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1.内蒙古医科大学附属人民医院肿瘤内科,呼和浩特 010010
2.内蒙古医科大学基础医学院免疫学教研室,呼和浩特 010050
祁 冶,Email:qyiscool2021@163.com, 研究方向:肿瘤学。
王秀梅,Email:wangxiumei75@163.com。
收稿:2022-06-10,
修回:2022-06-21,
录用:2022-08-24,
纸质出版:2023-02-28
移动端阅览
祁冶,潘海婷,王秀梅.SCR7对三阴性乳腺癌顺铂化疗的增敏作用研究[J].重庆医科大学学报,2023,48(2):220-225.
Qi Ye,Pan Haiting,Wang Xiumei.Study on the sensitizing effect of SCR7 on cisplatin chemotherapy in triple-negative breast cancer[J].Journal of Chongqing Medical University,2023,48(2):220-225.
祁冶,潘海婷,王秀梅.SCR7对三阴性乳腺癌顺铂化疗的增敏作用研究[J].重庆医科大学学报,2023,48(2):220-225. DOI: 10.13406/j.cnki.cyxb.003166.
Qi Ye,Pan Haiting,Wang Xiumei.Study on the sensitizing effect of SCR7 on cisplatin chemotherapy in triple-negative breast cancer[J].Journal of Chongqing Medical University,2023,48(2):220-225. DOI: 10.13406/j.cnki.cyxb.003166.
目的
2
探讨SCR7对三阴性乳腺癌顺铂化疗的增敏作用。
方法
2
选用三阴乳腺癌MDA-MB-231细胞分为空白对照组、10 μmol/L顺铂对照组和联合组(10 μmol/L顺铂+10、20和40 μmol/L SCR7),采用CCK-8法检测细胞活性并计算细胞增殖抑制率;取对数期TNBC MDA-MB-231细胞构建三阴性乳腺癌移植瘤小鼠模型,建模成功后荷瘤裸鼠随机分为对照组、SCR7组,顺铂组、SCR7+顺铂组;饲养24 d后,观察比较各组荷瘤鼠肿瘤质量、瘤体体积的变化,计算肿瘤抑制率;苏木精-伊红(hematoxylin-eosin,HE)染色观察瘤体组织细胞形态学变化;原位末端标记法(
in situ
end labeling,TUNEL)检测乳腺癌肿瘤组织的凋亡;采用Western blot检测X射线修复交叉互补蛋白1(X-ray repair cross complementing 1,XRCC1)、多聚(ADP核糖)聚合酶1[poly(adp ribose) polymerase 1,PARP1
]
蛋白表达。
结果
2
联合组细胞增殖抑制率均高于对照组(
P
<
0.05),且随SCR7质量浓度增大呈逐渐升高趋势(
P
<
0.05)。体内动物实验发现:相较于对照组,SCR7组、顺铂组、SCR7+顺铂组中的乳腺癌肿瘤体积、瘤重减小(
P
<
0.05),其肿瘤抑制率分别是32%、40%、81%;SCR7+顺铂组较顺铂组减少更明显(
P
<
0.05),且小鼠体质量与SCR7组、顺铂组相比无明显差异(
P
>
0.05);HE染色观察干预组肿瘤组织均呈现明显形态学改变,其中SCR7+顺铂组肿瘤细胞退变变化最明显;TUNEL染色显示SCR7+顺铂组肿瘤细胞凋亡最为严重,可见大量红色细胞凋亡;Western blot检测发现,SCR7+顺铂组XRCC1、PARP1蛋白表达均明显低于其他组,差异均有统计学意义(
P
<
0.05)。
结论
2
SCR7在体内外对三阴乳腺癌顺铂化疗均有增敏作用。
Objective
2
To investigate the sensitizing effect of SCR7 on cisplatin chemotherapy in triple-negative breast cancer(TNBC).
Methods
2
MDA-MB-231 cells of TNBC were selected and divided into blank control group,10 μmol/L cisplatin control group and combined group(10 μmol/L cisplatin + 10,20 and 40 μmol/L SCR7). CCK-8 method was used to detect cell activity and calculate cell proliferation inhibition rate. A TNBC mice model was constructed by using TNBC MDA-MB-231 cells. The nude mice were randomly divided into control group,SCR7 group,cisplatin group and SCR7+cisplatin group. After 24 days of feeding,the changes of mass and tumor volume of tumor-bearing mice in all groups were observed and compared,and the tumor inhibition rate was calculated. Morphological changes of tumor cells were observed by hematoxylin - eosin(HE) staining. The apoptosis of tumor cells was detected by
in situ
end labeling(TUNEL) method,and the expressions of X-ray repair cross complementing 1(XRCC1) and poly(ADP-ribose) polymerase 1(PARP1) proteins were detected by Western blot.
Results
2
The cell proliferation inhibition rate in the combined group was higher than that in the control group(
P
<
0.05),and it wasgradually increased with the increase of SCR7 concentration(
P
<
0.05). Animal experiments
in vivo
found:compared with the control group,the tumor volume and tumor weight of breast cancer in SCR7 group,cisplatin group and SCR7+cisplatin group decreased(
P
<
0.05),and the tumor inhibition rates were 32%,40% and 81%,respectively. The SCR7+cisplatin group showed a more significant reduction than SCR7 group and cisplatin group(
P
<
0.05),but there was no significant difference in mouse body weight compared to the cisplatin group(
P
>
0.05). The tumor tissues in the intervention gro
ups showed obvious morphological changes by HE staining,among which the tumor cells in the SCR7+cisplatin group showed the most obvious degenerative changes. TUNEL staining showed that the tumor cells in the SCR7+cisplatin group had the most serious apoptosis,and a large number of red apoptotic cells were seened. Western blotting showed that the protein expressions of XRCC1 and PARP1 in SCR7+cisplatin group were significantly lower than those in other groups,and the differences were statistically significant(
P
<
0.05).
Conclusion
2
SCR7 has sensitizing effect on cisplatin chemotherapy for TNBC
in vivo
and
in vitro
.
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