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Related Concept Videos

Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Alternative RNA Splicing02:18

Alternative RNA Splicing

Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Satellite Stem Cells and Muscular Dystrophy01:21

Satellite Stem Cells and Muscular Dystrophy

Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...

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Related Experiment Video

Updated: May 11, 2026

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy
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Published on: May 24, 2016

Modified Polycyclic Compounds Rescue Mis-splicing in Myotonic Dystrophy Type 1 Disease Models.

Jesus A Frias1,2, Sawyer M Hicks1,2, Hormoz Mazdiyasni1

  • 1The RNA Institute, College of Arts and Sciences, University at Albany, State University of New York, Albany, New York 12222, United States.

ACS Chemical Biology
|February 20, 2026
PubMed
Summary
This summary is machine-generated.

New modified polycyclic compounds (MPCs) show promise for treating myotonic dystrophy type 1 (DM1). These compounds rescue splicing defects and reduce toxic RNA in DM1 models with minimal toxicity, offering a potential therapeutic avenue.

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Published on: April 3, 2021

Area of Science:

  • Biochemistry
  • Genetics
  • Pharmacology

Background:

  • Myotonic dystrophy type 1 (DM1) is a severe genetic disorder with no targeted treatments.
  • DM1 pathogenesis involves expanded CUG repeat RNA (CUGexp) sequestering MBNL proteins, causing splicing errors.

Purpose of the Study:

  • To develop novel therapeutics for DM1.
  • To identify compounds that can rescue DM1-associated splicing defects.

Main Methods:

  • Screening of modified polycyclic compounds (MPCs) in DM1 patient-derived cell lines.
  • Testing lead compounds (MPC03, MPC04) in a DM1 mouse model.
  • RNA binding assays and computational modeling to elucidate mechanism of action.

Main Results:

  • MPC03 and MPC04 rescued DM1 splicing defects at low nanomolar concentrations with no observed toxicity.
  • In vivo treatment reduced CUGexp RNA levels and partially corrected mis-splicing in a DM1 mouse model.
  • MPCs bind to CUGexp RNA, displacing MBNL proteins and restoring normal splicing.

Conclusions:

  • Modified polycyclic compounds (MPCs) represent a promising new class of therapeutics for DM1.
  • MPCs effectively target the disease mechanism by interacting with CUGexp RNA.
  • These compounds demonstrate therapeutic potential across cellular and animal models of DM1.