An editorial decision has been made to retract this manuscript due to breach of publishing guidelines, following the identification of non-original and manipulated figures. Reference: Jingbao Zhang, Yanfei Gao, Changbo Ma, Yi Wang: Murrayanine Induces Cell Cycle Arrest, Oxidative Stress, and Inhibition of Phosphorylated p38 Expression in A549 Lung Adenocarcinoma Cells. Med Sci Monit 2019; 25:2002-2008. 10.12659/MSM.913873.