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Related Concept Videos

Alternative RNA Splicing02:18

Alternative RNA Splicing

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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.
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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. 
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Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Hidden Splicing Variants in Inherited Retinal Degeneration: Discovery and Functional Insight.

Yu-Shu Huang1,2, Wen-Ting Lu3, I-Hsuan Chiu3

  • 1Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.

Investigative Ophthalmology & Visual Science
|October 8, 2025
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Summary
This summary is machine-generated.

A new platform for detecting splicing variants significantly improves the molecular diagnosis of inherited retinal degeneration (IRD). This approach uncovers previously missed pathogenic variants, enhancing genetic testing and paving the way for targeted therapies.

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Area of Science:

  • Genetics
  • Ophthalmology
  • Molecular Biology

Background:

  • Inherited retinal degeneration (IRD) poses a significant diagnostic challenge.
  • Conventional genetic testing often misses pathogenic splicing variants.
  • Accurate molecular diagnosis is crucial for patient management and therapeutic development.

Purpose of the Study:

  • To enhance molecular diagnosis of IRD by identifying pathogenic splicing variants.
  • To characterize the transcript-level consequences of these variants.
  • To improve the diagnostic yield of genetic testing for IRD.

Main Methods:

  • Analysis of 738 IRD families using targeted gene panel sequencing.
  • Implementation of a splicing variant detection pipeline integrating SpliceAI and dbscSNV_ADA.
  • Functional validation of splice-disrupting variants using minigene assays.

Main Results:

  • Splicing variants accounted for 14% of genetically diagnosed IRD families.
  • 4% of diagnoses were newly identified using the combined computational and experimental platform.
  • 28% of splice-disrupting variants in noncanonical, exonic, or deep-intronic regions were missed by conventional pipelines.

Conclusions:

  • A combined splicing variant detection platform enhances IRD diagnostic yield.
  • The platform effectively uncovers hidden pathogenic variants.
  • Findings support refining genetic testing and developing splicing-targeted therapies for IRD.