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Updated: May 8, 2026
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Using In Vitro and In-cell SHAPE to Investigate Small Molecule Induced Pre-mRNA Structural Changes
Published on: January 30, 2019
Reducing levels of toxic RNA with small molecules
Leslie A Coonrod1, Masayuki Nakamori, Wenli Wang
1Institute of Molecular Biology and §Department of Chemistry and Biochemistry, University of Oregon , Eugene, Oregon 97403, United States.
ACS Chemical Biology
|September 14, 2013
Summary
Heptamidine, a pentamidine analogue, effectively reverses splicing defects and alleviates myotonia in mouse models of myotonic dystrophy (DM). This discovery offers a promising therapeutic avenue for this common form of muscular dystrophy.
Area of Science:
- Molecular Biology
- Genetics
- Pharmacology
Background:
- Myotonic dystrophy (DM) is a common, autosomal dominant muscular dystrophy.
- It stems from expanded noncoding CTG/CCTG repeats producing toxic RNA.
- This toxic RNA sequesters Muscleblind-like (MBNL) proteins, disrupting alternative splicing.
Purpose of the Study:
- To investigate small molecules for treating DM-associated splicing defects.
- To explore pentamidine analogues as potential DM therapeutics.
- To assess heptamidine's efficacy in DM models.
Main Methods:
- Screening for small molecules that correct DM splicing defects.
- Biochemical assays, cell, and mouse model studies.
- Analysis of pentamidine analogues, including heptamidine.
Main Results:
- Pentamidine was previously identified to improve DM splicing defects.
- Pentamidine and related compounds may inhibit transcription by binding repeat DNA.
- Heptamidine demonstrated reversal of splicing defects and rescued myotonia in a DM1 mouse model.
Conclusions:
- Heptamidine shows significant therapeutic potential for myotonic dystrophy.
- Targeting toxic RNA or repeat DNA offers a viable strategy for DM treatment.
- Further development of pentamidine analogues could lead to effective DM therapies.
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