Journal: bioRxiv
Article Title: STING contributes to pulmonary hypertension by targeting the interferon and BMPR2 signaling through targeting F2RL3
doi: 10.1101/2024.02.20.578386
Figure Lengend Snippet: A and B , Downregulated Gene ontology (GO) terms and KEGG pathways analysis from the bulk RNA-sequencing (RNA-seq) in PAECs with STING silencing and followed by TNF-α (2ng/ml) treatment for 24 hours. C , Heatmap showing dysregulated gene expression and highlighting the F2RL3 in Complement and coagulation cascades. D , Volcano plot showing the differentially expressed genes in PAECs and highlights the F2RL3. E , Relative mRNA expression of STING and F2RL3 in PAECs treated with siSTING versus siNC (siNegative Control) (n=3). F , The protein levels of F2RL3 and STING in PAECs with siRNA STING transfection (n=3). G, The protein levels of phosphorylation of NF-κB p65 in PAECs treated with siSTING versus siNC±TNF-α (2ng/ml) treatment for 24 h (n=3). H, Schematic illustration shows the potential NF-κB binding sites of the F2RL3 promoter region, and agarose gel electrophoresis to assess the PCR reactions from the ChIP samples. I, Dual luciferase assay showing the transcriptional regulation of NF-κB on F2RL3 WT and mutants in 293T cells. J, Co-immunoprecipitation (Co-IP) in PAECs to assess the interaction between STING and F2RL3. K, Relative mRNA expression of F2RL3 in lung tissues from PH patients and healthy controls (n=5-12). L, Representative colocalization staining of F2RL3 (red), vWF (red) and α-SMA (green) in pulmonary arteries of healthy controls and PH patients (n=4), Scale bar=20μm. M, The protein levels of p-STING/STING and p-TBK1/TBK1 in PAECs treated with siF2RL3 versus siNC±TNF-α (2ng/ml) treatment for 24 h (n=3). Data are presented as mean ± SEM. * P <0.05, ** P <0.01, *** P <0.01. Statistical analysis was done using unpaired two-tailed t test for E,F,and K. Statistical analysis was done using a two-way ANOVA with multiple comparisons for G,I, and M.
Article Snippet: Human pulmonary artery endothelial cells (PAECs) were purchased from Promcell (C-12241).
Techniques: RNA Sequencing, Gene Expression, Coagulation, Expressing, Control, Transfection, Phospho-proteomics, Binding Assay, Agarose Gel Electrophoresis, Luciferase, Immunoprecipitation, Co-Immunoprecipitation Assay, Staining, Two Tailed Test