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论文摘要

降钙素基因相关肽对MC3T3-E1成骨细胞氧化损伤的保护作用研究

Protective effect of calcitonin gene-related peptide against oxidative damage in MC3T3-E1 osteoblasts

作者:郭俊峰,张慧宇,张纲,安洋,杨阳,王飞,谭颖徽

Author:Guo Junfeng, Zhang Huiyu, Zhang Gang, An Yang, Yang Yang, Wang Fei, Tan Yinghui

收稿日期:2016-02-16          年卷(期)页码:2016,34(6):584-584-588

期刊名称:华西口腔医学杂志

Journal Name:West China Journal of Stomatology

关键字:人牙周膜干细胞, 淫羊藿苷, 增殖, 分化, 纳米羟磷灰石,降钙素基因相关肽,成骨细胞,氧化损伤,超氧化物歧化酶,活性氧,

Key words:human periodontal ligament stem cells, Icariin,proliferation,differentiation,nano-hydroxyapatite ,calcitonin gene-related peptide,osteoblasts,oxidative damage,superoxide dismutase,reactive oxygen species,

基金项目:国家自然科学基金资助(81371110)

中文摘要

目的 探讨降钙素基因相关肽(CGRP)对MC3T3-E1成骨细胞氧化损伤的保护作用及其潜在机制。方法1)构建细胞氧化损伤模型,将实验分为4组,H2O2组使用含不同浓度(10-1、10-2、10-3、10-4、10-5 mol·L-1)H2O2的培养液,CGRP+H2O2组使用含不同浓度(10-6、10-7、10-8、10-9、10-10 mol·L-1)CGRP的培养液预处理后再加入含10-4 mol·L-1 H2O2的培养液,对照组为常规培养液,空白组不接种细胞。培养12、24、36、48 h后,CCK-8法检测细胞增殖活性,筛选最佳建模浓度和CGRP对成骨细胞氧化损伤的最佳保护浓度。2)采用含10-4 mol·L-1 H2O2(H2O2组)、10-8 mol·L-1 CGRP(CGRP组)的培养液和10-8 mol·L-1 CGRP+10-4 mol·L-1 H2O2培养液(CGRP+H2O2组)、常规培养液(对照组)培养成骨细胞,测定超氧化物歧化酶(SOD)的活性、活性氧(ROS)的含量以及炎症因子肿瘤坏死因子(TNF)-α、白细胞介素(IL)-1β、IL-6的水平。结果 1)在10-4 mol·L-1 H2O2时细胞增殖开始出现抑制(P-8 mol·L-1 CGRP预处理后细胞增殖活性最高,与只加入10-4 mol·L-1 H2O2有统计学差异(P2O2组相比,CGRP+H2O2组SOD活性升高(PPP2O2会对MC3T3-E1成骨细胞造成氧化损伤,CGRP对MC3T3-E1成骨细胞氧化损伤具有保护作用。

英文摘要

Objective This study aimed to observe the protective effect of calcitonin gene-related peptide (CGRP), as well as its potential mechanism, against oxidative damage in MC3T3-E1 osteoblasts. Methods 1) MC3T3-E1 osteoblasts were treated with different hydrogen peroxide (H2O2) concentrations (10-1, 10-2, 10-3, 10-4, and 10-5mol·L-1) for 12, 24, 36, and 48 h to build an oxidative damage model, to determine cell proliferation activity in each group by using CCK-8 assay, and to determine the optimal modeling concentration. MC3T3-E1 osteoblasts were pretreated for 1 h with different CGRP concentrations (10-6, 10-7, 10-8, 10-9, and 10-10mol·L-1) followed by treatment with H2O2(10-4mol·L-1). After 12, 24, 36, and 48 h, the CGRP expression and activity of osteoblasts were detected using the CCK-8 method to determine the optimal CGRP concentration that provides the best protective effect against oxidative damage. 2) Superoxide dismutase (SOD) activity, reactive oxygen species (ROS) content, and the levels of the inflammatory cytokines tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 of the groups treated with CGRP, H2O2, CGRP+H2O2were determined. Results 1) Compared with the control group, treatment with 10-4mol·L-1H2O2significantly started to inhibite the proliferation of osteoblasts (P-4mol·L-1H2O2group, pretreatment with 10-8mol·L-1CGRP significantly increased the proliferation of osteoblasts (P2O2group, CGRP+H2O2group significantly increased the SOD activity (PPP2O2can cause oxidative damage to MC3T3-E1 osteoblasts, whereas CGRP exerts protective effect against oxidative damage in MC3T3-E1 osteoblasts.

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