Project description:Pulmonary fibrosis (PF) is a chronic interstitial lung disease that causes irreversible and progressive lung scarring and respiratory failure. Activation of fibroblasts (FBs) play a central role in progression of PF. Here we report that platelet endothelial aggregation receptor 1 (Pear1) in FBs is a new molecular target for PF therapy. Pear1 deficiency spontaneously caused respiratory function decline and alveolar collagens accumulation in old mice. The degree of PF and mortality induced by bleomycin were significantly enhanced in Pear1 deficient mice. FB Mesenchyme-specific Pear1 deficiency aggravated bleomycin-induced PF, confirming that Pear1 modulates PF progression probably byvia regulation of FBs function. Single cell RNA-seq analysis of pulmonary FB and functional enrichment analysis revealed drastic expansion of Aactivated- FB clusters and enrichment of activated FB marker genes in extracellular matrix (ECM) development and pulmonary fibrosis in Pear1-/- fibrotic lungs. CD140+ bulk tissue RNA-seq analysis further confirmed that multiple mesenchyme development pathways especially epithelial mesenchymal transition (EMT) are enriched with up-regulated genes involving FB mediated ECM organization and development in in Pear1-/- fibrotic lungs. We further found that Pear1 associated with Protein Phosphatase 1 to suppress fibrotic factors such as TGFß, FGF or PDGF-induced intracellular signalling and FB activation. Intratracheal aerosolization of monoclonal antibody activating Pear1 greatly ameliorates PF in both wild-type mice and Pear1-humanized mice, suggesting that targeting Pear1 may serve as a new therapeutic strategy for PF.
Project description:Pulmonary fibrosis (PF) is a chronic interstitial lung disease that causes irreversible and progressive lung scarring and respiratory failure. Activation of fibroblasts (FBs) play a central role in progression of PF. Here we report that platelet endothelial aggregation receptor 1 (Pear1) in FBs is a new molecular target for PF therapy. Pear1 deficiency spontaneously caused respiratory function decline and alveolar collagens accumulation in old mice. The degree of PF and mortality induced by bleomycin were significantly enhanced in Pear1 deficient mice. FB Mesenchyme-specific Pear1 deficiency aggravated bleomycin-induced PF, confirming that Pear1 modulates PF progression probably byvia regulation of FBs function. Single cell RNA-seq analysis of pulmonary FB and functional enrichment analysis revealed drastic expansion of Aactivated- FB clusters and enrichment of activated FB marker genes in extracellular matrix (ECM) development and pulmonary fibrosis in Pear1-/- fibrotic lungs. CD140+ bulk tissue RNA-seq analysis further confirmed that multiple mesenchyme development pathways especially epithelial mesenchymal transition (EMT) are enriched with up-regulated genes involving FB mediated ECM organization and development in in Pear1-/- fibrotic lungs. We further found that Pear1 associated with Protein Phosphatase 1 to suppress fibrotic factors such as TGFß, FGF or PDGF-induced intracellular signalling and FB activation. Intratracheal aerosolization of monoclonal antibody activating Pear1 greatly ameliorates PF in both wild-type mice and Pear1-humanized mice, suggesting that targeting Pear1 may serve as a new therapeutic strategy for PFand significantly improves their survival rate.
Project description:We used the scRNA-seq to characterize disease-related heterogeneity within cell populations of macrophages/monocytes in the bronchoalveolar lavage fluid from West Highland white terriers either healthy or affected with canine idioapthic pulmonary fibrosis. The disease is still not well understood, occurs in old West Highland white terriers and results from deposition of fibrotic tissue in the lung parenchyma causing respiratory failure.
Project description:In this study, based on microarray hybridization and the detections of RTqPCR and Western Blotting, we have shown that HeLa cells treated with LHRH receptor monoclonal antibody 4F3B10 increased protein expressions in Fas signaling pathway, which provided a novel route for the gene therapy of HeLa cells.
Project description:We have developed a monoclonal antibody (mAb) C7 that reacts with Als3p and enolase present in Candida albicans cell wall and exerts three anti-Candida activities: candidacidal activity and inhibition of both adhesion and filamentation. To investigate the mode of action of mAb C7 on fungal viability, we examined changes in the genome-wide gene expression profile of C. albicans grown in presence of a subinhibitory concentration of mAb C7 (12.5 µg/ml) by using microarrays. A total of 49 genes were found to be differentially expressed upon treatment with mAb C7. Of these, 28 were found to be up-regulated and 21 down-regulated. The categories of up-regulated genes with the largest number of variations were those involved in iron uptake or related to iron homeostasis (42.86%), while the energy-related group accounted for 38.10% of the down-regulated genes (8/21). Results were validated by real Time PCR. Since these effects resembled those found under iron-limited conditions, the activity of mAb C7 on C. albicans mutants with deletions in key genes implicated in the three iron acquisition systems described in this yeast was also assessed. Only mutants lacking TPK1 and TPK2 genes were less sensitive to the candidacidal effect of mAb C7. FeCl3 or hemin at concentrations ≥ 7.8µM reversed the candidacidal effect of mAb C7 on C. albicans, on a concentration dependent manner. The results presented in this study provide evidence that the candidacidal effect of mAb C7 is related to the blockage of the reductive iron uptake pathway of C. albicans. A saturated culture of C. albicans grown overnight was diluted to an optical density at 600 nm of approximately 0.1 and divided in two aliquots. One of them was used untreated as control and the second one was treated with a subinhibitory concentration (12.5 µg/ml) of monoclonal antibody C7 . Both cultures were incubated for 18 h at 37ºC before harvesting cells. Antibody added and control samples were obtained each time. The experiment was repeated once. Dye-swap technique was used for hybridization and four arrays were analyzed to compare the expresion of over six thousands genes in response to antibody C7.
Project description:RNA Polymerase II ChIP-chip using monoclonal antibody (8WG16) performed on GM06990 cells for Nimblegen ENCODE arrays which comprise 50mer oligonucleotides spaces every 38bps (overlapping by 12nts). Goal was to identify Pol II-binding regions. Use of this data requires permission from its producers. Keywords: ChIP-chip
Project description:RNA Polymerase II ChIP-chip using monoclonal antibody (8WG16) performed on HeLaS3 Cells for Nimblegen ENCODE arrays which comprise 50mer oligonucleotides spaces every 38bps (overlapping by 12nts). Goal was to identify Pol II-binding regions. Use of this data requires permission from its producers. Keywords: ChIP-chip
Project description:The aim of the study was to determine the epitope targeted by 31E10/E7 mouse monoclonal antibody (mAb). mAb 31E10/E7 was diluted at 1:2000 and incubated on a non-commercial Protein Microarray platform printed with NHBA specific recombinant protein fragments and full length NHBA of different variants.
Project description:Previously, we developed a newly monoclonal antibody named NJ001 which selectively reacted to non-small cell lung cancer and exhibited anti-tumor activity both in vitro and in vivo by inhibiting proliferation, colony formation, apoptosis and so on. MiRNA ubiquitously regulates cell processes such as cell cycle regulation, invasion, differentiation and proliferation. We used microarrays to detail the miRNA changes in the lung adenocarcinoma cell SPC-A1 after treatment with NJ001. These miRNA may have contribution to the effect of NJ001 on cancer cells.