{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T01:02:23Z","timestamp":1790211743162,"version":"4.1.0"},"reference-count":47,"publisher":"Maad Rayan Publishing Company","issue":"3","content-domain":{"domain":["apb.tbzmed.ac.ir"],"crossmark-restriction":false},"short-container-title":["Adv Pharm Bull"],"abstract":"<jats:p>Purpose: This study was aimed to evaluate the site-specific drug delivery of 5-FU with chitosan (CS) as a carrier and quercetin (Qu) against induced colon cancer in Wistar rats.  Methods: Cross-linked CS-Qu nanoparticles (NPs) were prepared by ionotropic gelation method. Physicochemical characterization of NPs was performed by Fourier-transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), in vitro drug release, and drug loading efficiency (LE). 1, 2-Dimethylhydrazine (DMH) and dextran sulfate sodium (DSS) were applied to induce adenocarcinoma tumors on inbred male Wistar rats\u2019 colon. The treatment group of rats was administered through enema with NPs dispersion. Hematoxylin and eosin staining were performed to the histopathological examination of tumors.  Results: Zeta potential and particle size for NPs were +53.5 \u00b1 5 mV and 179 \u00b1 28 nm, respectively. About 96% Qu LE was obtained with a maximum release of 5.63 \u00b11.59% and 4.62 \u00b1 1.33% after 24 hours in PB solution with pH values of 6 and 7.4, respectively. The numbers of 8 to 21 tumors were observed in all rats administered with DMH and DSS. Significantly decreasing of microvascular density and mitosis count was detected in the treatment group in comparison with cancerous group (P = 0.032 for the former compared to P = 0.016 for the later), respectively. Furthermore, the treatment group showed a high apoptosis rate (P = 0.038).    Conclusion: The developed Qu-loaded CS NPs were good candidates for site-specific and sustained drug release in enema treatment. Decreasing of microvascular density and mitosis count, along with increasing the apoptosis percent in the treatment group proved that the NPs could have promising results in site-specific and sustained drug delivery against colorectal cancer.<\/jats:p>","DOI":"10.15171\/apb.2019.048","type":"journal-article","created":{"date-parts":[[2019,8,31]],"date-time":"2019-08-31T01:57:55Z","timestamp":1567216675000},"page":"409-415","update-policy":"https:\/\/doi.org\/10.15171\/crossmark_policy","source":"Crossref","is-referenced-by-count":56,"title":["Anti-tumor Effect of Quercetin Loaded Chitosan Nanoparticles on Induced Colon Cancer in Wistar Rats"],"prefix":"10.34172","volume":"9","author":[{"given":"Jalil","family":"Rashedi","sequence":"first","affiliation":[{"name":"Department of Biochemistry, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amir","family":"Ghorbani 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