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      人喉鱗癌Hep-2細(xì)胞血紅素加氧酶1表達(dá)及其對(duì)卡鉑作用的影響

      2015-02-19 07:17:46呂欣宋冬梅王寶山河北醫(yī)科大學(xué)第一醫(yī)院石家莊050032河北醫(yī)科大學(xué)
      山東醫(yī)藥 2015年36期
      關(guān)鍵詞:卡鉑血紅素鱗癌

      呂欣,宋冬梅,王寶山,2(河北醫(yī)科大學(xué)第一醫(yī)院,石家莊05003;2河北醫(yī)科大學(xué))

      人喉鱗癌Hep-2細(xì)胞血紅素加氧酶1表達(dá)及其對(duì)卡鉑作用的影響

      呂欣1,宋冬梅1,王寶山1,2
      (1河北醫(yī)科大學(xué)第一醫(yī)院,石家莊050031;2河北醫(yī)科大學(xué))

      摘要:目的探討人喉鱗癌Hep-2細(xì)胞血紅素加氧酶1(HO-1)表達(dá)對(duì)卡鉑作用的影響及其可能的作用機(jī)制。方法將對(duì)數(shù)生長(zhǎng)期Hep-2細(xì)胞分為六組。空白對(duì)照組不干預(yù),ZnPP(HO-1抑制劑鋅原卟啉)組加入ZnPP 10 μmol/L; Hemin(HO-1誘導(dǎo)劑氯化血紅素)組加入Hemin 10 μmol/L;卡鉑組加入卡鉑10 μg/mL; Hemin聯(lián)合卡鉑組先加入Hemin 10 μmol/L,作用1 h后再加入卡鉑10 μg/mL; ZnPP聯(lián)合卡鉑組先加入ZnPP 10 μmol/L,作用1 h后再加入卡鉑10 μg/mL。每組設(shè)5個(gè)復(fù)孔,加藥后培養(yǎng)24 h。采用MTT法觀察各組細(xì)胞存活率; RT-PCR、Western blotting法檢測(cè)各組細(xì)胞內(nèi)HO-1mRNA和蛋白表達(dá)情況;dCFH-DA探針檢測(cè)各組細(xì)胞內(nèi)活性氧(ROS);流式細(xì)胞術(shù)檢測(cè)各組細(xì)胞凋亡率。結(jié)果①細(xì)胞存活率:與空白對(duì)照組比較,卡鉑組和ZnPP組明顯降低,Hemin組明顯升高(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組明顯降低,Hemin聯(lián)合卡鉑組明顯升高(P均<0.05)。②細(xì)胞HO-1mRNA和蛋白相對(duì)表達(dá)量:與空白對(duì)照組比較,卡鉑組和Hemin組明顯升高,ZnPP組明顯下降(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組明顯降低,Hemin聯(lián)合卡鉑組明顯升高(P均<0.05)。③細(xì)胞凋亡率:與空白對(duì)照組比較,卡鉑組、ZnPP組明顯升高(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組明顯升高,Hemin聯(lián)合卡鉑組明顯降低(P均<0.05);④細(xì)胞內(nèi)ROS活性:與空白對(duì)照組比較,卡鉑組、ZnPP組顯著增高(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組明顯升高,Hemin聯(lián)合卡鉑組明顯降低(P均<0.05)。結(jié)論HO-1在Hep-2細(xì)胞內(nèi)的高表達(dá)可影響卡鉑對(duì)Hep-2細(xì)胞的促凋亡作用,應(yīng)用ZnPP后HO-1表達(dá)下調(diào),同時(shí)提高了人喉鱗癌Hep-2細(xì)胞在卡鉑作用下的凋亡率,這一過程可能與增強(qiáng)細(xì)胞內(nèi)ROS水平相關(guān)。

      關(guān)鍵詞:喉鱗癌;血紅素加氧酶1; Hep-2細(xì)胞;卡鉑;細(xì)胞凋亡

      HO-1 expression in human laryngeal squamous-cell carcinoma Hep-2 cells and its influence on Carboplatin’s effects

      LYU Xin1,SONGdong-mei,WANG Bao-shan
      (1 The First Hospital of Hebeimedical University,Shijiazhuang 050031,China)

      Abstract:Objective To investigate the influence of heme oxygenase-1(HO-1)expression in human laryngeal squamous-cell carcinoma Hep-2 cells on the Carboplatin’s effects and its possiblemechanism.Methods Hep-2 cells in the logarithmic phase weredivided into six groups.The blank control group was not treated,ZnPP group was treated with 10 μmol/L HO-1 inhibitor,Hemin group was treated with 10 μmol/L HO-1 inducer,and Carboplatin group was treated with 10 μg/mL,Hemin combined with Carboplatin group was treated with 10 μmol/L Hemin alone for 1 h and then 10 μg/mL Carboplatin,ZnPP combined with Carboplatin group was treated with 10 μmol/L ZnPP alone for 1 h and then 10 μg/mL Carboplatin.These six groups all had five complex holes and were cultured for 24 h afterdosing.The survival rates were evaluated bymTT assay.The expression of HO-1mRNA and protein wasdetected by RT-PCR and Western blotting.Intracellular ROS activity was examined bydCFH-DA probe.The apoptosis rate was performed by flow cytometry.Results①the cell survival rate: compared with the control group,the survival rates of Hep-2 cells in the ZnPP and Carboplatin groups were significantlydecreased,but the survival rate in the Hemin group was increased(all P<0.05); compared with the Carboplatin group,the survival rate of the Znpp combined with Carboplatin group wasdecreased and the He-

      min combined with Carboplatin group was increased(all P<0.05).②HO-1 inmRNA and protein levels: compared with the control group,the expression of HO-1mRNA and protein was increased in the Hemin and Carboplatin groups and wasdecreased in the ZnPP group(all P<0.05); compared with the Carboplatin group,the Znpp combined with Carboplatindecreased,but HO-1 expression was increased in the Hemin combined with Carboplatin group(all P<0.05).③the apoptosis rate: compared with the control group,the apoptosis rates in the Carboplatin and ZnPP groups were increased(all P <0.05); compared with the Carboplatin group,Znpp combined with Carboplatin increased the apoptosis rate,but Hemin combined with Carboplatindecreased the apoptosis rate(all P<0.05).④the ROS activity: compared with the control group,the the ROS activities in the Carboplatin and ZnPP groups were increased(all P<0.05); compared with the Carboplatin group,Znpp combined with Carboplatin increased the ROS activity,but Hemin combined with Carboplatindecreased the ROS activity(all P<0.05).Conclusions HO-1 overexpressionmay affect the pro-apoptotic effects of Carboplatin on Hep-2 cells,and the application of ZnPPdown-regulates the HO-1 expression and increases the apoptosis rate of Hep-2 cells with treatment of Carboplatin.In this process,the elevation of intracellular ROS activitymay be involved.

      Key words:laryngeal squamous-cell carcinoma; heme oxygenase-1; Hep-2 cells; Carboplatin; apoptosis

      血紅素氧合酶1(HO-1)屬于微粒體催化酶類,是降解血紅素重要的限速酶之一,其可將血紅素分解為一氧化碳、Fe2 +、膽綠素等[1~3]。HO-1是一種細(xì)胞保護(hù)性酶,具有抗炎、抗氧化及抑制細(xì)胞凋亡等重要生物學(xué)作用;但近年來研究發(fā)現(xiàn),HO-1的這一細(xì)胞保護(hù)作用及抗凋亡特性可能是促進(jìn)腫瘤細(xì)胞生長(zhǎng)、轉(zhuǎn)移及產(chǎn)生治療抵抗的重要因素[4~6],但具體機(jī)制不清。目前,HO-1在頭頸部腫瘤尤其是喉鱗癌中的作用鮮見報(bào)道。2014年11月~2015年5月,我們觀察了HO-1誘導(dǎo)劑氯化高鐵血紅素(Hemin)和HO-1抑制劑鋅原卟啉(ZnPP)對(duì)人喉鱗癌Hep-2細(xì)胞內(nèi)HO-1表達(dá)的影響及HO-1表達(dá)對(duì)卡鉑作用的影響,分析HO-1與喉鱗癌化療抵抗的關(guān)系,為喉鱗癌的治療尋找新的靶點(diǎn)。

      1 材料與方法

      1.1材料人喉鱗癌Hep-2細(xì)胞株(以下稱Hep-2細(xì)胞)本實(shí)驗(yàn)室凍存。DMEM/F12購(gòu)自Gibco公司;胎牛血清購(gòu)自杭州四季青公司; Hemin購(gòu)自美國(guó)Sigma公司(Lot NO.51280); ZnPP購(gòu)自美國(guó)Santa Cruz Biotechnology公司(SC-200329);卡鉑購(gòu)自山東齊魯制藥有限公司(國(guó)藥準(zhǔn)字號(hào)H10920028);二甲基亞砜(DMSO)購(gòu)自美國(guó)Sigma公司(Lot NO.D-5879);四甲基噻唑基四唑(MTT)購(gòu)自美國(guó)Sigma公司(Lot NO.M2128);碘化丙啶(PI)購(gòu)自美國(guó)Sigma公司(Lot NO.P4170); HO-1及內(nèi)參GAPDH引物由上海生工合成;兔抗人HO-1單克隆抗體購(gòu)自美國(guó)abcam公司(ab13243);內(nèi)參β-actin購(gòu)自北京博奧森試劑公司(bs-0061R);活性氧檢測(cè)試劑盒購(gòu)自江蘇碧云天生物技術(shù)研究所(S0033); RT-PCR檢測(cè)試劑盒購(gòu)自立陶宛Fermentas公司(K1611,K1081)。

      1.2細(xì)胞培養(yǎng)、分組及干預(yù)將Hep-2細(xì)胞置于含10%胎牛血清、100 U/mL青霉素、100 U/mL鏈霉素的DMEM/F12培養(yǎng)液中,于37℃、5% CO2的孵箱內(nèi)培養(yǎng)。以0.25%胰酶消化傳代,2~3d傳代1次,實(shí)驗(yàn)細(xì)胞均處于對(duì)數(shù)生長(zhǎng)期。將Hep-2細(xì)胞胰酶消化后,以每孔5×103個(gè)細(xì)胞接種于96孔板,待細(xì)胞貼壁12 h后分為六組??瞻讓?duì)照組不干預(yù),ZnPP組加入ZnPP 10 μmol/L; Hemin組加入Hemin 10 μmol/L;卡鉑組加入卡鉑10 μg/mL; Hemin聯(lián)合卡鉑組先加入Hemin 10 μmol/L,作用1 h后再加入卡鉑10 μg/mL; ZnPP聯(lián)合卡鉑組先加入ZnPP 10 μmol/L,作用1 h后再加入卡鉑10 μg/mL。每組設(shè)5個(gè)復(fù)孔,加藥后均培養(yǎng)24 h。

      1.3 Hep-2細(xì)胞存活率檢測(cè)采用MTT法。每孔加入5mg/mLmTT 20 μL,繼續(xù)培養(yǎng)4 h后,徹底去上清后加DMSO 200 μL/孔,振蕩30min至結(jié)晶完全溶解,酶標(biāo)儀測(cè)定570 nm處的光密度值(OD 值),實(shí)驗(yàn)重復(fù)5次。細(xì)胞存活率(%)=(OD試驗(yàn)孔/OD對(duì)照孔)×100%。

      1.4 Hep-2細(xì)胞HO-1mRNA及HO-1蛋白表達(dá)檢測(cè)采用RT-PCR法檢測(cè)各組Hep-2細(xì)胞HO-1mRNA表達(dá):各組加藥培養(yǎng)24 h后TRIzol法提取總RNA,取等量RNA(500 ng)逆轉(zhuǎn)錄為cDNA。HO-1上游引物5'-CTTTGGTCAATGACACCGTG-3',下游引物5'-TGTTTGTGGTAAGCCATCCA-3',產(chǎn)物長(zhǎng)度168 bp;β-actin上游引物5'-GTGGGGCGCCCCAGGCACCA-3',下游引物5'-CTCCTTAATGTCACGCACGATTT-3',產(chǎn)物長(zhǎng)度540 bp?;驍U(kuò)增反應(yīng)條件: 95℃預(yù)變性5min; 95℃、30 s,57℃、30 s,72℃、30 s,β-actin 26個(gè)循環(huán),HO-1 29個(gè)循環(huán),72℃延伸10min,4℃、2 h。產(chǎn)物在1%的瓊脂糖凝膠上電泳,利用Lab Work5.0系統(tǒng)進(jìn)行圖像分析。采用Western blotting法檢測(cè)HO-1蛋白表達(dá):各組加藥24 h后收集細(xì)胞,加入4℃預(yù)冷的RIPA細(xì)胞裂解液300

      μL冰上裂解30min,期間細(xì)胞刮刀刮3次,4℃、12 000 r/min離心20min,取上清液5 μL,BCA法蛋白定量,取總蛋白量一致后進(jìn)行SDS-PAGE電泳,電轉(zhuǎn)至PVDF膜上,然后置于5%脫脂奶粉TBST溶液封閉2 h,加入1∶2 000兔抗人HO-1一抗,同時(shí)用兔抗人β-actin(1∶500)作為內(nèi)參,4℃過夜。辣根過氧化物酶(HRP)標(biāo)記的羊抗兔二抗(1∶5 000)室溫孵育2 h后,TBST溶液洗滌15min/2次,ECL發(fā)光顯色,結(jié)果掃描,HO-1蛋白條帶灰度值測(cè)定。

      1.5Hep-2細(xì)胞內(nèi)活性氧(ROS)檢測(cè)采用DCFH-DA探針檢測(cè)。加藥培養(yǎng)24 h后,胰酶消化、終止、收集細(xì)胞,收集細(xì)胞后裝載探針,按照1∶1 000用無血清培養(yǎng)基稀釋DCFH-DA,使終濃度為10 μmol/L,細(xì)胞收集后懸浮于稀釋好的DCFHDA中,細(xì)胞密度為1×106/mL,37℃細(xì)胞培養(yǎng)箱內(nèi)孵育20min,無血清培養(yǎng)基洗3次,488 nm激發(fā)波長(zhǎng),525 nm發(fā)射波長(zhǎng),檢測(cè)各組熒光強(qiáng)度,結(jié)果以平均熒光強(qiáng)度表示細(xì)胞內(nèi)ROS的相對(duì)活性。

      1.6 Hep-2細(xì)胞凋亡率觀察加藥后繼續(xù)培養(yǎng)24 h,胰酶消化正常培養(yǎng)基終止消化后收集細(xì)胞,4℃預(yù)冷PBS洗滌細(xì)胞,1 500 r/min離心5min,重復(fù)2次,90%酒精固定-20℃保存12 h后,4℃預(yù)冷PBS洗滌細(xì)胞,1 500 r/min離心5min,重復(fù)2次,洗去酒精,制成單細(xì)胞懸液300 μL后加入PI使終濃度為10 μg/mL,室溫避光孵育20min,流式細(xì)胞儀計(jì)算細(xì)胞凋亡率。數(shù)據(jù)由ModFit2.0軟件系統(tǒng)分析。

      1.7統(tǒng)計(jì)學(xué)方法采用SPSS13.0統(tǒng)計(jì)軟件。計(jì)量資料以珋x±s表示,均數(shù)比較采用t檢驗(yàn),多組數(shù)據(jù)采用方差分析。P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

      2 結(jié)果

      2.1細(xì)胞存活率細(xì)胞存活率空白對(duì)照組為96.8%±1.09%,卡鉑組為75.3%±0.21%,ZnPP組為84.7%±0.04%,Hemin組為101.1%± 0.13%,ZnPP聯(lián)合卡鉑組為54.9%±0.31%,Hemin聯(lián)合卡鉑組為81.1%±0.19%; ZnPP組及卡鉑組明顯低于空白對(duì)照組; Hemin組明顯高于空白對(duì)照組; ZnPP聯(lián)合卡鉑組明顯低于卡鉑組,Hemin聯(lián)合卡鉑組明顯高于卡鉑組; P均<0.05

      2.2HO-1mRNA及HO-1mRNA蛋白表達(dá)與空白對(duì)照組比較,卡鉑組和Hemin組HO-1mRNA和HO-1蛋白明顯升高,ZnPP組明顯下降(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組HO-1mRNA和HO-1蛋白明顯降低,Hemin聯(lián)合卡鉑組明顯升高(P均<0.05)。見表1、圖1、圖2。

      表1 各組HO-1mRNA及蛋白相對(duì)表達(dá)(相對(duì)表達(dá)量,)

      表1 各組HO-1mRNA及蛋白相對(duì)表達(dá)(相對(duì)表達(dá)量,)

      注:與空白對(duì)照組比較,*P<0.05;與卡鉑組比較,#P<0.05。

      組別 HO-1mRNA HO-1蛋白空白對(duì)照組11 ZnPP組 0.25±0.03* 0.57±0.07*Hemin組 1.82±0.11* 1.47±0.01*卡鉑組 1.22±0.03* 1.23±0.10*ZnPP聯(lián)合卡鉑組 0.47±0.00# 0.94±0.02#Hemin聯(lián)合卡鉑組 1.86±0.03* # 2.35±0.12*#

      圖1 各組HO-圖1mRNA表達(dá)

      圖2 各組HO-圖1蛋白表達(dá)

      2.3ROS相對(duì)活性空白對(duì)照組、ZnPP組、Hemin組、卡鉑組、ZnPP聯(lián)合卡鉑組、Hemin聯(lián)合卡鉑組平均熒光強(qiáng)度分別為1、1.79±0.12、0.59±0.09、2.30 ±0.11、3.91±0.04、1.21±0.02;與空白對(duì)照組比較,卡鉑組、ZnPP組ROS活性顯著增高(P均<0.05);與卡鉑組比較,ZnPP聯(lián)合卡鉑組ROS活性明顯升高,Hemin聯(lián)合卡鉑組明顯降低(P均<0.05)。

      2.4細(xì)胞凋亡率空白對(duì)照組、ZnPP組、Hemin組、卡鉑組、ZnPP聯(lián)合卡鉑組、Hemin聯(lián)合卡鉑組細(xì)胞凋亡率分別為5.15%±1.27%、11.62%±1.02%、5.01%±0.94%、20.16%±1.02%、50.67%± 2.31%、13.62%±1.29%; Hemin組與空白對(duì)照組比較差異無統(tǒng)計(jì)學(xué)意義(P>0.05);卡鉑組、ZnPP組明顯高于空白對(duì)照組(P均<0.05); ZnPP聯(lián)合卡鉑組明顯高于卡鉑組,Hemin聯(lián)合卡鉑組明顯低于卡鉑組(P均<0.05)。

      3 討論

      喉鱗癌早期癥狀隱匿、生長(zhǎng)速度快,且對(duì)放化療的敏感度低。HO-1與腫瘤發(fā)生、發(fā)展及化療抵抗之間的關(guān)系目前雖不甚清楚,但近年來正逐漸引起臨床重視[7,8]。研究表明,HO-1在一部分腫瘤組織中呈強(qiáng)陽性表達(dá),增加或降低HO-1的表達(dá)可影響腫瘤細(xì)胞的增殖與凋亡,目前在腫瘤治療過程中合理調(diào)控HO-1的表達(dá)正逐漸成為研究的一大熱點(diǎn)[9,10]。

      Tan等[11]研究證實(shí),在乳腺癌細(xì)胞中HO-1的高表達(dá)可促進(jìn)乳腺癌細(xì)胞的增殖,促進(jìn)其侵襲及轉(zhuǎn)

      移,其潛在機(jī)制可能與HO-1促進(jìn)細(xì)胞核增殖抗原及細(xì)胞周期調(diào)控蛋白Cyclin B1等表達(dá)有關(guān)。本研究結(jié)果表明,Hemin作用于Hep-2細(xì)胞后,細(xì)胞內(nèi)HO-1mRNA和蛋白水平表達(dá)上調(diào),而應(yīng)用ZnPP后細(xì)胞內(nèi)HO-1mRNA和蛋白水平表達(dá)下調(diào),細(xì)胞活性降低。提示降低HO-1表達(dá)能夠抑制Hep-2細(xì)胞的生長(zhǎng)活性。單獨(dú)應(yīng)用化療藥物卡鉑后,細(xì)胞內(nèi)HO-1表達(dá)增高,這一結(jié)果與卡鉑可促進(jìn)細(xì)胞內(nèi)ROS活性增強(qiáng)有關(guān),ROS反應(yīng)水平的增高可激活下游氧化應(yīng)激反應(yīng)原件ARE,進(jìn)而激活Nrf2誘導(dǎo)HO-1表達(dá),進(jìn)而減弱卡鉑對(duì)于Hep-2細(xì)胞的殺傷作用。而聯(lián)合應(yīng)用ZnPP抑制細(xì)胞內(nèi)HO-1表達(dá)后,細(xì)胞存活率下降、凋亡率顯著增加。由此提示Hemin可誘導(dǎo)HO-1表達(dá),對(duì)人喉鱗癌Hep-2細(xì)胞抵抗氧化應(yīng)激損傷及化療藥物的殺傷存在部分保護(hù)作用,而聯(lián)合應(yīng)用ZnPP阻斷細(xì)胞內(nèi)HO-1表達(dá)后,能夠增強(qiáng)卡鉑對(duì)Hep-2細(xì)胞的殺傷作用。該機(jī)制與HO-1在白血病、肺癌、胰腺癌等實(shí)體腫瘤細(xì)胞中的報(bào)道一致[12~17]。

      目前研究證實(shí),腫瘤細(xì)胞在放化療過程中產(chǎn)生的自我保護(hù)及抵抗可能與HO-1的抗氧化應(yīng)激反應(yīng)有關(guān)。在腫瘤細(xì)胞中抗氧化酶系統(tǒng)如超氧化物歧化酶、過氧化氫酶等均表現(xiàn)為下調(diào)趨勢(shì);此時(shí),HO-1及其代謝產(chǎn)物成為主要的抗氧化應(yīng)激反應(yīng)體系[18~20]。本實(shí)驗(yàn)結(jié)果顯示,ZnPP下調(diào)人喉鱗癌Hep-2細(xì)胞內(nèi)HO-1表達(dá)后,細(xì)胞存活率降低、凋亡率升高,細(xì)胞內(nèi)ROS活性增加;聯(lián)合應(yīng)用卡鉑化療后細(xì)胞凋亡率顯著升高,細(xì)胞內(nèi)ROS活性進(jìn)一步增加。而當(dāng)卡鉑聯(lián)合應(yīng)用Hemin后,細(xì)胞內(nèi)ROS活性及細(xì)胞凋亡率下降,由此表明HO-1可能通過調(diào)節(jié)ROS活性影響卡鉑對(duì)Hep-2細(xì)胞的殺傷作用。同時(shí)也有研究報(bào)道,HO-1還可通過調(diào)節(jié)Akt途徑和P21蛋白等方式影響腫瘤細(xì)胞生物學(xué)行為,但具體機(jī)制不詳,還有待于進(jìn)一步研究證實(shí)。

      綜上所述,體外抑制HO-1表達(dá)能夠降低Hep-2細(xì)胞活性,增強(qiáng)卡鉑對(duì)Hep-2細(xì)胞的殺傷作用,其具體機(jī)制可能與增強(qiáng)細(xì)胞內(nèi)ROS活性誘導(dǎo)細(xì)胞凋亡有關(guān)。HO-1可能在喉鱗癌發(fā)生、發(fā)展及治療過程中發(fā)揮重要作用,合理調(diào)控腫瘤細(xì)胞中HO-1表達(dá)有望成為喉鱗癌臨床治療的新突破。

      參考文獻(xiàn):

      [1]Chen J,Emara N,Solomides C,et al.Resistance to platinumbased chemotherapy in lung cancer cell lines[J].Cancer Chemother Pharmacol,2010,66(6): 1103-1111.

      [2]Zhang K,Yang H,Wang Y,et al.Expression and significance of nrf2 and its target genes in pulmonary adenocarcinoma a549 cells resistant to Cisplatin[J].Zhongguo Fei Ai Za Zhi,2009,12(11): 1150-1154.

      [3]Wang LH,Li Y,Yang SN,et al.Gambogic acid synergistically potentiatescisplatin-induced apoptosis in non-small-cell lung cancer through suppressingNF-κB andmAPK/HO-1 signalling[J].Br J Cancer,2014,110(2): 341-352.

      [4]Furfaro AL,Piras S,Passalacquam,et al.HO-1 up-regulation: a key point in high-risk neuroblastoma resistance to bortezomib[J].Biochim Biophys Acta,2014,1842(4): 613-622.

      [5]Jais A,Einwallner E,Sharif O,et al.Heme oxygenase-1drivesmetaflammation and insulin resistance inmouse andman[J].Cell,2014,158(1): 25-40.

      [6]Wagener FA,Dankers AC,van Summeren F,et al.Heme Oxygenase-1 and breast cancer resistance protein protect against heme-induced toxicity[J].Curr Pharmdes,2013,19(15): 2698-2707.

      [7]Wegiel B,Gallod,Csizmadia E,et al.Carbonmonoxide expeditesmetabolic exhaustion to inhibit tumor growth[J].Cancer Res,2013,73(23): 7009-7021.

      [8]Yun BR,LeemJ,Kim JH,et al.Enhancement of parthenolideinduced apoptosis by a PKC-alpha inhibition through heme oxygenase-1 blockage in cholangiocarcinoma cells[J].Expmolmed,2010,42(11): 787-797.

      [9]Rushworth SA,Bowles KM,Raninga P,et al.NF-kappaB-inhibited acutemyeloid leukemia cells are rescued from apoptosis by heme oxygenase-1 induction[J].Cancer Res,2010,70(7):2973-2983.

      [10]Salis O,Bedir A,Ozdemir T,et al.The relationship between anticancer effect ofmetformin and the transcriptional regulation of certain genes(CHOP,CAV-1,HO-1,SGK-1 and Par-4)onmCF-7 cell line [J].Eur Revmed Pharmacol Sci,2014,18(11):1602-1609.

      [11]Tan Q,Wang H,Hu Y,et al.Src/STAT3-dependent heme oxygenase-1 inductionmediates chemoresistance of breast cancer cells todoxorubicin by promoting autophagy[J].Cancer Sci,2015,106(8): 1023-1032.

      [12]Chen N,Wu L,Yuan H,et al.ROS/Autophagy/Nrf2 Pathwaymediated Low-Dose Radiation Induced Radio-Resistance in Human Lung Adenocarcinoma A549 Cell[J].Int J Biol Sci,2015,11(7): 833-844.

      [13]La P,F(xiàn)ernando AP,Wang Z,et al.Zinc protoporphyrin regulates cyclind1 expression independent of heme oxygenase inhibition [J].J Biol Chem,2009,284(52): 36302-36311.

      [14]Alaoui-JamalimA,Bismar TA,Gupta A,et al.A novel experimental heme oxygenase-1-targeted therapy for hormone-refractory prostate cancer[J].Cancer Res,2009,69(20): 8017-8024.

      [15]Nowisd,Bugajskim,Winiarskam,et al.Zinc protoporphyrin IX,a heme oxygenase-1 inhibitor,demonstrates potent antitumor effects but is unable to potentiate antitumor effects of chemotherapeutics inmice[J].BMC Cancer,2008,8: 197.

      [16]Mayerhoferm,Gleixner KV,Mayerhofer J.Targeting of heat shock protein 32(Hsp32)/heme oxygenase-1(HO-1)in leukemic cells in chronicmyeloid leukemia: a novel approach to overcome resistance against imatinib[J].Blood,2008,111(4): 2200-2210.

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      [18]DomT,Kim HG,Khanal T,et al.Metformin inhibits heme oxygenase-1 expression in cancer cells through inactivation of Raf-ERK-Nrf2 signaling and AMPK-independent pathways[J].Toxicol Appl Pharmacol,2013,271(2): 229-238.

      [19]Zhong Y,Zhang F,Sun Z,et al.Drug resistance associates with activation of Nrf2 inmCF-7/DOX cells,and wogonin reverses it bydown-regulating Nrf2-mediated cellulardefense response[J].Mol Carcinog,2013,52(10): 824-834.

      [20]KimdH,Song NY,Kim EH,et al.15-deoxy-Δ12,14-prostaglandin induces p53 expression through Nrf2-mediated upregulation of heme oxygenase-1 in human breast cancer cells[J].Free Radic Res,2014,48(9): 1018-1027.

      收稿日期:( 2015-06-30)

      通信作者簡(jiǎn)介:王寶山(1963-),男,教授,博士研究生導(dǎo)師,研究方向?yàn)槎茄屎眍^頸外科學(xué)。E-mail: wbsent@126.com

      作者簡(jiǎn)介:第一呂欣(1983-),男,助理研究員,研究方向?yàn)槎茄屎眍^頸外科學(xué)。E-mail: lvxin1983doctor@163.com

      基金項(xiàng)目:河北省自然科學(xué)基金資助項(xiàng)目(H2013206264)。

      文章編號(hào):1002-266X(2015)36-0007-04

      文獻(xiàn)標(biāo)志碼:A

      中圖分類號(hào):R739.65

      doi:10.3969/j.issn.1002-266X.2015.36.003

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