Discriminating RNA variants with single-molecule allele-specific FISH

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• DNA mutations can alter gene product localization and function.
• Mutant RNA transcripts play a significant role in human disease pathogenesis.
• Detecting low-abundance RNA variants with sequence differences requires sensitive methods.

Purpose of the Study:

• To review the variant-specific single-molecule fluorescence in situ hybridization (smFISH) methodology.
• To highlight the application of smFISH in studying RNA variants and their role in disease.
• To discuss the potential of allele-specific microscopic methods for analyzing diverse RNA variants.

Main Methods:

• Single-molecule fluorescence in situ hybridization (smFISH) using probes that discriminate among RNA variants.
• Imaging RNA transcripts produced from individual alleles.
• Analyzing transcription, processing, cellular localization, and decay of RNA variants.

Main Results:

• smFISH enables sensitive and specific imaging of RNA variants, including those with small sequence differences.
• The method allows for the visualization of allele-specific RNA expression and processing.
• Applications in studying physiological processes and disease-related mutation research are demonstrated.

Conclusions:

• Variant-specific smFISH is a powerful tool for deciphering RNA-mediated pathogenic mechanisms.
• The methodology aids in understanding various human diseases, including cancer, neurological, immunological, and cardiovascular diseases.
• Further development of allele-specific RNA imaging techniques, including live imaging, holds promise for broader applications.