《癌症》
Chinese Journal of Cancer
,
2007
,
26
(
11
) :
1211- 1214
・基础研究・
华中科技大学同济医学院
附属协和医院妇产科,
湖北 武汉
430022
Department of Gynecology and
Obstetrics
,
Union Hospital
,
Tongji Medical College
,
Huazhong University of Science
and Technology
,
Wuhan
,
Hubei
,
430022
,
P. R. China
通讯作者: 刘
义
Correspondence to
:
LIU Yi
Tel
:
86- 27- 85351614
E-mail
:
liqun94@163.com
收稿日期:
2007-04-17
修回日期:
2007-05-29
细胞外信号调节激酶 1 /2 在瘦素促进子宫内膜癌
Is hikawa
细胞增殖中的作用
龚 成,
刘 义,
肖 维,
尹 婕,
王冬花,
盛 慧
The Role of ERK1 /2 in Leptin Promoting the Proliferation
of Human Endometrial Cancer Cell Line Ishikawa
GONG Cheng
,
LIU Yi
,
XIAO Wei
,
YIN J ie
,
WANG Dong -Hua
,
SHENG Hui
[
ABSTRACT
]
BACKGROUND & OBJ ECTIVE
:
Epidemiologic s tudies s howed
that leptin is clos ely related to the tumorigenes is of endometrial cancer
,
but the
mechanis m is unclear.
As a mitogenic agent
,
leptin can promote the
proliferation of many kinds of cells .
This s tudy was to explore the role of
extracellular s ignal-regulated kinas e 1 /2
(
ERK1 /2
)
in leptin promoting the
proliferation of human endometrial cancer cell line Is hikawa. METHODS
:
The
expres s ion of leptin receptor OB-Rb in Is hikawa cells was detected by
fluoroimmunoas s ay.
Is hikawa cells were treated by leptin at various
concentrations
(
0
,
10
,
50
,
100
,
and 150 ng /ml
)
for different time
(
6
,
12
,
and
24 h
)
. Cell proliferation was examined by MTT as s ay. Meanwhile
,
the effect of
PD98059
,
s elective inhibitor of ERK1 /2
,
on the proliferation of Is hikawa cells
induced by leptin was als o s tudied. Is hikawa cells were treated with 100 ng /ml
leptin for different time
(
20
,
40
,
and 60 min
) ,
then the levels of
phos phorylated ERK1 /2
(
p-ERK1 /2
)
and ERK1 /2 were examined by Wes tern
blot.
RESULTS
:
Fluoroimmunoas s ay s howed the pres ence of OB-Rb in
Is hikawa cells . Leptin s timulated the proliferation of Is hikawa cells . This effect
was maximal at 100 ng /ml after 24-hour treatment
,
and there was no
s ignificant difference between 100 ng /ml group and 150 ng /ml group
(
P =
0.129
)
.
Blocking ERK1 /2 phos phorylation by PD98059 s ignificantly reduced
the proliferation of Is hikawa cells s timulated by leptin. When treaded with 100
ng /ml Leptin and 100 μmol/L PD98059 for 24 h
,
cell proliferation rate was
(
6.88±0.86
)
%. ERK1 /2 phos phorylation was enhanced s ignificantly in Is hikawa
cells after treatment of 100 ng /ml leptin. CONCLUSION
:
Leptin may promote
the proliferation of endometrial cancer Is hikawa cells by activating ERK1 /2
s ignaling pathway.
KEYWORDS
:
Endometrial neoplas m
;
Leptin
;
Signal-regulated kinas e
;
Is hikawa cell
;
Proliferation
【摘
要 】 背 景 与 目 的 : 流 行 病 学 研 究 提 示 瘦 素 与 子 宫 内 膜 癌 的 发 生 有 关 , 但 其
作用机制尚 不清楚。瘦素作为促有丝分裂原, 能够显著促进多种细胞的生长增殖。
本 研 究 的 目 的 在 于 探 讨 细 胞 外 信 号 调 节 激 酶
1 /2
(
extracellular signal-regulated
kinase 1 /2
,
ERK1 /2
)
在瘦素促进子宫内膜癌细胞增殖中的 作用。方法: 免疫荧光染
色 检 测
Ishikawa
细 胞 中 瘦 素 受 体 的 表 达 ; 于
Ishikawa
细 胞 中 分 别 加 入 不 同 浓 度 的
瘦 素 (
0
、
10
、
50
、
100
、
150 ng /ml
) ,
作 用 不 同 时 间 (
6
、
12
、
24 h
) ,
MTT
法 检 测 各 组 细
胞 的 增 殖 情 况 ; 同 时 应 用
ERK1 /2
激 酶 特 异 性 抑 制 剂
PD98059
阻 断
ERK1 /2
磷 酸
化 , 观 察 其 对 瘦 素 促 进
Ishikawa
细 胞 增 殖 的 影 响 ; 应 用 免 疫 印 迹 技 术 检 测
100 ng /
ml
瘦 素 作 用 于
Ishikawa
细 胞 不 同 时 间 后 (
20
、
40
、
60 min
)
ERK1 /2
的 活 化 水 平 ( 以
p-ERK1 /2
与
ERK1 /2
的 比 值 表 示 ) 。 结 果 : 免 疫 荧 光 检 测 结 果 证 实
Ishikawa
细 胞
存在瘦素受体的表达; 瘦素能明显 促进
Ishikawa
细胞的增殖, 在
0~100 ng /ml
范围
内瘦素浓度越高, 细 胞 增 殖 越 显 著 ,
100 ng /ml
瘦 素 作 用
24 h
其 增 殖 效 应 最 大 (
A
1211