LncRNA NEAT1 activates MyD88/NF-κB pathway in bronchopneumonia through targeting miR-155-5p

Area of Science:

• Molecular Biology
• Immunology
• Respiratory Medicine

Background:

• Bronchopneumonia is a significant respiratory illness with potential complications.
• Long non-coding RNAs (lncRNAs) are implicated in bronchopneumonia pathogenesis.
• The specific role of Nuclear paraspeckle assembly transcript 1 (NEAT1) in bronchopneumonia was previously unclear.

Purpose of the Study:

• To investigate the function of NEAT1 in bronchopneumonia.
• To elucidate the molecular mechanisms underlying NEAT1's role in this disease.

Main Methods:

• Gene and protein expression analyzed via RT-qPCR and Western blotting.
• Cell viability assessed using MTT assays; apoptosis detected by flow cytometry.
• RNA immunoprecipitation (RIP) and dual-luciferase reporter assays used to confirm molecular interactions.

Main Results:

• NEAT1 and MyD88 were upregulated, while miR-155-5p was downregulated in lipopolysaccharide (LPS)-induced BEAS-2B cells.
• NEAT1 knockdown inhibited cell proliferation, apoptosis, and inflammatory responses (TNF-α, IL-1β, IL-6, IL-18).
• NEAT1 directly targets miR-155-5p, regulating the MyD88/NF-κB axis; miR-155-5p overexpression reversed NEAT1 knockdown effects.

Conclusions:

• NEAT1 silencing ameliorates LPS-induced injury and inflammation in BEAS-2B cells via the miR-155-5p/MyD88/NF-κB pathway.
• This research provides insights into potential novel therapeutic strategies for bronchopneumonia treatment.