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Secretory Expression of a Chimeric Peptide in Lactococcus Lactis: Assessment of Its Cytotoxic Activity and a Deep View on Its Interaction With Cell-Surface Glycosaminoglycans by Molecular Modeling Publisher Pubmed



Tanhaeian A1 ; Jaafari MR2, 3 ; Ahmadi FS1 ; Vakilighartavol R4 ; Sekhavati MH5
Authors
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Authors Affiliations
  1. 1. Department of Biotechnology and Plant Breeding, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
  2. 2. Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
  3. 3. Department of Pharmaceutical Nanotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
  4. 4. Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Animal Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Source: Probiotics and Antimicrobial Proteins Published:2019


Abstract

Nowadays, cancer remains a major cause of death affecting millions of people. Currently, the antimicrobial peptides (AMPs) as potent anticancer therapeutic agents offer specificity and low levels of side effects in cancer therapy. In the present study, a cationic chimeric peptide (cLFchimera), derived from camel lactoferrin, was expressed as a secretory peptide using P170 expression system in L. lactis. Peptide purification was carried out using Ni-NTA agarose column from culture medium with 21 μ/mL concentration. The recombinant peptide was investigated for its activity against four tumor and one normal cell line. The cLFchimera was more active against two tumor cell lines (chondrosarcoma and colorectal cancer cells), but the activity against two other tumor cell lines (hepatoma and breast cancer cell line) and normal cells was low. Finally, to have better insight into the mode of action of the peptide on cytotoxic activity, we examined the interaction of cationic peptide with two glycosaminoglycans (GAGs), heparan sulfate (HS) and chondroitin sulfate (CS), as the two most anionic molecules on the cell surface by molecular dynamic simulation. The results of in silico analysis showed that the cLFchimera interacted with HS and CS with a totally different amino acid profile. Hydrogen bonding screening in GAGs-peptide complexes revealed K21, V23 and I3, R16 are the dominant amino acids involved in peptide-HS and CS interaction, respectively. Overall, the results of this investigation showed the P170 expression system successfully expressed a cationic peptide with potent anticancer activity. Moreover, molecular docking analysis revealed the pattern of peptide interaction with negatively charged membrane molecules. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
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