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Concern about: Echinacoside exerts anti-tumor activity via the miR-503-3p/TGF-β1/Smad aixs in liver cancer
Cancer Cell International volume 21, Article number: 617 (2021)
We concentrated on a paper in Cancer Cell International “Echinacoside exerts anti-tumor activity via the miR-503-3p/TGF-β1/Smad aixs in liver cancer”. Echinacoside may be a safe and effective anti-tumor agent for the treatment of liver cancer. However, some problems in this paper made us confused.
To the editor,
With high enthusiasm, we read a paper “Echinacoside exerts anti-tumor activity via the miR-503-3p/TGF-β1/Smad aixs in liver cancer” published in Cancer Cell International . Li et al. revealed that echinacoside could retard cell proliferation, migration, and invasion, and induce apoptosis of liver cancer cells. Nevertheless, several issues in the paper are worthy of attention and comment.
In the paper, echinacoside suppressed the invasion and migration of liver cancer cells after incubation with the agent (10 mg/ml and 20 mg/ml) for 24 h (seeing Fig. 3). However, authors also suggested that echinacoside significantly inhibited cell proliferation and promoted apoptosis of liver cancer cells after incubation with the same working concentration (10 mg/ml and 20 mg/ml) for the same time (24 h) (seeing Fig. 2 and 4). Another two studies also demonstrated that echinacoside could suppress proliferation and induce apoptosis in hepatocellular carcinoma cell line HepG2 at 0.05 mg/ml for 48 h and colorectal cancer cells [2, 3]. These data forcefully showed that the reason responsible for decrease of migration and invasion of liver cancer cells could be owing to apoptosis induction of echinacoside. Authors could treat the cells with echinacoside with lower concentrations or for a short time when investigating the inherent effects of agent on the migration and invasion ability of cells without apoptosis induction. This would make the results more convincing. In addition, as showed in the Fig. 2, there was a significantly difference between 5 mg/ml group and the control group. However, there was no p value on the graph. These made us confused.
Availability of data and materials
Li W, Zhou J, Zhang Y, Zhang J, Li X, Yan Q, et al. Echinacoside exerts anti-tumor activity via the miR-503-3p/TGF-β1/Smad aixs in liver cancer. Cancer Cell Int. 2021;21(1):304. https://doi.org/10.1186/s12935-021-01890-3.
Ye Y, Song Y, Zhuang J, Wang G, Ni J, Xia W. Anticancer effects of echinacoside in hepatocellular carcinoma mouse model and HepG2 cells. J Cell Physiol. 2019;234(2):1880–8. https://doi.org/10.1002/jcp.27063.
Dong L, Yu D, Wu N, Wang H, Niu J, Wang Y, et al. Echinacoside induces apoptosis in human SW480 colorectal cancer cells by induction of oxidative DNA damages. Int J Mol Sci. 2015;16(7):14655–68. https://doi.org/10.3390/ijms160714655.
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Lin, J. Concern about: Echinacoside exerts anti-tumor activity via the miR-503-3p/TGF-β1/Smad aixs in liver cancer. Cancer Cell Int 21, 617 (2021). https://doi.org/10.1186/s12935-021-02311-1
- Liver cancer