Tick the specs you need to submit them together; or enquire one by one. Cat. numbers are carried into the RFQ.
Q:标准曲线扩增效率小于 90%或者大于 110%,线性关系不好,这样的问题如何解决?
A:加样误差。加大模板稀释倍数,提高加样体积,使不同稀释度的加样体积更准确;
标准品降解。重新制备标准品;
模板浓度太高。存在反应抑制,增加模板稀释倍数; 引物扩增特异性不好。重新设计引物。
Q:反应结束无扩增曲线出现
A:反应循环数不够,可适当增加循环次数。一般设置为 40,需注意过多的循环会增加背景信号,降低数据可信度;
确认程序中是否设置了信号采集步骤。三步法扩增程序应该将信号采集设置在 72℃延伸阶段, 两步法一般在退火延伸阶段收集;
确认引物是否降解。长时间未使用的引物应先通过PAGE 电泳检测完整性; 模板浓度太低。减少稀释度重复实验;
模板降解。重新制备模板。
Q:实验重复性差如何解决?
A:加样体积不准。定期校正移液器,将模板高倍稀释,以大体积加入反应体系中; 定量PCR 仪器不同位置温度控制不一致,定期校准仪器;
模板浓度太低。模板浓度越低,重复性越差; 做 4-6 个复孔,删除其中重复性不好的孔。
Q:模板的稀释液如何选择?
A:Nuclease-Free water、DEPC 水或实验室自备的 ddH2O 都可以。不推荐使用 TE 作为稀释液,TE 里有EDTA 会抑制酶的活性。
Published citations
[1] Liu CX, Li X, Nan F, et al. Structure and Degradation of Circular RNAs Regulate PKR Activation in Innate Immunity. Cell. 2019;177(4):865-880.e21. doi:10.1016/j.cell.2019.03.046(IF:36.216)
[2] Liu CX, Guo SK, Nan F, Xu YF, Yang L, Chen LL. RNA circles with minimized immunogenicity as potent PKR inhibitors. Mol Cell. 2022;82(2):420-434.e6. doi:10.1016/j.molcel.2021.11.019(IF:17.970)
[3] Chen S, Luo X, Wu W, et al. The long non-coding RNA MACC1-AS1 promotes nasopharyngeal carcinoma cell stemness via suppressing miR-145-mediated inhibition on SMAD2/MACC1-AS1 axis. Biomed Pharmacother. 2020;125:109986. doi:10.1016/j.biopha.2020.109986(IF:4.545)
[4] Wang J, Ren D, Sun Y, et al. Inhibition of PLK4 might enhance the anti-tumour effect of bortezomib on glioblastoma via PTEN/PI3K/AKT/mTOR signalling pathway. J Cell Mol Med. 2020;24(7):3931-3947. doi:10.1111/jcmm.14996(IF:4.486)
[5] Bi X, Jiang Z, Luan Z, Qiu D. Crocin exerts anti-proliferative and apoptotic effects on cutaneous squamous cell carcinoma via miR-320a/ATG2B. Bioengineered. 2021;12(1):4569-4580. doi:10.1080/21655979.2021.1955175(IF:3.269)
[6] Liu D, Wan L, Gong H, Chen S, Kong Y, Xiao B. Sevoflurane promotes the apoptosis of laryngeal squamous cell carcinoma in-vitro and inhibits its malignant progression via miR-26a/FOXO1 axis. Bioengineered. 2021;12(1):6364-6376. doi:10.1080/21655979.2021.1962684(IF:3.269)
[7] Shi M, Chen X, Li H, Zheng L. δ-tocotrienol suppresses the migration and angiogenesis of trophoblasts in preeclampsia and promotes their apoptosis via miR-429/ ZEB1 axis. Bioengineered. 2021;12(1):1861-1873. doi:10.1080/21655979.2021.1923238(IF:3.269)
[8] Tan Q, Lin S, Zeng Y, et al. Ginsenoside Rg3 attenuates the osimertinib resistance by reducing the stemness of non-small cell lung cancer cells. Environ Toxicol. 2020;35(6):643-651. doi:10.1002/tox.22899(IF:3.118)
[9] Liu X, Huang J, Xie Y, Zhou Y, Wang R, Lou J. Napabucasin Attenuates Resistance of Breast Cancer Cells to Tamoxifen by Reducing Stem Cell-Like Properties. Med Sci Monit. 2019;25:8905-8912. Published 2019 Nov 24. doi:10.12659/MSM.918384(IF:1.980)
[10] Guo W, Wei B, Cheng T, Xu X, Ruan F, Xiang M. The Na+/K+ ATPase Inhibitor Ouabain Attenuates Stemness and Chemoresistance of Osteosarcoma Cells. Med Sci Monit. 2019;25:9426-9434. Published 2019 Dec 11. doi:10.12659/MSM.919266(IF:1.980)
[11] Wu X, Wang Y, Zhong W, Cheng H, Tian Z. The Long Non-Coding RNA MALAT1 Enhances Ovarian Cancer Cell Stemness by Inhibiting YAP Translocation from Nucleus to Cytoplasm. Med Sci Monit. 2020;26:e922012. Published 2020 May 20. doi:10.12659/MSM.922012(IF:1.918)
[12] Wu X, Wang Y, Zhong W, Cheng H, Tian Z. RNA Binding Protein RNPC1 Suppresses the Stemness of Human Endometrial Cancer Cells via Stabilizing MST1/2 mRNA. Med Sci Monit. 2020;26:e921389. Published 2020 Feb 23. doi:10.12659/MSM.921389(IF:1.918)
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