The western flower thrips(WFT;Frankliniella occidentalis)is a mesophyll cell feeder that damages many crops.Management of WFT is complex due to factors such as high fecundity,short reproduction time,ability to feed on...The western flower thrips(WFT;Frankliniella occidentalis)is a mesophyll cell feeder that damages many crops.Management of WFT is complex due to factors such as high fecundity,short reproduction time,ability to feed on a broad range of host plants,and broad pesticide resistance.These challenges have driven research into developing alternative pest control approaches for WFT.This study analyzed the feasibility of a biological control-based strategy to manage WFT using RNA interference(RNAi)-mediated silencing of WFT endogenous genes.For the delivery of RNAi,we developed transgenic tomato lines expressing double-stranded RNA(dsRNA)of coatomer protein subunit epsilon(CopE)and Toll-like receptor 6(TLR6)from WFT.These genes are involved in critical biological processes of WFT,and their dsRNA can be lethal to these insects when ingested orally.Adult WFT that fed on the transgenic dsRNAexpressing tomato flower stalk showed increased mortality compared with insects that fed on wild-type samples.In addition,WFT that fed on TLR6 and CopE transgenic tomato RNAi lines showed reduced levels of endogenous CopE and TLR6 transcripts,suggesting that their mortality was likely due to RNAi-mediated silencing of these genes.Thus,our findings demonstrate that transgenic tomato plants expressing dsRNA of TLR6 and CopE can be lethal to F.occidentalis,suggesting that these genes may be deployed to control insecticide-resistant WFT.展开更多
目的:观察白介素-6(IL-6)对N-甲基-D-天门冬氨酸(NMDA)损伤小脑颗粒神经元NMDA受体亚单位1(NR1)和三磷酸肌醇受体1(IP3R1)蛋白表达的影响。方法:取出生后8 d SD大鼠小脑进行小脑颗粒神经元(CGNs)体外培养。在培养液中加入IL-6(40或120 n...目的:观察白介素-6(IL-6)对N-甲基-D-天门冬氨酸(NMDA)损伤小脑颗粒神经元NMDA受体亚单位1(NR1)和三磷酸肌醇受体1(IP3R1)蛋白表达的影响。方法:取出生后8 d SD大鼠小脑进行小脑颗粒神经元(CGNs)体外培养。在培养液中加入IL-6(40或120 ng/mL),培养8 d后,用NMDA(100μmol/L)损伤神经元30 min,建立神经元损伤模型。Western Blot法检测NR1和IP3R1蛋白的表达。结果:IL-6下调NR1的蛋白表达,并抑制NMDA诱导的IP3R1的蛋白表达增高。结论:IL-6通过抑制NMDA受体和IP3受体实现神经保护作用。展开更多
内质网膜蛋白复合物亚单位6(endoplasmic reticulum membrane protein complex subunit 6,EMC6),也称穿膜蛋白93(transmembrane protein 93,TMEM93)是我们首次报道的一个人类自噬相关分子。EMC6基因进化保守,表达广泛,在胃癌组织中表达...内质网膜蛋白复合物亚单位6(endoplasmic reticulum membrane protein complex subunit 6,EMC6),也称穿膜蛋白93(transmembrane protein 93,TMEM93)是我们首次报道的一个人类自噬相关分子。EMC6基因进化保守,表达广泛,在胃癌组织中表达下调或缺失。本研究利用构建的重组腺病毒5型EMC6(Ad5-EMC6)载体,感染胃癌细胞系BGC823和SGC7901,分析了其在肿瘤细胞的表达以及抗肿瘤活性。研究证明,Ad5-EMC6能够显著抑制胃癌细胞的克隆形成、细胞划痕修复、以及迁移和侵袭的能力。进一步的研究提示,Ad5-EMC6能够降低胃癌细胞局部黏着斑激酶(FAK)的Y576/577磷酸化水平,FAK下游的基质金属蛋白酶MMP2和MMP9的蛋白质水平也同时下调。在裸鼠的腹膜扩散模型中,Ad5-EMC6处理组的小鼠腹膜结节数量明显减少或缺失。这些研究数据提示,Ad5-EMC6介导的FAK信号灭活可能是其抑瘤活性的机制之一,其分子机制还需要进一步探讨。展开更多
基金supported by the Basic Science Research Program through the National Research Foundation(NRF),Ministry of Education,Korea(2021R1I1A1A01041938)a grant from the New Breeding Technologies Development Program,Rural Development Administration,Korea(PJ0165432022)supported in part by the BK21 Plus Program,Ministry of Education,Korea。
文摘The western flower thrips(WFT;Frankliniella occidentalis)is a mesophyll cell feeder that damages many crops.Management of WFT is complex due to factors such as high fecundity,short reproduction time,ability to feed on a broad range of host plants,and broad pesticide resistance.These challenges have driven research into developing alternative pest control approaches for WFT.This study analyzed the feasibility of a biological control-based strategy to manage WFT using RNA interference(RNAi)-mediated silencing of WFT endogenous genes.For the delivery of RNAi,we developed transgenic tomato lines expressing double-stranded RNA(dsRNA)of coatomer protein subunit epsilon(CopE)and Toll-like receptor 6(TLR6)from WFT.These genes are involved in critical biological processes of WFT,and their dsRNA can be lethal to these insects when ingested orally.Adult WFT that fed on the transgenic dsRNAexpressing tomato flower stalk showed increased mortality compared with insects that fed on wild-type samples.In addition,WFT that fed on TLR6 and CopE transgenic tomato RNAi lines showed reduced levels of endogenous CopE and TLR6 transcripts,suggesting that their mortality was likely due to RNAi-mediated silencing of these genes.Thus,our findings demonstrate that transgenic tomato plants expressing dsRNA of TLR6 and CopE can be lethal to F.occidentalis,suggesting that these genes may be deployed to control insecticide-resistant WFT.
文摘内质网膜蛋白复合物亚单位6(endoplasmic reticulum membrane protein complex subunit 6,EMC6),也称穿膜蛋白93(transmembrane protein 93,TMEM93)是我们首次报道的一个人类自噬相关分子。EMC6基因进化保守,表达广泛,在胃癌组织中表达下调或缺失。本研究利用构建的重组腺病毒5型EMC6(Ad5-EMC6)载体,感染胃癌细胞系BGC823和SGC7901,分析了其在肿瘤细胞的表达以及抗肿瘤活性。研究证明,Ad5-EMC6能够显著抑制胃癌细胞的克隆形成、细胞划痕修复、以及迁移和侵袭的能力。进一步的研究提示,Ad5-EMC6能够降低胃癌细胞局部黏着斑激酶(FAK)的Y576/577磷酸化水平,FAK下游的基质金属蛋白酶MMP2和MMP9的蛋白质水平也同时下调。在裸鼠的腹膜扩散模型中,Ad5-EMC6处理组的小鼠腹膜结节数量明显减少或缺失。这些研究数据提示,Ad5-EMC6介导的FAK信号灭活可能是其抑瘤活性的机制之一,其分子机制还需要进一步探讨。
