Université de Fribourg

Silver-containing titanium dioxide nanocapsules for combating multidrug-resistant bacteria

Hérault, Nelly ; Wagner, Julia ; Abram, Sarah-Luise ; Widmer, Jérôme ; Horvath, Lenke ; Vanhecke, Dimitri ; Bourquin, Carole ; Fromm, Katharina M

In: International Journal of Nanomedicine, 2020, vol. Volume 15, p. 1267–1281

Background: Joint arthroplasty has improved the quality of life of patients worldwide, but infections of the prosthesis are frequent and cause significant morbidity. Antimicrobial coatings for implants promise to prevent these infections. Methods: We have synthesized nanocapsules of titanium dioxide in amorphous or anatase form containing silver as antibacterial agent and tested their impact ...

Université de Fribourg

Development of resiquimod-loaded modified PLA-based nanoparticles for cancer immunotherapy: A kinetic study

Thauvin, Cédric ; Widmer, Jérôme ; Mottas, Inès ; Hocevar, Sandra ; Allémann, Eric ; Bourquin, Carole ; Delie, Florence

In: European Journal of Pharmaceutics and Biopharmaceutics, 2019, vol. 139, p. 253–261

Resiquimod (R848), a member of the imidazoquinoline family, is a Toll-like receptor 7/8 agonist with high potency for cancer immunotherapy. However, tolerance induction and adverse effects limit its development as a drug. Encapsulation in a polymer matrix can circumvent these limitations, as shown in our formerly published approach where R848 was loaded into polylactic acid (PLA)-based...

Université de Fribourg

Polymer-based nanoparticles loaded with a TLR7 ligand to target the lymph node for immunostimulation

Widmer, Jérôme ; Thauvin, Cédric ; Mottasa, Inès ; Nguyen, Van Nga ; Delie, Florence ; Allémann, Eric ; Bourquin, Carole

In: International Journal of Pharmaceutics, 2018, vol. 535, no. 1, p. 444–451

Small-molecule agonists for the Toll-like receptors (TLR) 7 and 8 are effective for the immunotherapy of skin cancer when used as topical agents. Their systemic use has however been largely unsuccessful due to dose-limiting toxicity. We propose a polymer-based nanodelivery system to target resiquimod, a TLR7 ligand, to the lymph node in order to focus the immunostimulatory activity and to...

Université de Fribourg

Antimicrobial silver-filled silica nanorattles with low immunotoxicity in dendritic cells

Priebe, Magdalena ; Widmer, Jérôme ; Löwa, Nina Suhartha ; Abram, Sarah-Luise ; Mottas, Inès ; Woischnig, Anne-Kathrin ; Brunetto, Priscilla S. ; Khanna, Nina ; Bourquin, Carole ; Fromm, Katharina M.

In: Nanomedicine: Nanotechnology, Biology and Medicine, 2017, vol. 13, no. 1, p. 11–22

The progression in the use of orthopedic implants has led to an increase in the absolute number of implant infections, triggering a search for more effective antibacterial coatings. Nanorattles have recently gained interest in biomedical applications such as drug delivery, as encapsulation of the cargo inside the hollow structure provides a physical protection from the surrounding...