球形脂联素对胰岛β细胞胰岛素分泌和凋亡的影响

被引:10
作者
王适龙
钟惠菊
盛杰
王静
机构
[1] 中南大学湘雅医院内分泌科
关键词
脂联素; 胰岛细胞; 解偶联蛋白2; 过氧化物酶体激增剂激活受体; 凋亡;
D O I
暂无
中图分类号
R587.1 [糖尿病];
学科分类号
100201 [内科学];
摘要
目的观察脂联素对胰岛β细胞胰岛素分泌、UCP-2、PPARγmRNA表达和凋亡的影响。方法大鼠胰岛细胞株RIN-m5F分别用5.6mmol/L和16.7 mmol/L葡萄糖,并加入不同浓度的球形脂联素(0~2500μg/L)培养48 h。放免法测定胰岛素含量,RT-PCR检测UCP-2、PPARγmRNA的表达。流式细胞仪检测细胞凋亡率,Western Blot检测激活型Caspase3的表达。结果高糖培养下脂联素同时干预后基础胰岛素分泌显著降低,高糖刺激的胰岛素分泌显著增加。和高糖组比较,脂联素组UCP-2、PPARγmRNA的表达显著降低(P<0.05),细胞凋亡率和激活型Caspase-3的表达显著降低(P<0.05)。结论脂联素能改善高糖所致的β细胞胰岛素分泌异常,其机制可能与通过下调PPARγ降低UCP-2的表达有关。脂联素可拮抗高糖所致的β细胞凋亡。
引用
收藏
页码:930 / 933
页数:4
相关论文
共 7 条
[1]
解偶联蛋白2在高糖致大鼠胰岛β细胞功能障碍中的作用 [J].
任冬月 ;
赵晓娟 .
中国医科大学学报, 2007, (03) :293-294+297
[2]
Adiponectin induces insulin secretion in vitro and in vivo at a low glucose concentration[J] M. Okamoto;M. Ohara-Imaizumi;N. Kubota;S. Hashimoto;K. Eto;T. Kanno;T. Kubota;M. Wakui;R. Nagai;M. Noda;S. Nagamatsu;T. Kadowaki Diabetologia 2008,
[3]
Adiponectin as an anti-inflammatory factor[J] Noriyuki Ouchi;Kenneth Walsh Clinica Chimica Acta 2007,
[4]
Globular adiponectin augments insulin secretion from pancreatic Islet β cells at high glucose concentrations[J] Weiqiong Gu;Xiaoying Li;Changqin Liu;Jun Yang;Lei Ye;Jingfen Tang;Yuanjun Gu;Yisheng Yang;Jie Hong;Yifei Zhang;Mingdao Chen;Guang Ning Endocrine 2006,
[5]
Adiponectin Is Functionally Active in Human Islets but Does Not Affect Insulin Secretory Function or β-Cell Lipoapoptosis[J] K Staiger;N Stefan;H Staiger;M D. Brendel;D Brandhorst;R G. Bretzel;F Machicao;M Kellerer;M Stumvoll;A Fritsche;H -U. Häring The Journal of Clinical Endocrinology & Metabolism 2005,
[6]
PPAR-γ overexpression selectively suppresses insulin secretory capacity in isolated pancreatic islets through induction of UCP-2 protein[J] Eisuke Ito;Sachihiko Ozawa;Kazuto Takahashi;Toshiaki Tanaka;Hidenori Katsuta;Shinya Yamaguchi;Masahiro Maruyama;Makoto Takizawa;Hiroshi Katahira;Katsuhiko Yoshimoto;Shinya Nagamatsu;Hitoshi Ishida Biochemical and Biophysical Research Communications 2004,
[7]
Adiponectin counteracts cytokine- and fatty acid-induced apoptosis in the pancreatic beta-cell line INS-1[J] I. Rakatzi;H. Mueller;O. Ritzeler;N. Tennagels;J. Eckel Diabetologia 2004,