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Light micrographs of PAS staining of rat kidney tissue. Control (a), AlCl3-treated group (b) and Fenugreek + AlCl3-treated group (c). (a) normal cross-section through the convoluted tubules of the cortex. (b) decrease in the brush border density which disappeared in some points leading to a swelling aspect of the proximal tubules (solid arrow) and discontinuity in tubules basement membrane (dotted arrow). (c) a clear restitution of the brush border density as well as the continuity of tubules basement membrane. (×1000)