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癌症与分子诊断研究
(
网络版
), 2012
,
1
,
1
-
6
Aizheng Yu Fenzi Zhenduan Yanjiu (Online), 2012, Vol.1, 1
-
6
http://cmdr.5th.sophiapublisher.com
1
研究报告
Research Report
染色质改构因子
BRG1
降低
UV
照射引起的细胞凋亡
王晓光
1
,
王蕊
2
,
王玲
2
,
曾宪录
2
1
长春师范学院生命科学学院
,
长春
, 130032;
2
东北师范大学遗传与细胞研究所
,
长春
, 130024
通讯作者
: zengx779@nenu.edu.cn;
作者
癌症与分子诊断研究
, 2012
,
1
,
1
doi: 10.5376/cmdr.cn.2012.01.0001
收稿日期:
2012
03
12
接受日期:
2012
05
18
发表日期:
2012
05
29
本文首次发表在《基因组学与医学生物学》
(2012
年第
31
卷第
1
1-6
)
上。现依据版权所有人授权的许可协议,采用
Creative Commons Attribution
License
协议对其进行授权,再次发表与传播。只要对原作有恰当的引用
,
版权所有人允许并同意第三方无条件的使用与传播。
建议最佳引用格式:
引用格式
(
中文
)
王晓光等
, 2012,
染色质改构因子
BRG1
降低
UV
照射引起的细胞凋亡
,
癌症与分子诊断研究
(online) Vol.1 No.1 pp.1-6 (doi: 10.5376/cmdr.cn. 2012.
01.0001)
引用格式
(
英文
)
Wang et al., 2012, The Chromatin Remodeling Factor BRG1 Reduces Cell Apoptosis Induced by UV Radiation, Aizheng Yu Fenzi Zhenduan Yanjiu
(online) (Cancer and Molecular Diagnosis Research) Vol.1 No.1 pp.1-6 (doi: 10.5376/cmdr.cn.2012.01.0001)
生命体的遗传物质基础是
DNA
分子,多种因素可以作用于细胞内的
DNA
分子,导致多种类型的
DNA
损伤。若
受损的
DNA
得不到及时和有效的修复,细胞将走向凋亡或发生变异。染色质改构复合物
(chromatin remodeling complex)
在基
因表达调控、
DNA
复制等方面扮演着重要角色。依赖
ATP
的染色质改构复合物
SWI
SNF
的核心亚基
Brahma Related Gene1
(Brg1)
在染色质结构调整、基因转录调控等多个细胞进程中具有重要作用,仅有有限的文献报道
BRG1
参与到
DNA
的损伤
修复过程。因此,进一步研究与验证
BRG1
在调控
DNA
的损伤修复进而挽救细胞凋亡中的作用十分重要。本文通过利用不
同强度的
UV
照射检测细胞凋亡的情况,初步建立了
DNA
损伤修复的实验体系。将
BRG1
表达质粒瞬时转染到
SW13
(BRG1-/-)
细胞系中,并利用
30 J/m2
UV
照射,分别在
0 h
6 h
24 h
检测细胞早期凋亡程度。结果表明,
SW13 (BRG1-/-)
细胞中瞬时表达
BRG1
可以明显降低由
UV
照射引起的细胞凋亡,其中
UV
照射后
24 h
的细胞表现最明显。我们进一步在
HeLa
细胞中通过瞬时表达
BRG1
验证了上述结果。由于
BRG
通过染色质改构在基因的转录调控、复制和重组等方面起着
重要的作用,我们推测
BRG1
可能通过染色质改构参与了
DNA
的损伤修复过程,进而影响了细胞凋亡。
关键词
BRG1; UV
照射
; DNA
损伤修复
;
细胞凋亡
;
染色质改构
The Chromatin Remodeling Factor BRG1 Reduces Cell Apoptosis Induced by
UV Radiation
Wang Xiaoguang
1
, Wang Rui
2
, Wang Ling
2
, Zeng Xianlu
2
1 College of Life Sciences, Changchun Normal University, Changchun, 130032;
2 Institute of Genetics and Cytology, Northeast Normal University, Changchun, 130024
Corresponding author: zengx779@nenu.edu.cn;
Authors
Abstract
DNA molecules are the basis of the genetic material of lives, a variety of factors act on the DNA molecules within of cells
leading to various types of DNA damage. If damaged DNA is not timely and effective repaired, the cell would go toward apoptosis or
variation. Chromatin Remodeling Complex plays an important role in the regulation of gene expression and DNA replication.
Brahma Related Gene1 (Brg1), a core subunit of the ATP-dependent chromatin remodeling complex SWI / SNF, plays an important
role in adjustment of the chromatin structure, regulation of gene transcription and other cellular processes. It was limited literature to
report that BRG1 involved in the process of DNA damage repairing. Therefore, it would be very important to further study and verify
the roles of BRG1 in the regulation of DNA damage repairing to rescue the cell apoptosis. In this research, DNA damage repairing
model was preliminary established by detecting the cell apoptosis induced with the different intensity of UV radiation. The BRG1
expression plasmids were transiently transfected into SW13 (BRG1-/-) cell lines, and then were exposed under 30 J/m2 of UV
irradiation. We detected the degree of the early cell apoptosis for 0h, 6 h and 24 h, respectively. The results showed that the
BRG1transient expressed in the SW13 (BRG1-/-) cells can significantly reduce cell apoptosis caused by UV irradiation, in which the
cells exposed for 24 h after UV irradiation would be the most obvious working. The above results were verified by transiently
expressing the BRG1 gene in the HeLa cells. Because BRG plays an important role by chromatin remodeling in regulation of gene
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