articleJournal of Inflammation ResearchJun 1, 2025GOLD OA

N4BP3 Activates TLR4-NF-κB Pathway in Inflammatory Bowel Disease by Promoting K48-Linked IκBα Ubiquitination

Central South University · Changsha Medical University · +2 more institutions

PubMed
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Abstract

Methods

Lipopolysaccharides (LPS) were used to activate the TLR4 pathway in THP-1/Caco-2 cells. THP-1/Caco-2 cells were transfected with either N4BP3 overexpression or knockdown plasmids, generating N4BP3-overexpressing or N4BP3-deficient cell lines. For in vivo studies, colitis was induced in mice using dextran sodium sulfate (DSS). Additionally, negative control and N4BP3-knockdown C57BL/6 mouse models were established via intraperitoneal injection of control or N4BP3-targeting adeno-associated virus (AAV).

Results

LPS stimulation significantly upregulated N4BP3 expression in THP-1/Caco-2 cells compared to sterile water treatment (P

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