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Associations between atherosclerosis and Porphyromonas gingivalis, a major periodontopathogen, have been indicated. The
aim of the present study was to examine the histological and antioxidant effects of Andrographolide on induced atherosclerosis
by Porphyromonas gingivalis. Atherogenesis was examined in male Sprague Dawley (SD) rat, which were divided into five
groups six rats for each. Normal control (A) and experimental groups (B, C, D and E) were challenged orally with P. gingivalis
ATCC 33277 (0.2 mL of 1.5 X 10x12 bacterial cells/mL in 2% CMC with PBS) five times a week for one month. Group (C)
received orally treatment with simvastatin 100 mg/kg, while groups (D and E) received orally treatment with Andrographolide 20
mg/kg and 10 mg/kg respectively for one month. Animals scarified and sections of the aortic, heart, liver and kidney were made at
a thickness of 5μl stained with (H & E), and assessed for histopathological changes. Homogenate prepared from the heart and
aortic to evaluate the enzymatic activity of SOD and GSH. Histological examination (H&E) of group (B) aorta sections showed a
miner thickening in intimal of the aorta, while treated groups with Andrographolide (D and E) showed no changes in intimal of the
aorta. On other hand, histological evaluation of liver, kidney and heart tissues showed no damage or abnormality among groups.
Andrographolide significantly improved the enzymatic activity of SOD and GSH in heart and aortic tissue homogenate of group
(D and E) and that could be due to the anti-oxidants properties of Andrographolide. Conclusion: Based on these results we can say
that Andrographolide could be a good herbal agent in the treatment of atherosclerosis.