They, however, ignore alterations in tubular function although the morphological hallmark of acute renal failure in general and CIN in particular are tubular alterations such as tubular necrosis and tubular dilatation [33], Vitamin-D-binding protein is filtered through the glomerulus as a 25-(OH) vitamin D 3/VDBP complex and is uptaken by megalin receptors in the brush border of proximal tubule cells [9,11]. Here, GC is linked to acute kidney injury.