbal medicine extraction on rat model of bone metastatic carcinoma.Methods:A rat model of cancer-induced bone pain using the MRMT-1 cell line injected into the tibia was established to investigate the efficacy of the herbal medicine extraction,on osteoclast activity and bone mineral density.The development of the bone tumor and structural damage to the bone was monitored by radiological analysis.Specimens of the tibial bone were processed for tartrate-resistant acid phosphatase(TRAP)stain to observe the bone pathological changes and count TRAP stained osteoclasts.OPG and RANKL expression was evaluated by immunohistological methord.Results:Histological and radiological examination showed that the herbal medicine extraction significantly inhibited tumor proliferation and preserved the cortical and trabecular bone structure.In addition,a dramatic reduction of tartrate resistant acid phosphatase-positive polykaryocytes(osteoclasts)and increase of OPG expression were observed.Conclusions:The herbal medicine extraction was an anti-metastatic and bone preserving therapeutic effects in a rat model of metastatic cancer pain.