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Title: Splicing dysregulation contributes to the pathogenicity of several F9 exonic point variants

Journal Article · · Molecular Genetics & Genomic Medicine
DOI: https://doi.org/10.1002/mgg3.840 · OSTI ID:1559339
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3]; ORCiD logo [1]
  1. US Food and Drug Administration, Silver Spring MD (United States). Hemostasis Branch, Division of Plasma Protein Therapeutics, Office of Tissues and Advanced Therapies, Center for Biologics Evaluation & Research
  2. University of Connecticut, Storrs, CT (United States). Department of Statistics
  3. Cleveland State University, Cleveland, OH (United States). Department of Biological, Geological and Environmental Sciences, Center for Gene Regulation in Health and Disease

Background: Pre-mRNA splicing is a complex process requiring the identification of donor site, acceptor site, and branch point site with an adjacent polypyrimidine tract sequence. Splicing is regulated by splicing regulatory elements (SREs) with both enhancer and suppressor functions. Variants located in exonic regions can impact splicing through dysregulation of native splice sites, SREs, and cryptic splice site activation. While splicing dysregulation is considered primary disease-inducing mechanism of synonymous variants, its contribution toward disease phenotype of non-synonymous variants is underappreciated. Methods: In this study, we analyzed 415 disease-causing and 120 neutral F9 exonic point variants including both synonymous and non-synonymous for their effect on splicing using a series of in silico splice site prediction tools, SRE prediction tools, and in vitro minigene assays. Results: The use of splice site and SRE prediction tools in tandem provided better prediction but were not always in agreement with the minigene assays. The net effect of splicing dysregulation caused by variants was context dependent. Minigene assays revealed that perturbed splicing can be found. Conclusion: Synonymous variants primarily cause disease phenotype via splicing dysregulation while additional mechanisms such as translation rate also play an important role. Splicing dysregulation is likely to contribute to the disease phenotype of several non=synonymous variants.

Research Organization:
Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; US Food and Drug Administration
Grant/Contract Number:
SC0014664
OSTI ID:
1559339
Alternate ID(s):
OSTI ID: 1559340; OSTI ID: 1623575
Journal Information:
Molecular Genetics & Genomic Medicine, Vol. 7, Issue 8; ISSN 2324-9269
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Variants in KIAA0825 underlie autosomal recessive postaxial polydactyly journal April 2019
Activated partial thromboplastin time-based clot waveform analysis enables measurement of very low levels of factor IX activity in patients with severe hemophilia B journal July 2022
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A new and updated resource for codon usage tables journal September 2017
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Molecular Basis and Therapeutic Strategies to Rescue Factor IX Variants That Affect Splicing and Protein Function journal May 2016
Mutations of Pre-mRNA Splicing Regulatory Elements: Are Predictions Moving Forward to Clinical Diagnostics? journal July 2017

Cited By (2)

Effects of codon optimization on coagulation factor IX translation and structure: Implications for protein and gene therapies journal October 2019
A Single Synonymous Variant (c.354G>A [p.P118P]) in ADAMTS13 Confers Enhanced Specific Activity journal November 2019

Figures / Tables (10)