{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T18:51:15Z","timestamp":1791571875709,"version":"4.3.4"},"reference-count":54,"publisher":"American Association for the Advancement of Science (AAAS)","issue":"41","funder":[{"name":"the Regional Innovation and Development Joint Fund of the National Natural Science Foundation","award":["U22A20356"],"award-info":[{"award-number":["U22A20356"]}]}],"content-domain":{"domain":["www.science.org"],"crossmark-restriction":true},"short-container-title":["Sci. Adv."],"published-print":{"date-parts":[[2026,10,9]]},"abstract":"<jats:p>As an important component of biomimetic drug delivery systems, cell membrane\u2013coated nanoparticles are widely used for subcellular delivery. However, the influence of cell membranes at different life cycles on subcellular delivery remains unexplored. Our previous study demonstrated that senescent tumor cell membrane\u2013coated nanoparticles (SNP) displayed superior endoplasmic reticulum (ER) targeting efficiency in tumor cells. After inducing tumor cells into senescence, SNP showed greater accumulation in ER. Herein, we design a \u201ctime engine\u201d nanosystem for amplified ER targeting: Firstly, ribociclib is encapsulated into SNP (R@SNP) to induce tumor cell senescence; then, SNP loaded with brefeldin A (B@SNP) is used to trigger ER stress. By sequential therapy, R@SNP disrupts the cytoskeleton of 4T1 tumor cells to eliminate ER-targeting barriers and remodels the tumor immune microenvironment; B@SNP boosts ER-targeting efficiency and triggers intense ER stress. Collectively, such time engine nanosystem achieves excellent ER accumulation and antimetastatic efficacy in 4T1 tumor\u2013bearing mice, providing an innovative perspective for subcellular delivery and tumor treatment.<\/jats:p>","DOI":"10.1126\/sciadv.aeh0494","type":"journal-article","created":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T18:06:59Z","timestamp":1791569219000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":0,"title":["Senescent tumor cell membrane\u2013based \u201ctime engine\u201d nanosystem amplifies endoplasmic reticulum targeting for metastasis blockade"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-0702-0660","authenticated-orcid":true,"given":"Jing","family":"Tao","sequence":"first","affiliation":[{"name":"Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced 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