Hui WANG, Lu-zhou XU, Jian WU, et al. Effect of Modified Lichongtang Combined with 5-Fluorouracil on Epithelial Mesenchymal Transition of Human Hepatoma Cell Line HepG2[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(7): 14-21.
DOI:
Hui WANG, Lu-zhou XU, Jian WU, et al. Effect of Modified Lichongtang Combined with 5-Fluorouracil on Epithelial Mesenchymal Transition of Human Hepatoma Cell Line HepG2[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(7): 14-21. DOI: 10.13422/j.cnki.syfjx.20190621.
Effect of Modified Lichongtang Combined with 5-Fluorouracil on Epithelial Mesenchymal Transition of Human Hepatoma Cell Line HepG2
To investigate the effect of modified Lichongtang combined with 5-fluorouracil (5-FU) on epithelial-mesenchymal transition (EMT) of human hepatoma HepG2 cells.
Method:
2
The growth of HepG2 cells was detected by methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay
and the effect of Chinese medicine and 5-FU alone or combined use on the growth of HepG2 cells was analyzed by the principle of efficacy. The growth curves of HepG2 cells were plotted to determine the relationship between drug effect and combination index as well as the interaction between drugs. Scratch test was used to detect the effect of modified Lichongtang combined with 5-FU on the migration of HepG2 cells. Cell invasion assay (transwell chamber) was used to detect the effect of modified Lichongtang combined with 5-FU on the invasion ability of HepG2 cells. Real-time quantitative polymerase chain reaction (PCR) was used to detect the effect of modified Lichongtang combined with 5-FU on EMT-related genes E-cadherin
N-cadherin and Zinc finger transcription factors (snail
twist) mRNA expression after 24 hours of treatment on HepG2 cells. The expression levels of E-cadherin
N-cadherin
Snail and Vimentin in HepG2 cells were detected by Western blot after treatment by modified Lichongtang combined with 5-FU for 24 hours.
Result:
2
MTT assay showed that with the increase of drug concentration
the inhibitory effect of modified Lichongtang
5-FU alone or combined use on HepG2 cell growth was also increased. Statistical analysis showed that the combined use of these two drugs at a low dosage could produce better synergistic effect on HepG2 cells after 24 hours of treatment. Therefore
modified Lichongtang and 5-FU were selected to treat HepG2 cells for 24 hours. 25%inhibitory concentration (IC
25
) was 800 mg·L
-1
modified Lichongtang
3.125 mg·L
-1
5-FU. Blank group
5-FU group
Lichongtang+ 5-FU group
and modified Lichongtang group were set for follow-up experiments. Scratch and invasion experiments showed that modified Lichongtang
5-FU alone and combined use can inhibit HepG2 cell migration and invasion ability (
P
<
0.05
P
<
0.01). As compared with 5-FU group
the inhibitory effect was more obvious in modified Lichongtang+ 5-FU group. As compared with the blank group
the mRNA expression of E-cadherin were up-regulated
while the mRNA expression levels of N-cadherin
Snail and Twist were and down-regulated in the 5-FU group and the 5-FU+ modified Lichongtang group (
P
<
0.05
P
<
0.01). As compared with 5-FU group
the mRNA expression of E-cadherin was up-regulated while the mRNA expression levels N-cadherin
Snail and Twist were down-regulated in the 5-FU+ modified Lichongtang group (
P
<
0.05
P
<
0.01). Western blot showed that as compared with the blank group
E-cadherin protein expression was up-regulated while N-cadherin
Snail and Vimentin protein expression levels were down-regulated in 5-FU group and 5-FU+ modified Lichongtang group (
P
<
0.05
P
<
0.01). As compared with the 5-FU group
E-cadherin protein expression was up-regulated while N-cadherin
Snail
and Vimentin protein expression levels were down-regulated in 5-FU+ modified Lichongtang group (
P
<
0.05
P
<
0.01).
Conclusion:
2
Modified Lichongtang combined with 5-FU can produce a better synergistic effect on HepG2 cells at a low dosage for 24 hours
and can significantly inhibit the migration and invasion of hepatocellular carcinoma cells
up-regulate the expression of E-cadherin
down-regulate the expression of N-cadherin
Snail
Vimentin and Twist in hepatocellular carcinoma cells. Inhibition of tumor cell proliferation
migration
invasion and EMT-related gene expression may be associated with enhancing the efficacy of chemotherapy drugs
and may act as one of the mechanisms for synergistic effect of modified Lichongtang combined with 5-FU.
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