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Circular RNAs regulate hepatic lipid metabolism in NAFLD and MASLD via key signaling pathwaysCircular RNAs May Offer New Paths for Fatty Liver Disease

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Key Takeaway
Consider circRNAs as emerging regulators in NAFLD/MASLD, but clinical application awaits further study.

This systematic review examines the regulatory mechanisms and clinical implications of circular RNAs (circRNAs) in hepatic lipid metabolism for non-alcoholic fatty liver disease (NAFLD) and metabolic dysfunction-associated steatotic liver disease (MASLD). The authors synthesize evidence showing that circRNAs influence key signaling pathways, including AMPK, mTOR, PPAR, and SREBP. They achieve this by acting as microRNA sponges, interacting with proteins, or encoding functional peptides. The review also highlights the potential of circRNAs as diagnostic biomarkers and therapeutic targets for these conditions. However, the authors note that clinical translation of circRNAs is currently limited by several challenges, such as delivery, stability, and specificity. The findings are based on a systematic review of the literature, but no pooled effect sizes or quantitative synthesis are provided. The practice relevance lies in the potential for circRNAs to serve as novel biomarkers and targets, but further research is needed to overcome translational hurdles.

Researchers are looking into the role of circular RNAs, which are unique types of RNA molecules. These molecules may play a significant role in how the body manages fat in the liver. This is important because conditions like non-alcoholic fatty liver disease (NAFLD) and metabolic dysfunction-associated steatotic liver disease (MASLD) affect many people.

The research shows that these circular RNAs can influence several signaling pathways in the liver. They do this by interacting with proteins or acting as sponges for other molecules. These interactions help control how fat is processed and stored. Because of these roles, scientists believe they could eventually be used to identify the disease earlier or become targets for new medications.

While these findings are promising, it is important to note that this research is currently in the early stages. There are still many challenges when it comes to turning these discoveries into practical treatments for patients. For now, these results highlight potential areas for future medical study rather than immediate changes in how fatty liver disease is treated today.

What this means for you:
Circular RNAs show promise as future tools for diagnosing and treating fatty liver diseases like NAFLD and MASLD.

Common questions

What are circular RNAs and how do they affect the liver?

Circular RNAs are molecules that can influence important signaling pathways in the liver, such as AMPK and mTOR. They work by interacting with proteins or acting as sponges for microRNAs. These actions help regulate how fat is processed in the liver, which is a key factor in conditions like NAFLD and MASLD.

Can circular RNAs be used to treat fatty liver disease?

The research suggests that circular RNAs have potential as therapeutic targets for fatty liver diseases. However, there are currently several challenges facing the clinical translation of these molecules. This means they are not yet ready for use as standard medical treatments.

Can these molecules help in diagnosing liver conditions?

Yes, circular RNAs have been identified as potential diagnostic biomarkers. This means they could eventually help doctors identify fatty liver diseases like NAFLD and MASLD more effectively. However, further research is needed to overcome current hurdles before they can be used in clinical practice.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
Hepatic lipid metabolism homeostasis is crucial for maintaining metabolic health, and its disruption is a central factor in the development of metabolic diseases such as non-alcoholic fatty liver disease (NAFLD) and metabolic dysfunction-associated steatotic liver disease (MASLD). Circular RNAs (circRNAs),a novel class of non-coding RNAs characterized by their covalently closed loop structures and remarkable stability, have emerged as key regulators of gene expression. Recent studies have revealed that circRNAs play significant roles in modulating critical hepatic lipid metabolism signaling pathways, including AMPK, mTOR, PPAR, and SREBP. This review systematically summarizes the latest advances in understanding how circRNAs influence these pathways through mechanisms such as acting as molecular sponges for microRNAs, interacting with proteins, and potentially encoding functional peptides. We critically evaluate the experimental models used in key studies, distinguishing between in vitro, in vivo, and clinical evidence, and discuss the context-dependent nature of circRNA function. Furthermore, the potential of circRNAs as diagnostic biomarkers and therapeutic targets for NAFLD and MASLD is discussed, highlighting their clinical relevance alongside a balanced assessment of the challenges facing clinical translation. By integrating current research findings, this review aims to provide a comprehensive theoretical foundation for elucidating the regulatory networks governing hepatic lipid metabolism and for developing innovative intervention strategies against metabolic liver diseases.
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