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miR-200a-3p improves neonatal necrotizing enterocolitis by regulating RIPK1
Yulu Liu1, Zhansheng Wang1, Hua Huang2
1Department of Neonatal Intensive Care Unit, The First People's Hospital of Shangqiu Shangqiu 476100, Henan Province, China.
American Journal of Translational Research
|December 27, 2021
Summary
MicroRNA-200a-3p protects intestinal cells from necrotizing enterocolitis (NEC) by reducing inflammation and necrosis. This microRNA (miRNA) targets RIPK1, offering a potential therapeutic avenue for NEC treatment.
Area of Science:
- Gastroenterology
- Molecular Biology
- Neonatology
Background:
- Necrotizing enterocolitis (NEC) is a severe acquired intestinal disease primarily affecting premature infants.
- MicroRNAs (miRNAs) are non-coding RNAs implicated in various disease pathologies.
- This study investigates the role of specific miRNAs in the context of NEC.
Purpose of the Study:
- To identify differentially expressed microRNAs in necrotizing enterocolitis (NEC).
- To elucidate the functional role and mechanism of miR-200a-3p in intestinal epithelial cells under NEC-related stress.
- To explore miR-200a-3p as a potential therapeutic target for NEC.
Main Methods:
- Differential expression analysis of miRNAs using GEO dataset GSE68054.
- Quantitative real-time PCR (qRT-PCR) to measure miR-200a-3p levels in lipopolysaccharide (LPS)-induced IEC-6 cells and NEC patient serum.
- In vitro assays (CCK-8, PI staining, cytokine detection) to assess cell viability, death, and inflammation.
- Bioinformatic prediction (TargetScanHuman) and luciferase reporter assays to identify miR-200a-3p targets.
- Western blot analysis to investigate molecular mechanisms, including RIPK1 interactions.
Main Results:
- miR-200a-3p expression was significantly decreased in LPS-treated IEC-6 cells and NEC contexts.
- miR-200a-3p mimics inhibited LPS-induced inflammation (IL-6, TNF-α) and cell death (PI positive rate) in IEC-6 cells.
- Receptor-interacting protein kinase 1 (RIPK1) was identified as a direct downstream target of miR-200a-3p.
- Overexpression of RIPK1 exacerbated LPS-induced cell injury, while miR-200a-3p mimics alleviated RIPK1 levels and inhibited RIPK1-RIPK3 interactions, reducing necrosis.
Conclusions:
- miR-200a-3p confers protection to intestinal epithelial cells against LPS-induced injury.
- This protection is achieved by suppressing inflammation and necrosis pathways mediated by RIPK1.
- miR-200a-3p represents a promising therapeutic target for necrotizing enterocolitis.
