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Tavakoli M, Salehi H, Emadi R, Varshosaz J, Labbaf S, Seifalian AM, Sharifianjazi F, Mirhaj M. 3D printed polylactic acid-based nanocomposite scaffold stuffed with microporous simvastatin-loaded polyelectrolyte for craniofacial reconstruction. Int J Biol Macromol 2024; 258:128917. [PMID: 38134992 DOI: 10.1016/j.ijbiomac.2023.128917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/22/2023] [Accepted: 12/18/2023] [Indexed: 12/24/2023]
Abstract
Critical sized craniofacial defects are among the most challenging bone defects to repair, due to the anatomical complexity and aesthetic importance. In this study, a polylactic acid/hardystonite-graphene oxide (PLA/HTGO) scaffold was fabricated through 3D printing. In order to upgrade the 3D printed scaffold to a highly porous scaffold, its channels were filled with pectin-quaternized chitosan (Pec-QCs) polyelectrolyte solution containing 0 or 20 mg/mL of simvastatin (Sim) and then freeze-dried. These scaffolds were named FD and FD-Sim, respectively. Also, similar PLA/HTGO scaffolds were prepared and dip coated with Pec-QCs solution containing 0 or 20 mg/mL of Sim and were named DC and DC-Sim, respectively. The formation of macro/microporous structure was confirmed by morphological investigations. The release of Sim from DC-Sim and FD-Sim scaffolds after 28 days was measured as 77.40 ± 5.25 and 86.02 ± 3.63 %, respectively. Cytocompatibility assessments showed that MG-63 cells had the highest proliferation, attachment and spread on the Sim containing scaffolds, especially FD-Sim. In vivo studies on a rat calvarial defect model revealed that an almost complete recovery occurred in the group treated with FD-Sim scaffold after 8 weeks and the defect was filled with newly formed bone. The results of this study acknowledge that the FD-Sim scaffold can be a perfect candidate for calvarial defect repair.
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Affiliation(s)
- Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hossein Salehi
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Rahmatollah Emadi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Jaleh Varshosaz
- Department of Pharmaceutics, Novel Drug Delivery Systems Research Centre, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Alexander Marcus Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd, Nanoloom Ltd, Liberum Health Ltd), London BioScience Innovation Centre, London, United Kingdom
| | - Fariborz Sharifianjazi
- Department of Natural Sciences, School of Science and Technology, University of Georgia, Tbilisi, Georgia.
| | - Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Kaviani S, Talebi A, Labbaf S, Karimzadeh F. Conductive GelMA/alginate/polypyrrole/graphene hydrogel as a potential scaffold for cardiac tissue engineering; Physiochemical, mechanical, and biological evaluations. Int J Biol Macromol 2024; 259:129276. [PMID: 38211921 DOI: 10.1016/j.ijbiomac.2024.129276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/28/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
Cardiac failure can be a life-threatening condition that, if left untreated, can have significant consequences. Functional hydrogel has emerged as a promising platform for cardiac tissue engineering. In the proposed study, gelatin methacrylate (GelMA) and alginate, as a primary matrix to maintain cell viability and proliferation, and polypyrrole and carboxyl-graphene, to improve mechanical and electrical properties, are thoroughly evaluated. Initially, a polymer blend of GelMA/Alginate (1:1) was prepared, and then the addition of 2-5 wt% of polypyrrole was evaluated. Next, the effect of incorporating graphene-carboxyl nanosheets (1, 2, and 3 wt%) within the optimized scaffold with 2 wt% polypyrrole was thoroughly studied. The electrical conductivity of the hydrogels was significantly enhanced from 0.0615 ± 0.007 S/cm in GelMA/alginate to 0.124 ± 0.04 S/cm with the addition of 5 wt% polypyrrole. Also, 3 wt% carboxyl graphene improved the electrical conductivity to 0.27 ± 0.09 S/cm. The compressive strength of carboxyl-graphene-containing hydrogel was in the range of 175 to 520 kPa, and tensile strength was 61 and 133 kPa. The simplicity and low-cost fabrication, tunable mechanical properties, optimal electrical conductivity, blood compatibility, and non-cytotoxicity of GelMA/alginate/polypyrrole/graphene biocomposite hydrogel is a promising construct for cardiac tissue engineering.
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Affiliation(s)
- Sajedeh Kaviani
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Alireza Talebi
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sheyda Labbaf
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Fathallah Karimzadeh
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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3
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Mirhaj M, Varshosaz J, Nasab PM, Al-Musawi MH, Almajidi YQ, Shahriari-Khalaji M, Tavakoli M, Alizadeh M, Sharifianjazi F, Mehrjoo M, Labbaf S, Sattar M, Esfahani SN. A double-layer cellulose/pectin-soy protein isolate-pomegranate peel extract micro/nanofiber dressing for acceleration of wound healing. Int J Biol Macromol 2024; 255:128198. [PMID: 37992930 DOI: 10.1016/j.ijbiomac.2023.128198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/12/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
Multi-layered wound dressings can closely mimic the hierarchical structure of the skin. Herein, a double-layer dressing material is fabricated through electrospinning, comprised of a nanofibrous structure as a healing-support layer or the bottom layer (BL) containing pectin (Pec), soy protein isolate (SPI), pomegranate peel extract (P), and a cellulose (Cel) microfiber layer as a protective/monitoring layer or top layer (TL). The formation of a fine bilayer structure was confirmed using scanning electron microscopy. Cel/Pec-SPI-P dressing showed a 60.05 % weight loss during 7 days of immersion in phosphate buffered solution. The ultimate tensile strength, elastic modulus, and elongation at break for different dressings were within the range of 3.14-3.57 MPa, 32.26-36.58 MPa, and 59.04-63.19 %, respectively. The release of SPI and phenolic compounds from dressings were measured and their antibacterial activity was evaluated. The fabricated dressing was non-cytotoxic following exposure to human keratinocyte cells. The Cel/Pec-SPI-P dressing exhibited excellent cell adhesion and migration as well as angiogenesis. More importantly, in vivo experiments on Cel/Pec-SPI-P dressings showed faster epidermal layer formation, blood vessel generation, collagen deposition, and a faster wound healing rate. Overall, it is anticipated that the Cel/Pec-SPI-P bilayer dressing facilitates wound treatment and can be a promising approach for clinical use.
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Affiliation(s)
- Marjan Mirhaj
- Pharmacy Student's Research Committee, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Pegah Madani Nasab
- Pharmacy Student's Research Committee, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mastafa H Al-Musawi
- Department of Clinical Laboratory Science, College of Pharmacy, Mustansiriyah University, Baghdad, Iraq.
| | - Yasir Q Almajidi
- Department of Pharmacy, Baghdad College of Medical Sciences, Baghdad, Iraq
| | - Mina Shahriari-Khalaji
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - Mohamadreza Tavakoli
- Pharmacy Student's Research Committee, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mansoor Alizadeh
- Department of Biomedical Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
| | - Fariborz Sharifianjazi
- Department of Natural Sciences, School of Science and Technology, University of Georgia, Tbilisi 0171, Georgia.
| | - Morteza Mehrjoo
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran; Iran National Cell Bank, Pasteur Institute of Iran, Tehran, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Mamoona Sattar
- College of Biological Science and Medical Engineering, Donghua University, No. 2999 North Renmin Road, Shanghai, 201620, China
| | - Salar Nasr Esfahani
- Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Tavakoli M, Emadi R, Salehi H, Labbaf S, Varshosaz J. Incorporation of graphene oxide as a coupling agent in a 3D printed polylactic acid/hardystonite nanocomposite scaffold for bone tissue regeneration applications. Int J Biol Macromol 2023; 253:126510. [PMID: 37625748 DOI: 10.1016/j.ijbiomac.2023.126510] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/10/2023] [Accepted: 08/23/2023] [Indexed: 08/27/2023]
Abstract
3D printing fabrication has become a dominant approach for the creation of tissue engineering constructs as it is accurate, fast, reproducible and can produce patient-specific templates. In this study, 3D printing is applied to create nanocomposite scaffold of polylactic acid (PLA)/hardystonite (HT)-graphene oxide (GO). GO is utilized as a coupling agent of alkaline treated HT nanoparticles within PLA matrix. The addition of HT-GO nanoparticles of up to 30 wt% to PLA matrix was found to increase the degradability from 7.33 ± 0.66 to 16.03 ± 1.47 % during 28 days. Also, the addition of 20 wt% of HT-GO nanoparticles to PLA scaffold (PLA/20HTGO sample) significantly increased the compressive strength (from 7.65 ± 0.86 to 14.66 ± 1.01 MPa) and elastic modulus (from 94.46 ± 18.03 to 189.15 ± 10.87 MPa). The apatite formation on the surface of nanocomposite scaffolds in simulated body fluid within 28 days confirmed the excellent bioactivity of nanocomposite scaffolds. The MG63 cell adhesion and proliferation and, also, the rat bone marrow mesenchymal stem cells osteogenic differentiation were highly stimulated on the PLA/20HTGO scaffold. According to the sum of results obtained in the current study, the optimized PLA/20HTGO nanocomposite scaffold is highly promising for hard tissue engineering applications.
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Affiliation(s)
- Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Rahmatollah Emadi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Hossein Salehi
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Jaleh Varshosaz
- Department of Pharmaceutics, Novel Drug Delivery Systems Research Centre, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
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Mirhaj M, Varshosaz J, Labbaf S, Emadi R, Seifalian AM, Sharifianjazi F, Tavakoli M. Mupirocin loaded core-shell pluronic-pectin-keratin nanofibers improve human keratinocytes behavior, angiogenic activity and wound healing. Int J Biol Macromol 2023; 253:126700. [PMID: 37673152 DOI: 10.1016/j.ijbiomac.2023.126700] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 08/11/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
In the current study, a core-shell nanofibrous wound dressing based on Pluronic-F127 (F127) containing 2 wt% mupirocin (Mup) core and pectin (Pec)-keratin (Kr) shell was fabricated through coaxial electrospinning technique, and the blended nanofibers were also fabricated from the same materials. The fiber diameter and specific surface area of the blended nanofibers were about 101.56 nm and 20.16 m2/g, while for core-shell nanofibers they were about 97.32 nm and 25.26 m2/g, respectively. The resultant blended and core-shell nanofibers experienced a degradation of 27.65 % and 32.28 % during 7 days, respectively. The drug release profile of core-shell nanofibers revealed a sustained release of Mup over 7 days (87.66 %), while the blended F127-Pec-Kr-Mup nanofibers had a burst release within the first few hours (89.38 % up to 48 h) and a cumulative release of 91.36 % after 7 days. Due to the controlled release of Mup, the core-shell structure significantly improved the human keratinocytes behavior, angiogenic potential and wound healing in a rat model compared to the blended structure. In conclusion, the F127-Mup/Pec-Kr core-shell nanofibrous wound dressing appears to be a promising candidate for the prevention of infection, and can potentially accelerate the recovery and healing of chronic and ischemic wounds.
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Affiliation(s)
- Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Rahmatollah Emadi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Alexander Marcus Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd, Nanoloom Ltd, Liberum Health Ltd), London BioScience Innovation Centre, London, United Kingdom
| | - Fariborz Sharifianjazi
- Department of Natural Sciences, School of Science and Technology, University of Georgia, Tbilisi 0171, Georgia.
| | - Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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6
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Tavakoli M, Mirhaj M, Varshosaz J, Al-Musawi MH, Almajidi YQ, Danesh Pajooh AM, Shahriari-Khalaji M, Sharifianjazi F, Alizadeh M, Labbaf S, Shahrebabaki KE, Nasab PM, Firuzeh M, Esfahani SN. Keratin- and VEGF-Incorporated Honey-Based Sponge-Nanofiber Dressing: An Ideal Construct for Wound Healing. ACS Appl Mater Interfaces 2023; 15:55276-55286. [PMID: 37990423 DOI: 10.1021/acsami.3c11093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
To overcome the drawbacks of single-layered wound dressings, bilayer dressings are now introduced as an alternative to achieve effective and long-term treatment. Here, a bilayer dressing composed of electrospun nanofibers in the bottom layer (BL) and a sponge structure as the top layer (TL) is presented. Hydrophilic poly(acrylic acid) (PAAc)-honey (Hny) with interconnected pores of 76.04 μm was prepared as the TL and keratin (Kr), Hny, and vascular endothelial growth factor (VEGF) were prepared as the BL. VEGF indicates a gradual release over 7 days, promoting angiogenesis, as proven by the chick chorioallantoic membrane assay and in vivo tissue histomorphology observation. Additionally, the fabricated dressing material indicated a satisfactory tensile profile, cytocompatibility for human keratinocyte cells, and the ability to promote cell attachment and migration. The in vivo animal model demonstrated that the full-thickness wound healed faster when it was covered with PAAc-Hny/Hny-Kr-VEGF than in other groups. Additionally, faster blood vessel formation, collagen synthetization, and epidermal layer generation were also confirmed, which have proven efficient healing acceleration in wounds treated with synthesized bilayer dressings. Our findings indicated that the fabricated material can be promising as a functional wound dressing.
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Affiliation(s)
- Mohamadreza Tavakoli
- Pharmacy Student's Research Committee, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Marjan Mirhaj
- Pharmacy Student's Research Committee, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
| | - Mastafa H Al-Musawi
- Department of Clinical Laboratory Science, College of Pharmacy, Mustansiriyah University, Baghdad 10052, Iraq
| | - Yasir Q Almajidi
- Department of Pharmacy (Pharmaceutics), Baghdad College of Medical Sciences, Baghdad 10047, Iraq
| | - Amir Mohammad Danesh Pajooh
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439956191, Iran
| | - Mina Shahriari-Khalaji
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Fariborz Sharifianjazi
- Department of Natural Sciences, School of Science and Technology, University of Georgia, Tbilisi 0171, Georgia
| | - Mansoor Alizadeh
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | | | - Pegah Madani Nasab
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mahboubeh Firuzeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Salar Nasr Esfahani
- Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan 8174673461, Iran
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7
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Mirhaj M, Varshosaz J, Labbaf S, Emadi R, Marcus Seifalian A, Sharifianjazi F. An antibacterial Multi-Layered scaffold fabricated by 3D printing and electrospinning methodologies for skin tissue regeneration. Int J Pharm 2023; 645:123357. [PMID: 37647978 DOI: 10.1016/j.ijpharm.2023.123357] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/11/2023] [Accepted: 08/26/2023] [Indexed: 09/01/2023]
Abstract
A multi-layered scaffold can mimic the hierarchical structure of the skin, accelerate the wound healing, and protect the skin against contamination and infection. In this study, a three-layered (3L) scaffold was manufactured through a combination of 3D printing and electrospinning technique. A top layer of polyurethane (PU) nanofibrous coating for the prevention of micro-organism penetration was created through electrospining. The middle layer was prepared through the 3D printing of Pluronic F127-quaternized chitosan-silver nitrate nanoparticles (F127-QCS-AgNO3), as the porous absorbent and antibacterial layer. A bottom layer of core-shell nanofibrous structure of F127-mupirocin/pectin-keratin (F127-Mup/Pec-Kr) for tissue regeneration and enable antibacterial activity was coated onto the middle layer. A range of techniques were applied to fully characterize the resultant structure. The average tensile strength and elastic modulus of the 3L scaffold were measured as 0.65 ± 0.08 MPa and 9.37 ± 2.33 MPa, respectively. The release of Ag ions, mupirocin (Mup), and the antibacterial activity of the dressings was investigated. According to the results, the highest rate of cell adhesion and viability, and angiogenic potential among the studied samples were related to the 3L scaffold, which was also found to significantly accelerate the wound healing.
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Affiliation(s)
- Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.
| | - Rahmatollah Emadi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.
| | - Alexander Marcus Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd, Nanoloom Ltd, Liberum Health Ltd), London BioScience Innovation Centre, London, United Kingdom.
| | - Fariborz Sharifianjazi
- Department of Natural Sciences, School of Science and Technology, University of Georgia, Tbilisi, Georgia.
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Varzandeh M, Varshosaz J, Labbaf S, Esmaeil N. Sodium-borohydride exfoliated bismuthene loaded with Mitomycin C for chemo-photo-radiotherapy of triple negative breast cancer. Int J Pharm 2023; 636:122825. [PMID: 36921740 DOI: 10.1016/j.ijpharm.2023.122825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023]
Abstract
In current study, a new remotely controlled drug delivery, radio-sensitizing, and photothermal therapy agent based on thioglycolic acid modified bismuth nanosheets is thoroughly evaluated. Bismuth nanosheets were synthesized using sodium borohydride (NaBH4) and Tween 20 through low energy (400 W) sonication within 2 h. The resultant nanosheets were 40-60 nm in size and 1-3 atomic layers in thickness. The morphological and structural characteristics of the nanosheets were studied using transmission electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, Raman spectroscopy and ultraviolet spectroscopy. The surface of the nanosheets was modified using thioglycolic acid, which resulted in enhanced Mitomycin C loading capacity to 274.35% and circumvented the burst drug release due to the improved electrostatic interactions. At pH 7.4 and 5.0, the drug release was significantly boosted from 45.1 to 69.8%, respectively. Thioglycolic acid modified bismuth nanosheets under 1064 nm laser irradiation possessed photothermal conversion efficiency of η=51.4% enabling a temperature rise of 24.9 °C at 100 μg/ml in 5 min. The combination of drug delivery, photothermal therapy, and radio-sensitization greatly damaged the MDA-MB-231 cells through apoptosis and diminished their colony forming.
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Affiliation(s)
- Mohammad Varzandeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Nafiseh Esmaeil
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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Salehi S, Tavakoli M, Mirhaj M, Varshosaz J, Labbaf S, Karbasi S, Jafarpour F, Kazemi N, Salehi S, Mehrjoo M, Emami E. A 3D printed polylactic acid-Baghdadite nanocomposite scaffold coated with microporous chitosan-VEGF for bone regeneration applications. Carbohydr Polym 2023; 312:120787. [PMID: 37059527 DOI: 10.1016/j.carbpol.2023.120787] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/11/2023]
Abstract
Three-dimensional (3D) printing technology has become an advanced approach for fabricating patient-specific scaffolds with complex geometric shapes to replace damaged or diseased tissue. Herein, polylactic acid (PLA)-Baghdadite (Bgh) scaffold were made through the fused deposition modeling (FDM) 3D printing method and subjected to alkaline treatment. Following fabrication, the scaffolds were coated with either chitosan (Cs)-vascular endothelial growth factor (VEGF) or lyophilized Cs-VEGF known as PLA-Bgh/Cs-VEGF and PLA-Bgh/L.(Cs-VEGF), respectively. Based on the results, it was found that the coated scaffolds had higher porosity, compressive strength and elastic modulus than PLA and PLA-Bgh samples. Also, the osteogenic differentiation potential of scaffolds following culture with rat bone marrow-derived mesenchymal stem cells (rMSCs) was evaluated through crystal violet and Alizarin-red staining, alkaline phosphatase (ALP) activity and calcium content assays, osteocalcin measurements, and gene expression analysis. The release of VEGF from the coated scaffolds was assessed and also the angiogenic potential of scaffolds was evaluated. The sum of results presented in the current study strongly suggests that the PLA-Bgh/L.(Cs-VEGF) scaffold can be a proper candidate for bone healing applications.
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Affiliation(s)
- Saeideh Salehi
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Centre, Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Saeed Karbasi
- Department of Biomaterials and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Farnoosh Jafarpour
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Nafise Kazemi
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Sepideh Salehi
- Department of Medicine, Ernst Moritz Arndt University of Greifswald, Greifswald, Germany
| | - Morteza Mehrjoo
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran; Iran National Cell Bank, Pasteur Institute of Iran, Tehran, Iran
| | - Eshagh Emami
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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10
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Bakhshi R, Mohammadi-Zerankeshi M, Mehrabi-Dehdezi M, Alizadeh R, Labbaf S, Abachi P. Additive manufacturing of PLA-Mg composite scaffolds for hard tissue engineering applications. J Mech Behav Biomed Mater 2023; 138:105655. [PMID: 36621086 DOI: 10.1016/j.jmbbm.2023.105655] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/27/2022] [Accepted: 01/01/2023] [Indexed: 01/04/2023]
Abstract
Polylactic acid (PLA) is considered as a great option to be employed as 3D porous scaffold in hard tissue engineering applications owing to its excellent biocompatibility and processability. However, relatively weak mechanical properties and inappropriate biodegradability limit its extensive usage. In order to overcome the mentioned challenges, micrometric magnesium particles were incorporated into the PLA matrix by the fused deposition modeling (FDM) technique. The effects of various Mg contents (i.e., 2, 4, 6, 8 and 10 wt%) on the structural, thermal, rheological, mechanical, wettability, degradability characteristics and cellular behavior of the 3D porous PLA-Mg composite scaffolds were examined. The developed PLA-Mg composites exhibit an interconnected porous structure with a mostly uniform distribution of Mg particles in the PLA matrix. It was found that incorporation of Mg particles into the PLA matrix enhances the mechanical, physical, chemical and biological characteristics of PLA. The cell studies demonstrate that the PLA-6Mg composite scaffold provides the best cellular response in terms of cell atachment and viability. The obtained results in this investigation greatly suggest that the 3D-printed PLA-Mg composite scaffold is a promising candidate for hard tissue engineering applications.
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Affiliation(s)
- Rasoul Bakhshi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | | | - Melika Mehrabi-Dehdezi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Reza Alizadeh
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Parvin Abachi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
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11
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Bassam SN, Salimijazi H, Labbaf S, Amya M, Ehsani P, Mehrbod P. Antibacterial and Virucidal Evaluation of Ultrafine Wire Arc Sprayed German Silver Coatings. J Therm Spray Technol 2023; 32:959-969. [PMID: 37521527 PMCID: PMC9810382 DOI: 10.1007/s11666-022-01528-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 12/01/2022] [Accepted: 12/12/2022] [Indexed: 08/01/2023]
Abstract
Copper and its alloys are known as antimicrobial agents that can be used in public places; however, pure copper has a low wear resistance and tends to lose its gloss relatively fast and stainless steel is still more desirable because of its mechanical properties and stable appearance. In this research, German silver coatings, a copper-nickel alloy, are studied as a superior alternative for pure copper coatings. German silver coating on mild steel substrates and stainless steel with two different surface roughnesses was prepared and placed into water bath up to 6 months to investigate the corrosion and exposure effects on the antibacterial behavior. A range of techniques was used to study the microstructure, surface morphology and mechanical properties such as microhardness, coating bonding adhesion, surface roughness and wettability of the coating. Colony count method was used to measure the antibacterial properties, and samples were tested against influenza A virus to evaluate the virucidal activity. The coating thickness was around 130 µm and contained 15% pores and oxides with splats forming inside the coating structure. Inside each splat, columnar grains could be seen with an average of 700 nm width and 4 µm length. The bonding strength of the coating was about 15 MPa, the hardness of coatings was about 180 HV, and the average surface roughness of the as-sprayed samples was about 10 µm. German silver coatings can destroy both Staphylococcus aureus and Escherichia coli by more than 90% after 6 h of exposure time, and it also has a high-level of virucidal activity against influenza A virus after 2 h exposure time. Antibacterial behavior did not show any significant changes after 6 months of immersing samples in water bath. Thus, thermally sprayed German silver coatings exhibited silvery color for a long period of time, while its antimicrobial efficiency was comparable to pure copper coatings. Supplementary Information The online version contains supplementary material available at 10.1007/s11666-022-01528-4.
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Affiliation(s)
- Seyed Navid Bassam
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111 Iran
| | - Hamidreza Salimijazi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111 Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111 Iran
| | - Melika Amya
- Bacteriology Department, Molecular Biology Lab, Pasteur Institute of Iran, Tehran, Iran
| | - Parastoo Ehsani
- Bacteriology Department, Molecular Biology Lab, Pasteur Institute of Iran, Tehran, Iran
| | - Parvaneh Mehrbod
- Influenza and Respiratory Viruses Department, Pasteur Institute of Iran, Tehran, Iran
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12
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Mirhaj M, Labbaf S, Tavakoli M, Seifalian AM. Cover Image. Int Wound J 2022. [DOI: 10.1111/iwj.13994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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13
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Varzandeh M, Labbaf S, Varshosaz J, Laurent S. An overview of the intracellular localization of high-Z nanoradiosensitizers. Prog Biophys Mol Biol 2022; 175:14-30. [PMID: 36029849 DOI: 10.1016/j.pbiomolbio.2022.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 07/17/2022] [Accepted: 08/19/2022] [Indexed: 06/15/2023]
Abstract
Radiation therapy (RT) is a method commonly used for cancer treatment worldwide. Commonly, RT utilizes two routes for combating cancers: 1) high-energy radiation to generate toxic reactive oxygen species (ROS) (through the dissociation of water molecules) for damaging the deoxyribonucleic acid (DNA) inside the nucleus 2) direct degradation of the DNA. However, cancer cells have mechanisms to survive under intense RT, which can considerably decrease its therapeutic efficacy. Excessive radiation energy damages healthy tissues, and hence, low doses are applied for cancer treatment. Additionally, different radiosensitizers were used to sensitize cancer cells towards RT through individual mechanisms. Following this route, nanoparticle-based radiosensitizers (herein called nanoradiosensitizers) have recently gained attention owing to their ability to produce massive electrons which leads to the production of a huge amount of ROS. The success of the nanoradiosensitizer effect is closely correlated to its interaction with cells and its localization within the cells. In other words, tumor treatment is affected from the chain of events which is started from cell-nanoparticle interaction followed by the nanoparticles direction and homing inside the cell. Therefore, passive or active targeting of the nanoradiosensitizers in the subcellular level and the cell-nano interaction would determine the efficacy of the radiation therapy. The importance of the nanoradiosensitizer's targeting is increased while the organelles beyond nucleus are recently recognized as the mediators of the cancer cell death or resistance under RT. In this review, the principals of cell-nanomaterial interactions and which dominate nanoradiosensitizer efficiency in cancer therapy, are thoroughly discussed.
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Affiliation(s)
- Mohammad Varzandeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Jaleh Varshosaz
- Novel Drug Delivery Systems Research Center and Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging, Department of General, Organic Chemistry and Biomedical, University of Mons, Mons, Belgium.
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14
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Talebi A, Labbaf S, Rahmati S. Biofabrication of a flexible and conductive 3D polymeric scaffold for neural tissue engineering applications; physical, chemical, mechanical, and biological evaluations. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alireza Talebi
- Biomaterials Research Group, Department of Materials Engineering Isfahan University of Technology Isfahan Iran
| | - Sheyda Labbaf
- Biomaterials Research Group, Department of Materials Engineering Isfahan University of Technology Isfahan Iran
| | - Saba Rahmati
- Biomaterials Research Group, Department of Materials Engineering Isfahan University of Technology Isfahan Iran
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15
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Mirhaj M, Labbaf S, Tavakoli M, Seifalian A. An Overview on the Recent Advances in the Treatment of Infected Wounds: Antibacterial Wound Dressings. Macromol Biosci 2022; 22:e2200014. [PMID: 35421269 DOI: 10.1002/mabi.202200014] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/20/2022] [Indexed: 11/11/2022]
Abstract
A wound can be surgical, cuts from an operation or due to accident and trauma. The infected wound, as a result of bacteria growth within the damaged skin, interrupts the natural wound healing process and significantly impacts the quality of life. Wound dressing is an important segment of the skincare industry with its economic burden estimated at $ 20.4 billion (in 2021) in the global market. The results of recent clinical trials suggest that the use of modern dressings can be the easiest, most accessible, and most cost-effective way to treat chronic wounds and, hence, holds significant promise. With the sheer number of dressings in the market, the selection of correct dressing is confusing for clinicians and healthcare workers. The aim of this research was to review widely used types of antibacterial wound dressings, as well as emerging products, for their efficiency and mode of action. In this review, we focus on introducing antibiotics and antibacterial nanoparticles as two important and clinically widely used categories of antibacterial agents. The perspectives and challenges for paving the way for future research in this field are also discussed. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Amelia Seifalian
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
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16
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Mirhaj M, Labbaf S, Tavakoli M, Seifalian AM. Emerging treatment strategies in wound care. Int Wound J 2022; 19:1934-1954. [PMID: 35297170 DOI: 10.1111/iwj.13786] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/05/2022] [Accepted: 03/05/2022] [Indexed: 12/20/2022] Open
Abstract
Wound healing is a complex process in tissue regeneration through which the body responds to the dissipated cells as a result of any kind of severe injury. Diabetic and non-healing wounds are considered an unmet clinical need. Currently, different strategic approaches are widely used in the treatment of acute and chronic wounds which include, but are not limited to, tissue transplantation, cell therapy and wound dressings, and the use of an instrument. A large number of literatures have been published on this topic; however, the most effective clinical treatment remains a challenge. The wound dressing involves the use of a scaffold, usually using biomaterials for the delivery of medication, autologous stem cells, or growth factors from the blood. Antibacterial and anti-inflammatory drugs are also used to stop the infection as well as accelerate wound healing. With an increase in the ageing population leading to diabetes and associated cutaneous wounds, there is a great need to improve the current treatment strategies. This research critically reviews the current advancement in the therapeutic and clinical approaches for wound healing and tissue regeneration. The results of recent clinical trials suggest that the use of modern dressings and skin substitutes is the easiest, most accessible, and most cost-effective way to treat chronic wounds with advances in materials science such as graphene as 3D scaffold and biomolecules hold significant promise. The annual market value for successful wound treatment exceeds over $50 billion US dollars, and this will encourage industries as well as academics to investigate the application of emerging smart materials for modern dressings and skin substitutes for wound therapy.
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Affiliation(s)
- Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.,Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, UK
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Alexander Marcus Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, UK
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17
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Tavakoli M, Mirhaj M, Labbaf S, Varshosaz J, Taymori S, Jafarpour F, Salehi S, Abadi SAM, Sepyani A. Fabrication and evaluation of Cs/PVP sponge containing platelet-rich fibrin as a wound healing accelerator: An in vitro and in vivo study. Int J Biol Macromol 2022; 204:245-257. [PMID: 35131230 DOI: 10.1016/j.ijbiomac.2022.02.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/05/2021] [Accepted: 02/01/2022] [Indexed: 12/12/2022]
Abstract
Despite significant advances in surgery and postoperative care, there are still challenges in the treatment of wounds. In the current study, a freeze-dried chitosan (Cs)/polyvinylpyrrolidone (PVP) sponges containing platelet-rich fibrin (PRF at 1, 1.5 and 2% w/v) for wound dressing application is fabricated and fully characterized. Addition of 1% w/v of PRF to Cs/PVP (CS/PVP/1PRF) sample significantly increased the tensile strength (from 0.147 ± 0.005 to 0.242 ± 0.001 MPa), elastic modulus (from 0.414 ± 0.014 to 0.611 ± 0.022 MPa) and strain at break (from 53.4 ± 0.9 to 61.83 ± 1.17%) compared to Cs sample, and was hence selected as the optimal sample. The antibacterial activity of Cs/PVP/1PRF sponge wound dressing against E. coli and S. aureus was confirmed to be effective. Enzyme-linked immunosorbent assays revealed that the release of both VEGF and PDGF-AB from PRF powder, as well as PDGF-AB from Cs/PVP/1PRF sample was time-independent, but the release of VEGF from Cs/PVP/1PRF sample increased significantly with time. According to MTT and CAM assays, the Cs/PVP/1PRF sample significantly increased proliferation and angiogenic potential, respectively. Furthermore, in vivo studies demonstrated a 97.16 ± 1.55% wound closure for Cs/PVP/1PRF group after 14 days.
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Affiliation(s)
- Mohamadreza Tavakoli
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Marjan Mirhaj
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Iran.
| | - Somayeh Taymori
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Iran
| | - Franoosh Jafarpour
- Department of Animal Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Saeedeh Salehi
- Department of Materials Engineering, Islamic Azad University, Najafabad, Iran
| | | | - Azadeh Sepyani
- Department of Tissue Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
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18
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Mirhaj M, Tavakoli M, Varshosaz J, Labbaf S, Jafarpour F, Ahmaditabar P, Salehi S, Kazemi N. Platelet rich fibrin containing nanofibrous dressing for wound healing application: Fabrication, characterization and biological evaluations. Materials Science and Engineering: C 2021; 134:112541. [DOI: 10.1016/j.msec.2021.112541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 10/25/2021] [Accepted: 11/06/2021] [Indexed: 12/27/2022]
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19
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Talebi A, Labbaf S, Atari M, Parhizkar M. Polymeric Nanocomposite Structures Based on Functionalized Graphene with Tunable Properties for Nervous Tissue Replacement. ACS Biomater Sci Eng 2021; 7:4591-4601. [PMID: 34461017 DOI: 10.1021/acsbiomaterials.1c00744] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electroconductive scaffolds can be a promising approach to repair conductive tissues when natural healing fails. Recently, nerve tissue engineering constructs have been widely investigated due to the challenges in creating a structure with optimized physiochemical and mechanical properties close to the native tissue. The goal of the current study was to fabricate graphene-containing polycaprolactone/gelatin/polypyrrole (PCL/gelatin/PPy) and polycaprolactone/polyglycerol-sebacate/polypyrrole (PCL/PGS/PPy) with intrinsic electrical properties through an electrospinning process. The effect of graphene on the properties of PCL/gelatin/PPy and PCL/PGS/PPy were investigated. Results demonstrated that graphene incorporation remarkably modulated the physical and mechanical properties of the scaffolds such that the electrical conductivity increased from 0.1 to 3.9 ± 0.3 S m-1 (from 0 to 3 wt % graphene) and toughness was found to be 76 MPa (PCL/gelatin/PPy 3 wt % graphene) and 143.4 MPa (PCL/PGS/PPy 3 wt % graphene). Also, the elastic moduli of the scaffolds with 0, 1, and 2 wt % graphene were reported as 210, 300, and 340 kPa in the PCL/gelatin/PPy system and 72, 85, and 92 kPa for the PCL/PGS/PPy system. A cell viability study demonstrated the noncytotoxic nature of the resultant scaffolds. The sum of the results presented in this study suggests that both PCL/gelatin/PPy/graphene and PCL/PGS/PPy/graphene compositions could be promising biomaterials for a range of conductive tissue replacement or regeneration applications.
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Affiliation(s)
- Alireza Talebi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mehdi Atari
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Maryam Parhizkar
- School of Pharmacy, University College London, Torrington Place, London WC1E 7JE, U.K
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20
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Kazemian Z, Varzandeh M, Labbaf S. A facile synthesis of mono dispersed spherical silver doped bioactive glass nanoparticle. J Mater Sci Mater Med 2021; 32:29. [PMID: 33709319 PMCID: PMC7952368 DOI: 10.1007/s10856-021-06496-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
Bioactive glasses have attracted enormous attention in the field of biomaterials for dental and medical applications. Incorporation of antibacterial ions within BGs has been proved to be a promising approach to fortify their bactericidal character. In this study, homogenous BGs containing silver (Ag) ions were synthesized by sol-gel method. Subsequently, the presence of the embedded ions were characterized by X-ray fluorescence (XRF) elemental analysis and energy dispersive X-ray (EDX) spectroscopy. Moreover, released ions were measured in simulated body fluid (SBF) and their antibacterial effectiveness was further verified using minimum bactericidal concentration (MBC) and minimum inhibitory concentration (MIC) tests. A crystalline hydroxyapatite layer was formed on the Ag-BG surfaces at day 5 approved by X-ray diffraction indicating the preserved bioactivity. The resultant uniform, mono-dispersed and dense nanoparticles show 19 great potential for a range of orthopedic and dental applications.
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Affiliation(s)
- Zahra Kazemian
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Mohammad Varzandeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
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21
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Sabouri Z, Labbaf S, Karimzadeh F, Baharlou-Houreh A, McFarlane TV, Esfahani MHN. Fe3O4/bioactive glass nanostructure: a promising therapeutic platform for osteosarcoma treatment. Biomed Mater 2021; 16. [DOI: 10.1088/1748-605x/aba7d5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 07/21/2020] [Indexed: 01/28/2023]
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22
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Fanaee S, Labbaf S, Enayati MH, Karamali F, Esfahani MHN. A nano approach towards the creation of a biointerface as stimulator of osteogenic differentiation. Mater Sci Eng C Mater Biol Appl 2021; 120:111746. [PMID: 33545888 DOI: 10.1016/j.msec.2020.111746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 11/17/2020] [Accepted: 11/19/2020] [Indexed: 01/21/2023]
Abstract
There is a great need for tissue engineering constructs with the ability to modulate stem cell behavior. The initial adhesion, growth and differentiation of stem cell are a key strategy in bone tissue engineering and it can be controlled through biomaterial-cell interface. Here we engineered a polycaprolactone/gelatin/bioactive glass (PCL/GT/BG) nanocomposite scaffold coated with Fibronectin (FN) as a potential candidate to aid the bone regeneration process by giving cells a temporary template to grow into. For this purpose, initially BG nanoparticles (nBG) of 70 ± 15 nm were synthesized, characterized and then impregnated into PCL/GT matrix to create a nanocomposite fibrous mesh. An optimized structure was selected based on fiber uniformity, diameter, and the mechanical properties. Cell adhesion, growth, and the expression of osteogenic-related genes as a result of FN tethering, through specific surface interactions, was evaluated. Furthermore, the potential of optimized nanofiberous structure as a drug delivery vehicle for the local release of therapeutic agents was studied by using amoxicillin as a model drug. The release profile revealed that around 70% of drug was released in an hour for non-crosslinked fibers (burst release) followed by a gradual release up to 72 h. The release profile was steadier for crosslinked fibers. The scaffold also showed an antibacterial effect against ubiquitous gram-positive Staphylococcus aureus. The current study provides an insight for future researchers who aim to create nanocomposite materials as multifunctional scaffolds for bone tissue engineering applications.
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Affiliation(s)
- Sajjad Fanaee
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sheyda Labbaf
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Mohammad Hossein Enayati
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Fereshteh Karamali
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad-Hossein Nasr Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
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23
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Talebi A, Labbaf S, Karimzadeh F, Masaeli E, Nasr Esfahani MH. Electroconductive Graphene-Containing Polymeric Patch: A Promising Platform for Future Cardiac Repair. ACS Biomater Sci Eng 2020; 6:4214-4224. [DOI: 10.1021/acsbiomaterials.0c00266] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Alireza Talebi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Fathallah Karimzadeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Elahe Masaeli
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad-Hossein Nasr Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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24
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Ghane N, Beigi MH, Labbaf S, Nasr-Esfahani MH, Kiani A. Design of hydrogel-based scaffolds for the treatment of spinal cord injuries. J Mater Chem B 2020; 8:10712-10738. [DOI: 10.1039/d0tb01842b] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Hydrogel-based scaffold design approaches for the treatment of spinal cord injuries.
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Affiliation(s)
- Nazanin Ghane
- Department of Cellular Biotechnology Cell Science Research Center
- Royan Institute for Biotechnology
- ACECR
- Isfahan
- Iran
| | - Mohammad-Hossein Beigi
- Department of Cellular Biotechnology Cell Science Research Center
- Royan Institute for Biotechnology
- ACECR
- Isfahan
- Iran
| | - Sheyda Labbaf
- Biomaterials Research Group
- Department of Materials Engineering
- Isfahan University of Technology
- Isfahan
- Iran
| | | | - Amirkianoosh Kiani
- Silicon Hall: Micro/Nano Manufacturing Facility
- Faculty of Engineering and Applied Science
- Ontario Tech University
- Ontario
- Canada
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25
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Ahmadi N, Kharaziha M, Labbaf S. Core-shell fibrous membranes of PVDF-Ba 0.9Ca 0.1TiO 3/PVA with osteogenic and piezoelectric properties for bone regeneration. ACTA ACUST UNITED AC 2019; 15:015007. [PMID: 31694002 DOI: 10.1088/1748-605x/ab5509] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The goal of this research was to promote the bioactivity and osteogenic characteristics of polyvinylidene fluoride(PVDF) fibrous membrane, while preserving its piezoelectric property for bone regeneration. In this regard, core-shell fibrous membrane of PVDF-Ba0.9Ca0.1TiO3/polyvinyl alcohol(PVA) was developed via emulsion electrospinning approach. While PVA was in the outer layer of fibers with thickness of 53 ± 18 nm, the Ba0.9Ca0.1TiO3 nanoparticles was uniformly dispersed in the PVDF core. The formation of PVA shell resulted in significant improvement of its hydrophilicity (3 times) and degradation rate, while piezoelectricity did noticeably modulate. In addition, incorporation of Ba0.9Ca0.1TiO3 nanopowder remarkably improved bioactivity, protein adsorption and mechanical properties of PVDF/PVA fibrous membranes. Finally, the osteogenic differentiation of mesenchymal stem cells on the nanocomposite fibrous membranes, in the absence of osteogenic supplements, was also observed. Overall, the results confirmed the promising potential of PVDF-Ba0.9Ca0.1TiO3/PVA fibrous membrane containing 1-2 wt% nanopowder for bone regeneration.
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Affiliation(s)
- Narges Ahmadi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Beigi MH, Atefi A, Ghanaei HR, Labbaf S, Ejeian F, Nasr-Esfahani MH. Activated platelet-rich plasma improves cartilage regeneration using adipose stem cells encapsulated in a 3D alginate scaffold. J Tissue Eng Regen Med 2019. [PMID: 29522657 DOI: 10.1002/term.2663] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In the current study, the effect of superimposing platelet-rich plasma (PRP) on different culture mediums in a three-dimensional alginate scaffold encapsulated with adipose-derived mesenchymal stem cells for cartilage tissue repair is reported. The three-dimensional alginate scaffolds with co-administration of PRP and/or chondrogenic supplements had a significant effect on the differentiation of adipose mesenchymal stem cells into mature cartilage, as assessed by an evaluation of the expression of cartilage-related markers of Sox9, collagen II, aggrecan and collagen, and glycosaminoglycan assays. For in vivo studies, following induction of osteochondral lesion in a rabbit model, a high degree of tissue regeneration in the alginate plus cell group (treated with PRP plus chondrogenic medium) compared with other groups of cell-free alginate and untreated groups (control) were observed. After 8 weeks, in the alginate plus cell group, functional chondrocytes were observed, which produced immature matrix, and by 16 weeks, the matrix and hyaline-like cartilage became completely homogeneous and integrated with the natural surrounding cartilage in the defect site. Similar effect was also observed in the subchondral bone. The cell-free scaffolds formed fibrocartilage tissue, and the untreated group did not form a continuous cartilage over the defect by 16 weeks.
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Affiliation(s)
- Mohammad-Hossein Beigi
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Atefeh Atefi
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Hamid-Reza Ghanaei
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Sheyda Labbaf
- Biomaterials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Fatemeh Ejeian
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Mohammad-Hossein Nasr-Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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Mahlooji E, Atapour M, Labbaf S. Electrophoretic deposition of Bioactive glass - Chitosan nanocomposite coatings on Ti-6Al-4V for orthopedic applications. Carbohydr Polym 2019; 226:115299. [PMID: 31582073 DOI: 10.1016/j.carbpol.2019.115299] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 08/14/2019] [Accepted: 09/05/2019] [Indexed: 12/13/2022]
Abstract
Chitosan-Bioactive glass (CS-BG) nanocomposite coatings were developed on the Ti-6Al-4 V alloy to investigate the effect of the BG content on the adhesion strength, bioactivity, bio-corrosion, wettability and roughness. For this purpose, BG nanoparticles were synthesized using a sol-gel process. Three nanocomposite coatings with different concentrations of BG (0.5, 1 and 1.5 g/L) were fabricated through cathodic electrophoretic deposition (EPD). The surface morphology and composition of the coatings revealed the formation of compact coatings with a uniform distribution of BG nanoparticles. Increasing the BG content enhanced the deposition rate of CS-BG nanocomposite coatings and raised the coating thickness. Moreover, the CS-BG coating containing 1.5 g/L BG showed the best corrosion performance owing to the more uniform distribution of BG nanoparticles and its higher thickness. Also, increasing the BG concentration improved the adhesion strength, raised the roughness, and promoted wettability. Further, in-vitro bioactivity evaluation of the coated and uncoated specimens in SBF revealed that the formation of bone-like apatite was significantly encouraged on the surface of CS-BG coatings, as compared to the Ti-6Al-4 V uncoated sample. So, the apatite-forming ability of the coatings was improved by increasing the BG content. For in vitro investigation, osteoblast-like cell line MG63 were cultured on Ti-6Al-4 V substrate coated with CS-BG and cellular behavior was evaluated. Results demonstrated good cell attachment with no significant levels of cytotoxicity during 5 days of culture. Therefore, the electrophoretic deposition of the CS-1.5 g/L BG coating could successfully enhance the adhesion strength, bioactivity, corrosion and cellular performance of the substrate.
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Affiliation(s)
- Elham Mahlooji
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Masoud Atapour
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Sheyda Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Ravanbakhsh M, Labbaf S, Karimzadeh F, Pinna A, Houreh AB, Nasr-Esfahani MH. Mesoporous bioactive glasses for the combined application of osteosarcoma treatment and bone regeneration. Mater Sci Eng C Mater Biol Appl 2019; 104:109994. [PMID: 31500021 DOI: 10.1016/j.msec.2019.109994] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 06/28/2019] [Accepted: 07/18/2019] [Indexed: 01/07/2023]
Abstract
In this study, mesoporous bioactive glass (MBG) sub-micro particles were prepared through sol-gel synthesis and possessed a uniform and spherical structure with particle size of 302 ± 43 nm, a pore size of 4 nm and a high surface area of 354 m2 g-1. Alendronate (AL) is often used for the treatment of bone associated diseases, in particular osteosarcoma. However, due to the low bioavailability and high toxicity at increased doses, local and sustained release would be an ideal approach to AL delivery. Here, MBGs and aminated MBGs (AMBG) were applied as carriers for AL loading. High encapsulation efficiency of 75% and 85% and loading efficiency of 60% and 63%, for MBG and AMBG, respectively, was achieved. The release profile of AL from AMBG showed a better sustained and controlled release mechanism compared to MBG. In vitro results demonstrated the non-cytotoxic nature of both MBG and AMBG following exposure to MG63 osteoblast like cell line. AL release from MBG and AMBG, even at lower concentration, provoked decreased MG63 proliferation. The osteogenic potential of MBG and AMBG following exposure to dental pulp stem cells was evaluated using alizarin red assay.
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Affiliation(s)
- M Ravanbakhsh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - S Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - F Karimzadeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - A Pinna
- Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
| | - A Baharlou Houreh
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - M H Nasr-Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
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Safi S, Karimzadeh F, Labbaf S. Mesoporous and hollow hydroxyapatite nanostructured particles as a drug delivery vehicle for the local release of ibuprofen. Mater Sci Eng C Mater Biol Appl 2018; 92:712-719. [PMID: 30184799 DOI: 10.1016/j.msec.2018.07.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 06/18/2018] [Accepted: 07/01/2018] [Indexed: 12/14/2022]
Abstract
The high risk of infection caused by implantation of orthopedic bio-metals is still a daunting challenge for surgeons as it can lead to implant failure. One approach to overcome this issue is the local release of antibacterial drug through coating on the surface of a metallic implant. One ideal carrier for this purpose is hydroxyapatite (HA) particles which are bioactive, biodegradable, biocompatible and have the potential to bond to bone. In the current study, highly crystalline mesoporous HA nanostructure particles were successfully synthesized in a low-temperature solvent process with the aid of an inorganic CaCO3 template and then fully characterized. The specific surface area and the average size of the cavities of the nanostructured mesoporous HA particles were 85 m2/g and 20 nm, respectively. The feasibility of the prepared HA mesoporous nanostructures for drug delivery, using ibuprofen as a model drug, was also investigated. The as-prepared HA mesoporous nanostructures showed a high drug-loading capacity, as well as sustained drug release in a phosphate buffered saline (PBS) at a pH of 7.4. Overall, results show that HA mesoporous nanostructures gave great potential in bone regeneration and local delivery of either drugs or biomolecules.
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Affiliation(s)
- S Safi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - F Karimzadeh
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - S Labbaf
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
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Gholami S, Labbaf S, Houreh AB, Ting HK, Jones JR, Esfahani MHN. Long term effects of bioactive glass particulates on dental pulp stem cells in vitro. Biomedical Glasses 2017. [DOI: 10.1515/bglass-2017-0009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractBioactive glasses (BG) are known for their ability to induce bone formation by the action of their dissolution products. Glasses can deliver active ions at a sustained rate, determined by their composition and surface area. Nanoporous sol-gel derived BGs can biodegrade rapidly, which can lead to a detrimental burst release of ions and a pHrise. The addition of phosphate into the glass can buffer the pH during dissolution. Here, dissolution of BG with composition 60 mol% SiO
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Nommeots-Nomm A, Labbaf S, Devlin A, Todd N, Geng H, Solanki AK, Tang HM, Perdika P, Pinna A, Ejeian F, Tsigkou O, Lee PD, Esfahani MHN, Mitchell CA, Jones JR. Highly degradable porous melt-derived bioactive glass foam scaffolds for bone regeneration. Acta Biomater 2017; 57:449-461. [PMID: 28457960 DOI: 10.1016/j.actbio.2017.04.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/21/2017] [Accepted: 04/25/2017] [Indexed: 10/19/2022]
Abstract
A challenge in using bioactive melt-derived glass in bone regeneration is to produce scaffolds with interconnected pores while maintaining the amorphous nature of the glass and its associated bioactivity. Here we introduce a method for creating porous melt-derived bioactive glass foam scaffolds with low silica content and report in vitro and preliminary in vivo data. The gel-cast foaming process was adapted, employing temperature controlled gelation of gelatin, rather than the in situ acrylic polymerisation used previously. To form a 3D construct from melt derived glasses, particles must be fused via thermal processing, termed sintering. The original Bioglass® 45S5 composition crystallises upon sintering, altering its bioactivity, due to the temperature difference between the glass transition temperature and the crystallisation onset being small. Here, we optimised and compared scaffolds from three glass compositions, ICIE16, PSrBG and 13-93, which were selected due to their widened sintering windows. Amorphous scaffolds with modal pore interconnect diameters between 100-150µm and porosities of 75% had compressive strengths of 3.4±0.3MPa, 8.4±0.8MPa and 15.3±1.8MPa, for ICIE16, PSrBG and 13-93 respectively. These porosities and compressive strength values are within the range of cancellous bone, and greater than previously reported foamed scaffolds. Dental pulp stem cells attached to the scaffold surfaces during in vitro culture and were viable. In vivo, the scaffolds were found to regenerate bone in a rabbit model according to X-ray micro tomography imaging. STATEMENT OF SIGNIFICANCE This manuscript describes a new method for making scaffolds from bioactive glasses using highly bioactive glass compositions. The glass compositions have lower silica content that those that have been previously made into amorphous scaffolds and they have been designed to have similar network connectivity to that of the original (and commercially used) 45S5 Bioglass. The aim was to match Bioglass' bioactivity. The scaffolds retain the amorphous nature of bioactive glass while having an open pore structure and compressive strength similar to porous bone (the original 45S5 Bioglass crystallises during sintering, which can cause reduced bioactivity or instability). The new scaffolds showed unexpectedly rapid bone regeneration in a rabbit model.
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Affiliation(s)
- Sheyda Labbaf
- Department of Mechanical Engineering; Biomaterials Research Lab, University College London; Torrington Place London WC1 7JE UK
| | - Hanif Ghanbar
- Department of Mechanical Engineering; Biomaterials Research Lab, University College London; Torrington Place London WC1 7JE UK
| | - Eleanor Stride
- Department of Mechanical Engineering; University College London; Torrington Place London WC1E 7JE UK
- Institute of Biomedical Engineering; Oxford University; Oxford OX3 7DQ UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering; Biomaterials Research Lab, University College London; Torrington Place London WC1 7JE UK
- Department of Mechanical Engineering; University College London; Torrington Place London WC1E 7JE UK
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Labbaf S, Ghanbar H, Stride E, Edirisinghe M. Preparation of multilayered polymeric structures using a novel four-needle coaxial electrohydrodynamic device. Macromol Rapid Commun 2014; 35:618-23. [PMID: 24510905 PMCID: PMC4237175 DOI: 10.1002/marc.201300777] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 01/05/2013] [Indexed: 01/12/2023]
Abstract
Coaxial four-needle electrohydrodynamic forming is applied for the first time to prepare layered structures in both particle and fiber form. Four different biocompatible polymers, polyethylene glycol, poly (lactic-co-glycolic acid), polycaprolactone, and polymethylsilsesquioxane, are used to generate four distinct layers confirmed using transmission and scanning electron microscopy combined with focused ion beam milling. The incorporation and release of different dyes within the polymeric system of four layers are demonstrated, something that is much desired in modern applications such as the polypill where multiple active pharmaceutical ingredients can be combined to treat numerous diseases.
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Affiliation(s)
- Sheyda Labbaf
- Department of Mechanical Engineering, Biomaterials Research Lab, University College London, Torrington Place, London, WC1 7JE, UK
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Tsigkou O, Labbaf S, Stevens MM, Porter AE, Jones JR. Monodispersed bioactive glass submicron particles and their effect on bone marrow and adipose tissue-derived stem cells. Adv Healthc Mater 2014; 3:115-25. [PMID: 23832877 DOI: 10.1002/adhm.201300126] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Indexed: 02/06/2023]
Abstract
Spherical monodispersed bioactive particles are potential candidates for nanocomposite synthesis or as injectable particles that could be internalized by cells for the local sustained delivery of inorganic therapeutic ions (e.g., calcium or strontium). Particles are also likely to be released from porous bioactive glass and sol-gel hybrid scaffolds as they degrade; thus, it is vital to investigate their interaction with cells. Spherical monodispersed bioactive glass particles (mono-SMBG), with diameters of 215 ± 20 nm are synthesized using a modified Stöber process. Confocal and transmission electron microscopy demonstrate that mono-SMBGs are internalized by human bone marrow (MSCs) and adipose-derived stem cells (ADSCs) and located within cell vesicles and in the cytoplasm. Particle dissolution inside the cells is observed. Alamar Blue, MTT and Cyquant assays demonstrate that 50 μg mL(-1) of mono-SMBGs did not inhibit significantly MSC or ADSC metabolic activity. However, at higher concentrations (100 and 200 μg mL(-1)) small decrease in metabolic activity and total DNA is observed. Mono-SMBG did not induce ALPase activity, an early marker of osteogenic differentiation, without osteogenic supplements; however, in their presence osteogenic differentiation is achieved. Additionally, large numbers of particles are internalized by the cells but have little effect on cell behavior.
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Affiliation(s)
- Olga Tsigkou
- Department of Materials, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK.
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Labbaf S, Deb S, Cama G, Stride E, Edirisinghe M. Preparation of multicompartment sub-micron particles using a triple-needle electrohydrodynamic device. J Colloid Interface Sci 2013; 409:245-54. [DOI: 10.1016/j.jcis.2013.07.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 07/12/2013] [Indexed: 10/26/2022]
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Labbaf S, Horsley H, Chang MW, Stride E, Malone-Lee J, Edirisinghe M, Rohn JL. An encapsulated drug delivery system for recalcitrant urinary tract infection. J R Soc Interface 2013; 10:20130747. [PMID: 24068180 DOI: 10.1098/rsif.2013.0747] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
One of the hallmarks of urinary tract infection, a serious global disease, is its tendency to recur. Uropathogenic bacteria can invade cells lining the bladder, where they form longer-term intracellular reservoirs shielded from antibiotics, re-emerging at a later date to initiate flare-ups. In these cases, only lengthy systemic antibiotic treatment can eradicate all the reservoirs. Yet, long courses of antibiotics are not ideal, as they can lead to side effects and an increase in antibiotic resistance. Moreover, most antibiotics lose some potency by the time they reach the bladder, and many cannot permeate cells, so they cannot access intracellular reservoirs. Here, using coaxial electrohydrodynamic forming, we developed novel core-shell capsules containing antibiotics as a prototype for a future product that could be infused directly into the bladder. Gentamicin was encapsulated in a polymeric carrier (polymethylsilsesquioxane) and these capsules killed Enterococcus faecalis, a common chronic uropathogen, in vitro in a dose-responsive, slow-release manner. Capsules containing a fluorescent tracer dye in place of gentamicin penetrated human bladder cells and released their dye cargo with no apparent toxicity, confirming their ability to successfully permeate cells. These results suggest that such antibiotic capsules could prove useful in the treatment of recalcitrant UTI.
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Affiliation(s)
- Sheyda Labbaf
- Department of Mechanical Engineering, University College London, , London, UK
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Labbaf S, Tsigkou O, Müller KH, Stevens MM, Porter AE, Jones JR. Spherical bioactive glass particles and their interaction with human mesenchymal stem cells in vitro. Biomaterials 2010; 32:1010-8. [PMID: 21071080 DOI: 10.1016/j.biomaterials.2010.08.082] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Accepted: 08/27/2010] [Indexed: 02/06/2023]
Abstract
Sub-micron particles of bioactive glass (SMBGs) with composition 85 mol% SiO(2) and 15 mol% CaO were synthesised and characterised. Bioactivity was demonstrated by the formation of calcium apatite following 5 days immersion in simulated body fluid (SBF). The effect of a 24 h exposure of SMBGs (100 μg/ml, 150 μg/ml, 200 μg/ml) to human mesenchymal stem cells (hMSCs) on cell viability, metabolic activity and proliferation were determined using the LIVE/DEAD, MTT, total DNA and LDH assays after 1, 4 and 7 days of culture. None of the SMBG concentrations caused significant cytotoxicity at 1 and 4 days, but the doses of 150 and 200 μg/ml significantly decreased hMSC metabolic activity after 7 days of culture. Cell proliferation decreased as SMBG concentration increased; however none of the SMBGs tested had a significant effect on DNA quantity compared to the control. Confocal microscopy confirmed cellular uptake and localisation of the SMBGs in the hMSC cytoskeleton. Transmission electron microscopy revealed that the SMBGs localised inside the cell cytoplasm and cell endosomes. These findings are important for assessing the toxicity of sub-micron particles that may either be used as injectables for bone regeneration or generated by wear or degradation of bioactive glass scaffolds.
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Affiliation(s)
- Sheyda Labbaf
- Department of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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