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Published on: September 4, 2012
miR-424-5p overexpression inhibits LPS-stimulated inflammatory response in bovine endometrial epithelial cells by
Talha Umar1, Xiaofei Ma1, Baoyi Yin1
1Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China.
Abstract:
Endometritis is inflammation of endometrium due to various factors and is a common cause of infertility. Several remedies used for endometritis like antibiotics, hormones, and herbs. Studies confirm that microRNAs play a significant role in various inflammatory diseases. However, the role of miR-424-5p in endometritis is not clear. In our study, histopathology, real-time quantitative polymerase chain reaction, Western blot analysis, immunofluorescence, ELISA, and dual-luciferase reporter assay were used to elucidate the effect of miR-424-5p in lipopolysaccharide (LPS)-primed inflammatory response in bovine endometrial epithelial cells (BEECs) and clarify the potential mechanism. Our results revealed that miR-424-5p mimics noticeably decrease the production of proinflammatory cytokines (IL-1β, IL-6, and TNF-α), while miR-424-5p inhibitors have inverse effects in BEECs. Moreover, overexpression of miR-424-5p on BEECs cells also suppressed NF-κB p65 activation. Afterwards, we verified that miR-424-5p inhibited Interleukin 1 Receptor Associated Kinase 2 (IRAK2) expression by binding to the 3'-UTR of IRAK2 mRNA. Further, co-transfection of miR-424-5p inhibitors and siRNA-IRAK2 revealed that negative regulation of miR-424-5p on LPS-induced inflammatory response in BEECs was mediated by IRAK2.Mutually, miR-424-5p pharmacologic stabilization represents an entirely unique medical aid for cow endometritis and other inflammation-related diseases.
Insights
MicroRNA miR-424-5p reduces inflammation in bovine endometritis by targeting IRAK2. This finding offers a novel therapeutic strategy for inflammatory diseases, including cow endometritis.
Area of Science:
- Veterinary Medicine
- Molecular Biology
- Reproductive Immunology
Background:
- Endometritis, a common cause of infertility, involves endometrial inflammation.
- MicroRNAs are implicated in inflammatory diseases, but miR-424-5p's role in endometritis is unknown.
Purpose of the Study:
- To investigate the effect of miR-424-5p on lipopolysaccharide (LPS)-induced inflammation in bovine endometrial epithelial cells (BEECs).
- To elucidate the underlying mechanism of miR-424-5p in regulating inflammatory responses.
Main Methods:
- Histopathology, real-time quantitative PCR, Western blot, immunofluorescence, ELISA, and dual-luciferase reporter assay were employed.
- Experiments involved miR-424-5p mimics, inhibitors, and siRNA targeting IRAK2 in BEECs.
Main Results:
- miR-424-5p mimics decreased proinflammatory cytokines (IL-1β, IL-6, TNF-α) and suppressed NF-κB p65 activation.
- miR-424-5p directly targeted and inhibited Interleukin 1 Receptor Associated Kinase 2 (IRAK2) expression.
- The anti-inflammatory effect of miR-424-5p in LPS-induced endometritis was mediated by IRAK2.
Conclusions:
- miR-424-5p plays a crucial role in suppressing inflammatory responses in bovine endometritis.
- Pharmacologic stabilization of miR-424-5p presents a potential therapeutic approach for cow endometritis and related inflammatory conditions.
