DANCR maintained colon epithelial homeostasis by regulating the TNFα/NF-κB pathway

Area of Science:

• Gastroenterology and Molecular Biology
• Immunology and Inflammation

Background:

• Colon epithelial homeostasis is crucial for tissue function and preventing diseases like inflammatory bowel disease.
• Dysregulation of epithelial structure can lead to aberrant immune responses.

Purpose of the Study:

• To investigate the role of long non-coding RNA DANCR in colon epithelial homeostasis.
• To elucidate the molecular mechanisms by which DANCR regulates epithelial barrier function and inflammatory responses.

Main Methods:

• Silencing of DANCR in colon epithelial cells.
• Assessment of epithelial barrier protein expression.
• Analysis of susceptibility to Tumor Necrosis Factor-alpha (TNFα) stimulation.
• Investigation of the Nuclear Factor-kappa B (NF-κB) signaling pathway activation.
• Mechanistic studies involving the protein methyltransferase SET7.

Main Results:

• Silencing DANCR decreased epithelial barrier protein expression.
• DANCR knockdown led to increased susceptibility to TNFα stimulation.
• NF-κB pathway was hyperactivated upon DANCR silencing.
• DANCR was found to modulate SET7 expression and suppress TNFα/NF-κB responses.

Conclusions:

• DANCR acts as a novel regulator of colon epithelial homeostasis.
• DANCR maintains epithelial barrier integrity and controls inflammatory responses via the TNFα/NF-κB axis.
• These findings highlight DANCR as a potential therapeutic target for colon epithelial disorders.