Human ON-TARGETplus siRNA Library - Drug Targets

siRNA designed and modified for greater specificity


An arrayed collection of siRNA reagents for RNAi screening, targeting human genes that are potential therapeutic targets. ON-TARGETplus siRNA is guaranteed to silence, and is modified to reduce off-targets for fewer false positives.

The Human ON-TARGETplus Drug Targets siRNA library includes genes involved with apoptosis, senesence, nucleic acid binding, autophagy, DNA repair, and characterized nuclear receptors, along with other genes that are considered potential targets for therapeutics not already contained in other libraries. Drug Targets may be ordered on its own or as one of nine subset libraries in the ON-TARGETplus Druggable Genome siRNA library.

The ON-TARGETplus siRNA designs and modifications reduce off-target effects while maintaining high silencing potency for high-confidence screening results.

Highlights

  • Patented dual-strand ON-TARGETplus modification pattern on all siRNAs to reduce off-targets
  • Available as SMARTpool siRNA reagents or a Set of 4 siRNAs in 96- or 384-well plates
  • Guaranteed target gene knockdown (see Specifications tab)
To support high-throughput screening environments, pre-defined and custom siRNA libraries in 384-well format may be provided in plates compatible with the Labcyte Echo acoustic liquid handler upon request (*P-05525  Echo Qualified 384-well Polypropylene Microplate; 384PP).
  
HazardousNo
Shelf Life12 Months
Shipping ConditionAmbient
Storage Condition-20 C

Our siRNA knockdown guarantee

siGENOME and ON-TARGETplus siRNA reagents (SMARTpool and three of four individual siRNAs) are guaranteed to silence target gene expression by at least 75% at the mRNA level when used under optimal delivery conditions (confirmed using validated positive control and measured at the mRNA level 24 to 48 hours after transfection using 100 nM siRNA).

Note: Most siGENOME and ON-TARGETplus siRNA products are highly functional at 5 to 25 nM working concentration.

Drug Targets make up part of Druggable Genome Collection

Drug Targets make up part of Druggable Genome Collection

Drug Targets make up part of Druggable Genome Collection

The Drug Targets siRNA library consists of high-confidence gene targets based on publications that characterize potential druggable targets and was assembled with use of innovative bioinfomatics tools to analyze genetic and ontological information from multiple databases. This siRNA collection excludes gene targets available in other siRNA libraries: kinases, g-protein coupled receptors, proteases, phosphatases, ion channels, and genes involved with ubiquitin conjugation.


False phenotypes due to off-targets are alleviated by ON-TARGETplus SMARTpool reagents while target gene knockdown is maintained

False phenotypes due to off-targets are alleviated by ON-TARGETplus SMARTpool reagents while target gene knockdown is maintained

False phenotypes due to off-targets are alleviated by ON-TARGETplus SMARTpool reagents while target gene knockdown is maintained

The effect of silencing ARPC1B on cell migration was studied in a breast cancer cell line. A monolayer of cells was uniformly scraped and the rate of cell migration to close the scrape (wound healing) was evaluated. Both unmodified and ON-TARGETplus siRNA reagents induced potent target knockdown. Inconsistent phenotypes due to off-target effects (red outline), were observed for cells transfected with unmodified individual siRNAs. The unmodified SMARTpool improved the false phenotype considerably, while the ON-TARGETplus SMARTpool significantly reduced off-target effects to produce a consistent phenotype. In collaboration with Kaylene Simpson, Laura Selfors and Joan Brugge, Harvard Medical School.


ON-TARGETplus modifications reduce the overall number of off-targets and pooling reduces them even further

ON-TARGETplus modifications reduce the overall number of off-targets and pooling reduces them even further

ON-TARGETplus modifications reduce the overall number of off-targets and pooling reduces them even further

(A) and (B) are representative examples of off-target signatures with and without application of ON-TARGETplus modifications to (A) a single siRNA and (B) a SMARTpool reagent. Green bars indicate genes with 2-fold or more reduction of expression when treated with the indicated siRNA reagent. The ON-TARGETplus modifications reduced the off-targets when compared to unmodified siRNA. Pooling of siRNA and the ON-TARGETplus modification pattern independently, and in combination, provide significant reduction in off-target gene silencing. Panel (C) represents quantitation of off-targets (down-regulated by 2-fold or more) induced by the indicated siRNA reagents targeting 10 different genes (4 siRNAs per gene or a single SMARTpool reagent). Off-targets were quantified using microarray analysis (Agilent) then compiled. Each shaded box represents the middle 50% of the data set. Horizontal line in box: Median value of the data set. Vertical bars: minimum and maximum data values.


References

  1. Product References
  2. A. L. Hopkins, How many drug targets are there? Nature Reviews Drug Discovery. 5(12), 993-996 (December 2006).
  3. K. R. Sakharkar, Targetability of human disease genes. Current Drug Discovery Technologies. 4(1), 48-58 (June 2007).
  4. General Screening References
  5. B.D. Parsons, A. Schindler, D.H. Evans, E. Foley, A direct phenotypic comparison of siRNA pools and multiple individual duplexes in a functional assay. PLoS One. 4(12), e8471 (2009).
  6. M. Jiang, R. Instrell, B. Saunders, H. Berven, M. Howell, Tales from an academic RNAi screening facility; FAQs. Brief Funct. Genomics. 10(4), 227-237 (2011). [doi: 10.1093/bfgp/elr016]
  7. J. Borawski, A. Lindeman, F. Buxton, M. Labow, L.A. Gaither, Optimization procedure for small interfering RNA transfection in a 384-well format. J. Biomol. Screen. 12(4), 546-559 (2007).

Citations

  1. T. Ratovitski, E. Chighladze, E. Waldron, R. R. Hirschhorn, C. A. Ross, Cysteine proteases bleomycin hydrolase and cathepsin Z mediate N-terminal proteolysis and toxicity of mutant huntingtin. J. Biol. Chem. 286(14), 12578-12589 (2011). [Human Proteases]