Effects of KA on angiogenesis in rat aortic ring assay. Effect of KA on microvessels formation in rat aortic rings. Explants treated with (A) 1% ethanol (B) 10 μg/ml (C) 40 μg/ml and (D) 100 μg/ml suramin as a positive control (4X). (E) The Dose response relationship of KA on rat aorta assay. Data was represented as mean ± SD (n = 3). *P < 0.05 and ***P < 0.001.