{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,24]],"date-time":"2026-10-24T02:28:28Z","timestamp":1792808908983,"version":"4.5.0"},"reference-count":57,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2024,9,26]],"date-time":"2024-09-26T00:00:00Z","timestamp":1727308800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0"}],"funder":[{"DOI":"10.13039\/501100001809","name":"The National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["81960109"],"award-info":[{"award-number":["81960109"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"name":"The Joint Special Funds for the Department of Science and Technology of Yunnan Province-Kunming Medical University","award":["202001AY070001-205"],"award-info":[{"award-number":["202001AY070001-205"]}],"id":[{"id":"https:\/\/ror.org\/04qgr7x96","id-type":"ROR","asserted-by":"crossref"}]},{"name":"The Clinical Research Center for Geriatric Diseases of Yunnan Province - Diagnosis and Treatment of Geriatric Comorbidity and Clinical Translational Research","award":["202102AA310069"],"award-info":[{"award-number":["202102AA310069"]}]},{"name":"The Yunnan Clinical Center for Emergency Traumatic Disease and the Innovative Team of Yunnan Province","award":["202305AS350019"],"award-info":[{"award-number":["202305AS350019"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>The severity of acute gastrointestinal injury (AGI) is a critical determinant of survival in sepsis. However, there is no specifically interventional management for gastrointestinal dysfunction. Toll-like Receptor 4 (TLR4) is an important contributor to sepsis-induced multiple organ dysfunction syndrome. So, we investigated the effect of TLR4 on leucine-rich repeat-containing G protein-coupled receptor 5 (Lgr5) + cells and goblet cells and its potential mechanism.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A cecal ligation and puncture (CLP) model reflecting the development of clinical sepsis was developed. Tak-242, a TLR4 inhibitor, was administered to septic rats at a dose of 3 mg\/kg via intraperitoneal injection. Immunohistochemistry was performed to detect TLR4 and Lgr5+ cells. AB-PAS staining was performed to detect goblet cells. MUC1 and MUC2 secreted by goblet cells, biomarkers of endoplasmic reticulum (ER) stress and inflammatory cytokines in the intestine were detected by western blotting and real-time PCR.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>We found that the upregulation of the TLR4\/NF-\u03baB signaling pathway activated intestinal inflammatory response in sepsis. Meanwhile, the structure of intestinal mucosa was destroyed, Lgr5+ cells and goblet cells count were significantly reduced, and the secretory function of goblet cells also decreased. Further studies have found that TLR4 increased the levels of activating transcription factor-6 (ATF6), XBP1, ER chaperone (Bip) and CHOP, but did not activate the protein kinase RNA (PKR)-like ER kinase (P-PERK).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>We concluded that the inhibition of TLR4\/NF-\u03baB signaling pathway can reduce intestinal inflammatory response, protect intestinal mucosa, protect Lgr5+ cells, goblet cells and relieve ER stress. Our findings suggest that Tak-242 protects Lgr5+ cells and goblet cells after sepsis, partly may be through the suppression of ER stress. Thus, inhibition of TLR4-mediated ER stress may be a promising therapy of septic AGI.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.7717\/peerj.18185","type":"journal-article","created":{"date-parts":[[2024,9,26]],"date-time":"2024-09-26T03:12:42Z","timestamp":1727320362000},"page":"e18185","source":"Crossref","is-referenced-by-count":7,"title":["Toll-like receptor 4 damages the intestinal epithelial cells by activating endoplasmic reticulum stress in septic rats"],"prefix":"10.7717","volume":"12","author":[{"given":"Xue","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming,  Yunnan, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jilin","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Critical Care Medicine, First Affiliated Hospital of Kunming Medical University, Kunming,  Yunnan, 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