Related Experiment Video
Updated: Dec 22, 2025

Identification of Circular RNAs using RNA Sequencing
Published on: November 14, 2019
Circular RNA is a popular molecule in tumors of the digestive system (Review)
Hao-Ying Wang1, Yu-Ping Wang1, Xi Zeng1
1Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China.
Abstract:
Most tumors of the digestive system, including esophageal, gastric, liver and colorectal cancer, are malignant tumors that are associated with rates of high morbidity and mortality. The lack of effective methods for early diagnosis is an important cause of poor prognosis for these malignancies. Circular RNAs (circRNAs) belong to a family of endogenous, covalently closed non‑coding RNAs that are characterized as having no 5' cap structures or 3' poly‑A tails. Shortly following discovery, circRNAs were considered to be a product of mis‑splicing and have no significant biological function. However, in recent years, accumulating evidence is demonstrating that they serve key roles in tumorigenesis and have the potential to serve as diagnostic markers. The present article summarizes the biogenesis and function of circRNAs and reviews their role in seven common types of tumor of the digestive system whilst exploring their potential as tumor markers and the significant roles they can serve in the digestive system, in addition to providing a referencing point for future studies of digestive system malignancies.
Insights
Circular RNAs (circRNAs) are non-coding RNAs playing key roles in digestive system cancers. Research highlights their potential as early diagnostic markers for improved patient prognosis in esophageal, gastric, liver, and colorectal malignancies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Digestive system cancers (esophageal, gastric, liver, colorectal) exhibit high morbidity and mortality.
- Lack of effective early diagnostic methods contributes to poor prognosis in these malignancies.
- Circular RNAs (circRNAs) are non-coding RNAs with emerging roles in tumorigenesis.
Purpose of the Study:
- To summarize the biogenesis and function of circRNAs.
- To review the role of circRNAs in seven common digestive system tumors.
- To explore the potential of circRNAs as diagnostic markers for digestive system malignancies.
Main Methods:
- Literature review of circRNA biogenesis and function.
- Analysis of circRNA involvement in tumorigenesis across seven digestive system cancers.
- Evaluation of circRNAs as potential diagnostic biomarkers.
Main Results:
- CircRNAs are increasingly recognized for their significant roles in cancer development.
- Evidence suggests circRNAs can serve as valuable diagnostic markers for digestive system tumors.
- Understanding circRNA functions offers insights into cancer progression.
Conclusions:
- CircRNAs are crucial in the development of digestive system cancers.
- CircRNAs show promise as novel biomarkers for early cancer detection.
- Further research into circRNAs can advance the study of digestive system malignancies.
Related Concept Videos
Rous Sarcoma Virus (RSV) and Cancer
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
The Nucleolus
Mechanisms of Retrovirus-induced Cancers
Cancers Originate from Somatic Mutations in a Single Cell
lncRNA - Long Non-coding RNAs
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

