Myelodysplastic neoplasms represent a group of complex blood cancers that fundamentally affect bone marrow function. Recent research identifies Circular RNA in MDS as a significant biomarker for disease characteristics and patient outcomes. By performing ultra-deep RNA sequencing, researchers analyzed CD34+ cells to map these unique non-coding RNAs. Consequently, they found that circular RNA abundance is considerably higher in MDS patients than in healthy controls.

Clinical Impact of Circular RNA in MDS

Furthermore, specific mutational signatures within the spliceosome correspond to distinct expression patterns. For instance, the expression of circZEB1 is uniquely specific to patients with SF3B1 mutations. This high specificity allows clinicians to potentially use RNA landscapes to refine molecular diagnoses. Additionally, elevated levels of circRNAs correlate with a significantly increased risk of leukemic progression within three years. Therefore, these molecules offer a clear window into the future trajectory of the disease.

Interestingly, the proliferation-related gene MKI67 displays a negative correlation with overall circRNA abundance. Because many upregulated circRNAs show highly correlated expression, they may function as a cohesive regulatory network. Moreover, the study confirmed these key findings in an independent cohort of patients with ring sideroblasts. Specifically, monitoring these aberrant RNA patterns could enhance our ability to predict patient outcomes and tailor treatments more effectively in clinical hematology.

Frequently Asked Questions

What is the relationship between SF3B1 mutations and circRNA?

SF3B1 mutations in MDS are closely linked to the specific expression of circZEB1. This provides a precise molecular signature that is absent in cases without this mutation.

How does circRNA abundance affect MDS prognosis?

High levels of Circular RNA in MDS serve as a warning sign. These levels are associated with a significantly higher risk of disease progression to leukemia within a three-year window.

Why is MKI67 relevant to these RNA studies?

MKI67 is a known marker of cell proliferation. Its negative correlation with circRNA abundance suggests that these non-coding RNAs may play a complex role in regulating the cell cycle in malignant cells.

Disclaimer: This content is for informational and educational purposes only and is not intended as medical advice or to replace the professional judgment of a healthcare provider. Refer to the latest local and national guidelines for clinical practice.

References

Wedge E et al. Circular RNA expression landscapes in myelodysplastic neoplasms: Associations with mutational signatures and disease progression. Mol Oncol. 2026 Feb 19. doi: 10.1002/1878-0261.70208. PMID: 41711097.

He J et al. Circular RNAs in hematological malignancies: from biology to clinical applications. J Hematol Oncol. 2023.

Kristensen LS et al. The biogenesis, biology and characterization of circular RNAs. Nat Rev Genet. 2019.