201
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Kumar N, Joisher H, Ganguly A. Polymeric Scaffolds for Pancreatic Tissue Engineering: A Review. Rev Diabet Stud 2018; 14:334-353. [PMID: 29590227 PMCID: PMC6230446 DOI: 10.1900/rds.2017.14.334] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/24/2018] [Accepted: 02/05/2018] [Indexed: 12/17/2022] Open
Abstract
In recent years, there has been an alarming increase in the incidence of diabetes, with one in every eleven individuals worldwide suffering from this debilitating disease. As the available treatment options fail to reduce disease progression, novel avenues such as the bioartificial pancreas are being given serious consideration. In the past decade, the research focus has shifted towards the field of tissue engineering, which helps to design biological substitutes for repair and replacement of non-functional or damaged organs. Scaffolds constitute an integral part of tissue engineering; they have been shown to mimic the native extracellular matrix, thereby supporting cell viability and proliferation. This review offers a novel compilation of the recent advances in polymeric scaffolds, which are used for pancreatic tissue engineering. Furthermore, in this article, the design strategies for bioartificial pancreatic constructs and their future applications in cell-based therapy are discussed.
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Affiliation(s)
| | | | - Anasuya Ganguly
- Department of Biological Sciences, BITS-Pilani, K.K Birla Goa Campus, Goa, India 403726
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202
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Lima DB, Almeida RD, Pasquali M, Borges SP, Fook ML, Lisboa HM. Physical characterization and modeling of chitosan/peg blends for injectable scaffolds. Carbohydr Polym 2018; 189:238-249. [PMID: 29580405 DOI: 10.1016/j.carbpol.2018.02.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 12/22/2017] [Accepted: 02/16/2018] [Indexed: 10/18/2022]
Abstract
Injectable scaffolds find many applications on the biomedical field due to several advantages on preformed scaffolds such as being able to fill any defect can be used in minimal invasion surgeries and are ready to use products. The most critical parameter for an injectable scaffold usage is its injectability, which can be related with rheological properties. Therefore, the objective of the present work was to increase knowledge about the critical parameters influencing injectability of biopolymers used for injectable scaffolds. Rheological and mechanical properties of a biopolymer blend in combination with injectability tests for a given design space controlled by the concentrations of both polymers and temperatures was made. Then those results were modeled to better understand the impact of parameters on injectability. The biopolymer blend chosen was Chitosan physically blended with Poly(ethylene glycol) where variations of both polymer concentrations and molecular weights were tested. Rheological and mechanical properties of all samples were determined, together with the injection force using a compression test at different injection conditions. All solutions were clear and transparent suggesting perfect miscibility. Rheological results were modeled using Ostwald-Waelle law and revealed a shear thinning pseudo-plastic solution at any composition and temperature, being chitosan concentration the most influencing variable. Compression tests results revealed mean injection forces ranging from 9.9 ± 0.06N to 29.9 ± 0.65N and it was possible to accurately estimate those results. Simulations revealed draw speed as the most influencing parameter. Cell viability tests revealed a non-cytotoxic biopolymer blend.
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Affiliation(s)
- Daniel B Lima
- CERTBIO, Unidade Académica de Engenharia dos Materiais, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil
| | - Renata D Almeida
- Unidade Académica de Engenharia de Alimentos, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil
| | - Matheus Pasquali
- Unidade Académica de Engenharia de Alimentos, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil
| | - Sílvia P Borges
- CERTBIO, Unidade Académica de Engenharia dos Materiais, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil
| | - Marcus L Fook
- CERTBIO, Unidade Académica de Engenharia dos Materiais, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil
| | - Hugo M Lisboa
- Unidade Académica de Engenharia de Alimentos, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, 58429-200 Campina Grande, Paraíba, Brazil.
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203
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Wu G, Wang H, Xiao J, Wang L, Ke Y, Fang L, Deng C, Liao H. Blocking of matrix metalloproteinases-13 responsive peptide in poly(urethane urea) for potential cartilage tissue engineering applications. J Biomater Appl 2018; 32:999-1010. [PMID: 29359624 DOI: 10.1177/0885328217753414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The matching of scaffold degradation rate with neotissue growth is required for tissue engineering applications. Timely provision of proper spaces especially for cartilage tissue engineering plays a pivotal role in chondrocyte cluster formation. In this study, poly(urethane urea) was synthesized using conventional two-stage method by extending the isocyanate group terminated prepolymers with different amounts of GPLGLWARK peptide, which responses the degrading induced by matrix metalloproteinase 13, the main proteinase for cartilage matrix degradation. The Fourier transform infrared spectrometer with the attenuated total reflection and 1H nuclear magnetic resonance spectra revealed that the peptides were introduced to poly(urethane urea) according to the characteristic absorption bands of the peptide and the newly formed urea bonds. The ultraviolet-visible spectroscopy spectra showed that the weight percentages of the peptide in the three poly(urethane urea) were 25%, 32%, and 35%. Atomic force microscopy images revealed that phase separation occurred in all poly(urethane urea) samples and became increasingly apparent with increasing amount of peptides introduced. Mechanical tests showed that the poly(urethane urea) strength increased with increasing amount of peptides in poly(urethane urea). Poly(urethane urea) proteolysis in matrix metalloproteinase 13 solution was more rapid than hydrolysis in aqueous buffer, and proteolysis rate was dependent on the amount of peptides in poly(urethane urea). Cell proliferation on the material surface in vitro displayed nontoxicity for all synthesized poly(urethane urea). In vivo subcutaneous implantation evaluation revealed the presence of local foreign body reactions triggered by poly(urethane urea) but was not due to peptide in poly(urethane urea). Moreover, the synthesized poly(urethane urea) with significant phase separation did not degrade under the matrix metalloproteinase 13 free subcutaneous environment, but poly(urethane urea) with minimal phase separation was degraded by attacking of the enzymes adsorbed on the hydrophobic surface through non-specific adsorption.
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Affiliation(s)
- Gang Wu
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,2 Department of Anatomy, Southern Medical University, PR China.,3 Department of Biomedical Engineering, Jinan University, PR China
| | - Huan Wang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China
| | - Jiangwei Xiao
- 4 National Engineering Research Center for Tissue Restoration and Reconstruction, PR China
| | - Lilu Wang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China
| | - Yu Ke
- 5 Guangdong Province Key Laboratory of Biomedical Engineering, PR China
| | - Liming Fang
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,2 Department of Anatomy, Southern Medical University, PR China
| | - Chunlin Deng
- 1 26467 School of Materials Science and Engineering , South China University of Technology, PR China.,3 Department of Biomedical Engineering, Jinan University, PR China
| | - Hua Liao
- 4 National Engineering Research Center for Tissue Restoration and Reconstruction, PR China
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204
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Penta-block copolymer microspheres: Impact of polymer characteristics and process parameters on protein release. Int J Pharm 2018; 535:428-437. [DOI: 10.1016/j.ijpharm.2017.11.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/12/2022]
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205
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The role of titanium dioxide on the morphology, microstructure, and bioactivity of grafted cellulose/hydroxyapatite nanocomposites for a potential application in bone repair. Int J Biol Macromol 2018; 106:481-488. [DOI: 10.1016/j.ijbiomac.2017.08.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 08/01/2017] [Accepted: 08/04/2017] [Indexed: 11/18/2022]
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206
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Liu G, Yuan Q, Hollett G, Zhao W, Kang Y, Wu J. Cyclodextrin-based host–guest supramolecular hydrogel and its application in biomedical fields. Polym Chem 2018. [DOI: 10.1039/c8py00730f] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
CD-based host–guest supramolecular hydrogels and their potential biomedical application.
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Affiliation(s)
- Guiting Liu
- School of Biomedical Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Qijuan Yuan
- School of Biomedical Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
| | - Geoffrey Hollett
- Materials Science and Engineering Program
- University of California San Diego
- La Jolla
- USA
| | - Wei Zhao
- Laboratory for Stem Cells and Tissue Engineering
- Ministry of Education
- Sun Yat-sen University
- Guangzhou 510080
- China
| | - Yang Kang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization
- Chengdu Institute of Biology
- Chinese Academy of Sciences
- Chengdu
- China
| | - Jun Wu
- School of Biomedical Engineering
- Sun Yat-sen University
- Guangzhou
- P. R. China
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207
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Gao C, Peng S, Feng P, Shuai C. Bone biomaterials and interactions with stem cells. Bone Res 2017; 5:17059. [PMID: 29285402 PMCID: PMC5738879 DOI: 10.1038/boneres.2017.59] [Citation(s) in RCA: 334] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/15/2017] [Accepted: 10/23/2017] [Indexed: 12/31/2022] Open
Abstract
Bone biomaterials play a vital role in bone repair by providing the necessary substrate for cell adhesion, proliferation, and differentiation and by modulating cell activity and function. In past decades, extensive efforts have been devoted to developing bone biomaterials with a focus on the following issues: (1) developing ideal biomaterials with a combination of suitable biological and mechanical properties; (2) constructing a cell microenvironment with pores ranging in size from nanoscale to submicro- and microscale; and (3) inducing the oriented differentiation of stem cells for artificial-to-biological transformation. Here we present a comprehensive review of the state of the art of bone biomaterials and their interactions with stem cells. Typical bone biomaterials that have been developed, including bioactive ceramics, biodegradable polymers, and biodegradable metals, are reviewed, with an emphasis on their characteristics and applications. The necessary porous structure of bone biomaterials for the cell microenvironment is discussed, along with the corresponding fabrication methods. Additionally, the promising seed stem cells for bone repair are summarized, and their interaction mechanisms with bone biomaterials are discussed in detail. Special attention has been paid to the signaling pathways involved in the focal adhesion and osteogenic differentiation of stem cells on bone biomaterials. Finally, achievements regarding bone biomaterials are summarized, and future research directions are proposed.
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Affiliation(s)
- Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Shuping Peng
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
- Jiangxi University of Science and Technology, Ganzhou, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China
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208
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Danafar H, Jaberizadeh H, Andalib S. In vitro and in vivo delivery of gliclazide loaded mPEG-PCL micelles and its kinetic release and solubility study. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1625-1636. [DOI: 10.1080/21691401.2017.1386191] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Hossein Danafar
- Zanjan Pharmaceutical Nanotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Hoda Jaberizadeh
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Sina Andalib
- Department of Pharmacology and Toxicology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
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209
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Ahmadi Lakalayeh G, Rahvar M, Haririan E, Karimi R, Ghanbari H. Comparative study of different polymeric coatings for the next-generation magnesium-based biodegradable stents. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1380-1389. [PMID: 28838256 DOI: 10.1080/21691401.2017.1369424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Development of next-generation bioabsorbable stents based on magnesium alloys is gaining lots of attention. However, finding an appropriate coating in order to enhance its corrosion resistance along with preserving other requirements is still a challenge. In this study, three FDA-approved polymers, namely poly(lactic acid), polycaprolactone and poly(lactic-co-glycolic acid), have been investigated as potential coatings for magnesium-based stents to enhance their corrosion resistance, biocompatibility and haemocompatibility. Potentiodynamic and electrochemical impedance spectroscopy results demonstrated that PLA and PLGA coating performed better in improving corrosion resistance in comparison with uncoated and other coated samples. Although all coated and bare samples displayed desirable results of haemocompatibility assays, PLA-coated samples showed better outcome in terms of biocompatibility. The results revealed that PLA can be considered as a potential coating material to enhance the main characteristics of magnesium-based bioabsorbable stents.
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Affiliation(s)
- Gholamreza Ahmadi Lakalayeh
- a Department of Medical Nanotechnology, Regenerative Nanomedicine Research Group, School of Advanced Technologies in Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Mostafa Rahvar
- a Department of Medical Nanotechnology, Regenerative Nanomedicine Research Group, School of Advanced Technologies in Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Esmaeil Haririan
- b Medical Biomaterial Research Center (MBRC) , Tehran University of Medical Sciences , Tehran , Iran
| | - Roya Karimi
- c Tissue Engineering Department, School of Advanced Technologies in Medicine , Tehran University of Medical Sciences , Tehran , Iran
| | - Hossein Ghanbari
- a Department of Medical Nanotechnology, Regenerative Nanomedicine Research Group, School of Advanced Technologies in Medicine , Tehran University of Medical Sciences , Tehran , Iran.,b Medical Biomaterial Research Center (MBRC) , Tehran University of Medical Sciences , Tehran , Iran.,d Research Center for Advanced Technologies in Cardiovascular Medicine , Tehran Heart Center, Tehran University of Medical Sciences , Tehran , Iran
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210
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Ahmaditabar P, Momtazi-Borojeni AA, Rezayan AH, Mahmoodi M, Sahebkar A, Mellat M. Enhanced Entrapment and Improved in Vitro Controlled Release of N-Acetyl Cysteine in Hybrid PLGA/Lecithin Nanoparticles Prepared Using a Nanoprecipitation/Self-Assembly Method. J Cell Biochem 2017; 118:4203-4209. [PMID: 28419535 DOI: 10.1002/jcb.26070] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022]
Abstract
To enhance the in vitro controlled release of N-acetyl cysteine (NAC), hybrid nanoparticles (NPs) consisting of a poly(lactide-co-glycolide) (PLGA) hydrophobic core and a soybean lecithin mono-layer coat were prepared. Hybrid NPs were synthesized using a nanoprecipitation combined with self-assembly method. To characterize prepared NPs, zeta potential, diameter size, surface morphology, disparity, and lipid coating of hybrid NPs were detrmined using dynamic light scattering, scanning electron microscope and Fourier transform infrared spectroscopy techniques. High-performance liquid chromatography was employed to evaluate drug loading yield and encapsulation efficiency and in vitro drug release of prepared NPs. The cytotoxicity of hybrid NPs was assayed on normal L929 alveolar epithelial cells using MTT method. Prepared NPs were found to disperse as individual NPs with a well-defined spherical shape. The hydrodynamic diameter and surface charge of NAC-loaded hybrid NPs were 81.8 ± 1.3 nm and -33.1 ± 2.1 mV, respectively. Drug loading yield and encapsulation efficiency of NAC-loaded hybrid NPs were found to be 38 ± 2.1% and 67 ± 5.7%, respectively. Prepared hybrid NPs showed no significant cytotoxicity against normal alveolar cells. Our data suggest that the hybrid PLGA-lecithin NPs may be An efficient controlled release drug delivery system for NAC. J. Cell. Biochem. 118: 4203-4209, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Parvin Ahmaditabar
- Department of Biomedical Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
| | - Amir A Momtazi-Borojeni
- Nanotechnology Research Center, Student Research Committee, Department of Medical Biotechnology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ali H Rezayan
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Mahboobeh Mahmoodi
- Department of Biomedical Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mostafa Mellat
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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211
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Akhter MH, Rizwanullah M, Ahmad J, Ahsan MJ, Mujtaba MA, Amin S. Nanocarriers in advanced drug targeting: setting novel paradigm in cancer therapeutics. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:873-884. [DOI: 10.1080/21691401.2017.1366333] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Md. Habban Akhter
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Md. Rizwanullah
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard (Hamdard University), New Delhi, India
| | - Javed Ahmad
- Department of Pharmaceutics, Najran University, Najran, Saudi Arabia
| | - Mohamed Jawed Ahsan
- Department of Pharmaceutical Chemistry, Maharishi Arvind College of Pharmacy, Jaipur, Rajasthan, India
| | - Md. Ali Mujtaba
- Department of Pharmaceutics, Faculty of Pharmacy, Northern Border University, Rafha, Saudi Arabia
| | - Saima Amin
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard (Hamdard University), New Delhi, India
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212
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Ahmadkhani L, Akbarzadeh A, Abbasian M. Development and characterization dual responsive magnetic nanocomposites for targeted drug delivery systems. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1052-1063. [PMID: 28754064 DOI: 10.1080/21691401.2017.1360323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A drug delivery system based on dual responsive units was developed. An appealing pH- and thermo-responsive triblock terpolymer as the drug carrier was synthesized by RAFT polymerization of N-isopropyl acrylamide and methacrylic acid monomers using PEG-RAFT agent. The Fe3O4 magnetic nanoparticles were synthesized by co-precipitation of Fe salts. Synthesized samples were characterized by FT-IR, XRD, GPC, SEM and TEM. The dual responsive behaviour and self-assembly of the triblock terpolymers in aqueous solution were investigated using UV-vis transmittance and DLS. Based on the results of DLS and TEM, the average size of micelles was 170, 125 and 30 nm. The triblock terpolymer was used as a chemotherapy drug carrier and doxorubicin as a model drug. The release rate of the drug at two different temperatures (37 °C and 42 °C) and pHs (5.8 and 7.4) was studied. The in vitro cytotoxicity assay of free doxorubicin and drug-loaded magnetic nanoparticles was studied. The MTT assay exhibited that these polymers are biocompatible and no toxicity. As well, IC50 of the DOX-loaded triblock terpolymer in MTT test demonstrated that these systems could be suitable for the treatment of cancer.
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Affiliation(s)
- Lida Ahmadkhani
- a Department of Chemistry , Payame Noor University , Tehran , Iran
| | - Abolfazl Akbarzadeh
- b National Institute For Medical Research Development (Nimad) , Tehran , Iran.,c Universal Scientific Education and Research Network (USERN) , Tabriz , Iran.,d Biotechnology Research Center, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Mojtaba Abbasian
- a Department of Chemistry , Payame Noor University , Tehran , Iran
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213
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Asadi N, Alizadeh E, Salehi R, Khalandi B, Davaran S, Akbarzadeh A. Nanocomposite hydrogels for cartilage tissue engineering: a review. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:465-471. [DOI: 10.1080/21691401.2017.1345924] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Nahideh Asadi
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Effat Alizadeh
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Roya Salehi
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Bahar Khalandi
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Soodabeh Davaran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolfazl Akbarzadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Universal Scientific Education and Research Network (USERN), Tabriz, Iran
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214
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Sanzari I, Callisti M, Grazia AD, Evans DJ, Polcar T, Prodromakis T. Parylene C topographic micropattern as a template for patterning PDMS and Polyacrylamide hydrogel. Sci Rep 2017; 7:5764. [PMID: 28720761 PMCID: PMC5516021 DOI: 10.1038/s41598-017-05434-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/16/2017] [Indexed: 11/09/2022] Open
Abstract
Parylene C is a well-known polymer and it has been mainly employed as a protective layer for implantable electronics. In this paper, we propose a new approach to use Parylene C as a versatile template for patterning soft materials potentially applicable as scaffolds in cardiac tissue engineering (TE). Parylene C substrates were anisotropically patterned through standard lithographic process with hydrophilic channels separating raised hydrophobic strips. Ridges and grooves of the template are 10 µm width and depth ranging from 1 to 17 µm. Polydimethylsiloxane (PDMS) and Polyacrylamide (PAm) hydrogel have been chosen as soft polymers to be moulded. Thanks to their chemical and physical properties PDMS and PAm hydrogel mimic the extracellular matrix (ECM). PDMS was spin coated on micropatterned Parylene C obtaining composite substrates with 460 nm and 1.15 µm high grooves. The Young's modulus of the composite Parylene C/PDMS was evaluated and it was found to be almost half when compared to PDMS. PAm hydrogel was also printed using collagen coated micro-grooved Parylene C. Optical micrographs and fluorescence analysis show the successful topographic and protein pattern transfer on the hydrogel.
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Affiliation(s)
- Ilaria Sanzari
- Nanoelectronics & Nanotechnology Research Group, Department of Electronics and Computer Science, Faculty of Physical Science and Engineering, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom. .,Department of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom.
| | - Mauro Callisti
- Engineering Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
| | - Antonio De Grazia
- Department of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
| | - Daniel J Evans
- Nanoelectronics & Nanotechnology Research Group, Department of Electronics and Computer Science, Faculty of Physical Science and Engineering, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom.,Department of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
| | - Tomas Polcar
- Engineering Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
| | - Themistoklis Prodromakis
- Nanoelectronics & Nanotechnology Research Group, Department of Electronics and Computer Science, Faculty of Physical Science and Engineering, University of Southampton, University Road, Southampton, SO17 1BJ, United Kingdom.,Department of Electronics and Computer Science, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, United Kingdom
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215
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Manjili HK, Malvandi H, Mousavi MS, Attari E, Danafar H. In vitro and in vivo delivery of artemisinin loaded PCL-PEG-PCL micelles and its pharmacokinetic study. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:926-936. [PMID: 28683649 DOI: 10.1080/21691401.2017.1347880] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Artemisinin (ART) is a natural anti-malarial sesquiterpene lactone with anticancer properties, but its application is limited because of its low water solubility. To increase the bioavailability and water solubility of ART, we synthesized three series of poly (ɛ-caprolactone)-poly (ethylene glycol)-poly (ɛ-caprolactone) (PCL-PEG-PCL) tri-block copolymers. The structure of the copolymers was characterized by HNMR, FTIR, DSC and GPC techniques. ART was encapsulated inside micelles by a nanoprecipitation method which leading to the formation of ART/PCL-PEG-PCL micelles. The obtained micelles were characterized by DLS and AFM technique. The results showed that the average size of micelles was about 83.22 nm. ART was encapsulated into PCL-PEG-PCL micelles with encapsulation efficacy of 89.23 ± 1.41%. In vivo results demonstrated that this formulation significantly increased drug accumulation in tumours. Pharmacokinetic study in rats revealed that in vivo drug exposure of ART was significantly increased and prolonged by intravenously administering ART-loaded micelles when compared with the same dose of free ART. The MTT assay showed that bare PCL-PEG-PCL micelles is non-toxic to MCF7 and 4T1 cancer cell lines whereas the ART/PCL-PEG-PCL micelles showed a specific toxicity to both cancer cell lines. Therefore, the polymeric micellar formulation of ART based copolymer could provide a desirable process for ART delivery.
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Affiliation(s)
- Hamidreza Kheiri Manjili
- a Zanjan Pharmaceutical Biotechnology Research Center , Zanjan University of Medical Sciences , Zanjan , Iran.,b Department of Pharmaceutical Nanotechnology, School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Hojjat Malvandi
- c School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Mir Sajjad Mousavi
- c School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Elahe Attari
- c School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
| | - Hossein Danafar
- d Zanjan Pharmaceutical Nanotechnology Research Center , Zanjan University of Medical Sciences , Zanjan , Iran.,e Department of Medicinal Chemistry, School of Pharmacy , Zanjan University of Medical Sciences , Zanjan , Iran
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216
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Faccendini A, Vigani B, Rossi S, Sandri G, Bonferoni MC, Caramella CM, Ferrari F. Nanofiber Scaffolds as Drug Delivery Systems to Bridge Spinal Cord Injury. Pharmaceuticals (Basel) 2017; 10:ph10030063. [PMID: 28678209 PMCID: PMC5620607 DOI: 10.3390/ph10030063] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/13/2017] [Accepted: 07/01/2017] [Indexed: 12/21/2022] Open
Abstract
The complex pathophysiology of spinal cord injury (SCI) may explain the current lack of an effective therapeutic approach for the regeneration of damaged neuronal cells and the recovery of motor functions. A primary mechanical injury in the spinal cord triggers a cascade of secondary events, which are involved in SCI instauration and progression. The aim of the present review is to provide an overview of the therapeutic neuro-protective and neuro-regenerative approaches, which involve the use of nanofibers as local drug delivery systems. Drugs released by nanofibers aim at preventing the cascade of secondary damage (neuro-protection), whereas nanofibrous structures are intended to re-establish neuronal connectivity through axonal sprouting (neuro-regeneration) promotion, in order to achieve a rapid functional recovery of spinal cord.
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Affiliation(s)
- Angela Faccendini
- Department of Drug Sciences, University of Pavia, Viale Taramelli, 12, 27100 Pavia, Italy.
| | - Barbara Vigani
- Department of Drug Sciences, University of Pavia, Viale Taramelli, 12, 27100 Pavia, Italy.
| | - Silvia Rossi
- Department of Drug Sciences, University of Pavia, Viale Taramelli, 12, 27100 Pavia, Italy.
| | - Giuseppina Sandri
- Department of Drug Sciences, University of Pavia, Viale Taramelli, 12, 27100 Pavia, Italy.
| | | | | | - Franca Ferrari
- Department of Drug Sciences, University of Pavia, Viale Taramelli, 12, 27100 Pavia, Italy.
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217
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Kumar N, Desagani D, Chandran G, Ghosh NN, Karthikeyan G, Waigaonkar S, Ganguly A. Biocompatible agarose-chitosan coated silver nanoparticle composite for soft tissue engineering applications. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017. [PMID: 28639839 DOI: 10.1080/21691401.2017.1337021] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
With increasing gap in the demand and supply of vital organs for transplantation there is a pressing need to bridge the gap with substitutes. One way to make substitutes is by tissue engineering which involves combining several types of synthetic or biomaterials, cells and growth factors cross-linked together to synthesize a functional scaffold for repair or replacement of non-functional organs. Nanoparticle based composites are gaining importance in tissue engineering due to their ability to enhance cell attachment and proliferation. The current study focuses on synthesizing agarose composites embedded with chitosan-coated silver nanoparticles using glutaraldehyde as the cross-linker. The synthesis of chitosan coated silver nanoparticles within the scaffold was confirmed with UV-visible spectroscopy. Physical and chemical characterization of the synthesized nanoparticles were done by XRD, FTIR, TGA and SEM. DMA showed higher mechanical strength of the scaffolds. The scaffolds showed degradation of ∼37% within a span of four weeks. The higher physical support provided by the synthesized scaffolds was shown by in-vitro cell viability assay. Broad spectrum anti-bacterial activity and superior hemocompatibility further showed the advantage it offered for growing cells. Thus a biopolymer based nanocomposite was synthesized, with intended widespread use as scaffold for engineering of soft tissues due to its enhanced biocompatibility and greater surface area for cell growth.
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Affiliation(s)
- Nupur Kumar
- a Department of Biological Science , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Dayananda Desagani
- b Department of Chemistry , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Girish Chandran
- c Department of Mechanical Engineering , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Narendra Nath Ghosh
- b Department of Chemistry , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Ganesh Karthikeyan
- c Department of Mechanical Engineering , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Sachin Waigaonkar
- c Department of Mechanical Engineering , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
| | - Anasuya Ganguly
- a Department of Biological Science , BITS-Pilani, K.K Birla Goa Campus , Zuarinagar , India
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218
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Pang C, Ibrahim A, Bulstrode NW, Ferretti P. An overview of the therapeutic potential of regenerative medicine in cutaneous wound healing. Int Wound J 2017; 14:450-459. [PMID: 28261962 DOI: 10.1111/iwj.12735] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/05/2017] [Accepted: 02/10/2017] [Indexed: 12/14/2022] Open
Abstract
The global burden of disease associated with wounds is an increasingly significant public health concern. Current treatments are often expensive, time-consuming and limited in their efficacy in chronic wounds. The challenge of overcoming current barriers associated with wound care requires innovative management techniques. Regenerative medicine is an emerging field of research that focuses on the repair, replacement or regeneration of cells, tissues or organs to restore impaired function. This article provides an overview of the pathophysiology of wound healing and reviews the latest evidence on the application of the principal components of regenerative medicine (growth factors, stem cell transplantation, biomaterials and tissue engineering) as therapeutic targets. Improved knowledge and understanding of the pathophysiology of wound healing has pointed to new therapeutic targets. Regenerative medicine has the potential to underpin the design of specific target therapies in acute and chronic wound healing. This personalised approach could eventually reduce the burden of disease associated with wound healing. Further evidence is required in the form of large animal studies and clinical trials to assess long-term efficacy and safety of these new treatments.
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Affiliation(s)
- Calver Pang
- Department of Surgery Surgical Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Amel Ibrahim
- Stem Cells and Regenerative Medicine Section, UCL GOS Institute of Child Health, University College London, London, UK.,Great Ormond Street Hospital for Children, London, UK
| | - Neil W Bulstrode
- Stem Cells and Regenerative Medicine Section, UCL GOS Institute of Child Health, University College London, London, UK.,Great Ormond Street Hospital for Children, London, UK
| | - Patrizia Ferretti
- Stem Cells and Regenerative Medicine Section, UCL GOS Institute of Child Health, University College London, London, UK.,Great Ormond Street Hospital for Children, London, UK
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