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Université de Fribourg

Albumin evokes Ca 2+ -induced cell oxidative stress and apoptosis through TRPM2 channel in renal collecting duct cells reduced by curcumin

Nazıroğlu, Mustafa ; Çiğ, Bilal ; Yazğan, Yener ; Schwaerzer, Gerburg K. ; Theilig, Franziska ; Pecze, László

In: Scientific Reports, 2019, vol. 9, no. 1, p. 1–16

In proteinuric nephropathies of chronic kidney disease, the epithelial cells of the nephron including the collecting duct are exposed to high concentrations of luminal albumin. Albumin is taken up from collecting duct cells by endocytosis causing excessive reactive oxygen species (ROS) production and a proinflammatory response. Curcumin used in the traditional medicine possesses...

Université de Fribourg

Retromer and TBC1D5 maintain late endosomal RAB7 domains to enable amino acid–induced mTORC1 signaling

Kvainickas, Arunas ; Nägele, Heike ; Qi, Wenjing ; Dokládal, Ladislav ; Jimenez-Orgaz, Ana ; Stehl, Luca ; Gangurde, Dipak ; Zhao, Qian ; Hu, Zehan ; Dengjel, Jörn ; Virgilio, Claudio De ; Baumeister, Ralf ; Steinberg, Florian

In: The Journal of Cell Biology, 2019, vol. 218, no. 9, p. 3019–3038

Retromer is an evolutionarily conserved multiprotein complex that orchestrates the endocytic recycling of integral membrane proteins. Here, we demonstrate that retromer is also required to maintain lysosomal amino acid signaling through mTORC1 across species. Without retromer, amino acids no longer stimulate mTORC1 translocation to the lysosomal membrane, which leads to a loss of mTORC1...

Università della Svizzera italiana

The atypical receptor CCRL2 (C-C Chemokine Receptor-Like 2) does not act as a decoy receptor in endothelial cells

Mazzotti, Chiara ; Gagliostro, Vincenzo ; Bosisio, Daniela ; Del Prete, Annalisa ; Tiberio, Laura ; Thelen, Marcus ; Sozzani, Silvano

In: Frontiers in immunology, 2017, vol. 8, p. 1233

C-C chemokine receptor-like 2 (CCRL2) is a non-signaling seven-transmembrane domain (7-TMD) receptor related to the atypical chemokine receptor (ACKR) family. ACKRs bind chemokines but do not activate G protein-dependent signaling or cell functions. ACKRs were shown to regulate immune functions in vivo by their ability to scavenge chemokines from the local environment. This study was ...