Université de Fribourg

Improvement of DNA vector delivery of DOTAP lipoplexes by short-chain aminolipids

Buck, Jonas ; Mueller, Dennis ; Mettal, Ute ; Ackermann, Miriam ; Grisch-Chan, Hiu Man ; Thöny, Beat ; Zumbuehl, Andreas ; Huwyler, Jörg ; Witzigmann, Dominik

In: ACS Omega, 2020, vol. 5, no. 38, p. 24724–24732

Cellular delivery of DNA vectors for the expression of therapeutic proteins is a promising approach to treat monogenic disorders or cancer. Significant efforts in a preclinical and clinical setting have been made to develop potent nonviral gene delivery systems based on lipoplexes composed of permanently cationic lipids. However, transfection efficiency and tolerability of such systems are in...

Université de Fribourg

Facile and rapid formation of giant vesicles from glass beads

Tanasescu, Radu ; Mettal, Ute ; Colom, Adai ; Roux, Aurélien ; Zumbuehl, Andreas

In: Polymers, 2018, vol. 10, no. 1, p. 54

Giant vesicles (GVs) are widely-used model systems for biological membranes. The formulation of these vesicles, however, can be problematic and artifacts, such as degraded molecules or left-over oil, may be present in the final liposomes. The rapid formulation of a high number of artifact-free vesicles of uniform size using standard laboratory equipment is, therefore, highly desirable. Here,...

Université de Fribourg

Immunological response to nitroglycerin-loaded shear-responsive liposomes in vitro and in vivo

Buscema, Marzia ; Matviykiv, Sofiya ; Mészáros, Tamás ; Gerganova, Gabriela ; Weinberger, Andreas ; Mettal, Ute ; Mueller, Dennis ; Neuhaus, Frederik ; Stalder, Etienne ; Ishikawa, Takashi ; Urbanics, Rudolf ; Saxer, Till ; Pfohl, Thomas ; Szebeni, János ; Zumbuehl, Andreas ; Müller, Bert

In: Journal of Controlled Release, 2017, vol. 264, no. Supplement C, p. 14–23

Liposomes formulated from the 1,3-diamidophospholipid Pad-PC-Pad are shear- responsive and thus promising nano-containers to specifically release a vasodilator at stenotic arteries. The recommended preclinical safety tests for therapeutic liposomes of nanometer size include the in vitro assessment of complement activation and the evaluation of the associated risk of complement...