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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
Published on: June 8, 2014
Artemether attenuates LPS-induced inflammatory bone loss by inhibiting osteoclastogenesis and bone resorption via
Haobo Wu1,2, Bin Hu1,2, Xiaopeng Zhou1,2
1Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China.
Abstract:
Osteolysis is an osteolytic lesion featured by enhanced osteoclast formation and potent bone erosion. Lacking of effective regimen for treatment of the pathological process highlights the importance of identifying agents that can suppress the differentiation and function of osteoclast. Artemether is a natural compound derived from Artemisia annua L. and it is popularized for the treatment of malaria. In present study, we demonstrated that artemether could suppress RANKL-induced osteoclastogenesis and expression of osteoclast marker genes such as tartrate-resistant acid phosphatase, cathepsin K, matrix metalloproteinase 9, nuclear factor of activated T-cell cytoplasmic 1, and dendritic cell-specific transmembrane protein. It inhibited the osteoclastic bone resorption in a dose-dependent manner in vitro. Furthermore, artemether attenuated RANKL-induced MAPKs (ERK, JNK, p-38) activity. In addition, we have showed that artemether was able to mitigate bone erosion in a murine model of LPS-induced inflammatory bone loss. Taken together, these findings suggest that artemether reduces inflammatory bone loss via inhibition of MAPKs activation during osteoclast differentiation, and it might be a potential candidate for the treatment of osteoclast-related disorders.
Insights
Artemether, a malaria drug, effectively suppresses osteoclast formation and bone erosion by inhibiting key signaling pathways. This natural compound shows potential for treating bone loss disorders.
Area of Science:
- Biochemistry
- Pharmacology
- Osteology
Background:
- Osteolysis involves increased osteoclast activity and bone erosion, necessitating treatments that inhibit osteoclast differentiation and function.
- Artemether, derived from Artemisia annua L., is primarily known for its antimalarial properties.
Purpose of the Study:
- To investigate artemether's potential to suppress osteoclastogenesis and mitigate inflammatory bone loss.
- To elucidate the molecular mechanisms underlying artemether's effects on osteoclasts.
Main Methods:
- Assessing artemether's impact on RANKL-induced osteoclastogenesis and marker gene expression in vitro.
- Evaluating artemether's inhibition of osteoclastic bone resorption and MAPKs (ERK, JNK, p-38) activity.
- Testing artemether's efficacy in a murine model of LPS-induced inflammatory bone loss.
Main Results:
- Artemether suppressed RANKL-induced osteoclastogenesis and key osteoclast marker genes.
- The compound inhibited osteoclastic bone resorption and attenuated RANKL-induced MAPKs activation.
- Artemether mitigated bone erosion in a murine model of inflammatory bone loss.
Conclusions:
- Artemether reduces inflammatory bone loss by inhibiting MAPKs activation during osteoclast differentiation.
- Artemether demonstrates potential as a therapeutic agent for osteoclast-related bone disorders.
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