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1.安徽中医药大学,合肥 230012
2.安徽省中医药科学院 中西医结合研究所,合肥 230012
3.中药复方安徽省重点实验室,合肥 230012
Received:08 December 2021,
Published Online:29 January 2022,
Published:20 June 2022
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丁芮,周鹏,王翔等.基于Wnt5a/Ca2+/NFAT信号通路研究小陷胸汤调控Ca2+载量抑制MGC-803细胞侵袭迁移和上皮间质转化作用[J].中国实验方剂学杂志,2022,28(12):1-11.
DING Rui,ZHOU Peng,WANG Xiang,et al.Xiao Xianxiongtang Regulates Ca2+ Load and Inhibits Epithelial-mesenchymal Transition, Invasion, and Migration of MGC-803 Cells: Based on Wnt5a/ Ca2+/NFAT Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):1-11.
丁芮,周鹏,王翔等.基于Wnt5a/Ca2+/NFAT信号通路研究小陷胸汤调控Ca2+载量抑制MGC-803细胞侵袭迁移和上皮间质转化作用[J].中国实验方剂学杂志,2022,28(12):1-11. DOI: 10.13422/j.cnki.syfjx.20220727.
DING Rui,ZHOU Peng,WANG Xiang,et al.Xiao Xianxiongtang Regulates Ca2+ Load and Inhibits Epithelial-mesenchymal Transition, Invasion, and Migration of MGC-803 Cells: Based on Wnt5a/ Ca2+/NFAT Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(12):1-11. DOI: 10.13422/j.cnki.syfjx.20220727.
目的
2
探讨小陷胸汤对转化生长因子-
β
1
(TGF-
β
1
)诱导胃癌MGC-803细胞侵袭转移及上皮间质转化的影响,并探讨其可能的机制。
方法
2
通过CB-DOCK在线平台(
http: //clab
http://clab
. labshare. cn /cb-dock /)预测小陷胸汤与活化T细胞核转录因子(NFAT)分子对接。使用质量浓度为10 μg·L
-1
的TGF-
β
1
建立人胃癌MGC-803细胞侵袭转移模型,将MGC-803细胞分为空白组、模型组、小陷胸汤组(0.1、0.2、0.4 g·L
-1
),为进一步探讨Wnt5a/Ca
2+
/NFAT信号通路在小陷胸汤抑制胃癌中的关键参与作用,将Wnt5a过表达质粒转染MGC-803细胞,分为空白质粒组、Wnt5a-OE组、空白质粒+小陷胸汤(0.4 g·L
-1
)组和Wnt5a-OE+小陷胸汤(0.4 g·L
-1
)组。分别使用细胞增殖与活性检测(CCK-8)法、Transwell小室实验、划痕愈合实验、蛋白免疫印迹法(Western blot)、免疫荧光法检测MGC-803细胞活力、侵袭能力、迁移能力、E-钙黏蛋白(E-cadherin)、N-钙黏蛋白(N-cadherin)、波形蛋白(Vimentin)、锌指蛋白(Snail)、Wnt5a/Ca
2+
/NFAT信号通路关键蛋白Wnt5a、钙调神经磷酸酶(CaN)、NFAT1、磷酸化(p)-NFAT1和NFAT1核蛋白表达以及细胞Ca
2+
浓度变化。
结果
2
分子对接提示小陷胸汤作用于Wnt5a/Ca
2+
/NFAT信号通路。与模型组比较,小陷胸汤(0.1、0.2、0.4 g·L
-1
)能明显促进MGC-803细胞活力的丧失,可通过基质凝胶侵入Transwell下室抑制细胞,并以剂量依赖性的方式减缓细胞划痕愈合,并促进E-cadherin的表达,抑制N-cadherin、Vimentin和Snail的表达(
P
<
0.05,
P
<
0.01)。进一步实验表明,与模型组比较,小陷胸汤可以抑制Wnt5a、CaN、NFAT1和p-NFAT1的表达,降低NFAT1核表达和NFAT1介导的转录活性,从而降低细胞Ca
2+
浓度,且可逆转Wnt5a的作用(
P
<
0.05,
P
<
0.01)。
结论
2
小陷胸汤可通过Wnt5a/Ca
2+
/NFAT通路减弱人胃癌MGC-803细胞的侵袭转移和上皮间质转化(EMT),从而减弱TGF-
β
1
诱导的促瘤作用。这提示小陷胸汤可能通过调节胃癌的侵袭、转移和EMT来预防和治疗胃癌。
Objective
2
To explore the effect of Xiao Xianxiongtang (XXXT) on the transforming growth factor (TGF)-
β
1
-induced invasion, metastasis, and epithelial-mesenchymal transition (EMT) of gastric cancer MGC-803 cells and the underlying mechanism.
Method
2
The molecular docking between XXXT
and nuclear factor of activated T cells (NFAT) was performed by CB-DOCK (
http://clab.labshare.cn/cb-dock/
http://clab.labshare.cn/cb-dock/
). The invasion and metastasis model of MGC-803 cells was established with 10 μg·L
-1
TGF-
β
1
. MGC-803 cells were classified into blank group, model group, 0.1 g·L
-1
XXXT group, 0.2 g·L
-1
XXXT group, and 0.4 g·L
-1
XXXT group. For further clarifying the key role of Wnt5a/Ca
2+
/NFAT signaling pathway in the inhibition of XXXT on gastric cancer, MGC-803 cells were transfected with Wnt5a overexpression plasmid, and then the cells were classified into blank plasmid group, Wnt5a-OE group, blank plasmid + XXXT (0.4 g·L
-1
) group, and Wnt5a-OE + XXXT (0.4 g·L
-1
) group. Cell viability was determined by cell counting kit-8 (CCK-8) assay, cell invasion and migration ability by Transwell invasion assay and wound healing assay, expression of EMT-related proteins (E-cadherin, N-cadherin, Vimentin, Snail) and Wnt5a/Ca
2+
/NFAT signaling pathway-related key proteins [Wnt5a, calcineurin (CaN), NFAT1, and p-NFAT1] by Western blot, and changes in intracellular Ca
2+
concentration by immunofluorescence assay.
Result
2
Molecular docking suggested that XXXT acted on Wnt5a/Ca
2+
/NFAT signaling pathway. XXXT (0.1, 0.2, 0.4 g·L
-1
) significantly promoted the loss of MGC-803 cell viability (
P
<
0.05,
P
<
0.01). It inhibited cells from invading the transwell lower chamber and slowed down the healing of cell wounds in a dose-dependent manner (
P
<
0.05,
P
<
0.01). Moreover, it promoted the expression of E-cadherin while suppressed the expression of N-cadherin, Vimentin, and Snail (
P
<
0.05,
P
<
0.01). Further experiments showed that XXXT could inhibit the expression of Wnt5a, CaN, NFAT1, and p-NFAT1, and reduce the nuclear expression of NFAT1 and the transcription activity mediated by NFAT1, so as to reduce the cellular Ca
2+
concentration (
P
<
0.05,
P
<
0.01). XXXT can reverse the effect of Wnt5a (
P
<
0.05,
P
<
0.01).
Conclusion
2
XXXT can attenuate the invasion, metastasis, and EMT of MGC-803 cells via the Wnt5a/Ca
2+
/NFAT pathway, thereby weakening the tumor-promoting effect of TGF-
β
1
. In summary, XXXT may exert therapeutic effect on gastric cancer by regulating the invasion, metastasis, and EMT of gastric cancer cells.
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