{"title":"Investigating the Structural and Magnetic Properties of Chitosan Coated CoFe2O4 Nanoparticles for Drug Delivery","authors":"W. Mdlalose","doi":"10.33552/ABEB.2020.04.000589","DOIUrl":null,"url":null,"abstract":"Magnetic nanoparticles (MNPs) are currently explored for use in biomedical applications, such as in MRI, hyperthermia and drug delivery. In this study, CoFe 2 O 4 and its calcium-substituted derivative viz. CS-Ca 0.5 Co 0.5 Fe 2 O 4 MNPs were synthesised via the glycol-thermal method. Furthermore, these MNPs were coated with chitosan (CS) to improve their biodegradability and biocompatibility. The anti-cancer drug, 5-fluorouracil (5-FU) was then loaded onto these MNPs to yield CS-Ca 0.5 Co 0.5 Fe 2 O 4 -5FU and CS-Ca 0.5 Co 0.5 Fe 2 O 4 -5FU. XRD results confirmed a single-phased cubic spinel structure for all MNPs. The naked MNPs displayed an average crystalline size of ~9.32 nm, which increased up to 18.20 nm upon coating. The VSM measurements recorded saturation magnetization values (Ms) of up to 73.951 emu/g. Upon polymer-coating, the shielding effect of chitosan resulted in reduced Ms of up to 17.220 emu/g in CS-Ca 0.5 Co 0.5 Fe 2 O 4 MNPs. Release profiles were determined at pH 4.5 and 7.4 over a period of 72 hours. A faster release of the drug was noted at the acidic pH with an accumulative release of 91.00% in CS-CoFe2O4-5FU. Coupled with a strong recommendation for in vitro studies, these MNPs present as attractive candidates to complement current anti-cancer treatments.","PeriodicalId":72276,"journal":{"name":"Archives in biomedical engineering & biotechnology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archives in biomedical engineering & biotechnology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.33552/ABEB.2020.04.000589","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Magnetic nanoparticles (MNPs) are currently explored for use in biomedical applications, such as in MRI, hyperthermia and drug delivery. In this study, CoFe 2 O 4 and its calcium-substituted derivative viz. CS-Ca 0.5 Co 0.5 Fe 2 O 4 MNPs were synthesised via the glycol-thermal method. Furthermore, these MNPs were coated with chitosan (CS) to improve their biodegradability and biocompatibility. The anti-cancer drug, 5-fluorouracil (5-FU) was then loaded onto these MNPs to yield CS-Ca 0.5 Co 0.5 Fe 2 O 4 -5FU and CS-Ca 0.5 Co 0.5 Fe 2 O 4 -5FU. XRD results confirmed a single-phased cubic spinel structure for all MNPs. The naked MNPs displayed an average crystalline size of ~9.32 nm, which increased up to 18.20 nm upon coating. The VSM measurements recorded saturation magnetization values (Ms) of up to 73.951 emu/g. Upon polymer-coating, the shielding effect of chitosan resulted in reduced Ms of up to 17.220 emu/g in CS-Ca 0.5 Co 0.5 Fe 2 O 4 MNPs. Release profiles were determined at pH 4.5 and 7.4 over a period of 72 hours. A faster release of the drug was noted at the acidic pH with an accumulative release of 91.00% in CS-CoFe2O4-5FU. Coupled with a strong recommendation for in vitro studies, these MNPs present as attractive candidates to complement current anti-cancer treatments.
磁性纳米颗粒(MNP)目前被探索用于生物医学应用,如MRI、热疗和药物递送。本研究采用乙二醇热法合成了CoFe2O4及其钙取代衍生物CS Ca 0.5 Co 0.5 Fe2O4 MNPs。此外,用壳聚糖(CS)包覆这些MNP以提高其生物降解性和生物相容性。然后将抗癌药物5-氟尿嘧啶(5-FU)负载到这些MNP上,得到CS-Ca 0.5 Co 0.5 Fe 2 O 4-5FU和CS-Ca 0.5 Co0.5 Fe 2 O 4-5FF。XRD结果证实了所有MNP的单相立方尖晶石结构。裸MNP显示出约9.32nm的平均晶体尺寸,在涂覆后增加到18.20nm。VSM测量记录的饱和磁化值(Ms)高达73.951emu/g。在聚合物涂层后,壳聚糖的屏蔽作用使CS Ca 0.5 Co 0.5 Fe 2 O 4 MNPs中的Ms降低了17.220 emu/g。在pH 4.5和7.4下测定72小时的释放曲线。在酸性pH下,药物释放更快,CS-CoFe2O4-5FU的累积释放率为91.00%。再加上强烈建议进行体外研究,这些MNP是补充当前抗癌治疗的有吸引力的候选药物。