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Controlling gene expression in living cells through small molecule-RNA interactions
1Howard Hughes Medical Institute, Program in Molecular Medicine, University of Massachusetts Medical Center, 373 Plantation Street, Suite 309, Worcester, MA 01605, USA.
Science (New York, N.Y.)
|October 9, 1998
Summary
Researchers developed a novel gene expression control method using RNA aptamers that bind small molecules. These aptamers function in vivo, allowing gene translation to be regulated by small molecules in living cells.
Area of Science:
- Molecular Biology
- Synthetic Biology
- Biotechnology
Background:
- RNA aptamers are short RNA molecules selected for specific ligand binding in vitro.
- Controlling gene expression in vivo with external molecules remains a significant challenge in biological research.
Purpose of the Study:
- To demonstrate that small molecule RNA aptamers can bind their targets in vivo.
- To develop a novel method for controlling gene expression in living cells using small molecule-inducible RNA aptamers.
Main Methods:
- Isolation of RNA aptamers specific to small molecules.
- Engineering messenger RNA (mRNA) by inserting aptamer sequences into the 5' untranslated region (UTR).
- Testing the regulation of mRNA translation by small molecule addition in vitro and in mammalian cells.
Main Results:
- Small molecule aptamers demonstrated ligand binding activity within living cells (in vivo).
- Insertion of aptamers into the 5' UTR of mRNA enabled ligand-dependent repression of translation.
- This regulatory mechanism was effective in both in vitro cell-free systems and in mammalian cells.
Conclusions:
- Small molecule-responsive RNA aptamers can function effectively in vivo to control gene expression.
- This technology provides a new platform for externally regulating specific gene activity in biological systems.
- The ability to control gene expression with small molecules has broad implications for research in biology and medicine.