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1.湖南中医药大学 中医药防治眼耳鼻喉疾病湖南省重点实验室,长沙 410208
2.湖南中医药大学 湖南省中医药防治眼耳鼻喉疾病与视功能保护工程技术研究中心,长沙 410208
3.湖南中医药大学 中西医结合院,长沙 410208
4.湖南中医药大学 医学院,长沙 410208
蔺婷,在读博士,从事中医药防治耳鼻咽喉疾病研究,E-mail:834426640@qq. com
何迎春,博士,教授,从事恶性肿瘤的分子机制及中医药防治研究,E-mail:1305851329@qq. com
纸质出版日期:2023-12-20,
网络出版日期:2023-02-01,
收稿日期:2022-10-28,
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蔺婷,彭佳欣,陶阳阳等.黄芪甲苷通过PI3K/Akt/mTOR通路诱导鼻咽癌细胞自噬和凋亡[J].中国实验方剂学杂志,2023,29(24):113-121.
LIN Ting,PENG Jiaxin,TAO Yangyang,et al.Astragaloside Ⅳ Induces Autophagy and Apoptosis in Nasopharyngeal Carcinoma Cells via PI3K/Akt/mTOR Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(24):113-121.
蔺婷,彭佳欣,陶阳阳等.黄芪甲苷通过PI3K/Akt/mTOR通路诱导鼻咽癌细胞自噬和凋亡[J].中国实验方剂学杂志,2023,29(24):113-121. DOI: 10.13422/j.cnki.syfjx.20230726.
LIN Ting,PENG Jiaxin,TAO Yangyang,et al.Astragaloside Ⅳ Induces Autophagy and Apoptosis in Nasopharyngeal Carcinoma Cells via PI3K/Akt/mTOR Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(24):113-121. DOI: 10.13422/j.cnki.syfjx.20230726.
目的
2
探讨黄芪甲苷对鼻咽癌细胞自噬与凋亡的影响及潜在分子机制。
方法
2
在体外实验中,通过单丹磺酰戊二胺(MDC)染色和透射电镜观察黄芪甲苷(AS-Ⅳ)对鼻咽癌细胞自噬的影响。在体内实验中,建立裸鼠移植瘤模型后采用免疫荧光法(IF)及蛋白免疫印迹法(Western blot)检测各组别中自噬和凋亡情况的变化及磷脂酰肌醇3-激酶/蛋白激酶B/哺乳动物雷帕霉素靶蛋白(PI3K/Akt/mTOR)信号通路关键蛋白的表达变化。
结果
2
与空白组比较,不同浓度AS-Ⅳ(5、10、20 μmol·L
-1
)作用于5-8F细胞后,各AS-Ⅳ组的自噬荧光强度均明显增强,其中,干预24 h,各AS-Ⅳ组的自噬荧光表达最强,10 μmol·L
-1
AS-Ⅳ组的荧光表达最明显;与空白组比较,透射电镜下自噬激活剂雷帕霉素(RAPA)诱导5-8F细胞内出现较多自噬体;3-甲基腺嘌呤(3-MA)作为自噬抑制剂,透射电镜下并未观察到5-8F细胞内有自噬体的形成;AS-Ⅳ 10 μmol·L
-1
组细胞内结构和细胞膜完整、清楚,可见自噬体形成;与空白组比较,AS-Ⅳ各组的肿瘤体积明显受到抑制(
P
<
0.05,
P
<
0.01),微管相关蛋白l轻链3 Ⅱ/微管相关蛋白l轻链3 Ⅰ(LC3 Ⅱ/Ⅰ)和活化的胱天蛋白酶-3(cleaved Caspase-3)荧光信号明显增强(
P
<
0.05,
P
<
0.01),自噬相关蛋白酵母ATG6同源物(Beclin-1)、LC3 Ⅱ/Ⅰ和凋亡相关蛋白cleaved Caspase-3、活化的多腺苷二磷酸多聚酶(cleaved PARP)的表达量均明显升高(
P
<
0.05,
P
<
0.01),而自噬相关蛋白泛素结合蛋白(p62)的表达明显下调(
P
<
0.05,
P
<
0.01);磷酸化(p)-PI3K、p-Akt、p-mTOR蛋白表达量明显降低(
P
<
0.05,
P
<
0.01)。
结论
2
黄芪甲苷可诱导鼻咽癌细胞发生自噬和凋亡,其机制可能是通过激活PI3K/Akt/mTOR信号通路。
Objective
2
To investigate the effect and underlying molecular mechanism of astragaloside-Ⅳ (AS-Ⅳ) on autophagy and apoptosis of nasopharyngeal carcinoma cells.
Method
2
In
experiments
in vitro
, the effect of AS-Ⅳ on the autophagy of nasopharyngeal carcinoma cells was observed by monodansylcadaverine (MDC) staining and transmission electron microscopy (TEM). In experiments
in vivo
, immunofluorescence (IF) and Western blot were used to detect the changes in autophagy and apoptosis and the expression of key proteins in the phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/Akt/mTOR) signaling pathway after the establishment of a xenograft tumor model in nude mice.
Result
2
After 5-8F cells were treated with AS-Ⅳ of different doses (5, 10, 20 μmol·L
-1
), the fluorescence intensity of autophagy in AS-Ⅳ groups significantly increased as compared with that in the blank group. The fluorescence expression of autophagy in AS-Ⅳ groups was the strongest after intervention for 24 hours, and the fluorescence expression in the 10 μmol·L
-1
AS-Ⅳ group was the most obvious. The autophagy activator rapamycin (RAPA) induced more autophagosomes in 5-8F cells under the transmission electron microscope, and 3-methyladenine (3-MA), an autophagy inhibitor, did not induce autophagosome formation in 5-8F cells under the transmission electron microscope as compared with the results in the blank group. In the 10 μmol·L
-1
AS-Ⅳ group, the intracellular structure and cell membrane were intact and clear, and autophagosome formation was observed. Compared with the blank group, the AS-Ⅳ groups showed inhibited tumor volume (
P
<
0.05,
P
<
0.01), potentiated fluorescence signals of microtubule-associated protein l light chain 3 type Ⅱ/microtubule-associated protein l light chain 3 type Ⅰ (LC3 Ⅱ/Ⅰ) and cleaved Caspase-3 (
P
<
0.05,
P
<
0.01), increased expression levels of the mammalian homolog of yeast ATG6 (Beclin-1), LC3 Ⅱ/Ⅰ, cleaved Caspase-3, and cleaved PARP (
P
<
0.05,
P
<
0.01), down-regulated expression of ubiquitin-binding protein (p62) (
P
<
0.05,
P
<
0.01), and reduced protein expression levels of phosphorylated PI3K (p-PI3K), phosphorylated Akt (p-Akt), and phosphorylated mTOR (p-mTOR) (
P
<
0.05,
P
<
0.01).
Conclusion
2
AS-Ⅳ can induce autophagy and apoptosis of nasopharyngeal carcinoma cells, and the mechanism is presumably attributed to the activation of the PI3K/Akt/mTOR signaling pathway.
鼻咽癌黄芪甲苷自噬凋亡磷脂酰肌醇3-激酶/蛋白激酶B/哺乳动物雷帕霉素靶蛋白(PI3K/Akt/mTOR)
nasopharyngeal carcinomaastragaloside Ⅳautophagyapoptosisphosphatidylinositol 3-kinases/protein kinase B/mammalian target of rapamycin(PI3K/Akt/mTOR)
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