內(nèi)皮細胞條件培養(yǎng)液IL-6對血管平滑肌細胞增殖和分泌的影響
發(fā)布時間:2018-09-12 09:26
【摘要】:目的:探討內(nèi)皮細胞活化對血管平滑肌細胞增殖及分泌的的影響及其中機制。 方法:(1)以不同濃度和不同干預(yù)時間的TNF-α刺激人臍靜脈內(nèi)皮細胞(HUVEC),收集細胞上清液,用ELISA法測定內(nèi)皮細胞IL-6的分泌,TUNEL法檢測內(nèi)皮細胞的凋亡;(2) HUVEC培養(yǎng)液中分別加入10ng/mlTNF-α或不加入TNF-α24h后,收集上清離心,用0.22um的微孔濾膜過濾,4℃保存?zhèn)溆?分別為A液和B液;(3)將臍靜脈平滑肌細胞接種于培養(yǎng)板中分為4組:①刺激組:按1:1比例加入A液和DMEM培養(yǎng)液,②拮抗組:在刺激組基礎(chǔ)上加入抗IL-6單抗,③對照組:按1:1比例加入B液和DMEM培養(yǎng)液,④空白組:僅加入DMEM培養(yǎng)液。分組后立即采集少量細胞上清液以ELISA法測定ICAM-1、 IL-8水平。繼續(xù)培養(yǎng)24h后,再次采集上清液測定ICAM-1和IL-8水平,并收集血管平滑肌細胞以MTT法檢測平滑肌細胞增殖的情況。 結(jié)果:1、TNF-α對血管內(nèi)皮細胞分泌和凋亡的影響:(1) TNF-α濃度和作用時間對血管內(nèi)皮細胞分泌IL-6的影響:課題對照組:(31.2±2.9) pg/ml、5ng/ml組:(95.4±4.9) pg/ml、10ng/ml組:(122.7±6.3) pg/ml、20ng/ml組:(132.5±7.1) pg/ml、40ng/ml組:(79.1±5.9) pg/ml;時間效應(yīng):對照組:(12.4±1.6) pg/ml、6h組:(79.3±5.5) pg/ml、12h組:(97.5±3.9) pg/ml、24h組:(122.7±6.3) pg/ml、48h組:(108.0±4.4) pg/ml;(2) TNF-α對血管內(nèi)皮細胞凋亡的影響各時間點細胞凋亡指數(shù)測定:對照組:(0.029±0.004)、12h組:(0.140±0.005)、24h組:(0.255±0.006)、48h組:(0.329±0.013)。2、內(nèi)皮細胞條件培養(yǎng)液對平滑肌細胞增殖和分泌的影響:(1)內(nèi)皮細胞條件培養(yǎng)液對平滑肌細胞增殖的影響:四組細胞的OD值依次為(1.349±0.115)、(1.176±0.093)、(1.012±0.087)和(0.798±0.014),組間比較有顯著性差異(F=22.315,P0.05);(2)內(nèi)皮細胞條件培養(yǎng)液對平滑肌細胞分泌的影響:四組細胞上清液中ICAM-1和IL-8均較基線值有所增加,其中刺激組ICAM-1和IL-8分別較基線升高(0.222±0.044) ng/ml和(2.996±0.059) ng/ml,均高于拮抗劑組、對照組和空白組(P0.05)。 結(jié)論:TNF-α誘導(dǎo)內(nèi)皮細胞活化,通過刺激IL-6釋放,促進血管平滑肌細胞增殖和ICAM-1和IL-8等細胞因子的分泌。
[Abstract]:Aim: to investigate the effect of endothelial cell activation on proliferation and secretion of vascular smooth muscle cells and its mechanism. Methods: (1) the supernatant of human umbilical vein endothelial cells (HUVEC),) was collected by TNF- 偽 stimulation with different concentration and different intervention time. ELISA assay was used to detect the secretion of IL-6 in endothelial cells and Tunel method was used to detect the apoptosis of endothelial cells. (2) after 10 ng / ml TNF- 偽 or no TNF- 偽 was added to the HUVEC medium for 24 hours, the supernatant was collected and centrifuged, and then stored at 4 鈩,
本文編號:2238593
[Abstract]:Aim: to investigate the effect of endothelial cell activation on proliferation and secretion of vascular smooth muscle cells and its mechanism. Methods: (1) the supernatant of human umbilical vein endothelial cells (HUVEC),) was collected by TNF- 偽 stimulation with different concentration and different intervention time. ELISA assay was used to detect the secretion of IL-6 in endothelial cells and Tunel method was used to detect the apoptosis of endothelial cells. (2) after 10 ng / ml TNF- 偽 or no TNF- 偽 was added to the HUVEC medium for 24 hours, the supernatant was collected and centrifuged, and then stored at 4 鈩,
本文編號:2238593
本文鏈接:http://sikaile.net/xiyixuelunwen/2238593.html
最近更新
教材專著