Abstract:
:Pseudomonas aeruginosa is an important opportunistic bacterial pathogen. Despite its metabolic and virulence versatility, it has not been shown to infect articular joints, which are areas that are rarely infected with bacteria in general. We hypothesized that articular joints possess antimicrobial activity that limits bacterial survival in these environments. We report that cartilages secrete a novel antimicrobial factor, henceforth referred to as the cartilage-associated antimicrobial factor (CA-AMF), with potent antimicrobial activity. Importantly, CA-AMF exhibited significantly more antimicrobial activity against P. aeruginosa strains with a functional type III secretion system (T3SS). We propose that CA-AMF represents a new class of human antimicrobial factors in innate immunity, one which has evolved to selectively target pathogenic bacteria among the beneficial and commensal microflora. The T3SS is the first example, to the best of our knowledge, of a pathogen-specific molecular target in this antimicrobial defence system.
journal_name
J Med Microbioljournal_title
Journal of medical microbiologyauthors
Mahmood F,Hakimiyan A,Jayaraman V,Wood S,Sivaramakrishnan G,Rehman T,Reuhs BL,Chubinskaya S,Shafikhani SHdoi
10.1099/jmm.0.051227-0subject
Has Abstractpub_date
2013-04-01 00:00:00pages
531-539issue
Pt 4eissn
0022-2615issn
1473-5644journal_volume
62pub_type
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