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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 (LC 50 <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...
Frog skin constitutes a rich source of peptides with a wide range of biological properties. These include host-defense peptides with cytotoxic activities against bacteria, fungi, protozoa, viruses, and mammalian cells. Several hundred such peptides from diverse species have been described. Although attention has been focused mainly on antimicrobial activity, the therapeutic potential of frog skin...
The hymenochirins are a family of cationic, amphipathic, α-helical host-defense peptides, first isolated from skin secretions of the Congo clawed frog Hymenochirus boettgeri (Pipidae). Of the four hymenochirins tested, hymenochirin-1B (IKLSPETKDNLKKVLKGAIKGAIVAKMV.NH 2 ) shows the greatest cytotoxic potency against non-small cell lung adenocarcinoma A549 cells (LC 50 =2.5±0.2μM), breast...
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