Previously reported protocols were applied (5 (link), 6 (link)). To identify podocytes, we used a combination of WT1 (Agilent Technologies; IS05530-2) and DACH1 (Sigma-Aldrich; HPA012672) (32 (link)) as primary antibodies; Alexa-Fluor 488, -555, and/or -647 as secondary antibodies (Invitrogen; A21202, A31572, A31571, and A31573, respectively) depending on the experiment; and a DNA marker to identify single nuclei — either DAPI (Sigma-Aldrich; D9542) or DRAQ5 (Abcam; ab108410). Optical images were obtained using inverted laser confocal microscopes (Nikon and LSM800, Zeiss), stored in 1024 × 1024 pixel frames. Each image contained 1 glomerulus.
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