Université de Fribourg

CD47 promotes age-associated deterioration in angiogenesis, blood flow and glucose homeostasis

Ghimire, Kedar ; Li, Yao ; Chiba, Takuto ; Julovi, Sohel M. ; Li, Jennifer ; Ross, Mark A. ; Straub, Adam C. ; O’Connell, Philip J. ; Rüegg, Curzio ; Pagano, Patrick J. ; Isenberg, Jeffrey S. ; Rogers, Natasha M.

In: Cells, 2020, vol. 9, no. 7, p. 1695

The aged population is currently at its highest level in human history and is expected to increase further in the coming years. In humans, aging is accompanied by impaired angiogenesis, diminished blood flow and altered metabolism, among others. A cellular mechanism that impinges upon these manifestations of aging can be a suitable target for therapeutic intervention. Here we identify cell...

Université de Fribourg

MAGI1 mediates eNOS activation and NO production in endothelial cells in response to fluid shear stress

Ghimire, Kedar ; Zaric, Jelena ; Alday-Parejo, Begoña ; Seebach, Jochen ; Bousquenaud, Mélanie ; Stalin, Jimmy ; Bieler, Grégory ; Schnittler, Hans-Joachim ; Rüegg, Curzio

In: Cells, 2019, vol. 8, no. 5, p. 388

Fluid shear stress stimulates endothelial nitric oxide synthase (eNOS) activation and nitric oxide (NO) production through multiple kinases, including protein kinase A (PKA), AMP-activated protein kinase (AMPK), AKT and Ca2+/calmodulin-dependent protein kinase II (CaMKII). Membrane-associated guanylate kinase (MAGUK) with inverted domain structure-1 (MAGI1) is an adaptor protein that...

Université de Fribourg

Computational modeling of shear forces and experimental validation of endothelial cell responses in an orbital well shaker system

Filipovic, Nenad ; Ghimire, Kedar ; Saveljic, Igor ; Milosevic, Zarko ; Rüegg, Curzio

In: Computer Methods in Biomechanics and Biomedical Engineering, 2016, vol. 19, no. 6, p. 581–590

Vascular endothelial cells are continuously exposed to hemodynamic shear stress. Intensity and type of shear stress are highly relevant to vascular physiology and pathology. Here, we modeled shear stress distribution in a tissue culture well (R = 17.5 mm, fill volume 2 ml) under orbital translation using computational fluid dynamics with the finite element method. Free surface distribution,...