PMID- 24853461 OWN - NLM STAT- MEDLINE DCOM- 20150219 LR - 20181202 IS - 1873-3476 (Electronic) IS - 0378-5173 (Linking) VI - 471 IP - 1-2 DP - 2014 Aug 25 TI - Incorporation of cisplatin into PEG-wrapped ultrapurified large-inner-diameter MWCNTs for enhanced loading efficiency and release profile. PG - 157-65 LID - S0378-5173(14)00362-7 [pii] LID - 10.1016/j.ijpharm.2014.05.022 [doi] AB - The efficacy of carbon nanotubes based drug delivery systems (DDSs) has long been compromised by low drug loading efficiency and rapid release profile, especially for drugs encapsulated inside nanotubes. To address these deficiencies, the large-inner-diameter multi-walled carbon nanotubes (LID-MWCNTs) were employed to synthesize an innovative cisplatin (CDDP)-loaded DDS. A multi-step purification and oxidation procedure was developed to achieve ultrapurified oxidized LID-MWCNTs prior to entrapping CDDP. High molecular weight polyethylene glycol (PEG) was grafted onto the nanotubes to partially block the exit paths of drugs. As assessed by TGA and ICP-OES analyses, CDDP loading efficiency of resulting DDS was as high as 100.12%, and sustained release profile was obtained. Finally, the anticancer activity on CAL-27 cells was evaluated, and enhanced inhibition effect (IC50 values 3.93 mug/ml) was recorded. The successful inner-cavity-loading of LID-MWCNTs also provides a basis for establishing more complicated multi-functional DDSs. CI - Copyright (c) 2014 Elsevier B.V. All rights reserved. FAU - Sui, Lei AU - Sui L AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. Electronic address: suilei@tmu.edu.cn. FAU - Yang, Tao AU - Yang T AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. Electronic address: ytdentist@outlook.com. FAU - Gao, Ping AU - Gao P AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. FAU - Meng, Ai AU - Meng A AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. FAU - Wang, Pingting AU - Wang P AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. FAU - Wu, Zhenzhen AU - Wu Z AD - School of Stomatology, Tianjin Medical University, China No.12, Qixiangtai Rd. Heping District, Tianjin 610041, China. FAU - Wang, Jian AU - Wang J AD - Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, China No.14, 3rd Section of Ren Min Nan Rd., Chengdu, Sichuan 610041, China. Electronic address: ferowang@hotmail.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140520 PL - Netherlands TA - Int J Pharm JT - International journal of pharmaceutics JID - 7804127 RN - 0 (Antineoplastic Agents) RN - 0 (Drug Carriers) RN - 0 (Nanotubes, Carbon) RN - 3WJQ0SDW1A (Polyethylene Glycols) RN - Q20Q21Q62J (Cisplatin) SB - IM MH - Animals MH - Antineoplastic Agents/*administration & dosage/chemistry/pharmacology MH - Cell Line, Tumor MH - Cell Survival/drug effects MH - Cisplatin/*administration & dosage/chemistry/pharmacology MH - Dose-Response Relationship, Drug MH - Drug Carriers/*chemistry MH - Drug Compounding MH - Drug Liberation MH - Fibroblasts/drug effects MH - Humans MH - Mice MH - Microscopy, Electron, Scanning MH - Nanotubes, Carbon/*chemistry MH - Oxidation-Reduction MH - Particle Size MH - Polyethylene Glycols/*chemistry MH - Surface Properties OTO - NOTNLM OT - Carbon nanotubes OT - Cisplatin OT - Cytotoxicity OT - Drug delivery system OT - Drug loading efficiency OT - Release profile EDAT- 2014/05/24 06:00 MHDA- 2015/02/20 06:00 CRDT- 2014/05/24 06:00 PHST- 2014/01/27 00:00 [received] PHST- 2014/05/09 00:00 [revised] PHST- 2014/05/16 00:00 [accepted] PHST- 2014/05/24 06:00 [entrez] PHST- 2014/05/24 06:00 [pubmed] PHST- 2015/02/20 06:00 [medline] AID - S0378-5173(14)00362-7 [pii] AID - 10.1016/j.ijpharm.2014.05.022 [doi] PST - ppublish SO - Int J Pharm. 2014 Aug 25;471(1-2):157-65. doi: 10.1016/j.ijpharm.2014.05.022. Epub 2014 May 20.