Kidney GlomerulusGlomerulonephritisGlomerular MesangiumPodocytesNephrosclerosisNephritisProteinuriaGlomerulonephritis, MembranoproliferativeMesangial CellsGlomerulosclerosis, Focal SegmentalKidneyDiabetic NephropathiesAntigens, Thy-1Kidney TubulesNephrosis, LipoidRats, Sprague-DawleyCells, CulturedCell DivisionKidney DiseasesCell CountFluorescent Antibody TechniqueImmunohistochemistryProliferating Cell Nuclear AntigenNephrectomyDiabetes Mellitus, ExperimentalRNA, MessengerRats, WistarBasement MembraneEpitheliumAlbuminuriaApoptosisMacrophagesTransforming Growth Factor betaIn Situ HybridizationGene ExpressionMicroscopy, ElectronCollagenImmunoglobulin GRats, Inbred StrainsEpithelial CellsDisease Models, AnimalBlotting, WesternMice, Inbred C57BL