Forskning ved Københavns Universitet - Københavns Universitet

Forside

Peptide-Loaded Cubosomes Functioning as an Antimicrobial Unit against Escherichia coli

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Dispersions of cubic liquid crystalline phases, also known as cubosomes, have shown great promise as delivery vehicles for a wide range of medicines. Due to their ordered structure, comprising alternating hydrophilic and hydrophobic domains, cubosomes possess unique delivery properties and compatibility with both water-soluble and -insoluble drugs. However, the drug delivery mechanism and cubosome interaction with human cells and bacteria are still poorly understood. Herein, we reveal how cubosomes loaded with the human cathelicidin antimicrobial peptide LL-37, a system with high bacteria-killing effect, interact with the bacterial membrane and provide new insights into the eradication mechanism. Combining the advanced experimental techniques neutron reflectivity and quartz crystal microbalance with dissipation monitoring, a mechanistic drug delivery model for LL-37-loaded cubosomes on bacterial mimicking bilayers was constructed. Moreover, the cubosome interaction with Escherichia coli was directly visualized using super-resolution laser scanning microscopy and cryogenic electron tomography. We could conclude that cubosomes loaded with LL-37 adsorbed and distorted bacterial membranes, providing evidence that the peptide-loaded cubosomes function as an antimicrobial unit.

OriginalsprogEngelsk
TidsskriftA C S Applied Materials and Interfaces
Vol/bind11
Udgave nummer24
Sider (fra-til)21314-21322
Antal sider9
ISSN1944-8244
DOI
StatusUdgivet - 23 maj 2019

ID: 224284175