What question did this study set out to answer?

The research aims to understand how STEAP4 affects intestinal barrier dysfunction and inflammatory processes in ulcerative colitis.

March 28, 2026

STEAP4 Modulates Intestinal Barrier Dysfunction and Inflammatory Signaling Pathways in Ulcerative Colitis

Key Points

The research aims to understand how STEAP4 affects intestinal barrier dysfunction and inflammatory processes in ulcerative colitis.
Analyzed clinical samples from inflammatory bowel disease (IBD) patients.
Used a DSS-induced murine colitis model to assess intestinal inflammation.
Conducted experiments on LPS-treated intestinal epithelial cells (NCM460 and HT-29).
Performed H&E staining and Western blot analyses to validate model efficacy.
Applied siRNA to induce STEAP4 knockdown and assessed its effects on tight junctions and inflammatory markers.
STEAP4 expression was significantly increased in inflamed mucosa across multiple models.
STEAP4 knockdown increased claudin-1 expression and TEER values, indicating improved barrier function.
Knockdown also reduced FITC-D permeability and pro-inflammatory cytokines such as TNF-α and IL-6.
Inhibition of STEAP4 led to decreased phosphorylation of NF-κB signaling components.

Abstract

Ulcerative colitis (UC) is characterized by intestinal barrier dysfunction and chronic inflammation, yet its underlying mechanisms remain incompletely understood. This study investigates the role of Six-transmembrane epithelial antigen of the prostate 4 (STEAP4), a metalloreductase linked to redox regulation, in UC pathogenesis. Using clinical samples from IBD patients, a dextran sulfate sodium (DSS)-induced murine colitis model, and lipopolysaccharide (LPS)-treated intestinal epithelial cells (NCM460 and HT-29), we demonstrated that STEAP4 expression was significantly upregulated in inflamed mucosa across human, murine, and in vitro models. H n=3), increased TEER value (p < 0.001; n=3), decreased the permeability of FITC‐D (p < 0.01, p < 0.001; n=3) and suppressed LPS-induced pro-inflammatory cytokines (TNF-α, IL-6) (p < 0.05; n=3) by attenuating NF-κB phosphorylation (p65, IκBα) (p < 0.05, p < 0.01, p < 0.001; n=3). These findings position STEAP4 as a critical regulator of mucosal inflammation, bridging redox homeostasis, epithelial barrier function, and NF-κB-driven immune responses. Our study highlights STEAP4 as a potential therapeutic target for restoring intestinal homeostasis in UC, warranting further exploration of its molecular interactions and translational applications.

Bookmark

Cite This Study

Xu et al. (Mon,) studied this question.

synapsesocial.com/papers/69c771838bbfbc51511e168e https://doi.org/https://doi.org/10.1097/shk.0000000000002837

Bookmark