Meta-Analysis of Preventive and Therapeutic Effects of Ligustrazine on Airway Remodeling in Asthmatic Rats

Abstract

Objective. To assess the effect of ligustrazine on airway remodeling in asthmatic rats. Methods. To collect studies on the effects of ligustrazine on airway remodeling in asthmatic rat models, PubMed, Embase, CBM, Cochrane, Chinese Knowledge Infrastructure (CNKI), VIP, and Wanfang data (WANFANG) were searched using a computer. Two investigators independently screened the literature, extracted the data, and assessed the methodological quality by complying with the inclusion criteria. Moreover, a meta-analysis was conducted by adopting Stata 11.0. Results. On the whole, 10 articles were included. As indicated from the meta-analysis, we have the following: Circled digit one ligustrazine was capable of reducing the thickness of the airway smooth muscle and inhibiting the proliferation of smooth muscle (WMD = -5.98, 95% CI (-7.75, -4.42), P≤0.001); Circled digit two ligustrazine could reduce the thickness of the airway wall and mitigate tracheal stenosis (WMD = 0.12, 95% CI (0.05, 0.20), P≤0.001); Circled digit three ligustrazine could decrease the number of eosinophils in the lung tissue and reduce airway inflammation (WMD = -14.47, 95% CI (-18.09, -10.86), P≤0.001). Conclusion. Ligustrazine was demonstrated to be an effective therapeutic drug in asthmatic rats by preventing and treating airway remodeling. Further high-quality experimental studies should be conducted to investigate the mechanism of ligustrazine action in depth.