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Université de Fribourg

Gene expression analysis in the mouse brainstem identifies Cart and Nesfatin as neuropeptides coexpressed in the Calbindin-positive neurons of the Nucleus papilio

Girard, Franck ; von Siebenthal, Michelle ; Davis, Fred P. ; Celio, Marco R.

In: Sleep, 2020, vol. 43, no. 2020-11, p. zsaa085

Study Objectives: The brainstem contains several neuronal populations, heterogeneous in terms of neurotransmitter/neuropeptide content, which are important for controlling various aspects of the rapid eye movement (REM) phase of sleep. Among these populations are the Calbindin (Calb)-immunoreactive NPCalb neurons, located in the Nucleus papilio, within the dorsal paragigantocellular nucleus...

Université de Fribourg

Inhibition of p38mapk reduces adipose tissue inflammation in aging mediated by arginase-II

Huang, Ji ; Liu, Chang ; Ming, Xiu-Fen ; Yang, Zhihong

In: Pharmacology, 2020, vol. 105, no. 9–10, p. 491–504

Background: Adipose tissue inflammation occurs not only in obesity but also in aging and is mechanistically linked with age-associated diseases. Studies show that ablation of the l-arginine-metabolizing enzyme arginase-II (Arg-II) reduces adipose tissue inflammation and improves glucose tolerance in obesity. However, the role of Arg-II in aging adipose tissue inflammation is not clear....

Université de Fribourg

Mechanism of cystathionine-β-synthase inhibition by disulfiram : The role of bis(N,N-diethyldithiocarbamate)-copper(II)

Zuhra, Karim ; Panagaki, Theodora ; B.Randi, Elisa ; Augsburger, Fiona ; Blondel, Marc ; Friocourt, Gaelle ; Herault, Yann ; Szabo, Csaba

In: Biochemical Pharmacology, 2020, vol. 182, p. 114267

Background: Hydrogen sulfide (H2S) is an endogenous mammalian gasotransmitter. Cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE) and 3- mercaptopyruvate sulfurtransferase (3-MST) are the principal enzymes responsible for its biogenesis. A recent yeast screen suggested that disulfiram (a well-known inhibitor of aldehyde dehydrogenase and a clinically used drug in the treatment of...

Université de Fribourg

Meta-analysis of metabolites involved in bioenergetic pathways reveals a pseudohypoxic state in Down syndrome

Pecze, Laszlo ; Randi, Elisa B. ; Szabo, Csaba

In: Molecular Medicine, 2020, vol. 26, no. 1, p. 102

Clinical observations and preclinical studies both suggest that Down syndrome (DS) may be associated with significant metabolic and bioenergetic alterations. However, the relevant scientific literature has not yet been systematically reviewed. The aim of the current study was to conduct a meta-analysis of metabolites involved in bioenergetics pathways in DS to conclusively determine the...

Université de Fribourg

Effects of the poly(ADP-ribose) polymerase inhibitor olaparib in cerulein-induced pancreatitis

Ahmad, Akbar ; Haas De Mello, Aline ; Szczesny, Bartosz ; Törö, Gábor ; Marcatti, Michela ; Druzhyna, Nadiya ; Liaudet, Lucas ; Tarantini, Stefano ; Salomao, Reinaldo ; Garcia Soriano, Francisco ; Szabo, Csaba

In: Shock, 2020, vol. 53, no. 5, p. 653–665

Objective: Activation of the constitutive nuclear and mitochondrial enzyme poly (ADP- ribose) polymerase (PARP) has been implicated in the pathogenesis of cell dysfunction, inflammation, and organ failure in various forms of critical illness. The objective of our study was to evaluate the efficacy and safety of the clinically approved PARP inhibitor olaparib in an experimental model of...

Université de Fribourg

Bacterial oxidases of the cytochrome bd family : redox enzymes of unique structure, function, and utility as drug targets

Borisov, Vitaliy B. ; Siletsky, Sergey A. ; Paiardini, Alessandro ; Hoogewijs, David ; Forte, Elena ; Giuffrè, Alessandro ; Poole, Robert K.

In: Antioxidants & Redox Signaling, 2021, vol. 34, no. 16, p. 1280-1318

Significance: Cytochrome bd is a ubiquinol:oxygen oxidoreductase of many prokaryotic respiratory chains with a unique structure and functional characteristics. Its primary role is to couple the reduction of molecular oxygen, even at submicromolar concentrations, to water with the generation of a proton motive force used for adenosine triphosphate production. Cytochrome bd is found in many ...

Université de Fribourg

Ranking alien species based on their risks of causing environmental impacts : A global assessment of alien ungulates

Volery, Lara ; Jatavallabhula, Divija ; Scillitani, Laura ; Bertolino, Sandro ; Bacher, Sven

In: Global Change Biology, 2021, vol. 27, no. 5, p. 1003-1016

For an efficient allocation of the limited resources to alien species management, the most damaging species should be prioritized. Comparing alien species based on their impacts is not straightforward, as the same species can cause different types and magnitudes of impacts when introduced to different contexts, making it difficult to summarize its overall impact. The Environmental Impact...

Université de Fribourg

Innovative preclinical models for pulmonary drug delivery research

Ehrmann, Stephan ; Schmid, Otmar ; Darquenne, Chantal ; Rothen-Rutishauser, Barbara ; Sznitman, Josue ; Yang, Lin ; Barosova, Hana ; Vecellio, Laurent ; Mitchell, Jolyon ; Heuze-Vourc’h, Nathalie

In: Expert Opinion on Drug Delivery, 2020, vol. 17, no. 4, p. 463–478

Introduction: Pulmonary drug delivery is a complex field of research combining physics which drive aerosol transport and deposition and biology which underpins efficacy and toxicity of inhaled drugs. A myriad of preclinical methods, ranging from in- silico to in-vitro, ex–vivo and in-vivo, can be implemented.Areas covered: The present review covers in-silico mathematical and computational...

Université de Fribourg

Silica nanoparticles enhance disease resistance in Arabidopsis plants

El-Shetehy, Mohamed ; Moradi, Aboubakr ; Maceroni, Mattia ; Reinhardt, Didier ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara ; Mauch, Felix ; Schwab, Fabienne

In: Nature Nanotechnology, 2020, p. 1–10

In plants, pathogen attack can induce an immune response known as systemic acquired resistance that protects against a broad spectrum of pathogens. In the search for safer agrochemicals, silica nanoparticles (SiO2 NPs; food additive E551) have recently been proposed as a new tool. However, initial results are controversial, and the molecular mechanisms of SiO2 NP-induced disease resistance...

Université de Fribourg

Patient-derived and artificial ascites have minor effects on MeT-5A mesothelial cells and do not facilitate ovarian cancer cell adhesion

Estermann, Manuela ; Huang, Yen-Lin ; Septiadi, Dedy ; Ritz, Danilo ; Liang, Ching-Yeu ; Jacob, Francis ; Drasler, Barbara ; Petri-Fink, Alke ; Heinzelmann-Schwarz, Viola ; Rothen-Rutishauser, Barbara

In: PLOS ONE, 2020, vol. 15, no. 12, p. e0241500

The presence of ascites in the peritoneal cavity leads to morphological and functional changes of the peritoneal mesothelial cell layer. Cells loose cell-cell interactions, rearrange their cytoskeleton, activate the production of fibronectin, and change their cell surface morphology in a proinflammatory environment. Moreover, ovarian cancer cell adhesion has been shown to be facilitated by...