萬(wàn) 強(qiáng),劉中勇
·論著·
·中醫(yī)·中西醫(yī)結(jié)合研究·
丹參酮ⅡA對(duì)脂質(zhì)運(yùn)載蛋白2誘導(dǎo)人臍靜脈內(nèi)皮細(xì)胞損傷的影響研究
萬(wàn) 強(qiáng),劉中勇
目的 探討丹參酮ⅡA對(duì)脂質(zhì)運(yùn)載蛋白2(LCN-2)誘導(dǎo)人臍靜脈內(nèi)皮細(xì)胞(HUVEC)損傷的保護(hù)作用及其與細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2(ERK1/2)信號(hào)轉(zhuǎn)導(dǎo)通路的關(guān)系。方法 2015年3—5月將HUVEC分為不同濃度組:分別以0、5、10、20 μmol/L LCN-2作用HUVEC 48 h;不同作用時(shí)間組:分別以10 μmol/L LCN-2作用HUVEC 0、12、24、48 h;不同藥物干預(yù)組:對(duì)照組(未做任何處理)、LCN-2組(LCN-2 10 μmol/L刺激48 h)、LCN-2+丹參酮ⅡA組(10 μmol/L丹參酮ⅡA預(yù)處理HUVEC 1 h后再加10 μmol/L LCN-2刺激48 h)、LCN-2+PD98059組〔PD98059(終濃度20 μmol/L)預(yù)處理HUVEC 30 min后再加10 μmol/L LCN-2刺激48 h〕。采用四甲基偶氮唑鹽比色法(MTT法)檢測(cè)細(xì)胞增殖〔吸光度(A值)〕,流式細(xì)胞術(shù)檢測(cè)細(xì)胞凋亡,酶聯(lián)免疫吸附試驗(yàn)(ELISA)法檢測(cè)上清液中白介素6(IL-6)、單核細(xì)胞趨化蛋白1(MCP-1)表達(dá)水平,Western blotting法檢測(cè)HUVEC中B淋巴細(xì)胞癌2(Bcl-2)、Bcl-2相關(guān)X蛋白(Bax)、磷酸化細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2(p-ERK1/2)表達(dá)水平。結(jié)果 與0 μmol/L組和5 μmol/L組比較,10 μmol/L組、20 μmol/L組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平升高(P<0.05);與10 μmol/L組比較,20 μmol/L組IL-6、MCP-1表達(dá)水平升高(P<0.05)。與0 h組比較,24 h組MCP-1表達(dá)水平升高(P<0.05);與0 h組和24 h組比較,48 h組、72 h組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平升高(P<0.05);與48 h組比較,72 h組IL-6表達(dá)水平升高,Bcl-2、p-ERK1/2表達(dá)水平下降(P<0.05)。與對(duì)照組比較,LCN-2組、LCN-2+丹參酮ⅡA組、LCN-2+PD98059組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax表達(dá)水平升高,LCN-2組及LCN-2+丹參酮ⅡA組p-ERK1/2表達(dá)水平升高(P<0.05);與LCN-2組比較,LCN-2+丹參酮ⅡA組、LCN-2+PD98059組A值、Bcl-2表達(dá)水平升高,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平下降(P<0.05);與LCN-2+丹參酮ⅡA組比較,LCN-2+PD98059組A值、p-ERK1/2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、Bax表達(dá)水平升高(P<0.05)。結(jié)論 丹參酮ⅡA可通過(guò)抑制ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路,減輕LCN-2誘導(dǎo)的HUVEC損傷。
丹參酮ⅡA;脂籠蛋白質(zhì)類;細(xì)胞外信號(hào)調(diào)節(jié)MAP激酶類;人臍靜脈內(nèi)皮細(xì)胞
萬(wàn)強(qiáng),劉中勇.丹參酮ⅡA對(duì)脂質(zhì)運(yùn)載蛋白2誘導(dǎo)人臍靜脈內(nèi)皮細(xì)胞損傷的影響研究[J].中國(guó)全科醫(yī)學(xué),2016,19(9):1086-1090.[www.chinagp.net]
Wan Q,Liu ZY.Effect of tanshinone ⅡA on human umbilical vein endothelial cell injury induced by lipocalin-2[J].Chinese General Practice,2016,19(9):1086-1090.
脂質(zhì)運(yùn)載蛋白2(lipocalin-2,LCN-2)又名中性粒細(xì)胞明膠酶脂質(zhì)運(yùn)載蛋白(neutrophil gelatinase-associated lipocalin,NGAL),是一種新型脂肪細(xì)胞因子。內(nèi)皮細(xì)胞損傷、凋亡是動(dòng)脈粥樣硬化(atherosclerosis,AS)進(jìn)程的起始階段[1]。研究表明,LCN-2可引起內(nèi)皮細(xì)胞損傷從而促進(jìn)AS形成[2]。丹參酮ⅡA(tanshinone ⅡA)為唇形科植物丹參的主要脂溶性成分,研究表明,丹參酮ⅡA可從多種途徑發(fā)揮抗AS效應(yīng)[3],但其機(jī)制尚未完全闡明。本實(shí)驗(yàn)以人臍靜脈內(nèi)皮細(xì)胞(human umbilical vein endothelial cells,HUVEC)為模型,加用丹參酮ⅡA及細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2(extracellular signal-regulated protein kinase 1/2,ERK1/2)信號(hào)轉(zhuǎn)導(dǎo)通路特異性阻滯劑PD98059,觀察丹參酮ⅡA對(duì)LCN-2誘導(dǎo)HUVEC損傷的影響,并探討其抗AS機(jī)制。
1.1 細(xì)胞與主要試劑 2015年3—5月,HUVEC購(gòu)于Cascade Biologics公司,丹參酮ⅡA(純度≥98%)、二甲基亞砜(DMSO)購(gòu)于美國(guó)Sigma公司,胎牛血清購(gòu)于杭州四季青生物工程材料有限公司,DMEM培養(yǎng)基購(gòu)于美國(guó)Gibco公司,LCN-2購(gòu)于美國(guó)Acrobiosystems公司,PD98059購(gòu)于美國(guó)Tocris Bioscience公司,Annexin V-FITC試劑盒購(gòu)于美國(guó)Bio Vision公司,白介素6(IL-6)、單核細(xì)胞趨化蛋白1(MCP-1)酶聯(lián)免疫吸附試驗(yàn)(ELISA)試劑盒購(gòu)于美國(guó)eBioscience公司,B淋巴細(xì)胞癌2(Bcl-2)抗體、Bcl-2相關(guān)X蛋白(Bax)抗體、磷酸化細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2(p-ERK1/2)抗體購(gòu)于美國(guó)Cell Signal Technology公司。
1.2 主要儀器 恒溫細(xì)胞培養(yǎng)箱、超凈臺(tái)、低溫高速離心機(jī)、酶標(biāo)儀購(gòu)于美國(guó)Thermo公司,全自動(dòng)生化儀購(gòu)于美國(guó)Beckman公司,熒光倒置顯微鏡購(gòu)于日本奧林巴斯公司,流式細(xì)胞儀購(gòu)于美國(guó)ACEA Biosciences公司,電泳儀購(gòu)于美國(guó)Bio-Rad公司。
1.3 研究方法
1.3.1 細(xì)胞分組及處理 將HUVEC分為不同濃度組:分別以0、5、10、20 μmol/L LCN-2作用HUVEC 48 h[4]。不同作用時(shí)間組:分別以10 μmol/L LCN-2作用HUVEC 0、12、24、48 h。不同藥物干預(yù)組:(1)對(duì)照組(未做任何處理);(2)LCN-2組:LCN-2 10 μmol/L刺激48 h;(3)LCN-2+丹參酮ⅡA組:10 μmol/L丹參酮ⅡA[5]預(yù)處理HUVEC 1 h后再加10 μmol/L LCN-2刺激48 h;(4)LCN-2+PD98059組:PD98059(終濃度20 μmol/L[5])預(yù)處理HUVEC 30 min后再加10 μmol/L LCN-2刺激48 h。
1.3.2 四甲基偶氮唑鹽比色法(MTT法)檢測(cè)細(xì)胞增殖 HUVEC以1×104/孔接種于96孔板,24 h后撤去血清,分組見(jiàn)1.3.1,每組設(shè)6個(gè)復(fù)孔。干預(yù)完成后以20 μl MTT (5 g/L)37 ℃孵育4 h,每孔加DMSO 150 μl低速振蕩10 min使結(jié)晶物溶解,酶標(biāo)儀測(cè)570 nm處吸光度(A值)。
1.3.3 流式細(xì)胞術(shù)檢測(cè)細(xì)胞凋亡 HUVEC以2×105/孔接種于12孔板,24 h后換無(wú)血清培養(yǎng)液,培養(yǎng)24 h,分組見(jiàn)1.3.1,每組設(shè)6個(gè)復(fù)孔。收集細(xì)胞,加Annexin V-FITC及碘化丙啶(PI)雙染,流式細(xì)胞術(shù)檢測(cè)細(xì)胞凋亡率。
1.3.4 ELISA法檢測(cè)IL-6、MCP-1表達(dá)水平 取對(duì)數(shù)生長(zhǎng)期的HUVEC以1×105/ml接種于培養(yǎng)皿,分組見(jiàn)1.3.1,每組設(shè)6個(gè)復(fù)孔。收集上清液,ELISA法檢測(cè)上清液中IL-6、MCP-1表達(dá)水平,操作步驟參照說(shuō)明書(shū)。
1.3.5 Western blotting法檢測(cè)Bcl-2、Bax、p-ERK1/2表達(dá)水平 分組見(jiàn)1.3.1,每組設(shè)6個(gè)復(fù)孔,提取HUVEC總蛋白,BCA法測(cè)定蛋白濃度,每孔取上清液20 μl加上樣緩沖液,100 ℃加熱5 min。凝膠電泳轉(zhuǎn)膜至聚偏氟乙烯(PVDF)膜,5%脫脂奶粉室溫封閉1 h,一抗(1∶1 000)4 ℃過(guò)夜,二抗(1∶2 000)室溫孵育1 h,ECL系統(tǒng)顯色,以β-actin為內(nèi)參,采用Image Tool 3.0進(jìn)行灰度值分析。
2.1 不同濃度及不同作用時(shí)間LCN-2對(duì)HUVEC的作用 不同濃度組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、Bax、p-ERK1/2表達(dá)水平比較,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);其中與0 μmol/L組和5 μmol/L組比較,10 μmol/L組、20 μmol/L組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平升高,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);與10 μmol/L組比較,20 μmol/L組IL-6、MCP-1表達(dá)水平升高,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05,見(jiàn)表1、圖1)。
不同作用時(shí)間組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、Bax、p-ERK1/2表達(dá)水平比較,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);其中與0 h組比較,24 h組MCP-1表達(dá)水平升高,差異有統(tǒng)計(jì)學(xué)意義(P<0.05);與0 h組和24 h組比較,48 h組、72 h組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平升高,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);與48 h組比較,72 h組IL-6表達(dá)水平升高,Bcl-2、p-ERK1/2表達(dá)水平下降,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05,見(jiàn)表2、圖2)。
2.2 不同藥物干預(yù)對(duì)HUVEC的作用 不同藥物干預(yù)組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、Bax、p-ERK1/2表達(dá)水平比較,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);其中與對(duì)照組比較,LCN-2組、LCN-2+丹參酮ⅡA組、LCN-2+PD98059組A值、Bcl-2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bax表達(dá)水平升高,LCN-2組和LCN-2+丹參酮ⅡA組p-ERK1/2表達(dá)水平升高,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);與LCN-2組比較,LCN-2+丹參酮ⅡA組、LCN-2+PD98059組A值、Bcl-2表達(dá)水平升高,細(xì)胞凋亡率、IL-6、MCP-1、Bax、p-ERK1/2表達(dá)水平下降,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05);與LCN-2+丹參酮ⅡA組比較,LCN-2+PD98059組A值、p-ERE1/2表達(dá)水平下降,細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、Bax表達(dá)水平升高,差異均有統(tǒng)計(jì)學(xué)意義(P<0.05,見(jiàn)表3、圖3)。
表1 不同濃度組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、p-ERK1/2、Bax表達(dá)水平比較
注:A值=吸光度,IL-6=白介素6,MCP-1=單核細(xì)胞趨化蛋白1,Bcl-2=B淋巴細(xì)胞癌2,Bax=Bcl-2相關(guān)X蛋白,p-ERK1/2=磷酸化細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2;與0 μmol/L組比較,aP<0.05;與5 μmol/L組比較,bP<0.05;與10 μmol/L組比較,cP<0.05
表2 不同作用時(shí)間組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、p-ERK1/2、Bax表達(dá)水平比較
注:與0 h組比較,aP<0.05;與24 h組比較,bP<0.05;與48 h組比較,cP<0.05
表3 不同藥物干預(yù)組A值、細(xì)胞凋亡率、IL-6、MCP-1、Bcl-2、p-ERK1/2、Bax表達(dá)水平比較
注:LCN-2=脂質(zhì)運(yùn)載蛋白2;與對(duì)照組比較,aP<0.05;與LCN-2組比較,bP<0.05;與LCN-2+丹參酮ⅡA組比較,cP<0.05
注:p-ERK1/2=磷酸化細(xì)胞外信號(hào)調(diào)節(jié)蛋白激酶1/2,Bax=Bcl-2相關(guān)X蛋白,Bcl-2=B淋巴細(xì)胞癌2
圖1 Western blotting法檢測(cè)不同濃度組Bcl-2、Bax、p-ERK1/2的表達(dá)水平
Figure 1 Levels of Bcl-2,Bax and p-ERK1/2 expression among different concentration groups detected by Western blotting
圖2 Western blotting法檢測(cè)不同作用時(shí)間組Bcl-2、Bax、p-ERK1/2的表達(dá)水平
Figure 2 Levels of Bcl-2,Bax and p-ERK1/2 expression among different time groups detected by Western blotting
注:LCN-2=脂質(zhì)運(yùn)載蛋白2
圖3 Western blotting法檢測(cè)不同藥物干預(yù)組Bcl-2、Bax、p-ERK1/2的表達(dá)水平
Figure 3 Levels of Bcl-2,Bax and p-ERK1/2 expression among different drugintervention groups detected by Western blotting
LCN-2于中性粒細(xì)胞中被發(fā)現(xiàn)并分離,是脂質(zhì)運(yùn)載蛋白家族的2號(hào)成員,相對(duì)分子量約25 kDa,廣泛分布于腎臟、肺臟、肝臟及小腸等多種組織器官中,具有多種生物學(xué)功能,在細(xì)胞的增殖與凋亡及炎性反應(yīng)過(guò)程中起調(diào)節(jié)作用[6]。既往對(duì)LCN-2的研究主要集中在腎臟病、感染性疾病及腫瘤等方面,近年來(lái)研究表明,LCN-2可作為心血管疾病生物標(biāo)志物,獨(dú)立預(yù)測(cè)心血管事件的發(fā)生[7]。AS患者血清LCN-2水平顯著升高,且與AS嚴(yán)重程度呈正相關(guān)[8],LCN-2水平在AS患者不穩(wěn)定粥樣斑塊中亦升高[9],均提示LCN-2與AS形成密切相關(guān)。內(nèi)皮細(xì)胞損傷后釋放的炎性因子可致單核細(xì)胞黏附遷移、中膜平滑肌細(xì)胞增生、泡沫細(xì)胞堆積形成脂質(zhì)斑塊,最終促進(jìn)AS形成[1]。IL-6及MCP-1在AS慢性炎癥中扮演重要角色,對(duì)巨噬細(xì)胞、單核細(xì)胞的遷移和激活起調(diào)控作用,并能促進(jìn)血管平滑肌細(xì)胞(vascular smooth muscle cells,VSMC)增殖,參與AS形成過(guò)程[10]。Bcl-2基因家族蛋白中的促凋亡蛋白Bax和抑凋亡蛋白Bcl-2的比例對(duì)細(xì)胞凋亡起直接調(diào)控作用[11]。Bax可通過(guò)與細(xì)胞外膜的電壓依賴性陰離子通道(voltage dependent anion channel,VDAC)或細(xì)胞內(nèi)膜的腺苷轉(zhuǎn)位因子(adenine nucleotide translocator,ANT)的結(jié)合,介導(dǎo)線粒體膜上的膜通透性孔道的開(kāi)放,促進(jìn)細(xì)胞凋亡,而B(niǎo)cl-2可通過(guò)與Bax競(jìng)爭(zhēng)性結(jié)合ANT,或直接阻止Bax與VDAC、ANT結(jié)合以發(fā)揮其抗凋亡效應(yīng)[12]。本研究結(jié)果顯示,LCN-2可抑制HUVEC增殖、上調(diào)HUVEC內(nèi)Bax/Bcl-2比例,以促進(jìn)HUVEC凋亡、誘導(dǎo)分泌IL-6及MCP-1等從而加重HUVEC損傷。
ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路是絲裂原活化蛋白激酶(mitogen-activated protein kinase,MAPKs)家族分支之一,ERK1/2可通過(guò)一系列級(jí)聯(lián)磷酸化將細(xì)胞外信號(hào)轉(zhuǎn)導(dǎo)至細(xì)胞核內(nèi),調(diào)控HUVEC的多種基因轉(zhuǎn)錄,在構(gòu)建細(xì)胞骨架、維持細(xì)胞形態(tài)、調(diào)節(jié)細(xì)胞增殖及凋亡等生物學(xué)進(jìn)程中起重要作用[13],該信號(hào)轉(zhuǎn)導(dǎo)通路的激活可通過(guò)促進(jìn)VSMC增殖、炎性細(xì)胞浸潤(rùn)等促進(jìn)AS形成[14]。既往研究證實(shí),p-ERK1/2參與了HUVEC中炎性因子表達(dá)的調(diào)控[15]。本研究結(jié)果顯示,LCN-2可呈濃度及作用時(shí)間依賴性誘導(dǎo)HUVEC中p-ERK1/2表達(dá)水平的增加,并誘導(dǎo)分泌炎性因子IL-6及MCP-1,加重HUVEC損傷,提示LCN-2對(duì)HUVEC的損傷作用可能與激活ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路有關(guān)。
丹參酮ⅡA能通過(guò)抗氧化應(yīng)激、抗炎、調(diào)節(jié)血脂、抑制平滑肌細(xì)胞增殖和遷移、減少巨噬細(xì)胞浸潤(rùn)等多種途徑發(fā)揮抗AS效應(yīng)[3,16-17]。研究表明,丹參酮ⅡA的抗AS機(jī)制與抑制ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路密切相關(guān),丹參酮ⅡA可通過(guò)抑制ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路下調(diào)c-fos表達(dá)水平,顯著抑制頸動(dòng)脈球囊損傷大鼠VSMC增殖并減少血管內(nèi)膜增生,從而延緩AS進(jìn)程[18]。但丹參酮ⅡA是否可通過(guò)抑制ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路,減輕LCN-2誘導(dǎo)的HUVEC損傷而抗AS尚不清楚。本研究結(jié)果證實(shí),丹參酮ⅡA及PD98059均可顯著降低HUVEC中p-ERK1/2表達(dá)水平、減輕LCN-2誘導(dǎo)的HUVEC增殖抑制、下調(diào)Bax/Bcl-2比例以抑制HUVEC凋亡、降低IL-6及MCP-1表達(dá)水平,提示丹參酮ⅡA的抗AS機(jī)制可能通過(guò)抑制ERK1/2信號(hào)轉(zhuǎn)導(dǎo)通路,減輕LCN-2誘導(dǎo)的HUVEC損傷得以實(shí)現(xiàn),此發(fā)現(xiàn)有望為丹參酮ⅡA在AS防治中的應(yīng)用提供新依據(jù)。丹參酮ⅡA對(duì)LCN-2抑制HUVEC增殖、誘導(dǎo)HUVEC凋亡、促進(jìn)分泌IL-6及MCP-1、調(diào)節(jié)Bax表達(dá)水平的作用強(qiáng)于PD98059,這可能是HUVEC內(nèi)存在其他信號(hào)轉(zhuǎn)導(dǎo)通路,且各信號(hào)轉(zhuǎn)導(dǎo)通路間相互作用的結(jié)果。丹參酮ⅡA可能也通過(guò)其他信號(hào)轉(zhuǎn)導(dǎo)通路參與了減輕LCN-2誘導(dǎo)的HUVEC損傷過(guò)程。丹參酮ⅡA的抗AS作用機(jī)制和臨床應(yīng)用仍需大量基礎(chǔ)實(shí)驗(yàn)及臨床試驗(yàn)研究加以明確。
作者貢獻(xiàn):萬(wàn)強(qiáng)進(jìn)行實(shí)驗(yàn)實(shí)施、評(píng)估、資料收集、撰寫(xiě)論文、成文、進(jìn)行質(zhì)量控制及審校;劉中勇進(jìn)行實(shí)驗(yàn)設(shè)計(jì)與實(shí)施、資料收集整理、并對(duì)文章負(fù)責(zé)。
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[1]Vanhoutte PM.Endothelial dysfunction:the first step toward coronary arteriosclerosis[J].Circ J,2009,73(4):595-601.
[2]Liu JT,Song E,Xu A,et al.Lipocalin-2 deficiency prevents endothelial dysfunction associated with dietary obesity:role of cytochrome P450 2C inhibition[J].Br J Pharmacol,2012,165(2):520-531.
[3]Chen FY,Guo R,Zhang BK,et al.Advances in cardiovascular effects of tanshinone ⅡA[J].China Journal of Chinese Materia Medica,2015,40(9):1649-1653.(in Chinese) 陳芬燕,郭韌,張畢奎,等.丹參酮ⅡA的心血管藥理作用研究進(jìn)展[J].中國(guó)中藥雜志,2015,40(9):1649-1653.
[4]Lin HH,Liao CJ,Lee YC,et al.Lipocalin-2-induced cytokine production enhances endometrial carcinoma cell survival and migration[J].Int J Biol Sci,2011,7(1):74-86.
[5]Liu Z,Wang J,Huang E,et al.Tanshinone ⅡA suppresses cholesterol accumulation in human macrophages:role of heme oxygenase-1[J].J Lipid Res,2014,55(2):201-213.
[6]Bolignano D,Coppolino G,Lacquaniti A,et al.From kidney to cardiovascular diseases:NGAL as a biomarker beyond the confines of nephrology[J].Eur J Clin Invest,2010,40(3):273-276.
[7]Wu G,Li H,Fang Q,et al.Elevated circulating lipocalin-2 levels independently predict incident cardiovascular events in men in a population-based cohort[J].Arterioscler Thromb Vasc Biol,2014,34(11):2457-2464.
[8]Lee YH,Lee SH,Jung ES,et al.Visceral adiposity and the severity of coronary artery disease in middle-aged subjects with normal waist circumference and its relation with lipocalin-2 and MCP-1[J].Atherosclerosis,2010,213(2):592-597.
[9]te Boekhorst BC,Bovens SM,Hellings WE,et al.Molecular MRI of murine atherosclerotic plaque targeting NGAL:a protein associated with unstable human plaque characteristics[J].Cardiovasc Res,2011,89(3):680-688.
[10]Ahearn J,Shields KJ,Liu CC,et al.Cardiovascular disease biomarkers across autoimmune diseases[J].Clin Immunol,2015,161(1):59-63.
[11]Besbes S,Mirshahi M,Pocard M,et al.New dimension in therapeutic targeting of Bcl-2 family proteins[J].Oncotarget,2015,6(15):12862-12871.
[12]Czabotar PE,Lessene G,Strasser A,et al.Control of apoptosis by the Bcl-2 protein family:implications for physiology and therapy[J].Nat Rev Mol Cell Biol,2014,15(1):49-63.
[13]Sun LF,An DQ.Research progress on mechanism of inflammatory signaling pathway in atherosclerosis and the intervention of traditional Chinese medicine[J].Chinese Journal of Arteriosclerosis,2015,23(11):1177-1181.(in Chinese) 孫龍飛,安冬青.炎性信號(hào)通路在動(dòng)脈粥樣硬化中的機(jī)制與中醫(yī)藥干預(yù)作用研究進(jìn)展[J].中國(guó)動(dòng)脈硬化雜志,2015,23(11):1177-1181.
[14]Wang J,Razuvaev A,Folkersen L,et al.The expression of IGFs and IGF binding proteins in human carotid atherosclerosis,and the possible role of IGF binding protein-1 in the regulation of smooth muscle cell proliferation[J].Atherosclerosis,2012,220(1):102-109.
[15]Duan J,Yang Y,Liu H,et al.Osthole ameliorates acute myocardial infarction in rats by decreasing the expression of inflammatory-related cytokines,diminishing MMP-2 expression and activating p-ERK[J].Int J Mol Med,2016,37(1):207-216.
[16]尹金泉,李寶生,朱春鵬,等.丹參酮ⅡA對(duì)48例急性期腦出血患者療效和安全性研究[J].中國(guó)煤炭工業(yè)醫(yī)學(xué)雜志,2014,17(1):132-134.
[17]肖輝,寧倩,李樂(lè)軍.丹參酮ⅡA磺酸鈉注射液治療急性腦梗死的臨床觀察[J].中國(guó)臨床醫(yī)生,2013,41(12): 39.
[18]Li X,Du JR,Yu Y,et al.Tanshinone ⅡA inhibits smooth muscle proliferation and intimal hyperplasia in the rat carotid balloon-injured model through inhibition of MAPK signaling pathway[J].J Ethnopharmacol,2010,129(2):273-279.
(本文編輯:陳素芳)
Effect of Tanshinone ⅡA on Human Umbilical Vein Endothelial Cell Injury Induced by Lipocalin-2
WANQiang,LIUZhong-yong.DepartmentofMedicalCardiology,AffiliatedHospitalofJiangxiUniversityofTraditionalChineseMedicine,Nanchang330006,China
Objective To investigate the protective effect of tanshinone ⅡA on human umbilical vein endothelial cell (HUVEC) injury induced by lipocalin-2 (LCN-2) and its relation with ERK1/2 signal transduction pathway.Methods From March to May in 2015,HUVEC were divided into different concentration groups:(0,5,10 and 20 μmol/L LCN-2 for 48 h),different time groups:(10 μmol/L LCN-2 for 0,12,24 and 48 h) and different drug intervention groups:control group,LCN-2 group (10 μmol/L LCN-2 for 48 h),LCN-2+tanshinone ⅡA group (10 μmol/L tanshinone ⅡA for 1 h then 10 μmol/L LCN-2 for 48 h) and LCN-2+PD98059 group (20 μmol/L PD98059 for 30 min then 10 μmol/L LCN-2 for 48 h).MTT assay was used to detect cell proliferation and flow cytometry was used to detect cell apoptosis;the levels of interleukin-6(IL-6) and monocyte chemotactic protein-1 (MCP-1) were determined by enzyme-linked immuno-sorbent assay (ELISA),and the levels of Bcl-2,Bax and p-ERK1/2 in HUVEC were determined by Western blotting.Results Compared with 0 μmol/L group and 5 μmol/L gruop,10 μmol/L group and 20 μmol/L group were significantly lower in A value and the level of Bcl-2 but were significantly higher in apoptosis rate,the levels of IL-6,MCP-1,Bax and p-ERK1/2(P<0.05).Compared 10 μmol/L group,20 μmol/L group was higher in the levels of IL-6 and MCP-1 (P<0.05).Compared with 0 h group,24 h group was higher in the level of MCP-1 (P<0.05).Compared with 0 h group and 24 h group,48 h group and 72 h group were lower in A value and the level of Bcl-2 but were higher in apoptosis rate and the levels of IL-6,MCP-1,Bax and p-ERK1/2 (P<0.05).Compared with 48 h group,72 h group was higher in the level of IL-6 but was lower in the levels of Bcl-2 and p-ERK1/2 (P<0.05).Compared with control group,LCN-2 group,LCN-2+tanshinone ⅡA group and LCN-2+PD98059 group were lower in A value and the level of Bcl-2 but were higher in apoptosis rate and the levels of IL-6,MCP-1,Bax and LCN-2 group,LCN-2+tanshinone ⅡA group were higher in the level of p-ERK1/2 (P<0.05).Compared with LCN-2 group,LCN-2+tanshinone ⅡA group and LCN-2+PD98059 group were higher in A value and the level of Bcl-2 but were lower in apoptosis rate and the levels of IL-6,MCP-1,Bax and p-ERK1/2 (P<0.05).Compared with LCN-2+tanshinone ⅡA group,LCN-2+PD98059 group was lower in A value and the level of p-ERK1/2 but was higher in apoptosis rate and the levels of IL-6,MCP-1,Bcl-2 and Bax(P<0.05).Conclusion Tanshinone ⅡA attenuates HUVEC injury induced by LCN-2 and its mechanism may be related to the inhibition of ERK1/2 signal transduction pathway.
Tanshinone ⅡA;Lipocalins;Extracellular signal-regulated MAP kinases;Human umbilical vein endothelial cells
國(guó)家自然科學(xué)基金資助項(xiàng)目(81460680);江西省科技計(jì)劃資助項(xiàng)目(20135BBG70002)
330006 江西省南昌市,江西中醫(yī)藥大學(xué)附屬醫(yī)院心血管病科
劉中勇,330006 江西省南昌市,江西中醫(yī)藥大學(xué)附屬醫(yī)院心血管病科;E-mail:liuzhongyong2014@163.com
R 363
A
10.3969/j.issn.1007-9572.2016.09.021
2015-06-14;
2016-01-12)