Antibacterial and transfection activities of nebulized formulations incorporating long n-alkyl chain silver N-heterocyclic carbene complexes

Angélique Mottais 1 Mathieu Berchel 2 Tony Le Gall 1 Yann Sibiril 1 Frédérique d'Arbonneau 1 Véronique Laurent 1 Paul-Alain Jaffres 2 Tristan Montier 1
1 GGB - Génétique, génomique fonctionnelle et biotechnologies (UMR 1078)
2 CEMCA - Chimie, Electrochimie Moléculaires et Chimie Analytique
Abstract : The development of new antibacterial molecules is essential in view of the emergence of pathogenic strains resistant to multiple antibiotics. Among the infectious pathologies, pulmonary infections are particularly difficult to treat due to the complexity of lung anatomy and the presence of natural barriers such as mucus. At present, the aerosol delivery of antibacterial compounds is still poorly employed. Furthermore, the presence of bacteria in lungs negatively affects aerosolized Cystic Fibrosis gene therapy efficiency. A multi-functional formulation (antibacterial and transfection activities) could increase the therapeutic effect. This work reports the synthesis of new N-heterocyclic carbene silver complexes (Ag-NHC) featuring a lipid chain and the evaluation of their antibacterial potency, especially when delivered following aerosolization. When formulated alone in water, these Ag-NHC displayed remarkable antibacterial activities against some Staphyloccocus aureus strains and Pseudomonas aeruginosa clinical strains. Moreover, combined with cationic lipid and DNA (ternary combination), they could be used to deliver therapeutic genes via aerosolization in infected lungs. Altogether, the data reported herein support n-alkyl chain Ag-NHC as a possible alternative to conventional antibiotics for treating respiratory infections and to combat the emergence of multi-resistant bacteria.
Keywords : Silver N-heterocyclic carbene Lung therapy Antibacterial activity Aerosolization Synthetic vector
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Journal articles
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https://hal.univ-brest.fr/hal-02302023
Contributor : Nicolas Renard <>
Submitted on : Tuesday, October 1, 2019 - 8:31:35 AM
Last modification on : Wednesday, October 2, 2019 - 1:26:21 AM

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Angélique Mottais, Mathieu Berchel, Tony Le Gall, Yann Sibiril, Frédérique d'Arbonneau, et al.. Antibacterial and transfection activities of nebulized formulations incorporating long n-alkyl chain silver N-heterocyclic carbene complexes. International Journal of Pharmaceutics, Elsevier, 2019, 567, pp.118500. ⟨10.1016/j.ijpharm.2019.118500⟩. ⟨hal-02302023⟩

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