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Loquat [Eriobotrya japonica (Lindl.)] is a traditional Chinese medicine, which has been used as an anti-inflammatory and for curing chronic bronchitis among other potential applications. Extracted ursolic acid (UA) and oleanolic acid (OA) from wild loquat were previously found capable of suppressing the proliferation of A549 cells in vitro. In the current study, nude mice were used to determine the inhibitory effect of UA and OA on tumor formation in vivo. The results demonstrate that UA and OA reduced the proliferation of A549 cells in nude mice, and increased the expression of Bid while decreasing the protein levels of MMP-2, Ki-67, and CD34. In this study, we identified potential antitumor activity in a wild loquat extract containing UA and OA, which demonstrates that traditional Chinese medicine may have a role in treating certain types of cancer.

Inhibitory effect of ursolic acid and oleanolic acid from Eriobotrya fragrans on A549 cell viability in vivo