The RNAi consortium (TRC) is a collaborative effort based at the Broad Institute of MIT and Harvard, and includes six MIT and Harvard associated research institutions and five international life sciences organizations. We have partnered with the TRC to make shRNA libraries available to researchers worldwide and has compiled shRNA libraries for applications, such as screening.
The pLKO.1 reagents can be packaged into virus particles for use in transduction experiments. Specifically, the replication-incompetent viral particles can be efficiently produced using lentiviral packaging plasmids co-transfected in 293T packaging cells. The Trans-Lentiviral Packaging System, which offers maximum biosafety and high titers, is recommended.
- Libraries available for applications, such as high throughput screening
- Cloned into lentiviral vectors
- Amenable to in vitro and in vivo applications, such as the creation of knockdown cell lines
- Lentiviral vector enables transduction of primary and non-dividing cells
- Further information is available at http://www.broad.mit.edu/genome_bio/trc/rnai.html
TRC shRNA library details
shRNA design and cloning:
The TRC shRNA constructs were designed using an siRNA rules based algorithm consisting of sequence, specificity, and position scoring for optimal hairpins. The hairpin consists of a 21-base stem and a 6-base loop. The hairpins were cloned into the pLKO1 vector and sequence verified.
Multiple (4 to 5) constructs were created for each target gene. The pLKO1 lentiviral vector enables efficient transduction of primary and non-dividing cells, such as neuronal cells, making it easy to perform RNAi studies in these hard to transfect cell lines. Stable selection is also possible using the puromycin selectable marker.
Replication-incompetent viral particles can be efficiently produced using lentiviral packaging plasmids co-transfected in 293T packaging cells. The Trans-Lentiviral packaging system, which offers maximum biosafety and high titers, is recommended.
Available controls include the pLKO.1 empty vector as a negative control and an eGFP shRNA as a positive control.
Citing the library in Scientific Publications
In scientific publications, the libraries should be referred to as TRC-Hs1.0 (Human) and TRC-Mm1.0 (Mouse). Individual clones are uniquely identified by their TRC ID number (eg. TRCN0000014783).
The TRC lentiviral shRNA libraries are provided in 96-well microtiter plates containing frozen stock cultures of E. coli in 2X �LB broth with 8% �glycerol and carbenicillin (100 � �g/mL). Individual shRNA constructs are shipped as glycerol stock cultures on wet ice. We check all cultures for growth prior to shipment.
- J. Moffat et al., A Lentiviral RNAi Library for Human and Mouse Genes Applied to an Arrayed Viral High-Content Screen. Cell. 124, 1283-1298 (2006).
- S. A. Stewart et al., Lentivirus-delivered stable gene silencing by RNAi in primary cells. RNA. 9, 493-501 (2003).
- R. Zufferey et al., Multiply attenuated lentiviral vector achieves efficient gene delivery in vivo. Nat. Biotechnol. 15, 871-885 (1997).
- R. Zufferey et al., Self-inactivating lentivirus vector for safe and efficient in vivo gene delivery. J. Virol. 72, 9873-9880 (1998).
- T. Yamamoto, Y. Tsunetsugu-Yokota, Prospects for the therapeutic application of lentivirus-based gene therapy to HIV-1 infection. Curr. Gene Ther. 8(1), 1-8 (2008).
The RNAi Consortium (TRC) pLKO.1 lentiviral vector
Gene silencing with TRC lentiviral shRNA