CN106801058B - 一种与卵巢癌和子宫内膜癌相关的长链非编码RNA-DLEU1的siRNA和应用 - Google Patents
一种与卵巢癌和子宫内膜癌相关的长链非编码RNA-DLEU1的siRNA和应用 Download PDFInfo
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Abstract
本发明属于肿瘤分子生物学领域,尤其涉及一种与卵巢癌和子宫内膜癌相关的长链非编码RNA‑DLEU1的siRNA和应用。所述的siRNA的sense和antisense的核苷酸序列分别为:GCAGUCUGUUCUGAACAUA;UAUGUUCAGAACAGACUGC。该长链非编码RNA DLEU1与癌细胞的增殖、凋亡能力相关,针对其设计的siRNA可应用于抗卵巢癌和子宫内膜癌的药物的制备。
Description
技术领域
本发明属于肿瘤分子生物学领域,尤其涉及一种与卵巢癌和子宫内膜癌相关的长链非编码RNA-DLEU1的siRNA和应用。
背景技术
卵巢癌是生殖系统肿瘤相关死亡中最常见的原因,多数患者被诊断时肿瘤已进展至晚期,五年生存率低于30%。2016年美国癌症统计数据显示,超过22000例新发卵巢癌患者被确诊,其中14000例以上患者死亡与之密切相关;内膜癌是另一种常见的生殖系统恶性肿瘤,在我国妇科恶性肿瘤中的发病率仅次于宫颈癌,居第二位,在某些发达国家发病率已占据首位,且逐年上升并伴有年轻化趋势。两种癌症严重威胁了女性生命健康,早期诊断和合理的治疗,对于提高患者的生存率及生活质量至关重要。
目前,用于临床的早期筛查方法及诊断指标尚不理想,分子靶向治疗前景受到广泛关注。Long non-coding RNAs (LncRNAs)是长度大于200个核苷酸的RNA,因缺乏有意义的开放读码框,不能编码蛋白质。近年来发现其强大的基因调节功能,参与多种病理生理进程,并且在癌症发生发展中也起到重要的作用。Dleu1定位于染色体13q14.3条带特定区域,编码一种长链非编码RNA,在慢性淋巴细胞白血病、多发性骨髓瘤等造血系统恶性肿瘤中频繁敲除,是最具潜力的抑癌基因之一。该基因的缺失还见于不典型梭形脂肪细胞瘤中,但是在乳腺癌中DLEU1却呈现高表达。
然而,卵巢癌、子宫内膜癌发生的分子机制尚不清楚,深入研究卵巢癌、子宫内膜癌相关基因的异常表达机制,将有助于其早期诊断、预防及治疗,具有重要的意义。
发明内容
针对上述问题,本发明提供一种与卵巢癌和子宫内膜癌相关的长链非编码RNADLEU1的siRNA和应用。该长链非编码RNA DLEU1与癌细胞的增殖、凋亡能力相关,针对其设计的siRNA可应用于抗肿瘤的药物的制备。
为了实现上述目的,本发明提供一种与卵巢癌和子宫内膜癌相关的长链非编码RNA DLEU1,其DNA序列如SEQ.ID. NO.1所示;针对该长链非编码RNA设计的siRNA,所述的siRNA的sense和antisense的核苷酸序列分别如SEQ.ID.NO.2和SEQ.ID.NO.3所示。
SEQ.ID.NO.2 :GCAGUCUGUUCUGAACAUA。
SEQ.ID.NO.3 :UAUGUUCAGAACAGACUGC。
所述的与卵巢癌和子宫内膜癌相关的长非编码RNA的siRNA可以用于制备抗卵巢癌和子宫内膜癌药物。
所述的长链非编码RNA DLEU1还可以对于卵巢癌和子宫内膜癌诊断以及其作为分子靶点的应用。
本发明的有益效果。
本发明首次发现LncRNA DLEU1在卵巢癌和子宫内膜癌患者中的表达均高于正常卵巢组织和子宫内膜组织;LncRNA DLEU1表达异常和卵巢癌、子宫内膜癌的发生与发展的相关性,为卵巢癌和子宫内膜癌的LncRNA的临床治疗和科学研究提供了基础。
本发明提供的与卵巢癌和子宫内膜癌相关的LncRNA,是由上海SIGMA生物公司独家的Rosetta算法,确保基因设计时的高效特异性基础上设计siRNA序列;其质粒序列由苏州吉玛基因股份有限公司设计。分别将质粒载体和si-RNA干扰片段转染到卵巢癌细胞系A2780、OVCAR3及子宫内膜癌细胞系HEC-1B、Ishikawa中,发现利用该基因特异性的siRNA转染,A2780、OVCAR3、HEC-1B细胞增殖能力下降,凋亡细胞比例上升。
DLEU1可以作为卵巢癌和子宫内膜癌诊断的生物标记和治疗的靶点,采用特异性的siRNA或者小分子药物,沉默或者降低肿瘤组织中的DLEU1的表达,可成功用于卵巢癌和子宫内膜癌的临床治疗中。
附图说明
图1 lncRNA DLEU1在正常卵巢组织、卵巢良性肿瘤组织、交界性卵巢肿瘤组织以及卵巢癌组织中的表达情况。
图2 lncRNA DLEU1在正常子宫内膜组织和子宫内膜癌组织中的表达差异。
图3转染质粒过表达和siRNA敲除效率,卵巢癌OVCAR3,A2780细胞以及子宫内膜癌HEC-1B细胞。
图4应用人工构建质粒增加DLEU1表达,以及siRNA干扰DLEU1表达后,卵巢癌细胞OVCAR3、A2780以及子宫内膜癌细胞HEC-1B的MTT增殖曲线。
图5检测过表达和沉默DLEU1对三种细胞凋亡的影响。
具体实施方式
下面结合具体实施例对本发明做进一步的说明。以下实施例将有助于对本发明的了解,但这些实施例仅为了对本发明加以说明,本发明并不限于这些内容。在实施例中未作特殊说明的操作方法均为本技术领域常规操作方法。
实施例1。
1、标本采集。
在患者知情的情况下,于术中采集卵巢癌、正常卵巢组织及子宫内膜癌组织、正常子宫内膜组织标本,生理盐水清洗后,保存于液氮或-80℃超低温冰箱中,备用;组织标本于2014年6月-2016年6月,在中国医科大学附属第一医院手术室,由陈医生采集。
2、引物设计。
PCR检测所用引物。
上游引物(SEQ.ID.NO.4):TAGAAGAGCCAACCAAC。
下游引物(SEQ.ID.NO.5):TCTCCCAGATACGACAC。
3、应用qRT-PCR方法分别检测DLEU1在卵巢癌、正常卵巢组织及子宫内膜癌组织、正常子宫内膜组织的表达量。
3.1、收集的组织标本总RNA提取。
将收集正常卵巢,卵巢良性肿瘤,交界性卵巢肿瘤以及卵巢癌标本组织标本以及正常子宫内膜癌和癌旁组织标本组织标本,分别用Trizol冰浴匀浆,以备提取总RNA;加入Trizol的1/5体积量的氯仿,剧烈振荡15秒,待溶液充分乳化后,室温静置5分钟;4℃条件下,12,000g离心处理20分钟,吸取上清液转移至另一个新的离心管中,向上清液中加入等体积的异丙醇,上下颠倒离心管充分混匀后,在30℃下静置10分钟;4℃条件下,12,000g离心处理20分钟,弃去上清,沿管壁加入lml的75%的乙醇,上下颠倒洗涤离心管管壁,4℃条件下12,000g离心处理10分钟后,弃去乙醇,室温干燥沉淀5-10分钟,加入适量(10-20ul)的RNase-free水溶解沉淀后,用UV-2800A型紫外可见分光光度计测定RNA浓度和纯度(定量RNA浓度1ug/ul,OD260/OD280 1.8-2.0之间表示RNA纯度较高)。
3.2、逆转录合成cDNA。
采用 GoScript 反转录系统(A5000、A5001),按照以下操作步骤进行反转录得到的 cDNA。
第一步:取一定量模板 RNA 加入引物。
RNA ( 1µg/μl) 5μl。
Random Primers (0.5 µg /μl) 1 μl。
Oligo(dT)15 Primer (0.5 µg/μl) 1 μl。
Nuclease-Free Water (加至 10 μl) 3μl。
第二步:将模板 RNA 与引物( Random Primers和Oligo(dT)15 Primer)的混合物进行 70℃、5 min 预变性,完成后取出置于冰上。
第三步:配制 RT -Mix,向每个样品管加入 10 μl。
组分 反转录混合液 终浓度。
Nuclease-Free Water 1.6 μl。
GoScript™ 5X Reaction Buffer 4 μl 1X。
MgCl2 (25 mM) 2 μl 2.5mM。
PCR Nucleotide Mix 1 μl 0.5mM。
Recombinant RNasin® Ribonuclease Inhibitor 0.4 μl 20units。
GoScript™ Reverse Transcriptase 1 μl。
第四步:设置反转录程序,包括退火、延伸、逆转录酶失活三步(退火25℃ 5min,延伸42℃ 60 min,失活70℃ 15 min,4℃ + ∞。程序完成后得到 cDNA。
3.3、Real-time PCR。
(1)按下列配置PCR反应混合液(反应液配置可在室温进行),并分至各反应管,然后加入2ul模板。
组分 体积(20ul反应体系) 终浓度。
Nuclease-Free Water 7μl。
上游引物(10 uM) 0.4ul 0.2uM。
下游引物(10 uM) 0.4ul 0.2uM。
GoTaq®qPCR Master Mix,2X 10ul 1X。
CXR 100X 0.2ul 1X。
(2)采用ABI PRISM®7500 Real-Time PCR System,两步法进行PCR标准扩增程序。
(3)导出数据,Realtime PCR结果用2-△△CT法进行分析。利用Graphad Prism软件分别绘制出卵巢癌和正常卵巢组织、子宫内膜癌及正常子宫内膜组织DLEU1在正常卵巢、良性病变、交界性肿瘤标本中表达水平的图表,见图1-1,由图可见,相比于正常卵巢组织、卵巢良性肿瘤、交界性卵巢肿瘤,DLEU1在卵巢癌组织中的表达明显升高(P<0.05),图1-2表明lncRNA DLEU1表达与肿瘤去分化呈正相关;1-3表示 lncRNA DLEU1表达与FIGO分期呈正相关(根据国际妇产科学联合会(FIGO)分期系统I期与II-IV期)*P <0.05;在子宫内膜癌和癌旁组织中DLEU1表达水平的图表,见图2,由图可见,DLEU1在子宫内膜癌和正常子宫内膜组织中呈现显著差异(*P<0.05)。
4、siRNA设计、筛选。
卵巢癌细胞株A2780、OVCAR3购自中科院细胞库,子宫内膜癌细胞株HEC-1B购自中科院细胞库,细胞培养基DMEM/RPMI 1640和胎牛血清均购自HyClone公司,DLEU1质粒表达载体购自苏州吉玛技术有限公司,采用Design2.0设计了3组siRNA干扰片段序列(起始设计位点分别为616、1315、1535),由上海SIGMA生物公司合成。RNA抽提试剂RNAiso Plus购自宝生物工程有限公司,逆转录试剂盒High Capacity cDNA Reverse Transcription Kits购自Invitrogen公司,定量PCR试剂盒Power SYBR Green PCR Master Mix购自Invitrogen公司,DLEU1基因和管家基因18S引物由上海生工生物工程技术服务有限公司合成。
细胞培养与转染:卵巢癌细胞A2780和OVCAR3、子宫内膜癌细胞HEC-1B用含10%的胎牛血清细胞培养基,于37℃,5%CO2的培养箱中培养,按照1.5×105 /孔(依据细胞种类而定)接种于6孔板生长至30%-50%融合度时,按照lipofectamine2000(Introvegen)说明书进行转染,lopofectamine2000试剂每孔加5ul,以100ul无血清培养基稀释,轻柔混匀,短暂离心静置5min,siRNA(20pM/ul)5ul/DLEU1质粒1.6μg、以100ul无血清1640培养基稀释,轻柔混匀,短暂离心静置5min;5min后将lipofectamine2000试剂与siRNA/质粒混匀,离心静置20min。将混悬液滴加入6孔板内,孔内预先加入含血清培养基每孔2ml。
48h后提取细胞总RNA,采用QRT-PCR检测DLEU1高表达和沉默水平;结果如图3,3-1至3-3表示在卵巢癌OVCAR3(图3-1)、A2780(图3-2)和HEC-1B(图3-3)细胞系稳定转染DLEU1,使之高表达4-8倍,3-4至3-6表示利用siRNA转染OVCAR3(图3-4)、A2780(图3-5)和HEC-1B(图3-6)细胞系,基因沉默效率达到80%。
在巢癌细胞系以及内膜癌细胞系分别过表达/沉默DLEU1,MTT增殖实验分析细胞增殖情况,结果见图4,p<0.05,4-1至4-3结果显示,高表达DLEU1基因后,OVCAR3(图4-1)、A2780(图4-2)和HEC-1B(图4-3)细胞系增殖速率明显加快;4-4至4-6结果表明,沉默该基因,OVCAR3(图4-4)、A2780(图4-5)和HEC-1B(图4-6)细胞系生长受到显著抑制。
转染高表达或沉默DLEU1基因后,采用流式细胞分析技术检测细胞凋亡比例,p<0.05, 见图5,5-1至5-3结果发现DLEU1表达增加时,OVCAR3(图5-1)、A2780(图5-2)和HEC-1B(图5-3)细胞凋亡比例下降,5-4至5-6结果表明,沉默该基因,OVCAR3(图5-4)、A2780(图5-5)和HEC-1B(图5-6)细胞凋亡显著增加。
综上所述,针对DLEU1设计的si-RNA,特异性降低DLEU1表达,可用于卵巢癌、内膜癌的临床治疗。
序列表
<110>中国医科大学附属第一医院
<120>一种与卵巢癌和子宫内膜癌相关的长链非编码RNA-DLEU1的siRNA和应用
<160>5
<210>1
<211>1448
<212>DNA
<213>长链非编码RNA DLEU1的核苷酸序列
<400>1
aggcacatgc gcagaatcat cgtggtgcac ggctctccct ttgcttcttc ggttgcagtc 60
ctcttgcttc ttgcgcgtgc gtgtagcgct tttgcaaagc cgcggaggtg aagtgaactt 120
agaggttgtg gggccgaggg gtcgtcttat agctaccagc ccacaggcat ttagtctacg 180
ttggaggtaa acaaatacgg gtcctgctta ggagaaaaga aaaacgtctt acagccagtg 240
tctaaactcc aaacaacgga atgtatcaat gagaccttgt atatggatac acgtgcattt 300
aaaaccgccc tgccggcttg tagagctttt gccgttctcc agcgctttac aggggttatc 360
gcacttaagc ctcggaacaa ctttaccaga tgaggacacc tgaggttcag attaagaaat 420
ctgccccaaa gtcttagaac tggtattctc cactggttga atgcaaatgg aagccagagg 480
aaaagggaac ccttgacaca gttttcatat agattggcct ccagggcaga cagcagttgc 540
tctggctata tcaaataaaa gtgtcaagag tgagcatcct tgccttgtgc tgaatcacaa 600
aggaatacct ttcagttttt ctccattgat tatgatagca gtgggctttt cacagtgggc 660
tttactgtgt tgaggtaccc taatgacaag ttcaccccag tgttttctga ggagtctacc 720
tggaaatgag aaccatctgt ccttcctata gtagttcttc tcagaatgcc gactctatgc 780
taatggagga ggtctgatgg ccgggaggac aggaagaagg aacccacaat gaagcaaaag 840
ttgcgtttaa ctctgtcctc accattcctc tcctggacct gtcctaaact ggaagctggg 900
ggaggatgga gtgctggaat gctgcagaag tctcatggga gggcgcctgg tgttcaccac 960
atgtgtacac tgttgcacga ccagatggaa atttgaatgc tggggctcag tggaacacct 1020
gaaggaagct ggtgaggcag atgtcccgct atgccttcca agtgtcatgc aaccagttca 1080
tgcctgtcag catctctgcc ggtggactct gtgagtcagc aaatctacag agcagagagc 1140
cacaagtggg gacagatgtg gtcaaatgcc atttaaatca gtgattctca acccaggagt 1200
tgtcatggca ctggccttga gtgagctgga ccaagggaag tggtagaatt ccccatgaag 1260
gaccaagtga gcagatagaa gtttctccat tttaactttt tctgagtcaa tttaaaaaac 1320
acctagtgcc tttttctgta catagtgcct gtgggtttga atttaagcct acccaaatgt 1380
gcttttatcc cacctatttt gaaccttgca tgtctccggg ataagaatta acataagcta 1440
taaatatt 1448
<210>2
<211>19
<212>RNA
<213>外引物sense
<400>2
gcagucuguu cugaacaua 19
<210>3
<211>19
<212>RNA
<213>外引物antisense
<400>3
uauguucaga acagacugc 19
<210>4
<211>17
<212>DNA
<213>人工序列
<400>4
tagaagagcc aaccaac 17
<210>5
<211>17
<212>DNA
<213>人工序列
<400>5
tctcccagat acgacac 17
Claims (1)
1.一种与卵巢癌和子宫内膜癌相关的长链非编码RNA DLEU1的siRNA在制备抗卵巢癌和子宫内膜癌药物中的应用,其特征在于,所述的siRNA的sense和antisense的核苷酸序列分别如SEQ.ID.NO.2和SEQ.ID.NO.3所示:
SEQ.ID.NO.2 :GCAGUCUGUUCUGAACAUA;
SEQ.ID.NO.3 :UAUGUUCAGAACAGACUGC。
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Non-Patent Citations (4)
Title |
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《DLEU1 contributes to ovarian carcinoma tumourigenesis and development by interacting with miR-490-3p and altering CDK1 expression》;Wang Li-Li等;《Journal of cellular and molecular medicine》;20171130;第21卷(第11期);第3055-3065页 * |
《DLEU1 siRNA Gene Knockdown IN BURKITT LYMPHOMA (bl) IS ASSOCIATED with A SIGNIFICANT Decrease IN Cyclophosphamide (CY) and/or Rituximab Induced Apoptosis: Mechanism of Drug Resistance in BL》;Day Nancy等;《Blood》;20091208;第114卷(第22期);第765页 * |
《lncRNA DLEU1 contributes to tumourigenesis and development of endometrial carcinoma by targeting mTOR》;Du Yuping等;《Molecular Carcinogenesis》;20180510;第57卷(第9期);第1191-1200页 * |
《Long non-coding RNA DLEU1 contributes to the development of endometrial cancer by sponging miR-490 to regulate SP1 expression》;Shao Wenjing等;《Pharmazie》;20180731;第73卷(第7期);第379-385页 * |
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