Please use this identifier to cite or link to this item: https://scidar.kg.ac.rs/handle/123456789/12234
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dc.rights.licenserestrictedAccess-
dc.contributor.authorMechkarska, Milena-
dc.contributor.authorAttoub S.-
dc.contributor.authorSulaiman, Othman-
dc.contributor.authorPantic, Jelena-
dc.contributor.authorLukic, Miodrag-
dc.contributor.authorConlon, John Michael-
dc.date.accessioned2021-04-20T20:20:34Z-
dc.date.available2021-04-20T20:20:34Z-
dc.date.issued2014-
dc.identifier.issn0167-0115-
dc.identifier.urihttps://scidar.kg.ac.rs/handle/123456789/12234-
dc.description.abstract© 2014 Elsevier B.V. Pseudhymenochirin-1Pb (Ps-1Pb) and pseudhymenochirin-2Pa (Ps-2Pa) are host-defense peptides, first isolated from skin secretions of the frog Pseudhymenochirus merlini (Pipidae). Ps-1Pb and Ps-2Pa are highly cytotoxic (LC50<12μM) against non-small cell lung adenocarcinoma A549 cells, breast adenocarcinoma MDA-MB-231 cells, and colorectal adenocarcinoma HT-29 cells but are also hemolytic against human erythrocytes (LC50=28±2μM for Ps-1Pb and LC50=6±1μM for Ps-2Pa). Ps-2Pa shows selective cytotoxicity for tumor cells (LC50 against non-neoplastic human umbilical vein (HUVEC) cells=68±2μM). Ps-1Pb and Ps-2Pa (5μg/mL) significantly inhibit production of the anti-inflammatory cytokine IL-10 and the multifunctional cytokine IL-6 from lipopolysaccharide (LPS)-stimulated peritoneal macrophages from C57BL/6 mice and enhance the production of the pro-inflammatory cytokine IL-23 from both unstimulated and LPS-stimulated macrophages. Ps-1Pb potently (MIC≤10μM) inhibits growth of multidrug-resistant clinical isolates of the Gram-positive bacteria methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis, and the Gram-negative bacteria Acinetobacter baumannii and Stenotrophomonas maltophilia. Ps-2Pa shows the same high potency (MIC ≤ 10 μM) against the Gram-positive bacteria but is 2-4 fold less potent against the Gram-negative isolates. Ps-1Pb at 4 × MIC kills 99.9% of Escherichia coli within 30. min and 99.9% of S. aureus within 180 min. In conclusion, cytotoxicity against tumor cells, cytokine-mediated immunomodulatory properties, and broad-spectrum antimicrobial activity suggest that the Ps-1Pb and Ps-2Pa represent templates for design of non-hemolytic analogs for tumor therapy and for treatment of infections in cancer patients produced by multidrug-resistant pathogens.-
dc.rightsinfo:eu-repo/semantics/restrictedAccess-
dc.sourceRegulatory Peptides-
dc.titleAnti-cancer, immunoregulatory, and antimicrobial activities of the frog skin host-defense peptides pseudhymenochirin-1Pb and pseudhymenochirin-2Pa-
dc.typearticle-
dc.identifier.doi10.1016/j.regpep.2014.11.001-
dc.identifier.scopus2-s2.0-84921340825-
Appears in Collections:Faculty of Medical Sciences, Kragujevac

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