ArticleExperimental and therapeutic medicine2023
iRHOM2 regulates inflammation and endothelial barrier permeability via CX3CL1.
Article in Experimental and therapeutic medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors at 2 institutions in 1 country.
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Abstract
Acute lung injury (ALI) is associated with increased lung inflammation and lung permeability. The present study aimed to determine the role of inactive rhomboid-like protein 2 (iRHOM2) in ALI in lipopolysaccharide (LPS)-induced pulmonary microvascular endothelial cell model. Human pulmonary microvascular endothelial cells (HPMVECs) were transfected with small interfering RNA targeting iRHOM2 and C-X3-C motif chemokine ligand 1 (CX3CL1) overexpression plasmids and treated with LPS. Cell viability was detected using a Cell Counting Kit-8 assay, while levels of TNFα, IL-1β, IL-6 and p65 were measured by reverse transcription-quantitative PCR and western blotting. Apoptosis levels were measured using a TUNEL assay. Endothelial barrier permeability was detected, followed by analysis of zonula occludens-1, vascular endothelial-cadherin and occludin by immunofluorescence staining or western blotting. The interaction of iRHOM2 and CX3CL1 was analyzed using an immune-coprecipitation assay. Through bioinformatics analysis, it was found that CX3CL1 was upregulated in the LPS group compared with the control. Kyoto Encyclopedia of Genes and Genomes pathway analysis demonstrated that the TNF signaling pathway affected by iRHOM2 and cytokine-cytokine receptor interaction, including CX3CL1, served a key role in ALI. HPMVECs treated with LPS exhibited a decrease in cell viability and an increase in inflammation, apoptosis and endothelial barrier permeability, while these effects were reversed by iRHOM2 silencing. However, CX3CL1 overexpression inhibited the effects of iRHOM2 silencing on LPS-treated HPMVECs. The present study demonstrated a novel role of iRHOM2 as a regulator that affects inflammation, apoptosis and endothelial barrier permeability; this was associated with CX3CL1.
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