Long non-coding RNA colorectal neoplasia differentially expressed correlates negatively with miR-33a and miR-495 and positively with inflammatory cytokines in asthmatic children

Abstract

Objectives: It is reported that long non-coding RNA (lncRNA) colorectal neoplasia differentially expressed (CRNDE) targets microRNA (miR)-33a, miR-181a and miR-495 to regulate inflammation process, while few studies report their clinical application for paediatric asthma management. Therefore, this study aimed to explore the interaction of lncRNA CRNDE with miR-33a, miR-181a and miR-495, as well as their correlation with inflammation, exacerbation risk and severity in paediatric patients with asthma.

Methods: Asthmatic exacerbation children (N = 65), asthmatic controlled children (N = 65) and controls (N = 65) were recruited. LncRNA CRNDE, miR-33a, miR-181a and miR-495 expressions in peripheral blood mononuclear cells were detected by RT-qPCR. Besides, serum inflammatory cytokines (including TNF-α, IL-1β, IL-6 and IL-17) were determined by enzyme-linked immunosorbent assay (ELISA).

Results: LncRNA CRNDE, miR-33a and miR-495 expressions were different, while miR-181a expression was similar among asthmatic exacerbation children, asthmatic controlled children and controls. Moreover, lncRNA CRNDE negatively correlated with miR-33a and miR-495 in asthmatic exacerbation children and asthmatic controlled children, but not in controls. Further analyses showed that lncRNA CRNDE positively correlated with TNF-α, IL-1β, IL-17 and exacerbation severity, while it negatively correlated with FEV₁ /FVC in asthmatic exacerbation children. Meanwhile, miR-33a, miR-181a and miR-495 all negatively correlated with some individual inflammatory cytokines, while only miR-33a negatively correlated with exacerbation severity in asthmatic exacerbation children.

Conclusion: LncRNA CRNDE correlates negatively with miR-33a and miR-495 and positively with inflammatory cytokines in asthmatic children.

Keywords: asthma; exacerbation; inflammation; lncRNA CRNDE; target microRNAs.

FIGURE 1

Expressions of long non‐coding RNA colorectal neoplasia differentially expressed (lncRNA CRNDE), miR‐33a, miR‐181a and miR‐495. Comparison of lncRNA CRNDE (a), miR‐33a (B), miR‐181a (C) and miR‐495 (D) in controls, asthmatic exacerbation children and asthmatic controlled children. LncRNA CRNDE: Long non‐coding RNA colorectal neoplasia differently expressed, miRNA: microRNA

FIGURE 2

Association of Long non‐coding RNA colorectal neoplasia differentially expressed (lncRNA CRNDE) with miR‐33a, miR‐181a and miR‐495. Association of lncRNA CRNDE with miR‐33a (a), miR‐181a (B) and miR‐495 (C) in asthmatic exacerbation children. Association of lncRNA CRNDE with miR‐33a (D), miR‐181a (E) and miR‐495 (F) in asthmatic controlled children. Association of lncRNA CRNDE with miR‐33a (G), miR‐181a (H) and miR‐495 (I) in controls. LncRNA CRNDE: Long non‐coding RNA colorectal neoplasia differently expressed, miRNA: microRNA

FIGURE 3

Association of Long non‐coding RNA colorectal neoplasia differentially expressed (lncRNA CRNDE), miR‐33a, miR‐181a and miR‐495 with exacerbation severity. Association of lncRNA CRNDE (a), miR‐33a (B), miR‐181a (C) and miR‐495 (D) with exacerbation severity. LncRNA CRNDE: Long non‐coding RNA colorectal neoplasia differently expressed, miRNA: microRNA