Université de Fribourg

Arp3 controls the podocyte architecture at the kidney filtration barrier

Schell, Christoph ; Sabass, Benedikt ; Helmstaedter, Martin ; Geist, Felix ; Abed, Ahmed ; Yasuda-Yamahara, Mako ; Sigle, August ; Maier, Jasmin I. ; Grahammer, Florian ; Siegerist, Florian ; Artelt, Nadine ; Endlich, Nicole ; Kerjaschki, Dontscho ; Arnold, Hans-Henning ; Dengjel, Jörn ; Rogg, Manuel ; Huber, Tobias B.

In: Developmental Cell, 2018, vol. 47, no. 6, p. 741-757.e8

Podocytes, highly specialized epithelial cells, build the outer part of the kidney filtration barrier and withstand high mechanical forces through a complex network of cellular protrusions. Here, we show that Arp2/3-dependent actin polymerization controls actomyosin contractility and focal adhesion maturation of podocyte protrusions and thereby regulates formation, maintenance, and capacity...

Université de Fribourg

The FERM protein EPB41L5 regulates actomyosin contractility and focal adhesion formation to maintain the kidney filtration barrier

Schell, Christoph ; Rogg, Manuel ; Suhm, Martina ; Helmstädter, Martin ; Sellung, Dominik ; Yasuda-Yamahara, Mako ; Kretz, Oliver ; Küttner, Victoria ; Suleiman, Hani ; Kollipara, Laxmikanth ; Zahedi, René P. ; Sickmann, Albert ; Eimer, Stefan ; Shaw, Andrey S. ; Kramer-Zucker, Albrecht ; Hirano-Kobayashi, Mariko ; Abe, Takaya ; Aizawa, Shinichi ; Grahammer, Florian ; Hartleben, Björn ; Dengjel, Jörn ; Huber, Tobias B.

In: Proceedings of the National Academy of Sciences, 2017, vol. 114, no. 23, p. E4621–E4630

Podocytes form the outer part of the glomerular filter, where they have to withstand enormous transcapillary filtration forces driving glomerular filtration. Detachment of podocytes from the glomerular basement membrane precedes most glomerular diseases. However, little is known about the regulation of podocyte adhesion in vivo. Thus, we systematically screened for podocyte-specific focal...