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        干擾lncRNA H19通過調(diào)控Notch信號(hào)通路增強(qiáng)耐順鉑乳腺癌細(xì)胞的藥物敏感性*

        2022-10-13 05:27:40施文標(biāo)金曉燕龐文洋王遠(yuǎn)帆汪正一張強(qiáng)
        中國(guó)病理生理雜志 2022年9期
        關(guān)鍵詞:耐藥乳腺癌

        施文標(biāo), 金曉燕, 龐文洋, 王遠(yuǎn)帆, 汪正一, 張強(qiáng)

        干擾lncRNA H19通過調(diào)控Notch信號(hào)通路增強(qiáng)耐順鉑乳腺癌細(xì)胞的藥物敏感性*

        施文標(biāo), 金曉燕, 龐文洋, 王遠(yuǎn)帆, 汪正一, 張強(qiáng)△

        (臺(tái)州市立醫(yī)院乳腺外科,浙江 臺(tái)州 318000)

        探究長(zhǎng)鏈非編碼RNA(long non-coding RNA, lncRNA) H19對(duì)乳腺癌細(xì)胞順鉑(cisplatin/cis-diamminodichloroplatinum, DDP)耐藥性的作用及其分子機(jī)制。構(gòu)建耐DDP人乳腺癌細(xì)胞株MCF7-Re;采用RT-qPCR檢測(cè)lncRNA H19在人正常乳腺上皮細(xì)胞株MCF10A及人乳腺癌細(xì)胞株MCF7和MCF7-Re中的表達(dá)水平。構(gòu)建lncRNA H19干擾質(zhì)粒;采用CCK-8法檢測(cè)DDP處理后MCF7-Re細(xì)胞的活力;采用TUNEL法檢測(cè)細(xì)胞凋亡;Western blot檢測(cè)Bcl-2、Bax、cleaved caspase-3、ATP結(jié)合盒蛋白B亞家族成員1(ATP-binding cassette protein subfamily B member 1, ABCB1)、Notch1和發(fā)狀分裂相關(guān)增強(qiáng)子1(hairy and enhancer of split 1, Hes1)的表達(dá);構(gòu)建Notch1過表達(dá)質(zhì)粒,進(jìn)行逆轉(zhuǎn)實(shí)驗(yàn)驗(yàn)證lncRNA H19的作用機(jī)制。lncRNA H19在MCF7-Re細(xì)胞中表達(dá)顯著增加。干擾H19在DDP處理后進(jìn)一步降低MCF7-Re細(xì)胞活力(<0.01),耐藥蛋白ABCB1表達(dá)顯著降低(<0.01),細(xì)胞凋亡率顯著升高(<0.01),Bcl-2蛋白表達(dá)顯著減少(<0.01),Bax和cleaved caspase-3蛋白表達(dá)顯著增加(<0.01),并且Notch信號(hào)通路相關(guān)蛋白(Notch1和Hes1)的表達(dá)減少(<0.01)。轉(zhuǎn)染Notch1過表達(dá)質(zhì)粒后,干擾lncRNA H19表達(dá)的MCF7-Re細(xì)胞活力得到一定程度的上升(<0.01),耐藥蛋白ABCB1表達(dá)顯著增加(<0.01),細(xì)胞凋亡率顯著降低(<0.01),Bcl-2蛋白表達(dá)顯著增加(<0.01),Bax和cleaved caspase-3蛋白表達(dá)顯著減少(<0.01)。干擾lncRNA H19通過抑制Notch信號(hào)通路抑制耐DDP乳腺癌細(xì)胞的增殖,并增強(qiáng)該細(xì)胞對(duì)DDP的敏感性。

        長(zhǎng)鏈非編碼RNA H19;乳腺癌;順鉑;耐藥性;Notch信號(hào)通路

        乳腺癌是最常見的威脅生命的癌癥,也是女性癌癥相關(guān)死亡的主要原因[1]。近數(shù)十年間,隨著對(duì)乳腺癌生物學(xué)的深入了解及現(xiàn)代醫(yī)療科技的進(jìn)步,通過手術(shù)、放射和藥物治療可緩解乳腺癌癥狀和延長(zhǎng)生存期[2]。然而,目前臨床治療中腫瘤細(xì)胞出現(xiàn)的耐藥性大大降低了藥效并導(dǎo)致藥物治療失?。?-4]。順鉑(cisplatin/cis-diamminodichloroplatinum, DDP)是一種廣譜抗腫瘤藥物,是晚期乳腺癌患者常用的化療藥物之一,對(duì)包含乳腺癌在內(nèi)的多種癌癥具有短期治療效果[5],但是由于大多數(shù)乳腺癌對(duì)DDP存在的原發(fā)性耐藥或獲得性耐藥限制了其在臨床的運(yùn)用[6]。因此,研究提高DDP化療敏感性的機(jī)制對(duì)乳腺癌的治療非常重要。

        長(zhǎng)鏈非編碼RNA(long non-coding RNA, lncRNA)在癌癥[7]、免疫[8]、炎癥[9]等許多生物學(xué)過程中具有重要作用。有研究發(fā)現(xiàn),lncRNA H19在上皮-間充質(zhì)轉(zhuǎn)化過程中介導(dǎo)卵巢癌細(xì)胞的DDP耐藥和遷移[10]。lncRNA H19表達(dá)在耐多柔比星的乳腺癌細(xì)胞中顯著上調(diào)[11]。但目前l(fā)ncRNA H19對(duì)乳腺癌DDP耐藥性的影響未見報(bào)道。據(jù)報(bào)道,在大鼠脊髓損傷模型中,電針通過下調(diào)H19/EZH2軸抑制Notch信號(hào)通路,從而促進(jìn)大鼠恢復(fù)[12]。沉默人乳腺癌MCF7細(xì)胞可促進(jìn)細(xì)胞凋亡[13]。沉默通過Notch/Snail通路可部分恢復(fù)結(jié)腸癌耐藥細(xì)胞株LoVo/5-FU對(duì)化療藥物的敏感性[14]。

        因此,本研究通過構(gòu)建耐DDP的人乳腺癌細(xì)胞株MCF7-Re,初步探討lncRNA H19對(duì)乳腺癌DDP敏感性的影響及其分子機(jī)制,以期為進(jìn)一步研究對(duì)抗乳腺癌DDP耐藥性的治療手段提供理論參考。

        材料和方法

        1 主要儀器與試劑

        人正常乳腺上皮細(xì)胞株MCF-10A(武漢普諾賽生命科技有限公司);人乳腺癌細(xì)胞株MCF7(武漢普諾賽生命科技有限公司);DDP(上海源葉生物科技有限公司;批號(hào):S31072);TUNEL染色試劑盒(上海碧云天生物技術(shù)有限公司;批號(hào):C1086);CCK-8試劑盒(Biosharp;批號(hào):BS350A);TRIzol試劑和Lipofectamine? 2000(Invitrogen);cDNA合成試劑盒(TaKaRa);引物序列及siRNA-H19和siRNA-NC質(zhì)粒(上海吉康生物科技有限公司);Bcl-2兔多克隆抗體(批號(hào):ab196495)、Bax兔單克隆抗體(批號(hào):ab32503)、cleaved caspase-3兔多克隆抗體(批號(hào):ab32042)、Notch1兔單克隆抗體(批號(hào):ab52627)、發(fā)狀分裂相關(guān)增強(qiáng)子1(hairy and enhancer of split 1, Hes1)兔多克隆抗體(批號(hào):ab71559)、β-actin兔多克隆抗體(批號(hào):ab8227)和辣根過氧化物酶(horseradish peroxidase, HRP)標(biāo)記的山羊抗兔IgG Ⅱ抗(批號(hào):ab6721)均購自Abcam;ATP結(jié)合盒蛋白B亞家族成員1(ATP-binding cassette protein subfamily B member 1, ABCB1)兔單克隆抗體(Cell Signaling Technology;批號(hào):13342);十二烷基硫酸鈉-聚丙烯酰胺凝膠電泳(sodium dodecyl sulfate-polyacrylamide gel electrophoresis, SDS-PAGE)及轉(zhuǎn)移裝置(上海優(yōu)寧維生物科技股份有限公司);LAS400凝膠成像系統(tǒng)(GE)。

        2 細(xì)胞培養(yǎng)、耐藥細(xì)胞構(gòu)建和轉(zhuǎn)染

        用含10%胎牛血清的RPMI-1640培養(yǎng)液在37 ℃、5% CO2的細(xì)胞培養(yǎng)箱中培養(yǎng)MCF-10A和MCF7細(xì)胞。通過使用DDP干預(yù)構(gòu)建耐DDP的MCF7細(xì)胞(MCF7-Re細(xì)胞)。使用含1 μmol/L DDP的培養(yǎng)液來維持DDP抗性,當(dāng)細(xì)胞處于對(duì)數(shù)生長(zhǎng)期時(shí),0.25%胰蛋白酶消化,調(diào)整細(xì)胞密度為5×107/L。取10 mL細(xì)胞懸液接種到培養(yǎng)瓶中培養(yǎng)24 h直至貼壁,首先加入0.5 μmol/L DDP孵育48 h,然后更換培養(yǎng)液。消化后,加入2.5 μmol/L DDP培養(yǎng)48 h。后續(xù)逐漸增加DDP濃度至5和10 μmol/L,得到耐受10 μmol/L DDP的MCF7-Re細(xì)胞。取對(duì)數(shù)生長(zhǎng)期細(xì)胞,使用Lipofectamine? 2000將siRNA-H19、siRNA-NC、Ov-NC或Ov-Notch1轉(zhuǎn)染至MCF7-Re細(xì)胞。轉(zhuǎn)染24 h后,更換培養(yǎng)液繼續(xù)培養(yǎng)24 h,收集細(xì)胞,RT-qPCR檢測(cè)質(zhì)粒干擾水平。

        3 主要方法

        3.1RT-qPCR使用TRIzol試劑從各實(shí)驗(yàn)組MCF7-Re細(xì)胞中提取總RNA,使用cDNA合成試劑盒將RNA反轉(zhuǎn)錄為cDNA,使用MiniOpticon real-time PCR檢測(cè)系統(tǒng)進(jìn)行PCR,以GAPDH為內(nèi)參照,檢測(cè)Notch1和lncRNA H19表達(dá)水平。Notch1的正向引物序列為5'-AGGCTCTGCCGACATCA-3',反向引物序列為5'-AGGAAGGGGTGCTCTGG-3';lncRNA H19的正向引物序列為5′-ATCGGTGCCTCAGCGTTCGG-3′,反向引物序列為5′-CTGTCCTCGCCGTCACACCG-3′;內(nèi)參照GAPDH的正向引物序列為5'-ACAACTTTGGTATCGTGGAAGG-3',反向引物序列為5'-GCCATCACGCCACAGTTTC-3'。

        3.2CCK-8法檢測(cè)細(xì)胞活力取對(duì)數(shù)生長(zhǎng)期的MCF7及MCF7-Re細(xì)胞,接種于96孔板中,每孔1.0×104個(gè)。細(xì)胞貼壁后,以不同劑量(0、2.5、5、10和20 μmol/L)的DDP處理24 h后加入10% CCK-8試劑,在細(xì)胞培養(yǎng)箱中培養(yǎng)4 h,酶標(biāo)儀檢測(cè)450 nm處吸光度,計(jì)算細(xì)胞相對(duì)活力。同時(shí),在使用siRNA-H19或siRNA-NC質(zhì)粒轉(zhuǎn)染MCF7-Re細(xì)胞后,以不同劑量(0、2.5、5、10和20 μmol/L)的DDP處理24 h,加入10% CCK-8試劑,在細(xì)胞培養(yǎng)箱中培養(yǎng)4 h,酶標(biāo)儀檢測(cè)450 nm處吸光度,計(jì)算細(xì)胞活力。根據(jù)CCK-8實(shí)驗(yàn)結(jié)果,使用20 μmol/L的DDP用于后續(xù)實(shí)驗(yàn)

        3.3TUNEL法檢測(cè)細(xì)胞凋亡取對(duì)數(shù)生長(zhǎng)期的MCF7-Re細(xì)胞,分為對(duì)照組、siRNA-NC組、siRNA-H19組、DDP組、DDP+siRNA-NC組和DDP+siRNA-H19組,取各組細(xì)胞進(jìn)行切片,使用二甲苯透明、梯度乙醇脫蠟,將各組細(xì)胞切片用蛋白酶處理20 min,之后用TUNEL反應(yīng)混合液于37 ℃避光孵育1 h,凋亡細(xì)胞會(huì)被染成綠色,在熒光顯微鏡下觀察(×400)。凋亡率(%)=陽性染色細(xì)胞數(shù)/總細(xì)胞數(shù)×100%

        3.4Western blot取對(duì)數(shù)生長(zhǎng)期的MCF7-Re細(xì)胞,分為對(duì)照組、siRNA-NC組、siRNA-H19組、DDP組、DDP+siRNA-NC組和DDP+siRNA-H19組。將接種細(xì)胞的6孔板置于冰上,PBS漂洗后加入裂解液提取總蛋白,測(cè)定蛋白濃度。煮沸變性蛋白樣品,以每孔50 μg蛋白進(jìn)行SDS-PAGE,70 V電壓下跑至分界面時(shí),變換電壓為110 V,300 mA恒流轉(zhuǎn)膜1 h,5%牛血清白蛋白封閉2 h,加入Bax、Bcl-2、cleaved caspase-3、ABCB1、Notch1、Hes1和β-actin抗體,4 ℃孵育過夜后加入Ⅱ抗,室溫孵育1 h,取出條帶,加入ECL顯影液上機(jī)檢測(cè),結(jié)果用ImageJ軟件對(duì)條帶進(jìn)行灰度值定量分析。

        4 統(tǒng)計(jì)學(xué)處理

        使用GraphPad Prism 8.1軟件處理數(shù)據(jù)。結(jié)果以均數(shù)±標(biāo)準(zhǔn)差(mean±SD)表示。兩組間均數(shù)比較采用檢驗(yàn);多組間均數(shù)比較采用單因素方差分析及LSD-檢驗(yàn)。以<0.05表示差異有統(tǒng)計(jì)學(xué)意義。

        結(jié)果

        1 lncRNA H19在耐藥的乳腺癌細(xì)胞株中表達(dá)增加

        圖1A顯示不同劑量的DDP處理MCF7及MCF7-Re細(xì)胞后細(xì)胞活力的變化。隨著DDP劑量的增加,MCF7及MCF7-Re細(xì)胞活力逐漸降低,MCF7細(xì)胞較MCF7-Re細(xì)胞活力下降更明顯(<0.01),說明耐DDP乳腺癌細(xì)胞株MCF7-Re構(gòu)建成功。圖1B顯示,與正常乳腺上皮細(xì)胞MCF-10A相比,乳腺癌細(xì)胞MCF7中l(wèi)ncRNA H19表達(dá)水平顯著上調(diào)(<0.01),表明lncRNA H19在乳腺癌中的可能發(fā)揮促癌作用;與MCF-10A和MCF7細(xì)胞相比,lncRNA H19的表達(dá)水平在MCF7-Re細(xì)胞中顯著增加(<0.01),說明lncRNA H19可能在乳腺癌耐藥過程中發(fā)揮作用。

        Figure 1. Expression of lncRNA H19 in cisplatin (DDP)-resistant breast cancer cells. A: the viability of MCF7 and MCF7-Re cells after DDP treatment was detected by CCK-8 assay; B: the expression of lncRNA H19 in MCF-10A, MCF7 and MCF7-Re cells was detected by RT-qPCR. Mean±SD. n=3. **P<0.01 vs MCF7; ##P<0.01 vs MCF10A.

        2 干擾lncRNA H19可增強(qiáng)MCF7-Re細(xì)胞對(duì)DDP的敏感性

        圖2A顯示,與siRNA-NC組相比,siRNA-H19組MCF7-Re細(xì)胞中H19的表達(dá)水平顯著降低(<0.01),說明干擾質(zhì)粒構(gòu)建成功。圖2B顯示,不同劑量的DDP處理后,與siRNA-NC組相比,siRNA-H19組細(xì)胞活力進(jìn)一步降低(<0.01)。圖2C~E顯示,與siRNA-NC相比,siRNA-H19組細(xì)胞凋亡率顯著提高(<0.01),Bax和cleaved caspase-3表達(dá)顯著增加,Bcl-2和ABCB1表達(dá)顯著減少(<0.01);與DDP+siRNA-NC組相比,DDP+siRNA-H19組細(xì)胞凋亡率顯著升高(P<0.001),Bax和cleaved caspase-3表達(dá)顯著增加,Bcl-2和ABCB1表達(dá)顯著減少(<0.01)。上述結(jié)果表明,干擾lncRNA H19可增強(qiáng)乳腺癌細(xì)胞對(duì)DDP的敏感性。

        Figure 2. Effect of lncRNA H19 knockdown on the sensitivity of breast cancer cells to cisplatin (DDP). A: the knockdown effect of siRNA-H19 in MCF7-Re cells was detected by RT-qPCR; B: the viability of MCF7-Re cells after DDP treatment was detected by CCK-8 assay; C: TUNEL staining was used to detect cell apoptosis; D: apoptosis-related proteins were detected by Western blot; E: drug resistance protein ABCB1 was detected by Western blot. The concentration of DDP in C, D and E was 20 μmol/L. Mean±SD. n=3. **P<0.01 vs siRNA-NC group; ##P<0.01 vs DDP+siRNA-NC group.

        3 干擾lncRNA H19可抑制MCF7-Re細(xì)胞中的Notch信號(hào)通路

        圖3顯示,與siRNA-NC相比,siRNA-H19組MCF7-Re細(xì)胞中Notch1和Hes1蛋白表達(dá)水平均顯著降低(<0.01),說明干擾H19抑制了Notch信號(hào)通路。

        Figure 3. The expression levels of Notch signaling pathway-related proteins in breast cancer cells after lncRNA H19 knockdown were detected by Western blot. Mean±SD. n=3. **P<0.01 vs siRNA-NC group.

        4 干擾lncRNA H19通過抑制Notch信號(hào)通路增強(qiáng)MCF7-Re細(xì)胞對(duì)DDP的敏感性

        圖4A、B顯示,與Ov-NC組相比,Ov-Notch1組的Notch1表達(dá)增加,說明Notch1的過表達(dá)質(zhì)粒構(gòu)建成功。圖4C顯示,以不同劑量的DDP處理MCF7-Re細(xì)胞后,與siRNA-H19+Ov-NC相比,siRNA-H19+Ov-Notch1組細(xì)胞活力降低趨勢(shì)減緩(<0.01)。圖4D~F顯示,以20 μmol/L DDP處理MCF7-Re細(xì)胞后,與DDP+siRNA-H19+Ov-NC相比,DDP+siRNA-H19+Ov-Notch1組細(xì)胞凋亡率顯著降低(<0.01),Bax和cleaved caspase-3表達(dá)顯著減少,Bcl-2和ABCB1表達(dá)顯著增加(<0.01)。上述結(jié)果表明,干擾lncRNA H19可通過抑制Notch信號(hào)通路增強(qiáng)乳腺癌對(duì)DDP的敏感性。

        Figure 4. Knockdown of lncRNA H19 enhanced the sensitivity of breast cancer cells to cisplatin (DDP) by inhibiting Notch signaling pathway. A and B: RT-qPCR and Western blot were used to detect the overexpression of Notch1; C: the viability of MCF7-Re cells after DDP treatment was detected by CCK-8 assay; D: TUNEL staining was used to detect cell apoptosis; E: apoptosis-related proteins were detected by Western blot; F: drug resistance protein ABCB1 was detected by Western blot. The concentration of DDP in D, E and F was 20 μmol/L. Mean±SD. n=3. *P<0.05, **P<0.01 vs control or Ov-NC group; ##P<0.01 vs siRNA-H19+Ov-NC group; ▲▲P<0.01 vs DDP group; △△P<0.01 vs DDP+siRNA-H19+Ov-NC group.

        討論

        乳腺癌作為對(duì)女性健康危害嚴(yán)重的疾病之一,目前化療仍是治療乳腺癌的最有效方法,但臨床上經(jīng)常發(fā)生腫瘤多藥耐藥[15]。DDP耐藥是一個(gè)多因素的過程,乳腺癌患者的化療耐藥嚴(yán)重限制了治療效果,因此研究耐藥產(chǎn)生機(jī)制對(duì)乳腺癌的治療具有深遠(yuǎn)意義[16]。lncRNA是一類長(zhǎng)度大于200 nt的非編碼RNA。lncRNA H19被認(rèn)為是一種癌胚轉(zhuǎn)錄物,在幾種腫瘤中表達(dá)失調(diào),導(dǎo)致惡性組織中l(wèi)ncRNA H19異常上調(diào)[17]。研究發(fā)現(xiàn),敲減lncRNA H19通過調(diào)節(jié)乳腺癌細(xì)胞中的miR-130a-3p/SATB1抑制細(xì)胞增殖并誘導(dǎo)細(xì)胞凋亡[18]。

        在本研究中,我們首先構(gòu)建了MCF7-Re耐藥細(xì)胞株,RT-qPCR結(jié)果表明lncRNA H19在MCF7-Re細(xì)胞中表達(dá)增加。接著構(gòu)建了lncRNA H19干擾質(zhì)粒siRNA-H19,干擾H19表達(dá)可加速DDP處理后的MCF7-Re細(xì)胞活力的降低,促進(jìn)了細(xì)胞凋亡。已知Bcl-2/Bax/cleaved caspase-3是凋亡相關(guān)蛋白,下調(diào)caspase-3和Bax以及上調(diào)Bcl-2可抑制細(xì)胞凋亡[19]。Western blot結(jié)果表明,siRNA-H19降低了DDP處理后MCF7-Re細(xì)胞中Bcl-2蛋白水平并提高了Bax和cleaved caspase-3蛋白水平,說明敲減H19可抑制DDP處理后的MCF7-Re細(xì)胞凋亡。ABCB1是一種經(jīng)典的多藥耐藥蛋白,circRNA_103615沉默顯著降低了DDP對(duì)A549細(xì)胞的IC50,并降低了ABCB1的表達(dá)水平[20]。本研究中,siRNA-H19降低了MCF7-Re細(xì)胞中耐藥蛋白ABCB1的表達(dá)水平,表明敲減H19減輕了MCF7-Re細(xì)胞的DDP耐藥性,提高了細(xì)胞對(duì)DDP的化療敏感性。

        Notch通路是一種高度保守的信號(hào)通路,在胚胎發(fā)育、器官成熟及腫瘤進(jìn)展中發(fā)揮重要作用[21]。研究表明,Notch1的抑制顯著下調(diào)MCAM表達(dá),導(dǎo)致TNBC細(xì)胞對(duì)順鉑的化學(xué)耐藥性的逆轉(zhuǎn)[22]。Zhang等[23]報(bào)道,在乳腺癌細(xì)胞株MCF7中上調(diào)Notch1表達(dá)可誘導(dǎo)上皮-間充質(zhì)轉(zhuǎn)化,促進(jìn)細(xì)胞侵襲和遷移。因此我們推測(cè)抑制Notch1信號(hào)可能會(huì)降低乳腺癌細(xì)胞的DDP耐藥性。有研究表明,H19能夠激活Notch信號(hào)蛋白的表達(dá)[12]。本研究中,Western blot結(jié)果表明,siRNA-H19降低了MCF7-Re細(xì)胞中Notch1和Hes1蛋白的表達(dá),說明干擾H19抑制Notch1信號(hào)通路。同時(shí),構(gòu)建Notch1過表達(dá)質(zhì)粒激活Notch1信號(hào),減緩了DDP處理后MCF7-Re細(xì)胞活力降低的趨勢(shì),抑制了細(xì)胞凋亡,并且上調(diào)了耐藥蛋白ABCB1的表達(dá)。這表明過表達(dá)Notch1逆轉(zhuǎn)了干擾lncRNA H19對(duì)乳腺癌細(xì)胞耐藥的抑制作用。

        綜上所述,本研究發(fā)現(xiàn)干擾lncRNA H19通過抑制Notch1信號(hào)通路進(jìn)一步降低DDP處理后的MCF7-Re細(xì)胞活力,促進(jìn)細(xì)胞凋亡,減少耐藥蛋白ABCB1表達(dá),進(jìn)而增強(qiáng)乳腺癌細(xì)胞對(duì)DDP的敏感性。目前本研究只局限于體外細(xì)胞實(shí)驗(yàn),而機(jī)體內(nèi)作用機(jī)制復(fù)雜,往往能反映真實(shí)情況,后續(xù)將繼續(xù)進(jìn)行體內(nèi)實(shí)驗(yàn)研究。

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        [2] W?rmann B. Breast cancer: basics, screening, diagnostics and treatment[J]. Med Monatsschr Pharm, 2017, 40(2):55-64.

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        [4] Maruthanila VL, Elancheran R, Kunnumakkara AB, et al. Recent development of targeted approaches for the treatment of breast cancer[J]. Breast Cancer, 2017, 24(2):191-219.

        [5] Makovec T. Cisplatin and beyond: molecular mechanisms of action and drug resistance development in cancer chemotherapy[J]. Radiol Oncol, 2019, 53(2):148-158.

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        [8] Robinson EK, Covarrubias S, Carpenter S. The how and why of lncRNA function: an innate immune perspective[J]. Biochim Biophys Acta Gene Regul Mech, 2020, 1863(4):194419.

        [9] Liao K, Xu J, Yang W, et al. The research progress of LncRNA involved in the regulation of inflammatory diseases[J]. Mol Immunol, 2018, 101:182-188.

        [10] Wu Y, Zhou Y, He J, et al. Long non-coding RNA H19 mediates ovarian cancer cell cisplatin-resistance and migration during EMT[J]. Int J Clin Exp Pathol, 2019, 12(7):2506-2515.

        [11] Wang Y, Zhou P, Li P, et al. Long non-coding RNA H19 regulates proliferation and doxorubicin resistance in MCF-7 cells by targeting PARP1[J]. Bioengineered, 2020, 11(1):536-546.

        [12] Geng X, Zou Y, Li S, et al. Electroacupuncture promotes the recovery of rats with spinal cord injury by suppressing the Notch signaling pathway via the H19/EZH2 axis[J]. Ann Transl Med, 2021, 9(10):844.

        [13] 袁磊, 陳旭東, 范文娟, 等. 沉默基因促進(jìn)人乳腺癌MCF-7細(xì)胞JNK1和p53磷酸化[J]. 中國(guó)病理生理雜志, 2013, 29(6):1014-1019.

        Yuan L, Chen XD, Fan WJ, et al. Silencinggene promotes phosphorylation of JNK1 and p53 in human breast cancer MCF-7 cells[J]. Chin J Pathophysiol, 2013, 29(6):1014-1019.

        [14] 李霞, 馬超, 孔令偉, 等. EphA2調(diào)控結(jié)直腸癌細(xì)胞耐藥的初步研究[J]. 中國(guó)病理生理雜志, 2017, 33(12):2188-2194.

        Li X, Ma C, Kong LW, et al. A preliminary study on the regulation of drug resistance in colorectal cancer cells by EphA2[J]. Chin J Pathophysiol, 2017, 33(12):2188-2194.

        [15] 黃果, 王佑權(quán), 陳娟. miRNA-138-5p靶向抑制HIF-1α表達(dá)對(duì)乳腺癌MCF-7細(xì)胞順鉑耐藥的逆轉(zhuǎn)作用及其機(jī)制[J]. 吉林大學(xué)學(xué)報(bào)(醫(yī)學(xué)版), 2021, 47(2):360-368.

        Huang G, Wang YQ, Chen J. miRNA-138-5p targeted inhibition of HIF-1α expression reverses cisplatin resistance in breast cancer MCF-7 cells and its mechanism[J]. J Jilin Univ (Med Ed), 2021, 47(2):360-368.

        [16] Mi H, Wang X, Wang F, et al. SNHG15 contributes to cisplatin resistance in breast cancer through sponging miR-381[J]. Onco Targets Ther, 2020, 13:657-666.

        [17] Ghafouri-Fard S, Esmaeili M, Taheri M. H19 lncRNA: roles in tumorigenesis[J]. Biomed Pharmacother, 2020, 123:109774.

        [18] Zhong G, Lin Y, Wang X, et al. H19 knockdown suppresses proliferation and induces apoptosis by regulating miR-130a-3p/SATB1 in breast cancer cells[J]. Onco Targets Ther, 2020, 13:12501-12513.

        [19] Zheng Z, Xiao Z, He YL, et al. Heptapeptide isolated fromexhibited anti-photoaging potential via MAPK/AP-1/MMP pathway and anti-apoptosis in UVB-irradiated HaCaT cells[J]. Mar Drugs, 2021, 19(11):626.

        [20] Liang H, Lin Z, Lin H, et al. circRNA_103615 contributes to tumor progression and cisplatin resistance in NSCLC by regulating ABCB1[J]. Exp Ther Med, 2021, 22(3):934.

        [21] Krishna BM, Jana S, Singhal J, et al. Notch signaling in breast cancer: from pathway analysis to therapy[J]. Cancer Lett, 2019, 461:123-131.

        [22] Zeng D, Liang YK, Xiao YS, et al. Inhibition of Notch1 reverses EMT and chemoresistance to cisplatin via direct downregulation of MCAM in triple-negative breast cancer cells[J]. Int J Cancer, 2020, 147(2):490-504.

        [23] Zhang X, Zhao X, Shao S, et al. Notch1 induces epithelial-mesenchymal transition and the cancer stem cell phenotype in breast cancer cells and STAT3 plays a key role[J]. Int J Oncol, 2015, 46(3):1141-1148.

        Knockdown of lncRNA H19 enhances drug sensitivity of cisplatin-resistant breast cancer cells through Notch signaling pathway

        SHI Wen-biao, JIN Xiao-yan, PANG Wen-yang, WANG Yuan-fan, WANG Zheng-yi, ZHANG Qiang△

        (,,318000,)

        To investigate the effect of long non-coding RNA (lncRNA) H19 on cisplatin/cis-diamminodichloroplatinum (DDP) resistance in breast cancer cells and its molecular mechanism.A DDP-resistant human breast cancer cell line MCF7-Re was constructed. RT-qPCR was used to detect the expression levels of lncRNA H19 in human normal breast epithelial cell line MCF10A, and human breast cancer cell lines MCF7 and MCF7-Re. The lncRNA H19 interference plasmid was constructed, and CCK-8 assay was used to detect the viability of MCF7-Re cells after DDP treatment. The cell apoptosis was detected by TUNEL. The protein levels of Bcl-2, Bax, cleaved caspase-3, ATP-binding cassette protein subfamily B member 1 (ABCB1), Notch1, and hairy and enhancer of split 1 (Hes1) were detected by Western blot. The Notch1 overexpression plasmid was constructed, and then was used in reversal experiments.The expression of lncRNA H19 was increased in MCF7-Re cells (<0.01). Knockdown of H19 further reduced the cell viability and the ABCB1 expression, but increased the apoptosis rate of MCF7-Re cells after treated with DDP (<0.01). The expression of Bax and cleaved caspase-3 was increased (<0.01), while the expression of Bcl-2 and Notch signaling pathway-related proteins (Notch1 and Hes1) was inhibited (<0.01). Overexpression of Notch1 increased the cell viability and the ABCB1 expression, but decreased the apoptosis rate of MCF7-Re cells after knockdown of lncRNA H19 (<0.01). The protein expression of Bcl-2 was increased (<0.01), while the protein expression of Bax and cleaved caspase-3 was decreased (<0.01).Knockdown of lncRNA H19 inhibits the proliferation of DDP-resistant breast cancer cells and enhances their sensitivity to DDP by inhibiting Notch signaling pathway.

        Long non-coding RNA H19; Breast cancer; Cisplatin; Drug resistance; Notch signaling pathway

        1000-4718(2022)09-1585-07

        2022-04-26

        2022-07-14

        15824092996; E-mail: zhangqq1975@163.com

        R737.9; R363.2

        A

        10.3969/j.issn.1000-4718.2022.09.007

        [基金項(xiàng)目]2021年臺(tái)州市科技計(jì)劃項(xiàng)目(No. 21ywa37)

        (責(zé)任編輯:林白霜,羅森)

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