Abstract |
Most chemotherapeutics harm normal cells causing severe side effects and induce the development of resistance in cancer cells. Antimicrobial peptides (AMPs), recognized as anti- cancer agents, may overcome these limitations. The most studied mechanism underlying multi-drug resistance (MDR) is the over-expression of cell membrane transporter P-glycoprotein (P-gp), which extrudes a variety of hydrophobic drugs. Additionally, P-gp contributes to cell membrane composition and increases the net negative charge on cell surface. We postulated that NK-lysin derived cationic peptide NK-2 might discriminate and preferentially eliminate P-gp over-expressing cancer cells. To test this hypothesis, we employed MDR non-small cell lung carcinoma (NCI-H460/R) and colorectal carcinoma (DLD1-TxR) cell lines with high P-gp expression. MDR cancer cells that survived NK-2 treatment had decreased P-gp expression and were more susceptible to doxorubicin. We found that NK-2 more readily eliminated P-gp high-expressing cells. Acting in 'carpet-like' manner NK-2 co-localized with P-gp on the MDR cancer cell membrane. The inhibition of P-gp reduced the NK-2 effect in MDR cancer cells and, vice versa, NK-2 decreased P-gp transport activity. In conclusion, NK-2 could modulate MDR in unique way, eliminating the P-gp high-expressing cells from heterogeneous cancers and making them more vulnerable to classical drug treatment.
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Authors | Jasna Banković, Jörg Andrä, Nataša Todorović, Ana Podolski-Renić, Zorica Milošević, Dorđe Miljković, Jannike Krause, Sabera Ruždijić, Nikola Tanić, Milica Pešić |
Journal | Experimental cell research
(Exp Cell Res)
Vol. 319
Issue 7
Pg. 1013-27
(Apr 15 2013)
ISSN: 1090-2422 [Electronic] United States |
PMID | 23298945
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2012 Elsevier Inc. All rights reserved. |
Chemical References |
- ATP Binding Cassette Transporter, Subfamily B
- ATP Binding Cassette Transporter, Subfamily B, Member 1
- Antimicrobial Cationic Peptides
- Antineoplastic Agents
- NK-lysin
- Peptides
- Proteolipids
- peptide NK-2
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Topics |
- ATP Binding Cassette Transporter, Subfamily B
(metabolism)
- ATP Binding Cassette Transporter, Subfamily B, Member 1
(metabolism)
- Antimicrobial Cationic Peptides
(pharmacology)
- Antineoplastic Agents
(pharmacology)
- Biological Transport
(drug effects)
- Cell Line, Tumor
- Drug Resistance, Multiple
(drug effects)
- Drug Resistance, Neoplasm
(drug effects)
- Humans
- Peptides
(pharmacology)
- Proteolipids
(metabolism)
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