OGG1 inhibitor TH5487 alleviates allergic airway inflammation in mice
Tanner, L.; Bergwik, J.; Bhongir, R. K.; Pan, L.; Dong, C.; Kalderen, C.; Helleday, T.; Boldogh, I.; Adner, M.; Egesten, A.
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Allergic asthma is a complex disease characterized by dyspnea, coughing, chest tightness and airway remodeling, for which there is no cure and is symptomatically treated with inhaled {beta}2-agonist and/or corticosteroids. Molecular mechanisms underlying its complex pathogenesis are not fully understood. However, the 8-oxoguanine DNA glycosylase-1 (OGG1), a DNA repair protein may play a central role, as OGG1 deficiency decreases both innate and allergic inflammatory responses. In this study, administration of TH5487 to mice with OVA-induced allergic airway inflammation significantly decreased goblet cell hyperplasia and mucus production. TH5487 treatment also decreased levels of activated NF-{kappa}B and expression of proinflammatory cytokines resulting in significantly lower recruitment of eosinophils and other immune cells to the lungs. Gene expression profiling of asthma and allergy-related proteins after TH5487 treatment revealed down regulation of Arg1, Mcp1 and Ccl11, and upregulation of the negative regulator of TH2, Bcl6. In addition, the OVA-induced airway hyperresponsiveness was significantly reduced by TH5487 treatment. Taken together, the data presented in this study suggest a clinically relevant utilization of TH5487 for the treatment of allergic inflammation. Graphical abstract O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=139 SRC="FIGDIR/small/492235v1_ufig1.gif" ALT="Figure 1"> View larger version (31K): org.highwire.dtl.DTLVardef@2985cdorg.highwire.dtl.DTLVardef@f642corg.highwire.dtl.DTLVardef@79bb1aorg.highwire.dtl.DTLVardef@1eab483_HPS_FORMAT_FIGEXP M_FIG C_FIG
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