At the heart of an innate immune response lies a tightly regulated gene expression program. This precise regulation is crucial because small changes can shift the balance from protective to destructive immunity. Here we identify a frequently used alternative splice site in the gene oligoadenylate synthetase 1g (), a key component of the 2-5A antiviral system. Usage of this splice site leads to the generation of a transcript subject to decay, and removal of the site leads to increased expression of and an improved antiviral response. However, removal of the splice site also leads to an increase in apoptotic cell death, suggesting this splicing event exists as a compromise between the pathogen protective benefits and collateral damage associated with OAS1g activity. Across the innate immune response, we show that a multitude of alternative splicing events predicted to lead to decay exist, and thus have the potential to play a significant role in the regulation of gene expression in innate immunity.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6961538 | PMC |
http://dx.doi.org/10.1261/rna.073825.119 | DOI Listing |
RNA
December 2024
Instiute of Bioorganic Chemistry PAS
In this article, we present an approach to maximizing the splicing regulatory properties of splice-switching oligonucleotide (SSO) designed to regulate alternative splicing of PKM pre-mRNA. The studied SSO interacts with the regulatory element in exon 10 of PKM pre-mRNA and contributes to a significant reduction of PKM2 level with a simultaneous increase of the PKM1 isoform. This SSO forms a duplex not only with the regulatory fragment of exon 10 but also with a similar RNA fragment of intron 9.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Institute of Neurology, Department of Medical and Surgical Sciences, University Magna Graecia, 88100 Catanzaro, Italy.
Pathogenic variants are associated with neonatal epilepsies, ranging from self-limited neonatal epilepsy to -developmental and epileptic encephalopathy (DEE). In this study, next-generation sequencing was performed, applying a panel of 142 epilepsy genes on three unrelated individuals and affected family members, showing a wide variability in the epileptic spectrum. The genetic analysis revealed two likely pathogenic missense variants (c.
View Article and Find Full Text PDFJ Am Heart Assoc
January 2025
Division of Cardiovascular Science, Faculty of Biology, Medicine and Health The University of Manchester Manchester UK.
Background: Heart failure with preserved ejection fraction (HFpEF) is linked to prolonged endoplasmic reticulum (ER) stress. P21-activated kinase 2 (Pak2) facilitates a protective ER stress response. This study explores the mechanism and role of Pak2 in HFpEF pathology.
View Article and Find Full Text PDFNat Commun
January 2025
Division of Genome Analysis Platform Development, National Cancer Center Research Institute, Tokyo, Japan.
Genomic variants causing abnormal splicing play important roles in genetic disorders and cancer development. Among them, variants that cause the formation of novel splice-sites (splice-site creating variants, SSCVs) are particularly difficult to identify and often overlooked in genomic studies. Additionally, these SSCVs are frequently considered promising candidates for treatment with splice-switching antisense oligonucleotides (ASOs).
View Article and Find Full Text PDFJ Med Genet
January 2025
Univ Rouen Normandie, Inserm U1245, Normandie Univ, CHU Rouen, Department of Genetics, F-76000, Rouen, France
Background: Li-Fraumeni syndrome (LFS) predisposes individuals to a wide range of cancers from childhood onwards, underscoring the crucial need for accurate interpretation of germline variants for optimal clinical management of patients and families. Several unclassified variants, particularly those potentially affecting splicing, require specialised testing. One such example is the NM_000546.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!