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In vitro evaluation of modified halloysite nanotubes with sodium alginate-reinforced PVA/PVP nanocomposite films for tissue engineering applications. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02684-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Interfacial Surface Properties of Compression Moulded Hydrolysed Polyvinyl Acetate (PVAc) Using Different Release Materials. Symmetry (Basel) 2022. [DOI: 10.3390/sym14102063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Understanding the effect surface production has on polymer properties is important in the design of advanced materials. The aim of this study was to determine how the moulding process affected the rate of hydrolysis and the topography, chemistry and physicochemistry of PVAc moulded, hydrolysed surfaces. Three different mould surface materials were used to produce compression moulded PVAc sheets which were treated with aqueous NaOH at a range of concentrations. The Textile moulded sheet demonstrated the best hydrolysis results. The topography of the moulded sheets was transferred to the surfaces and the Kapton release sheet was visually smooth at lower magnification and demonstrated some pitting at higher magnification. The Teflon surface had features transferred from the coated stainless steel at lower magnifications and linear features at higher magnifications and the textile surface had a wrinkled appearance and irregularly spaced peaks. The release sheet used to mould the PVAc surfaces, affected the physicochemical parameters. The Kapton moulded surface demonstrated the most polar attributes and the Teflon surface the most dispersive. It was clear that the selection of the mould material had an influence on surface properties and hydrolysis of moulded PVAc. Such information is important for engineering design in industrial processes.
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Sikandar M, Shoaib MH, Yousuf RI, Ahmed FR, Ali FR, Saleem MT, Ahmed K, Sarfaraz S, Jabeen S, Siddiqui F, Husain T, Qazi F, Imtiaz MS. Nanoclay-Based Composite Films for Transdermal Drug Delivery: Development, Characterization, and in silico Modeling and Simulation. Int J Nanomedicine 2022; 17:3463-3481. [PMID: 35959283 PMCID: PMC9359522 DOI: 10.2147/ijn.s367540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 07/24/2022] [Indexed: 11/26/2022] Open
Abstract
Purpose Halloysite nanotubes (HNTs) are a versatile and highly investigated clay mineral due to their natural availability, low cost, strong mechanical strength, biocompatibility, and binding properties. The present work explores its role for retarding and controlling the drug release from the composite polymer matrix material. Methods For this purpose, nanocomposite films comprising propranolol HCl and different concentrations of HNTs were formulated using the “solution casting method”. The menthol in a concentration of 1% w/v was used as a permeation enhancer, and its effect on release and permeation was also determined. Quality characteristics of the nanocomposite were determined, and in vitro release and permeation studies were performed using the Franz diffusion system. The data was analyzed using various mathematical models and permeation parameters. Optimized formulation was also subjected to skin irritation test, FTIR, DSC, and SEM study. Systemic absorption and disposition of propranolol HCl from the nanocomposites were predicted using the GastroPlus TCAT® model. Results The control in drug release rate was associated with the higher concentration of HNTs. F8 released 50% of propranolol within 8 hours (drug, HNTs ratio, 1:2). The optimized formulation (F6) with drug: HNTs (2:1), exhibited drug release 80% in 4 hours, with maximum flux of 145.812 µg/cm2hr. The optimized formulation was found to be a non-irritant for skin with a shelf life of 35.46 months (28–30 ℃). The in silico model predicted Cmax, Tmax, AUCt, and AUCinf as 32.113 ng/mL, 16.58 h, 942.34 ng/mL×h, and 1102.9 ng/mL×h, respectively. Conclusion The study demonstrated that HNTs could be effectively used as rate controlling agent in matrix type transdermal formulations.
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Affiliation(s)
- Muhammad Sikandar
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Harris Shoaib
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
- Correspondence: Muhammad Harris Shoaib, Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan, Email ;
| | - Rabia Ismail Yousuf
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Farrukh Rafiq Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Fatima Ramzan Ali
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
- Jinnah College of Pharmacy, Sohail University, Karachi, 74000, Pakistan
| | - Muhammad Talha Saleem
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Kamran Ahmed
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Sana Sarfaraz
- Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Sabahat Jabeen
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Fahad Siddiqui
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Tazeen Husain
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Faaiza Qazi
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Suleman Imtiaz
- Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi, 75270, Pakistan
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Mohammadzadehmoghadam S, LeGrand CF, Wong CW, Kinnear BF, Dong Y, Coombe DR. Fabrication and Evaluation of Electrospun Silk Fibroin/Halloysite Nanotube Biomaterials for Soft Tissue Regeneration. Polymers (Basel) 2022; 14:polym14153004. [PMID: 35893969 PMCID: PMC9332275 DOI: 10.3390/polym14153004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/08/2022] [Accepted: 07/18/2022] [Indexed: 12/21/2022] Open
Abstract
The production of nanofibrous materials for soft tissue repair that resemble extracellular matrices (ECMs) is challenging. Electrospinning uniquely produces scaffolds resembling the ultrastructure of natural ECMs. Herein, electrospinning was used to fabricate Bombyx mori silk fibroin (SF) and SF/halloysite nanotube (HNT) composite scaffolds. Different HNT loadings were examined, but 1 wt% HNTs enhanced scaffold hydrophilicity and water uptake capacity without loss of mechanical strength. The inclusion of 1 wt% HNTs in SF scaffolds also increased the scaffold’s thermal stability without altering the molecular structure of the SF, as revealed by thermogravimetric analyses and Fourier transform infrared spectroscopy (FTIR), respectively. SF/HNT 1 wt% composite scaffolds better supported the viability and spreading of 3T3 fibroblasts and the differentiation of C2C12 myoblasts into aligned myotubes. These scaffolds coated with decellularised ECM from 3T3 cells or primary human dermal fibroblasts (HDFs) supported the growth of primary human keratinocytes. However, SF/HNT 1 wt% composite scaffolds with HDF-derived ECM provided the best microenvironment, as on these, keratinocytes formed intact monolayers with an undifferentiated, basal cell phenotype. Our data indicate the merits of SF/HNT 1 wt% composite scaffolds for applications in soft tissue repair and the expansion of primary human keratinocytes for skin regeneration.
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Affiliation(s)
- Soheila Mohammadzadehmoghadam
- School of Civil and Mechanical Engineering, Curtin University, Bentley, WA 6102, Australia;
- Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia; (C.F.L.); (C.-W.W.); (B.F.K.)
| | - Catherine F. LeGrand
- Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia; (C.F.L.); (C.-W.W.); (B.F.K.)
- Curtin Medical School, Pharmacy and Biomedical Sciences, Curtin University, Bentley, WA 6102, Australia
| | - Chee-Wai Wong
- Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia; (C.F.L.); (C.-W.W.); (B.F.K.)
- Curtin Medical School, Pharmacy and Biomedical Sciences, Curtin University, Bentley, WA 6102, Australia
| | - Beverley F. Kinnear
- Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia; (C.F.L.); (C.-W.W.); (B.F.K.)
- Curtin Medical School, Pharmacy and Biomedical Sciences, Curtin University, Bentley, WA 6102, Australia
| | - Yu Dong
- School of Civil and Mechanical Engineering, Curtin University, Bentley, WA 6102, Australia;
- Correspondence: (Y.D.); (D.R.C.)
| | - Deirdre R. Coombe
- Curtin Health Innovation Research Institute, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia; (C.F.L.); (C.-W.W.); (B.F.K.)
- Curtin Medical School, Pharmacy and Biomedical Sciences, Curtin University, Bentley, WA 6102, Australia
- Correspondence: (Y.D.); (D.R.C.)
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Abu-Thabit N, Hakeem AS, Mezghani K, Ratemi E, Elzagheid M, Umar Y, Primartomo A, Al Batty S, Azad AK, Al Anazi S, Ahmad A. Preparation of pH-Indicative and Flame-Retardant Nanocomposite Films for Smart Packaging Applications. SENSORS 2020; 20:s20195462. [PMID: 32977576 PMCID: PMC7582257 DOI: 10.3390/s20195462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 11/16/2022]
Abstract
There is an increasing demand for sustainable and safe packaging technologies to improve consumer satisfaction, reduce food loss during storage and transportation, and track the quality status of food throughout its distribution. This study reports the fabrication of colorimetric pH-indicative and flame-retardant nanocomposite films (NCFs) based on polyvinyl alcohol (PVA) and nanoclays for smart and safe food packaging applications. Tough, flexible, and transparent NCFs were obtained using 15% nanoclay loading (PVA-15) with superior properties, including low solubility/swelling in water and high thermal stability with flame-retardant behavior. The NCFs showed average mechanical properties that are comparable to commercial films for packaging applications. The color parameters were recorded at different pH values and the prepared NCFs showed distinctive colorimetric pH-responsive behavior during the transition from acidic to alkaline medium with high values for the calculated color difference (∆E ≈ 50). The prepared NCFs provided an effective way to detect the spoilage of the shrimp samples via monitoring the color change of the NCFs during the storage period. The current study proposes the prepared NCFs as renewable candidates for smart food packaging featuring colorimetric pH-sensing for monitoring food freshness as well as a safer alternative choice for applications that demand films with fire-retardant properties.
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Affiliation(s)
- Nedal Abu-Thabit
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
- Correspondence: ; Tel.: +966-13-340-5400
| | - Abbas Saeed Hakeem
- Center of Excellence in Nanotechnology (CENT), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia;
| | - Khaled Mezghani
- Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia;
| | - Elaref Ratemi
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Mohamed Elzagheid
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Yunusa Umar
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Adhi Primartomo
- Department of Mechanical and Manufacturing Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia;
| | - Sirhan Al Batty
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Abdul Kalam Azad
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Sami Al Anazi
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
| | - Ayman Ahmad
- Department of Chemical and Process Engineering Technology, Jubail Industrial College, Jubail Industrial City 31961, Saudi Arabia; (E.R.); (M.E.); (Y.U.); (S.A.B.); (A.K.A.); (S.A.A.); (A.A.)
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Development and Characterization of Polyester and Acrylate-Based Composites with Hydroxyapatite and Halloysite Nanotubes for Medical Applications. Polymers (Basel) 2020; 12:polym12081703. [PMID: 32751376 PMCID: PMC7465803 DOI: 10.3390/polym12081703] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 07/28/2020] [Accepted: 07/28/2020] [Indexed: 11/17/2022] Open
Abstract
We aimed to study the distribution of hydroxyapatite (HA) and halloysite nanotubes (HNTs) as fillers and their influence on the hydrophobic character of conventional polymers used in the biomedical field. The hydrophobic polyester poly (ε-caprolactone) (PCL) was blended with its more hydrophilic counterpart poly (lactic acid) (PLA) and the hydrophilic acrylate poly (2-hydroxyethyl methacrylate) (PHEMA) was analogously compared to poly (ethyl methacrylate) (PEMA) and its copolymer. The addition of HA and HNTs clearly improve surface wettability in neat samples (PCL and PHEMA), but not that of the corresponding binary blends. Energy-dispersive X-ray spectroscopy mapping analyses show a homogenous distribution of HA with appropriate Ca/P ratios between 1.3 and 2, even on samples that were incubated for seven days in simulated body fluid, with the exception of PHEMA, which is excessively hydrophilic to promote the deposition of salts on its surface. HNTs promote large aggregates on more hydrophilic polymers. The degradation process of the biodegradable polyester PCL blended with PLA, and the addition of HA and HNTs, provide hydrophilic units and decrease the overall crystallinity of PCL. Consequently, after 12 weeks of incubation in phosphate buffered saline the mass loss increases up to 48% and mechanical properties decrease above 60% compared with the PCL/PLA blend.
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Huang K, Ou Q, Xie Y, Chen X, Fang Y, Huang C, Wang Y, Gu Z, Wu J. Halloysite Nanotube Based Scaffold for Enhanced Bone Regeneration. ACS Biomater Sci Eng 2019; 5:4037-4047. [DOI: 10.1021/acsbiomaterials.9b00277] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Keqing Huang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong 510006, P. R. China
| | - Qianmin Ou
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Yunyi Xie
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Xuewen Chen
- Agriculture and Forestry Yan Jiaxian Innovative Class, Fujian Agriculture and Forestry University, Fuzhou, 350002, P.R. China
| | - Yifei Fang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong 510006, P. R. China
| | - Chunlin Huang
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong 510006, P. R. China
| | - Yan Wang
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Zhipeng Gu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong 510006, P. R. China
- Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, 518057, P.R. China
| | - Jun Wu
- Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province, School of Biomedical Engineering, Sun Yat-Sen University, 132 East Waihuan Road, Guangzhou Higher Education Mega Center, Guangzhou, Guangdong 510006, P. R. China
- Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, 518057, P.R. China
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Synthesis and Characterization of a Bioartificial Polymeric System with Potential Antibacterial Activity: Chitosan-Polyvinyl Alcohol-Ampicillin. Molecules 2018; 23:molecules23123109. [PMID: 30486491 PMCID: PMC6321558 DOI: 10.3390/molecules23123109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/28/2018] [Accepted: 10/30/2018] [Indexed: 11/21/2022] Open
Abstract
Bio-artificial polymeric systems are a new class of polymeric constituents based on blends of synthetic and natural polymers, designed with the purpose of producing new materials that exhibit enhanced properties with respect to the individual components. In this frame, a combination of polyvinyl alcohol (PVA) and chitosan, blended with a widely used antibiotic, sodium ampicillin, has been developed showing a moderate behavior in terms of antibacterial properties. Thus, aqueous solutions of PVA at 1 wt.% were mixed with acid solutions of chitosan at 1 wt.%, followed by adding ampicillin ranging from 0.3 to 1.0 wt.% related to the total amount of the polymers. The prepared bio-artificial polymeric system was characterized by FTIR, SEM, DSC, contact angle measurements, antibacterial activity against Staphylococcus aureus and Escherichia coli and antibiotic release studies. The statistical significance of the antibacterial activity was determined using a multifactorial analysis of variance with ρ < 0.05 (ANOVA). The characterization techniques did not show alterations in the ampicillin structure and the interactions with polymers were limited to intermolecular forces. Therefore, the antibiotic was efficiently released from the matrix and its antibacterial activity was preserved. The system disclosed moderate antibacterial activity against bacterial strains without adding a high antibiotic concentration. The findings of this study suggest that the system may be effective against healthcare-associated infections, a promising view in the design of novel antimicrobial biomaterials potentially suitable for tissue engineering applications.
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De Giglio E, Bonifacio MA, Ferreira AM, Cometa S, Ti ZY, Stanzione A, Dalgarno K, Gentile P. Multi-compartment scaffold fabricated via 3D-printing as in vitro co-culture osteogenic model. Sci Rep 2018; 8:15130. [PMID: 30310164 PMCID: PMC6181937 DOI: 10.1038/s41598-018-33472-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 09/25/2018] [Indexed: 12/29/2022] Open
Abstract
The development of in vitro 3D models to get insights into the mechanisms of bone regeneration could accelerate the translation of experimental findings to the clinic, reducing costs and duration of experiments. This work explores the design and manufacturing of multi-compartments structures in poly(ε-caprolactone) (PCL) 3D-printed by Fused Filament Fabrication technique. The construct was designed with interconnected stalls to host stem cells and endothelial cells. Cells were encapsulated within an optimised gellan gum (GG)-based hydrogel matrix, crosslinked using strontium (Sr2+) ions to exploit its bioactivity and finally, assembled within compartments with different sizes. Calcium (Ca2+)-crosslinked gels were also used as control for comparison of Sr2+ osteogenic effect. The results obtained demonstrated that Sr2+ ions were successfully diffused within the hydrogel matrix and increased the hydrogel matrix strength properties under compressive load. The in vitro co-culture of human-TERT mesenchymal stem cells (TERT- hMSCs) and human umbilical vein endothelial cells (HUVECs), encapsulated within Sr2+ ions containing GG-hydrogels and inter-connected by compartmentalised scaffolds under osteogenic conditions, enhanced cell viability and supported osteogenesis, with a significant increase of alkaline phosphatase activity, osteopontin and osteocalcin respect with the Ca2+-crosslinked GG-PCL scaffolds. These outcomes demonstrate that the design and manufacturing of compartmentalised co-culture of TERT-hMSCs and HUVEC populations enables an effective system to study and promote osteogenesis.
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Affiliation(s)
- Elvira De Giglio
- Department of Chemistry, University of Bari Aldo Moro, Via E. Orabona 4, Bari, 70126, Italy.
| | - Maria A Bonifacio
- Department of Chemistry, University of Bari Aldo Moro, Via E. Orabona 4, Bari, 70126, Italy
| | - Ana M Ferreira
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Zhi Yuan Ti
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK
| | - Antonella Stanzione
- Department of Chemistry, University of Bari Aldo Moro, Via E. Orabona 4, Bari, 70126, Italy
| | - Kenny Dalgarno
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK
| | - Piergiorgio Gentile
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK.
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Boyer CJ, Ambrose J, Das S, Humayun A, Chappidi D, Giorno R, Mills DK. Antibacterial and antibiofouling clay nanotube-silicone composite. MEDICAL DEVICES-EVIDENCE AND RESEARCH 2018; 11:123-137. [PMID: 29713206 PMCID: PMC5907789 DOI: 10.2147/mder.s146248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction Invasive medical devices are used in treating millions of patients each day. Bacterial adherence to their surface is an early step in biofilm formation that may lead to infection, health complications, longer hospital stays, and death. Prevention of bacterial adherence and biofilm development continues to be a major healthcare challenge. Accordingly, there is a pressing need to improve the anti-microbial properties of medical devices. Materials and Methods Polydimethylsiloxane (PDMS) was doped with halloysite nanotubes (HNTs), and the PDMS-HNT composite surfaces were coated with PDMS-b-polyethylene oxide (PEO) and antibacterials. The composite material properties were examined using SEM, energy dispersive spectroscopy, water contact angle measurements, tensile testing, UV-Vis spectroscopy, and thermal gravimetric analysis. The antibacterial potential of the PDMS-HNT composites was compared to commercial urinary catheters using cultures of E. coli and S. aureus. Fibrinogen adsorption studies were also performed on the PDMS-HNT-PEO composites. Results HNT addition increased drug load during solvent swelling without reducing material strength. The hydrophilic properties provided by PEO were maintained after HNT addition, and the composites displayed protein-repelling properties. Additionally, composites showed superiority over commercial catheters at inhibiting bacterial growth. Conclusion PDMS-HNT composites showed superiority regarding their efficacy at inhibiting bacterial growth, in comparison to commercial antibacterial catheters. Our data suggest that PDMS-HNT composites have potential as a coating material for anti-bacterial invasive devices and in the prevention of institutional-acquired infections.
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Affiliation(s)
- C J Boyer
- Molecular Science and Nanotechnology, College of Engineering & Science, Louisiana Tech University, Ruston, LA, USA
| | - J Ambrose
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA, USA
| | - S Das
- Molecular Science and Nanotechnology, College of Engineering & Science, Louisiana Tech University, Ruston, LA, USA
| | - A Humayun
- Molecular Science and Nanotechnology, College of Engineering & Science, Louisiana Tech University, Ruston, LA, USA
| | - D Chappidi
- Molecular Science and Nanotechnology, College of Engineering & Science, Louisiana Tech University, Ruston, LA, USA
| | - R Giorno
- School of Biological Sciences, Louisiana Tech University, Ruston, LA, USA
| | - D K Mills
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA, USA.,School of Biological Sciences, Louisiana Tech University, Ruston, LA, USA
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Park KL, Ma W, Higaki Y, Takahara A. Mechanically Enhanced Hyaluronic Acid Hybrid Hydrogels with Halloysite Nanotubes. CHEM LETT 2017. [DOI: 10.1246/cl.170484] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kyung-Lynne Park
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
| | - Wei Ma
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
| | - Yuji Higaki
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
- International Institute for Carbon-Neutral Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
| | - Atsushi Takahara
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
- International Institute for Carbon-Neutral Energy Research, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395
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Li K, Jin S, Han Y, Li J, Chen H. Improvement in Functional Properties of Soy Protein Isolate-Based Film by Cellulose Nanocrystal⁻Graphene Artificial Nacre Nanocomposite. Polymers (Basel) 2017; 9:E321. [PMID: 30970998 PMCID: PMC6418927 DOI: 10.3390/polym9080321] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 07/23/2017] [Accepted: 07/25/2017] [Indexed: 12/31/2022] Open
Abstract
A facile, inexpensive, and green approach for the production of stable graphene dispersion was proposed in this study. We fabricated soy protein isolate (SPI)-based nanocomposite films with the combination of 2D negative charged graphene and 1D positive charged polyethyleneimine (PEI)-modified cellulose nanocrystals (CNC) via a layer-by-layer assembly method. The morphologies and surface charges of graphene sheets and CNC segments were characterized by atomic force microscopy and Zeta potential measurements. The hydrogen bonds and multiple interface interactions between the filler and SPI matrix were analyzed by Attenuated Total Reflectance⁻Fourier Transform Infrared spectra and X-ray diffraction patterns. Scanning electron microscopy demonstrated the cross-linked and laminated structures in the fracture surface of the films. In comparison with the unmodified SPI film, the tensile strength and surface contact angles of the SPI/graphene/PEI-CNC film were significantly improved, by 99.73% and 37.13% respectively. The UV⁻visible light barrier ability, water resistance, and thermal stability were also obviously enhanced. With these improved functional properties, this novel bio-nanocomposite film showed considerable potential for application for food packaging materials.
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Affiliation(s)
- Kuang Li
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Shicun Jin
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Yufei Han
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Jianzhang Li
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
| | - Hui Chen
- Key Laboratory of Wood Materials Science and Utilization (Beijing Forestry University), Ministry of Education, Beijing 100083, China.
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China.
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
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Gaaz TS, Kadhum AAH, Michael PKA, Al-Amiery AA, Sulong AB, Nassir MH, Jaaz AH. Unique Halloysite Nanotubes⁻Polyvinyl Alcohol⁻Polyvinylpyrrolidone Composite Complemented with Physico⁻Chemical Characterization. Polymers (Basel) 2017; 9:polym9060207. [PMID: 30970887 PMCID: PMC6431940 DOI: 10.3390/polym9060207] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 05/27/2017] [Accepted: 05/30/2017] [Indexed: 11/18/2022] Open
Abstract
A halloysite nanotubes–polyvinyl alcohol–polyvinylpyrrolidone (HNTs–PVA–PVP) composite has been investigated for a quite long time aiming at improving the physico–chemical characterization of HNTs. In this work, HNTs–PVA–PVP composite were prepared based on a unique procedure characterized by crosslinking two polymers with HNTs. The composite of two polymers were modified by treating HNTs with phosphoric acid (H3PO4) and by using malonic acid (MA) as a crosslinker. The composite was also treated by adding the dispersion agent sodium dodecyl sulfate (SDS). The HNTs–PVA–PVP composite shows better characteristics regarding agglomeration when HNTs is treated in advance by H3PO4. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), brunauer–emmett–teller (BET), size distribution, and atomic force microscopy (AFM) are used to characterize the physio-chemical properties of the composite. FTIR shows additional peaks at 2924.29, 1455.7, and 682.4 cm−1 compared to the neat HNTs due to adding MA. Despite that, the XRD spectra do not show a significant difference, the decrease in peak intensity could be attributed to the addition of semi-crystalline PVA and the amorphous PVP. The images taken by TEM and FESEM show the possible effects of MA on the morphology and internal feature of HNTs–PVA–PVP composite treated by MA by showing the deformation of the matrix. The BET surface area increased to 121.1 m2/g compared to the neat HNTs at 59.1 m2/g. This result, the second highest recorded result, is considered a breakthrough in enhancing the properties of HNTs–PVA–PVP composite, and treatment by MA crosslinking may attribute to the size and the number of the pores. The results from these techniques clearly showed that a significant change has occurred for treated HNTs–PVA–PVP composite where MA was added. The characterization of HNTs–PVA–PVP composite with and without treating HNTs and using crosslinker may lead to a better understanding of this new composites as a precursor to possible applications in the dentistry field.
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Affiliation(s)
- Tayser Sumer Gaaz
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
- Department of Machinery Equipment Engineering Techniques, Technical College Al-Musaib, Al-Furat Al-Awsat Technical University, Al-Musaib, Babil 51009, Iraq.
| | - Abdul Amir H Kadhum
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
| | - Patina Kiah Anak Michael
- Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
| | - Ahmed A Al-Amiery
- Energy and Renewable Energies Technology Centre, University of Technology, Baghdad 10001, Iraq.
| | - Abu Bakar Sulong
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, University Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
| | - Mohamed H Nassir
- Program of Chemical Engineering, Taylor's University-Lakeside Campus, Subang Jaya, Selangor 47500, Malaysia.
| | - Ahed Hameed Jaaz
- Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
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15
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Development of Eco-friendly Soy Protein Isolate Films with High Mechanical Properties through HNTs, PVA, and PTGE Synergism Effect. Sci Rep 2017; 7:44289. [PMID: 28281634 PMCID: PMC5345057 DOI: 10.1038/srep44289] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 02/06/2017] [Indexed: 11/08/2022] Open
Abstract
This study was to develop novel soy protein isolate-based films for packaging using halloysite nanotubes (HNTs), poly-vinyl alcohol (PVA), and 1,2,3-propanetriol-diglycidyl-ether (PTGE). The structural, crystallinity, opacity, micromorphology, and thermal stability of the resultant SPI/HNTs/PVA/PTGE film were analyzed by the Attenuated total reflectance-Fourier transformed infrared (ATR-FTIR) spectroscopy, X-ray diffraction (XRD), UV-Vis spectrophotometry, scanning electron microscopy (SEM), and thermo-gravimetric analysis (TGA). The SPI/HNTs/PVA/PTGE film illustrated that HNTs were uniformly dispersed in the SPI matrix and the thermal stability of the film was enhanced. Furthermore, the tensile strength (TS) of the SPI/HNTs/PVA/PTGE film was increased by 329.3% and the elongation at the break (EB) remained unchanged. The water absorption (WA) and the moisture content (MC) were decreased by 5.1% and 10.4%, respectively, compared to the unmodified film. The results highlighted the synergistic effects of SPI, HNTs, PVA, and PTGE on the mechanical properties, water resistance, and thermal stability of SPI films, which showed excellent strength and flexibility. In short, SPI films prepared from HNTs, PVA, and PTGE showed considerable potential as packaging materials.
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Karnik S, Jammalamadaka UM, Tappa KK, Giorno R, Mills DK. Performance evaluation of nanoclay enriched anti-microbial hydrogels for biomedical applications. Heliyon 2016; 2:e00072. [PMID: 27441251 PMCID: PMC4945899 DOI: 10.1016/j.heliyon.2016.e00072] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 12/31/2015] [Accepted: 01/22/2016] [Indexed: 10/28/2022] Open
Abstract
A major factor contributing to the failure of orthopedic and orthodontic implants is post-surgical infection. Coating metallic implant surfaces with anti-microbial agents has shown promise but does not always prevent the formation of bacterial biofilms. Furthermore, breakdown of these coatings within the human body can cause release of the anti-microbial drugs in an uncontrolled or unpredictable fashion. In this study, we used a calcium alginate and calcium phosphate cement (CPC) hydrogel composite as the base material and enriched these hydrogels with the anti-microbial drug, gentamicin sulfate, loaded within a halloysite nanotubes (HNTs). Our results demonstrate a sustained and extended release of gentamicin from hydrogels enriched with the gentamicin-loaded HNTs. When tested against the gram-negative bacteria, the hydrogel/nanoclay composites showed a pronounced zone of inhibition suggesting that anti-microbial doped nanoclay enriched hydrogels can prevent the growth of bacteria. The release of gentamicin sulfate for a period of five days from the nanoclay-enriched hydrogels would supply anti-microbial agents in a sustained and controlled manner and assist in preventing microbial growth and biofilm formation on the titanium implant surface. A pilot study, using mouse osteoblasts, confirmed that the nanoclay enriched surfaces are also cell supportive as osteoblasts readily, proliferated and produced a type I collagen and proteoglycan matrix.
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Affiliation(s)
- Sonali Karnik
- Department of Biomedical Engineering, Louisiana Tech University, Ruston, LA, USA
| | | | - Karthik K Tappa
- Department of Biomedical Engineering, Louisiana Tech University, Ruston, LA, USA
| | - Rebecca Giorno
- School of Biological Sciences, Louisiana Tech University, Ruston, LA, USA
| | - David K Mills
- Department of Biomedical Engineering, Louisiana Tech University, Ruston, LA, USA; School of Biological Sciences, Louisiana Tech University, Ruston, LA, USA
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Preparation and Characterization of a Bioartificial Polymeric Material: Bilayer of Cellulose Acetate-PVA. INT J POLYM SCI 2016. [DOI: 10.1155/2016/3172545] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A new bioartificial polymeric material consisting of a bilayer of cellulose acetate and poly(vinyl alcohol) was successfully obtained by casting method. The material was characterized by Fourier transform infrared spectroscopy, contact angle, scanning electron microscopy, differential scanning calorimetry, gas permeability, water vapor permeability, and mechanical properties. The characterization indicates that two distinct and well-differentiated surfaces were achieved without detriment to the bulk properties. The interaction between natural and synthetic polymers indeed enhanced the gas permeability as well as the water vapor permeability in comparison to the original components, although mechanical properties were not substantially boosted by the combination of both. Moreover, beyond the interface, there were no detected interactions between the polymers as can be evidenced by the presence of a uniqueTgin the bilayer. The amalgamation of the relatively good mechanical properties with the two differentiated surfaces and the improvement of the permeability properties could indicate the potential of the material for being used in medicine.
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Patel S, Jammalamadaka U, Sun L, Tappa K, Mills DK. Sustained Release of Antibacterial Agents from Doped Halloysite Nanotubes. Bioengineering (Basel) 2015; 3:bioengineering3010001. [PMID: 28952563 PMCID: PMC5597159 DOI: 10.3390/bioengineering3010001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 11/16/2015] [Accepted: 12/16/2015] [Indexed: 01/12/2023] Open
Abstract
The use of nanomaterials for improving drug delivery methods has been shown to be advantageous technically and viable economically. This study employed the use of halloysite nanotubes (HNTs) as nanocontainers, as well as enhancers of structural integrity in electrospun poly-e-caprolactone (PCL) scaffolds. HNTs were loaded with amoxicillin, Brilliant Green, chlorhexidine, doxycycline, gentamicin sulfate, iodine, and potassium calvulanate and release profiles assessed. Selected doped halloysite nanotubes (containing either Brilliant Green, amoxicillin and potassium calvulanate) were then mixed with poly-e-caprolactone (PLC) using the electrospinning method and woven into random and oriented-fibered nanocomposite mats. The rate of drug release from HNTs, HNTs/PCL nanocomposites, and their effect on inhibiting bacterial growth was investigated. Release profiles from nanocomposite mats showed a pattern of sustained release for all bacterial agents. Nanocomposites were able to inhibit bacterial growth for up to one-month with only a slight decrease in bacterial growth inhibition. We propose that halloysite doped nanotubes have the potential for use in a variety of medical applications including sutures and surgical dressings, without compromising material properties.
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Affiliation(s)
- Shraddha Patel
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA 71272, USA.
- Wayne State University, St. John Hospital & Medical Center, 22101 Moross Rd, Detroit, MI 48236, USA.
| | - Uday Jammalamadaka
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA 71272, USA.
| | - Lin Sun
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA 71272, USA.
| | - Karthik Tappa
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA 71272, USA.
| | - David K Mills
- Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Ruston, LA 71272, USA.
- School of Biological Sciences, Louisiana Tech University, Ruston, LA 1272, USA.
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Gaaz TS, Sulong AB, Akhtar MN, Kadhum AAH, Mohamad AB, Al-Amiery AA. Properties and Applications of Polyvinyl Alcohol, Halloysite Nanotubes and Their Nanocomposites. Molecules 2015; 20:22833-47. [PMID: 26703542 PMCID: PMC6332455 DOI: 10.3390/molecules201219884] [Citation(s) in RCA: 252] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 11/27/2015] [Accepted: 12/11/2015] [Indexed: 11/16/2022] Open
Abstract
The aim of this review was to analyze/investigate the synthesis, properties, and applications of polyvinyl alcohol-halloysite nanotubes (PVA-HNT), and their nanocomposites. Different polymers with versatile properties are attractive because of their introduction and potential uses in many fields. Synthetic polymers, such as PVA, natural polymers like alginate, starch, chitosan, or any material with these components have prominent status as important and degradable materials with biocompatibility properties. These materials have been developed in the 1980s and are remarkable because of their recyclability and consideration of the natural continuation of their physical and chemical properties. The fabrication of PVA-HNT nanocomposites can be a potential way to address some of PVA's limitations. Such nanocomposites have excellent mechanical properties and thermal stability. PVA-HNT nanocomposites have been reported earlier, but without proper HNT individualization and PVA modifications. The properties of PVA-HNT for medicinal and biomedical use are attracting an increasing amount of attention for medical applications, such as wound dressings, drug delivery, targeted-tissue transportation systems, and soft biomaterial implants. The demand for alternative polymeric medical devices has also increased substantially around the world. This paper reviews individualized HNT addition along with crosslinking of PVA for various biomedical applications that have been previously reported in literature, thereby showing the attainability, modification of characteristics, and goals underlying the blending process with PVA.
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Affiliation(s)
- Tayser Sumer Gaaz
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
- Department of Machinery Equipment Engineering Techniques, Technical College Al-Musaib, Al-Furat Al-Awsat Technical University, Al-Musaib, Babil 51009, Iraq.
| | - Abu Bakar Sulong
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
| | - Majid Niaz Akhtar
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
- Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan.
| | - Abdul Amir H Kadhum
- Department of chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
| | - Abu Bakar Mohamad
- Department of chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
- Fuel Cell Institute, University Kebangsaan Malaysia (UKM), Bangi, Selangor 43000, Malaysia.
| | - Ahmed A Al-Amiery
- Department of chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor 43600, Malaysia.
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Halum SL, Bijangi-Vishehsaraei K, Zhang H, Sowinski J, Bottino MC. Stem cell-derived tissue-engineered constructs for hemilaryngeal reconstruction. Ann Otol Rhinol Laryngol 2014; 123:124-34. [PMID: 24574468 DOI: 10.1177/0003489414523709] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES As an initial step toward our goal of developing a completely tissue-engineered larynx, the aim of this study was to describe and compare three strategies of creating tissue-engineered muscle-polymer constructs for hemilaryngeal reconstruction. METHODS Cartilage-mimicking polymer was developed from electrospun poly(D,L-lactide-co-ε-caprolactone) (PCL). Primary muscle progenitor cell cultures were derived from syngeneic F344 rat skeletal muscle biopsies. Twenty F344 rats underwent resection of the outer hemilaryngeal cartilage with the underlying laryngeal adductor muscle. The defects were repaired with muscle stem cell-derived muscle-PCL constructs (5 animals), myotube-derived muscle-PCL constructs (5 animals), motor end plate-expressing muscle-PCL constructs (5 animals), or PCL alone (controls; 5 animals). The outcome measures at 1 month included animal survival, muscle thickness, and innervation status as determined by electromyography and immunohistochemistry. RESULTS All of the animals survived the 1-month implant period and had appropriate weight gain. The group that received motor end plate-expressing muscle-PCL constructs demonstrated the greatest muscle thickness and the strongest innervation, according to electromyographic activity and the percentage of motor end plates that had nerve contact. CONCLUSIONS Although all of the tissue-engineered constructs provided effective reconstruction, those that expressed motor end plates before implantation yielded muscle that was more strongly innervated and viable. This finding suggests that this novel approach may be useful in the development of a tissue-engineered laryngeal replacement.
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Affiliation(s)
- Stacey L Halum
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine (Halum, Bijangi-Vishehsaraei, Zhang, Sowinski), Indianapolis, Indiana
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Lin S, Wang RZ, Yi Y, Wang Z, Hao LM, Wu JH, Hu GH, He H. Facile and green fabrication of electrospun poly(vinyl alcohol) nanofibrous mats doped with narrowly dispersed silver nanoparticles. Int J Nanomedicine 2014; 9:3937-47. [PMID: 25170264 PMCID: PMC4145827 DOI: 10.2147/ijn.s64985] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Submicrometer-scale poly(vinyl alcohol) (PVA) nanofibrous mats loaded with aligned and narrowly dispersed silver nanoparticles (AgNPs) are obtained via the electrospinning process from pure water. This facile and green procedure did not need any other chemicals or organic solvents. The doped AgNPs are narrowly distributed, 4.3±0.7 nm and their contents on the nanofabric mats can be easily tuned via in situ ultraviolet light irradiation or under preheating conditions, but with different particle sizes and size distributions. The morphology, loading concentrations, and dispersities of AgNPs embedded within PVA nanofiber mats are characterized by transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, ultraviolet-visible spectra, X-ray photoelectron spectroscopy, and X-ray diffraction, respectively. Moreover, the biocidal activities and cytotoxicity of the electrospun nanofiber mats are determined by zone of inhibition, dynamic shaking method, and cell counting kit (CCK)-8 assay tests.
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Affiliation(s)
- Song Lin
- National Bio-Protection Engineering Centre, Tianjin, People's Republic of China ; Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, People's Republic of China
| | - Run-Ze Wang
- National Bio-Protection Engineering Centre, Tianjin, People's Republic of China ; Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, People's Republic of China
| | - Ying Yi
- National Bio-Protection Engineering Centre, Tianjin, People's Republic of China
| | - Zheng Wang
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, People's Republic of China
| | - Li-Mei Hao
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, People's Republic of China
| | - Jin-Hui Wu
- Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin, People's Republic of China
| | - Guo-Han Hu
- Department of Neurosurgery, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, Shanghai, People's Republic of China
| | - Hua He
- Department of Neurosurgery, Changzheng Hospital, Second Affiliated Hospital of Second Military Medical University, Shanghai, People's Republic of China
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Abstract
Bionanocomposites based on halloysite nanotubes (HNT) as nanofillers and starch as polymer matrix were prepared by melt-extrusion process using glycerol as plasticizer and glycerol monostearate as lubricant. Scanning electron microscopic (SEM) images show homogenous dispersion of HNTs in starch matrix. A Fourier transform infrared analysis (FTIR) reveals the interaction between external hydroxyl groups of HNTs with C–O–C groups of starch. Upon halloysite addition, storage modulus, Young modulus and tensile strength increase without loss of ductility.
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