Conditional Knockdown of Endogenous MicroRNAs in CHO Cells Using TET-ON-SanDI Sponge Vectors

  • Alan CostelloEmail author
  • Nga Lao
  • Martin Clynes
  • Niall Barron
Part of the Methods in Molecular Biology book series (MIMB, volume 1603)


MicroRNAs (miRNAs) are small, noncoding RNAs of about 22 nucleotides in length and have proven to be useful targets for genetic modifications for desirable phenotype in the biotech industry. The use of constitutively expressed “miRNA sponge” vectors in which multiple, tandem miRNA binding sites containing transcripts are transcriptionally regulated by a constitutive promoter for down regulating the levels of endogenous microRNAs in Chinese hamster ovary (CHO) cells has shown to be more advantageous than using synthetic antisense oligonucleotides. The application of miRNA sponges in biotechnological processes, however, could be more effective, if expression of miRNA sponges could be tuned. In this chapter, we present a method for the generation of stable CHO cell lines expressing a TET-ON-SanDI-miRNA-sponge that is in theory expressed only in the presence of an inducer.

Key words

miRNA Sponge Knockdown Tetracycline TET-on Inducible CHO 



This work was supported by the Scientific Foundation of Ireland (SFI) grants numbers 13/IA/1963 and 13/IA/1841.


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Copyright information

© Springer Science+Business Media LLC 2017

Authors and Affiliations

  • Alan Costello
    • 1
    Email author
  • Nga Lao
    • 1
  • Martin Clynes
    • 1
  • Niall Barron
    • 1
  1. 1.National Institute for Cellular BiotechnologyDublin City UniversityDublinIreland

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