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Kumar N, Ghosh B, Kumar A, Koley R, Dhara S, Chattopadhyay S. Multilayered “SMART” hydrogel systems for on-site drug delivery applications. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.104111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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2
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Kopeček J, Yang J. Polymer nanomedicines. Adv Drug Deliv Rev 2020; 156:40-64. [PMID: 32735811 PMCID: PMC7736172 DOI: 10.1016/j.addr.2020.07.020] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/22/2020] [Accepted: 07/24/2020] [Indexed: 12/12/2022]
Abstract
Polymer nanomedicines (macromolecular therapeutics, polymer-drug conjugates, drug-free macromolecular therapeutics) are a group of biologically active compounds that are characterized by their large molecular weight. This review focuses on bioconjugates of water-soluble macromolecules with low molecular weight drugs and selected proteins. After analyzing the design principles, different structures of polymer carriers are discussed followed by the examination of the efficacy of the conjugates in animal models and challenges for their translation into the clinic. Two innovative directions in macromolecular therapeutics that depend on receptor crosslinking are highlighted: a) Combination chemotherapy of backbone degradable polymer-drug conjugates with immune checkpoint blockade by multivalent polymer peptide antagonists; and b) Drug-free macromolecular therapeutics, a new paradigm in drug delivery.
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Affiliation(s)
- Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA.
| | - Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA
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3
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Geng Y, Zhong Y, Zhou Q, Chen S, Piao Y, Yin W, Lu H, Shen Y. A neutral water-soluble mitochondria-targeting polymer. Chem Commun (Camb) 2019; 55:10015-10018. [PMID: 31378791 DOI: 10.1039/c9cc04291a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report the first neutral and water-soluble polymer capable of strong mitochondrial targeting in vitro and in vivo, zwitterionic poly[2-(N-oxide-N,N-diethylamino)ethyl methacrylate] (OPDEA). OPDEA is quickly internalized via macropinocytosis by various cancer cells and transferred into the mitochondria, which slightly lowers the mitochondrial membrane potential as determined by the JC-1 assay.
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Affiliation(s)
- Yu Geng
- Center for Bionanoengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
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4
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Calik F, Degirmenci A, Eceoglu M, Sanyal A, Sanyal R. Dendron–Polymer Conjugate Based Cross-Linked Micelles: A Robust and Versatile Nanosystem for Targeted Delivery. Bioconjug Chem 2019; 30:1087-1097. [DOI: 10.1021/acs.bioconjchem.9b00027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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5
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Yang J, Li L, Kopeček J. Biorecognition: A key to drug-free macromolecular therapeutics. Biomaterials 2018; 190-191:11-23. [PMID: 30391799 DOI: 10.1016/j.biomaterials.2018.10.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/02/2018] [Accepted: 10/07/2018] [Indexed: 12/13/2022]
Abstract
This review highlights a new paradigm in macromolecular nanomedicine - drug-free macromolecular therapeutics (DFMT). The effectiveness of the new system is based on biorecognition events without the participation of low molecular weight drugs. Apoptosis of cells can be initiated by the biorecognition of complementary peptide/oligonucleotide motifs at the cell surface resulting in the crosslinking of slowly internalizing receptors. B-cell CD20 receptors and Non-Hodgkin lymphoma (NHL) were chosen as the first target. Exposing cells to a conjugate of one motif with a targeting ligand decorates the cells with this motif. Further exposure of decorated cells to a macromolecule (synthetic polymer or human serum albumin) containing multiple copies of the complementary motif as grafts results in receptor crosslinking and apoptosis induction in vitro and in vivo. The review focuses on recent developments and explores the mechanism of action of DFMT. The altered molecular signaling pathways demonstrated the great potential of DFMT to overcome rituximab resistance resulting from either down-regulation of CD20 or endocytosis and trogocytosis of rituximab/CD20 complexes. The suitability of this approach for the treatment of blood borne cancers is confirmed. In addition, the widespread applicability of DFMT as a new concept in macromolecular therapeutics for numerous diseases is exposed.
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Affiliation(s)
- Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA.
| | - Lian Li
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA
| | - Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry, Center for Controlled Chemical Delivery, University of Utah, Salt Lake City, UT 84112, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112, USA
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6
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Kostka L, Etrych T. High-molecular-weight HPMA-based polymer drug carriers for delivery to tumor. Physiol Res 2017; 65:S179-S190. [PMID: 27762584 DOI: 10.33549/physiolres.933420] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
In this work, design and synthesis of high-molecular-weight N-(2-hydroxypropyl)methacrylamide-based polymer drug delivery systems tailored for cancer therapy is summarized. Moreover, the influence of their architecture on tumor accumulation and in vivo anti-cancer efficacy is discussed. Mainly, the high-molecular-weight delivery systems, such as branched, grafted, multi-block, star-like or micellar systems, with molecular weights greater than the renal threshold are discussed and reviewed in detail.
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Affiliation(s)
- L Kostka
- Department of Biomedicinal Polymers, Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic.
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7
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Dar MJ, Ali H, Khan A, Khan GM. Polymer-based drug delivery: the quest for local targeting of inflamed intestinal mucosa. J Drug Target 2017; 25:582-596. [DOI: 10.1080/1061186x.2017.1298601] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- M. Junaid Dar
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Hussain Ali
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Amjad Khan
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Gul Majid Khan
- Department of Pharmacy, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
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8
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Calle D, Yilmaz D, Cerdan S, Kocer A. Drug delivery from engineered organisms and nanocarriers as monitored by multimodal imaging technologies. AIMS BIOENGINEERING 2017. [DOI: 10.3934/bioeng.2017.2.198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Shen T, Xu X, Guo L, Tang H, Diao T, Gan Z, Zhang G, Yu Q. Efficient Tumor Accumulation, Penetration and Tumor Growth Inhibition Achieved by Polymer Therapeutics: The Effect of Polymer Architectures. Biomacromolecules 2016; 18:217-230. [DOI: 10.1021/acs.biomac.6b01533] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tong Shen
- The
State Key Laboratory of Organic−inorganic Composites, Beijing
Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
| | - Xin Xu
- Department
of Urology, China-Japan Friendship Hospital, Beijing, 100029, People’s Republic of China
| | - Linyi Guo
- The
State Key Laboratory of Organic−inorganic Composites, Beijing
Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
| | - Hao Tang
- The
State Key Laboratory of Organic−inorganic Composites, Beijing
Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
| | - Tongxiang Diao
- Department
of Urology, China-Japan Friendship Hospital, Beijing, 100029, People’s Republic of China
| | - Zhihua Gan
- The
State Key Laboratory of Organic−inorganic Composites, Beijing
Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
| | - Guan Zhang
- Department
of Urology, China-Japan Friendship Hospital, Beijing, 100029, People’s Republic of China
| | - Qingsong Yu
- The
State Key Laboratory of Organic−inorganic Composites, Beijing
Laboratory of Biomedical Materials, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China
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10
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Yang J, Kopeček J. Design of smart HPMA copolymer-based nanomedicines. J Control Release 2016; 240:9-23. [DOI: 10.1016/j.jconrel.2015.10.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 09/29/2015] [Accepted: 10/01/2015] [Indexed: 01/13/2023]
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11
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Sumer Bolu B, Manavoglu Gecici E, Sanyal R. Combretastatin A-4 Conjugated Antiangiogenic Micellar Drug Delivery Systems Using Dendron–Polymer Conjugates. Mol Pharm 2016; 13:1482-90. [DOI: 10.1021/acs.molpharmaceut.5b00931] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Burcu Sumer Bolu
- Department
of Chemistry, Bogazici University, Istanbul 34342, Turkey
| | | | - Rana Sanyal
- Department
of Chemistry, Bogazici University, Istanbul 34342, Turkey
- Center
for Life Sciences and Technologies, Bogazici University, Istanbul 34342, Turkey
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12
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Hartley JM, Chu TW, Peterson EM, Zhang R, Yang J, Harris J, Kopeček J. Super-Resolution Imaging and Quantitative Analysis of Membrane Protein/Lipid Raft Clustering Mediated by Cell-Surface Self-Assembly of Hybrid Nanoconjugates. Chembiochem 2015; 16:1725-9. [PMID: 26097072 PMCID: PMC4551445 DOI: 10.1002/cbic.201500278] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Indexed: 11/12/2022]
Abstract
Super-resolution imaging was used to quantify organizational changes in the plasma membrane after treatment with hybrid nanoconjugates. The nanoconjugates crosslinked CD20 on the surface of malignant B cells, thereby inducing apoptosis. Super-resolution images were analyzed by using pair-correlation analysis to determine cluster size and to count the average number of molecules in the clusters. The role of lipid rafts was investigated by pre-treating cells with a cholesterol chelator and actin destabilizer to prevent lipid raft formation. Lipid raft cluster size correlated with apoptosis induction after treatment with the nanoconjugates. Lipid raft clusters had radii of ∼ 200 nm in cells treated with the hybrid nanoconjugates. Super-resolution images provided precise molecule location coordinates that could be used to determine density of bound conjugates, cluster size, and number of molecules per cluster.
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Affiliation(s)
- Jonathan M Hartley
- Department of Bioengineering, University of Utah, 20 S. 2030 E., Room 108, Salt Lake City, UT 84112 (USA)
| | - Te-Wei Chu
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E Room 301, Salt Lake City, UT 84112 (USA)
| | - Eric M Peterson
- Department of Chemistry, University of Utah, 315 S. 1400 E, Room 2020, Salt Lake City, UT 84112 (USA)
| | - Rui Zhang
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E Room 301, Salt Lake City, UT 84112 (USA)
| | - Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E Room 301, Salt Lake City, UT 84112 (USA)
| | - Joel Harris
- Department of Chemistry, University of Utah, 315 S. 1400 E, Room 2020, Salt Lake City, UT 84112 (USA)
| | - Jindřich Kopeček
- Department of Bioengineering, University of Utah, 20 S. 2030 E., Room 108, Salt Lake City, UT 84112 (USA).
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E Room 301, Salt Lake City, UT 84112 (USA).
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13
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Yang J, Kopeček J. Macromolecular therapeutics. J Control Release 2014; 190:288-303. [PMID: 24747162 PMCID: PMC4142088 DOI: 10.1016/j.jconrel.2014.04.013] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 04/04/2014] [Accepted: 04/07/2014] [Indexed: 12/13/2022]
Abstract
This review covers water-soluble polymer-drug conjugates and macromolecules that possess biological activity without attached low molecular weight drugs. The main design principles of traditional and backbone degradable polymer-drug conjugates as well as the development of a new paradigm in nanomedicines - (low molecular weight) drug-free macromolecular therapeutics are discussed. To address the biological features of cancer, macromolecular therapeutics directed to stem/progenitor cells and the tumor microenvironment are deliberated. Finally, the future perspectives of the field are briefly debated.
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Affiliation(s)
- Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City 84112, USA
| | - Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City 84112, USA; Department of Bioengineering, University of Utah, Salt Lake City 84112, USA.
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Sequential combination therapy of ovarian cancer with degradable N-(2-hydroxypropyl)methacrylamide copolymer paclitaxel and gemcitabine conjugates. Proc Natl Acad Sci U S A 2014; 111:12181-6. [PMID: 25092316 DOI: 10.1073/pnas.1406233111] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
For rapid and effective clinical translation, polymer-based anticancer therapeutics need long circulating conjugates that produce a sustained concentration gradient between the vasculature and solid tumor. To this end, we designed second-generation backbone-degradable diblock N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer carriers and evaluated sequential combination therapy of HPMA copolymer-paclitaxel and HPMA copolymer-gemcitabine conjugates against A2780 human ovarian carcinoma xenografts. First, extensive in vitro assessment of administration sequence impact on cell cycle, viability, apoptosis, migration, and invasion revealed that treatment with paclitaxel conjugate followed by gemcitabine conjugate was the most effective scheduling strategy. Second, in an in vivo comparison with first-generation (nondegradable, molecular weight below the renal threshold) conjugates and free drugs, the second-generation degradable high-molecular weight conjugates showed distinct advantages, such as favorable pharmacokinetics (three- to five-times half-life compared with the first generation), dramatically enhanced inhibition of tumor growth (complete tumor regression) by paclitaxel and gemcitabine conjugate combination, and absence of adverse effects. In addition, multimodality imaging studies of dual-labeled model conjugates confirmed the efficacy of second-generation conjugates by visualizing more than five-times enhanced tumor accumulation, rapid conjugate internalization, and effective intracellular release of payload. Taken together, the results indicate that the second-generation degradable HPMA copolymer carrier can provide an ideal platform for the delivery of a range of antitumor compounds, which makes it one of the most attractive candidates for potential clinical application.
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15
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Policianova O, Brus J, Hruby M, Urbanova M. In vitrodissolution study of acetylsalicylic acid solid dispersions. Tunable drug release allowed by the choice of polymer matrix. Pharm Dev Technol 2014; 20:935-940. [DOI: 10.3109/10837450.2014.943407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Policianova O, Brus J, Hruby M, Urbanova M, Zhigunov A, Kredatusova J, Kobera L. Structural diversity of solid dispersions of acetylsalicylic acid as seen by solid-state NMR. Mol Pharm 2014; 11:516-30. [PMID: 24417442 DOI: 10.1021/mp400495h] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Solid dispersions of active pharmaceutical ingredients are of increasing interest due to their versatile use. In the present study polyvinylpyrrolidone (PVP), poly[N-(2-hydroxypropyl)-metacrylamide] (pHPMA), poly(2-ethyl-2-oxazoline) (PEOx), and polyethylene glycol (PEG), each in three Mw, were used to demonstrate structural diversity of solid dispersions. Acetylsalicylic acid (ASA) was used as a model drug. Four distinct types of the solid dispersions of ASA were created using a freeze-drying method: (i) crystalline solid dispersions containing nanocrystalline ASA in a crystalline PEG matrix; (ii) amorphous glass suspensions with large ASA crystallites embedded in amorphous pHPMA; (iii) solid solutions with molecularly dispersed ASA in rigid amorphous PVP; and (iv) nanoheterogeneous solid solutions/suspensions containing nanosized ASA clusters dispersed in a semiflexible matrix of PEOx. The obtained structural data confirmed that the type of solid dispersion can be primarily controlled by the chemical constitutions of the applied polymers, while the molecular weight of the polymers had no detectable impact. The molecular structure of the prepared dispersions was characterized using solid-state NMR, wide-angle X-ray scattering (WAXS), and differential scanning calorimetry (DSC). By applying various (1)H-(13)C and (1)H-(1)H correlation experiments combined with T1((1)H) and T1ρ((1)H) relaxation data, the extent of the molecular mixing was determined over a wide range of distances, from intimate intermolecular contacts (0.1-0.5 nm) up to the phase-separated nanodomains reaching ca. 500 nm. Hydrogen-bond interactions between ASA and polymers were probed by the analysis of (13)C and (15)N CP/MAS NMR spectra combined with the measurements of (1)H-(15)N dipolar profiles. Overall potentialities and limitations of individual experimental techniques were thoroughly evaluated.
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Affiliation(s)
- Olivia Policianova
- Institute of Macromolecular Chemistry , Academy of Sciences of the Czech Republic, Heyrovského nám. 2, 162 06 Praha 6, Czech Republic
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Yu S, Yang W, Chen S, Chen M, Liu Y, Shao Z, Chen X. Floxuridine-loaded silk fibroin nanospheres. RSC Adv 2014. [DOI: 10.1039/c4ra02113d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A clinical used anti-cancer drug floxuridine was successfully encapsulated in silk fibroin nanospheres. Such drug-loaded nanospheres have controllable size, fair drug-loading capacity and controlled release property, which maybe a good candidate for lymphatic chemotherapy.
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Affiliation(s)
- Shuying Yu
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Laboratory of Advanced Materials
- Fudan University
- Shanghai, China
| | - Wenhua Yang
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Laboratory of Advanced Materials
- Fudan University
- Shanghai, China
| | - Sheng Chen
- Department of General Surgery
- Ruijin Hospital
- Shanghai Jiaotong University School of Medicine
- Shanghai, China
| | - Mengjie Chen
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Laboratory of Advanced Materials
- Fudan University
- Shanghai, China
| | - Yezhuo Liu
- Booocle Pharmaceutical Technology Co., Ltd
- Shanghai, China
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Laboratory of Advanced Materials
- Fudan University
- Shanghai, China
| | - Xin Chen
- State Key Laboratory of Molecular Engineering of Polymers
- Department of Macromolecular Science
- Laboratory of Advanced Materials
- Fudan University
- Shanghai, China
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Vashist A, Vashist A, Gupta YK, Ahmad S. Recent advances in hydrogel based drug delivery systems for the human body. J Mater Chem B 2014; 2:147-166. [DOI: 10.1039/c3tb21016b] [Citation(s) in RCA: 320] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Wilson AN, Guiseppi-Elie A. Targeting homeostasis in drug delivery using bioresponsive hydrogel microforms. Int J Pharm 2014; 461:214-22. [DOI: 10.1016/j.ijpharm.2013.11.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/08/2013] [Accepted: 11/30/2013] [Indexed: 01/29/2023]
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Abstract
Bioresponsive hydrogels are emerging with technological significance in targeted drug delivery, biosensors, and regenerative medicine. Their ability to respond to specific biologically derived stimuli creates a design challenge in effectively linking the conferred biospecificity with an engineered response tailored to the needs of a particular application. Moreover, the fundamental phenomena governing the response must support an appropriate dynamic range, limit of detection, and the potential for feedback control. The design of these systems is inherently complicated due to the high interdependency of the governing phenomena that guide sensing, transduction, and actuation of the hydrogel. Future advancements in bioresponsive hydrogels will out of necessity contain control loops similar to synthetic metabolic pathways. The use of these materials will continue to expand as they become coupled and integrated with new technologies.
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Goszczyński T, Nevozhay D, Wietrzyk J, Omar MS, Boratyński J. The antileukemic activity of modified fibrinogen–methotrexate conjugate. Biochim Biophys Acta Gen Subj 2013; 1830:2526-30. [DOI: 10.1016/j.bbagen.2012.11.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 11/07/2012] [Accepted: 11/10/2012] [Indexed: 01/29/2023]
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Pan H, Sima M, Yang J, Kopeček J. Synthesis of long-circulating, backbone degradable HPMA copolymer-doxorubicin conjugates and evaluation of molecular-weight-dependent antitumor efficacy. Macromol Biosci 2013; 13:155-60. [PMID: 23339052 PMCID: PMC4595041 DOI: 10.1002/mabi.201200353] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/09/2012] [Indexed: 11/09/2022]
Abstract
Backbone degradable, linear, multiblock N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer-doxorubicin (DOX) conjugates are synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization followed by chain extension via thiol-ene click reaction. The examination of molecular-weight-dependent antitumor activity toward human ovarian A2780/AD carcinoma in nude mice reveals enhanced activity of multiblock, second-generation, higher molecular weight conjugates when compared with traditional HPMA copolymer-DOX conjugates. The examination of body weight changes during treatment indicates the absence of non-specific adverse effects.
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Affiliation(s)
- Huaizhong Pan
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Monika Sima
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Jiyuan Yang
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Jindřich Kopeček
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
- Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112, USA
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She W, Luo K, Zhang C, Wang G, Geng Y, Li L, He B, Gu Z. The potential of self-assembled, pH-responsive nanoparticles of mPEGylated peptide dendron–doxorubicin conjugates for cancer therapy. Biomaterials 2013. [DOI: 10.1016/j.biomaterials.2012.11.007] [Citation(s) in RCA: 206] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kopeček J. Polymer-drug conjugates: origins, progress to date and future directions. Adv Drug Deliv Rev 2013; 65:49-59. [PMID: 23123294 DOI: 10.1016/j.addr.2012.10.014] [Citation(s) in RCA: 259] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 09/28/2012] [Accepted: 10/01/2012] [Indexed: 01/01/2023]
Abstract
This overview focuses on bioconjugates of water-soluble polymers with low molecular weight drugs and proteins. After a short discussion of the origins of the field, the state-of-the-art is reviewed. Then research directions needed for the acceleration of the translation of nanomedicines into the clinic are outlined. Two most important directions, synthesis of backbone degradable polymer carriers and drug-free macromolecular therapeutics, a new paradigm in drug delivery, are discussed in detail. Finally, the future perspectives of the field are briefly discussed.
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Etrych T, Šubr V, Strohalm J, Šírová M, Říhová B, Ulbrich K. HPMA copolymer-doxorubicin conjugates: The effects of molecular weight and architecture on biodistribution and in vivo activity. J Control Release 2012; 164:346-54. [DOI: 10.1016/j.jconrel.2012.06.029] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 06/08/2012] [Accepted: 06/21/2012] [Indexed: 10/28/2022]
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26
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Shukla RK, Tiwari A. Carbohydrate polymers: Applications and recent advances in delivering drugs to the colon. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.12.021] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kotanen CN, Wilson AN, Wilson AM, Ishihara K, Guiseppi-Elie A. Biomimetic hydrogels gate transport of calcium ions across cell culture inserts. Biomed Microdevices 2012; 14:549-58. [DOI: 10.1007/s10544-012-9632-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Wilson AN, Salas R, Guiseppi-Elie A. Bioactive hydrogels demonstrate mediated release of a chromophore by chymotrypsin. J Control Release 2012; 160:41-7. [PMID: 22410116 DOI: 10.1016/j.jconrel.2012.02.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 02/14/2012] [Accepted: 02/25/2012] [Indexed: 11/30/2022]
Abstract
A model system, α-chymotrypsin (Cht) (a protease) and a cleavable peptide-chromogen (pro-drug) covalently incorporated into a hydrogel, was investigated to understand the mechanisms of covalent loading and release by enzymatic cleavage in bio-responsive delivery systems. Using EDC and Sulfo-NHS, terminal carboxyl groups of N-succinyl-Ala-Ala-Pro-Phe p-nitroanilide, a cleavable chromogen, were conjugated to primary amines of a hydrated poly(HEMA)-based hydrogel. Hydrogel disks were incubated in buffered Cht causing enzyme-mediated cleavage of the peptide and concomitant release of the chromophore for monitoring. To investigate substrate loading and the effects of hydrogel morphology on the system, the concentration of the amino groups (5, 10, 20, and 30 mol%) and the cross-linked density (1, 5, 7, 9 and 12 mol%) were independently varied. Loading-Release Efficiency of the chromogen was shown to exhibit a positive relation to increasing amino groups (AEMA). The release rates demonstrated a negative relation to increasing cross-linked density attributed to decreasing void fractions and increasing tortuosities. The diffusion coefficient of Cht, D(0,Cht), was determined to be 6.9±0.5×10(-7)cm(2)s(-1), and the range of D(eff) of Cht for 1 to 12 mol% TEGDA was determined to be 6.9×10(-8) to 0.1×10(-8)cm(2)s(-1). We show how these parameters may be optimized and used to achieve programmed release rates in engineered bio-responsive systems.
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Affiliation(s)
- A Nolan Wilson
- Center for Bioelectronics, Biosensors and Biochips (C3B), Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, SC 29625, USA
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English A, Azeem A, Gaspar DA, Keane K, Kumar P, Keeney M, Rooney N, Pandit A, Zeugolis DI. Preferential cell response to anisotropic electro-spun fibrous scaffolds under tension-free conditions. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:137-148. [PMID: 22105221 DOI: 10.1007/s10856-011-4471-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Accepted: 10/24/2011] [Indexed: 05/31/2023]
Abstract
Anisotropic alignment of collagen fibres in musculoskeletal tissues is responsible for the resistance to mechanical loading, whilst in cornea is responsible for transparency. Herein, we evaluated the response of tenocytes, osteoblasts and corneal fibroblasts to the topographies created through electro-spinning and solvent casting. We also evaluated the influence of topography on mechanical properties. At day 14, human osteoblasts seeded on aligned orientated electro-spun mats exhibited the lowest metabolic activity (P < 0.001). At day 5 and at day 7, no significant difference was observed in metabolic activity of human corneal fibroblasts and bovine tenocytes respectively seeded on different scaffold conformations (P > 0.05). Osteoblasts and corneal fibroblasts aligned parallel to the direction of the aligned orientated electro-spun mats, whilst tenocytes aligned perpendicular to the aligned orientated electro-spun mats. Mechanical evaluation demonstrated that aligned orientated electro-spun fibres exhibited significant higher stress at break values than their random aligned counterparts (P < 0.006) and random orientated electro-spun fibres exhibited significant higher strain at break values than the aligned orientated scaffolds (P < 0.006). While maintaining fibre structure, we also developed a co-deposition method of spraying and electro-spinning, which enables the incorporation of microspheres within the three-dimensional structure of the scaffold.
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Affiliation(s)
- A English
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland Galway (NUI Galway), Galway, Ireland
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Xu Z, Li B, Tang W, Chen T, Zhang H, Wang Q. Glycopolypeptide-encapsulated Mn-doped ZnS quantum dots for drug delivery: Fabrication, characterization, and in vitro assessment. Colloids Surf B Biointerfaces 2011; 88:51-7. [DOI: 10.1016/j.colsurfb.2011.05.055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Revised: 05/27/2011] [Accepted: 05/30/2011] [Indexed: 10/18/2022]
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Říhová B, Etrych T, Šírová M, Tomala J, Ulbrich K, Kovář M. Synergistic effect of EMF–BEMER-type pulsed weak electromagnetic field and HPMA-bound doxorubicin on mouse EL4 T-cell lymphoma. J Drug Target 2011; 19:890-9. [DOI: 10.3109/1061186x.2011.622403] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Luo K, Yang J, Kopečková P, Kopeček J. Biodegradable Multiblock Poly[N-(2-hydroxypropyl)methacrylamide] via Reversible Addition-Fragmentation Chain Transfer Polymerization and Click Chemistry. Macromolecules 2011; 44:2481-2488. [PMID: 21552355 DOI: 10.1021/ma102574e] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new bifunctional chain transfer agent (CTA) containing alkyne end groups was designed, synthesized and used for direct synthesis of clickable telechelic polymers. Good control of reversible addition-fragmentation chain transfer (RAFT) polymerization of N-(2-hydroxypropyl)methacrylamide (HPMA) was achieved by using the new CTA, as indicated by a linear increase of number average molecular weight (Mn) with conversion and low polydispersity (PDI) (<1.1). In particular, enzymatically degradable multiblock HPMA polymers were readily prepared by subsequent reaction with αω, -diazido oligopeptide (GFLG) sequence via Cu(I) catalyzed alkyne-azide cycloaddition. Upon exposure of high molecular weight fractions of multiblock polyHPMA to papain or cathepsin B, the polymer was degraded into segments of molecular weight and narrow polydispersity similar to those of the initial telechelic polyHPMA.
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Affiliation(s)
- Kui Luo
- Department of Pharmaceutics and Pharmaceutical Chemistry/CCCD, University of Utah, Salt Lake City, Utah 84112-9452, USA
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