Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 64, Issue 11, Pages -Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.01210-20
Keywords
CARD9; Pneumocystis carinii; inflammation; inhibitor; macrophages
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Funding
- NHLBI NIH HHS [R01 HL062150] Funding Source: Medline
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Pneumocystis jirovecii, the opportunistic fungus that causes Pneumocystis pneumonia (PCP) in humans, is a significant contributor to morbidity and mortality in immunocompromised patients. Given the profound deleterious inflammatory effects of the major beta-glucan cell wall carbohydrate constituents of Pneumocystis through Dectin-1 engagement and downstream caspase recruitment domain-containing protein 9 (CARD9) immune activation, we sought to determine whether the pharmacodynamic activity of the known CARD9 inhibitor BRD5529 might have a therapeutic effect on macrophage innate immune signaling and subsequent downstream anti-inflammatory activity. The small-molecule inhibitor BRD5529 was able to significantly reduce both phospho-p38 and phospho-pERK1 signaling and tumor necrosis factor alpha (TNF-alpha) release during stimulation of macrophages with Pneumocystis cell wall beta-glucans.
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