The Antitumor Peptide CIGB-552 Increases COMMD1 and Inhibits Growth of Human Lung Cancer Cells

• Published in: Journal of Amino Acids Vol. 2013; no. 2013; pp. 42 - 54
• Main Authors: Fernández Massó, Julio R., Oliva Argüelles, Brizaida, Tejeda, Yelaine, Astrada, Soledad, Garay, Hilda, Reyes, Osvaldo, Delgado-Roche, Livan, Bollati-Fogolín, Mariela, Vallespí, Maribel G.
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Limiteds 01.01.2013; Hindawi Puplishing Corporation; Hindawi Publishing Corporation; Hindawi Limited
• Subjects: Antioxidants; Apoptosis; Biotechnology; Cancer cells; Care and treatment; Cloning; Cytotoxicity; Genetic engineering; Health aspects; Lung cancer; Oxidative stress; Peptides; Physiological aspects; Plasmids; Proteins; Statistics; Studies; Yeast; Cuba; Uruguay
• ISSN: 2090-0112; 2090-0104; 2090-0112
• DOI: 10.1155/2013/251398

We have demonstrated that the peptide L-2 designed from an alanine scanning of the Limulus-derived LALF32-51 region is a potential candidate for the anticancer therapy and its cell-penetrating capacity is an associated useful property. By the modification in the primary structure of L-2, a second-generation peptide (CIGB-552) was developed. However, the molecular mechanism underlying its cytotoxic activity remains partially unknown. In this study, it was shown that CIGB-552 increases the levels of COMMD1, a protein involved in copper homeostasis, sodium transport, and the NF-κB signaling pathway. We found that CIGB-552 induces ubiquitination of RelA and inhibits the antiapoptotic activity regulated by NF-κB, whereas the knockdown of COMMD1 blocks this effect. We also found that CIGB-552 decreases the antioxidant capacity and induces the peroxidation of proteins and lipids in the tumor cells. Altogether, this study provides new insights into the mechanism of action of the peptide CIGB-552, which could be relevant in the design of future anticancer therapies.