Control of specific gene expression in mammalian cells by co-expression of long complementary RNAs

Area of Science:

• Molecular Biology
• Genetics
• Cell Biology

Background:

• Long double-stranded RNA (dsRNA) mediated gene silencing is typically limited to embryonic cells.
• Differentiated cells often exhibit non-specific gene expression effects with dsRNA treatments.

Purpose of the Study:

• To investigate the regulation of gene expression in immortalized human cell lines using complementary RNA co-expression.
• To determine if this method can achieve specific gene silencing independently of Dicer.

Main Methods:

• Co-expression of complementary RNAs in immortalized human cell lines.
• Assessing gene silencing effects on foreign and endogenous genes.
• Evaluating the transferability of the silencing effect to recipient cells.
• Investigating the role of cytoplasmic Dicer in the observed phenomenon.

Main Results:

• Gene silencing was achieved in immortalized human cell lines using complementary RNA co-expression.
• The gene silencing effect was transferable to control cells.
• The mechanism operated independently of cytoplasmic Dicer.
• The approach generated epi-allelic series of clones suitable for gene function studies.

Conclusions:

• Complementary RNA co-expression is a viable method for specific gene regulation in mammalian cells.
• This technique overcomes limitations associated with dsRNA in differentiated cells.
• The method facilitates gene function studies through the generation of specific clones.