Abstract:
:Peritoneal dialysis (PD) is often used to treat patients with end stage renal disease, and its long-term complications include excessive inflammation and oxidative stress. Allograft inflammatory factor 1 (AIF-1), as a cytoplasmic protein, is originally identified from infiltrating macrophages, and it was associated with inflammation in the cells other than macrophages, such as endothelial cells and vascular smooth muscle cells. To clarify the molecular mechanisms of AIF-1-modulated pathological changes in the peritoneum during PD, we first detected the AIF-1 expression in peritoneal tissues from PD mice. Results revealed that the pro-fibrotic stimulation caused AIF-1 upregulation and triggered inflammation in peritoneal tissues, and that AIF-1 co-expressed with pan-cytokeratin (a marker of peritoneal mesothelial cells). We next treated primary mouse peritoneal mesothelial cells (pan-cytokeratin and intercellular adhesion molecule 1 positive cells) with 50 or 100 ng/mL recombinant AIF-1, and evaluated the direct effects of AIF-1 on these cells in vitro. We found that exogenous AIF-1 treatment induced inflammation and oxidative stress in mesothelial cells. Apart from the augmented IL-6 and TNF-α secretion, the level of ROS was upregulated and the activity of anti-oxidative SOD was reduced in cells exposed to AIF-1. Moreover, AIF-1 simulation triggered the activation of NF-κB pathway-enhanced the conversion of IκB to phosphorylated IκB and promoted the translocation of NF-κB p65 from cytoplasm into nucleus. Additionally, AIF-1-evoked inflammation in peritoneal mesothelial cells was attenuated by the addition of NF-κB inhibitor (BAY 11-7082). In brief, this study provides us novel information to understand the molecular regulation mechanisms of AIF-1 in peritoneal fibrosis.
journal_name
Cell Biol Intjournal_title
Cell biology internationalauthors
Zhou Y,Li X,Yuan X,Hao Ldoi
10.1002/cbin.11115subject
Has Abstractpub_date
2019-05-01 00:00:00pages
495-505issue
5eissn
1065-6995issn
1095-8355journal_volume
43pub_type
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