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Wang M, Sun J, Zhai Y, Lian H, Luo C, Li L, Du Y, Zhang D, Ding W, Qiu S, Liu Y, Kou L, Han X, Xiang R, Wang Y, He Z. Enteric polymer based on pH-responsive aliphatic polycarbonate functionalized with vitamin E to facilitate oral delivery of tacrolimus. Biomacromolecules 2015; 16:1179-90. [PMID: 25714622 DOI: 10.1021/bm501847u] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
To improve the bioavailability of orally administered drugs, we synthesized a pH-sensitive polymer (poly(ethylene glycol)-poly(2-methyl-2-carboxyl-propylene carbonate)-vitamin E, mPEG-PCC-VE) attempting to integrate the advantages of enteric coating and P-glycoprotein (P-gp) inhibition. The aliphatic polycarbonate chain was functionalized with carboxyl groups and vitamin E via postpolymerization modification. Optimized by comparison and central composite design, mPEG113-PCC32-VE4 exhibited low critical micelle concentration of 1.7 × 10(-6) mg/mL and high drug loading ability for tacrolimus (21.2% ± 2.7%, w/w). The pH-responsive profile was demonstrated by pH-dependent swelling and in vitro drug release. Less than 4.0% tacrolimus was released under simulated gastric fluid after 2.5 h, whereas an immediate release was observed under simulated intestinal fluid. The mPEG113-PCC32-VE4 micelles significantly increased the absorption of P-gp substrate tacrolimus in the whole intestine. The oral bioavailability of tacrolimus micelles was 6-fold higher than that of tacrolimus solution in rats. This enteric polymer therefore has the potential to become a useful nanoscale carrier for oral delivery of drugs.
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Affiliation(s)
- Menglin Wang
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Jin Sun
- ‡Municipal Key Laboratory of Biopharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Yinglei Zhai
- §School of Medical Instrument, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - He Lian
- §School of Medical Instrument, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Cong Luo
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Lin Li
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Yuqian Du
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Dong Zhang
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Wenya Ding
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Shuhong Qiu
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Yuhai Liu
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Longfa Kou
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Xiangfei Han
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Rongwu Xiang
- §School of Medical Instrument, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Yongjun Wang
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
| | - Zhonggui He
- †Department of Pharmaceutical Sciences, School of Pharmacy, Shenyang Pharmaceutical University, No. 103, Wenhua Road, Shenyang, 110016, China
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Ju XJ, Xie R, Yang L, Chu LY. Biodegradable 'intelligent' materials in response to chemical stimuli for biomedical applications. Expert Opin Ther Pat 2009; 19:683-96. [PMID: 19441941 DOI: 10.1517/13543770902769617] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Biodegradable stimuli-responsive materials, which exhibit large and sharp physical-chemical changes in response to small physical or chemical stimuli, are attracting increasing interests because of their potential applications in biomedical fields, such as transient implants, drug delivery carriers, and tissue engineering scaffolds. Our previous review (see page 493 of issue 4) summarized those biodegradable 'intelligent' materials that respond to physical stimuli, such as temperature, ultrasound, and magnetic field. Biodegradable 'intelligent' materials that could respond to chemical stimuli, such as pH and specific molecules, have also been studied intensively and significant progress in this field has been achieved. As a single stimulus-responsive property would limit practical application, multi-stimuli-responsive materials are receiving increasing interest and considerable attention. OBJECTIVE/METHODS This review summarizes the development of biodegradable 'intelligent' materials in response to chemical stimuli and to dual stimuli; their potential biomedical applications are also introduced. A detailed analysis of publications and patents on such materials in recent years is presented. RESULTS/CONCLUSION Most of biodegradable stimuli-responsive materials are currently still at a developmental research stage. Further work is required to improve the responsive properties between the materials and the biological environments, so that the clinical applicability of such devices could be successful. We hope that our review will be helpful in the future development of new stimuli-responsive biodegradable polymers or polymeric systems that can be used reliably in real-life applications.
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Affiliation(s)
- Xiao-Jie Ju
- Sichuan University, School of Chemical Engineering, Chengdu, Sichuan 610065, China
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Zheng Y, Yang W, Wang C, Hu J, Fu S, Dong L, Wu L, Shen X. Nanoparticles based on the complex of chitosan and polyaspartic acid sodium salt: Preparation, characterization and the use for 5-fluorouracil delivery. Eur J Pharm Biopharm 2007; 67:621-31. [PMID: 17533123 DOI: 10.1016/j.ejpb.2007.04.007] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2006] [Revised: 03/22/2007] [Accepted: 04/05/2007] [Indexed: 11/27/2022]
Abstract
New nonstoichiometric polyelectrolyte complex nanoparticles were prepared based on chitosan (CS) and polyaspartic acid sodium salt (PAsp). The physicochemical properties of the complexes were investigated by means of turbidity, dynamic light scattering, transmission electron microscopy and zeta potential. The results indicated that the slow dropwise addition of chitosan into PAsp allowed to elaborate either anionic or cationic particles in the size range of 85-300 nm with proper CS and PAsp unit molar ratios. Investigation of structural changes during the addition of CS revealed that the microstructure of the nanoparticles depended strongly on the unit molar ratio of CS to PAsp. Nanoparticles containing a hydrophilic drug, 5-fluorouracil (5FU), were prepared by mixing and absorption method. In vitro and in vivo experiment indicated that the drug-loaded CS-PAsp nanoparticles presented a sustained release of 5FU compared to the 5FU solution and the areas under curve (AUC) were increased by about four times.
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Affiliation(s)
- Yongli Zheng
- Department of Macromolecular Science, Fudan University, and Zhongshan Hospital, Shanghai, China
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