{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,22]],"date-time":"2026-04-22T22:23:57Z","timestamp":1776896637158,"version":"3.51.2"},"reference-count":49,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2012,11,7]],"date-time":"2012-11-07T00:00:00Z","timestamp":1352246400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Scand J Immunol"],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:italic>Yersinia pestis<\/jats:italic>, the causative agent of plague, is proved to be a recently emerged clone from <jats:italic>Y.\u00a0pseudotuberculosis<\/jats:italic>. However, the diseases they cause and their patterns of transmission are very different. People always focus on the genetic changes between <jats:italic>Y.\u00a0pestis<\/jats:italic> and <jats:italic>Y.\u00a0pseudotuberculosis<\/jats:italic> to reveal their pathogenic differences, and little is known about host defence differences to these two <jats:italic>Yersinia<\/jats:italic>. In this study, the effects of <jats:italic>Y.\u00a0pestis<\/jats:italic> and <jats:italic>Y. pseudotuberculosis<\/jats:italic> on macrophages were analysed. Cell apoptosis showed significant difference after the macrophages were infected by these two strains, and caspase\u20103 activity also demonstrated a similar tendency. Further, macrophage function activities were evaluated. We found during the early infection of <jats:italic>Y.\u00a0pestis<\/jats:italic>, several basic functions of macrophages, including phagocytosis, secretion of cytokine tumour necrosis factor\u2010\u03b1 and nitric oxide, macrophage polarity and antigen presenting, were significantly interrupted. In comparison, <jats:italic>Y.\u00a0pseudotuberculosis<\/jats:italic> infection showed lower inhibition on macrophages. Especially, <jats:italic>Y.\u00a0pestis<\/jats:italic> infection might cause macrophage to polarize to M2 macrophages in the early phase, compared with <jats:italic>Y.\u00a0pseudotuberculosis<\/jats:italic> infection, which was different from the common acute infection. These results clearly indicated even in the early stage of infection, different host macrophage defence patterns could help us to understand the obvious virulence differences between <jats:italic>Y.\u00a0pestis<\/jats:italic> and <jats:italic>Y.\u00a0pseudotuberculosis<\/jats:italic>.<\/jats:p>","DOI":"10.1111\/j.1365-3083.2012.02767.x","type":"journal-article","created":{"date-parts":[[2012,8,7]],"date-time":"2012-08-07T16:38:03Z","timestamp":1344357483000},"page":"541-551","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["<i>Yersinia pestis<\/i> Versus <i>Yersinia pseudotuberculosis<\/i>: Effects on Host 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