{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"institution":[{"name":"bioRxiv"}],"indexed":{"date-parts":[[2026,6,24]],"date-time":"2026-06-24T05:55:26Z","timestamp":1782280526465,"version":"3.54.5"},"posted":{"date-parts":[[2024,11,26]]},"group-title":"Immunology","reference-count":78,"publisher":"openRxiv","license":[{"start":{"date-parts":[[2024,11,26]],"date-time":"2024-11-26T00:00:00Z","timestamp":1732579200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.biorxiv.org\/about\/FAQ#license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"accepted":{"date-parts":[[2024,11,25]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                <jats:p>\n                  <jats:italic>Pseudomonas aeruginosa (P.a.)<\/jats:italic>\n                  is a gram-negative, opportunistic bacterium abundantly present in the environment. Often\n                  <jats:italic>P.a.<\/jats:italic>\n                  infections cause severe pneumonia, if left untreated. Surprisingly, up to 30% of patients admitted to the hospital for community- acquired pneumonia develop adverse cardiovascular complications such as myocardial infarction, arrhythmia, left ventricular dysfunction, and heart failure. However, the underlying mechanism of infection-mediated cardiac dysfunction is not yet known. Recently, we demonstrated that\n                  <jats:italic>P.a.<\/jats:italic>\n                  infection of the lungs led to severe cardiac electrical abnormalities and left ventricular dysfunction with limited\n                  <jats:italic>P.a.<\/jats:italic>\n                  dissemination to the heart tissue. To understand the mechanism of cardiac dysfunction during\n                  <jats:italic>P.a.<\/jats:italic>\n                  infection, we utilized both\n                  <jats:italic>in vitro<\/jats:italic>\n                  and\n                  <jats:italic>in vivo<\/jats:italic>\n                  models. Our results revealed that inflammatory cytokines contribute but are not solely responsible for severe contractile dysfunction in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). Instead, exposure of hiPSC-CMs with conditioned media from\n                  <jats:italic>P.a.<\/jats:italic>\n                  infected human monocyte-derived macrophages (hMDMs) was sufficient to cause severe contractile dysfunction and arrhythmia in hiPSC-CMs. Specifically, exosomes released from infected hMDMs and bacterial outer membrane vesicles (OMVs) are the major drivers of cardiomyocyte contractile dysfunction. By using LC-MS\/MS, we identified bacterial proteins, including toxins that are packaged in the exosomes and OMVs, which are responsible for contractile dysfunction. Furthermore, we demonstrated that systemic delivery of bacterial OMVs to mice caused severe cardiac dysfunction, mimicking the natural bacterial infection. In summary, we conclude that OMVs released during infection enter circulation and drive cardiac dysfunction.\n                <\/jats:p>","DOI":"10.1101\/2024.11.22.624948","type":"posted-content","created":{"date-parts":[[2024,11,26]],"date-time":"2024-11-26T11:41:02Z","timestamp":1732621262000},"source":"Crossref","is-referenced-by-count":1,"title":["<i>Pseudomonas aeruginosa-<\/i>\n                  mediated cardiac dysfunction is driven by extracellular vesicles released during infection"],"prefix":"10.64898","author":[{"given":"Naresh","family":"Kumar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sameer Salam","family":"Mattoo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shridhar","family":"Sanghvi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maneeth P.","family":"Ellendula","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sahil","family":"Mahajan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clara","family":"Planner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3576-4388","authenticated-orcid":false,"given":"Joseph S.","family":"Bednash","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahmood","family":"Khan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Latha P.","family":"Ganesan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6135-1897","authenticated-orcid":false,"given":"Harpreet","family":"Singh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William P.","family":"Lafuse","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel J.","family":"Wozniak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Murugesan V.S.","family":"Rajaram","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"54368","reference":[{"key":"2024112722570009000_2024.11.22.624948v1.1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jgar.2021.02.016"},{"key":"2024112722570009000_2024.11.22.624948v1.2","doi-asserted-by":"publisher","DOI":"10.1097\/MRM.0000000000000271"},{"key":"2024112722570009000_2024.11.22.624948v1.3","first-page":"1","article-title":"Impact of Pseudomonas aeruginosa Infection on Patients with Chronic Inflammatory Airway Diseases","volume":"9","year":"2020","journal-title":"J. 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