产品介绍
EntransterTM-H 是其研发的纳米聚合物转染试剂,针对 HEK293 全系优化,细胞毒性可控,覆盖从微孔板到数十升悬浮放大全场景。
本品适合在 HEK293 全系(HEK293、HEK293T、HEK293T-suspension、HEK293F、HEK293-6E、Expi293 等)细胞中进行贴壁转染、大规模悬浮转染、病毒包装(慢病毒、AAV、腺病毒)与重组蛋白生产。既支持贴壁培养也支持悬浮培养。
订购金额满1000元,免运费。
EntransterTM-H 是其研发的纳米聚合物转染试剂,针对 HEK293 全系优化,细胞毒性可控,覆盖从微孔板到数十升悬浮放大全场景。
本品适合在 HEK293 全系(HEK293、HEK293T、HEK293T-suspension、HEK293F、HEK293-6E、Expi293 等)细胞中进行贴壁转染、大规模悬浮转染、病毒包装(慢病毒、AAV、腺病毒)与重组蛋白生产。既支持贴壁培养也支持悬浮培养。
本品适合在 HEK293 全系(HEK293、HEK293T、HEK293T-suspension、HEK293F、HEK293-6E、Expi293 等)细胞中进行贴壁转染、大规模悬浮转染、病毒包装(慢病毒、AAV、腺病毒)与重组蛋白生产。既支持贴壁培养也支持悬浮培养。
可用于大规模正向转染,也可用于高通量筛选的反向转染
可用于病毒包装,也可以用于重组蛋白转染
既支持贴壁培养也支持悬浮培养。
Nat Commun. 2026 Apr 20.doi: 10.1038/s41467-026-72181-6. Photoactivatable CRISPR/Cas13d via upconversion nanoparticles for deep tissue RNA engineering and orthopedic therapy 通过上转换纳米颗粒实现光激活CRISPR/Cas13d,用于深层组织RNA工程和骨科治疗(IF:15.7).
Viruses. 2026 Mar 5;18(3):323.doi: 10.3390/v18030323. Tree Shrew Genome-Wide CRISPR Screen Identifies RNF6 as a Proviral Host Factor for Zika Virus Replication in Brain Microvascular Endothelial Cells 树鼩全基因组CRISPR筛选鉴定出RNF6是寨卡病毒在脑微血管内皮细胞中复制的病毒前体宿主因子
Cell Rep Methods. 2026 Feb 23;6(2):101299.doi: 10.1016/j.crmeth.2025.101299. Epub 2026 Feb 11. An orthogonal CRISPR/Cpf1 platform for precise spatiotemporal gene regulation and osteoporotic fracture repair 用于精确时空基因调控和骨质疏松性骨折修复的正交CRISPR/Cpf1平台 (IF:4.500).
Biochem Pharmacol. 2025 Dec;242(Pt 4):117403.doi: 10.1016/j.bcp.2025.117403. Epub 2025 Oct 3. Plectin promotes bone formation via phase separation and sequestering annexin A2 Plec通过相分离和螯合Anxa2来促进骨形成 (IF:5.3).
Aging Cell. 2025 Dec 9:e70306.doi: 10.1111/acel.70306. FoxO1 Responses to Chronic Oxidative Stress to Participate in Age-Related Osteoporosis by Depriving β-Catenin From TCF7 。FoxO1对慢性氧化应激的反应通过从TCF7中剥夺β-Catenin参与年龄相关性骨质疏松症 (IF:8.104).
Biochem Pharmacol. 2025 Oct 3;242(Pt 4):117403.doi: 10.1016/j.bcp.2025.117403 Plectin promotes bone formation via phase separation and sequestering annexin A2 Plec通过相分离和螯合Anxa2促进骨形成(IF:5.6).
Gene. 2025 Sep 15:965:149650.doi: 10.1016/j.gene.2025.149650. Epub 2025 Jun 30. Contribution of cysteamine dioxygenase to taurine biosynthesis in the oyster Crassostrea gigas半胱胺双加氧酶对牡蛎牛磺酸生物合成的贡献
Trends Biotechnol. 2025 Aug 30:S0167-7799(25)00314-2.doi: 10.1016/j.tibtech.2025.07.029. Highly efficient prime editors for mammalian genome editing based on porcine retrovirus reverse transcriptase 基于猪逆转录病毒逆转录酶的高效哺乳动物基因组编辑引物 (IF:14.900).
Comp Biochem Physiol B Biochem Mol Biol. 2025 Aug-Sep:279:111128.doi: 10.1016/j.cbpb.2025.111128. Epub 2025 Jul 10.
Metallothionein CgMTIII is involved in zinc binding and accumulation in the Pacific oyster Crassostrea gigas 金属硫蛋白CgMTIII参与太平洋牡蛎Crassostrea gigas中锌的结合和积累
Adv Sci (Weinh). 2025 Jul 14:e06492.doi: 10.1002/advs.202506492. Genomic Insights into the Origin, High Fecundity and Environmental Adaptation of Hu Sheep 湖羊起源、高繁殖力和环境适应性的基因组学研究 (IF:15.1).
Sci Rep. 2025 Jul 1;15(1):20687.doi: 10.1038/s41598-025-05826-z. LncRNA CTD-2555A7.2 promotes bone formation with LncRNA-specific cascade amplification strategy LncRNA CTD-2555A7.2通过LncRNA特异性级联扩增策略促进骨形成
J Ethnopharmacol. 2025 Jun 12:349:119935.doi: 10.1016/j.jep.2025.119935. Epub 2025 May 7. Mechanism of Rabdosia rubescens extract against gastric cancer microenvironment by SIRT1/NF-κB/p53 pathway and promoting tumor-associated macrophage polarization 冬凌草提取物通过SIRT1/NF-κB/p53途径抑制癌症微环境及促进肿瘤相关巨噬细胞极化的机制
J Invertebr Pathol. 2025 Jun:210:108289.doi: 10.1016/j.jip.2025.108289. Epub 2025 Feb 21. Characterization and functional analysis of the small heat shock protein HSP19.5 in Bombyx mori in response to Nosema bombycis infection 小分子热休克蛋白HSP19的特性和功能分析。家蚕对家蚕微孢子虫感染的反应
Commun Biol . 2025 May 29;8(1):827.doi: 10.1038/s42003-025-08290-7. A new type of Caspase-1 upon recognizing bacteria inhibits GSDME-dependent histone modification and NF-κB signaling 一种新型的Caspase-1在识别细菌时抑制GSDME依赖的组蛋白修饰和NF-κB信号传导 (IF:5.2).
Insects. 2025 May 21;16(5):544.doi: 10.3390/insects16050544. 20-Hydroxyecdysone Modulates Bmp53-Mediated Apoptosis Regulation by Suppressing Mdm2-like-Dependent Ubiquitination in Silkworm, Bombyx mori
Biotechnol Lett. 2025 Apr 16;47(3):42.doi: 10.1007/s10529-025-03576-6. Construction and immunogenicity analysis of a recombinant baculovirus targeting the N protein of SARS-CoV-2 靶向SARS-CoV-2 N蛋白的重组杆状病毒的构建及免疫原性分析
Phytomedicine. 2025 Apr:139:156442.doi: 10.1016/j.phymed.2025.156442. Epub 2025 Feb 1. Naturally-occurring carnosic acid as a promising therapeutic agent for skin inflammation via targeting STAT1 天然鼠尾草酸作为靶向STAT1治疗皮肤炎症的有前景的药物 (IF:6.7).
PLoS Biol. 2025 Apr 1;23(4):e3003047.doi: 10.1371/journal.pbio.3003047. eCollection 2025 Apr. Mdga2 deficiency leads to an aberrant activation of BDNF/TrkB signaling that underlies autism-relevant synaptic and behavioral changes in mice Mdga2缺乏导致BDNF/TrkB信号的异常激活,这是小鼠自闭症相关突触和行为变化的基础(IF:9.8).
Bull Entomol Res. 2025 Mar 24:1-14.doi: 10.1017/S000748532500015X. BmWARS inhibits BmNPV infection via the PI3K-Akt pathway BmWARS通过PI3K-Akt途径抑制BmNPV感染
J Invertebr Pathol. 2025 Feb 21:210:108289.doi: 10.1016/j.jip.2025.108289. Characterization and functional analysis of the small heat shock protein HSP19.5 in Bombyx mori in response to Nosema bombycis infection 小分子热休克蛋白HSP19.5的特性和功能分析对家蚕微孢子虫感染的反应
Cancer Cell Int. 2025 Jan 13;25(1):10.doi: 10.1186/s12935-025-03638-9.Heterogeneous nuclear ribonucleoprotein C promotes non-small cell lung cancer progression by enhancing XB130 mRNA stability and translation (IF:5.3).异质性核核糖核蛋白C通过增强XB130mRNA的稳定性和翻译促进非小细胞肺癌的进展
J Virol. 2024 Nov 27:e0151124.doi: 10.1128/jvi.01511-24. Unraveling dual fusion mechanisms in BmNPV GP64: critical roles of CARC motifs and signal peptide retention 解开BmNPV GP64中的双重融合机制:CARC基序和信号肽保留的关键作用
Mar Biotechnol (NY). 2024 Nov 27;27(1):11.doi: 10.1007/s10126-024-10379-9. A Zinc Uptake Transporter ZIP1-II Is Involved in Zinc Accumulation in the Hepatopancreas of Pacific Oyster Crassostrea gigas 锌摄取转运蛋白ZIP1-II参与太平洋牡蛎肝胰腺中锌的积累
Microb Cell Fact. 2024 Oct 18;23(1):284.doi: 10.1186/s12934-024-02534-7. The signal peptide of BmNPV GP64 activates the ERAD pathway to regulate heterogeneous secretory protein expression BmNPV GP64信号肽激活ERAD通路调节异质性分泌蛋白表达
Virology. 2024 Sep:597:110147.doi: 10.1016/j.virol.2024.110147. Epub 2024 Jun 19. Unveiling non-classical glycosylation patterns in Bombyx mori nucleopolyhedrovirus GP64: Insights into viral entry and fusion 揭示家蚕核型多角体病毒GP64的非经典糖基化模式:对病毒进入和融合的见解
Front Pharmacol. 2024 Sep 6:15:1439497.doi: 10.3389/fphar.2024.1439497. eCollection 2024. The lncRNA CADM2-AS1 promotes gastric cancer metastasis by binding with miR-5047 and activating NOTCH4 translation lncRNA CADM2-AS1通过与miR-5047结合并激活NOTCH4翻译来促进癌症转移 (IF:5.6).
Biol Res. 2024 Sep 9;57(1):64.doi: 10.1186/s40659-024-00544-8. Mouse testicular macrophages can independently produce testosterone and are regulated by Cebpb 小鼠睾丸巨噬细胞可以独立产生睾酮,并受Cebpb的调节
J Virol Methods. 2024 Jun:327:114933.doi: 10.1016/j.jviromet.2024.114933. Epub 2024 Apr 4. Intracellular localized heterogeneous protein franking by a transmembrane domain of GP64 is sufficient to be assembled on budded virions of Bombyx mori nucleopolyhedrovirus GP64跨膜结构域在细胞内定位的异质蛋白franking足以在家蚕核型多角体病毒的芽状病毒颗粒上组装
Int J Biol Macromol. 2024 May;266(Pt 1):131197.doi: 10.1016/j.ijbiomac.2024.131197. Epub 2024 Mar 28. Bombyx mori triose-phosphate transporter protein inhibits Bombyx mori nucleopolyhedrovirus infection by reducing the cell glycolysis pathway 家蚕三糖磷酸转运蛋白通过减少细胞糖酵解途径抑制家蚕核型多角体病毒感染
Invest Ophthalmol Vis Sci. 2024 Apr 1;65(4):1.doi: 10.1167/iovs.65.4.1. Identification of Novel FZD4 Mutations in Familial Exudative Vitreoretinopathy and Investigating the Pathogenic Mechanisms of FZD4 Mutations 家族性渗出性玻璃体视网膜病中新型FZD4突变的鉴定及FZD4突变致病机制的研究
Int Immunopharmacol. 2024 Apr 20:131:111864.doi: 10.1016/j.intimp.2024.111864. Epub 2024 Mar 13. miR-186-5p improves alveolar epithelial barrier function by targeting the wnt5a/β-catenin signaling pathway in sepsis-acute lung injury miR-186-5p通过靶向wnt5a/β-catenin信号通路改善脓毒症急性肺损伤肺泡上皮屏障功能
J Exp Clin Cancer Res. 2024 Apr 23;43(1):123.doi: 10.1186/s13046-024-03048-1. Tumor-suppressive miR-4732-3p is sorted into fucosylated exosome by hnRNPK to avoid the inhibition of lung cancer progression (IF:12.658).肿瘤抑制性miR-4732-3p通过hnRNPK分类为岩藻糖基外泌体,以避免对肺癌癌症进展的抑制
Mol Genet Genomics. 2024 Mar 13;299(1):32.doi: 10.1007/s00438-024-02128-3. Characterization of a novel heterozygous frameshift variant in NDP gene that causes familial exudative vitreoretinopathy in female patients 导致女性家族性渗出性玻璃体视网膜病变的NDP基因新型杂合移码变异的特征
Invest Ophthalmol Vis Sci. 2024 Mar 5;65(3):31.doi: 10.1167/iovs.65.3.31. Investigating the Impact of Dimer Interface Mutations on Norrin’s Secretion and Norrin/β-Catenin Pathway Activation 二聚体界面突变对Norrin分泌和Norrin/β-Catenin通路激活的影响
Dev Comp Immunol. 2024 Mar:152:105114.doi: 10.1016/j.dci.2023.105114. Epub 2023 Dec 13. Ras3 in Bombyx mori with antiviral function against B. mori nucleopolyhedrovirus 家蚕Ras3对家蚕核型多角体病毒具有抗病毒作用
FASEB J. 2024 Feb 29;38(4):e23493.doi: 10.1096/fj.202302387R. Deciphering a crucial dimeric interface governing Norrin dimerization and the pathogenesis of familial exudative vitreoretinopathy 解读Norrin二聚化的关键二聚体界面和家族性渗出性玻璃体视网膜病变的发病机制
Int J Biol Macromol. 2024 Feb;258(Pt 1):128570.doi: 10.1016/j.ijbiomac.2023.128570. Epub 2023 Dec 12. Frameshift variants in the C-terminal of CTNNB1 cause familial exudative vitreoretinopathy by AXIN1-mediated ubiquitin-proteasome degradation condensation (IF:8.2. CTNNB1 C末端的移码变异通过AXIN1介导的泛素-蛋白酶体降解缩合引起家族性渗出性玻璃体视网膜病变
Cell Commun Signal. 2024 Feb 1;22(1):93.doi: 10.1186/s12964-024-01497-x. Mechanosensitive channel of large conductance enhances the mechanical stretching-induced upregulation of glycolysis and oxidative metabolism in Schwann cells (IF:7.525). 大电导的机械敏感通道增强了机械拉伸诱导的雪旺氏细胞糖酵解和氧化代谢的上调
Small Methods. 2024 Jan 2:e2301310.doi: 10.1002/smtd.202301310. Online ahead of print. An Inducible CRISPR-dCas9-Based Transcriptional Repression System for Cancer Therapy 一种用于癌症治疗的基于诱导CRISPR-dCas9的转录抑制系统(IF:25.367).
Cell Death Dis. 2023 Nov 3;14(11):716.doi: 10.1038/s41419-023-06238-5. Inhibition of LSD1 induces ferroptosis through the ATF4-xCT pathway and shows enhanced anti-tumor effects with ferroptosis inducers in NSCLC CTNNB1新截短变异体引起家族性渗出性玻璃体视网膜病变
Mol Neurobiol. 2023 Nov 22.doi: 10.1007/s12035-023-03808-8. Mol Neurobiol . 2023 Nov 22. doi: 10.1007/s12035-023-03808-8. Online ahead of print. GSK-126 Attenuates Cell Apoptosis in Ischemic Brain Injury by Modulating the EZH2-H3K27me3-Bcl2l1 Axis GSK-126通过调节EZH2-H3K27me3-Bcl2l1轴减轻缺血性脑损伤中的细胞凋亡
Int J Biol Macromol. 2023 Sep 7:126801.doi: 10.1016/j.ijbiomac.2023.126801. Online ahead of print. Neddylation-dependent Neddylation-dependent LSD1 destabilization inhibits the stemness and chemoresistance of gastric cancer LSD1失稳抑制癌症的干燥和化疗耐药性
Gene. 2023 Sep 25:881:147626.doi: 10.1016/j.gene.2023.147626. Epub 2023 Jul 8. BmINR and BmAC6 genes involve in diapause regulation via the insulin/IGF signaling pathway in the silkworm (Bombyx mori) 家蚕BmINR和BmAC6基因通过胰岛素/IGF信号通路参与滞育调控
Sci Adv. 2023 Jul 21;9(29):eadf7858.doi: 10.1126/sciadv.adf7858. Epub 2023 Jul 21. Engineered exosomes reprogram Gli1+ cells in vivo to prevent calcification of vascular grafts and autologous pathological vessels 工程外泌体在体内重新编程Gli1+细胞,以防止血管移植物和自体病理血管钙化 (IF:14.98).
Mol Biol Rep. 2023 Jun;50(6):5295-5306.doi: 10.1007/s11033-023-08489-z. Epub 2023 May 6. m6A-dependent mevalonate kinase in juvenile hormone synthesis pathway regulates the diapause process of bivoltine silkworm (Bombyx mori) m6A依赖性甲羟戊酸激酶在幼激素合成途径中调节二伏蚕滞育过程
Food Sci Biotechnol. 2023 Jun 19;33(2):465-474.doi: 10.1007/s10068-023-01358-2. eCollection 2024 Jan. A novel protein extracted from Hemerocallis citrina Borani inhibits hepatocellular carcinoma cell proliferation by regulating mitochondria-dependent apoptosis and aerobic glycolysis 从萱草中提取的一种新蛋白通过调节线粒体依赖性细胞凋亡和抑制肝癌细胞增殖
Insects. 2023 Apr 5;14(4):362.doi: 10.3390/insects14040362. Determination of Key Components in the Bombyx mori p53 Apoptosis Regulation Network Using Y2H-Seq Y2H-Seq法测定家蚕p53细胞凋亡调控网络的关键成分
Oncol Lett. 2023 Feb 28;25(4):143.doi: 10.3892/ol.2023.13729. eCollection 2023 Apr. Effects of Helicobacter pylori on the expression of the FTO gene and its biological role in gastric cancer 幽门螺杆菌对FTO基因表达的影响及其在癌症中的生物学作用
J Med Genet. 2023 Feb;60(2):174-182.doi: 10.1136/jmedgenet-2021-108259. Epub 2022 Mar 31. Novel truncating variants in CTNNB1 cause familial exudative vitreoretinopathy CTNNB1新截短变异体引起家族性渗出性玻璃体视网膜病变
Biochem Biophys Res Commun. 2023 Jan 8:639:36-45.doi: 10.1016/j.bbrc.2022.11.067. Epub 2022 Nov 24. Silencing long non-coding RNA SNHG3 repairs the dysfunction of pulmonary microvascular endothelial barrier by regulating miR-186-5p/Wnt axis 沉默长非编码RNA SNHG3通过调节miR-186-5p/Wnt轴修复肺微血管内皮屏障功能障碍
Arch Pharm Res. 2023 Jan;46(1):44-58.doi: 10.1007/s12272-023-01426-5. Epub 2023 Jan 6. MEKs/ERKs-mediated FBXO1/E2Fs interaction interference modulates G1/S cell cycle transition and cancer cell proliferation MEKs/ERKs介导的FBXO1/E2Fs相互作用干扰调节G1/S细胞周期转变和癌症细胞增殖
Front Surg. 2023 Jan 6:9:1062659.doi: 10.3389/fsurg.2022.1062659. eCollection 2022. Classification of the mitochondrial ribosomal protein-associated molecular subtypes and identified a serological diagnostic biomarker in hepatocellular carcinoma 肝细胞癌线粒体核糖体蛋白相关分子亚型的分类及血清学诊断标志物的鉴定
Adipocyte. 2022 Dec;11(1):477-486.doi: 10.1080/21623945.2022.2107786. (IF3.553) MAPKs/AP-1, not NF-κB, is responsible for MCP-1 production in TNF-α-activated adipocytes 激活的脂肪细胞中MCP-1的产生
Int Immunopharmacol. 2022 Dec;113(Pt A):109312.doi: 10.1016/j.intimp.2022.109312. Epub 2022 Oct 14. Resibufogenin, one of bufadienolides in toad venom, suppresses LPS-induced inflammation via inhibiting NF-κB and AP-1 pathways CDK1通过抑制∆Np63α介导的转录调控促进头颈部鳞状细胞癌细胞的上皮-间充质过渡和迁移
Protein Expr Purif. 2022 Dec:200:106156.doi: 10.1016/j.pep.2022.106156. Epub 2022 Aug 18. The cytoplasmic tail substitution increases the assembly efficiency of Ebola virus glycoprotein on the budded virus of Bombyx mori nucleopolyhedrovirus 细胞质尾部置换提高了埃博拉病毒糖蛋白在家蚕核型多角体病毒芽状病毒上的组装效率
Front Mol Neurosci. 2022 Dec 8:15:1034766.doi: 10.3389/fnmol.2022.1034766. eCollection 2022. Nucleosome assembly protein 1-like 5 alleviates Alzheimer’s disease-like pathological characteristics in a cell model 核小体组装蛋白1-like 5在细胞模型中缓解阿尔茨海默病样病理特征
Microbiol Spectr. 2022 Aug 31;10(4):e0191322.doi: 10.1128/spectrum.01913-22. Epub 2022 Aug 8. (IF9.043) The Bombyx mori Nucleopolyhedrovirus GP64 Retains the Transmembrane Helix of Signal Peptide to Contribute to Secretion across the Cytomembrane 家蚕核多角体病毒GP64保留信号肽的跨膜螺旋以促进跨细胞膜分泌
Fish Shellfish Immunol. 2022 Aug:127:129-139.doi: 10.1016/j.fsi.2022.05.057. Epub 2022 Jun 14. A RAC-alpha serine/threonine-protein kinase (CgAKT1) involved in the synthesis of CgIFNLP in oyster Crassostrea gigas RACα-丝氨酸/苏氨酸蛋白激酶(CgAKT1)参与牡蛎CgIFNLP的合成
Research (Wash D C) . 2022 Jul 19;2022:9826426. doi: 10.34133/2022/9826426. eCollection 2022. Programming of Regulatory T Cells In Situ for Nerve Regeneration and Long-Term Patency of Vascular Grafts. (IF:11.036).
Int J Mol Sci. 2022 Jul 2;23(13):7385.doi: 10.3390/ijms23137385. (IF6.208) CDK1 Promotes Epithelial-Mesenchymal Transition and Migration of Head and Neck Squamous Carcinoma Cells by Repressing ∆Np63α-Mediated Transcriptional Regulation CDK1通过抑制∆Np63α介导的转录调节促进头颈部鳞状细胞的上皮-间充质转移和迁移
J Med Genet. 2022 Mar 31;jmedgenet-2021-108259. doi: 10.1136/jmedgenet-2021-108259. Online ahead of print. Novel truncating variants in CTNNB1 cause familial exudative vitreoretinopathy (IF:6.318).
STAR Protoc. 2022 Mar 15;3(2):101239.doi: 10.1016/j.xpro.2022.101239. eCollection 2022 Jun 17. Measuring Laplace pressure and imaging the actin cortex during cytokinesis in cultured cells 培养细胞胞质分裂过程中拉普拉斯压力的测量和肌动蛋白皮层的成像
Food Funct. 2022 Mar 7;13(5):2913-2924. doi: 10.1039/d1fo02755g. and bone formation via activating the Wnt/β-catenin signaling pathway (IF:5.396).
Ticks Tick Borne Dis. 2022 Jan 17;13(3):101906.Differential characteristics of mammalian and tick-derived promoters to trigger protein expression in transfected tick cell lines.
Dev Comp Immunol. 2022 Jun;131:104382. doi: 10.1016/j.dci.2022.104382. Epub 2022 Mar 1. A cypovirus encoded microRNA negatively regulates the NF-κB pathway to enhance viral multiplication in Silkworm, Bombyx mori
Exp Mol Med.2022 Jan;54(1):35-46.doi: 10.1038/s12276-021-00721-9.Epub 2022 Jan 12. FBXW7-mediated ERK3 degradation regulates the proliferation of lung cancer cells.
Nutr Cancer. 2022;74(1):333-345.doi: 10.1080/01635581.2021.1882508. Epub 2021 Feb 5. TKP, a Serine Protease from Trichosanthes kirilowii, Inhibits Cell Proliferation by Blocking Aerobic Glycolysis in Hepatocellular Carcinoma Cells 天花粉丝氨酸蛋白酶TKP通过阻断肝细胞癌细胞的有氧糖酵解抑制细胞增殖
iScience. 2022 Feb 21;25(3):103949. doi: 10.1016/j.isci.2022.103949. eCollection 2022 Mar 18. Long noncoding RNA Lnc-DIF inhibits bone formation by sequestering miR-489-3p (IF:6.007).
Eur J Ophthalmol. 2022 Jan 17;11206721221074209. doi: 10.1177/11206721221074209. Online ahead of print. Whole-Exome Sequencing Reveals Novel NDP Variants in X-Linked Familial Exudative Vitreoretinopathy
J Anim Sci Biotechnol. 2021 Dec 13;12(1):120. doi: 10.1186/s40104-021-00639-2. Transcriptome sequencing analysis for the identification of stable lncRNAs associated with bovine Staphylococcus aureus mastitis (IF:5.032).
Arch Pharm Res. 2021 Dec;44(12):1091-1108.doi: 10.1007/s12272-021-01358-y. Epub 2021 Nov 9. Kaempferol sensitizes cell proliferation inhibition in oxaliplatin-resistant colon cancer cells 山奈酚对奥沙利铂耐药结肠癌癌症细胞增殖抑制的敏感性
Insect Mol Biol. 2021 Dec;30(6):552-565.doi: 10.1111/imb.12725. Epub 2021 Jul 30. Functional analysis of a putative Bombyx mori cypovirus miRNA BmCPV-miR-10 and its effect on virus replication 家蚕cypovirus miRNA BmCPV-miR-10的功能分析及其对病毒复制的影响
Biomed Pharmacother. 2021 Oct;142:112056.doi:10.1016/j.biopha.2021.112056. Epub 2021 Aug 23. Dysregulation of miR-342-3p in plasma exosomes derived from convalescent AMI patients and its consequences on cardiac repair恢复期AMI患者血浆外小体中miR-342-3p的失调及其对心脏修复的影响
Fish Shellfish Immunol. 2021 Dec;119:173-181. doi: 10.1016/j.fsi.2021.09.016. Epub 2021 Oct 2. Identification and characterization of an apoptosis-inducing factor 1 involved in apoptosis and immune defense of oyster, Crassostrea gigas
Photodermatol Photoimmunol Photomed. 2021 Sep;37(5):395-403.doi: 10.1111/phpp.12670. Epub 2021 Feb 23. Ultraviolet B irradiation up-regulates MM1 and induces photoageing of the epidermis 紫外线B照射上调MM1并诱导表皮光老化
Anal Chem. 2021 Aug 31;93(34):11775-11784.doi: 10.1021/acs.analchem.1c02197. Epub 2021 Aug 19. Facile Method for Specifically Sensing Sphingomyelinase in Cells and Human Urine Based on a Ratiometric Fluorescent Nanoliposome Probe 基于定量荧光纳米脂质体探针的简便特异性检测细胞和人尿液中鞘氨醇酶的方法
Cell Biosci. 2021 Aug 4;11(1):156.doi: 10.1186/s13578-021-00669-3. Modaline sulfate promotes Oct4 expression and maintains self-renewal and pluripotency of stem cells through JAK/STAT3 and Wnt signaling pathways通过JAKSTAT3和Wnt检测干细胞
Front Physiol. 2021 Aug 4;12:663482.doi:10.3389/fphys.2021.663482. eCollection 2021. Two Putative Cypovirus-Encoded miRNAs Co-regulate the Host Gene of GTP-Binding Nuclear Protein Ran and Facilitate Virus ReplicationmiRNA共同调节宿主基因GTP结合核蛋白Ran的表达
J Cell Mol Med. 2021 Jul;25(13):6242-6257.doi: 10.1111/jcmm.16579. Epub 2021 Jun 15. MACF1 alleviates aging-related osteoporosis via HES1 MACF1通过HES1缓解与衰老相关的骨质疏松症
Cell Death Differ. 2021 Jul;28(7):2160-2178.doi:10.1038/s41418-021-00744-9. Epub 2021 Mar 4. MACF1 promotes osteoblast differentiation by sequestering repressors in cytoplasmMACF1通过隔离促进成骨细胞分化
Genet Test Mol Biomarkers. 2021 Jun;25(6):399-404.doi: 10.1089/gtmb.2021.0019. Epub 2021 Jun 2.Whole-Exome Sequencing Reveals Novel TSPAN12 Variants in Autosomal Dominant Familial Exudative Vitreoretinopathy
Front Pharmacol. 2021 Jun 14;12:696729.doi:10.3389/fphar.2021.696729. eCollection 2021. Forsythiasides-Rich Extract From Forsythiae Fructus Inhibits Mast Cell Degranulation by Enhancing Mitochondrial Ca 2+ Uptake连翘抑制肥大细胞生长线粒体钙摄取
Biochem Pharmacol. 2021 Apr;186:114476.doi:10.1016/j.bcp.2021.114476. Epub 2021 Feb 17. Aloe-emodin, a naturally occurring anthraquinone, is a highly potent mast cell stabilizer through activating mitochondrial calcium uniporter芦荟大黄素
Gene. 2021 Apr 20;777:145450.doi: 10.1016/j.gene.2021.145450. Epub 2021 Jan 29. A 14-amino acids deletion in BmShadow results to non-moult on the 2nd instar in the bivoltine silkworm, Bombyx moriBmShadow中14个氨基酸的缺失导致二伏家蚕2龄时不蜕皮
FEBS Open Bio. 2021 Mar;11(3):890-897.doi: 10.1002/2211-5463.13109. Epub 2021 Feb 19. Pin1 and JNK1 cooperatively modulate TAp63γ Pin1和JNK1协同调节TAp63γ
Curr Microbiol. 2021 Feb;78(2):490-501.doi: 10.1007/s00284-020-02309-4. Epub 2021 Jan 2. 18 Additional Amino Acids of the Signal Peptide of the Bombyx mori Nucleopolyhedrovirus GP64 Activates Immunoglobulin Binding Protein (BiP) Expression by RNA-seq Analysis RNA-seq分析家蚕核多角体病毒GP64信号肽的18个额外氨基酸激活免疫球蛋白结合蛋白(BiP)的表达
ACS Appl Mater Interfaces. 2021 Feb 10;13(5):6043-6052.doi: 10.1021/acsami.0c21223. Epub 2021 Feb 1.A CRISPR-Cas9-Based Near-Infrared Upconversion-Activated DNA Methylation Editing System基于CRISPR-Cas9的近红外上转换激活DNA甲基化编辑系统 (IF:8.3).
Pharmacol Res. 2021 Jan;163:105230.doi:10.1016/j.phrs.2020.105230. Epub 2020 Oct 5. Long noncoding RNA AK039312 and AK079370 inhibits bone formation via miR-199b-5p长非编码RNA AK039312和AK079370抑制骨形成
Cell Death Differ. 2021 Jan;28(1):337-348.doi: 10.1038/s41418-020-00620-y. Epub 2020 Sep 9. RPS23RG1 modulates tau phosphorylation and axon outgrowth through regulating p35 proteasomal degradation RPS23RG1通过调节p35蛋白酶体降解调节tau磷酸化和轴突生长
Pharmacol Res. 2020 Oct 5;105230. doi: 10.1016/j.phrs.2020.105230 Long noncoding RNA AK039312 and AK079370 inhibits bone formation via miR-199b-5p
Biochem Biophys Res Commun. 2020 Dec10;533(3):613-619.doi:10.1016/j.bbrc.2020.09.063. Epub 2020 Sep 25. Prefoldin subunit MM1 promotes cell migration via facilitating filopodia formation预折叠蛋白亚单位MM1通过促进细胞迁移
Graefes Arch Clin Exp Ophthalmol. 2020 Oct;258(10):2251-2261.doi: 10.1007/s00417-020-04636-5.Epub 2020 Jun 7.Disease-causing mutations associated with bestrophinopathies promote apoptosis in retinal pigment epithelium cells.视网膜色素上皮细胞凋亡
Biochem Pharmacol. 2020 Jul;177:113984.doi:10.1016/j.bcp.2020.113984. Epub 2020 Apr 18. Ethyl-p-methoxycinnamate enhances oct4 expression and reinforces pluripotency through the NF-κB signaling pathway对甲氧基肉桂酸乙酯增强oct4表达并增强多能性
Small.2020 Jul;16(30):e1907301.doi: 10.1002/smll.201907301. Epub 2020 Jun 25.Photoactivatable RNA N 6 -Methyladenosine Editing with CRISPR-Cas13甲基腺苷编辑(IF:13.281).
Small. 2020 Jul;16(30):e1907301.doi: 10.1002/smll.201907301. Epub 2020 Jun 25. Photoactivatable RNA N6 -Methyladenosine Editing with CRISPR-Cas13 CRISPR-Cas13编辑可光激活RNA N6-甲基腺苷 (IF:13.3).
Front Genet.2020 May 26;11:511.doi: 10.3389/fgene.2020.00511. eCollection 2020.MICA ∗ 012:01 Allele Facilitates the Metastasis of KRAS-Mutant Colorectal Cancer.KRAS突变型结直肠癌的转移
J Ethnopharmacol. 2020 Mar 25:250:112499.doi: 10.1016/j.jep.2019.112499. Epub 2019 Dec 23. Ethanol extract of Elephantopus scaber Linn. Attenuates inflammatory response via the inhibition of NF-κB signaling by dampening p65-DNA binding activity in lipopolysaccharide-activated macrophages 非洲象的乙醇提取物。通过抑制脂多糖激活的巨噬细胞中p65 DNA结合活性抑制NF-κB信号传导来减轻炎症反应 (IF:5.195).
J Cell Biochem. 2019 Sep;120(9):14326-14335.doi: 10.1002/jcb.28538. Epub 2019 May 20. Bom-miR-2805 upregulates the expression of Bombyx mori fibroin light chain gene in vivo. Bom-miR-2805上调体内家蚕丝素轻链基因的表达。
Genes Dis.2019 Sep 17;8(1):94-109.doi: 10.1016/j.gendis.2019.09.005. eCollection 2021 Jan.SFs mediate the function of AR in the ovarian granulosa cells of patients with PCOS.SRSFs介导多囊卵巢综合征患者卵巢颗粒细胞AR的功能
Genes Dis. 2019 Sep 17;8(1):94-109.doi: 10.1016/j.gendis.2019.09.005. eCollection 2021 Jan. SRSFs mediate the function of AR in the ovarian granulosa cells of patients with PCOS SRSFs介导多囊卵巢综合征患者卵巢颗粒细胞AR的功能 (IF:6.9).
J Cell Physiol . 2019 Jul;234(7):11524-11536. doi: 10.1002/jcp.27815. Epub 2019 Jan 17. A novel long noncoding RNA AK016739 inhibits osteoblast differentiation and bone formation
Eur Rev Med Pharmacol Sci.2019 Apr;23(8):3291-3301.doi: 10.26355/eurrev_201904_17691.Increased long noncoding RNA LINC00511 is correlated with poor prognosis and contributes to cell proliferation and metastasis by modulating miR-424 in hepatocellular carcinoma.长链非编码RNA LINC00511与肝细胞癌预后不良相关,并通过调节miR-424促进细胞增殖和转移
ACS Sens.2019 Apr 26;4(4):977-983.doi: 10.1021/acssensors.9b00102. Epub 2019 Mar 21.Rapidly Visualizing the Membrane Affinity of Gene Vectors Using Polydiacetylene-Based Allochroic Vesicles.(IF:7.711).
Gene.2019 Mar10;688:98-106. doi:10.1016/j.gene.2018.11.095.
Embryonic morphology observation and HOXC8 gene expression in crest cushions of Chinese Crested duck
J Cell Physiol . 2018 Jul;233(7):5405-5419. doi: 10.1002/jcp.26374. Epub 2018 Jan 23. Mechanical unloading reduces microtubule actin crosslinking factor 1 expression to inhibit β-catenin signaling and osteoblast proliferation
Oncol Lett . 2018 Apr;15(4):4344-4350. doi: 10.3892/ol.2018.7831. Epub 2018 Jan 19. Synergistic effect of receptor-interacting protein 140 and simvastatin on the inhibition of proliferation and survival of hepatocellular carcinoma cells
Toxicol Appl Pharmacol . 2017 May 1;322:75-88. doi: 10.1016/j.taap.2017.03.003. Epub 2017 Mar 8. Molecular mechanisms of 3,3’4,4′,5-pentachlorobiphenyl-induced epithelial-mesenchymal transition in human hepatocellular carcinoma cells
Mol Med Rep . 2016 Feb;13(2):1725-31. doi: 10.3892/mmr.2015.4704. Epub 2015 Dec 22. Myricetin inhibits Kv1.5 channels in HEK293 cells.
Nat Commun . 2015 Aug 24;6:8022. Rhomboid domain containing 1 promotes colorectal cancer growth through activation of the EGFR signalling pathway. (IF:11.329).
Mol Cell Biol . 2015 Jul;35(14):2400-13. doi: 10.1128/MCB.00090-15. Epub 2015 May 4. SOCS3 Drives Proteasomal Degradation of TBK1 and Negatively Regulates Antiviral Innate Immunity
Oncotarget . 2015 May 30;6(15):13049-59. Wedelolactone disrupts the interaction of EZH2-EED complex and inhibits PRC2-dependent cancer. (IF:6.359).
Eur J Med Chem . 2014 Oct 6;85:119-26. doi: 10.1016/j.ejmech.2014.07.091. Epub 2014 Jul 25. Discovery of highly potent TNFα inhibitors using virtual screen.
Biochem Biophys Res Commun . 2014 Apr 4;446(2):523-8. doi: 10.1016/j.bbrc.2014.02.137. Epub 2014 Mar 12. eEF1Bγ is a positive regulator of NF-кB signaling pathway.
Int J Nanomedicine . 2013;8:3805-16. doi: 10.2147/IJN.S48950. Epub 2013 Oct 2. Efficacy and safety of dendrimer nanoparticles with coexpression of tumor necrosis factor-α and herpes simplex virus thymidine kinase in gene radiotherapy of the human uveal melanoma OCM-1 cell line. (IF:6.400).
J Immunol . 2013 Sep 1;191(5):2614-23. doi: 10.4049/jimmunol.1203143. Epub 2013 Aug 5. Enhancer of zeste homolog 2 is a negative regulator of mitochondria-mediated innate immune responses.
Appl Microbiol Biotechnol . 2013 Jul;97(14):6301-14. doi: 10.1007/s00253-013-4787-z. Epub 2013 Mar 6. Design, expression and characterization of a novel coexpression system of two antiarthritic molecules.
Heart Vessels . 2013 May;28(3):385-96. doi: 10.1007/s00380-012-0275-0. Epub 2012 Sep 1. Real-time tracking of adipose tissue-derived stem cells with injectable scaffolds in the infarcted heart.
PLoS One . 2012;7(11):e49567. doi:10.1371/journal.pone.0049567. Epub 2012 Nov 19. The ubiquitin ligase TRAF6 negatively regulates the JAK-STAT signaling pathway by binding to STAT3 and mediating its ubiquitination.
EntransterTM系列转染试剂的成分和原理,化学结构,粒径,电位等数据
siRNA转染与DNA转染有什么不一样?
为什么EntransterTM转染试剂有血清转染不仅没有毒性,反而有助于提高转染效率?
为什么EntransterTM系列转染试剂转染时可以有抗生素,而脂质体转染对抗生素敏感?
反向转染指先在培养板内形成DNA-试剂复合物,再加入悬浮细胞悬液,使复合物与细胞同步沉降接触。适用于HEK293T高通量筛选、慢病毒包装快速流程,以及希望省去”提前一天铺板”的实验。
1.实验过程(以6孔板为例)
预备:操作前先用胰酶消化HEK293T细胞,DMEM+10%FBS(无双抗)重悬至5-8×10⁵ cells/ml,置37℃备用。与⑴-⑶复合物制备过程并行进行,避免复合物在空孔内放置超过30分钟。
⑴将5μg的DNA用50μl无血清稀释液(OPTI-MEM或无血清DMEM)稀释,充分混匀(用量同正向,参考表1按容器对应;如做慢病毒包装,5μg为三质粒总量,按转移质粒:psPAX2:pMD2.G=4:3:1分配,参考五节5.病毒包装质粒配比)。
⑵将5μl的EntransterTM-H用50μl无血清稀释液稀释,混匀,室温静置5分钟。
⑶将EntransterTM-H稀释液缓慢加入到DNA稀释液中,充分混匀(加样器吹吸8-10次或短暂涡旋3-5秒,避免长时间剧烈振荡),室温静置15-20分钟(不超过25分钟)。转染复合物制备完成。
⑷将全部转染复合物(约100μl)均匀滴加入空培养孔,轻摇使其铺展于孔底。
⑸取预备好的细胞悬液(5-8×10⁵ cells/ml)约1.9ml加入到含复合物的孔中,终体积约2ml,对应每孔1.0-1.5×10⁶ cells。
⑹轻柔前后或左右摇动培养板(不可画圈,否则细胞会向中心聚集),放入培养箱培养。
⑺4-8h后细胞贴壁,可酌情换为新鲜完全培养基;用于慢病毒包装时换为2% FBS收毒培养基(低血清下病毒颗粒更稳定,便于后续浓缩)。常规检测时间同正向转染(24-48h);慢病毒包装收毒时间按五节4.收获时间。
2.注意事项
⑴反向转染细胞当天接种、当天转染,接种密度需直接达到正向转染时应有的水平(并补偿胰酶消化后的贴壁损耗):6孔板1.0-1.5×10⁶/孔,约为正向铺板密度的2倍,各容器接种量见表2。
⑵细胞重悬必须使用无双抗培养基,转染4-8h后换液时再加回双抗。
⑶复合物制备完成后应立即接种细胞,孔内放置不超过30分钟。
⑷不适用于神经元、原代肝细胞等极脆弱细胞——胰酶消化后再接种存活率不足。
3.不同培养容器反向转染完整用量(表2,HEK293T,核酸/试剂用量同正向)
|
培养容器 |
DNA量 |
EntransterTM-H用量 |
稀释液(每路) |
复合物总体积 |
接种细胞数 |
终培养体积 |
|
96-well |
0.25μg |
0.25μl |
5μl |
10μl |
3-5×10⁴ |
100μl |
|
48-well |
0.5μg |
0.5μl |
10μl |
20μl |
6-10×10⁴ |
200μl |
|
24-well |
1μg |
1μl |
25μl |
50μl |
1.2-2×10⁵ |
500μl |
|
12-well |
2μg |
2μl |
25μl |
50μl |
2.5-4×10⁵ |
1ml |
|
6-well/35-mm |
5μg |
5μl |
50μl |
100μl |
1.0-1.5×10⁶ |
2ml |
|
60mm/T25 flask |
10μg |
10μl |
125μl |
250μl |
2-3×10⁶ |
5ml |
|
100mm dish |
25μg |
25μl |
500μl |
1ml |
6-8×10⁶ |
15ml |
注:慢病毒包装等以产量最大化为目标的应用,反向接种密度可上调至接近满孔(6孔板2-3×10⁶/孔)。
注:反向转染时细胞处于刚贴壁起步阶段,对毒性较敏感。如出现细胞批量脱落或贴壁不良,按以下顺序排查:①试剂量下调20-30%(即降低试剂:DNA比例);②细胞接种密度降10-20%;③转染前6-12h做血清饥饿预适应。
EntransterTM-H可用于HEK293F、HEK293-6E、Expi293、HEK293T-suspension等悬浮细胞系的大规模转染,是慢病毒(LV)、腺相关病毒(AAV)、腺病毒(Ad)、重组抗体与重组蛋白生产的核心步骤,适合数十毫升到数十升级别的瞬时表达。
用量速查表(开始转染前先按培养体积查阅 DNA 与试剂用量)
|
培养体积 |
细胞密度 |
总DNA |
EntransterTM-H |
复合物稀释液(每路) |
|
30ml |
2×10⁶/ml |
30μg |
22.5-30μl |
3ml |
|
100ml |
2×10⁶/ml |
100μg |
75-100μl |
10ml |
|
250ml |
2×10⁶/ml |
250μg |
190-250μl |
25ml |
|
500ml |
2×10⁶/ml |
500μg |
375-500μl |
50ml |
|
1L |
2×10⁶/ml |
1mg |
750μl-1ml |
100ml |
|
3L |
2×10⁶/ml |
3mg |
2.25-3ml |
300ml |
注:3L 以上规模按表中比例线性放大(DNA 1μg/ml 培养、试剂 0.75-1.0μl/μg DNA、复合物体积 = 培养体积 × 20%)。
1.转染前细胞准备
细胞应处于对数生长期,存活率≥95%,传代次数30代以内。转染前一天按0.8-1.0×10⁶ cells/ml传代。转染当日细胞密度应达到1.8-2.2×10⁶ cells/ml,存活率≥95%。培养基使用对应细胞系的无血清悬浮培养基(如Freestyle 293、Expi293、F17、BalanCD HEK293、CDM4HEK293等;其中BalanCD HEK293性价比较高,性能接近Expi293/Freestyle expression medium而成本约低10倍)。不要使用PBS或含血清培养基稀释复合物。
2.复合物制备(以100ml培养体系为例)
⑴取100μg总质粒DNA加入10ml无血清稀释液(OPTI-MEM、150mM NaCl或5%葡萄糖),轻柔混匀。
⑵取75-100μl EntransterTM-H(对应转染试剂(μl):DNA(μg)=0.75:1—1:1)加入另一支10ml无血清稀释液,混匀,室温静置5分钟。
⑶将试剂稀释液缓慢加入DNA稀释液中,吹吸或轻柔倒置混匀,室温静置15分钟(严禁超过20分钟)。
⑷将20ml复合物沿摇瓶壁缓慢滴加到100ml培养液,边加边轻摇摇瓶,使复合物快速分散。严禁整管倒入一处,否则易导致细胞批量死亡。
⑸摇瓶置于37℃、5-8% CO₂(按培养基厂家推荐)、120-135rpm摇床培养。
3.增效与补料
⑴转染4-6h后补加增效剂,按应用分类选择:①重组蛋白生产:VPA(终浓度2-4mM)或NaB(1-2mM)均可,可显著延缓细胞凋亡、提高产量30-100%;②AAV包装:首选VPA(10倍滴度提升),严禁使用NaB(抑制AAV衣壳装配);③慢病毒包装:可选VPA(效果稳定),NaB个案差异较大。VPA经济性优于NaB(成本约为NaB的1/5)。
⑵转染24h后同步进行补料与温度切换:补加5-10%(v/v)补料培养基与3-6g/L葡萄糖;也可同步将温度由37℃降至32℃以延长产蛋白窗口期(对难表达蛋白尤其有效)。每24h监测一次葡萄糖与活率。
4.收获时间
|
应用 |
收获时间 |
收获形式 |
|
慢病毒(LV) |
转染后48h与72h各收一次合并 |
上清,4℃ 500g/10min去细胞,0.45μm过滤 |
|
AAV(三质粒法) |
72-96h |
细胞与上清同时收获(AAV2多在细胞内,AAV9上清比例高) |
|
腺病毒(Ad) |
CPE出现50-80%时收 |
细胞收获 |
|
重组抗体与蛋白 |
96-144h(活率降至60-70%时) |
上清 |
5.病毒包装质粒配比
⑴慢病毒(三质粒系统):转移质粒:psPAX2:pMD2.G = 4:3:1(质量比)。
⑵AAV(三质粒系统):pAAV-ITR-GOI:pAAV-RC(衣壳):pHelper = 1:1:2(质量比)。
⑶腺病毒:按厂家系统说明,多数以转移质粒为主。
6.注意事项
⑴复合物总体积一般为培养体积的20%(DNA稀释液与试剂稀释液各占10%;如100ml培养→各10ml稀释液,合计20ml复合物)。体积过小易聚集,过大稀释转染试剂浓度。
⑵质粒必须为无内毒素级(<0.1EU/μg)。大规模转染对内毒素极敏感,>1EU/μg会显著抑制细胞生长。
⑶转染当日禁止补料和换液。
⑷首次放大建议先在30ml体系做试剂(μl):DNA(μg)比梯度(0.5:1、0.75:1、1:1,对应30μg DNA用15/22.5/30μl试剂)+ 收获时间梯度(48h/72h/96h),再放大到目标体积。
⑸质粒节约策略(可选):可用salmon sperm DNA或非编码空载体作为填充DNA。推荐档:活性质粒占总DNA的20%,仍可达正常100%表达水平;极简档:活性质粒占总DNA的5-10%,可达约80%表达水平。两档均能显著降低大规模放大质粒成本。
|
问题 |
可能原因 |
解决方案 |
|
完全无表达(任意细胞均零信号) |
阳性对照不足或质粒构建缺陷 |
用已知有效质粒(如pEGFP-N1)做阳性对照排查;检查启动子在该细胞系活性(CMV在原代细胞效率低) |
|
完全无表达 |
DNA稀释液用了PBS或含血清培养基 |
必须用OPTI-MEM、150mM NaCl或5%葡萄糖 |
|
转染效率<10% |
细胞代数过高或处于衰老期 |
改用20代以内的细胞;HEK293T长期培养易丢失T-抗原 |
|
质粒纯度不足 |
参考二节质粒纯度要求(OD260/280=1.8-2.0、OD260/230>2.0、内毒素<0.1EU/μg) |
|
|
转染效率20-50% |
试剂(μl):DNA(μg)比未达最优 |
做0.5:1/1:1/1.5:1三点梯度筛选;参考表1按容器对应比例;首次使用某细胞系,建议做3×3 DoE:试剂(μl):DNA(μg)比 (0.5:1/1:1/1.5:1) × 细胞密度 (贴壁50/65/80%汇合,或悬浮1.5/2.0/2.5×10⁶/ml) |
|
细胞密度未达推荐区间 |
贴壁转染密度调至60-80%;过低或过高均显著影响效率 |
|
|
转染后细胞批量脱落漂浮 |
试剂过量或双抗协同毒性 |
降至1:1(μl:μg)以下;转染当下及前4-6h使用无双抗培养基,4-8h换液时再加回双抗 |
|
转染后24-48h细胞缓慢凋亡 |
质粒含内毒素 |
改用Endo-Free级试剂盒提取;目标值<0.1EU/μg |
|
排除以上仍有毒性 |
质粒表达产物本身具毒性 |
用pEGFP-N1等已知低毒质粒做对照,区分是试剂问题还是构建问题 |
|
复合物制备后出现絮状或沉淀 |
稀释液污染(PBS、血清、蛋白) |
改用新鲜OPTI-MEM或150mM NaCl重做;DNA与试剂稀释液严禁含血清 |
|
复合物呈乳白色浑浊 |
孵育时间>25min或DNA浓度过高 |
缩短至15-20min;增大稀释体积降低DNA浓度 |
|
反向转染细胞结团或贴壁不均 |
加细胞后画圈摇板 |
改为前后或左右轻柔摇动;严禁画圈,否则细胞向孔中心聚集 |
|
反向转染效率显著低于正向 |
复合物在空孔内放置过久 |
复合物制备完成后30min内必须接种细胞;超过30min效率显著下降 |
|
反向转染毒性较大、细胞贴壁后批量死亡 |
细胞处于刚贴壁起步阶段、对试剂毒性更敏感 |
按顺序排查:先将试剂量下调20-30%,仍不改善再降接种密度10-20%,最后可于转染前6-12h血清饥饿预适应 |
|
大规模悬浮加料后批量死亡 |
复合物整管倒入一处导致局部过载 |
必须沿摇瓶壁缓慢边加边摇瓶;首次放大可将比例降至0.75:1(μl:μg)试做 |
|
蛋白产量偏低(100ml培养<5mg) |
未做温度切换或未补VPA |
转染24h后降温至32℃;同时补VPA 2-4mM或NaB 1-2mM;监测葡萄糖与活率(AAV 包装仅用 VPA,禁 NaB) |
|
慢病毒滴度低(<10⁷ TU/ml) |
三质粒配比不对或转移质粒过大 |
严格按转移质粒:psPAX2:pMD2.G=4:3:1;>10kb转移质粒提至5:3:1;72h二次收毒合并 |
|
AAV滴度低 |
收获过早或衣壳未完全装配 |
推迟至96h收获;细胞与上清同时收(AAV2主要在胞内,AAV9上清比例高) |
常温运输,于4℃长期存储,有效期12个月。
本品使用安全,未发现任何生物、化学毒性。如不慎沾染,用清水冲洗即可。
北京英格恩生物科技有限公司本产品实行严格质量检验,并进行转染验证,以确保产品质量。请用户使用前务必认真阅读操作手册。如用户仍然有问题,请立即联系本公司人员,英格恩公司将负责提供全程技术服务。
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