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400010 重庆, 重庆医科大学附属第二医院三腺外科
[ 明佳, E-mail:mjia1001@sina.com MING Jia, E-mail:mjia1001@sina.com
收稿:2018-01-15,
修回:2018-03-15,
纸质出版:2018-08-15
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代朦, 靳鑫, 雷优扬, 等. 过表达miR-382的肿瘤相关巨噬细胞对三阴性乳腺癌生物学特性的影响[J]. 第三军医大学学报, 2018,40(15):1375-1382.
Meng DAI, Xin JIN, Youyang LEI, et al. Effect of miR-382 overexpressing tumor-associated macrophages on biological properties of triple-negative breast cancer 4T1 cells[J]. Journal of Third Military Medical University, 2018, 40(15): 1375-1382.
代朦, 靳鑫, 雷优扬, 等. 过表达miR-382的肿瘤相关巨噬细胞对三阴性乳腺癌生物学特性的影响[J]. 第三军医大学学报, 2018,40(15):1375-1382. DOI: 10.16016/j.1000-5404.201801107.
Meng DAI, Xin JIN, Youyang LEI, et al. Effect of miR-382 overexpressing tumor-associated macrophages on biological properties of triple-negative breast cancer 4T1 cells[J]. Journal of Third Military Medical University, 2018, 40(15): 1375-1382. DOI: 10.16016/j.1000-5404.201801107.
目的
2
探讨microRNA-382(miR-382)在肿瘤相关巨噬细胞(tumor-associated macrophages,TAMs)中的表达对三阴性乳腺癌(triple-negative breast cancer,TNBC)细胞(4T1)生物学特性的影响。
方法
2
以小鼠腹腔巨噬细胞(mouse peritoneal macrophages,PMs)作为研究对象,分为PMs组,TAMs组和L-TAMs组;Western blot与qRT-PCR检测极化指标(IL-10、TNF-α)、miR-382、PGC-1α和NF-κB的表达变化;流式细胞术检测TAMs的极化变化(CD86、CD206);激光共聚焦显微镜成像检测PGC-1α和NF-κB的表达变化;以4T1细胞作为研究对象,分为4T1组,4T1+PMs组和4T1+L-PMs组,流式细胞术检测细胞凋亡率与细胞周期;Transwell侵袭实验检测细胞侵袭能力。
结果
2
与PMs组比较,TAMs组IL-10、CD206和PGC-1α表达明显增加(
P
<
0.05),miR-382、TNF-α和CD86表达明显降低(
P
<
0.05),NF-κB转录活性显著降低(
P
<
0.05),而L-TAMs组TNF-α、CD86和miR-382表达明显增高(
P
<
0.05),IL-10、CD206和PGC-1α表达明显降低(
P
<
0.05),NF-κB转录活性显著增强(
P
<
0.05);与4T1组比较,4T1+PMs组侵袭能力明显增强(
P
<
0.05),凋亡率明显下降(
P
<
0.05),而4T1+L-PMs组侵袭能力明显下降(
P
<
0.05),凋亡率明显增高(
P
<
0.05)。
结论
2
TAMs通过调节miR-382的表达可抑制TNBC的侵袭和增殖,其机制可能与TAMs中miR-382抑制PGC-1α的表达、增强NF-κB的转录活性,进而抑制TAMs的M2分化有关。
Objective
2
To investigate the effect of microRNA-382 (miR-382) in tumor-associated macrophages (TAMs) on the biological characteristics of triple-negative breast cancer cells
in vitro
.
Methods
2
Mouse peritoneal macrophages (PMs) were used as research subjects and divided into PMs group
TAMs group and L-TAMs group (miR-382 overexpressing PMs cocultured with 10%TAM in a Transwell chamber system). Western blotting and qRT-PCR were used to detect the markers of polarization (IL-10
TNF-α) and the expression changes of miR-382
PGC-1α and NF-κB. Flow cytometry was employed to determine the polarization changes of TAMs (CD86
CD206)
and laser confocal microscopy to observe the expression of PGC-1α and NF-κB. Triple-negative breast cancer cells 4T1 were divided into 4T1 group
4T1+PMs co-culture group and 4T1+L-PMs co-culture group. Flow cytometry was adopted to detect the apoptotic rate and cell cycle. Transwell invasion assay was used to measure the invasion ability of the cells.
Results
2
Compared with the PMs group
the expression of IL-10
CD206 and PGC-1α was increased (
P
<
0.05)
and that of TNF-α
CD86 and miR-382 was decreased (
P
<
0.05)
transcriptional activity of NF-κB was reduced (
P
<
0.05) in the TAMs group; While in the L-TAMs
the results were totally opposite to those in the PMs group (
P
<
0.05). Compared with the 4T1 group
the invasive ability of 4T1+PMs group was increased (
P
<
0.05) and the apoptotic rate was decreased (
P
<
0.05)
while the invasive ability was lowered (
P
<
0.05) and the apoptotic rate was enhanced (
P
<
0.05) in the 4T1+L-PMs group.
Conclusion
2
TAMs inhibit the invasion and proliferation of triple-negative breast cancer by regulating the expression of miR-382
which may be related to the inhibition of the expression of PGC-1α by miR-382
the transcriptional activity of NF-κB and the inhibition of M2 differentiation of TAMs.
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