RT Journal Article SR Electronic T1 Biological Properties of the Aggregated Form of Chitosan Magnetic Nanoparticle JF In Vivo JO In Vivo FD International Institute of Anticancer Research SP 1729 OP 1738 DO 10.21873/invivo.11966 VO 34 IS 4 A1 ANGEL DAVID PAULINO-GONZALEZ A1 HIROSHI SAKAGAMI A1 KENJIRO BANDOW A1 YUMIKO KANDA A1 YUKO NAGASAWA A1 YASUSHI HIBINO A1 HIROSHI NAKAJIMA A1 SATOSHI YOKOSE A1 OSAMU AMANO A1 GIICHIROU NAKAYA A1 YUKARI KOGA-OGAWA A1 AKIYOSHI SHIROTO A1 TADAMASA NOBESAWA A1 DAISUKE UEDA A1 SACHIE NAKATANI A1 KENJI KOBATA A1 YOSUKE IIJIMA A1 SHINSUKE IFUKU A1 MASAJI YAMAMOTO A1 RENE GARCIA-CONTRERAS YR 2020 UL http://iv.iiarjournals.org/content/34/4/1729.abstract AB Background/Aim: Chitosan-coated iron oxide nanoparticles (Chi-NP) have gained attention because of their biocompatibility, biodegradability, low toxicity and targetability under magnetic field. In this study, we investigated various biological properties of Chi-NP. Materials and Methods: Chi-NP was prepared by mixing magnetic NP with chitosan FL-80. Particle size was determined by scanning and transmission electron microscopes, cell viability by MTT assay, cell cycle distribution by cell sorter, synergism with anticancer drugs by combination index, PGE2 production in human gingival fibroblast was assayed by ELISA. Results: The synthetic process of Chi-NP from FL-80 and magnetic NP increased the affinity to cells, up to the level attained by nanofibers. Upon contact with the culture medium, Chi-NP instantly formed aggregates and interfered with intracellular uptake. Aggregated Chi-NP did not show cytotoxicity, synergism with anticancer drugs, induce apoptosis (accumulation of subG1 cell population), protect the cells from X-ray-induced damage, nor affected both basal and IL-1β-induced PGE2 production. Conclusion: Chi-NP is biologically inert and shows high affinity to cells, further confirming its superiority as a scaffold for drug delivery.