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贵州医科大学,贵阳 550025
黄贤威,在读硕士,从事药食两用资源与肿瘤研究,E-mail:1293859391@qq.com
魏洪,博士,副教授,从事病毒溶瘤、药食两用资源与肿瘤研究,E-mail:263676470@qq.com
收稿日期:2021-04-29,
网络出版日期:2021-07-06,
纸质出版日期:2021-09-05
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黄贤威,李戈,姚梦玮等.辣椒碱通过TRPV1诱导结肠癌SW480细胞凋亡[J].中国实验方剂学杂志,2021,27(17):75-82.
HUANG Xian-wei,LI Ge,YAO Meng-wei,et al.Capsaicin Induces Apoptosis of Colon Cancer SW480 Cells Through TRPV1[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(17):75-82.
黄贤威,李戈,姚梦玮等.辣椒碱通过TRPV1诱导结肠癌SW480细胞凋亡[J].中国实验方剂学杂志,2021,27(17):75-82. DOI: 10.13422/j.cnki.syfjx.20211796.
HUANG Xian-wei,LI Ge,YAO Meng-wei,et al.Capsaicin Induces Apoptosis of Colon Cancer SW480 Cells Through TRPV1[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(17):75-82. DOI: 10.13422/j.cnki.syfjx.20211796.
目的
2
探讨辣椒碱通过瞬时受体电位香草酸亚型1(TRPV1)对人结肠癌SW480细胞的影响及可能的分子机制。
方法
2
设立辣椒碱组及空白组,通过细胞增殖与活性检测-8(CCK-8)法检测辣椒碱(50,100,200,300,400,500,600,800,1 000 μmol·L
-1
)处理SW480细胞12,24,48 h后的细胞活性,选取有效抑制增殖的辣椒碱浓度;采用流式细胞术检测辣椒碱干预(200,400,800 μmol·L
-1
)后细胞凋亡及细胞周期的变化;采用蛋白免疫印迹法(Western blot)检测辣椒碱(200,400 μmol·L
-1
)干预后TRPV1,肿瘤抑制蛋白p53,磷酸化p53(p-p53),抑癌基因[B细胞淋巴瘤-2(Bcl-2),Bcl-2相关X蛋白(Bax)],活化的天冬氨酸蛋白水解酶-3(cleaved Caspase-3),cleaved Caspase-8,活化的聚腺苷二磷酸核糖聚合酶(cleaved PARP)的蛋白表达的影响;此外,利用微小RNA(mRNA)沉默技术作用TRPV1,观察200 μmol·L
-1
辣椒碱处理沉默TRPV1的SW480细胞凋亡率的变化,以及上述蛋白表达的影响。
结果
2
与空白组比较,辣椒碱50,100 μmol·L
-1
作用对细胞活性未出现显著影响,浓度在200 μmol·L
-1
以上时,随浓度增加细胞活性逐渐降低(
P
<
0.01),呈剂量依赖效应;与空白组比较,辣椒碱200,400,800 μmol·L
-1
处理可明显诱导细胞凋亡(
P
<
0.05,
P
<
0.01);200,400 μmol·L
-1
辣椒碱干预下,细胞生长表现为G
2
/M期阻滞,800 μmol·L
-1
表现为G
0
/G
1
期阻滞(
P
<
0.05);与空白组比较,辣椒碱200,400 μmol·L
-1
处理细胞能够明显上调上述凋亡途径中相关蛋白(p53,p-p53,Bax,cleaved Caspase-3,cleaved Caspase-8,cleaved PARP)的表达(
P
<
0.05,
P
<
0.01),Bcl-2蛋白表达显著下调(
P
<
0.01);沉默TRPV1能明显抑制辣椒碱诱导的细胞凋亡及凋亡通路蛋白表达(
P
<
0.05,
P
<
0.01)。
结论
2
辣椒碱可能通过TRPV1受体抑制SW480细胞增殖,阻滞细胞周期并诱导细胞凋亡。
Objective
2
To investigate the effects of capsaicin on colon cancer SW480 cells and the underlying molecular mechanism through the transient receptor potential vanilloid 1(TRPV1).
Method
2
Capsaicin groups with different concentrations and a blank group were set up. The cell viability was detected by cell counting kit-8 (CCK-8) after SW480 cells were treated with capsaicin(50,100,200,300,400,500,600,800,1 000 μmol·L
-1
) for 12,24,and 48 h to select the concentration of capsaicin which can effectively inhibit proliferation. The cell cycle and apoptosis were detected by flow cytometry after SW480 cells were treated with capsaicin (200,400,800 μmol·L
-1
) for 24 h. The protein expression levels of TRPV1,p53,p-p53,B-cell lymphoma-2(Bcl-2),Bcl-2-associated X protein(Bax),cleaved cysteinyl aspartate-specific protease-3(cleaved Caspase-3),cleaved Caspase-8,and cleaved poly adenosine diphosphate ribose polymerase (PARP) were detected by Western blot after SW480 cells were treated with capsaicin (200,400 μmol·L
-1
) for 24 h.In addition,the apoptosis was detected after SW480 cells were treated with TRPV1 microRNA(mRNA) and capsaicin(200 μmol·L
-1
). Western blot analysis was used to detect the protein expression levels of the above proteins.
Result
2
As compared with the blank group,capsaicin(≥200 μmol·L
-1
)significantly inhibited the cell viability of SW480 cells(
P
<
0.01) in dose- and time-dependent manners. The cell cycle was arrested in G
2
/M phase by 200 and 400 μmol·L
-1
capsaicin treatment,and arrested in G
1
phase by 800 μmol·L
-1
capsaicin treatment (
P
<
0.05). Flow cytometry showed that capsaicin (200, 400, 800 μmol·L
-1
) significantly promoted apoptosis of SW480 cells simultaneously(
P
<
0.05,
P
<
0.01). Western blot showed that capsaicin (200,400 μmol·L
-1
) significantly up-regulated the protein levels of apoptosis-related proteins(p53,p-p53,Bax,cleaved Caspase-3,cleaved Caspase-8,and cleaved PARP) (
P
<
0.05,
P
<
0.01),and significantly down-regulated Bcl-2(
P
<
0.01). In addition,siRNA-mediated knockdown of TRPV1 significantly attenuated capsaicin-induced apoptosis and the protein levels of apoptosis-related proteins in SW480 cells(
P
<
0.05,
P
<
0.01).
Conclusion
2
Capsaicin can inhibit cell proliferation,arrest cell cycle,and induce apoptosis of SW480 cells,and the possible mechanism may be related to TRPV1 activation.
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