Publication — IRIC

A simple approach for multi-targeted shRNA-mediated inducible knockdowns using Sleeping Beauty vectors.

shRNA expression is an established technique to transiently or permanently deplete cells of a particular mRNA/protein. In functional analyses of oncogenic pathways it can thus be used as an alternative to pharmacologic inhibitors, or as a means to address otherwise undruggable targets. Here we describe and functionally validate a simple reiterative cloning system to generate concatenated multi-shRNA expression plasmids. The multi-shRNA expression cassette can eventually be subcloned into any suitably designed vector for the stable transfection of cells, here tested with derivatives of the Sleeping Beauty transposon vector for stable transfection of multiple myeloma cell lines at the lowest biosafety level. We finally test inducible versions of such multi-cassette knockdown vectors and show their efficacy for the induced concerted knockdown of all four components of the MEK/MAPK-module in the Ras/MAPK pathway. The described vector system(s) should be useful for functional knockdown analyses in a wide array of cell line models.

Publication date
October 19, 2018
Principal Investigators
Fink S, Zugelder L, Roth B, Brandt E, Meloche S, Izsvák Z, Bargou RC, Stühmer T
PubMed reference
PLoS ONE 2018;13(10):e0205585
PubMed ID
Comprehensive Cancer Center Mainfranken, University Hospital of Würzburg, Würzburg, Germany.