negative‐control shrna (shctrl, mfcd07785395) (Millipore)
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Negative‐Control Shrna (Shctrl, Mfcd07785395), supplied by Millipore, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/shrna+negative+control+%28shctrl/pmc10787103-334-19-30?v=Millipore
Average 90 stars, based on 1 article reviews
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1) Product Images from "A Mammalian Conserved Circular RNA CircLARP1B Regulates Hepatocellular Carcinoma Metastasis and Lipid Metabolism"
Article Title: A Mammalian Conserved Circular RNA CircLARP1B Regulates Hepatocellular Carcinoma Metastasis and Lipid Metabolism
Journal: Advanced Science
doi: 10.1002/advs.202305902
Figure Legend Snippet: CircLARP1B destabilizes LKB1 mRNA via perturbing HNRNPD. a–d) Stability assay of LKB1 mRNA and the steady levels of LKB1 protein (examined by western blotting) in human PLC cells (a,b) and murine Hepa1‐6 cells (c,d) treated siRNA against HNRNPD. siNC, negative control siRNA with scrambled sequences. e) Overall experimental strategy of eIF4E and eIF4G1 RIP assays. RNase I is introduced to digest unprotected RNAs across the IP procedure. Western blots showing HNRNPD knockdown efficiency and efficient IPs of eIF4E and eIF4G1 in PLC cells treated with siRNA against HNRNPD (right). ACTB protein acted as the loading control. f) Primers against various regions of LKB1 mRNA (top) and enrichment of LKB1 mRNA regions with eIF4E or eIF4G1 by RT‐qPCR (bottom). g,h) Stability assay of LKB1 mRNA (g) and the steady levels of LKB1 protein (h) in WT or circLARP1B‐Def PLC cells. i,j) Stability assay of Lkb1 mRNA (i) and the steady levels of Lkb1 protein (j) in Hepa1‐6 cells treated with shcircLARP1B or shCtrl. shCtrl, shRNA control that generates siRNA of scrambled sequences; shcircLARP1B, shRNA against the murine circLARP1B BSJ. k) In vitro competing assay of purified HNRNPD protein for equal moles of in vitro synthesized circLARP1B and LKB1 3′ UTR. An illustration of the assay was shown (top). Semiquantitative RT‐PCR gels and RT‐qPCR for circLARP1B and LKB1 3′ UTR were indicated (bottom). LKB1 3′ UTR, in vitro transcribed LKB1 3′ UTR fragments with the HNRNPD binding sequence. l) Association of LKB1 mRNA examined by RT‐qPCR of HNRNPD RIP in PLC cells treated with oligodeoxynucleotide antisense to two HNRNPD binding motifs in circLARP1B (ODN‐AS) or the control (ODN‐Ctrl, ODN with scrambled sequences). Two motifs with reverse complementary sequences were indicated with underlines. PS, phosphorothioate; 2′‐OMe, 2′‐ O ‐methyl. Western blot images indicate successful IP of HNRNPD protein. Enrichment, normalized to IgG. m) Western blotting and the corresponding quantification showing the steady level of LKB1 protein in PLC cells transfected with ODN‐AS or ODN‐Ctrl. (b,d,h,j,m) The grayscale statistics of western blotting were performed by ImageJ. (a–d,f–m) Data are shown as mean ± SD from three independent experiments. (a,c,g,i) P ‐values by two‐way ANOVA test. (b,d,f,h,j,l,m) P ‐values by two‐tailed unpaired Student's t ‐test.
Techniques Used: Stability Assay, Western Blot, Negative Control, Quantitative RT-PCR, shRNA, In Vitro, Purification, Synthesized, Reverse Transcription Polymerase Chain Reaction, Binding Assay, Sequencing, Protein Enrichment, Transfection, Two Tailed Test
Figure Legend Snippet: CircLARP1B deficiency in mice causes liver changes attributable to Lkb1 surplus. a) Strategy of knockout (KO) reverse‐complementary sequence in mouse Larp1b intron 4 using CRISPR‐Cas9. PCR products of mouse genotyping are shown. WT, wildtype; circLARP1B −/− , KO of the intronic reverse‐complementary sequences; B1, mouse B1 repeat. b) RT‐qPCR analysis of the steady levels and nascent levels (with nuclear run‐on assay) of circLARP1B and Larp1b mRNA in WT and circLARP1B −/− mouse liver. Data are from three independent experiments. c) Representative Oil Red O staining and the quantification in WT and circLARP1B −/− mouse liver ( N = 5 per group). Nuclei stained with hematoxylin (blue). Scale bar: 50 µm. d) Representative IHC staining and quantification of the proteins in liver from WT and circLARP1B −/− mice ( N = 5 per group). Scale bar: 50 µm. AOD, average optical density. e) Western blot of the indicated proteins in livers from WT or circLARP1B −/− mice. f) Representative Lkb1 IHC staining in livers from WT or circLARP1B −/− mice with the intravenous tail injection of AAV8‐shCtrl or AAV8‐shLkb1 for three weeks ( N = 5 per group). Scale bar: 50 µm. g) Representative Oil Red O staining in liver from WT or circLARP1B −/− mice with AAV8‐shCtrl or AAV8‐shLkb1 injection ( N = 5 per group). shCtrl, negative control shRNA construct that gives rise to siRNA with scrambled sequences. Nuclei stained with hematoxylin (blue). Scale bar: 50 µm. h) Representative IHC staining of the indicated proteins in liver from WT or circLARP1B −/− mice with AAV8‐shCtrl or AAV8‐shLkb1 injection ( N = 5 per group). Scale bar: 50 µm. i) Western blot of the indicated proteins in livers from WT or circLARP1B −/− mice with AAV8‐shCtrl or AAV8‐shLkb1 injection. Data are shown as mean ± SD. (c,g) Lipid level is defined as the percentage of Oil Red positive area calculated by Image‐Pro plus. (d,f,h) The IHC signal is defined as the average optical density (AOD) calculated by ImageJ. (e,i) The grayscale statistics of western blotting was performed by ImageJ. (c–i) All animals were kept in a controlled environment (23–25 °C with a 12‐h light‐dark cycle and lights on at 8:00 AM), on normal diet feeding with free access to water; all data were from mice at 9:00 AM. (b–d,f–h) P ‐values by two‐tailed unpaired Student's t ‐test.
Techniques Used: Knock-Out, Sequencing, CRISPR, Quantitative RT-PCR, Nuclear Run-on Assay, Staining, Immunohistochemistry, Western Blot, Injection, Negative Control, shRNA, Construct, Two Tailed Test


