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Anti-Microbial Dendrimers against Multidrug-Resistant P. aeruginosa Enhance the Angiogenic Effect of Biological Burn-wound Bandages

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Abdel-Sayed P., Kaeppli A., Siriwardena T., Darbre T., Perron K., Jafari P., Reymond J.-L., Pioletti D. P., Applegate L. A.,
Project A Chemical Space Approach to Bioactive Peptides
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Original article (peer-reviewed)

Journal Nature: Scientific Reports
Volume (Issue) 6
Page(s) 1 - 10
Title of proceedings Nature: Scientific Reports
DOI 10.1038/srep22020

Open Access

Type of Open Access Website


Multi-drug resistant Pseudomonas aeruginosa has increased progressively and impedes further regression in mortality in burn patients. Such wound infections serve as bacterial reservoir for nosocomial infections and are associated with significant morbidity and costs. Anti-microbial polycationic dendrimers G3KL and G3RL, able to kill multi-drug resistant P. aeruginosa, have been previously developed. The combination of these dendrimers with a class of biological bandages made of progenitor skin cells, which secrete growth factors, could positively impact wound-healing processes. However, polycations are known to be used as anti-angiogenic agents for tumor suppression. Since, neovascularization is pivotal in the healing of deep burn-wounds, the use of anti-microbial dendrimers may thus hinder the healing processes. Surprisingly, we have seen in this study that G3KL and G3RL dendrimers can have angiogenic effects. Moreover, we have shown that a dendrimer concentration ranging between 50 and 100 μg/mL in combination with the biological bandages can suppress bacterial growth without altering cell viability up to 5 days. These results show that antimicrobial dendrimers can be used in combination with biological bandages and could potentially improve the healing process with an enhanced angiogenesis.