Abstract
Objective
MicroRNAs are fine regulators for gene expression during the post-transcriptional stage in many autoimmune diseases. HypoxamiRs (miR-210 and miR-21) play an important role in hypoxia and in inflammation-associated hypoxia. Systemic lupus erythematosus (SLE) is a chronic systemic autoimmune disease that would potentiate many pathological complications, including hemolytic anemia. This study aimed to investigate the role of hypoxamiRs in SLE/hemolytic anemia patients.
Methods
This work was designed to analyze the circulating levels of↱ the miR-210 and miR-21 expressions and hypoxia-inducible factor-1α (HIF-α) in SLE/hemolytic anemia patients. SLE activity was evaluated for all patients by SLE Disease Activity Index (SLEDAI). Clinical manifestations/complications and serological/hematological investigations were reported. HIF-α concentration was assayed by ELISA and expression of miR-21 and miR-210 was analyzed by qRT-PCR.
Results
The results indicated that the fold change of the miR-210/miR-21 expressions in plasma was significantly elevated in SLE/hemolytic anemia patients. A strong positive correlation between the miR-210 and miR-21 expression levels was also recorded. Among the associated-disease complications, hypertension, arthritis, oral ulcers, and serositis were associated with a high circulating miR-210 expression, while the occurrence of renal disorders was associated with the increased miR-21 expression. Furthermore, the HIF-α level was remarkably elevated in SLE/hemolytic anemia patients. A high positive correlation was recorded between the HIF-α concentration and miR-210/miR-21 expression levels. The occurrence of oral ulcers, arthritis, and hypertension was associated with the increased HIF-α concentration. On the other hand, SLEDAI and white blood cell count were positively correlated with miR-21/ miR-210. The erythrocyte sedimentation rate was positively correlated with miR-21.
Conclusion
The dysregulation of the circulating miR-210/miR-210/HIF-1α levels in SLE/hemolytic anemia patients advocated that the hypoxia pathway might have an essential role in the pathogenesis and complications of these diseases.
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Acknowledgment
This work was supported by the Taif University Researchers Supporting Project (No. TURSP-2020/103).
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Gamal-Eldeen, A.M., Fahmy, C.A., Raafat, B.M. et al. Circulating Levels of Hypoxia-regulating MicroRNAs in Systemic Lupus Erythematosus Patients with Hemolytic Anemia. CURR MED SCI 42, 1231–1239 (2022). https://doi.org/10.1007/s11596-022-2644-y
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DOI: https://doi.org/10.1007/s11596-022-2644-y