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Diabetic nephropathy: mechanisms of renal disease progression Kanwar YS; Wada J; Sun L; Xie P; Wallner EI; Chen S; Chugh S; Danesh FRExp Biol Med (Maywood) 2008[Jan]; 233 (1): 4-11Diabetic nephropathy is characterized by excessive amassing of extracellular matrix (ECM) with thickening of glomerular and tubular basement membranes and increased amount of mesangial matrix, which ultimately progress to glomerulosclerosis and tubulo-interstitial fibrosis. In view of this outcome, it would mean that all the kidney cellular elements, i.e., glomerular endothelia, mesangial cells, podocytes, and tubular epithelia, are targets of hyperglycemic injury. Conceivably, high glucose activates various pathways via similar mechanisms in different cell types of the kidney except for minor exceptions that are related to the selective expression of a given molecule in a particular renal compartment. To begin with, there is an obligatory excessive channeling of glucose intermediaries into various metabolic pathways with generation of advanced glycation products (AGEs), activation of protein kinase C (PKC), increased expression of transforming growth factor-beta (TGF-beta), GTP-binding proteins, and generation of reactive oxygen species (ROS). The ROS seem to be the common denominator in various pathways and are central to the pathogenesis of hyperglycemic injury. In addition, there are marked alterations in intraglomerular hemodynamics, i.e., hyperfiltration, and this along with metabolic derangements adversely compounds the hyperglycemia-induced injury. Here, the information compiled under various subtitles of this article is derived from an enormous amount of data summarized in several excellent literature reviews, and thus their further reading is suggested to gain in-depth knowledge of each of the subject matter.|Cell Cycle Proteins/metabolism[MESH]|Diabetic Nephropathies/complications/*etiology/metabolism[MESH]|Disease Progression[MESH]|Enzyme Activation[MESH]|GTP-Binding Proteins/metabolism[MESH]|Glucose/metabolism[MESH]|Glycation End Products, Advanced/metabolism[MESH]|Hypertension/complications[MESH]|Kidney/*metabolism[MESH]|Protein Kinase C/metabolism[MESH]|Reactive Oxygen Species/metabolism[MESH]|Signal Transduction[MESH]|Transforming Growth Factor beta/metabolism[MESH] |
