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Recently, the mRNA platform has become the method of choice in vaccine development to find new ways to fight infectious diseases. However, this approach has shortcomings, namely that mRNA vaccines require special storage conditions, which makes them less accessible. This instability is due to the fact that the five-prime and three-prime ends of the mRNA are a substrate for the ubiquitous exoribonucleases. To address the problem, circular mRNAs have been proposed for transgene delivery as they lack these ends. Notably, circular RNAs do not have a capped five-prime end, which makes it impossible to initiate translation canonically. In this review, we summarize the current knowledge on cap-independent translation initiation methods and discuss which approaches might be most effective in developing vaccines and other biotechnological products based on circular mRNAs.
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http://dx.doi.org/10.3390/vaccines11020238 | DOI Listing |
Int Dent J
September 2025
Shenzhen Clinical College of Stomatology, School of Stomatology, Southern Medical University, Shenzhen, China; Shenzhen Stomatology Hospital (Pingshan) of Southern Medical University, Shenzhen, China; Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, China. Electro
Background: Pulpitis is an oral disease primarily triggered by microbial infections. Current therapeutic strategies lack specific agents targeting the underlying pathogenic mechanisms. Non-coding RNAs (ncRNAs) and their competitive endogenous RNA (ceRNA) networks have emerged as critical regulators of diverse biological processes, offering novel insights into the pathogenesis of pulpitis and the identification of potential therapeutic targets.
View Article and Find Full Text PDFJ Transl Med
September 2025
School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, 100029, China.
Fatigue is a common but poorly understood issue in type 2 diabetes (T2DM) that affects quality of life. Although ceRNA networks regulate disease progression, their role in T2DM-related fatigue (F-T2DM) is unclear. This study developed a circRNA-mediated ceRNA network to uncover the molecular interactions causing fatigue in F-T2DM.
View Article and Find Full Text PDFAdv Exp Med Biol
August 2025
Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
Circular RNAs (circRNAs) are a recently discovered type of endogenous RNA molecules that are formed through the back-splicing process of exons in precursor messenger RNAs (pre-mRNAs), resulting in a unique covalently closed circular structure. CircRNAs are just beginning to be acknowledged for their roles as microRNA sponges and protein scaffolds, their ability to regulate transcription and splicing, and their occasional use as templates for polypeptide synthesis. However, the exploration of their functions is still in its early stages.
View Article and Find Full Text PDFAdv Exp Med Biol
August 2025
Cardiac Regeneration and Ageing Lab, Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong) and School of Life Science, Shanghai University, Nantong, China.
Circular RNAs (circRNAs) are a class of RNA molecules generated through back-splicing of precursor mRNAs, characterized by a covalent 3',5'-phosphodiester bond at the junction site. They are broadly categorized into exonic circRNAs, exonic-intronic circRNAs, and intronic circRNAs. CircRNAs perform diverse biological functions in various diseases, including acting as miRNA sponges, modulating protein synthesis via interactions with RNA-binding proteins (RBPs), directly influencing gene expression, and, in some cases, undergoing translation into proteins.
View Article and Find Full Text PDFAdv Exp Med Biol
August 2025
Faculty of Veterinary Medicine, Department of Genetics, Atatürk University, Erzurum, Turkey.
Circular RNAs (circRNAs) are a class of noncoding RNAs (ncRNAs), which has the formation of reverse splicing of mRNAs. Interest in their regulatory function has recently been increasing. The most important features are its stability between species, its high abundance, and its evolutionary conservation.
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