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Song M, Aipire A, Dilxat E, Li J, Xia G, Jiang Z, Fan Z, Li J. Research Progress of Polysaccharide-Gold Nanocomplexes in Drug Delivery. Pharmaceutics 2024; 16:88. [PMID: 38258099 PMCID: PMC10820823 DOI: 10.3390/pharmaceutics16010088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/25/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
Clinical drug administration aims to deliver drugs efficiently and safely to target tissues, organs, and cells, with the objective of enabling their therapeutic effects. Currently, the main approach to enhance a drug's effectiveness is ensuring its efficient delivery to the intended site. Due to the fact that there are still various drawbacks of traditional drug delivery methods, such as high toxicity and side effects, insufficient drug specificity, poor targeting, and poor pharmacokinetic performance, nanocarriers have emerged as a promising alternative. Nanocarriers possess significant advantages in drug delivery due to their size tunability and surface modifiability. Moreover, nano-drug delivery systems have demonstrated strong potential in terms of prolonging drug circulation time, improving bioavailability, increasing drug retention at the tumor site, decreasing drug resistance, as well as reducing the undesirable side effects of anticancer drugs. Numerous studies have focused on utilizing polysaccharides as nanodelivery carriers, developing delivery systems based on polysaccharides, or exploiting polysaccharides as tumor-targeting ligands to enhance the precision of nanoparticle delivery. These types of investigations have become commonplace in the academic literature. This review aims to elucidate the preparation methods and principles of polysaccharide gold nanocarriers. It also provides an overview of the factors that affect the loading of polysaccharide gold nanocarriers with different kinds of drugs. Additionally, it outlines the strategies employed by polysaccharide gold nanocarriers to improve the delivery efficiency of various drugs. The objective is to provide a reference for further development of research on polysaccharide gold nanodelivery systems.
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Affiliation(s)
- Ming Song
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Adila Aipire
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Elzira Dilxat
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Jianmin Li
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Guoyu Xia
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Ziwen Jiang
- Department of Gynecology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing 100006, China;
| | - Zhongxiong Fan
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
| | - Jinyao Li
- Institute of Materia Medica & College of Life Science and Technology, Xinjiang University, Urumqi 830017, China; (M.S.); (A.A.); (E.D.); (J.L.); (G.X.)
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Li J, Li Y, Zhong Z, Fu X, Li Z. One-pot self-assembly fabrication of chitosan coated hollow sphere for pH/ glutathione dual responsive drug delivery. Colloids Surf B Biointerfaces 2022; 218:112773. [PMID: 36007312 DOI: 10.1016/j.colsurfb.2022.112773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 08/04/2022] [Accepted: 08/10/2022] [Indexed: 11/18/2022]
Abstract
Chitosan-coated poly (methacrylic acid) (PMAA) hollow spheres with 64 ± 3% drug loading capacity and low drug leakage (7 ± 2%, 54 h) were prepared through a novel one-pot two-step self-assembly process. Site-specific doxorubicin (DOX) loading and chitosan coating were achieved by electrostatic interaction to fulfill efficient drug loading and well-controlled drug release behavior. In vitro drug release profile revealed the pH and glutathione (GSH) dual responsive fast triggered drug release behavior, reaching 62 ± 3% during the first 10 h. And completely drug release could be achieved in 54 h. The high drug content and sensitive tumor microenvironment responsibility lead to similar anti-cancer efficiency with free doxorubicin in in vitro MTT assay. This self-assembly guided one-pot two-step fabrication process was proved to be an effective and convenient way to prepare the well-defined multi-layer structure and might be further employed in fabricating high-performance drug delivery systems.
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Affiliation(s)
- Jiagen Li
- College of Chemistry and Life Science, Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, Chengdu Normal University, Chengdu, China.
| | - Yaqi Li
- College of Chemistry and Life Science, Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, Chengdu Normal University, Chengdu, China
| | - Zhanqiong Zhong
- Chengdu University of Traditional Chinese Medicine, 610075 Chengdu, China
| | - Xiaohong Fu
- College of Chemistry and Life Science, Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, Chengdu Normal University, Chengdu, China.
| | - Zhonghui Li
- College of Chemistry and Life Science, Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, Chengdu Normal University, Chengdu, China.
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Zou L, Zhang Z, Feng J, Ding W, Li Y, Liang D, Xie T, Li F, Li Y, Chen J, Yang X, Tang L, Ding W. Case ReportPaclitaxel-loaded TPGS 2k/Gelatin-grafted Cyclodextrin/Hyaluronic acid-grafted Cyclodextrin nanoparticles for oral bioavailability and targeting enhancement. J Pharm Sci 2022; 111:1776-1784. [PMID: 35341722 DOI: 10.1016/j.xphs.2022.03.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/19/2022] [Accepted: 03/21/2022] [Indexed: 01/20/2023]
Abstract
The clinical applications of paclitaxel (PTX), a natural compound with broad-spectrum antitumor effects, have been markedly limited owing to its poor oral bioavailability and lack of targeting ability. Recently, several drug carriers, such as TPGS2k, gelatin (Gel), cyclodextrin (CD), and hyaluronic acid (HA), have been identified as promising enhancers of drug efficacy. Therefore, Gel-grafted CD (GEL-CD) and HA-grafted CD (HA-CD) were synthesized via grafting, and PTX-loaded TPGS2k/GEL-CD/HA-CD nanoparticles (TGHC-PTX-NPs) were successfully prepared using the ultrasonic crushing method. The mean particles size, polydispersity index, and Zeta potential of TGHC-PTX-NPs were 253.57 ± 2.64 nm, 0.13 ± 0.03, and 0.087 ± 0.005 mV, respectively. TGHC-PTX-NPs with an encapsulation efficiency of 61.77 ± 0.47% and a loading capacity of 6.86 ± 0.32% appeared round and uniformly dispersed based on transmission electron microscopy. In vitro release data revealed that TGHC-PTX-NPs had good sustained-release properties. Further, TGHC-PTX-NPs had increased the targeted uptake by HeLa cells as HA can specifically bind to the CD44 receptor at the cell surface, and its intestinal absorption is related to caveolin-mediated endocytosis. The pharmacokinetic results indicated that TGHC-PTX-NPs significantly enhanced the absorption of PTX in vivo compared to the PTX suspension, with a relative bioavailability of 227.21%. Such findings indicate the potential of TGHC-PTX-NPs for numerous clinical applications.
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Affiliation(s)
- Linghui Zou
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Zhongbin Zhang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; Key Laboratory of Common Technology of Chinese Medicine Preparations, Guangxi University of Chinese Medicine, Nanning, China
| | - Jianfang Feng
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; South China Branch of National Engineering Research Center for Manufacturing Technology of Traditional Chinese Medicine Solid Preparation, Nanning, China
| | - Wenyou Ding
- Basic Courses Department of Wuhan Donghu University
| | - Yanhua Li
- College of Veterinary Medicine, Northeast Agricultural University
| | - Dan Liang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; Key Laboratory of Common Technology of Chinese Medicine Preparations, Guangxi University of Chinese Medicine, Nanning, China
| | - Tanfang Xie
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; Key Laboratory of Common Technology of Chinese Medicine Preparations, Guangxi University of Chinese Medicine, Nanning, China
| | - Fang Li
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; Key Laboratory of Common Technology of Chinese Medicine Preparations, Guangxi University of Chinese Medicine, Nanning, China
| | - Yuyang Li
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Jinqing Chen
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Xu Yang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Ling Tang
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China
| | - Wenya Ding
- College of Pharmacy, Guangxi University of Chinese Medicine, Nanning, China; College of Veterinary Medicine, Northeast Agricultural University; Key Laboratory of Common Technology of Chinese Medicine Preparations, Guangxi University of Chinese Medicine, Nanning, China.
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Cyphert EL, Kanagasegar N, Zhang N, Learn GD, von Recum HA. PMMA Bone Cement Composite Functions as an Adjuvant Chemotherapeutic Platform for Localized and Multi-Window Release During Bone Reconstruction. Macromol Biosci 2022; 22:e2100415. [PMID: 35113499 DOI: 10.1002/mabi.202100415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/06/2022] [Indexed: 11/10/2022]
Abstract
Primary bone tumor resections often result in critical size defects, which then necessitate challenging clinical management approaches to reconstruct. One such intervention is the Masquelet technique, in which poly(methyl methacrylate) (PMMA) bone cement is placed as a spacer temporarily while adjuvant chemotherapeutics are administered systemically. The spacer is later removed and replaced with bone autograft. Local recurrence remains an important and devastating problem, therefore, a system capable of locally delivering chemotherapeutics would present unique advantages. In this work, a refillable chemotherapeutic (doxorubicin, DOX) delivery platform comprised of PMMA bone cement and insoluble γ-cyclodextrin (γ-CD) polymeric microparticles is developed and explored towards application as a temporary adjuvant chemotherapeutic spacer. The system is characterized for porosity, mechanical strength, DOX filling and refilling capacity, elution kinetics, and cytotoxicity. Since residual chemotherapeutics could adversely impact bone healing, it is important that virtually all DOX be released from material. Composites containing 15wt% γ-CD microparticles demonstrate 100% DOX release within 100 days, whereas only 6% DOX is liberated from PMMA with free DOX over same period. Refillable properties of PMMA composite system may find utility for customizing dosing regimens. Findings suggest that PMMA composites could have potential as chemotherapeutic delivery platforms to assist in bone reconstruction. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Erika L Cyphert
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Nithya Kanagasegar
- School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Ningjing Zhang
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Greg D Learn
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Horst A von Recum
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
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Ameli H, Alizadeh N. Targeted delivery of capecitabine to colon cancer cells using nano polymeric micelles based on beta cyclodextrin. RSC Adv 2022; 12:4681-4691. [PMID: 35425510 PMCID: PMC8981441 DOI: 10.1039/d1ra07791k] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/17/2022] [Indexed: 12/22/2022] Open
Abstract
Nano polymeric micelles (nano PMs) help to increase accessibility to tumor sites, decrease side effects and allow controlled drug dissemination over a long period of time. The aim of this study was to optimize the delivery of the anticancer drug capecitabine (CAP) using nano PMs and cyclodextrin (CD) to allow the treatment of colon cancer. A pH-responsive copolymer was prepared and the variables of loading time, loading temperature, the amount of copolymer and also the ratio of acrylic/maleic copolymer to beta CD and the effect that these variables have on drug loading were investigated, with variable optimization studies carried out following a definitive screening design (DSD). The morphology and structure of the particles were determined by scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) spectroscopy. In vitro drug release exemplified that the micelles were pH-sensitive, this action was shown that firstly the drug release was done perfectly targeted and under control and secondly the drug has been released above 80% inside the colon. Nano polymeric micelles (nano PMs) help to increase accessibility to tumor sites, decrease side effects and allow controlled drug dissemination over a long period of time.![]()
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Affiliation(s)
- Hossein Ameli
- Department of Chemistry, Faculty of Science, University of Guilan P.B. 41335-1914 Rasht Iran
| | - Nina Alizadeh
- Department of Chemistry, Faculty of Science, University of Guilan P.B. 41335-1914 Rasht Iran
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Dual Targeting of Cancer Cells and MMPs with Self-Assembly Hybrid Nanoparticles for Combination Therapy in Combating Cancer. Pharmaceutics 2021; 13:pharmaceutics13121990. [PMID: 34959271 PMCID: PMC8707712 DOI: 10.3390/pharmaceutics13121990] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/05/2021] [Accepted: 11/19/2021] [Indexed: 01/21/2023] Open
Abstract
The co-delivery of chemotherapeutic agents and immune modulators to their targets remains to be a great challenge for nanocarriers. Here, we developed a hybrid thermosensitive nanoparticle (TMNP) which could co-deliver paclitaxel-loaded transferrin (PTX@TF) and marimastat-loaded thermosensitive liposomes (MMST/LTSLs) for the dual targeting of cancer cells and the microenvironment. TMNPs could rapidly release the two payloads triggered by the hyperthermia treatment at the site of tumor. The released PTX@TF entered cancer cells via transferrin-receptor-mediated endocytosis and inhibited the survival of tumor cells. MMST was intelligently employed as an immunomodulator to improve immunotherapy by inhibiting matrix metalloproteinases to reduce chemokine degradation and recruit T cells. The TMNPs promoted the tumor infiltration of CD3+ T cells by 2-fold, including memory/effector CD8+ T cells (4.2-fold) and CD4+ (1.7-fold), but not regulatory T cells. Our in vivo anti-tumor experiment suggested that TMNPs possessed the highest tumor growth inhibitory rate (80.86%) compared with the control group. We demonstrated that the nanoplatform could effectively inhibit the growth of tumors and enhance T cell recruitment through the co-delivery of paclitaxel and marimastat, which could be a promising strategy for the combination of chemotherapy and immunotherapy for cancer treatment.
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Exemestane encapsulated copolymers L121/F127/GL44 based mixed micelles: solubility enhancement and in vitro cytotoxicity evaluation using MCF-7 breast cancer cells. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2021. [DOI: 10.1007/s40005-021-00540-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Enhanced Oral Absorption of Icaritin by Using Mixed Polymeric Micelles Prepared with a Creative Acid-Base Shift Method. Molecules 2021; 26:molecules26113450. [PMID: 34204150 PMCID: PMC8201319 DOI: 10.3390/molecules26113450] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 11/18/2022] Open
Abstract
The purpose of this study was to develop mixed polymeric micelles with high drug loading capacity to improve the oral bioavailability of icaritin with Soluplus® and Poloxamer 407 using a creative acid-base shift (ABS) method, which exhibits the advantages of exclusion of organic solvents, high drug loading and ease of scaling-up. The feasibility of the ABS method was successfully demonstrated by studies of icaritin-loaded polymeric micelles (IPMs). The prepared IPMs were characterized to have a spherical shape with a size of 72.74 ± 0.51 nm, and 13.18% drug loading content. In vitro release tests confirmed the faster release of icaritin from IPMs compared to an oil suspension. Furthermore, bioavailability of icaritin in IPMs in beagle dogs displayed a 14.9-fold increase when compared with the oil suspension. Transcellular transport studies of IPMs across Caco-2 cell monolayers confirmed that the IPMs were endocytosed in their intact forms through macropinocytosis, clathrin-, and caveolae-mediated pathways. In conclusion, the results suggested that the mixed micelles of Soluplus® and Poloxamer 407 could be a feasible drug delivery system to enhance oral bioavailability of icaritin, and the ABS method might be a promising technology for the preparation of polymeric micelles to encapsulate poorly water-soluble weakly acidic and alkaline drugs.
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Purchel AA, Boyle WS, Reineke TM. Aggregated Solution Morphology of Poly(acrylic acid)-Poly(styrene) Block Copolymers Improves Drug Supersaturation Maintenance and Caco-2 Cell Membrane Permeation. Mol Pharm 2019; 16:4423-4435. [PMID: 31633362 DOI: 10.1021/acs.molpharmaceut.9b00002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Amorphous solid dispersions of polymers and drugs have been shown to improve supersaturation maintenance of poorly water-soluble drugs. Herein, amorphous spray-dried dispersions (SDDs) of poly(acrylic acid)-polystyrene (PS-b-PAA) diblock copolymers with differing degrees of polymerization were prepared in aggregated and nonaggregated states with the Biopharmaceutical Classification System Class II drug, probucol (PBC). Specifically, PS90-b-PAA15, PS90-b-PAA80, PS38-b-PAA220, and PS38-b-PAA320 amphiphilic block polymers that covered a compositional range in the area of oral drug delivery were prepared to examine the role of molecular weight and controlled aggregation in promoting drug supersaturation and maintenance. In addition, hydrophilic homopolymers PAA20, PAA96, PAA226, and PAA392 were prepared as controls to evaluate the role of the block copolymer-based SDDs in PBC solubilization. Characterization such as powder X-ray diffraction, scanning electron microscopy, and dissolution tests under nonsink conditions were then performed to evaluate the SDDs. When comparing the block copolymer systems, polymers that were preaggregated into micellular structures prior to spray drying with the drug promoted higher drug solubility and maintenance than when the drug was formulated with molecularly dissolved PS-PAA block polymer. Interestingly, the aggregated PS90-b-PAA80 SDD with 25 wt % PBC achieved 100% burst release and maintained full supersaturation of PBC at pH 6.5 (physiological pH in the small intestine). Dissolution studies conducted at the pH of the stomach (pH = 1.2) show that a minimal amount of drug (∼10 μg/mL) was released, which could be used for protecting drugs from acidic environments (stomach) before reaching the small intestine. To evaluate drug bioavailability, in vitro Caco-2 cell assays were performed, which reveal that PAA-based excipients do not hinder drug permeation across the epithelial membrane and that PS90-b-PAA80 SDD with 25 wt % PBC achieved the highest membrane permeability coefficient. This work demonstrates that block copolymer-based SDDs capable of preaggregating into nanostructures may be a tunable drug-delivery platform that can improve solubility and supersaturation maintenance of Class II pharmaceutics while also not prohibiting bioavailability through model intestinal membranes. Indeed, this concept may be extended to accommodate a myriad of pharmaceutical and excipient structures.
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Affiliation(s)
- Anatolii A Purchel
- Department of Chemistry , University of Minnesota , 207 Pleasant St. SE , Minneapolis , Minnesota 55455-0431 , United States
| | - William S Boyle
- Department of Chemistry , University of Minnesota , 207 Pleasant St. SE , Minneapolis , Minnesota 55455-0431 , United States
| | - Theresa M Reineke
- Department of Chemistry , University of Minnesota , 207 Pleasant St. SE , Minneapolis , Minnesota 55455-0431 , United States
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Smart pH-responsive polymeric micelles for programmed oral delivery of insulin. Colloids Surf B Biointerfaces 2019; 183:110443. [DOI: 10.1016/j.colsurfb.2019.110443] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 07/24/2019] [Accepted: 08/15/2019] [Indexed: 11/17/2022]
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Maurya A, Singh AK, Mishra G, Kumari K, Rai A, Sharma B, Kulkarni GT, Awasthi R. Strategic use of nanotechnology in drug targeting and its consequences on human health: A focused review. Interv Med Appl Sci 2019; 11:38-54. [PMID: 32148902 PMCID: PMC7044564 DOI: 10.1556/1646.11.2019.04] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 01/03/2019] [Accepted: 01/28/2019] [Indexed: 02/06/2023] Open
Abstract
Since the development of first lipid-based nanocarrier system, about 15% of the present pharmaceutical market uses nanomedicines to achieve medical benefits. Nanotechnology is an advanced area to meliorate the delivery of compounds for improved medical diagnosis and curing disease. Nanomedicines are gaining significant interest due to the ultra small size and large surface area to mass ratio. In this review, we discuss the potential of nanotechnology in delivering of active moieties for the disease therapy including their toxicity evidences. This communication will help the formulation scientists in understanding and exploring the new aspects of nanotechnology in the field of nanomedicine.
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Affiliation(s)
- Anand Maurya
- Faculty of Ayurveda, Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Anurag Kumar Singh
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Gaurav Mishra
- Faculty of Ayurveda, Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Komal Kumari
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Ajmer, India
| | - Arati Rai
- Department of Pharmacy, Hygia Institute of Pharmaceutical Education and Research, Lucknow, India
| | - Bhupesh Sharma
- Amity Institute of Pharmacy, Amity University, Noida, India
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Lin YJ, Mi FL, Lin PY, Miao YB, Huang T, Chen KH, Chen CT, Chang Y, Sung HW. Strategies for improving diabetic therapy via alternative administration routes that involve stimuli-responsive insulin-delivering systems. Adv Drug Deliv Rev 2019; 139:71-82. [PMID: 30529306 DOI: 10.1016/j.addr.2018.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 11/06/2018] [Accepted: 12/03/2018] [Indexed: 12/13/2022]
Abstract
The encapsulation of insulin in micro- or nanodelivery systems may eliminate the need for frequent subcutaneous injections, improving the quality of life of diabetic patients. Formulations for oral, intranasal, pulmonary, subcutaneous, and transdermal administration have been developed. The use of stimuli-responsive polymeric carriers that can release the encapsulated drug in response to changes of the environmental stimuli or external activation enables the design of less invasive or non-invasive systems for smart insulin delivery from depots in the body. This article will look at strategies for the development of responsive delivery systems and the future meeting of the demands of new modes of insulin delivery.
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Mejías FJR, Gutiérrez MT, Durán AG, Molinillo JMG, Valdivia MM, Macías FA. Provitamin supramolecular polymer micelle with pH responsiveness to control release, bioavailability enhancement and potentiation of cytotoxic efficacy. Colloids Surf B Biointerfaces 2018; 173:85-93. [PMID: 30273872 DOI: 10.1016/j.colsurfb.2018.09.057] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 09/21/2018] [Accepted: 09/22/2018] [Indexed: 12/22/2022]
Abstract
Encapsulation techniques to generate core/shell systems provide a method that improves physicochemical properties, which are very important in biological applications. β-carotene is a common carotenoid that has shown preventive effects in skin diseases and vitamin A deficiency but this compound has limited water solubility and bioavailability, which hinder its broad application. The use of polyrotaxane compounds formed from cyclodextrins has allowed supramolecular polymer micelles (SMPMs) to be synthesized to encapsulate β-carotene. The polymeric compound Pluronic F127® was also used to create core/shell nanoparticles (NPs) that contain β-carotene. Bioactive compound encapsulation was fully confirmed by nuclear magnetic resonance spectroscopy and by scanning and transmission electron microscopy. The method based on cyclodextrin and lecithin allow to release slowly when the systems were exposed to an aqueous medium by pH control, with an increase of 16 times of bioavailability comparing with free carotenoid. This allowed to potentiate the cytotoxic activity on a melanoma cell line by enhancing the water solubility to more than 28 mg/L, and present promising applications of SMPMs to provitamins.
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Affiliation(s)
- Francisco J R Mejías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional (ceiA3), School of Science, University of Cadiz, C/ República Saharaui, 7, 11510, Puerto Real, Cádiz, Spain
| | - M Teresa Gutiérrez
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional (ceiA3), School of Science, University of Cadiz, C/ República Saharaui, 7, 11510, Puerto Real, Cádiz, Spain
| | - Alexandra G Durán
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional (ceiA3), School of Science, University of Cadiz, C/ República Saharaui, 7, 11510, Puerto Real, Cádiz, Spain
| | - José M G Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional (ceiA3), School of Science, University of Cadiz, C/ República Saharaui, 7, 11510, Puerto Real, Cádiz, Spain
| | - Manuel M Valdivia
- Department of Biomedicine, Biotechnology and Public Health, Institute of Biomolecules (INBIO), School of Science, University of Cadiz, C/República Saharaui, 7, 11510 Puerto Real, Cádiz, Spain
| | - Francisco A Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), Campus de Excelencia Internacional (ceiA3), School of Science, University of Cadiz, C/ República Saharaui, 7, 11510, Puerto Real, Cádiz, Spain.
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Qu X, Zou Y, He C, Zhou Y, Jin Y, Deng Y, Wang Z, Li X, Zhou Y, Liu Y. Improved intestinal absorption of paclitaxel by mixed micelles self-assembled from vitamin E succinate-based amphiphilic polymers and their transcellular transport mechanism and intracellular trafficking routes. Drug Deliv 2018; 25:210-225. [PMID: 29313392 PMCID: PMC6058530 DOI: 10.1080/10717544.2017.1419513] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
To ensure that antitumor drugs can be effectively transported across intestinal barrier and then quickly released in tumor cells, mixed polymeric micelles (Mix-PMs) were designed and fabricated by combining poly(2-ethyl-2-oxazoline)-vitamin E succinate (PEOz-VES) with TPGS1000 for enhancing intestinal absorption of paclitaxel. PEOz-VES exhibited an extremely low critical micelle concentration and negligible cytotoxicity. The Mix-PMs were characterized to have about 20 nm in diameter, uniform spherical morphology, high drug-loading content and sustained drug release profile with a retained pH-sensitivity. The results of the transport through Caco-2 cell monolayers and intestinal absorption revealed that Mix-PMs displayed higher transcellular transport efficiency compared with PEOz-VES micelles and Taxol®. The possible mechanism of transcellular transport for Mix-PMs was elucidated to be mainly through clathrin- and caveolae/lipid rafts-mediated transcytosis. Confocal laser scanning micrographs revealed that late endosomes, lysosomes, endoplasmic reticulum, Golgi apparatus, and mitochondria were all involved in intracellular trafficking of Mix-PMs. The proteins involved in transcytosis of Mix-PMs and finally excreted were unraveled for the first time by the analysis of proteins in the basolateral media according to the proteomics method. Consequently, the fabricated mixed polymeric micelles may have great potential in enhancing intestinal absorption and accelerating drug release in tumor cells.
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Affiliation(s)
- Xiaoyou Qu
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yang Zou
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Chuyu He
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yuanhang Zhou
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yao Jin
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yunqiang Deng
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Ziqi Wang
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Xinru Li
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yanxia Zhou
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
| | - Yan Liu
- a Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems , School of Pharmaceutical Sciences, Peking University , Beijing , China
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15
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Chen Q, Li S, Feng Z, Wang M, Cai C, Wang J, Zhang L. Poly(2-(diethylamino)ethyl methacrylate)-based, pH-responsive, copolymeric mixed micelles for targeting anticancer drug control release. Int J Nanomedicine 2017; 12:6857-6870. [PMID: 29066882 PMCID: PMC5604559 DOI: 10.2147/ijn.s143927] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have demonstrated a novel drug delivery system to improve the selectivity of the current chemotherapy by pH-responsive, polymeric micelle carriers. The micelle carriers were prepared by the self-assembly of copolymers containing the polybasic poly(2-(diethylamino) ethyl methacrylate) (PDEAEMA) block. The mixed copolymers exhibited a comparatively low critical micelle concentration (CMC; 1.95-5.25 mg/L). The resultant mixed micelles were found to be <100 nm and were used to encapsulate the anticancer drug doxorubicin (DOX) with pretty good drug-loading content (24%) and entrapment efficiency (55%). Most importantly, the micelle carrier exhibited a pH-dependent conformational conversion and promoted the DOX release at the tumorous pH. Our in vitro studies demonstrated the comparable level of DOX-loaded mixed micelle delivery into tumor cells with the free DOX (80% of the tumor cells were killed after 48 h incubation). The DOX-loaded mixed micelles were effective to inhibit the proliferation of tumor cells after prolonged incubation. Overall, the pH-responsive mixed micelle system provided desirable potential in the controlled release of anticancer therapeutics.
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Affiliation(s)
- Quan Chen
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, People’s Republic of China
| | - Siheng Li
- Department of Chemistry, University of Houston, Houston, TX, USA
| | - Zixiong Feng
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, People’s Republic of China
| | - Meng Wang
- School of Bioscience & Bioengineering, South China University of Technology, Guangzhou, People’s Republic of China
| | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX, USA
| | - Jufang Wang
- School of Bioscience & Bioengineering, South China University of Technology, Guangzhou, People’s Republic of China
| | - Lijuan Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, People’s Republic of China
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16
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Whang CH, Kim KS, Bae J, Chen J, Jun HW, Jo S. Novel Biodegradable Polymer with Redox-Triggered Backbone Cleavage Through Sequential 1,6-Elimination and 1,5-Cyclization Reactions. Macromol Rapid Commun 2017; 38. [PMID: 28833950 DOI: 10.1002/marc.201700395] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/20/2017] [Indexed: 01/10/2023]
Abstract
In the past decade, the self-immolative biodegradable polymer arose as a novel paradigm for its efficient degradation mechanism and vast potential for advanced biomedical applications. This study reports successful synthesis of a novel biodegradable polymer capable of self-immolative backbone cleavage. The monomer is designed by covalent conjugations of both pendant redox-trigger (p-nitrobenzyl alcohol) and self-immolative linker (p-hydroxybenzyl alcohol) to the cyclization spacer (n-2-(hydroxyethyl)ethylene diamine), which serves as the structural backbone. The polymerization of the monomer with hexamethylene diisocyanate yields a linear redox-sensitive polymer that can systemically degrade via sequential 1,6-elimination and 1,5-cyclization reactions within an effective timeframe. Ultimately, the polymer's potential for biomedical application is simulated through in vitro redox-triggered release of paclitaxel from polymeric nanoparticles.
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Affiliation(s)
- Chang-Hee Whang
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS, 38677, USA
| | - Kyeong Soo Kim
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS, 38677, USA
| | - Jungeun Bae
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS, 38677, USA
| | - Jun Chen
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Ho-Wook Jun
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Seongbong Jo
- Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS, 38677, USA
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17
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Kakkar A, Traverso G, Farokhzad OC, Weissleder R, Langer R. Evolution of macromolecular complexity in drug delivery systems. Nat Rev Chem 2017; 1:63. [PMID: 31286060 PMCID: PMC6613785 DOI: 10.1038/s41570-017-0063] [Citation(s) in RCA: 192] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Designing therapeutics is a process with many challenges. Even if the first hurdle - designing a drug that modulates the action of a particular biological target in vitro - is overcome, selective delivery to that target in vivo presents a major barrier. Side-effects can, in many cases, result from the need to use higher doses without targeted delivery. However, the established use of macromolecules to encapsulate or conjugate drugs can provide improved delivery, and stands to enable better therapeutic outcomes. In this Review, we discuss how drug delivery approaches have evolved alongside our ability to prepare increasingly complex macromolecular architectures. We examine how this increased complexity has overcome the challenges of drug delivery and discuss its potential for fulfilling unmet needs in nanomedicine.
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Affiliation(s)
- Ashok Kakkar
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
| | - Giovanni Traverso
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School
| | - Omid C Farokhzad
- Center for Nanomedicine and Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Ralph Weissleder
- Center for Systems Biology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA
| | - Robert Langer
- Harvard-MIT Division of Health Sciences, Department of Chemical Engineering, Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02142, USA
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18
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A Novel Gd-DTPA-conjugated Poly(L-γ-glutamyl-glutamine)-paclitaxel Polymeric Delivery System for Tumor Theranostics. Sci Rep 2017. [PMID: 28630436 PMCID: PMC5476566 DOI: 10.1038/s41598-017-03633-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The conventional chemotherapeutics could not be traced in vivo and provide timely feedback on the clinical effectiveness of drugs. In this study, poly(L-γ-glutamyl-glutamine)-paclitaxel (PGG-PTX), as a model polymer, was chemically conjugated with Gd-DTPA (Gd-diethylenetriaminepentaacetic acid), a T1-contrast agent of MRI, to prepare a Gd-DTPA-conjugated PGG-PTX (PGG-PTX-DTPA-Gd) delivery system used for tumor theranostics. PGG-PTX-DTPA-Gd can be self-assembled to NPs in water with a z-average hydrodynamic diameter about 35.9 nm. The 3 T MRI results confirmed that the relaxivity of PGG-PTX-DTPA-Gd NPs (r1 = 18.98 mM−1S−1) was increased nearly 4.9 times compared with that of free Gd-DTPA (r1 = 3.87 mM−1S−1). The in vivo fluorescence imaging results showed that PGG-PTX-DTPA-Gd NPs could be accumulated in the tumor tissue of NCI-H460 lung cancer animal model by EPR effect, which was similar to PGG-PTX NPs. The MRI results showed that compared with free Gd-DTPA, PGG-PTX-DTPA-Gd NPs showed significantly enhanced and prolonged signal intensity in tumor tissue, which should be attributed to the increased relaxivity and tumor accumulation. PGG-PTX-DTPA-Gd NPs also showed effective antitumor effect in vivo. These results indicated that PGG-PTX-DTPA-Gd NPs are an effective delivery system for tumor theranostics, and should have a potential value in personalized treatment of tumor.
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19
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Bazban-Shotorbani S, Hasani-Sadrabadi MM, Karkhaneh A, Serpooshan V, Jacob KI, Moshaverinia A, Mahmoudi M. Revisiting structure-property relationship of pH-responsive polymers for drug delivery applications. J Control Release 2017; 253:46-63. [DOI: 10.1016/j.jconrel.2017.02.021] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 01/23/2017] [Accepted: 02/19/2017] [Indexed: 12/17/2022]
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20
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Li J, Zeng J, Jia X, Liu L, Zhou T, Liu P. pH, temperature and reduction multi-responsive polymeric microspheres as drug delivery system for anti-tumor drug: Effect of middle hollow layer between pH and reduction dual-responsive cores and temperature sensitive shells. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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21
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Gao L, Gao L, Fan M, Li Q, Jin J, Wang J, Lu W, Yu L, Yan Z, Wang Y. Hydrotropic polymer-based paclitaxel-loaded self-assembled nanoparticles: preparation and biological evaluation. RSC Adv 2017. [DOI: 10.1039/c7ra04563h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hydrotropic polymer-based paclitaxel-loaded self-assembled nanoparticles: preparation and biological evaluation.
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22
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Hong SS, Choi JY, Kim JO, Lee MK, Kim SH, Lim SJ. Development of paclitaxel-loaded liposomal nanocarrier stabilized by triglyceride incorporation. Int J Nanomedicine 2016; 11:4465-4477. [PMID: 27660440 PMCID: PMC5019274 DOI: 10.2147/ijn.s113723] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Studies have highlighted the challenge of developing injectable liposomes as a paclitaxel (PTX) carrier, a challenge attributable to the limitations in liposomal stability caused by PTX loading. Poor stability of PTX-loaded liposomes is caused by PTX-triggered aggregation or fusion of liposomal membranes and is exacerbated in the presence of PEGylated lipid. In the present study, the effect of triglyceride incorporation on the stability of PTX-loaded/PEGylated liposomes was explored. Incorporation of a medium chain triglyceride Captex 300 into saturated phosphatidylcholine (PC)-based liposomes (1,2-dimyristoyl-sn-glycero-3-phosphocholine [DMPC]:cholesterol [CHOL]:N-(Carbonyl-methoxypolyethyleneglycol 2000)-1, 2-distearoyl-sn-glycero-3-phospho-ethanolamine [PE-PEG]), produced a fine, homogeneous, and membrane-filterable PTX-loaded liposomes fulfilling the requirement of an injectable lipid formulation. Triglyceride incorporation also greatly inhibited the time-dependent leakage of PTX from saturated PC-based liposomes, which appears to be mediated by the inhibition of liposome fusion. In contrast, triglyceride incorporation induced the destabilization and PTX leakage of unsaturated PC-based liposomes, indicating the opposite effect of triglyceride depending on the fluidity status of PC constituting the liposomal membrane. PTX release profile and the in vitro and in vivo anticancer efficacy of triglyceride-incorporated DMPC:CHOL:PE-PEG liposomes were similar to Taxol® while the toxicity of liposomal PTX was significantly lower than that of Taxol. Taken together, triglyceride incorporation provided an injectable PTX formulation by functioning as a formulation stabilizer of PEGylated/saturated PC-based liposomes.
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Affiliation(s)
- Soon-Seok Hong
- Department of Bioscience and Bioengineering, Sejong University, Seoul
| | - Ju Yeon Choi
- College of Pharmacy, Yeungnam University, Gyeongsan
| | - Jong Oh Kim
- College of Pharmacy, Yeungnam University, Gyeongsan
| | - Mi-Kyung Lee
- College of Pharmacy, Woosuk University, Wanju-gun, Jeollabuk-do
| | - So Hee Kim
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology, Ajou University, Suwon, Republic of Korea
| | - Soo-Jeong Lim
- Department of Bioscience and Bioengineering, Sejong University, Seoul
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23
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Yang X, Fan R, Wang W, Wang J, Le Y. Design and synthesis of pH-sensitive polymeric micelles for oral delivery of poorly water-soluble drugs. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:1341-53. [PMID: 27342342 DOI: 10.1080/09205063.2016.1200248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
pH-sensitive polymer poly (polylactide-co-methacrylic acid)-b-poly (acrylic acid) was synthesized using atom transfer radical polymerization and ring-opening polymerization and characterized by gel permeation chromatography and (1)H NMR. The polymers can self-assemble to form micelles in aqueous medium, which respond rapidly to pH change within the gastrointestinal relevant pH range. Critical micelle concentrations and pH response behavior of the polymeric micelle were investigated. Water-insoluble drug nifedipine was loaded and the drug-loading content can be controlled by tuning the composition of the polymers. The in vitro release studies indicate pH sensitivity enabled rapid drug release at the environment of simulated intestinal fluid (pH 7.36), the cumulative released amount of NFD reached more than 80% within 24 h, while only 35% in the simulated gastric fluid (pH 1.35). All the results showed that the pH-sensitive P(PLAMA-co-MAA)-b-PAA micelle may be a prospective candidate as oral drug delivery carrier for hydrophobic drugs with controlled release behavior.
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Affiliation(s)
- Xiaolan Yang
- a State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing , People's Republic of China
| | - Rongrong Fan
- a State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing , People's Republic of China
| | - Wenlong Wang
- a State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing , People's Republic of China
| | - Jiexin Wang
- a State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing , People's Republic of China
| | - Yuan Le
- a State Key Laboratory of Organic-Inorganic Composites , Beijing University of Chemical Technology , Beijing , People's Republic of China
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24
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Teo PY, Cheng W, Hedrick JL, Yang YY. Co-delivery of drugs and plasmid DNA for cancer therapy. Adv Drug Deliv Rev 2016; 98:41-63. [PMID: 26529199 DOI: 10.1016/j.addr.2015.10.014] [Citation(s) in RCA: 157] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/21/2015] [Accepted: 10/23/2015] [Indexed: 12/12/2022]
Abstract
Cancer is an extremely complex disease involving multiple signaling pathways that enable tumor cells to evade programmed cell death, thus making cancer treatment extremely challenging. The use of combination therapy involving both gene therapy and chemotherapy has resulted in enhanced anti-cancer effects and has become an increasingly important strategy in medicine. This review will cover important design parameters that are incorporated into delivery systems for the co-administration of drug and plasmid-based nucleic acids (pDNA and shRNA), with particular emphasis on polymers as delivery materials. The unique challenges faced by co-delivery systems and the strategies to overcome such barriers will be discussed. In addition, the advantages and disadvantages of combination therapy using separate carrier systems versus the use of a single carrier will be evaluated. Finally, future perspectives in the design of novel platforms for the combined delivery of drugs and genes will be presented.
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25
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Cai G, Mao C. A facile way to fabricate pH-sensitive charge-conversion polymeric nanoparticles with tunable pH conversion point. RSC Adv 2016. [DOI: 10.1039/c6ra05825f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
pH-Sensitive charge-conversion polymeric nanoparticles could significantly enhance drug bioavailability due to improved tumor cell internalization.
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Affiliation(s)
- Guoqiang Cai
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Congxing Mao
- MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
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26
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Zhao ZM, Wang Y, Han J, Zhu HD, An L. Preparation and characterization of amphiphilic calixarene nanoparticles as delivery carriers for paclitaxel. Chem Pharm Bull (Tokyo) 2015; 63:180-6. [PMID: 25757488 DOI: 10.1248/cpb.c14-00699] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two types of amphoteric calix[n]arene carboxylic acid (CnCA) derivative, i.e., calix[6]arene hexa-carboxylic acid (C6HCA) and calix[8]arene octo-carboxylic acid (C8OCA), were synthesized by introducing acetoxyls into the hydroxyls of calix[n]arene (n=6, 8). C6HCA and C8OCA nanoparticles (NPs) were prepared successfully using the dialysis method. CnCA NPs had regular spherical shapes with an average diameter of 180-220 nm and possessed negative charges of greater than -30 mV. C6HCA and C8OCA NPs were stable in 4.5% bovine serum albumin solutions and buffers (pH 5-9), with a low critical aggregation concentration value of 5.7 mg·L(-1) and 4.0 mg·L(-1), respectively. C6HCA and C8OCA NPs exhibited good paclitaxel (PTX) loading capacity, with drug loading contents of 7.5% and 8.3%, respectively. The overall in vitro release behavior of PTX from the CnCA NPs was sustained, and C8OCA NPs had a slower release rate compared with C6HCA NPs. These favorable properties of CnCA NPs make them promising nanocarriers for tumor-targeted drug delivery.
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Affiliation(s)
- Zi-Ming Zhao
- Department of Pharmacy, Xuzhou Medical College; Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical College, 209 Tongshan Road 221004, P. R. China
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27
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Chaudhary J, Lakhawat S, Pathak AN. Elucidation on enhanced application of synthesised kojic acid immobilised magnetic and chitosan tri‐polyphosphate nanoparticles as antibacterial agents. IET Nanobiotechnol 2015; 9:375-80. [DOI: 10.1049/iet-nbt.2014.0077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Jignesh Chaudhary
- Amity Institute of BiotechnologyAmity University RajasthanNH‐11C, Kant KalwarJaipur303002RajasthanIndia
| | - Sudarshan Lakhawat
- Amity Institute of BiotechnologyAmity University RajasthanNH‐11C, Kant KalwarJaipur303002RajasthanIndia
| | - Amrendra Nath Pathak
- Amity Institute of BiotechnologyAmity University RajasthanNH‐11C, Kant KalwarJaipur303002RajasthanIndia
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28
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Yuan S, Chen J, Sheng J, Hu Y, Jiang Z. Paclitaxel-Loaded β
-Cyclodextrin-Modified Poly(Acrylic Acid) Nanoparticles through Multivalent Inclusion for Anticancer Therapy. Macromol Biosci 2015; 16:341-9. [DOI: 10.1002/mabi.201500302] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 10/09/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Shanmei Yuan
- Institute of Materials Engineering; National Laboratory of Solid State Microstructure; College of Engineering and Applied Sciences; Nanjing University; Nanjing 210093 P.R. China
| | - Jiao Chen
- Institute of Materials Engineering; National Laboratory of Solid State Microstructure; College of Engineering and Applied Sciences; Nanjing University; Nanjing 210093 P.R. China
| | - Jie Sheng
- School of Electronic and Information Engineering; Yili Normal University; Yining 835000 P.R. China
| | - Yong Hu
- Institute of Materials Engineering; National Laboratory of Solid State Microstructure; College of Engineering and Applied Sciences; Nanjing University; Nanjing 210093 P.R. China
| | - Zhongying Jiang
- School of Electronic and Information Engineering; Yili Normal University; Yining 835000 P.R. China
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29
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Ngwuluka NC, Choonara YE, Kumar P, du Toit LC, Modi G, Pillay V. An optimized gastroretentive nanosystem for the delivery of levodopa. Int J Pharm 2015; 494:49-65. [DOI: 10.1016/j.ijpharm.2015.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 08/03/2015] [Accepted: 08/05/2015] [Indexed: 12/15/2022]
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30
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Gothwal A, Khan I, Gupta U. Polymeric Micelles: Recent Advancements in the Delivery of Anticancer Drugs. Pharm Res 2015. [PMID: 26381278 DOI: 10.1007/s11095‐015‐1784‐1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nanotechnology, in health and medicine, extensively improves the safety and efficacy of different therapeutic agents, particularly the aspects related to drug delivery and targeting. Among various nano-carriers, polymer based macromolecular approaches have resulted in improved drug delivery for the diseases like cancers, diabetes, autoimmune disorders and many more. Polymeric micelles consisting of hydrophilic exterior and hydrophobic core have established a record of anticancer drug delivery from the laboratory to commercial reality. The nanometric size, tailor made functionality, multiple choices of polymeric micelle synthesis and stability are the unique properties, which have attracted scientists and researchers around the world to work upon in this opportunistic drug carrier. The capability of polymeric micelles as nano-carriers are nowhere less significant than nanoparticles, liposomes and other nanocarriers, as per as the commercial feasibility and presence is concerned. In fact polymeric micelles are among the most extensively studied delivery platforms for the effective treatment of different cancers as well as non-cancerous disorders. The present review highlights the sequential and recent developments in the design, synthesis, characterization and evaluation of polymeric micelles to achieve the effective anticancer drug delivery. The future possibilities and clinical outcome have also been discussed, briefly.
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Affiliation(s)
- Avinash Gothwal
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India
| | - Iliyas Khan
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India
| | - Umesh Gupta
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India.
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31
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Gothwal A, Khan I, Gupta U. Polymeric Micelles: Recent Advancements in the Delivery of Anticancer Drugs. Pharm Res 2015; 33:18-39. [PMID: 26381278 DOI: 10.1007/s11095-015-1784-1] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 08/24/2015] [Indexed: 12/24/2022]
Abstract
Nanotechnology, in health and medicine, extensively improves the safety and efficacy of different therapeutic agents, particularly the aspects related to drug delivery and targeting. Among various nano-carriers, polymer based macromolecular approaches have resulted in improved drug delivery for the diseases like cancers, diabetes, autoimmune disorders and many more. Polymeric micelles consisting of hydrophilic exterior and hydrophobic core have established a record of anticancer drug delivery from the laboratory to commercial reality. The nanometric size, tailor made functionality, multiple choices of polymeric micelle synthesis and stability are the unique properties, which have attracted scientists and researchers around the world to work upon in this opportunistic drug carrier. The capability of polymeric micelles as nano-carriers are nowhere less significant than nanoparticles, liposomes and other nanocarriers, as per as the commercial feasibility and presence is concerned. In fact polymeric micelles are among the most extensively studied delivery platforms for the effective treatment of different cancers as well as non-cancerous disorders. The present review highlights the sequential and recent developments in the design, synthesis, characterization and evaluation of polymeric micelles to achieve the effective anticancer drug delivery. The future possibilities and clinical outcome have also been discussed, briefly.
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Affiliation(s)
- Avinash Gothwal
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India
| | - Iliyas Khan
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India
| | - Umesh Gupta
- Department of Pharmacy, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, Ajmer, Rajasthan, 305817, India.
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Cytotoxic and antiangiogenic paclitaxel solubilized and permeation-enhanced by natural product nanoparticles. Anticancer Drugs 2015; 26:167-79. [PMID: 25243454 DOI: 10.1097/cad.0000000000000173] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Paclitaxel (PTX) is one of the most potent intravenous chemotherapeutic agents to date, yet an oral formulation has been problematic because of its low solubility and permeability. Using the recently discovered solubilizing properties of rubusoside (RUB), we investigated the unique PTX-RUB formulation. PTX was solubilized by RUB in water to levels of 1.6-6.3 mg/ml at 10-40% weight/volume. These nanomicellar PTX-RUB complexes were dried to a powder, which was subsequently reconstituted in physiologic solutions. After 2.5 h, 85-99% of PTX-RUB remained soluble in gastric fluid, whereas 79-96% remained soluble in intestinal fluid. The solubilization of PTX was mechanized by the formation of water-soluble spherical nanomicelles between PTX and RUB, with an average diameter of 6.6 nm. Compared with Taxol, PTX-RUB nanoparticles were nearly four times more permeable in Caco-2 cell monocultures. In a side-by-side comparison with dimethyl sulfoxide-solubilized PTX, PTX-RUB maintained the same level of cytotoxicity against three human cancer cell lines with IC50 values ranging from 4 to 20 nmol/l. In addition, tubule formation and migration of human umbilical vein endothelial cells were inhibited at levels as low as 5 nmol/l. These chemical and biological properties demonstrated by the PTX-RUB nanoparticles may improve oral bioavailability and enable further pharmacokinetic, toxicologic, and efficacy investigations.
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Xu JW, Xu F, Luo YL. Core crosslinked H-type poly(methacrylic acid)-block-hydroxyl terminated polybutadiene-block-poly(methacrylic acid) four-armed star block copolymer micelles for intercellular drug release. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515578871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
H-type four-armed star block copolymers with hydroxyl-terminated polybutadiene as hydrophobic sections and poly(methacrylic acid) as hydrophilic fragments were synthesized through atom transform radical polymerization and the follow-up acidolysis, named PMAA2- b-HTPB- b-PMAA2. The core crosslinking reaction was conducted by ultraviolet light irradiation. 1H nuclear magnetic resonance, Fourier transform infrared, size exclusion chromatography, and thermal gravimetric analysis were adopted to confirm the chemical structure of the resulting copolymers. The effect of the ultraviolet light crosslinking on the physicochemical properties of the block copolymer micelles was investigated by fluorescent spectrometry, ultraviolet transmittance, dynamic light scattering, and transmission electron microscope measurements. The results showed that the crosslinking resulted in formation of the stable copolymer micelles and change in the physicochemical parameters, for example, lower critical micelle concentration and smaller micellar size than the uncrosslinked one. Drug loading and in vitro drug release disclosed that the crosslinked copolymer micelles had enhanced drug loading capacity and encapsulation efficiency, less drug leakage, and thus smaller harm to the normal cells but better therapy effect than the uncrosslinked counterpart by the aid of the pH-induced paclitaxel release. The copolymer micelles exhibited pH-dependent cytotoxicity, and therefore, they might be a promising drug target release carrier in biomedical applications.
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Affiliation(s)
- Jing-Wen Xu
- Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, P.R. China
| | - Feng Xu
- Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, P.R. China
| | - Yan-Ling Luo
- Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, P.R. China
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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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Wu W, Zhang C, Lin W, Chen Q, Guo X, Qian Y, Zhang L. Quantitative structure-property relationship (QSPR) modeling of drug-loaded polymeric micelles via genetic function approximation. PLoS One 2015; 10:e0119575. [PMID: 25780923 PMCID: PMC4364361 DOI: 10.1371/journal.pone.0119575] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 01/30/2015] [Indexed: 12/24/2022] Open
Abstract
Self-assembled nano-micelles of amphiphilic polymers represent a novel anticancer drug delivery system. However, their full clinical utilization remains challenging because the quantitative structure-property relationship (QSPR) between the polymer structure and the efficacy of micelles as a drug carrier is poorly understood. Here, we developed a series of QSPR models to account for the drug loading capacity of polymeric micelles using the genetic function approximation (GFA) algorithm. These models were further evaluated by internal and external validation and a Y-randomization test in terms of stability and generalization, yielding an optimization model that is applicable to an expanded materials regime. As confirmed by experimental data, the relationship between microstructure and drug loading capacity can be well-simulated, suggesting that our models are readily applicable to the quantitative evaluation of the drug-loading capacity of polymeric micelles. Our work may offer a pathway to the design of formulation experiments.
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Affiliation(s)
- Wensheng Wu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
- School of Chemistry and Chemical Engineering, Zhaoqing University, Zhaoqing, P. R. China
| | - Canyang Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Wenjing Lin
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Quan Chen
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Xindong Guo
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Yu Qian
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Lijuan Zhang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
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Shanmugam S, Im HT, Sohn YT, Kim YI, Park JH, Park ES, Woo JS. Enhanced oral bioavailability of paclitaxel by solid dispersion granulation. Drug Dev Ind Pharm 2015; 41:1864-76. [DOI: 10.3109/03639045.2015.1018275] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kaur S, Prasad C, Balakrishnan B, Banerjee R. Trigger responsive polymeric nanocarriers for cancer therapy. Biomater Sci 2015. [PMID: 26221933 DOI: 10.1039/c5bm00002e] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Conventional chemotherapy for the treatment of cancer has limited specificity when administered systemically and is often associated with toxicity issues. Enhanced accumulation of polymeric nanocarriers at a tumor site may be achieved by passive and active targeting. Incorporation of trigger responsiveness into these polymeric nanocarriers improves the anticancer efficacy of such systems by modulating the release of the drug according to the tumor environment. Triggers used for tumor targeting include internal triggers such as pH, redox and enzymes and external triggers such as temperature, magnetic field, ultrasound and light. While internal triggers are specific cues of the tumor microenvironment, external triggers are those which are applied externally to control the release. This review highlights the various strategies employed for the preparation of such trigger responsive polymeric nanocarriers for cancer therapy and provides an overview of the state of the art in this field.
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Affiliation(s)
- Shahdeep Kaur
- Nanomedicine Laboratory, Department of Biosciences & Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, India.
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Cysteine modified and bile salt based micelles: preparation and application as an oral delivery system for paclitaxel. Colloids Surf B Biointerfaces 2015; 128:165-171. [PMID: 25747310 DOI: 10.1016/j.colsurfb.2015.02.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 02/11/2015] [Accepted: 02/13/2015] [Indexed: 11/22/2022]
Abstract
The aim of the present study is to construct a cysteine modified polyion complex micelles made of Pluronic F127-chitosan (PF127-CS), Pluronic F127-cysteine (PF127-cysteine) and sodium cholate (NaC) and to evaluate the potential of the micelles as an oral drug delivery system for paclitaxel. Systematic studies on physicochemical properties including size distribution, zeta-potential and morphology were conducted to validate the formation of micelle structure. Compared with Pluronic micelles, drug-loading capacity of PF127-CS/PF127-cysteine/NaC micelles was increased from 3.35% to 12.77%. Both the critical micelle concentration and the stability test confirmed that the PF127-CS/PF127-cysteine/NaC micelles were more stable in aqueous solution than sodium cholate micelles. Pharmacokinetic study demonstrated that when oral administration the area under the plasma concentration-time curve (AUC0-∞) and the absolute bioavailability of paclitaxel-loaded micelles were five times greater than that of the paclitaxel solution. In general, PF127-CS/PF127-cysteine/NaC micelles were proven to be a potential oral drug delivery system for paclitaxel.
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Woraphatphadung T, Sajomsang W, Gonil P, Saesoo S, Opanasopit P. Synthesis and characterization of pH-responsive N-naphthyl-N,O-succinyl chitosan micelles for oral meloxicam delivery. Carbohydr Polym 2015; 121:99-106. [PMID: 25659677 DOI: 10.1016/j.carbpol.2014.12.039] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/06/2014] [Accepted: 12/09/2014] [Indexed: 11/19/2022]
Abstract
The aim of this study was to synthesize pH responsive chitosan and to evaluate the influence of drug-loaded micelle methods on loading efficiency, particle size and micelle stability. N-naphthyl-N,O-succinyl chitosan (NSCS) was successfully synthesized and meloxicam (MX) was loaded into the inner core of the NSCS micelles by physical entrapment methods (dialysis, O/W emulsion, dropping and evaporation) with a regular spherical shape (particle size 84-382nm). MX-loaded micelles by evaporation method showed the highest entrapment efficiency. The stability of the drug-loaded micelles depended on not only the methods but also the initial of drug. NSCS micelles are less toxic on Caco-2 cells. In acidic medium at 0-2h, percentage cumulative release of MX from MX-loaded micelles was similar to free drug. When the pH was adjusted to pH 6.8, the MX release was increased significantly. Therefore, this NSCS micelle would be desirable to develop MX carrier for oral drug delivery.
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Affiliation(s)
- Thisirak Woraphatphadung
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand
| | - Warayuth Sajomsang
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani 12120, Thailand.
| | - Pattarapond Gonil
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani 12120, Thailand
| | - Somsak Saesoo
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani 12120, Thailand
| | - Praneet Opanasopit
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.
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Ahn DG, Lee J, Park SY, Kwark YJ, Lee KY. Doxorubicin-loaded alginate-g-poly(N-isopropylacrylamide) micelles for cancer imaging and therapy. ACS APPLIED MATERIALS & INTERFACES 2014; 6:22069-22077. [PMID: 25487046 DOI: 10.1021/am505444c] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Chemotherapy is a widely adopted method for the treatment of cancer. However, its use is often limited due to side effects produced by anti-cancer drugs. Therefore, various drug carriers, including polymeric micelles, have been investigated to find a method to overcome this limitation. In this study, alginate-based, self-assembled polymeric micelles were designed and prepared using alginate-g-poly(N-isopropylacrylamide) (PNIPAAm). Amino-PNIPAAm was chemically introduced to the alginate backbone via carbodiimide chemistry. The resulting polymer was dissolved in distilled water at room temperature and formed self-assembled micelles at 37 °C. Characteristics of alginate-g-PNIPAAm micelles were dependent on the molecular weight of PNIPAAm, the degree of substitution, and the polymer concentration. Doxorubicin (DOX), a model anti-cancer drug, was efficiently encapsulated in alginate-g-PNIPAAm micelles, and sustained release of DOX from the micelles was achieved at 37 °C in vitro. These micelles accumulated at the tumor site of a tumor-bearing mouse model as a result of the enhanced permeability and retention effect. Interestingly, DOX-loaded alginate-g-PNIPAAm micelles showed excellent anti-cancer therapeutic efficacy in a mouse model without any significant side effects. This approach to designing and tailoring natural polymer-based systems to fabricate nanoparticles at human body temperature may provide a useful means for cancer imaging and therapy.
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Affiliation(s)
- Dong-Gyun Ahn
- Department of Bioengineering, Hanyang University , Seoul 133-791, Republic of Korea
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Simões SMN, Figueiras AR, Veiga F, Concheiro A, Alvarez-Lorenzo C. Polymeric micelles for oral drug administration enabling locoregional and systemic treatments. Expert Opin Drug Deliv 2014; 12:297-318. [PMID: 25227130 DOI: 10.1517/17425247.2015.960841] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Amphiphilic block copolymers are recognized components of parenteral drug nanocarriers. However, their performance in oral administration has barely been evaluated to any great extent. AREAS COVERED This review provides an overview of the methods used to prepare drug-loaded polymeric micelles and to evaluate their stability in gastrointestinal (GI) fluids, and then analyzes in detail recent in vitro and in vivo results about their performance in oral drug delivery. Oral administration of polymeric micelles has been tested for a variety of therapeutic purposes, namely, to increase apparent drug solubility in the GI fluids and facilitate absorption, to penetrate in pathological regions of the GI tract for locoregional treatment, to carry the drug directly toward the blood stream minimizing presystemic loses, and to target the drug after oral absorption to specific tissue or cells in the body. EXPERT OPINION Each therapeutic purpose demands micelles with different performance regarding stability in the GI tract, ability to overcome physiological barriers and drug release patterns. Depending on the block copolymer composition and structure, a wealth of self-assembled micelles with different morphologies and stability can be prepared. Moreover, copolymer unimers can play a role in improving drug absorption through the GI mucosa, either by increasing membrane permeability to the drug and/or the carrier or by inhibiting drug efflux transporters or first-pass metabolism. Therefore, polymeric micelles can be pointed out as versatile vehicles to increase oral bioavailability of drugs that exhibit poor solubility or permeability and may even be an alternative to parenteral carriers when targeting is pursued.
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Affiliation(s)
- Susana M N Simões
- University of Coimbra, Faculty of Pharmacy , Coimbra , Portugal +351 239 855099 ;
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Yang YH, Ding PT. Study on the preparation of nifedipine-loaded oral copolymer micelles and its pharmacokinetics in rats. Cell Biochem Biophys 2014; 71:155-60. [PMID: 25151141 DOI: 10.1007/s12013-014-0178-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The objective of this paper was to prepare nifedipine-loaded oral copolymer micelles and to improve bioavailability of hydrophobic drugs. The methoxy poly(ethylene glycol)-b-polycaprolactone diblock copolymer (mPEG-b-PCL) we developed was the research object; solvent evaporation method was utilized to prepare nifedipine-loaded copolymer micelles, and the drug concentration, drug-loaded amount, and entrapment efficiency were also determined. Transmission electron microscopy and dynamic light scattering were used to characterize the morphology and size distributions of micelles, and the in vivo pharmacokinetics were studied in rats with the research objects of nifedipine-loaded oral copolymer micelles. The drug concentration, drug-loaded amount, and entrapment efficiency of mPEG-b-PCL-nifedipine micelles were (69.39 ± 4.33) μg mL(-1), (3.35 ± 0.21)%, and (8.67 ± 0.54)%, respectively. The micelles were globular shaped with a narrow size distribution and a mean diameter of (34.8 ± 3.2) nm, and the relative bioavailability of the micelles we developed was 246.20% when compared with the tablets available in the market. The mPEG-b-PCL-nifedipine oral copolymer micelles can improve the bioavailability of hydrophobic drugs. Oral polymer micelles drug delivery system has a good prospect.
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Affiliation(s)
- Yue-Hui Yang
- Department of Pharmaceutical, Shengjing Hospital of China Medical University, 36 Sanhao Road, Heping District, Shenyang, 110004, Liaoning, China,
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Bersani S, Vila-Caballer M, Brazzale C, Barattin M, Salmaso S. pH-sensitive stearoyl-PEG-poly(methacryloyl sulfadimethoxine) decorated liposomes for the delivery of gemcitabine to cancer cells. Eur J Pharm Biopharm 2014; 88:670-82. [PMID: 25157908 DOI: 10.1016/j.ejpb.2014.08.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 08/07/2014] [Accepted: 08/11/2014] [Indexed: 12/12/2022]
Abstract
Novel, acid-sensitive liposomes that respond to physiopathological pH for tumour targeting applications were obtained by surface decoration with 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)] (mPEG-DSPE) and stearoyl-poly(ethylene glycol)-poly(methacryloyl sulfadimethoxine) copolymer (stearoyl-PEG-polySDM). The pH-sensitive stearoyl-PEG-polySDM copolymer contained an average of seven methacryloyl sulfadimethoxines per molecule and was found to possess an apparent pKa of 7.2. Preliminary cloud point studies showed that the hydrophilic/hydrophobic copolymer conversion occurred at pH 7.0. The copolymer was soluble above pH 7.0 and underwent aggregation at lower pH. Liposome formulations were prepared with 0.2:0.6:100, 0.5:1.5:100 and 1:3:100 mPEG-DSPE/stearoyl-PEG-polySDM/lipids molar ratios. All of the liposome formulations were stable at pH 7.4, even in the presence of foetal bovine serum, but they underwent rapid size increase at pH 6.5. TEM analysis showed that, at pH 6.5, the formulations coated with a stearoyl-PEG-polySDM/lipids molar ratio greater than 1:100 underwent aggregation. At pH 7.4, the liposomes showed negative zeta potential that significantly decreased after incubation at pH 6.5. Cell-culture studies indicated that the liposomes were not toxic up to 10mg/mL. Fluorescence spectroscopy, cytofluorimetry and confocal microscopy showed that at pH 6.5, the incubation of MCF-7 tumour cells with fluorescein-labelled 1:3:100 mPEG-DSPE/stearoyl-PEG-polySDM/lipids molar ratio liposomes resulted in time-dependent cell association, while at pH 7.4 the cell interaction was significantly lower. The same pH-responsive liposome formulation loaded with gemcitabine (98.2±4.7nmol gemcitabine/lipid μmol loading capacity) was stable at pH 7.4 for several hours, while at pH 6.5 it rapidly aggregated. At pH 6.5, these liposomes displayed higher cytotoxicity than at pH 7.4 or compared to non-responsive control liposomes at both incubation pH. Notably, treatment with free gemcitabine did not yield cytotoxic effects, indicating that the carrier can efficiently deliver the anticancer drug to the cytosolic compartment.
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Affiliation(s)
- Sara Bersani
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | | | - Chiara Brazzale
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Michela Barattin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Stefano Salmaso
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy.
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Parekh G, Pattekari P, Joshi C, Shutava T, DeCoster M, Levchenko T, Torchilin V, Lvov Y. Layer-by-layer nanoencapsulation of camptothecin with improved activity. Int J Pharm 2014; 465:218-27. [PMID: 24508806 PMCID: PMC4015802 DOI: 10.1016/j.ijpharm.2014.01.041] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/27/2013] [Accepted: 01/29/2014] [Indexed: 11/23/2022]
Abstract
160 nm nanocapsules containing up to 60% of camptothecin in the core and 7-8 polyelectrolyte bilayers in the shell were produced by washless layer-by-layer assembly of heparin and block-copolymer of poly-l-lysine and polyethylene glycol. The outer surface of the nanocapsules was additionally modified with polyethylene glycol of 5 kDa or 20 kDa molecular weight to attain protein resistant properties, colloidal stability in serum and prolonged release of the drug from the capsules. An advantage of the LbL coated capsules is the preservation of camptothecin lactone form with the shell assembly starting at acidic pH and improved chemical stability of encapsulated drug at neutral and basic pH, especially in the presence of albumin that makes such formulation more active than free camptothecin. LbL nanocapsules preserve the camptothecin lactone form at pH 7.4 resulting in triple activity of the drug toward CRL2303 glioblastoma cell.
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Affiliation(s)
- Gaurav Parekh
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA
| | - Pravin Pattekari
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA
| | - Chaitanya Joshi
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA
| | - Tatsiana Shutava
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA
| | - Mark DeCoster
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA
| | - Tatyana Levchenko
- Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Vladimir Torchilin
- Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Yuri Lvov
- Institute for Micromanufacturing and Biomedical Engineering Program, Louisiana Tech University, USA.
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Dou J, Zhang H, Liu X, Zhang M, Zhai G. Preparation and evaluation in vitro and in vivo of docetaxel loaded mixed micelles for oral administration. Colloids Surf B Biointerfaces 2014; 114:20-7. [DOI: 10.1016/j.colsurfb.2013.09.010] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 09/03/2013] [Accepted: 09/06/2013] [Indexed: 11/29/2022]
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Hussein-Al-Ali SH, El Zowalaty ME, Hussein MZ, Ismail M, Dorniani D, Webster TJ. Novel kojic acid-polymer-based magnetic nanocomposites for medical applications. Int J Nanomedicine 2014; 9:351-62. [PMID: 24453486 PMCID: PMC3890966 DOI: 10.2147/ijn.s53847] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Iron oxide magnetic nanoparticles (MNPs) were synthesized by the coprecipitation of iron salts in sodium hydroxide followed by coating separately with chitosan (CS) and polyethylene glycol (PEG) to form CS-MNPs and PEG-MNPs nanoparticles, respectively. They were then loaded with kojic acid (KA), a pharmacologically bioactive natural compound, to form KA-CS-MNPs and KA-PEG-MNPs nanocomposites, respectively. The MNPs and their nanocomposites were characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, vibrating sample magnetometry, and scanning electron microscopy. The powder X-ray diffraction data suggest that all formulations consisted of highly crystalline, pure magnetite Fe3O4. The Fourier transform infrared spectroscopy and thermogravimetric analysis confirmed the presence of both polymers and KA in the nanocomposites. Magnetization curves showed that both nanocomposites (KA-CS-MNPs and KA-PEG-MNPs) were superparamagnetic with saturation magnetizations of 8.1 emu/g and 26.4 emu/g, respectively. The KA drug loading was estimated using ultraviolet–visible spectroscopy, which gave a loading of 12.2% and 8.3% for the KA-CS-MNPs and KA-PEG-MNPs nanocomposites, respectively. The release profile of the KA from the nanocomposites followed a pseudo second-order kinetic model. The agar diffusion test was performed to evaluate the antimicrobial activity for both KA-CS-MNPs and KA-PEG-MNPs nanocomposites against a number of microorganisms using two Gram-positive (methicillin-resistant Staphylococcus aureus and Bacillus subtilis) and one Gram-negative (Salmonella enterica) species, and showed some antibacterial activity, which could be enhanced in future studies by optimizing drug loading. This study provided evidence for the promise for the further investigation of the possible beneficial biological activities of KA and both KA-CS-MNPs and KA-PEG-MNPs nanocomposites in nanopharmaceutical applications.
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Affiliation(s)
| | - Mohamed Ezzat El Zowalaty
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Serdang, Selangor, Malaysia ; Faculty of Public Health and Tropical Medicine, Jazan University, Jazan, Saudi Arabia
| | - Mohd Zobir Hussein
- Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Serdang, Selangor, Malaysia
| | - Maznah Ismail
- Laboratory of Molecular Biomedicine, Institute of Bioscience, Serdang, Selangor, Malaysia ; Department of Nutrition and Dietetics, Faculty of Medicine and Health Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - Dena Dorniani
- Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Serdang, Selangor, Malaysia
| | - Thomas J Webster
- Department of Chemical Engineering and Program in Bioengineering, Northeastern University, Boston, MA, USA ; Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
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47
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Yang YQ, Zhao B, Li ZD, Lin WJ, Zhang CY, Guo XD, Wang JF, Zhang LJ. pH-sensitive micelles self-assembled from multi-arm star triblock co-polymers poly(ε-caprolactone)-b-poly(2-(diethylamino)ethyl methacrylate)-b-poly(poly(ethylene glycol) methyl ether methacrylate) for controlled anticancer drug delivery. Acta Biomater 2013; 9:7679-90. [PMID: 23669619 DOI: 10.1016/j.actbio.2013.05.006] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 04/22/2013] [Accepted: 05/02/2013] [Indexed: 11/19/2022]
Abstract
A series of amphiphilic 4- and 6-armed star triblock co-polymers poly(ε-caprolactone)-b-poly(2-(diethylamino)ethyl methacrylate)-b-poly(poly(ethylene glycol) methyl ether methacrylate) (4/6AS-PCL-b-PDEAEMA-b-PPEGMA) were developed by a combination of ring opening polymerization and continuous activators regenerated by electron transfer atom transfer radical polymerization. The critical micelle concentration values of the star co-polymers in aqueous solution were extremely low (2.2-4.0mgl(-1)), depending on the architecture of the co-polymers. The self-assembled blank and doxorubicin (DOX)-loaded three layer micelles were spherical in shape with an average size of 60-220nm determined by scanning electron microscopy and dynamic light scattering. The in vitro release behavior of DOX from the three layer micelles exhibited pH-dependent properties. The DOX release rate was significantly accelerated by decreasing the pH from 7.4 to 5.0, due to swelling of the micelles at lower pH values caused by the protonation of tertiary amine groups in DEAEMA in the middle layer of the micelles. The in vitro cytotoxicity of DOX-loaded micelles to HepG2 cells suggested that the 4/6AS-PCL-b-PDEAEMA-b-PPEGMA micelles could provide equivalent or even enhanced anticancer activity and bioavailability of DOX and thus a lower dosage is sufficient for the same therapeutic efficacy. The results demonstrate that the pH-sensitive multilayer micelles could have great potential application in delivering hydrophobic anticancer drugs for improved cancer therapy.
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Affiliation(s)
- You Qiang Yang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
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Thanki K, Gangwal RP, Sangamwar AT, Jain S. Oral delivery of anticancer drugs: Challenges and opportunities. J Control Release 2013; 170:15-40. [DOI: 10.1016/j.jconrel.2013.04.020] [Citation(s) in RCA: 330] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 04/25/2013] [Accepted: 04/26/2013] [Indexed: 12/12/2022]
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Zhang P, Cheetham AG, Lin YA, Cui H. Self-assembled Tat nanofibers as effective drug carrier and transporter. ACS NANO 2013; 7:5965-77. [PMID: 23758167 PMCID: PMC3799919 DOI: 10.1021/nn401667z] [Citation(s) in RCA: 149] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Cell penetrating peptides (CPPs) have been extensively explored as molecular vectors through covalent linkage to anticancer drugs to improve the drug's water solubility and to help overcome multidrug resistance. We report here the use of the Tat CPP as a molecular building unit to construct well-defined supramolecular nanofibers that can be utilized as a nanoscale vector to encapsulate the hydrophobic drug paclitaxel (PTX) (loading efficiency: 89.7 ± 5.0%) with a high loading capacity (6.8 ± 0.4%). Notably, our TEM imaging results reveal that nanofibers containing a higher PTX content tend to be more flexible than those with a lower PTX content. Fluorescence and confocal microscopy imaging show that the Tat nanofibers can effectively transport encapsulated molecules into the cells through an adsorptive-mediated endocytosis pathway. Cytotoxicity experiments and flow cytometry measurements demonstrate that PTX loaded in the nanofibers exerts its cytotoxicity against cancer cells by arresting the cells at the G2/M phase, the same working mechanism as free PTX.
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Affiliation(s)
- Pengcheng Zhang
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBio Technology, The Johns Hopkins University, Baltimore, MD 21218, United States
| | - Andrew G. Cheetham
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBio Technology, The Johns Hopkins University, Baltimore, MD 21218, United States
| | - Yi-an Lin
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBio Technology, The Johns Hopkins University, Baltimore, MD 21218, United States
| | - Honggang Cui
- Department of Chemical and Biomolecular Engineering, and Institute for NanoBio Technology, The Johns Hopkins University, Baltimore, MD 21218, United States
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Polymeric micelles, a promising drug delivery system to enhance bioavailability of poorly water-soluble drugs. JOURNAL OF DRUG DELIVERY 2013; 2013:340315. [PMID: 23936656 PMCID: PMC3712247 DOI: 10.1155/2013/340315] [Citation(s) in RCA: 267] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/04/2013] [Accepted: 06/11/2013] [Indexed: 01/27/2023]
Abstract
Oral administration is the most commonly used and readily accepted form of drug delivery; however, it is find that many drugs are difficult to attain enough bioavailability when administered via this route. Polymeric micelles (PMs) can overcome some limitations of the oral delivery acting as carriers able to enhance drug absorption, by providing (1) protection of the loaded drug from the harsh environment of the GI tract, (2) release of the drug in a controlled manner at target sites, (3) prolongation of the residence time in the gut by mucoadhesion, and (4) inhibition of efflux pumps to improve the drug accumulation. To explain the mechanisms for enhancement of oral bioavailability, we discussed the special stability of PMs, the controlled release properties of pH-sensitive PMs, the prolongation of residence time with mucoadhesive PMs, and the P-gp inhibitors commonly used in PMs, respectively. The primary purpose of this paper is to illustrate the potential of PMs for delivery of poorly water-soluble drugs with bioavailability being well maintained.
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