Renal histopathology in control, diabetic and treated diabetic rats.

<p>Aldosterone antagonists were the most effective in attenuating the structural lesions of DN. Representative PAS staining of kidney sections (40x magnification; scale bar –50 μm): non-diabetic control (A), STZ-induced diabetic (B), Enalapril (E), Losartan (F), Spironolactone (G) and Eplerenone (H) treated diabetic rats (n = 8–10/group). Long, wide headed arrows point on mesangial matrix; long, narrow headed arrows on arterioles. Armanni-Ebstein lesions are marked with short, wide headed arrows. <i>C</i>: Mesangial fractional volume values (Vv) are defined by the ratio of mesangial area/glomerular tuft area. The mesangial area is determined by assessment of PAS-positive and nucleus-free areas in the mesangium. *p<0.05 <i>vs</i> Control; §p<0.05 <i>vs</i> Diabetes, respectively; (bars show means ± SD). <i>D</i>: Arteriolar hyalinosis is defined by the average of hyalinized quarters of arterioles. The hyalin is determined by assessment of PAS-positive and nucleus-free areas within the arterioles. *p<0.05 <i>vs</i> Control; §p<0.05 <i>vs</i> Diabetes, respectively; (bars show means ± SD).