Amino Acids

, Volume 49, Issue 6, pp 1053–1067 | Cite as

Comparative analysis of internalisation, haemolytic, cytotoxic and antibacterial effect of membrane-active cationic peptides: aspects of experimental setup

  • Kata Horváti
  • Bernadett Bacsa
  • Tamás Mlinkó
  • Nóra Szabó
  • Ferenc Hudecz
  • Ferenc Zsila
  • Szilvia Bősze
Original Article
  • 357 Downloads

Abstract

Cationic peptides proved fundamental importance as pharmaceutical agents and/or drug carrier moieties functioning in cellular processes. The comparison of the in vitro activity of these peptides is an experimental challenge and a combination of different methods, such as cytotoxicity, internalisation rate, haemolytic and antibacterial effect, is necessary. At the same time, several issues need to be addressed as the assay conditions have a great influence on the measured biological effects and the experimental setup needs to be optimised. Therefore, critical comparison of results from different assays using representative examples of cell penetrating and antimicrobial peptides was performed and optimal test conditions were suggested. Our main goal was to identify carrier peptides for drug delivery systems of antimicrobial drug candidates. Based on the results of internalisation, haemolytic, cytotoxic and antibacterial activity assays, a classification of cationic peptides is advocated. We found eight promising carrier peptides with good penetration ability of which Penetratin, Tat, Buforin and Dhvar4 peptides showed low adverse haemolytic effect. Penetratin, Transportan, Dhvar4 and the hybrid CM15 peptide had the most potent antibacterial activity on Streptococcus pneumoniae (MIC lower than 1.2 μM) and Transportan was effective against Mycobacterium tuberculosis as well. The most selective peptide was the Penetratin, where the effective antimicrobial concentration on pneumococcus was more than 250 times lower than the HC50 value. Therefore, these peptides and their analogues will be further investigated as drug delivery systems for antimicrobial agents.

Keywords

Cationic peptides Cell penetrating peptide Antimicrobial peptide Antibacterial drug carrier Haemolysis Tuberculosis 

Notes

Acknowledgements

This work was supported by the Hungarian Research Fund (115431 and 104275) and by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences (bo_87_15). The authors thank Dr. Hedvig Medzihradszky-Schweiger for the amino acid analysis and Mr. Sándor Dávid for the antimycobacterial testing.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Funding

This study was funded by the Hungarian Research Fund (115431 and 104275) and by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences (bo_87_15).

Informed consent

The authors confirm that this work is new and original and not under consideration elsewhere. Our institute, the MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, and all authors have agreed to the submission of this manuscript.

Research involving human participants and/or animals

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

726_2017_2402_MOESM1_ESM.docx (234 kb)
Supplementary material 1 (DOCX 234 kb)

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© Springer-Verlag Wien 2017

Authors and Affiliations

  1. 1.MTA-ELTE Research Group of Peptide ChemistryHungarian Academy of SciencesBudapestHungary
  2. 2.Laboratory of BacteriologyKorányi National Institute for Tuberculosis and Respiratory MedicineBudapestHungary
  3. 3.Department of Organic ChemistryEötvös Loránd UniversityBudapestHungary
  4. 4.Biomolecular Self-Assembly Group, Research Centre for Natural Sciences, Institute of Materials and Environmental ChemistryHungarian Academy of SciencesBudapestHungary

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