Page 10 - 南京医科大学自然版
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敲降组则显著升高(图1G、H)。流式细胞术分析显 低。以上结果表明,RBMS3在体外和体内均能抑制
示:RBMS3 过表达可诱导 MDA⁃MB⁃231 和 SUM⁃ 乳腺癌细胞增殖。
1315 细胞 G0/G1 期阻滞(图 2A~D)并显著提高细胞 2.2 RBMS3上调乳腺癌细胞中p21的表达
凋亡率(图2E~H)。裸鼠异种移植瘤模型结果显示: 基于前期转录组测序数据的GO功能富集分析
RBMS3 过表达组的肿瘤生长速度显著慢于对照组 显示,RBMS3 表达与细胞增殖负向调控密切相关
(图1I),且肿瘤体积(图1J)与质量(图1K)均显著降 (图 3A),与 RBMS3 诱导细胞周期阻滞的实验结果
A NC RBMS3 B C SCR Sh1 Sh2 D
NC SCR
150 ** RBMS3 ** Sh1
SUM⁃1315 Colony number 100 *** SUM⁃1315 Colony number 200 ** *** Sh2
150
**
50
100
MDA⁃MB⁃231 SUM⁃1315 MDA⁃MB⁃231 50 0 SUM⁃1315 MDA⁃MB⁃231
0
MDA⁃MB⁃231
E F
SUM⁃1315 MDA⁃MB⁃231
(%) NC
DAPI EdU Merge DAPI EdU Merge 60 RBMS3
Rate of EdU positive cells 20
NC NC 40 ** ***
RBMS3 RBMS3 0 SUM⁃1315 MDA⁃MB⁃231
G SUM⁃1315 MDA⁃MB⁃231 H
DAPI EdU Merge DAPI EdU Merge
(%) SCR
Sh1
SCR SCR 80 *** ***
Rate of EdU positive cells 40
***
Sh2
***
60
Sh1 Sh1 20 0
Sh2 Sh2 SUM⁃1315 MDA⁃MB⁃231
(mm 3 ) 2 000 NC ** NC (g) 1.5
I J K **
RBMS3
1 500
Tumor volumn 1 000 0 *** RBMS3 Tumor weight 0.5 0
1.0
500
5
0
10 15 21
Time(d) NC RBMS3
A-D:Colony formation assay was performed to evaluate the colony⁃forming ability of SUM⁃1315 and MDA⁃MB⁃231 cells after overexpression(A,
B)or knockdown of RBMS3(C,D)(n=3). E-H:EdU incorporation assay was used to detect cell proliferation after overexpression(E,F)or knockdown
of RBMS3(G,H)(scale bar=200 μm)(n=3). I-K:In the SUM⁃1315 xenograft tumor model in nude mice,tumor volume was dynamically monitored in
the RBMS3 overexpression group and the control group. Tumors were dissected,photographed,and weighed at the experimental endpoint(21 days after
**
cell inoculation)(n=6). P < 0.01 and *** P < 0.001.
图1 RBMS3抑制乳腺癌细胞增殖
Figure 1 RBMS3 inhibited the proliferation of breast cancer cells

