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Empiric antimicrobial therapy should be narrowed once pathogen identification and sensitivities are established. However, the detailed mechanisms of de-escalation strategy are still unclear. Here we hypothesized neutrophil extracellular traps (NETs) played an essential role and de-escalation strategy might alleviate organs injury through regulation of NETs formation in sepsis. We evaluated the effect of imipenem and ceftriaxone on NETs formation in vitro and examined the role of reactive oxygen species (ROS). Next, we designed de-escalation and escalation strategy in cecum ligation and puncture (CLP) models. Organ injury, inflammatory cytokines, NETs levels were compared and evaluated. In CLP models, de-escalation therapy resulted in an increased serum MPO-DNA level during the early stage and decreased MPO-DNA level during late stage, which exerted the reverse effects in escalation therapy. Inflammatory response and organ injury exacerbated when eliminated NETs with DNAse I during the early stage of sepsis (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.01). Histopathological analysis showed decreased injury in lung, liver, and intestine in de-escalation therapy compared with escalation therapy (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.01). De-escalation therapy results in the highest 6-day survival rate compared with the control group (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.01), however, no significant difference was found between de-escalation and escalation group (<jats:italic>p<\/jats:italic>\u2009=\u20090.051). The in vitro study showed that the imipenem could promote, while the ceftriaxone could inhibit the formation of NETs in PMA-activated PMNs through a ROS-dependent manner. We firstly demonstrate that de-escalation, not escalation, therapy reduces organ injury, decreases inflammatory response by promoting NETs formation in the early stage, and inhibiting NETs formation in the late stage of sepsis.<\/jats:p>","DOI":"10.1038\/s41420-021-00745-0","type":"journal-article","created":{"date-parts":[[2021,11,10]],"date-time":"2021-11-10T12:12:12Z","timestamp":1636546332000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["De-escalation antibiotic therapy alleviates organ injury through modulation of NETs formation during sepsis"],"prefix":"10.1038","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1292-5118","authenticated-orcid":false,"given":"Zehua","family":"Duan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tian","family":"Xie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9986-3508","authenticated-orcid":false,"given":"Chengnan","family":"Chu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fang","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyu","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jieshou","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5026-689X","authenticated-orcid":false,"given":"Weiwei","family":"Ding","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,11,10]]},"reference":[{"key":"745_CR1","doi-asserted-by":"crossref","unstructured":"Disease GBD, Injury I, Prevalence C. 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The present study was approved by the Institutional Review Board (Ethics committee of Jinling Hospital, Nanjing, China. No. 2019-NJGKJ-047).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical statement"}}],"article-number":"345"}}