AQUAPORINS CAN BE INVOLVED IN THE SWELLING CAUSED BY SHIGA TOXIN TYPE 2 ON HGEC AND HK-2 CELLS

GOMEZ FERNANDO; REPETTI, JULIETA; ROMERO, ROMINA; SACERDOTI FLAVIA; IBARRA, CRISTINA; AMARAL MARÍA M

Modalidad Virtual

Congreso; Reunión de Sociedades de Biociencias 2021; 2021

SAIC. SAI. AAFE. NANOMED

Hemolytic uremic syndrome related to Shiga toxin?producing Escherichiacoli (STEC-HUS) is the principal etiology of acute kidney injuryin children in Argentina.Previously, we demonstrated that Shiga toxin type 2 (Stx2) damageshuman glomerular endothelial cells (HGEC) and HK-2 human proximaltubular epithelial cell line by inducing swelling and detachment.In this work, we analyzed cell volume changes of HGEC and HK-2exposed or not to Stx2 or a hypoosmotic (HYPO) medium, in thepresence or not of aquaporins (AQPs) inhibitors (mercuric chloride:HgCl2 and tetraethylammonium: TEA), or an inhibitor of Stx2 receptor(Gb3) synthesis, Eliglustat (EG). For controls, an isosmotic (ISO)medium was used.Cells were grown on 12 well plates and pretreated for 30 minuteswith HgCl2 (10 μM) or TEA (100 μM) or pretreated during 24 h withEG (10 μM). Then, HGEC and HK-2 were incubated with Stx2 (50μM) for an additional 40 minutes. Cell volume was analyzed by lightmicroscopy and measuring cell area by using Image J software.After Stx2 and HYPO medium treatments, a significant increase inthe cell volume of HGEC (Stx2: 42%; HYPO: 36%, n= 3, p