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Differential expression of miRNAs from extracellular vesicles in chronic graft-versus-host disease: A preliminary study

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WROCLAW MEDICAL UNIV
DOI: 10.17219/acem/155373

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allogeneic HSCT; extracellular vesicles; miRNA profiling; chronic GvHD

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This study aimed to identify biomarkers associated with the occurrence of cGvHD by analyzing miRNAs in plasma EVs. The results revealed that hsa-miR-630 and hsa-miR-374b-5p were downregulated in cGvHD patients, while hsa-miR-29c-3p was upregulated.
Background. Chronic graft-versus-host disease (cGvHD) is a complex disorder that typically manifests after allogeneic hematopoietic stem cell transplantation (HSCT). It is a major cause of non-relapse mortality, which makes finding biomarkers associated with its occurrence a priority. Recent studies increasingly indicate that microRNAs (miRNAs, short regulatory RNA molecules) can be used as biomarkers of various disorders. They can circulate in patients' bodies encapsulated within extracellular vesicles (EVs). Objectives. To identify miRNAs associated with the occurrence of cGvHD in EVs isolated from the plasma of patients after allogeneic HSCT. Materials and methods. We performed global miRNA expression profiling in a pilot cohort of 3 cGvHD cases and 4 non-cGvHD patients without disease symptoms 90 days after the transplantation (control group). Results. The 2 groups were naturally clustered according to their miRNA profiles using unsupervised hierarchical clustering analysis. We identified 3 miRNAs that were differentially expressed in the cGvHD patients compared to the non-cGvHD patients. The levels of hsa-miR- 630 and hsa-miR-374b-5p were lower in the cGvHD patients: 4.1-fold (p = 0.002) and 2.7-fold (p = 0.044), respectively. In contrast, the levels of hsa-miR-29c-3p were 5.8-fold higher (p = 0.004). Conclusions. Our results suggest that miRNA profiles from plasma EVs may act as markers of cGvHD onset.

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