MSP-4, an Antimicrobial Peptide, Induces Apoptosis via Activation of Extrinsic Fas/FasL- and Intrinsic Mitochondria-Mediated Pathways in One Osteosarcoma Cell Line

• Published in: Marine drugs Vol. 16; no. 1; p. 8
• Main Authors: Kuo, Hsiao-Mei, Tseng, Chung-Chih, Chen, Nan-Fu, Tai, Ming-Hong, Hung, Han-Chun, Feng, Chien-Wei, Cheng, Shu-Yu, Huang, Shi-Ying, Jean, Yen-Hsuan, Wen, Zhi-Hong
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 02.01.2018; MDPI
• Subjects: Anticancer properties; Antiinfectives and antibacterials; Antimicrobial peptides; Apoptosis; Biocompatibility; Bone cancer; Cancer; Caspase; Caspase-3; Caspase-8; Caspase-9; Cells; Drugs; FasL protein; Fish; Freshwater fishes; Inhibitors; Low concentrations; Mitochondria; Molecular weight; Oreochromis niloticus; Osteosarcoma; Peptides; Permeability; Pretreatment; Sarcoma; Tilapia; apoptosis; antimicrobial peptide; Fas/FasL pathway; mitochondria pathways; osteosarcoma
• ISSN: 1660-3397; 1660-3397
• DOI: 10.3390/md16010008

Osteosarcoma (OS) is a common malignant bone cancer. The relatively high density of a person's bone structure means low permeability for drugs, and so finding drugs that can be more effective is important and should not be delayed. MSPs are marine antimicrobial peptides (AMP) and natural compounds extracted from Nile tilapia ( ). MSP-4 is a part of the AMPs series, with the advantage of having a molecular weight of about 2.7-kDa and anticancer effects, although the responsible anticancer mechanism is not very clear. The goal of this study is to determine the workings of the mechanism associated with apoptosis resulting from MSP-4 in osteosarcoma MG63 cells. The study showed that MSP-4 significantly induced apoptosis in MG63 cells, with Western blot indicating that MSP-4 induced this apoptosis through an intrinsic pathway and an extrinsic pathway. Thus, a pretreatment system with a particular inhibitor of Z-IETD-FMK (caspase-8 inhibitor) and Z-LEHD-FMK (caspase-9 inhibitor) significantly attenuated the cleavage of caspase-3 and prevented apoptosis. These observations indicate that low concentrations of MSP-4 can help induce the apoptosis of MG63 through a Fas/FasL- and mitochondria-mediated pathway and suggest a potentially innovative alternative to the treatment of human osteosarcoma.