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Université de Fribourg

Photochemical methods in metathesis reactions

Harvey, Freya M. ; Bochet, Christian G.

In: Organic & Biomolecular Chemistry, 2020, vol. 18, no. 40, p. 8034–8057

Metathesis reactions are one of the most reliable and prevalent ways of creating a C– C bond in synthesis. Photochemical variants exist, and they have proven extremely useful for the construction of complex molecules, from natural products to Möbius rings. A variety of starting materials can undergo photometathesis reactions, including alkenes, alkynes, carbonyls, thiocarbonyls, and...

Université de Fribourg

From zero to six double bonds: phospholipid unsaturation and organelle function

Antonny, Bruno ; Vanni, Stefano ; Shindou, Hideo ; Thierry, Ferreira

In: Trends in Cell Biology, 2015, vol. 25, no. 7, p. 427–436

Cellular phospholipids (PLs) differ by the nature of their polar heads as well as by the length and unsaturation level of their fatty acyl chains. We discuss how the ratio between saturated, monounsaturated, and polyunsaturated PLs impacts on the functions of such organelles as the endoplasmic reticulum, synaptic vesicles, and photoreceptor discs. Recent experiments and simulations suggest...

Université de Fribourg

Human microglia respond to malaria-induced extracellular vesicles

Mbagwu, Smart Ikechukwu ; Lannes, Nils ; Walch, Michael ; Filgueira, Luis ; Mantel, Pierre-Yves

In: Pathogens, 2020, vol. 9, no. 1, p. 21

Microglia are the chief immune cells of the brain and have been reported to be activated in severe malaria. Their activation may drive towards neuroinflammation in cerebral malaria. Malaria-infected red blood cell derived-extracellular vesicles (MiREVs) are produced during the blood stage of malaria infection. They mediate intercellular communication and immune regulation, among other...

Université de Fribourg

Artificial phospholipids and their vesicles

Zumbuehl, Andreas

In: Langmuir, 2019, vol. 35, no. 32, p. 10223–10232

Phospholipids are at the heart and origin of life on this planet. The possibilities in terms of phospholipid self-assembly and biological functions seem limitless. Nonetheless, nature exploits only a small fraction of the available chemical space of phospholipids. Using chemical synthesis, artificial phospholipid structures become accessible, and the study of their biophysics may reveal...

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

Secretome of adipose-derived mesenchymal stem cells promotes skeletal muscle regeneration through synergistic action of extracellular vesicle cargo and soluble proteins

Mitchell, Robert ; Mellows, Ben ; Sheard, Jonathan ; Antonioli, Manuela ; Kretz, Oliver ; Chambers, David ; Zeuner, Marie-Theres ; Tomkins, James E. ; Denecke, Bernd ; Musante, Luca ; Joch, Barbara ; Debacq-Chainiaux, Florence ; Holthofer, Harry ; Ray, Steve ; Huber, Tobias B. ; Dengjel, Jörn ; De Coppi, Paolo ; Widera, Darius ; Patel, Ketan

In: Stem Cell Research & Therapy, 2019, vol. 10, no. 1, p. 116

The mechanisms underpinning the regenerative capabilities of mesenchymal stem cells (MSC) were originally thought to reside in their ability to recognise damaged tissue and to differentiate into specific cell types that would replace defective cells. However, recent work has shown that molecules produced by MSCs (secretome), particularly those packaged in extracellular vesicles (EVs), rather...

Université de Fribourg

A Comparison of Approaches for Visualizing Blockchains and Smart Contracts

Härer, Felix ; Fill, Hans-Georg

In: Jusletter IT, 2019, p. -

The use of blockchains and smart contracts is currently explored in various fields of science and engineering due to their potential of radically changing the ways of doing business and the assumed elimination of traditional legal entities. Thereby, the complexity of the underlying technical relationships and mechanisms typically hampers the understanding by non-technical experts. In this...

Université de Fribourg

Evaluation of extracellular vesicle function during malaria infection

Andrea Hernández-Castañeda, María ; Mbagwu, Smart Ikechukwu ; Babatunde, Kehinde Adebayo ; Walch, Michael ; Filgueira, Luis ; Mantel, Pierre-Yves

In: JoVE (Journal of Visualized Experiments), 2018, no. 132, p. e57067

Malaria is a life-threatening disease caused by Plasmodium parasites, with P. falciparum being the most prevalent on the African continent and responsible for most malaria-related deaths globally. Several factors including parasite sequestration in tissues, vascular dysfunction, and inflammatory responses influence the evolution of the disease in malaria-infected people. P. falciparum-infected...

Consortium of Swiss Academic Libraries

Surfactant Assemblies and their Various Possible Roles for the Origin(S) of Life

Walde, Peter

In: Origins of Life and Evolution of Biospheres, 2006, vol. 36, no. 2, p. 109-150