Melittin Inhibits Growth of Human Osteosarcoma 143B Cells through
Induction of Apoptosis via Suppressing the Wnt/β-catenin Signaling Pathway

Xiaoliang      Xie; Yumei      Li; Haixia      Zhu; Lin      Chen; Deta      Chen; Shengming      Lin; Tianyou      Fan

doi:10.2174/1871520622666220509121627

Abstract

Background and Purpose: Osteosarcoma is the most commonly seen type of primary malignant bone tumors in children and adolescents. Partial patients with osteosarcoma cannot tolerate the side effects of chemotherapy drugs. Hence, it is urgent to find anti-osteosarcoma drugs with low side effects. Melittin is an anti-tumor Traditional Chinese Medicine with low side effects. The purpose of this study was to explore the anti-osteosarcoma effect of melittin and its possible molecular mechanisms.

Methods: The effects of melittin on cell growth were detected by CCK-8, clonal formation, and flow cytometry. The related molecules were also investigated by Real-time PCR and Western blot. A xenograft model in nude mice was established to observe the effects of melittin on tumor growth and the related molecular expression was detected by immunohistochemistry.

Results: Melittin can inhibit the proliferation of osteosarcoma 143B cells, reduce colony formation, and induce apoptosis while significantly up-regulating the expression of Bax and Caspase-3 and down-regulating the expression of Bcl-2 proteins. Moreover, treatment with melittin significantly reduced the mRNA and protein levels of β-catenin and Wnt/β- catenin related genes (LRP5, c-Myc, and Survivin) in osteosarcoma 143B cells in vitro. The xenograft model found that melittin significantly inhibited tumor growth and decreased the protein expression levels of β-catenin and Wnt/β- catenin related genes in vivo.

Conclusion: These findings show that melittin could inhibit the growth of osteosarcoma 143B cells, which may be related to the inhibition of Wnt/β-catenin signaling pathway activity and induce apoptosis by up-regulating the ratio of Bax/Bcl-2 in osteosarcoma 143B cells. Therefore, melittin is a promising anti-tumor drug for the treatment of osteosarcoma.

Keywords: Melittin, osteosarcoma, cell proliferation, apoptosis, xenografts, β-catenin.

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DOI https://dx.doi.org/10.2174/1871520622666220509121627	Print ISSN 1871-5206
Publisher Name Bentham Science Publisher	Online ISSN 1875-5992

Anti-Cancer Agents in Medicinal Chemistry

Melittin Inhibits Growth of Human Osteosarcoma 143B Cells through Induction of Apoptosis via Suppressing the Wnt/β-catenin Signaling Pathway

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