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Int J Biol Sci 2016; 12(4):367-380. doi:10.7150/ijbs.14059

Research Paper

Lyophilized Powder of Catalpol and Puerarin Protects Neurovascular Unit from Stroke

Qiang XUE1, Yang LIU1, Ran HE1, Sheng YANG1, Jie TONG1, Xu LI1, Yi CHEN1, Xiaoyu XU1,2,3 ✉

1. College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing 400715, China;
2. Chongqing Engineering Research Center for Pharmacological Evaluation, Chongqing 400715, China;
3. Institute of Chinese Medicine, Southwest University, Chongqing 400715, China.

Abstract

Hunting for an effective medicine for brain stroke has been a medical task in neuroscience for decades. The present research showed that the lyophilized Powder of Catalpol and Puerarin (C-P) in all the tested doses (65.4 mg/kg, 32.7 mg/kg, 16.4 mg/kg) significantly reduced the neurological deficiency, infarct volume and apoptotic cells in ischemic/reperfusion (I/R) rats. It also promoted astrocyte processes and prolonged neuron axons in infarct area. Further, it decreased MDA, NO, NF-κB/p65, TNF-α, IL-1β and IL-6 and enhanced the EPOR and GAF-43. 65.4 mg/kg and 32.7 mg/kg C-P could up-regulated EPO and VEGF significantly. In vitro, 49 μg/mL and 24.5 μg/mL C-P decreased the leakage of sodium fluorescein and increased the activity of γ-GTP. Additionally, it increased SOD and decreased MDA, NO, and LDH and decreased NF-κB/p65, TNF-α, IL-1β and IL-6 and unregulated EPO, EPOR, VEGF, and GAP-43. Only the dose of 49 μg/mL increased TEER and Claudin-5 and turned the typically damaged morphologies of neurons, astrocytes and endothelium into a favorable trend. These data imply that C-P improved the recovery of neurological deficiency in motor, sense, balance and reflex, and protected the whole NVU by anti-oxidative stress, anti-inflammation and up-regulating some protective factors. This research provides a candidate medicine for brain stroke and, at the same time, a pattern for drug study targeting NVU in vitro.

Keywords: Neurovascular Unit, Lyophilized Powder of Catalpol and Puerarin, Brain stroke, Oxygen and glucose deprivation, Neuroprotection.

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How to cite this article:
XUE Q, LIU Y, HE R, YANG S, TONG J, LI X, CHEN Y, XU X. Lyophilized Powder of Catalpol and Puerarin Protects Neurovascular Unit from Stroke. Int J Biol Sci 2016; 12(4):367-380. doi:10.7150/ijbs.14059. Available from http://www.ijbs.com/v12p0367.htm