{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T06:33:14Z","timestamp":1790231594553,"version":"4.1.0"},"reference-count":70,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2024,11,25]],"date-time":"2024-11-25T00:00:00Z","timestamp":1732492800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Microbiol."],"abstract":"<jats:p>The lungs of patients with cystic fibrosis (CF) are vulnerable to persistent polymicrobial colonization by bacterial pathogens including <jats:italic>Pseudomonas aeruginosa, Staphylococcus aureus<\/jats:italic>, and the non-tuberculous mycobacterium (NTM) <jats:italic>Mycobacterium abscessus<\/jats:italic>. The polymicrobial milieu within the CF lung impacts individual species fitness, influences biofilm-forming capabilities, pathogenicity, production of virulence factors and even antimicrobial responses, all potentially compromising therapeutic success. Interaction studies among these CF pathogens are very limited, especially studies on the influences of <jats:italic>P. aeruginosa<\/jats:italic> and <jats:italic>S. aureus<\/jats:italic> on <jats:italic>M. abscessus<\/jats:italic> co-existence and virulence. Based on the little known thus far about coinfection of these pathogens, we hypothesize that the co-existence of <jats:italic>P. aeruginosa<\/jats:italic> and <jats:italic>S. aureus<\/jats:italic> alters <jats:italic>M. abscessus<\/jats:italic> virulence and phenotypic characteristics. We evaluated the direct (co-culture) and indirect (using supernatant) effects of <jats:italic>P. aeruginosa<\/jats:italic> and <jats:italic>S. aureus<\/jats:italic> on <jats:italic>M. abscessus<\/jats:italic> growth rate, biofilm formation, macrophage internalization and glycopeptidolipids (GPL) expression. Our observations indicate that <jats:italic>P. aeruginosa<\/jats:italic> and <jats:italic>S. aureus<\/jats:italic> exert a competitive behavior toward <jats:italic>M. abscessus<\/jats:italic> during direct contact or indirect interaction <jats:italic>in-vitro<\/jats:italic>, probably as is the case of polymicrobial infections in the lungs of patients with CF. This is the first report that demonstrates <jats:italic>S. aureus<\/jats:italic> inhibitory effects on <jats:italic>M. abscessus<\/jats:italic> growth and biofilm forming capabilities. Collectively, co-culture studies enhance our understanding of polymicrobial interactions during coinfection and can guide to establish better management of coinfections and treatment strategies for <jats:italic>M. abscessus<\/jats:italic>.<\/jats:p>","DOI":"10.3389\/fmicb.2024.1484510","type":"journal-article","created":{"date-parts":[[2024,11,25]],"date-time":"2024-11-25T17:53:37Z","timestamp":1732557217000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":7,"title":["Polymicrobial interactions influence Mycobacterium abscessus co-existence and biofilm forming capabilities"],"prefix":"10.3389","volume":"15","author":[{"given":"Nishant","family":"Nandanwar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Geoffery","family":"Gu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joy E.","family":"Gibson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael N.","family":"Neely","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2024,11,25]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"445","DOI":"10.4161\/viru.2.5.17724","article-title":"Staphylococcus aureus biofilms: properties, regulation, and roles in human disease","volume":"2","author":"Archer","year":"2011","journal-title":"Virulence"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"1974","DOI":"10.1128\/aem.57.7.1974-1979.1991","article-title":"Bacterial species dominance within a binary culture biofilm","volume":"57","author":"Banks","year":"1991","journal-title":"Appl. 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