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The mechanisms by which Shaoyao-Gancao decoction (SGD) inhibits the production of inflammatory cytokines in serum and brain tissue after cerebral ischemia-reperfusion (CI-RP) in rats were investigated. A right middle cerebral artery occlusion was used to induce CI-RP after which the rats were divided into model ( n  = 39), SGD ( n  = 28), clopidogrel ( n  = 25) and sham operated ( n  = 34) groups. The Bederson scale was used to evaluate changes in behavioral indices. The levels of IL-1 β , TNF- α , MCP-1, IL-10, RANTES, VEGF, and TGF- β 1 in the serum and infarcted brain tissues were measured. Nissl body and immunohistochemical staining methods were used to detect biochemical changes in neurons, microglial cells, and astrocytes. Serum levels of VEGF, TNF- α , MCP-1, IL-1 β , and IL-10 increased significantly 24 h after CI-RP. In brain tissue, levels of TNF- α  and IL-1 β  significantly increased 24 h after CI-RP, whereas levels of TGF- β 1 and MCP-1 were significantly higher 96 h after CI-RP ( P  < 0.05). SGD or clopidogrel after CI-RP reduced TNF- α  and IL-1 β  levels in brain tissue and serum levels of MCP-1, IL-1 β , and IL-10. SGD increased the number of NeuN-positive cells in infarcted brain tissue and reduced the number of IBA1-positive and GFAP-positive cells. The efficacy of SGD was significantly higher than that of clopidogrel.

biomed research international

Effects of Shaoyao-Gancao Decoction on Infarcted Cerebral Cortical Neurons: Suppression of the Inflammatory Response following Cerebral Ischemia-Reperfusion in a Rat Model