{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T06:27:17Z","timestamp":1792045637534,"version":"4.4.0"},"reference-count":91,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,6,15]],"date-time":"2023-06-15T00:00:00Z","timestamp":1686787200000},"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>Septic arthritis is the most aggressive joint disease associated with high morbidity and mortality. The interplay of the host immune system with the invading pathogens impacts the pathophysiology of septic arthritis. Early antibiotic treatment is crucial for a better prognosis to save the patients from severe bone damage and later joint dysfunction. To date, there are no specific predictive biomarkers for septic arthritis. Transcriptome sequencing analysis identified <jats:italic>S100a8\/a9<\/jats:italic> genes to be highly expressed in septic arthritis compared to non-septic arthritis at the early course of infection in an <jats:italic>Staphylococcus aureus<\/jats:italic> septic arthritis mouse model. Importantly, downregulation of <jats:italic>S100a8\/a9<\/jats:italic> mRNA expression at the early course of infection was noticed in mice infected with the <jats:italic>S. aureus<\/jats:italic> Sortase A\/B mutant strain totally lacking arthritogenic capacity compared with the mice infected with parental <jats:italic>S. aureus<\/jats:italic> arthritogenic strain. The mice infected intra-articularly with the <jats:italic>S. aureus<\/jats:italic> arthritogenic strain significantly increased <jats:italic>S100a8\/a9<\/jats:italic> protein expression levels in joints over time. Intriguingly, the synthetic bacterial lipopeptide Pam2CSK4 was more potent than Pam3CSK4 in inducing <jats:italic>S100a8\/a9<\/jats:italic> release upon intra-articular injection of these lipopeptides into the mouse knee joints. Such an effect was dependent on the presence of monocytes\/macrophages. In conclusion, <jats:italic>S100a8\/a9<\/jats:italic> gene expression may serve as a potential biomarker to predict septic arthritis, enabling the development of more effective treatment strategies.<\/jats:p>","DOI":"10.3389\/fmicb.2023.1146694","type":"journal-article","created":{"date-parts":[[2023,6,15]],"date-time":"2023-06-15T04:44:56Z","timestamp":1686804296000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":7,"title":["Gene expression of S100a8\/a9 predicts Staphylococcus aureus-induced septic arthritis in mice"],"prefix":"10.3389","volume":"14","author":[{"given":"Meghshree","family":"Deshmukh","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Santhilal","family":"Subhash","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhicheng","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Majd","family":"Mohammad","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders","family":"Jarneborn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rille","family":"Pullerits","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tao","family":"Jin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pradeep Kumar","family":"Kopparapu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2023,6,15]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"2423","DOI":"10.1038\/jid.2010.158","article-title":"The antimicrobial heterodimer S100A8\/S100A9 (calprotectin) is upregulated by bacterial flagellin in human epidermal keratinocytes","volume":"130","author":"Abtin","year":"2010","journal-title":"J. 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