Pectenotoxin-2 from Marine Sponges: A Potential Anti-Cancer Agent—A Review
AbstractPectenotoxin-2 (PTX-2), which was first identified as a cytotoxic entity in marine sponges, has been reported to display significant cytotoxicity to human cancer cells where it inhibits mitotic separation and cytokinesis through the depolymerization of actin filaments. In the late stage of endoreduplication, the effects of PTX-2 on different cancer cells involves: (i) down-regulation of anti-apoptotic Bcl-2 members and IAP family proteins; (ii) up-regulation of pro-apoptotic Bax protein and tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)-receptor 1/receptor 2 (DR4/DR5); and (iii) mitochondrial dysfunction. In addition, PTX-2 induces apoptotic effects through suppression of the nuclear factor κB (NF-κB) signaling pathway in several cancer cells. Analysis of cell cycle regulatory proteins showed that PTX-2 increases phosphorylation of Cdc25c and decreases protein levels of Cdc2 and cyclin B1. Cyclin-dependent kinase (Cdk) inhibitor p21 and Cdk2, which are associated with the induction of endoreduplication, were upregulated. Furthermore, it was found that PTX-2 suppressed telomerase activity through the transcriptional and post-translational suppression of hTERT. The purpose of this review was to provide an update regarding the anti-cancer mechanism of PTX-2, with a special focus on its effects on different cellular signaling cascades. View Full-Text
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Kim, G.-Y.; Kim, W.-J.; Choi, Y.H. Pectenotoxin-2 from Marine Sponges: A Potential Anti-Cancer Agent—A Review. Mar. Drugs 2011, 9, 2176-2187.
Kim G-Y, Kim W-J, Choi YH. Pectenotoxin-2 from Marine Sponges: A Potential Anti-Cancer Agent—A Review. Marine Drugs. 2011; 9(11):2176-2187.Chicago/Turabian Style
Kim, Gi-Young; Kim, Wun-Jae; Choi, Yung Hyun. 2011. "Pectenotoxin-2 from Marine Sponges: A Potential Anti-Cancer Agent—A Review." Mar. Drugs 9, no. 11: 2176-2187.