miRNA-21 plays an important role in necrotizing enterocolitis

Area of Science:

• Gastroenterology
• Molecular Biology
• Pediatrics

Background:

• Necrotizing enterocolitis (NEC) is a severe gastrointestinal disease affecting newborns.
• The precise molecular mechanisms underlying NEC pathogenesis require further elucidation.

Purpose of the Study:

• To investigate the role and mechanism of microRNA-21 (miRNA-21) in necrotizing enterocolitis (NEC).
• To evaluate miRNA-21 as a potential diagnostic marker and therapeutic target for NEC.

Main Methods:

• Serum miRNA-21 expression was measured in 30 pairs of newborns with and without NEC.
• A rat model of NEC was established, and animals were treated with either normal saline or miRNA-21.
• Histological analysis, cell apoptosis assays, and Western blot analysis were performed on intestinal tissues.

Main Results:

• miRNA-21 expression was significantly upregulated in NEC patients compared to healthy newborns.
• The NEC rat model exhibited significant intestinal pathology and increased cell apoptosis.
• miRNA-21 overexpression in the rat model ameliorated intestinal damage, reduced cell apoptosis, and modulated key protein expressions (PTEN, PI3K, AKT, GSK-3β).

Conclusions:

• miRNA-21 is significantly upregulated in NEC, indicating its potential as a biomarker.
• miRNA-21 demonstrates therapeutic potential for NEC by improving intestinal tissue integrity and reducing apoptosis.