家蚕磷酸吡哆醇氧化酶基因的表达谱分析

【目的】了解家蚕Bombyx mori维生素B6关键代谢酶磷酸吡哆醇氧化酶（pyridoxine- 5′-phosphate oxidase, PNPO）基因在家蚕不同发育阶段及5龄幼虫不同组织中的表达差异。【方法】将家蚕PNPO基因的重组表达质粒pET-22b(+)-PNPO转化入大肠杆菌Escherichia coli Rosetta中诱导表达, 纯化蛋白制备多克隆抗体。分别采用荧光定量PCR和Western blot方法对家蚕PNPO基因进行了转录水平和翻译水平的表达分析。【结果】在家蚕发育水平上, 5龄幼虫的PNPO翻译量为最高。PNPO基因在5龄幼虫各组织中的转录水平由高到低依次为精巢、 头、 中肠、 马氏管、 卵巢、 表皮、 脂肪体、 丝腺; 翻译量也以精巢为最高, 其次是头、 中肠和马氏管。【结论】明确了PNPO在家蚕各发育阶段及5龄幼虫各组织中的表达情况。     

外源激素处理后家蚕吡哆醛激酶和磷酸吡哆醇氧化酶转录水平的变化

【目的】研究家蚕 Bombyx mori 经蜕皮激素(20-hydroxyecdysone, 20-E)和保幼激素类似物(juvenile hormone analogue, JHA)处理后引起吡哆醛激酶(pyridoxal kinase, PLK)和磷酸吡哆醇氧化酶(pyridoxine-5′-phosphate oxidase, PNPO)的转录水平变化,为进一步研究激素对蚕体营养代谢等工作奠定基础。【方法】以20-E和JHA分别喂食不同发育时期(5龄第1, 3和5天)的家蚕幼虫,以喂食蒸馏水的家蚕为对照,采用实时荧光定量PCR(real-time quantitative PCR)方法在处理后24 和48 h对各组幼虫后部丝腺中PLP合成酶PLK和PNPO的转录水平进行分析。【结果】5龄第1天幼虫经20-E处理24和48 h后,PLK和PNPO的转录水平出现上调且与对照的差异达到极显著 (P＜0.01);5龄第3天幼虫经20-E处理,PLK的转录水平在48 h出现下调且与对照的差异达到显著(P＜0.05),PNPO的转录水平在24 和48 h均出现上调且与对照的差异达到极显著 (P＜0.01);5龄第5天幼虫经20-E处理后PLK和PNPO的转录水平无变化。5龄第1天幼虫经JHA处理后PLK和PNPO的转录水平未受到影响;5龄第3天幼虫经JHA处理后,PLK的转录水平在48 h出现显著下调且与对照的差异达到显著(P＜0.05),PNPO的转录水平在24和48 h后均出现显著下调且与对照的差异达到极显著(P＜0.05);5龄第5天幼虫经JHA处理24和48 h后,PLK和PNPO的转录水平出现下调且与对照的差异达到极显著 (P＜0.01)。【结论】20-E和JHA显著影响家蚕5龄幼虫PLK和PNPO的转录水平,20-E提高5龄前期家蚕PLK和PNPO的转录水平,JHA降低5龄后期它们的转录水平,为深入研究激素对VB₆的调控奠定基础。     

Bmttv在家蚕翅发育过程中的功能分析

【目的】探析家蚕Bombyx mori糖基转移酶基因Bmttv在家蚕翅发育过程中的功能。【方法】通过RACE克隆家蚕Bmttv的CDS全长序列并进行生物信息学分析；使用qRT-PCR检测Bmttv在家蚕不同发育阶段(5龄幼虫、游走期幼虫、预蛹、蛹和成虫)和5龄幼虫不同组织(表皮、翅原基、精巢、马氏管、气管、丝腺、头、血淋巴、脂肪体和中肠)中的表达量；构建过表达载体，瞬时转染BmE细胞，通过免疫荧光对BmTTV进行亚细胞定位，利用qRT-PCR检测家蚕翅发育关键基因BmHippo,Bmwg,BmDpp,Bmsotv和BmHh的表达量。【结果】成功克隆到家蚕Bmttv的CDS全长序列，长2 228 bp; BmTTV蛋白具有两个特殊结构域，均与硫酸肝素聚糖(heparan sulfate proteoglycans, HSPGs)的合成相关，与黑腹果蝇Drosophila melanogaster和智人Homo sapiens TTV的氨基酸序列一致性达45%左右，与鳞翅目昆虫TTV的亲缘关系更近。Bmttv主要在家蚕蛹期开始高量表达，在5龄幼虫中肠、精巢和翅原基中高量表达。BmTTV主要...     

脂多糖对家蚕幼虫Toll样受体基因BmToll9-2表达的影响

【目的】Toll样受体是昆虫Toll信号传导途径的一个重要组成成员,对激活昆虫机体对入侵病原微生物的先天免疫应答起着至关重要的作用。本研究旨在探究脂多糖对家蚕Bombyx mori幼虫中Toll样受体基因BmToll9-2基因表达的影响。【方法】利用RT-PCR分析BmToll9-2基因在家蚕大造品系4龄和5龄幼虫表皮、脂肪体、马氏管、中肠、神经、丝腺、胸部肌肉共7种组织中的表达特征;将脂多糖和大肠杆菌Escherichia coli注射到5龄幼虫体腔内,诱导其免疫系统响应,采用实时荧光定量PCR分析注射后不同时间BmToll9-2基因在中肠中的表达水平。【结果】RT-PCR结果表明,BmToll9-2基因在家蚕4龄幼虫的脂肪体、马氏管、神经和丝腺中高度表达,在5龄幼虫脂肪体、中肠、马氏管和神经中均有较高表达。实时荧光定量PCR结果显示,注射脂多糖能诱导5龄幼虫中肠中BmToll9-2基因转录,在注射后6 h时的诱导效果最好;注射大肠杆菌也能诱导BmToll9-2基因转录,在注射后3和6 h时的诱导效果最好。【结论】家蚕幼虫BmToll9-2基因在脂多糖和大肠杆菌处理后上调表达,提示BmToll9-2受体可能参与昆虫Toll样受体对脂多糖和细菌的识别过程。     

家蚕化学感受蛋白CSP16的表达及结合特性分析

【目的】化学感受蛋白(chemosensory proteins,CSPs)在昆虫化学信号的感受识别和生长发育调节等生理过程具有重要作用。本研究旨在探索CSP16在家蚕Bombyx mori中的功能。【方法】利用RT-q PCR分析csp16在家蚕不同发育时期和不同组织的表达特征,用原核表达系统对家蚕CSP16进行表达纯化,并通过荧光结合实验检测该蛋白与不同配体化合物的结合特性。【结果】RT-q PCR结果表明,csp16在家蚕1-5龄幼虫中呈规律性表达,各龄期眠蚕中表达量最高,5龄第3天幼虫中主要表达于头、表皮、精巢和卵巢等。蜕皮激素(20E)处理后csp16在不同龄期幼虫和5龄幼虫不同组织中的表达量上调。纯化后CSP16的荧光结合实验表明,CSP16与醇类、酯类、醛类、酚类和苯环类等化合物的亲和力都较弱。【结论】csp16在家蚕不同龄期幼虫眠蚕中表达量最高,蜕皮激素使csp16在家蚕取食幼虫中的表达量出现上调,提示其可能参与家蚕幼虫的蜕皮过程。     

基于双元转基因CRISPR/Cas9系统的家蚕pax3基因功能分析

【目的】本研究旨在以家蚕Bombyx mori为研究模型探索pax3基因在鳞翅目昆虫中的生物学功能。【方法】利用PCR扩增验证家蚕Bmpax3外显子序列;利用qRT-PCR检测Bmpax3在5龄第3天家蚕幼虫头、表皮、脂肪体、中肠、马氏管、前部丝腺、中部丝腺、后部丝腺和生殖腺(包括精巢和卵巢)中的表达谱;利用双元转基因CRISPR/Cas9系统构建Bmpax3敲除突变体,分析Bmpax3突变对家蚕幼虫存活、体节分化及性别差异的影响。【结果】Bmpax3在家蚕5龄第3天幼虫头、中肠和丝腺中均有表达,其中在前部丝腺表达量最高。Bmpax3突变体的卵孵化率约为90%,但约有80%的突变体在1龄幼虫期死亡,有将近10%的突变个体能幸存并发育到成虫阶段,并且存活成虫数存在性别差异,雄性显著多于雌性。在幸存的成虫中,约有将近1/2的个体腹部末端体节分节异常,表皮条纹混乱,腹节腹板部分缺失,生殖器官及其周围的其他辅助器官出现发育缺陷。【结论】Bmpax3发生突变后会对家蚕的生存及形态发育产生较大的影响,提示Bmpax3可能参与了家蚕的生长发育过程。     

家蚕miR-2769靶基因的鉴定及表达分析

【目的】MiRNAs在昆虫变态发育过程中发挥非常重要的作用。对家蚕Bombyx mori miRNAs及靶基因的研究将有助于阐明miRNAs参与调控家蚕变态发育的分子机制。【方法】往家蚕5龄第2天幼虫血淋巴注射蜕皮激素20E后,qRT-PCR检测miR-2769在家蚕脂肪体中的表达;通过生物信息学方法预测家蚕miR-2769的靶基因;利用双荧光酶报告载体系统分析miR-2769与预测靶基因BmE75B的互作;qRT-PCR检测miR-2769及其靶基因BmE75不同剪接体在家蚕不同发育时期(幼虫、蛹和成虫)和幼虫不同组织(头、表皮、丝腺、脂肪体、精巢、卵巢、马氏管、中肠和血淋巴)中的表达量。【结果】研究结果表明,miR-2769可通过与家蚕BmE75B的3′UTR区结合位点的互作,显著抑制荧光素酶报告基因的表达。qRT-PCR结果表明,miR-2769和BmE75A/BmE75B在20E诱导家蚕脂肪体中表达趋势相反。时空表达分析结果表明,miR-2769与BmE75的不同剪接体在家蚕不同发育时期和不同组织中均具有特异性表达特征。在家蚕变态发育的不同阶段,miR-2769和BmE75A的表达量均较低,而BmE75B在蛹期表达量较高,BmE75C在5龄末幼虫和蛹早期有极高表达水平。此外,miR-2769与BmE75不同剪接体均存在一定程度的表达负相关。在家蚕5龄幼虫血淋巴中miR-2769可促进BmE75A的表达,在脂肪体中miR-2769可促进BmE75B的表达,而在其他组织中miR-2769抑制BmE75不同剪接体的表达。【结论】家蚕miR-2769可通过与BmE75B的3′UTR区的互作对BmE75不同剪接体的表达进行负调控。     

LncRNA63及其共表达基因Hr3在家蚕中的表达和功能分析

【目的】本研究旨在通过对一个新的长链非编码RNA (long non-coding RNA, lncRNA)及其共表达基因在家蚕Bombyx mori中的表达和功能进行分析,进一步阐明lncRNA在调控家蚕变态发育中的分子机制。【方法】基于前期家蚕脂肪体转录组测序数据,我们发现在蜕皮激素20E(2 μg/μL)处理5龄幼虫早期的脂肪体中lncRNA63表达显著上调,家蚕激素受体基因Hr3与之共表达。利用qRT-PCR对lncRNA63和Hr3在家蚕不同发育时期(4-5龄幼虫、蛹和成虫)、5龄幼虫不同组织(头、体壁、血淋巴、中肠、马氏管、脂肪体、丝腺、精巢和卵巢)和2 μg/μL 20E处理2, 6, 12和24 h后5龄幼虫脂肪体中的表达谱进行分析;采用核质分离检测和原位杂交技术检测lncRNA63在家蚕BmN细胞中的定位;利用dsRNA干涉家蚕5龄幼虫个体中lncRNA63的表达,并利用qRT-PCR检测RNA干涉lncRNA63对头、丝腺、脂肪体和体壁中Hr3表达的影响。【结果】qRT-PCR结果表明,lncRNA63和Hr3在家蚕羽化前的蛹末期有一个表达高峰;二者在家蚕5龄幼虫头、体壁和丝腺中都有较高表达;lncRNA63和Hr3在2 μg/μL 20E处理2, 6和12 h的家蚕5龄幼虫脂肪体中较对照组(无水乙醇处理组)都显著上调,24 h下降到与对照组相当水平,二者的表达趋势完全一致。LncRNA63主要定位于BmN细胞核,但20E可诱导lncRNA63的核质迁移。利用dsRNA干涉lncRNA63表达后,Hr3的表达显著下调。【结论】20E不仅可调控lncRNA63的表达,还可诱导lncRNA63的核质迁移;lncRNA63可通过调控共表达基因Hr3的表达参与家蚕的变态发育过程。     

家蚕Sox家族基因BmDichaete的克隆与表达分析

【目的】Sox家族是一类转录调控因子,在多细胞动物的发育过程中起到了极其重要的作用。本研究旨在获得家蚕Bombyx mori Sox家族基因,并分析其在幼虫不同组织和发育阶段的表达模式及功能。【方法】采用cDNA末端快速扩增方法(rapid amplification of cDNA ends,RACE)克隆家蚕Sox家族基因,并对其序列进行生物信息学分析。构建原核表达载体,诱导原核表达并得到其蛋白的多克隆抗体,并以Western blot验证其蛋白在家蚕胚胎发育时期(产卵后24,48,72,96,120,144,168,192和216 h)和蚁蚕的表达特征。同时,使用半定量RT-PCR技术分析这一基因在家蚕整个发育过程以及5龄第3天幼虫不同组织(精巢、卵巢、神经节、头部、丝腺、脂肪体、马氏管、中肠、后肠、表皮、血液、气管)中的表达谱。【结果】克隆获得一个家蚕Sox家族基因,将其命名为BmDichaete(Gen Bank登录号:KY914554),其cDNA序列全长为1 541 bp,开放阅读框长741 bp,编码246个氨基酸,预测分子量大小为27.3 kD,等电点为9.89。同源序列比对和系统进化分析显示,BmDichaete具有Sox家族的典型HMG结构域,并与其他鳞翅目昆虫的Dichaete蛋白具有较高的同源性。对其表达模式分析发现,BmDichaete在家蚕整个发育时期都有表达,从胚胎发育后期到蛹前期持续高表达,在蛹后期及成虫期表达量有所下降,并且该基因在家蚕5龄第3天幼虫的卵巢、头部、丝腺及后肠组织中显著高表达。Western blot分析结果显示,BmDichaete在家蚕胚胎发育过程中持续而稳定地表达。【结论】家蚕BmDichaete具有典型HMG结构域,属于Sox家族成员。BmDichaete在家蚕胚胎发育的各个时期都发挥作用。本研究为进一步探索该基因在家蚕中的功能奠定了基础。     

家蚕吡哆醛激酶基因干扰降低转氨酶基因的转录表达

【目的】维生素B₆在氨基酸代谢中是多种酶的辅酶,维持氨基酸代谢的正常运行。磷酸吡哆醛（pyridoxal-5′-phosphate, PLP）是维生素B₆的主要辅酶形式,吡哆醛激酶（pyridoxal kinase, PLK）是PLP的重要生成酶,本研究试图明确PLK基因与PLP依赖酶之间转录水平的调节关系。【方法】本研究采用RNA干扰（RNA interference, RNAi）方法对家蚕 Bombyx mori 的PLK基因进行干扰,通过体外合成PLK基因的3个干扰片段（siRNA1, siRNA2和siRNA3）,将siRNA从体腔注入5龄第3天的家蚕幼虫体内诱导RNAi。利用荧光定量PCR测定不同干扰片段、不同时间点及不同组织中PLK基因表达量的变化;并测定家蚕体内磷酸丝氨酸转氨酶（phosphoserine aminotransferase, SerB）和天门冬氨酸氨基转移酶（asparate aminotransferase, AST）基因的表达量。【结果】注射干扰片段后48 h干扰效果达到最佳。3个干扰片段干扰效果从高到低依次为siRNA1, siRNA2和siRNA3。RNAi效果最好的是中肠组织,其PLK基因的相对表达量下降了55%。RNA干扰PLK基因后,后部丝腺中SerB和AST基因相对表达量分别下降了90%和29%。【结论】本研究通过RNAi实现了家蚕PLK基因干扰,并进一步证明了家蚕PLK基因和SerB基因及AST基因存在联动调节关系。     

Tazarotene-induced gene 1 interacts with Polo-like kinase 2 and inhibits cell proliferation in HCT116 colorectal cancer cells

Tazarotene-induced gene 1 (TIG1) is considered to be a tumor suppressor gene that is highly expressed in normal or well-differentiated colon tissues, while downregulation of TIG1 expression occurs in poorly differentiated colorectal cancer (CRC) tissues. However, it is still unclear how TIG1 regulates the tumorigenesis of CRC. Polo-like kinases (Plks) are believed to play an important role in regulating the cell cycle. The performance of PLK2 in CRC is negatively correlated with the differentiation status of CRC tissues. Here, we found that PLK2 can induce the growth of CRC cells and that TIG1 can prevent PLK2 from promoting the proliferation of CRC cells. We also found that the expression of PLK2 in CRC cells was associated with low levels of Fbxw7 protein and increased expression of cyclin E1. When TIG1 was coexpressed with PLK2, the changes in Fbxw7/cyclin E1 levels induced by PLK2 were reversed. In contrast, silencing TIG1 promoted the proliferation of CRC, and when PLK2 was also silenced, the proliferation of CRC cells induced by TIG1 silencing was significantly inhibited. The above research results suggest that TIG1 can regulate the tumorigenesis of CRC by regulating the activity of PLK2.     

Downregulation of polo-like kinase 4 in hepatocellular carcinoma associates with poor prognosis

Polo-like kinase 4 (PLK4), belonging to serine/threonine kinase family, is critical for centriole replication and cell cycle progression. PLK4 has been proposed as a tumor suppressor in hepatocellular carcinoma (HCC). However, its expression and significance in HCC have not been well studied. In the present study, we found that PLK4 was markedly downregulated in both HCC cell lines and fresh cancer tissues, using quantitative real-time-PCR and western blot. Immunohistochemistry data also revealed that decreased expression of PLK4 was present in 72.4% (178/246) of HCC tissues, compared with the corresponding adjacent nontumorous tissues. Furthermore, PLK4 expression significantly correlated with clinicopathological parameters, including clinical stage (P=0.034), serum α-fetoprotein (AFP) (P=0.019) and tumor size (P=0.032). Moreover, HCC patients with low PLK4 expression survived shorter than those with high PLK4 expression, as indicated by overall survival (P=0.002) and disease-free survival (P=0.012) assessed by the Kaplan-Meier method. In addition, multivariate analysis suggested PLK4 as an independent predictor of overall survival (HR, 0.556; 95%CI, 0.376-0.822; P=0.003) and disease-free survival (HR, 0.547; 95%CI, 0.382-0.783; P=0.001). Collectively, our study demonstrated that PLK4 was remarkably downregulated in HCC and could be served as a potential prognostic marker for patients with this deadly disease.     

Polo-like kinase and survivin are esophageal tumor-specific promoters

For developing successful cancer gene therapy strategies, tumor-specific gene delivery is essential. In this study, we used esophageal cancer (EC) cells to identify and evaluate esophageal tumor-specific gene promoters. Four genes (polo-like kinase-1/PLK, survivin/BIRC5, karyopherin alpha 2/KPNA2, and pituitary tumor transforming gene protein 1/PTTG1) were identified by a microarray analysis as highly expressed in EC cell lines vs. five normal organ tissues (liver, lung, kidney, brain, and heart). By quantitative RT-PCR, the average mRNA expression levels of these four genes in 20 primary ECs were 2.7-fold (PLK), 6.1-fold (survivin), 2.6-fold (KPNA2), and 2.4-fold (PTTG1) higher than that of each gene in 24 different normal organs. By dual luciferase assay, the promoter activity of PLK and survivin in EC cell lines was 18.9-fold and 28.5-fold higher, respectively, than in normal lung and renal cells. The promoters of PLK and survivin could be useful tools for developing EC-specific gene therapy vectors.     

家蚕磷酸吡哆醛激酶cDNA的克隆和酶活表征

吡哆醛激酶 (EC 2.7.1.35) 在 ATP 和 Zn2 的存在下,催化吡哆醛的磷酸化反应生成磷酸吡哆醛 (PLP)。在生物体内许多酶促反应中,PLP 是一种重要的辅酶因子。家蚕和哺乳动物一样,需依赖食物中的维生素 B6前体来合成 PLP。文章描述了利用家蚕基因组数据库序列信息及使用 PCR 方法,克隆出编码家蚕吡哆醛激酶的 cDNA (GenBank 登录号:DQ452397)。克隆到的 cDNA 含有一个 894 bp 的完整可读框,编码一条分子量为 33.1 kDa,含 298 个氨基酸残基的蛋白质。序列比对显示此蛋白质序列与人类吡哆醛激酶蛋白序列具有 48.6%的同一性,包含吡哆醛激酶家族共有的特征保守序列,但其氨基酸残基数比哺乳动物和植物克隆到的吡哆醛激酶残基数均少 10 多个残基。多序列比对结果显示,吡哆醛激酶中几个有关键功能且在哺乳动物和植物中均保守的氨基酸残基在此蛋白中被替换为其他种类氨基酸残基。采用 T7 启动子和 T7 聚合酶表达系统对克隆到的 cDNA 进行了原核表达并对表达粗提产物进行了酶活检测。实验结果显示表达得到的可溶性蛋白产物占其总蛋白量为 10%,细胞粗提物具有活力为 30 nmol/min/mg 的吡哆醛激酶活性,结果证实了克隆到的 cDNA 编码家蚕中的吡哆醛激酶。     

PLK1 Down-Regulates Parainfluenza Virus 5 Gene Expression

The paramyxoviruses are a family of negative-sense RNA viruses that includes many important human and animal pathogens. Paramyxovirus RNA synthesis requires the viral phosphoprotein (P) and the large (L) protein. Phosphorylation of P is thought to regulate viral gene expression, though direct proof remains elusive. Recently, we reported that phosphorylation of a specific residue (Ser157) of the P protein of parainfluenza virus 5 (PIV5), a prototypical paramyxovirus, correlates with decreased viral gene expression and cytokine expression in infected cells. Here, we show that: Polo-like kinase 1 (PLK1), a serine/theronine kinase that plays a critical role in regulating the cell cycle, interacts with PIV5 P through the S157 residue; PLK1 inhibition increases viral gene expression; PLK1 over-expression inhibits viral gene expression; and PLK1 directly phosphorylates P in vitro, indicating that PLK1 down-regulates viral gene expression by phosphorylating P. Furthermore, we have determined the PLK1 phosphorylation site on P and found that mutant recombinant PIV5 whose P proteins cannot either bind to or be phosphorylated by PLK1 have similar phenotypes. Increased viral gene expression in PIV5 with mutations in the PLK1 binding/phosphorylation sites correlates with increased induction of cell death and cytokine expression, suggesting that PIV5 limits its viral gene expression to avoid these host effects. It is possible that targeting PLK1 will enhance host innate immune responses, leading to a novel strategy of clearing paramyxovirus infections quickly.     

Inhibition of Polo-like kinase 4 induces mitotic defects and DNA damage in diffuse large B-cell lymphoma

Polo-like kinase 4 (PLK4), a key regulator of centriole biogenesis, has recently been shown to play key roles in tumorigenesis. Blocking PLK4 expression by interference or targeted drugs exhibits attractive potential in improving the efficacy of chemotherapy. Nevertheless, the role of PLK4 in diffuse large B-cell lymphoma (DLBCL) is still undefined. In this study, we discover that PLK4 is a potential target for the treatment of DLBCL, and demonstrate the efficacy of a PLK4 inhibitor when used in combination with doxorubicin. Pharmaceutical inhibition of PLK4 with CFI-400945 inhibited DLBCL cell proliferation and induced apoptotic cell death. The anti-tumor effects were accompanied by mitotic defects, including polyploidy and cytokinesis failure. Activation of p53 and Hippo/YAP tumor suppressor signaling pathway was identified as the potential mechanisms driving CFI-400945 activity. Moreover, CFI-400945 treatment resulted in activation of DNA damage response. Combining CFI-400945 with doxorubicin markedly delayed tumor progression in DLBCL xenografts. Finally, PLK4 was increased in primary DLBCL tissues and cell lines. High levels of PLK4 expression were associated with poor survival in the patients receiving CHOP-based treatment, implicating PLK4 as a predictive biomarker of DLBCL chemosensitivity. These results provide the therapeutic potential of CFI-400945 both as monotherapy or in combination with doxorubicin for the treatment of DLBCL.Subject terms: B-cell lymphoma, Cytokinesis, DNA damage response     

氯虫苯甲酰胺胁迫下小菜蛾ABCC1～ABCC5 mRNA的表达特征

【目的】为探讨小菜蛾Plutella xylostella ABC转运蛋白(ATP-binding cassette transporter)与氯虫苯甲酰胺代谢的关系【方法】采用实时荧光定量RT-PCR技术,测定了氯虫苯甲酰胺敏感和抗性小菜蛾及用LC50剂量的氯虫苯甲酰胺处理敏感种群不同时间后ABCC1~ABCC5 mRNA的表达量;并检测了其中过表达的ABCC3~ABCC5在小菜蛾不同发育阶段和4龄幼虫不同组织中的表达量。【结果】所检测的5个ABCC基因在氯虫苯甲酰胺抗性品系中均上调表达,最高为敏感品系的2倍;LC50的氯虫苯甲酰胺处理后ABCC3、ABCC4和ABCC5 mRNA的表达量分别上调2.16倍、2.81倍和1.85倍,ABCC1和ABCC2则分别下调为对照组的65.8%和37.2%。ABCC3的mRNA在幼虫期和雄性成虫中表达量显著高于其它时期;ABCC4的mRNA在各发育阶段表达量差异不大,其中在预蛹期最高;ABCC5的mRNA在3龄幼虫中表达量显著高于其它龄期。在4龄幼虫各组织中,ABCC3、ABCC4和ABCC5在中肠中的表达量均显著高于其它组织。【结论】小菜蛾ABCC3、ABCC4和ABCC5可能在其对氯虫苯甲酰胺的代谢中起作用,该研究结果为进一步探究小菜蛾对氯虫苯甲酰胺的抗性与ABCC1~ABCC5的关系奠定了基础。