Abstract
"Tianma" (Gastrodia) and "gouteng" (Uncaria) are both widely used to treat cerebral ischemia. At the same time, "ezhu" (Curcuma longa) or turmeric, is derived from the dried roots of C. longa. It is a polyphenol known for its anti-inflammatory effects and its promotion of blood vessel endothelial function. This study explored the neuroprotective effects of a water extract of "tianma", "gouteng", and "ezhu" against ischemic injury. Flow cytometry analysis showed that Gastrodia, Uncaria, and Curcuma reduced the proportion of apoptotic cells in CoCl2 induced B35 (P = 0.0027) and SH-SY5Y (P = 0.0006) cell sample relative to the respective control group. Western blot indicated that Gastrodia, Uncaria, and Curcuma upregulated the expression of Bcl-2 and inversely downregulated Bax and Caspase-3 (P < 0.001). The infarct volume observed in the Gastrodia, Uncaria, and Curcuma group was also decreased compared with the control group (P < 0.05). Immunofluorescence detection revealed a lower expression of Caspase-7 in the Gastrodia, Uncaria, and Curcuma group than in the control group, while expression was negligible in the sham group. Gastrodia, Uncaria, and Curcuma confer neuroprotective effects in CoCl2 induced B35/SH-SY5Y cells and a rat model of ischemia by way of its anti-apoptotic effects.
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