The miR-146a-associated HDAC2 regulation of PI3K is involved in pancreatitis in vitro

Area of Science:

• Molecular Biology
• Cell Biology
• Gastroenterology

Background:

• Pancreatitis is a significant inflammatory condition with limited therapeutic options.
• MicroRNAs (miRNAs) play crucial roles in regulating gene expression and cellular processes.
• The PI3K signaling pathway is implicated in various cellular functions, including proliferation and inflammation.

Purpose of the Study:

• To investigate the association between microRNA-146a (miR-146a) and HDAC2.
• To elucidate their regulatory roles on PI3K expression in pancreatitis.
• To explore potential therapeutic strategies targeting the miR-146a/HDAC2 axis.

Main Methods:

• An in vitro pancreatitis model was established using rat pancreatic AR42J cells treated with lipopolysaccharide (LPS).
• Cell proliferation and apoptosis were assessed using CCK-8 and flow cytometry.
• Expression levels of inflammatory factors (IL-6, TNF-α) and miR-146a were quantified.
• HDAC2 and PI3K co-localization was examined via immunofluorescence.
• A dual-luciferase assay confirmed the targeting relationship between miR-146a and HDAC2.

Main Results:

• Pancreatitis induction decreased cell proliferation and increased IL-6 and TNF-α levels.
• TSA (HDAC inhibitor) and miR-146a mimic interventions restored cell proliferation.
• These interventions also reduced the elevated levels of IL-6 and TNF-α.
• Dual-luciferase and immunofluorescence assays confirmed the interaction between miR-146a, HDAC2, and PI3K.

Conclusions:

• TSA and miR-146a mimic demonstrate therapeutic potential by enhancing proliferation and reducing inflammation in pancreatitis.
• The miR-146a/HDAC2 axis is identified as a key regulator of PI3K expression in pancreatitis.
• Modulating the miR-146a/HDAC2 axis offers a promising therapeutic strategy for pancreatitis.