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Azadpour B, Aharipour N, Paryab A, Omid H, Abdollahi S, Madaah Hosseini H, Malek Khachatourian A, Toprak MS, Seifalian AM. Magnetically-assisted viral transduction (magnetofection) medical applications: An update. Biomater Adv 2023; 154:213657. [PMID: 37844415 DOI: 10.1016/j.bioadv.2023.213657] [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] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/23/2023] [Accepted: 10/06/2023] [Indexed: 10/18/2023]
Abstract
Gene therapy involves replacing a faulty gene or adding a new gene inside the body's cells to cure disease or improve the body's ability to fight disease. Its popularity is evident from emerging concepts such as CRISPR-based genome editing and epigenetic studies and has been moved to a clinical setting. The strategy for therapeutic gene design includes; suppressing the expression of pathogenic genes, enhancing necessary protein production, and stimulating the immune system, which can be incorporated into both viral and non-viral gene vectors. Although non-viral gene delivery provides a safer platform, it suffers from an inefficient rate of gene transfection, which means a few genes could be successfully transfected and expressed within the cells. Incorporating nucleic acids into the viruses and using these viral vectors to infect cells increases gene transfection efficiency. Consequently, more cells will respond, more genes will be expressed, and sustained and successful gene therapy can be achieved. Combining nanoparticles (NPs) and nucleic acids protects genetic materials from enzymatic degradation. Furthermore, the vectors can be transferred faster, facilitating cell attachment and cellular uptake. Magnetically assisted viral transduction (magnetofection) enhances gene therapy efficiency by mixing magnetic nanoparticles (MNPs) with gene vectors and exerting a magnetic field to guide a significant number of vectors directly onto the cells. This research critically reviews the MNPs and the physiochemical properties needed to assemble an appropriate magnetic viral vector, discussing cellular hurdles and attitudes toward overcoming these barriers to reach clinical gene therapy perspectives. We focus on the studies conducted on the various applications of magnetic viral vectors in cancer therapies, regenerative medicine, tissue engineering, cell sorting, and virus isolation.
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Affiliation(s)
- Behnam Azadpour
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Nazli Aharipour
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Amirhosein Paryab
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Hamed Omid
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Sorosh Abdollahi
- Department of Biomedical Engineering, University of Calgary, Alberta, Canada
| | | | | | - Muhammet S Toprak
- Department of Applied Physics, KTH-Royal Institute of Technology, SE10691 Stockholm, Sweden
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd, Nanoloom Ltd, & Liberum Health Ltd), London BioScience Innovation Centre, London, UK.
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Hashemizadeh S, Pourkhodadad S, Hosseindoost S, Pejman S, Kamarehei M, Badripour A, Omidi A, Pestehei SK, Seifalian AM, Hadjighassem M. Ac-SDKP peptide improves functional recovery following spinal cord injury in a preclinical model. Neuropeptides 2022; 92:102228. [PMID: 35101843 DOI: 10.1016/j.npep.2022.102228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 12/16/2021] [Accepted: 01/11/2022] [Indexed: 02/08/2023]
Abstract
Damage to the spinal cord triggers a local complex inflammatory reaction that results in irreversible impairments or complete loss of motor function. The evidence suggested that inhibiting the pro-inflammatory macrophage/microglia (M1 subsets) and stimulating the anti-inflammatory macrophage/microglia (M2 subsets) are potential strategies for the treatment of neuroinflammation-related diseases. We evaluated the potentially protective effect of Ac-SDKP as an endogenous tetrapeptide on rat spinal cord injury (SCI). Wistar rats were subjected to a weight-drop contusion model and were treated with Ac-SDKP (0.8 mg/kg) given subcutaneously once a day for 7 days starting at two clinically relevant times, at 2 h or 6 h post-injury. The effect of Ac-SDKP was assessed by motor functional analysis, real-time PCR (CD86 and CD206 mRNA), western blot (caspase-3), ELISA (TNF-a, IL-10), and histological analysis (toluidine blue staining). Ac-SDKP improved locomotor recovery and rescue motor neuron loss after SCI. Moreover, a decreased in TNF-a level as well as caspase 3 protein levels occurred in the lesion epicenter of the spinal cord following treatment. In addition, CD206 mRNA expression level increased significantly in Ac-SDKP treated rats compared with SCI. Together these data suggest that Ac-SDKP might be a novel immunomodulatory drug. It may be beneficial for the treatment of SCI with regards to increasing CD206 gene expression and suppress inflammatory cytokine to improve motor function and reducing histopathological lesion.
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Affiliation(s)
- Shiva Hashemizadeh
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Saereh Hosseindoost
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sina Pejman
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Maryam Kamarehei
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Abolfazl Badripour
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.; Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ameneh Omidi
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Seyed Khalil Pestehei
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran.; Department of Anesthesiology, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, United Kingdom
| | - Mahmoudreza Hadjighassem
- Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.; Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran..
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Aleemardani M, Zare P, Seifalian A, Bagher Z, Seifalian AM. Graphene-Based Materials Prove to Be a Promising Candidate for Nerve Regeneration Following Peripheral Nerve Injury. Biomedicines 2021; 10:73. [PMID: 35052753 PMCID: PMC8773001 DOI: 10.3390/biomedicines10010073] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/27/2021] [Accepted: 12/28/2021] [Indexed: 12/16/2022] Open
Abstract
Peripheral nerve injury is a common medical condition that has a great impact on patient quality of life. Currently, surgical management is considered to be a gold standard first-line treatment; however, is often not successful and requires further surgical procedures. Commercially available FDA- and CE-approved decellularized nerve conduits offer considerable benefits to patients suffering from a completely transected nerve but they fail to support neural regeneration in gaps > 30 mm. To address this unmet clinical need, current research is focused on biomaterial-based therapies to regenerate dysfunctional neural tissues, specifically damaged peripheral nerve, and spinal cord. Recently, attention has been paid to the capability of graphene-based materials (GBMs) to develop bifunctional scaffolds for promoting nerve regeneration, often via supporting enhanced neural differentiation. The unique features of GBMs have been applied to fabricate an electroactive conductive surface in order to direct stem cells and improve neural proliferation and differentiation. The use of GBMs for nerve tissue engineering (NTE) is considered an emerging technology bringing hope to peripheral nerve injury repair, with some products already in preclinical stages. This review assesses the last six years of research in the field of GBMs application in NTE, focusing on the fabrication and effects of GBMs for neurogenesis in various scaffold forms, including electrospun fibres, films, hydrogels, foams, 3D printing, and bioprinting.
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Affiliation(s)
- Mina Aleemardani
- Biomaterials and Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, The University of Sheffield, Sheffield S3 7HQ, UK;
| | - Pariya Zare
- Department of Chemical Engineering, University of Tehran, Tehran 1417935840, Iran;
| | - Amelia Seifalian
- Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK;
| | - Zohreh Bagher
- ENT and Head and Neck Research Centre, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran 16844, Iran
| | - Alexander M. Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (NanoRegMed Ltd.), London BioScience Innovation Centre, London NW1 0NH, UK
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Najafloo R, Majidi J, Asghari A, Aleemardani M, Kamrava SK, Simorgh S, Seifalian A, Bagher Z, Seifalian AM. Mechanism of Anosmia Caused by Symptoms of COVID-19 and Emerging Treatments. ACS Chem Neurosci 2021; 12:3795-3805. [PMID: 34609841 PMCID: PMC8507153 DOI: 10.1021/acschemneuro.1c00477] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 07/16/2021] [Accepted: 09/20/2021] [Indexed: 01/08/2023] Open
Abstract
The occurrence of anosmia, the loss or change in sense of smell, is one of the most common symptoms of COVID-19 experienced by almost 53% of those affected. Several hypotheses explain the mechanism of anosmia in patients suffering from COVID-19. This study aims to review the related mechanisms and answer the questions regarding COVID-19-related anosmia as well as propose a new strategy for treatment of long-term anosmia as a result of COVID-19 infection. This paper covers all of the studies investigating olfactory disorders following COVID-19 infection and explains the possible reasons for the correlated anosmia, including olfactory cleft syndrome, local inflammation in the nasal epithelium, early apoptosis of olfactory cells, changes in olfactory cilia and odor transmission, damage to microglial cells, effect on olfactory bulbs, epithelial olfactory injury, and impairment of olfactory neurons and stem cells. The key questions that arise in this field have been discussed, such as why prevalent anosmia is varied among the age categories and among sexes and the correlation of anosmia with mild or severe COVID-19 infection. The angiotensin-converting enzyme 2 receptor is a significant player in the mechanism of anosmia in COVID-19 patients. Based on current studies, a novel approach to treat long-COVID-19 with ongoing anosmia has been proposed. The fields of smart drug delivery, tissue engineering, and cell therapy provide a hypothesized strategy that can minimize the side effects of current treatments and support efficient recovery of the olfactory system.
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Affiliation(s)
- Raziyeh Najafloo
- Department
of Tissue Engineering & Regenerative Medicine, Faculty of Advanced
Technologies in Medicine, Iran University
of Medical Sciences (IUMS), Tehran 1449614535, Iran
| | - Jila Majidi
- Department
of Tissue Engineering & Regenerative Medicine, Faculty of Advanced
Technologies in Medicine, Iran University
of Medical Sciences (IUMS), Tehran 1449614535, Iran
| | - Alimohamad Asghari
- Skull
Base Research Center, Hazrat Rasoul Akram Hospital, The Five Senses
Health Institute, Iran University of Medical
Sciences (IUMS), Tehran 1445613131, Iran
| | - Mina Aleemardani
- Biomaterials
and Tissue Engineering Group, Department of Materials Science and
Engineering, Kroto Research Institute, The
University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Seyed Kamran Kamrava
- ENT
and Head and Neck Research Center and Department, Hazrat Rasoul Akram
Hospital, The Five Senses Health Institute, Iran University of Medical Sciences (IUMS), Tehran 1445613131, Iran
| | - Sara Simorgh
- Department
of Tissue Engineering & Regenerative Medicine, Faculty of Advanced
Technologies in Medicine, Iran University
of Medical Sciences (IUMS), Tehran 1449614535, Iran
| | - Amelia Seifalian
- University
College London Medical School (UCL), London WC1E 6BT, United
Kingdom
- Watford
General Hospital, Watford WD18 0HB, United Kingdom
| | - Zohreh Bagher
- Department
of Tissue Engineering & Regenerative Medicine, Faculty of Advanced
Technologies in Medicine, Iran University
of Medical Sciences (IUMS), Tehran 1449614535, Iran
- ENT
and Head and Neck Research Center and Department, Hazrat Rasoul Akram
Hospital, The Five Senses Health Institute, Iran University of Medical Sciences (IUMS), Tehran 1445613131, Iran
| | - Alexander M. Seifalian
- Nanotechnology
and Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd.), London BioScience Innovation Centre, London NW1 0NH, United Kingdom
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5
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Ebrahimi Sadrabadi A, Bereimipour A, Jalili A, Gholipurmalekabadi M, Farhadihosseinabadi B, Seifalian AM. The risk of pancreatic adenocarcinoma following SARS-CoV family infection. Sci Rep 2021; 11:12948. [PMID: 34155232 PMCID: PMC8217230 DOI: 10.1038/s41598-021-92068-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/03/2021] [Accepted: 06/04/2021] [Indexed: 02/05/2023] Open
Abstract
COVID 19 disease has become a global catastrophe over the past year that has claimed the lives of over two million people around the world. Despite the introduction of vaccines against the disease, there is still a long way to completely eradicate it. There are concerns about the complications following infection with SARS-CoV-2. This research aimed to evaluate the possible correlation between infection with SARS-CoV viruses and cancer in an in-silico study model. To do this, the relevent dataset was selected from GEO database. Identification of differentially expressed genes among defined groups including SARS-CoV, SARS-dORF6, SARS-BatSRBD, and H1N1 were screened where the |Log FC| ≥ 1and p < 0.05 were considered statistically significant. Later, the pathway enrichment analysis and gene ontology (GO) were used by Enrichr and Shiny GO databases. Evaluation with STRING online was applied to predict the functional interactions of proteins, followed by Cytoscape analysis to identify the master genes. Finally, analysis with GEPIA2 server was carried out to reveal the possible correlation between candidate genes and cancer development. The results showed that the main molecular function of up- and down-regulated genes was "double-stranded RNA binding" and actin-binding, respectively. STRING and Cytoscape analysis presented four genes, PTEN, CREB1, CASP3, and SMAD3 as the key genes involved in cancer development. According to TCGA database results, these four genes were up-regulated notably in pancreatic adenocarcinoma. Our findings suggest that pancreatic adenocarcinoma is the most probably malignancy happening after infection with SARS-CoV family.
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Affiliation(s)
- Amin Ebrahimi Sadrabadi
- Department of Stem Cells and Developmental Biology at Cell Science Research Centre, Royan Institute, Tehran, Iran
| | - Ahmad Bereimipour
- Department of Stem Cells and Developmental Biology at Cell Science Research Centre, Royan Institute, Tehran, Iran
- Faculty of Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
| | - Arsalan Jalili
- Department of Stem Cells and Developmental Biology at Cell Science Research Centre, Royan Institute, Tehran, Iran
- Parvaz Research Ideas Supporter Institute, Tehran, Iran
| | - Mazaher Gholipurmalekabadi
- Cellular and Molecular Research Centre, Department of Tissue Engineering and Regenerative Medicine, Iran University of Medical Sciences, Tehran, Iran
- Department of Medical Biotechnology, Iran University of Medical Sciences, Tehran, Iran
| | | | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (Ltd), London BioScience Innovation Centre, London, UK.
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6
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Tavakol S, Alavijeh MS, Seifalian AM. COVID-19 Vaccines in Clinical Trials and their Mode of Action for Immunity against the Virus. Curr Pharm Des 2021; 27:1553-1563. [PMID: 33100195 DOI: 10.2174/1381612826666201023143956] [Citation(s) in RCA: 11] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/10/2020] [Accepted: 09/25/2020] [Indexed: 11/22/2022]
Abstract
For nearly two decades, coronaviruses have caused many health and economic problems, while no effective commercial vaccine has yet been developed. It is worth mentioning that despite some mutations and recombination in SARS-CoV-2, its genotype is very close to the original strain from Wuhan, China. Therefore, the development of an effective vaccine would be promising. It might be hypothesized that BCG vaccination is performed in high-risk populations before the commercialization of an effective SARS-CoV-2 vaccine. However, the development of an effective vaccine without considering the adverse immune reactions derived from antibody-dependent or cell-based immune enhancement may threaten vaccinated people's lives and long-term side effects must be considered. To this end, targeting of the receptor-binding domain (RBD) in spike and not whole spike, glycolization of FC receptors, PD-1 blockers, CPPs, etc., are promising. Therefore, the subunit vaccines or RNA vaccines that encode the RBP segment of the spike are of interest. To enhance the vaccine efficacy, its co-delivery with an adjuvant has been recommended. Nanoparticles modulate immune response with higher efficiency than the soluble form of antigens and can be functionalized with the positively charged moieties and ligands of targeted cells, such as dendritic cells, to increase cellular uptake of the antigens and their presentation on the surface of immune cells. This research aimed to discuss the COVID-19 vaccines entering the clinical trial and their mode of action effective immunity against the virus and discusses their advantages compared to each other.
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Affiliation(s)
- Shima Tavakol
- Pharmidex Pharmaceutical Services Ltd., London, United Kingdom
| | - Mo S Alavijeh
- Pharmidex Pharmaceutical Services Ltd., London, United Kingdom
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, United Kingdom
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Tavakol S, Seifalian AM. Vitamin E at a high dose as an anti-ferroptosis drug and not just a supplement for COVID-19 treatment. Biotechnol Appl Biochem 2021; 69:1058-1060. [PMID: 33938041 PMCID: PMC8239546 DOI: 10.1002/bab.2176] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/22/2021] [Indexed: 12/12/2022]
Affiliation(s)
- Shima Tavakol
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (NanoRegMed Ltd), London BioScience Innovation Centre, London, UK
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Zare P, Aleemardani M, Seifalian A, Bagher Z, Seifalian AM. Graphene Oxide: Opportunities and Challenges in Biomedicine. Nanomaterials (Basel) 2021; 11:nano11051083. [PMID: 33922153 PMCID: PMC8143506 DOI: 10.3390/nano11051083] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 02/07/2023]
Abstract
Desirable carbon allotropes such as graphene oxide (GO) have entered the field with several biomedical applications, owing to their exceptional physicochemical and biological features, including extreme strength, found to be 200 times stronger than steel; remarkable light weight; large surface-to-volume ratio; chemical stability; unparalleled thermal and electrical conductivity; and enhanced cell adhesion, proliferation, and differentiation properties. The presence of functional groups on graphene oxide (GO) enhances further interactions with other molecules. Therefore, recent studies have focused on GO-based materials (GOBMs) rather than graphene. The aim of this research was to highlight the physicochemical and biological properties of GOBMs, especially their significance to biomedical applications. The latest studies of GOBMs in biomedical applications are critically reviewed, and in vitro and preclinical studies are assessed. Furthermore, the challenges likely to be faced and prospective future potential are addressed. GOBMs, a high potential emerging material, will dominate the materials of choice in the repair and development of human organs and medical devices. There is already great interest among academics as well as in pharmaceutical and biomedical industries.
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Affiliation(s)
- Pariya Zare
- Department of Chemical Engineering, University of Tehran, Tehran 1417466191, Iran;
| | - Mina Aleemardani
- Biomaterials and Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, The University of Sheffield, Sheffield S3 7HQ, UK;
| | - Amelia Seifalian
- Watford General Hospital, Watford WD18 0HB, UK;
- UCL Medical School, University College London, London WC1E 6BT, UK
| | - Zohreh Bagher
- ENT and Head and Neck Research Centre and Department, Hazrat Rasoul Akram Hospital, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran 1445413131, Iran
- Correspondence: (Z.B.); (A.M.S.); Tel.: +44-(0)-2076911122 (A.M.S.)
| | - Alexander M. Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd.), London BioScience Innovation Centre, London NW1 0NH, UK
- Correspondence: (Z.B.); (A.M.S.); Tel.: +44-(0)-2076911122 (A.M.S.)
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Tashnizi MA, Maleki MH, Javedanfar O, Damsaz M, Alamdari AH, Seifalian AM, Asadi M, Hamidi Alamdari D. Platelet-rich plasma fibrin glue for treatment of chylothorax following cavopulmonary connections. Eur J Cardiothorac Surg 2020; 58:1269-1273. [PMID: 32808042 DOI: 10.1093/ejcts/ezaa243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/08/2020] [Accepted: 06/02/2020] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The postoperative persistence of chylothorax is a fatal complication of paediatric cardiac surgery. There is an urgent need for an effective treatment of chylothorax. This study reports the application of allogenic platelet-rich plasma fibrin glue (PRP-FG) as a conservative therapy before reoperation. METHODS Over a 9-year period, from 2010 to 2019, 27 patients with persistent chylothorax following a cavopulmonary connection, with a mean latency period of 11 days (range 10-15 days), were treated with PRP-FG. These patients were selected because they had not responded positively to initial conservative management plans. The patients were followed up for 9 years. RESULTS Twenty-five patients (92%) responded positively to treatment with PRP-FG; 2 patients did not respond to the treatment and died after reoperation. All of the successfully treated patients in follow-up continued to live a healthy life without further complications. CONCLUSIONS Recalcitrant chylothorax that persists after paediatric cardiac surgery responded positively to treatment with PRP-FG. This technique precluded the need for another operation and significantly decreased the morbidity and mortality rates.
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Affiliation(s)
- Mohhamad Abbasi Tashnizi
- Department of Cardiac Surgery, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmood Hossinzadeh Maleki
- Department of Cardiac Surgery, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Omid Javedanfar
- Department of Cardiac Surgery, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammadamin Damsaz
- Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Aida Hamidi Alamdari
- Research Committee, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation Centre, London BioScience Innovation Centre, London, UK
| | - Mehdi Asadi
- Surgical Oncology Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Sadeghi D, Solouk A, Samadikuchaksaraei A, Seifalian AM. Preparation of internally-crosslinked alginate microspheres: Optimization of process parameters and study of pH-responsive behaviors. Carbohydr Polym 2020; 255:117336. [PMID: 33436179 DOI: 10.1016/j.carbpol.2020.117336] [Citation(s) in RCA: 8] [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] [Received: 04/13/2020] [Revised: 10/25/2020] [Accepted: 10/27/2020] [Indexed: 02/07/2023]
Abstract
In this study, the effects of various parameters of the water-in-oil emulsification/internal gelation method on the properties of calcium-alginate microparticles were evaluated and optimized. Results showed that the spherical-shaped microparticles with the highest circularity and high production yield can be produced by alginate solution with a concentration of 2 wt.%, calcium carbonate/alginate ratio of 10/1 (w/w), water/oil volume ratio of 1/20, emulsifier concentration of 5 % (v/v), and emulsification speed of 1000 rpm. Two model drugs including simvastatin lactone and simvastatin β-hydroxyacid were loaded into the microspheres with promising encapsulation efficiencies of 73 % and 69 %, respectively. The microspheres showed a pH-responsive swelling behavior with a percentage of 10.60 %, 352.65 %, 690.03 %, and 1211.46 % at the pH values of 2.0, 4.5, 7.4, and 8.5, respectively. The microspheres showed an increasing trend of release rate in direct proportion to pH. These findings would be useful for therapeutic applications which need pH-responsive drug carriers.
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Affiliation(s)
- Davoud Sadeghi
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Atefeh Solouk
- Biomedical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
| | - Ali Samadikuchaksaraei
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Medical Biotechnology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Centre (Ltd), London BioScience Innovation Centre, London, United Kingdom
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11
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Vardiani M, Ghaffari Novin M, Koruji M, Nazarian H, Goossens E, Aghaei A, Seifalian AM, Ghasemi Hamidabadi H, Asgari F, Gholipourmalekabadi M. Gelatin Electrospun Mat as a Potential Co-culture System for In Vitro Production of Sperm Cells from Embryonic Stem Cells. ACS Biomater Sci Eng 2020; 6:5823-5832. [PMID: 33320586 DOI: 10.1021/acsbiomaterials.0c00893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/29/2022]
Abstract
Engineering of 3D substrates with maximum similarity to seminiferous tubules would help to produce functional sperm cells in vitro from stem cells. Here, we present a 3D electrospun gelatin (EG) substrate seeded with Sertoli cells and determine its potential for guided differentiation of embryonic stem cells (ESCs) toward germline cells. The EG was fabricated by electrospinning, and its morphology under SEM, as well as cytobiocompatibility for Sertoli cells and ESCs, was confirmed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide and cell attachment assay. Embryoid bodies (EBs) were formed from ESCs and co-cultured with Sertoli cells, induced with BMP4 for 3 and 7 consecutive days to induce the differentiation of EBs toward germline cells. The differentiation was investigated by immunocytochemistry (ICC), flow cytometry, and RT-PCR in four experimental groups of EBs (EBs cultured in gelatin-coated cell culture plates); Scaffold/EB (EBs cultured on EG); ESCs/Ser (EBs and Sertoli cells co-cultured on gelatin-coated cell culture plates without EG); and Scaffold/EB/Ser (EBs and Sertoli cells co-cultured on EG). All experimental groups exhibited a significantly increased MVH (germline-specific marker) and decreased c-KIT (stemness marker) expression when compared with the EB group. ICC and flow cytometry revealed that Scaffold/EB/Ser had the highest level of MVH and the lowest c-KIT expression at both 3 and 7 days postdifferentiation compared with other groups. RT-PCR results showed a significant increase in the germline marker (Dazl) and a significant decrease in the ESC stemness marker (Nanog) in Scaffold/EB compared to the EB group. The germline markers Gcna, Stella, Mvh, Stra8, Piwil2, and Dazl were significantly increased in Scaffold/EB/Ser compared to the Scaffold/EB group. Our findings revealed that the EG scaffold can provide an excellent substrate biomimicking the micro/nanostructure of native seminiferous tubules and a platform for Sertoli cell-EB communication required for growth and differentiation of ESCs into germline cells.
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Affiliation(s)
- Mina Vardiani
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran.,Reproductive Biotechnology Research Center, Aviccena Research Institute, ACECR, 14115-343 Tehran, Iran.,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran
| | - Marefat Ghaffari Novin
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran.,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran
| | - Morteza Koruji
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, 14496-14535 Tehran, Iran.,Department of Anatomical Sciences, Iran University of Medical Sciences, 14496-14535 Tehran, Iran
| | - Hamid Nazarian
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran.,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran
| | - Ellen Goossens
- Biology of the Testis Research Group, Vrije Universiteit Brussel, 1090 Brussels, Belgium
| | - Abbas Aghaei
- Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran.,Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, 19839-63113 Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (Ltd.), The London BioScience Innovation Centre, NW1 0NH London, United Kingdom
| | - Hatef Ghasemi Hamidabadi
- Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, 2093716496 Sari, Iran.,Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, 2093716496 Sari, Iran
| | - Fatemeh Asgari
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, 14496-14535 Tehran, Iran.,Department of Anatomical Sciences, Iran University of Medical Sciences, 14496-14535 Tehran, Iran
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, 14496-14535 Tehran, Iran.,Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, 14496-14535 Tehran, Iran
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12
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Sarvari R, Nouri M, Agbolaghi S, Roshangar L, Sadrhaghighi A, Seifalian AM, Keyhanvar P. A summary on non-viral systems for gene delivery based on natural and synthetic polymers. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1825081] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Raana Sarvari
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Stem Cell And Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Nouri
- Department of Reproductive Biology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samira Agbolaghi
- Chemical Engineering Department, Faculty of Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Laila Roshangar
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Amirhouman Sadrhaghighi
- Department of Orthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alexander M. Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (Ltd), The London Innovation Bio Science Centre, London, UK
| | - Peyman Keyhanvar
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Medical Nanotechnology, School of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
- Convergence of Knowledge, Technology and Society Network (CKTSN), Universal Scientific Education and Research Network (USERN), Tabriz, Iran
- ARTAN110 Startup Accelerator, Tabriz, Iran
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13
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Aliakbar Ahovan Z, Khosravimelal S, Eftekhari BS, Mehrabi S, Hashemi A, Eftekhari S, Brouki Milan P, Mobaraki M, Seifalian AM, Gholipourmalekabadi M. Thermo-responsive chitosan hydrogel for healing of full-thickness wounds infected with XDR bacteria isolated from burn patients: In vitro and in vivo animal model. Int J Biol Macromol 2020; 164:4475-4486. [PMID: 32888993 DOI: 10.1016/j.ijbiomac.2020.08.239] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 07/04/2020] [Revised: 08/24/2020] [Accepted: 08/30/2020] [Indexed: 12/14/2022]
Abstract
Treatment of non-healing skin wounds infected with extensively drug-resistant (XDR) bacteria remains as a big challenge. To date, different biomaterials have been applied for treatment of post-wound infections, nevertheless their efficacy for treatment of the wounds infected with XDR isolates has not been determined yet. In this study, the potential of the thermo-responsive chitosan (TCTS) hydrogel for protection of full-thickness wounds XDR bacteria isolated from burn patients was evaluated both in vitro and in vivo in a rat model. Antibacterial activity of the TCTS hydrogel against standard strain and clinical isolates of Acinetobacter baumannii, cytobiocompatibility for Hu02 fibroblast cells, degradation rate and swelling ratio were determined in vitro. MTT assay and disk diffusion test indicated no detectable cytotoxicity and antibacterial activity in vitro, respectively. In vivo study showed significant acceleration of wound healing, re-epithelialization, wound closure, and decreased colony count in the TCTS hydrogel group compared with control. This study suggests TCTS hydrogel as an excellent wound dressing for management of the wounds infected with XDR bacteria, and now promises to proceed with clinical investigations.
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Affiliation(s)
- Zahra Aliakbar Ahovan
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sadjad Khosravimelal
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran; Department of Medical Biotechnology, Faculty of Allied Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Behnaz Sadat Eftekhari
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran; Department of Physiology and Institute for Medicine and Engineering, University of Pennsylvania, USA
| | - Soraya Mehrabi
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran; Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ali Hashemi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Samane Eftekhari
- Department of Medical Biotechnology, Faculty of Allied Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Peiman Brouki Milan
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | | | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (Ltd), The London BioScience Innovation Centre, London, United Kingdom.
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.
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14
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Sheykhhasan M, Wong JKL, Seifalian AM. Human Adipose-Derived Stem Cells with Great Therapeutic Potential. Curr Stem Cell Res Ther 2020; 14:532-548. [PMID: 30973112 DOI: 10.2174/1574888x14666190411121528] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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: 06/12/2018] [Revised: 03/05/2019] [Accepted: 03/15/2019] [Indexed: 02/08/2023]
Abstract
The potential use of stem cell-based therapies for the repair and regeneration of various tissues and organs offers a paradigm shift in regenerative medicine. The use of either embryonic stem cells (ESC) or induced pluripotent stem cells (iPSC) in clinical situations is limited because of regulations and ethical considerations even though these cells are theoretically highly beneficial. While clinically, adipose-derived stem cells (ADSCs) are one of the most widely used types of stem cells used more than five years in clinically setting. It has many advantages including; yields a high number of ADSCs per volume of tissue, high rate of proliferation, anti-fibrotic, anti-apoptotic, anti-inflammation, immunomodulation, and paracrine mechanisms have been demonstrated in various preclinical studies. It is much easier to harvest compared with bone marrow stem cells. Results of clinical studies have demonstrated the potentials of ADSCs for stem cells therapy for a number of clinical disorders. The aim of this paper was to provide an update on the most recent developments of ADSCs, by highlighting the properties and features of ADSCs, critically discussing its clinical benefit and its clinical trials in treatment and regeneration. This is a multi-billion dollars industry with huge interest to clinician, academia and industries.
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Affiliation(s)
- Mohsen Sheykhhasan
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.,Department of Mesenchymal Stem Cell, The Academic Centre for Education, Culture and Research, Qom, Iran
| | - Joanna K L Wong
- Imperial College School of Medicine, Imperial College London, London, United Kingdom
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Centre (Ltd), The London Innovation BioScience Centre, London, United Kingdom
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15
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Ovcharenko EA, Seifalian A, Rezvova MA, Klyshnikov KY, Glushkova TV, Akenteva TN, Antonova LV, Velikanova EA, Chernonosova VS, Shevelev GY, Shishkova DK, Krivkina EO, Kudryavceva YA, Seifalian AM, Barbarash LS. A New Nanocomposite Copolymer Based On Functionalised Graphene Oxide for Development of Heart Valves. Sci Rep 2020; 10:5271. [PMID: 32210287 PMCID: PMC7093488 DOI: 10.1038/s41598-020-62122-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [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: 07/25/2019] [Accepted: 03/09/2020] [Indexed: 11/09/2022] Open
Abstract
Polymeric heart valves seem to be an attractive alternative to mechanical and biological prostheses as they are more durable, due to the superior properties of novel polymers, and have the biocompatibility and hemodynamics comparable to tissue substitutes. This study reports a comprehensive assessment of a nanocomposite based on the functionalised graphene oxide and poly(carbonate-urea)urethane with the trade name "Hastalex" in comparison with GORE-TEX, a commercial polymer routinely used for cardiovascular medical devices. Experimental data have proved that GORE-TEX has a 2.5-fold (longitudinal direction) and 3.5-fold (transverse direction) lower ultimate tensile strength in comparison with Hastalex (p < 0.05). The contact angles of Hastalex surfaces (85.2 ± 1.1°) significantly (p < 0.05) are lower than those of GORE-TEX (127.1 ± 6.8°). The highest number of viable cells Ea.hy 926 is on the Hastalex surface exceeding 7.5-fold when compared with the GORE-TEX surface (p < 0.001). The platelet deformation index for GORE-TEX is 2-fold higher than that of Hastalex polymer (p < 0.05). Calcium content is greater for GORE-TEX (8.4 mg/g) in comparison with Hastalex (0.55 mg/g). The results of this study have proven that Hastalex meets the main standards required for manufacturing artificial heart valves and has superior mechanical, hemocompatibility and calcific resistance properties in comparison with GORE-TEX.
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Affiliation(s)
- Evgeny A Ovcharenko
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation.
| | - Amelia Seifalian
- UCL Medical School, University College London, London, United Kingdom
| | - Maria A Rezvova
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation.
| | - Kirill Yu Klyshnikov
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Tatiana V Glushkova
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Tatyana N Akenteva
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Larisa V Antonova
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Elena A Velikanova
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Vera S Chernonosova
- Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russian Federation
| | - Georgy Yu Shevelev
- Institute of Chemical Biology and Fundamental Medicine, Novosibirsk, Russian Federation
| | - Darya K Shishkova
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Evgeniya O Krivkina
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Yuliya A Kudryavceva
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
| | - Alexander M Seifalian
- NanoRegMed Ltd (Nanotechnology and Regenerative Medicine Commercialization Centre), London BioScience Innovation Centre, London, United Kingdom
| | - Leonid S Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases, Kemerovo, Russian Federation
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16
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Nilforoushzadeh MA, Sisakht MM, Amirkhani MA, Seifalian AM, Banafshe HR, Verdi J, Nouradini M. Engineered skin graft with stromal vascular fraction cells encapsulated in fibrin–collagen hydrogel: A clinical study for diabetic wound healing. J Tissue Eng Regen Med 2020; 14:424-440. [DOI: 10.1002/term.3003] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 11/18/2019] [Accepted: 12/06/2019] [Indexed: 12/20/2022]
Affiliation(s)
| | - Mahsa Mollapour Sisakht
- Skin and Stem Cell Research CenterTehran University of Medical Sciences Tehran Iran
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
| | - Mohammad Amir Amirkhani
- Stem Cell and Regenerative Medicine Center of ExcellenceTehran University of Medical Sciences Tehran Iran
| | - Alexander M. Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd)The London BioScience Innovation Centre London UK
| | - Hamid Reza Banafshe
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
- Physiology Research CenterKashan University of Medical Sciences Kashan Iran
| | - Javad Verdi
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in MedicineTehran University of Medical Sciences Tehran Iran
| | - Mehdi Nouradini
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
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17
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Naderi N, Griffin MF, Mosahebi A, Butler PE, Seifalian AM. Adipose derived stem cells and platelet rich plasma improve the tissue integration and angiogenesis of biodegradable scaffolds for soft tissue regeneration. Mol Biol Rep 2020; 47:2005-2013. [PMID: 32072400 PMCID: PMC7688190 DOI: 10.1007/s11033-020-05297-7] [Citation(s) in RCA: 24] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 01/31/2020] [Indexed: 11/30/2022]
Abstract
Current surgical reconstruction for soft tissue replacement involves lipotransfer to restore soft tissue replacements but is limited by survival and longevity of the fat tissue. Alternative approaches to overcome these limitations include using biodegradable scaffolds with stem cells with growth factors to generate soft tissue. Adipose derived stem cells (ADSCs) offer great potential to differentiate into adipose, and can be delivered using biodegradable scaffolds. However, the optimal scaffold to maximise this approach is unknown. This study investigates the biocompatibility of nanocomposite scaffolds (POSS-PCL) to deliver ADSCs with and without the addition of growth factors using platelet rich plasma (PRP) in vivo. Rat ADSCs were isolated and then seeded on biodegradable scaffolds (POSS-PCL). In addition, donor rats were used to isolate PRP to modify the scaffolds. The implants were then subcutaneously implanted for 3-months to assess the effect of PRP and ADSC on POSS-PCL scaffolds biocompatibility. Histology after explanation was examined to assess tissue integration (H&E) and collagen production (Massons Trichome). Immunohistochemistry was used to assess angiogenesis (CD3, α-SMA), immune response (CD45, CD68) and adipose formation (PPAR-γ). At 3-months PRP-ADSC-POSS-PCL scaffolds demonstrated significantly increased tissue integration and angiogenesis compared to PRP, ADSC and unmodified scaffolds (p < 0.05). In addition, PRP-ADSC-POSS-PCL scaffolds showed similar levels of CD45 and CD68 staining compared to unmodified scaffolds. Furthermore, there was increased PPAR-γ staining demonstrated at 3-months with PRP-ADSC-POSS-PCL scaffolds (p < 0.05). POSS-PCL nanocomposite scaffolds provide an effective delivery system for ADSCs. PRP and ADSC work synergistically to enhance the biocompatibility of POSS-PCL scaffolds and provide a platform technology for soft tissue regeneration.
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Affiliation(s)
- N Naderi
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK.,Royal Free London NHS Foundation Trust Hospital, London, UK.,Plastic and Reconstructive Surgery Department, Royal Free Hospital, University College London, Pond Street, London, UK
| | - M F Griffin
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK. .,Royal Free London NHS Foundation Trust Hospital, London, UK. .,Plastic and Reconstructive Surgery Department, Royal Free Hospital, University College London, Pond Street, London, UK.
| | - A Mosahebi
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK.,Royal Free London NHS Foundation Trust Hospital, London, UK.,Plastic and Reconstructive Surgery Department, Royal Free Hospital, University College London, Pond Street, London, UK
| | - P E Butler
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK.,Royal Free London NHS Foundation Trust Hospital, London, UK.,Plastic and Reconstructive Surgery Department, Royal Free Hospital, University College London, Pond Street, London, UK
| | - A M Seifalian
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, UK.,Director/Professor Nanotechnology & Regenerative Medicine, NanoRegMed Ltd, London, UK
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18
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Nilforoushzadeh MA, Amirkhani MA, Hamidieh AA, Seifalian AM, Sisakht MM. Skin regenerative medicine advancements in the Islamic Republic of Iran: a concise review. Regen Med 2019; 14:1047-1056. [PMID: 31718464 DOI: 10.2217/rme-2018-0170] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 01/06/2023] Open
Abstract
In the last decade, the Islamic Republic of Iran has witnessed significant improvement and growth in the field of interdisciplinary medicine and in its translation to patients, including the field of cell and stem cell therapy. The main aim of this report is to highlight various advances in regenerative medicine for skin and dermatology using stem cell technology, and its translation to clinic in the past two decades, in Iranian academic centers, clinical institutes and hospitals. While there have been numerous positive advances in clinical outcomes reported in Iran, there is no comparative analytical information on these studies. Here we present a historical overview of the progress and key advancements seen in skin regeneration in this country, review the research frameworks, regulatory approach and pathways and offer perspectives for the future.
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Affiliation(s)
| | - Mohammad Amir Amirkhani
- Skin and Stem Cell Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Stem Cell and Regenerative Medicine Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Ali Hamidieh
- Stem Cell and Regenerative Medicine Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran.,Pediatric Stem Cell Transplant Department, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (Ltd), The London Bioscience Innovation Centre, London, UK
| | - Mahsa Mollapour Sisakht
- Skin and Stem Cell Research Center, Tehran University of Medical Sciences, Tehran, Iran.,Stem Cell and Regenerative Medicine Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
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19
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Nezakati T, Tan A, Lim J, Cormia RD, Teoh SH, Seifalian AM. Ultra-low percolation threshold POSS-PCL/graphene electrically conductive polymer: Neural tissue engineering nanocomposites for neurosurgery. Materials Science and Engineering: C 2019; 104:109915. [DOI: 10.1016/j.msec.2019.109915] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 05/31/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
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20
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Najminejad H, Kalantar SM, Abdollahpour‐Alitappeh M, Karimi MH, Seifalian AM, Gholipourmalekabadi M, Sheikhha MH. Emerging roles of exosomal miRNAs in breast cancer drug resistance. IUBMB Life 2019; 71:1672-1684. [DOI: 10.1002/iub.2116] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 06/19/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Hamid Najminejad
- Department of Medical GeneticsShahid Sadoughi University of Medical Sciences Yazd Iran
| | - Seyed Mehdi Kalantar
- Research and Clinical Center for InfertilityShahid Sadoughi University of Medical Sciences Yazd Iran
| | | | | | - Alexander M. Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre (Ltd)The London BioScience Innovation Centre London UK
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research CentreIran University of Medical Sciences Tehran Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in MedicineIran University of Medical Sciences Tehran Iran
| | - Mohammad Hasan Sheikhha
- Research and Clinical Center for InfertilityShahid Sadoughi University of Medical Sciences Yazd Iran
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21
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Griffin MF, Naderi N, Kalaskar DM, Seifalian AM, Butler PE. Argon plasma surface modification promotes the therapeutic angiogenesis and tissue formation of tissue-engineered scaffolds in vivo by adipose-derived stem cells. Stem Cell Res Ther 2019; 10:110. [PMID: 30922398 PMCID: PMC6440049 DOI: 10.1186/s13287-019-1195-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/21/2019] [Accepted: 02/25/2019] [Indexed: 01/09/2023] Open
Abstract
Background Synthetic implants are being used to restore injured or damaged tissues following cancer resection and congenital diseases. However, the survival of large tissue implant replacements depends on their ability to support angiogenesis that if limited, causes extrusion and infection of the implant. This study assessed the beneficial effect of platelet-rich plasma (PRP) and adipose-derived stem cells (ADSCs) on synthetic biomaterials in combination with argon plasma surface modification to enhance vascularisation of tissue-engineered constructs. Methods Non-biodegradable polyurethane scaffolds were manufactured and modified with plasma surface modification using argon gas (PM). Donor rats were then used to extract ADSCs and PRP to modify the scaffolds further. Scaffolds with and without PM were modified with and without ADSCs and PRP and subcutaneously implanted in the dorsum of rats for 3 months. After 12 weeks, the scaffolds were excised and the degree of tissue integration using H&E staining and Masson’s trichrome staining, angiogenesis by CD31 and immune response by CD45 and CD68 immunohistochemistry staining was examined. Results H&E and Masson’s trichrome staining showed PM+PRP+ADSC and PM+ADSC scaffolds had the greatest tissue integration, but there was no significant difference between the two scaffolds (p < 0.05). The greatest vessel formation after 3 months was shown with PM+PRP+ADSC and PM+ADSC scaffolds using CD31 staining compared to all other scaffolds (p < 0.05). The CD45 and CD68 staining was similar between all scaffolds after 3 months showing the ADSCs or PRP had no effect on the immune response of the scaffolds. Conclusions Argon plasma surface modification enhanced the effect of adipose-derived stem cells effect on angiogenesis and tissue integration of polyurethane scaffolds. The combination of ADSCs and argon plasma modification may improve the survival of large tissue implants for regenerative applications. Electronic supplementary material The online version of this article (10.1186/s13287-019-1195-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- M F Griffin
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK. .,Royal Free London NHS Foundation Trust Hospital, London, UK. .,Charles Wolfson Center for Reconstructive Surgery, Royal Free Hospital, London, UK. .,Plastic and Reconstructive Surgery Department, Royal Free Hospital, University College London, Pond Street, London, UK.
| | - N Naderi
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK.,Royal Free London NHS Foundation Trust Hospital, London, UK
| | - D M Kalaskar
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK.,UCL Institute of Orthopaedics and Musculoskeletal Science, Division of Surgery and Interventional Science, University College London, Stanmore, Middlesex, HA7 4LP, UK
| | - A M Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (Ltd), The London Bioscience Innovation Centre, London, NW1 0NH, UK
| | - P E Butler
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, UK.,Royal Free London NHS Foundation Trust Hospital, London, UK.,Charles Wolfson Center for Reconstructive Surgery, Royal Free Hospital, London, UK
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22
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Abstract
Introduction: In this research, low-level helium-neon (He-Ne) laser irradiation effects on monkey kidney cells (Vero cell line) mitosis were studied. Methods: The experiment was carried out on a monkey kidney cell line "Vero (CCL-81)". This is a lineage of cells used in cell cultures and can be used for efficacy and media testing. The monolayer cells were formed on coating glass in a spectral cuvette (20×20×30 mm). The samples divided into two groups. The first groups as irradiated monolayer cells were exposed by a He-Ne laser (PolyaronNPO, L'vov, Ukraine) with λ=632.8 nm, max power density (P) = 10 mW/cm2 , generating linearly polarized and the second groups as the control monolayer cells were located in a cuvette protected by a lightproof screen from the first cuvette and also from the laser exposure. Then, changing functional activity of the monolayer cells, due to the radiation influence on some physical factors were measured. Results: The results showed that low-intensity laser irradiation in the range of visible red could make meaningful changes in the cell division process (the mitosis activity). These changes depend on the power density, exposure time, the presence of a magnetic field, and the duration of time after exposure termination. The stimulatory effects on the cell division within the power density of 1-6 mW/(cm2 ) and exposure time in the range of 1-10 minutes was studied. It is demonstrated that the increase in these parameters (power density and exposure time) leads to destructing the cell division process. Conclusion: The results are useful to identify the molecular mechanisms caused by low-intensity laser effects on the biological activities of the cells. Thus, this study helps to optimize medical laser technology as well as achieving information on the therapeutic effects of low-intensity lasers.
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Affiliation(s)
- Monireh Ganjali
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Centre (Ltd), The London BioScience Innovation Centre, London, UK
| | - Masoud Mozafari
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, Iran
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23
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Amrollahi-Sharifabadi M, Koohi MK, Zayerzadeh E, Hablolvarid MH, Hassan J, Seifalian AM. In vivo toxicological evaluation of graphene oxide nanoplatelets for clinical application. Int J Nanomedicine 2018; 13:4757-4769. [PMID: 30174424 PMCID: PMC6110298 DOI: 10.2147/ijn.s168731] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Graphene is considered as a wonder material; it is the strongest material on the planet, super-elastic, and conductive. Its application in biomedicine is huge, with a multibillion-dollar industry, and will revolutionize the diagnostic and treatment of diseases. However, its safety and potential toxicity is the main challenge. Methods This study assessed the potential toxicity of graphene oxide nanoplatelets (GONs) in an in vivo animal model using systemic, hematological, biochemical, and histopathological examinations. Normal saline (control group) or GONs (3–6 layers, lateral dimension=5–10 μm, and thickness=0.8–2 nm) at dose rate of 50, 150, or 500 mg/kg were intraperitoneally injected into adult male Wistar rats (n=5) every 48 hours during 1 week to receive each animal a total of four doses. The animals were allowed 2 weeks to recover after the last dosing. Then, animals were killed and the blood was collected for hematological and biochemical analysis. The organs including the liver, kidney, spleen, lung, intestine, brain, and heart were harvested for histopathological evaluations. Results The results showed GONs prevented body weight gain in animals after 21 days, treated at 500 mg/kg, but not in the animals treated at 150 or 50 mg/kg GONs. The biochemical analysis showed a significant increase in total bilirubin, with a significant decrease in triglycerides and high-density lipoprotein in animals treated at 500 mg/kg. Nonetheless, other hematological and biochemical parameters remained statistically insignificant in all GONs treated animals. The most common histopathological findings in the visceral organs were granulomatous reaction with giant cell formation and accumulation of GONs in capsular regions. Also, small foci of neuronal degeneration and necrosis were the most outstanding findings in the brain, including the cerebellum. Conclusion In conclusion, this study shows that GONs without functionalization are toxic. The future study is a comparison of the functionalized with non-functionalized GONs.
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Affiliation(s)
| | - Mohammad Kazem Koohi
- Department of Basic Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran,
| | - Ehsan Zayerzadeh
- Department of Biology, Faculty of Food Industry and Agriculture, Standard Research Institute, Karaj, Iran
| | - Mohammad Hassan Hablolvarid
- Department of Pathology, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Jalal Hassan
- Department of Basic Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran,
| | - Alexander M Seifalian
- NanoRegMed ltd, Nanotechnology and Regenerative Medicine Commercialization Centre, The London Bioscience Innovation Centre, London, UK
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24
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Affiliation(s)
- Toktam Nezakati
- Google Inc.., Mountain View, California 94043, United States
- Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London NW3 2QG, United Kingdom
| | - Amelia Seifalian
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Aaron Tan
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Alexander M. Seifalian
- NanoRegMed Ltd. (Nanotechnology and Regenerative Medicine Commercialization Centre), The London Innovation BioScience Centre, London NW1 0NH, United Kingdom
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25
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Dalamagkas K, Tsintou M, Seifalian A, Seifalian AM. Translational Regenerative Therapies for Chronic Spinal Cord Injury. Int J Mol Sci 2018; 19:E1776. [PMID: 29914060 PMCID: PMC6032191 DOI: 10.3390/ijms19061776] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [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: 04/30/2018] [Revised: 06/05/2018] [Accepted: 06/06/2018] [Indexed: 12/22/2022] Open
Abstract
Spinal cord injury is a chronic and debilitating neurological condition that is currently being managed symptomatically with no real therapeutic strategies available. Even though there is no consensus on the best time to start interventions, the chronic phase is definitely the most stable target in order to determine whether a therapy can effectively restore neurological function. The advancements of nanoscience and stem cell technology, combined with the powerful, novel neuroimaging modalities that have arisen can now accelerate the path of promising novel therapeutic strategies from bench to bedside. Several types of stem cells have reached up to clinical trials phase II, including adult neural stem cells, human spinal cord stem cells, olfactory ensheathing cells, autologous Schwann cells, umbilical cord blood-derived mononuclear cells, adult mesenchymal cells, and autologous bone-marrow-derived stem cells. There also have been combinations of different molecular therapies; these have been either alone or combined with supportive scaffolds with nanostructures to facilitate favorable cell⁻material interactions. The results already show promise but it will take some coordinated actions in order to develop a proper step-by-step approach to solve impactful problems with neural repair.
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Affiliation(s)
- Kyriakos Dalamagkas
- The Institute for Rehabilitation and Research, Memorial Hermann Texas Medical Centre, Houston, TX 77030, USA.
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery and Interventional Science, University College of London (UCL), London NW3 2QG, UK.
| | - Magdalini Tsintou
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery and Interventional Science, University College of London (UCL), London NW3 2QG, UK.
- Center for Neural Systems Investigations, Massachusetts General Hospital/HST Athinoula A., Martinos Centre for Biomedical Imaging, Harvard Medical School, Boston, MA 02129, USA.
| | - Amelia Seifalian
- Faculty of Medical Sciences, UCL Medical School, London WC1E 6BT, UK.
| | - Alexander M Seifalian
- NanoRegMed Ltd. (Nanotechnology & Regenerative Medicine Commercialization Centre), The London BioScience Innovation Centre, London NW1 0NH, UK.
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26
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Wong JK, Seifalian A, Mohseni R, Hamidieh AA, MacLaren RE, Habib N, Seifalian AM. Emerging In Vitro 3D Tumour Models in Nanoparticle-Based Gene and Drug Therapy. Trends Biotechnol 2018; 36:477-480. [DOI: 10.1016/j.tibtech.2018.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 02/02/2018] [Indexed: 10/17/2022]
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27
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Gholipourmalekabadi M, Seifalian AM, Urbanska AM, Omrani MD, Hardy JG, Madjd Z, Hashemi SM, Ghanbarian H, Brouki Milan P, Mozafari M, Reis RL, Kundu SC, Samadikuchaksaraei A. 3D Protein-Based Bilayer Artificial Skin for the Guided Scarless Healing of Third-Degree Burn Wounds in Vivo. Biomacromolecules 2018. [PMID: 29529861 DOI: 10.1021/acs.biomac.7b01807] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Severe burn injuries can lead to delays in healing and devastating scar formation. Attempts have been made to develop a suitable skin substitute for the scarless healing of such skin wounds. Currently, there is no effective strategy for completely scarless healing after the thermal injuries. In our recent work, we fabricated and evaluated a 3D protein-based artificial skin made from decellularized human amniotic membrane (AM) and electrospun nanofibrous silk fibroin (ESF) in vitro. We also characterized both biophysical and cell culture investigation to establish in vitro performance of the developed bilayer scaffolds. In this report, we evaluate the appropriate utility of this fabricated bilayered artificial skin in vivo with particular emphasis on healing and scar formation due to the biochemical and biomechanical complexity of the skin. For this work, AM and AM/ESF membranes alone or seeded with adipose-tissue-derived mesenchymal stem cells (AT-MSCs) are implanted on full-thickness burn wounds in mice. The healing efficacy and scar formation are evaluated at 7, 14, and 28 days post-implantation in vivo. Our data reveal that ESF accelerates the wound-healing process through the early recruitment of inflammatory cells such as macrophages into the defective site as well as the up-regulation of angiogenic factors from the AT-MSCs and the facilitation of the remodeling phase. In vivo application of the prepared AM/ESF membrane seeded with the AT-MSCs reduces significantly the post-burn scars. The in vivo data suggest that the potential applications of the AM/ESF bilayered artificial skin may be considered a clinical translational product with stem cells to guide the scarless healing of severe burn injuries.
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Affiliation(s)
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialization Centre Ltd., The London BioScience Innovation Centre , London , NW1 0NH , United Kingdom
| | - Aleksandra M Urbanska
- Division of Digestive and Liver Diseases, Department of Medicine, Herbert Irving Comprehensive Cancer Center , Columbia University , New York , NY 10032 , United States
| | - Mir Davood Omrani
- Department of Medical Genetics, Faculty of Medicine , ○Cellular & Molecular Biology Research Centre , and ∥Department of Immunology, School of Medicine , and ◆Biotechnology Department, School of Advanced Technologies in Medicine , Shahid Beheshti University of Medical Sciences , Tehran , 19857-17443 Iran
| | | | | | | | | | | | - Masoud Mozafari
- Bioengineering Research Group, Department of Nanotechnology and Advanced Materials , Materials and Energy Research Center (MERC) , P.O. Box 31787-316 , Tehran , Iran
| | - Rui L Reis
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine , University of Minho , 4805-017 Barco, Guimaraes , Portugal
| | - Subhas C Kundu
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine , University of Minho , 4805-017 Barco, Guimaraes , Portugal
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28
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Gholipourmalekabadi M, Samadikuchaksaraei A, Seifalian AM, Urbanska AM, Ghanbarian H, Hardy JG, Omrani MD, Mozafari M, Reis RL, Kundu SC. Silk fibroin/amniotic membrane 3D bi-layered artificial skin. ACTA ACUST UNITED AC 2018; 13:035003. [PMID: 29125135 DOI: 10.1088/1748-605x/aa999b] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Burn injuries have been reported to be an important cause of morbidity and mortality and they are still considered as unmet clinical need. Although there is a myriad of effective stem cells that have been suggested for skin regeneration, there is no one ideal scaffold. The aim of this study was to develop a three-dimensional (3D) bi-layer scaffold made of biological decellularized human amniotic membrane (AM) with viscoelastic electrospun nanofibrous silk fibroin (ESF) spun on top. The fabricated 3D bi-layer AM/ESF scaffold was submerged in ethanol to induce β-sheet transformation as well as to get a tightly coated and inseparable bi-layer. The biomechanical and biological properties of the 3D bi-layer AM/ESF scaffold were investigated. The results indicate significantly improved mechanical properties of the AM/ESF compared with the AM alone. Both the AM and AM/ESF possess a variety of suitable adhesion cells without detectable cytotoxicity against adipose tissue-derived mesenchymal stem cells (AT-MSCs). The AT-MSCs show increased expression of two main pro-angiogenesis factors, vascular endothelial growth factor and basic fibroblast growth factor, when cultured on the AM/ESF for 7 days, when comparing with AM alone. The results suggest that the AM/ESF scaffold with autologous AT-MSCs has excellent cell adhesion and proliferation along with production of growth factors which serves as a possible application in a clinical setting for skin regeneration.
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Affiliation(s)
- Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran. Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran. Cellular & Molecular Biology Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
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29
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Abstract
Spinal cord injury (SCI) is a highly debilitating neurological disease, which still lacks effective treatment strategies, causing significant financial burden and distress to the affected families. Nevertheless, nanotechnology and regenerative medicine strategies holding promise for the development of novel therapies that would reach from bench to bedside to serve the SCI patients. There has already been significant progress in the field of cell-based therapies, with the clinical application for SCI, currently in phase II of the clinical trial. Stem cells (e.g., induced pluripotent stem cells, fetal stem cells, human embryonic stem cells, and olfactory ensheathing cells) are certainly not to be considered the panacea for neural repair but, especially when combined with rehabilitation or other combinatorial approaches using the help of nanotechnology, they seem to be the source of some of the most promising and clinical translatable cell-based therapies that could help solving impactful problems on neural repair.
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Affiliation(s)
- Kyriakos Dalamagkas
- Department of Tissue Engineering, Harvard Medical School, Boston, MA, USA; Nanotechnology & Regenerative Medicine Centre, Division of Surgery and Interventional Science, University College London, London, UK
| | - Magdalini Tsintou
- Department of Tissue Engineering, Harvard Medical School, Boston, MA, USA; Nanotechnology & Regenerative Medicine Centre, Division of Surgery and Interventional Science, University College London, London, UK
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialisation Centre (Ltd.), The London BioScience Innovation Centre, London, UK
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30
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Naderi N, Karponis D, Mosahebi A, Seifalian AM. Nanoparticles in wound healing; from hope to promise, from promise to routine. Front Biosci (Landmark Ed) 2018; 23:1038-1059. [PMID: 28930588 DOI: 10.2741/4632] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chronic non-healing wounds represent a growing problem due to their high morbidity and cost. Despite recent advances in wound healing, several systemic and local factors can disrupt the weighed physiologic healing process. This paper critically reviews and discusses the role of nanotechnology in promoting the wound healing process. Nanotechnology-based materials have physicochemical, optical and biological properties unique from their bulk equivalent. These nanoparticles can be incorporated into scaffolds to create nanocomposite smart materials, which promote wound healing through their antimicrobial, as well as selective anti- and pro-inflammatory, and pro-angiogenic properties. Owed to their high surface area, nanoparticles have also been used for drug delivery as well as gene delivery vectors. In addition, nanoparticles affect wound healing by influencing collagen deposition and realignment and provide approaches for skin regeneration and wound healing.
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Affiliation(s)
- Naghmeh Naderi
- Division of Surgery and Interventional Science, University College London, London, UK,and Reconstructive Surgery and Regenerative Medicine Group, Institute of Life Sciences (ILS), Swansea University Medical School, Swansea, UK
| | - Dimitrios Karponis
- School of Medicine, Imperial College London, London, UK, The Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Afshin Mosahebi
- Division of Surgery and Interventional Science, University College London, London, UK, and Department of Plastic Surgery, Royal Free NHS Foundation Trust, London, UK
| | - Alexander M Seifalian
- Nanotechnology & Regenerative Medicine Commercialisation Centre, The London BioScience Innovation Centre, London, UK,
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31
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Wong JKL, Mohseni R, Hamidieh AA, MacLaren RE, Habib N, Seifalian AM. Limitations in Clinical Translation of Nanoparticle-Based Gene Therapy. Trends Biotechnol 2017; 35:1124-1125. [PMID: 28822599 DOI: 10.1016/j.tibtech.2017.07.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 07/06/2017] [Accepted: 07/24/2017] [Indexed: 12/31/2022]
Abstract
Organic nanoparticle-based (ONP) gene therapy is a potential strategy to cure human cancer. However, there are still many practical barriers before the promising results from in vitro and preclinical studies can be translated to clinical success. We discuss the reasons behind the hesitant uptake by the clinic.
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Affiliation(s)
| | - Rashin Mohseni
- Hematology-Oncology and Stem Cell Transplantation Research Centre, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Ali Hamidieh
- Hematology-Oncology and Stem Cell Transplantation Research Centre, Tehran University of Medical Sciences, Tehran, Iran
| | - Robert E MacLaren
- Nuffield Laboratory of Ophthalmology, Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Nagy Habib
- Faculty of Medicine, Department of Surgery and Cancer, Imperial College London, London, UK
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Centre (Ltd), The London BioScience Innovation Centre, London, UK.
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32
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Hughes SJ, Yang W, Juszczak M, Jones GL, Powis SH, Seifalian AM, Press M. Effect of Inspired Oxygen on Portal and Hepatic Oxygenation: Effective Arterialization of Portal Blood by Hyperoxia. Cell Transplant 2017; 13:801-8. [PMID: 15690982 DOI: 10.3727/000000004783983413] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Because hypoxia may compromise the survival of intraportally transplanted pancreatic islets, we have measured portal blood flow and both portal and hepatic oxygenation in normal and diabetic rats breathing graded inspired oxygen concentrations. Portal blood flow and hepatic tissue oxygenation were measured using a transonic flowmeter and near infrared spectroscopy while gas analysis was carried out on portal venous blood samples. The effects of breathing 13%, 21%, 50%, or 100% oxygen were compared in animals with steptozotocin-induced diabetes and in controls. In diabetic rats breathing 21% oxygen, portal blood flow was significantly lower than in controls (7.2 ± 0.7 vs. 9.1 ± 0.8 ml/min, p < 0.05). In both groups, breathing 100% oxygen significantly increased portal flow (to 8.4 ± 1.0 and 12.2 ± 0.7 ml/min, respectively). This effect was not secondary to hepatic arterial vasoconstriction because it was not prevented by hepatic artery ligation. In controls, breathing 100% oxygen increased portal pO2 from 5.0 ± 0.9 to 14.4 ± 1.4 kPa (p < 0.05) and portal venous oxygen saturation (PSaO2) from 53.9 ± 12.1% to 92.9 ± 1.4% (p < 0.05), a value not significantly different from peripheral (arterial) saturation. Similarly, in diabetic animals pO2 rose from 5.6 ± 0.3 to 11.7 ± 0.4 kPa (p < 0.01) and SO2 from 55.5 ± 5.2% to 88.5 ± 0.6% (p < 0.05). Hepatic oxyhemoglobin rose and deoxyhemoglobin fell reciprocally as a function of the inspired oxygen concentration. Improved hepatic oxygenation observed in animals breathing oxygen-enriched gas mixtures results from an increase in splanchnic blood flow coupled with a marked increase in portal oxygen saturation. This effective arterialization of portal blood may have important consequences for the success of intraportal transplantation of pancreatic islets.
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Affiliation(s)
- Stephen J Hughes
- Department of Endocrinology, Royal Free Campus, Royal Free & University College Medical School, London, UK
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33
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Wong JK, Mohseni R, Hamidieh AA, MacLaren RE, Habib N, Seifalian AM. Will Nanotechnology Bring New Hope for Gene Delivery? Trends Biotechnol 2017; 35:434-451. [DOI: 10.1016/j.tibtech.2016.12.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/29/2016] [Accepted: 12/14/2016] [Indexed: 12/20/2022]
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Ghasemi Hamidabadi H, Rezvani Z, Nazm Bojnordi M, Shirinzadeh H, Seifalian AM, Joghataei MT, Razaghpour M, Alibakhshi A, Yazdanpanah A, Salimi M, Mozafari M, Urbanska AM, Reis RL, Kundu SC, Gholipourmalekabadi M. Chitosan-Intercalated Montmorillonite/Poly(vinyl alcohol) Nanofibers as a Platform to Guide Neuronlike Differentiation of Human Dental Pulp Stem Cells. ACS Appl Mater Interfaces 2017; 9:11392-11404. [PMID: 28117963 DOI: 10.1021/acsami.6b14283] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In this study, we present a novel chitosan-intercalated montmorillonite/poly(vinyl alcohol) (OMMT/PVA) nanofibrous mesh as a microenvironment for guiding differentiation of human dental pulp stem cells (hDPSCs) toward neuronlike cells. The OMMT was prepared through ion exchange reaction between the montmorillonite (MMT) and chitosan. The PVA solutions containing various concentrations of OMMT were electrospun to form 3D OMMT-PVA nanofibrous meshes. The biomechanical and biological characteristics of the nanofibrous meshes were evaluated by ATR-FTIR, XRD, SEM, MTT, and LDH specific activity, contact angle, and DAPI staining. They were carried out for mechanical properties, overall viability, and toxicity of the cells. The hDPSCs were seeded on the prepared scaffolds and induced with neuronal specific differentiation media at two differentiation stages (2 days at preinduction stage and 6 days at induction stage). The neural differentiation of the cells cultured on the meshes was evaluated by determining the expression of Oct-4, Nestin, NF-M, NF-H, MAP2, and βIII-tubulin in the cells after preinduction, at induction stages by real-time PCR (RT-PCR) and immunostaining. All the synthesized nanofibers exhibited a homogeneous morphology with a favorable mechanical behavior. The population of the cells differentiated into neuronlike cells in all the experimental groups was significantly higher than that in control group. The expression level of the neuronal specific markers in the cells cultured on 5% OMMT/PVA meshes was significantly higher than the other groups. This study demonstrates the feasibility of the OMMT/PVA artificial nerve graft cultured with hDPSCs for regeneration of damaged neural tissues. These fabricated matrices may have a potential in neural tissue engineering applications.
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Affiliation(s)
| | - Zahra Rezvani
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
| | | | - Haji Shirinzadeh
- Semiconductor Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation centre (Ltd) The London BioScience Innovation Centre , London, NW1 0NH, United Kingdom
| | - Mohammad Taghi Joghataei
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
| | - Mojgan Razaghpour
- Amirkabir University of Technology , Textile Department, No. 424, Tehran, Iran
| | | | - Abolfazl Yazdanpanah
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology , P.O. Box 15875-4413, Tehran, Iran
| | | | - Masoud Mozafari
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Aleksandra M Urbanska
- Division of Digestive and Liver Disease, Department of Medicine and Herbert Irving Comprehensive Cancer Center, Columbia University , New York, New York 10032, United States
| | - Rui L Reis
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho , AvePark 4805-017 Barco, Guimaraes, Portugal
| | - Subhas C Kundu
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho , AvePark 4805-017 Barco, Guimaraes, Portugal
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences , Tehran, Iran
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35
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Naderi N, Combellack EJ, Griffin M, Sedaghati T, Javed M, Findlay MW, Wallace CG, Mosahebi A, Butler PEM, Seifalian AM, Whitaker IS. The regenerative role of adipose-derived stem cells (ADSC) in plastic and reconstructive surgery. Int Wound J 2017; 14:112-124. [PMID: 26833722 PMCID: PMC7949873 DOI: 10.1111/iwj.12569] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [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: 08/04/2015] [Revised: 11/24/2015] [Accepted: 12/01/2015] [Indexed: 12/12/2022] Open
Abstract
The potential use of stem cell-based therapies for the repair and regeneration of various tissues and organs offers a paradigm shift in plastic and reconstructive surgery. The use of either embryonic stem cells (ESC) or induced pluripotent stem cells (iPSC) in clinical situations is limited because of regulations and ethical considerations even though these cells are theoretically highly beneficial. Adult mesenchymal stem cells appear to be an ideal stem cell population for practical regenerative medicine. Among these cells, adipose-derived stem cells (ADSC) have the potential to differentiate the mesenchymal, ectodermal and endodermal lineages and are easy to harvest. Additionally, adipose tissue yields a high number of ADSC per volume of tissue. Based on this background knowledge, the purpose of this review is to summarise and describe the proliferation and differentiation capacities of ADSC together with current preclinical data regarding the use of ADSC as regenerative tools in plastic and reconstructive surgery.
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Affiliation(s)
- Naghmeh Naderi
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS)Swansea University Medical SchoolSwanseaUK
- Welsh Centre for Burns & Plastic SurgeryABMU Health BoardSwanseaUK
| | - Emman J Combellack
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS)Swansea University Medical SchoolSwanseaUK
- Welsh Centre for Burns & Plastic SurgeryABMU Health BoardSwanseaUK
| | - Michelle Griffin
- UCL Centre for Nanotechnology and Regenerative MedicineUniversity College LondonLondonUK
| | - Tina Sedaghati
- UCL Centre for Nanotechnology and Regenerative MedicineUniversity College LondonLondonUK
| | - Muhammad Javed
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS)Swansea University Medical SchoolSwanseaUK
- Welsh Centre for Burns & Plastic SurgeryABMU Health BoardSwanseaUK
| | - Michael W Findlay
- Plastic & Reconstructive SurgeryStanford University Medical CentreStanfordCAUSA
| | | | - Afshin Mosahebi
- UCL Centre for Nanotechnology and Regenerative MedicineUniversity College LondonLondonUK
- Department of Plastic SurgeryRoyal Free NHS Foundation TrustLondonUK
| | - Peter EM Butler
- Department of Plastic SurgeryRoyal Free NHS Foundation TrustLondonUK
| | - Alexander M Seifalian
- UCL Centre for Nanotechnology and Regenerative MedicineUniversity College LondonLondonUK
| | - Iain S Whitaker
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS)Swansea University Medical SchoolSwanseaUK
- Welsh Centre for Burns & Plastic SurgeryABMU Health BoardSwanseaUK
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Griffin MF, Palgrave RG, Seifalian AM, Butler PE, Kalaskar DM. Enhancing tissue integration and angiogenesis of a novel nanocomposite polymer using plasma surface polymerisation, an in vitro and in vivo study. Biomater Sci 2017; 4:145-58. [PMID: 26474453 DOI: 10.1039/c5bm00265f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Current surgical reconstruction of facial defects including nose or ear involves harvesting patient's own autologous tissue, causing donor site morbidity and is limited by tissue availability. The use of alternative synthetic materials is also limited due to complications related to poor tissue integration and angiogenesis, which lead to extrusion of implants and infection. We intend to meet this clinical challenge by using a novel nanocomposite called polyhedral oligomeric silsesquioxane poly(carbonate-urea)urethane (POSS-PCU), which has already been successfully taken to the clinical bench-side as a replacement for trachea, tear duct and vascular by-pass graft. In this study, we aimed to enhance tissue integration and angiogenesis of POSS-PCU using an established surface treatment technique, plasma surface polymerisation (PSP), functionalising the surface using NH2 and COOH chemical groups. Physical characterisation of scaffolds was achieved by using a number of techniques, including water contact angle, SEM, AFM and XPS to study the effects of PSM modification on the POSS-PCU nanocomposite in detail, which has not been previously documented. Wettability evaluation confirmed that scaffolds become hydrophilic and AFM analysis confirmed that nano topographical alterations resulted as a consequence of PSP treatment. Chemical functionalisation was confirmed using XPS, which suggested the presence of NH2 and COOH functional groups on the scaffolds. The modified scaffolds were then tested both in vitro and in vivo to investigate the potential of PSP modified POSS-PCU scaffolds on tissue integration and angiogenesis. In vitro analysis confirmed that PSM modification resulted in higher cellular growth, proliferation and ECM production as assessed by biochemical assays and immunofluorescence. Subcutaneous implantation of modified POSS-PCU scaffolds was then carried out over 12-weeks, resulting in enhanced tissue integration and angiogenesis (p < 0.05). This study demonstrates a simple and cost effective surface modification method to overcome the current challenge of implant extrusion and infection caused by poor integration and angiogenesis.
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Affiliation(s)
- Michelle F Griffin
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK.
| | - Robert G Palgrave
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Alexander M Seifalian
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK.
| | - Peter E Butler
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK. and Department of Plastic and Reconstructive Surgery, Royal Free London NHS Foundation Trust Hospital, London, UK
| | - Deepak M Kalaskar
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK.
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Salmasi S, Nayyer L, Seifalian AM, Blunn GW. Nanohydroxyapatite Effect on the Degradation, Osteoconduction and Mechanical Properties of Polymeric Bone Tissue Engineered Scaffolds. Open Orthop J 2016; 10:900-919. [PMID: 28217213 PMCID: PMC5299581 DOI: 10.2174/1874325001610010900] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/12/2016] [Accepted: 05/31/2016] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Statistical reports show that every year around the world approximately 15 million bone fractures occur; of which up to 10% fail to heal completely and hence lead to complications of non-union healing. In the past, autografts or allografts were used as the “gold standard” of treating such defects. However, due to various limitations and risks associated with these sources of bone grafts, other avenues have been extensively investigated through which bone tissue engineering; in particular engineering of synthetic bone graft substitutes, has been recognised as a promising alternative to the traditional methods. METHODS A selective literature search was performed. RESULTS Bone tissue engineering offers unlimited supply, eliminated risk of disease transmission and relatively low cost. It could also lead to patient specific design and manufacture of implants, prosthesis and bone related devices. A potentially promising building block for a suitable scaffold is synthetic nanohydroxyapatite incorporated into synthetic polymers. Incorporation of nanohydroxyapatite into synthetic polymers has shown promising bioactivity, osteoconductivity, mechanical properties and degradation profile compared to other techniques previously considered. CONCLUSION Scientific research, through extensive physiochemical characterisation, in vitro and in vivo assessment has brought together the optimum characteristics of nanohydroxyapatite and various types of synthetic polymers in order to develop nanocomposites of suitable nature for bone tissue engineering. The aim of the present article is to review and update various aspects involved in incorporation of synthetic nanohydroxyapatite into synthetic polymers, in terms of their potentials to promote bone growth and regeneration in vitro, in vivo and consequently in clinical applications.
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Affiliation(s)
- Shima Salmasi
- UCL Division of Surgery and Interventional Science, Centre for Nanotechnology and Regenerative Medicine, University College London, London NW3 2PF, United Kingdom
| | - Leila Nayyer
- UCL Division of Surgery and Interventional Science, Centre for Nanotechnology and Regenerative Medicine, University College London, London NW3 2PF, United Kingdom
| | - Alexander M Seifalian
- UCL Division of Surgery and Interventional Science, Centre for Nanotechnology and Regenerative Medicine, University College London, London NW3 2PF, United Kingdom
| | - Gordon W Blunn
- John Scales Centre for Biomedical Engineering, Institute of Orthopaedics and Musculoskeletal Science, Division of Surgery and Interventional Science, University College London, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, United Kingdom
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Rahmani B, Tzamtzis S, Sheridan R, Mullen MJ, Yap J, Seifalian AM, Burriesci G. In Vitro Hydrodynamic Assessment of a New Transcatheter Heart Valve Concept (the TRISKELE). J Cardiovasc Transl Res 2016; 10:104-115. [PMID: 28028692 PMCID: PMC5437138 DOI: 10.1007/s12265-016-9722-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 11/21/2016] [Indexed: 11/01/2022]
Abstract
This study presents the in vitro hydrodynamic assessment of the TRISKELE, a new system suitable for transcatheter aortic valve implantation (TAVI), aiming to mitigate the procedural challenges experienced with current technologies. The TRISKELE valve comprises three polymeric leaflet and an adaptive sealing cuff, supported by a novel fully retrievable self-expanding nitinol wire frame. Valve prototypes were manufactured in three sizes of 23, 26, and 29 mm by automated dip-coating of a biostable polymer, and tested in a hydrodynamic bench setup in mock aortic roots of 21, 23, 25, and 27 mm annulus, and compared to two reference valves suitable for equivalent implantation ranges: Edwards SAPIEN XT and Medtronic CoreValve. The TRISKELE valves demonstrated a global hydrodynamic performance comparable or superior to the controls with significant reduction in paravalvular leakage. The TRISKELE valve exhibits enhanced anchoring and improved sealing. The valve is currently under preclinical investigation.
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Affiliation(s)
- Benyamin Rahmani
- Cardiovascular Engineering Laboratory, UCL Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Spyros Tzamtzis
- Cardiovascular Engineering Laboratory, UCL Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Rose Sheridan
- Cardiovascular Engineering Laboratory, UCL Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK
| | - Michael J Mullen
- Barts Health NHS Trust, University College London Hospital, London, UK
| | - John Yap
- Barts Health NHS Trust, University College London Hospital, London, UK
| | | | - Gaetano Burriesci
- Cardiovascular Engineering Laboratory, UCL Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK. .,Ri.MED Foundation, Bioengineering Group, Palermo, Italy.
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Gholipourmalekabadi M, Zhao S, Harrison BS, Mozafari M, Seifalian AM. Oxygen-Generating Biomaterials: A New, Viable Paradigm for Tissue Engineering? Trends Biotechnol 2016; 34:1010-1021. [DOI: 10.1016/j.tibtech.2016.05.012] [Citation(s) in RCA: 147] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 05/11/2016] [Accepted: 05/19/2016] [Indexed: 01/10/2023]
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Antonova LV, Seifalian AM, Kutikhin AG, Sevostyanova VV, Matveeva VG, Velikanova EA, Mironov AV, Shabaev AR, Glushkova TV, Senokosova EA, Vasyukov GY, Krivkina EO, Burago AY, Kudryavtseva YA, Barbarash OL, Barbarash LS. Conjugation with RGD Peptides and Incorporation of Vascular Endothelial Growth Factor Are Equally Efficient for Biofunctionalization of Tissue-Engineered Vascular Grafts. Int J Mol Sci 2016; 17:E1920. [PMID: 27854352 PMCID: PMC5133917 DOI: 10.3390/ijms17111920] [Citation(s) in RCA: 24] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 10/21/2016] [Accepted: 10/31/2016] [Indexed: 01/13/2023] Open
Abstract
The blend of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(ε-caprolactone) (PCL) has recently been considered promising for vascular tissue engineering. However, it was shown that PHBV/PCL grafts require biofunctionalization to achieve high primary patency rate. Here we compared immobilization of arginine-glycine-aspartic acid (RGD)-containing peptides and the incorporation of vascular endothelial growth factor (VEGF) as two widely established biofunctionalization approaches. Electrospun PHBV/PCL small-diameter grafts with either RGD peptides or VEGF, as well as unmodified grafts were implanted into rat abdominal aortas for 1, 3, 6, and 12 months following histological and immunofluorescence assessment. We detected CD31⁺/CD34⁺/vWF⁺ cells 1 and 3 months postimplantation at the luminal surface of PHBV/PCL/RGD and PHBV/PCL/VEGF, but not in unmodified grafts, with the further observation of CD31⁺CD34-vWF⁺ phenotype. These cells were considered as endothelial and produced a collagen-positive layer resembling a basement membrane. Detection of CD31⁺/CD34⁺ cells at the early stages with subsequent loss of CD34 indicated cell adhesion from the bloodstream. Therefore, either conjugation with RGD peptides or the incorporation of VEGF promoted the formation of a functional endothelial cell layer. Furthermore, both modifications increased primary patency rate three-fold. In conclusion, both of these biofunctionalization approaches can be considered as equally efficient for the modification of tissue-engineered vascular grafts.
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Affiliation(s)
- Larisa V Antonova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Alexander M Seifalian
- Centre for Nanotechnology and Regenerative Medicine, UCL Division of Surgery and Interventional Science, University College London, UCL Medical School Building, 21 University Street, London WC1E 6AU, UK.
- NanoRegMed Ltd., 20-22 Wenlock Road, London N1 7GU, UK.
| | - Anton G Kutikhin
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Victoria V Sevostyanova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Vera G Matveeva
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Elena A Velikanova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Andrey V Mironov
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Amin R Shabaev
- Kemerovo Cardiology Dispensary, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Tatiana V Glushkova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Evgeniya A Senokosova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Georgiy Yu Vasyukov
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Evgeniya O Krivkina
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Andrey Yu Burago
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Yuliya A Kudryavtseva
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Olga L Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Leonid S Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
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Kargozar S, Mozafari M, Hashemian SJ, Brouki Milan P, Hamzehlou S, Soleimani M, Joghataei MT, Gholipourmalekabadi M, Korourian A, Mousavizadeh K, Seifalian AM. Osteogenic potential of stem cells-seeded bioactive nanocomposite scaffolds: A comparative study between human mesenchymal stem cells derived from bone, umbilical cord Wharton's jelly, and adipose tissue. J Biomed Mater Res B Appl Biomater 2016; 106:61-72. [DOI: 10.1002/jbm.b.33814] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/07/2016] [Accepted: 10/27/2016] [Indexed: 02/02/2023]
Affiliation(s)
- Saeid Kargozar
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine; Tehran University of Medical Sciences; Tehran Iran
- National Cell Bank; Pasteur Institute of Iran; Tehran Iran
| | - Masoud Mozafari
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine; Iran University of Medical Sciences; Tehran Iran
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
| | - Seyed Jafar Hashemian
- Diabetes Research Center; Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences; Tehran Iran
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences; Tehran Iran
| | - Peiman Brouki Milan
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine; Iran University of Medical Sciences; Tehran Iran
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
| | - Sepideh Hamzehlou
- Department of Medical Genetics, School of Medicine; Tehran University of Medical Sciences; Tehran Iran
| | - Mansooreh Soleimani
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
- Department of Anatomy; Faculty of Medicine, Iran University of Medical Sciences; Tehran Iran
| | - Mohammad Taghi Joghataei
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
- Department of Anatomy; Faculty of Medicine, Iran University of Medical Sciences; Tehran Iran
| | - Mazaher Gholipourmalekabadi
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine; Iran University of Medical Sciences; Tehran Iran
- Cellular and Molecular Biology Research Centre; Shahid Beheshti University of Medical Science; Tehran Iran
| | - Alireza Korourian
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
| | - Kazem Mousavizadeh
- Cellular and Molecular Research Center (CMRC); Iran University of Medical Sciences; Tehran Iran
- Department of Molecular Medicine; Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences; Tehran Iran
| | - Alexander M. Seifalian
- Division of Surgery and Interventional Science; UCL Centre for Nanotechnology and Regenerative Medicine, University College London; London UK
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New SEP, Ibrahim A, Guasti L, Zucchelli E, Birchall M, Bulstrode NW, Seifalian AM, Ferretti P. Towards reconstruction of epithelialized cartilages from autologous adipose tissue-derived stem cells. J Tissue Eng Regen Med 2016; 11:3078-3089. [PMID: 27804241 DOI: 10.1002/term.2211] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 10/30/2015] [Revised: 04/01/2016] [Accepted: 04/14/2016] [Indexed: 12/27/2022]
Abstract
Deformities of the upper airways, including those of the nose and throat, are typically corrected by reconstructive surgery. The use of autologous somatic stem cells for repair of defects could improve quality and outcomes of such operations. The present study explored the ability of paediatric adipose-derived stem cells (pADSCs), a readily available source of autologous stem cells, to generate a cartilage construct with a functional epithelium. Paediatric ADSCs seeded on the biodegradable nanocomposite polymer, polyhedral oligomeric silsesquioxane poly(ϵ-caprolactone-urea) urethane (POSS-PCL), proliferated and differentiated towards mesenchymal lineages. The ADSCs infiltrated three-dimensional POSS-PCL nanoscaffold and chondroid matrix was observed throughout chondrogenically induced samples. In ovo chorioallantoic membrane-grafted ADSC-nanoscaffold composites were enwrapped by host vessels indicating good compatibility in an in vivo system. Furthermore, pADSCs could be induced to transdifferentiate towards barrier-forming epithelial-like cells. By combining differentiation protocols, it was possible to generate epithelial cell lined chondrogenic micromasses from the same pADSC line. This proof-of-concept study appears to be the first to demonstrate that individual pADSC lines can differentiate towards two different germ lines and be successfully co-cultured. This has important implications for bioengineering of paediatric airways and further confirms the plastic nature of ADSCs. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Sophie E P New
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London (UCL), London, UK
| | - Amel Ibrahim
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London (UCL), London, UK.,UCL Ear Institute, Royal National Throat, Nose and Ear Hospital, UCL, London, UK
| | - Leonardo Guasti
- Centre for Endocrinology, William Harvey Research Institute, Barts and the London, Queen Mary University of London, London, UK
| | - Eleonora Zucchelli
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London (UCL), London, UK
| | - Martin Birchall
- UCL Ear Institute, Royal National Throat, Nose and Ear Hospital, UCL, London, UK
| | - Neil W Bulstrode
- Department of Plastic Surgery, Great Ormond Street Hospital NHS Trust, London, UK
| | - Alexander M Seifalian
- Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, UCL, London, UK
| | - Patrizia Ferretti
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London (UCL), London, UK
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Tapuria N, Junnarkar S, Abu-amara M, Fuller B, Seifalian AM, Davidson BR. Haemoxygenase modulates cytokine induced neutrophil chemoattractant in hepatic ischemia reperfusion injury. World J Gastroenterol 2016; 22:7518-7535. [PMID: 27672274 PMCID: PMC5011667 DOI: 10.3748/wjg.v22.i33.7518] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 02/05/2016] [Accepted: 05/23/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the hepatic microcirculatory changes due to Haemoxygenase (HO), effect of HO inhibition on remote ischemic preconditioning (RIPC) and modulation of CINC.
METHODS Eight groups of animals were studied - Sham, ischemia reperfusion injury (IRI) the animals were subjected to 45 min of hepatic ischemia followed by three hours of reperfusion, RIPC (remote ischemic preconditioning) + IRI group, remote ischemic preconditioning in sham (RIPC + Sham), PDTC + IR (Pyridodithiocarbamate, HO donor), ZnPP + RIPC + IRI (Zinc protoporphyrin prior to preconditioning), IR-24 (45 min of ischemia followed by 24 h of reperfusion), RIPC + IR-24 (preconditioning prior to IR). After 3 and 24 h of reperfusion the animals were killed by exsanguination and samples were taken.
RESULTS Velocity of flow (160.83 ± 12.24 μm/s), sinusoidal flow (8.42 ± 1.19) and sinusoidal perfusion index (42.12 ± 7.28) in hepatic IR were lower (P < 0.05) in comparison to RIPC and PDTC (HO inducer). RIPC increased velocity of flow (328.04 ± 19.13 μm/s), sinusoidal flow (17.75 ± 2.59) and the sinusoidal perfusion index (67.28 ± 1.82) (P < 0.05). PDTC (HO induction) reproduced the effects of RIPC in hepatic IR. PDTC restored RBC velocity (300.88 ± 22.109 μm/s), sinusoidal flow (17.66 ± 3.71) and sinusoidal perfusion (82.33 ± 3.5) to near sham levels. ZnPP (HO inhibition) reduced velocity of flow of RBC in the RIPC group (170.74 ± 13.43 μm/s and sinusoidal flow in the RIPC group (9.46 ± 1.34). ZnPP in RIPC (60.29 ± 1.82) showed a fall in perfusion only at 180 min of reperfusion. Neutrophil adhesion in IR injury is seen in both postsinusoidal venules (769.05 ± 87.48) and sinusoids (97.4 ± 7.49). Neutrophil adhesion in RIPC + IR injury is reduced in both postsinusoidal venules (219.66 ± 93.79) and sinusoids (25.69 ± 9.08) (P < 0.05). PDTC reduced neutrophil adhesion in both postsinusoidal venules (89.58 ± 58.32) and sinusoids (17.98 ± 11.01) (P < 0.05) reproducing the effects of RIPC. ZnPP (HO inhibition) increased venular (589.04 ± 144.36) and sinusoidal neutrophil adhesion in preconditioned animals (121.39 ± 30.65) (P < 0.05). IR after 24 h of reperfusion increased venular and sinusoidal neutrophil adhesion in comparison to the early phase and was significantly reduced by RIPC. Hepatocellular cell death in IRI (80.83 ± 13.03), RIPC + IR (17.35 ± 2.47), and PTDC + IR (11.66 ± 1.17) reduced hepatocellular death. ZnPP + RIPC + IR (41.33 ± 3.07) significantly increased hepatocellular death (P < 0.05 PTDC/RIPC vs ZnPP and IR). The CINC cytokine levels in sham (101.32 ± 6.42). RIPC + sham (412.18 ± 65.24) as compared to sham (P < 0.05). CINC levels in hepatic IR were (644.08 ± 181.24). PDTC and RIPC CINC levels were significantly lower than hepatic IR (P < 0.05). HO inhibition in preconditioned animals with Zinc protoporphyrin increased serum CINC levels (521.81 ± 74.9) (P < 0.05). The serum CINC levels were high in the late phase of hepatic IR (15306 ± 1222.04). RIPC reduced CINC levels in the late phase of IR (467.46 ± 26.06), P < 0.05.
CONCLUSION RIPC protects hepatic microcirculation by induction of HO and modulation of CINC in hepatic IR.
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Rahmani B, Tzamtzis S, Sheridan R, Mullen MJ, Yap J, Seifalian AM, Burriesci G. A new transcatheter heart valve concept (the TRISKELE): feasibility in an acute preclinical model. EUROINTERVENTION 2016; 12:901-8. [DOI: 10.4244/eijv12i7a148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Griffin M, Nayyer L, Butler PE, Palgrave RG, Seifalian AM, Kalaskar DM. Development of mechano-responsive polymeric scaffolds using functionalized silica nano-fillers for the control of cellular functions. Nanomedicine 2016; 12:1725-33. [PMID: 27013128 PMCID: PMC4949378 DOI: 10.1016/j.nano.2016.02.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 01/25/2016] [Accepted: 02/10/2016] [Indexed: 12/31/2022]
Abstract
We demonstrate an efficient method to produce mechano-responsive polymeric scaffolds which can alter cellular functions using two different functionalized (OH and NH2) silica nano-fillers. Fumed silica-hydroxyl and fumed silica-amine nano-fillers were mixed with a biocompatible polymer (POSS-PCU) at various wt% to produce scaffolds. XPS and mechanical testing demonstrate that bulk mechanical properties are modified without changing the scaffold's surface chemistry. Mechanical testing showed significant change in bulk properties of POSS-PCU scaffolds with an addition of silica nanofillers as low as 1% (P<0.01). Scaffolds modified with NH2 silica showed significantly higher bulk mechanical properties compared to the one modified with the OH group. Enhanced cell adhesion, proliferation and collagen production over 14days were observed on scaffolds with higher bulk mechanical properties (NH2) compared to those with lower ones (unmodified and OH modified) (P<0.05) during in vitro analysis. This study provides an effective method of manufacturing mechano-responsive polymeric scaffolds, which can help to customize cellular responses for biomaterial applications.
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Affiliation(s)
- Michelle Griffin
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - Leila Nayyer
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - Peter E Butler
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, United Kingdom; Royal Free London NHS Foundation Trust Hospital, London, United Kingdom
| | - Robert G Palgrave
- Department of Chemistry, University College London, London, United Kingdom
| | - Alexander M Seifalian
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - Deepak M Kalaskar
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery & Interventional Science, University College London, London, United Kingdom.
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Abstract
In this paper, we uncover a new method for the preparation of biopolymer scaffolds and demonstrate its potential for the development of organs with the aid of tissue engineering. Two novel nanocomposite polymers, a nonbiodegradable polyhedral oligomeric silsesquioxane-poly (carbonate-urea)urethane and a biodegradable polyhedral oligomeric silsesquioxane-polycaprolactone-poly(carbonate-urea)urethane, have been subjected to flow in an electric field. Electrically forced microthreading of the polymers occurs and a three-dimensional print-patterning device was used to deposit fine (<50 µm) threads of polymer according to a predesigned architecture to prepare scaffolds. The technique can offer tremendous potential in the development of organs.
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Affiliation(s)
- Ashish Gupta
- Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus, London NW3 2PF, UK
| | - Alexander M. Seifalian
- Biomaterials and Tissue Engineering Centre, Academic Division of Surgery and Interventional Sciences, University College London, Hampstead Campus, London NW3 2PF, UK
| | - Zeeshan Ahmad
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Mohan J. Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK,
| | - Marc C. Winslet
- Royal Free Hampstead NHS Trust Hospital, Pond Street, London NW3 2QG, UK
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Youssef F, Gupta P, Seifalian AM, Myint F, Mikhailidis DP, Hamilton G. The Effect of Short-Term Treatment with Simvastatin on Renal Function in Patients with Peripheral Arterial Disease. Angiology 2016; 55:53-62. [PMID: 14759090 DOI: 10.1177/000331970405500108] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The objective of this study was to investigate the effects of lipid-lowering treatment on renal function in patients with peripheral arterial disease (PAD). This was a retrospective study of hyperlipidemic claudicants referred to a vascular surgery and risk modification clinic. Serum creatinine and urate concentrations and the fasting lipid profile were measured pretreatment and after 3-4 months of treatment with 20 mg/day simvastatin. In 103 consecutive patients with PAD (57 men; 46 women), median age 67 years (range: 51 to 83) there was a significant decrease in serum creatinine from a mean (SD) of 87 (12) μmol/L pretreatment to 84 (12) μmol/L post-treatment (p<0.0001). This difference was more marked in the tertile of patients with the highest baseline creatinine levels. There was also a significant reduction in serum urate from 0.37 (0.07) mmol/L to 0.35 (0.07) mmol/L (p<0.0001). Both these effects were independent of the degree of total cholesterol (TC) or low-density lipoprotein (LDL) cholesterol reduction. There was a significant reduction in TC from 6.6 (1.0) to 5.2 (0.8) mmol/L and LDL cholesterol from 4.3 (1.0) to 2.8 (0.7) mmol/L; both p<0.0001. Significant improvement also occurred in the high-density lipoprotein cholesterol and triglyceride levels. Cholesterol lowering with simvas tatin 20 mg/day improved indices of renal function after 3-4 months of treatment in hyper lipidemic patients with PAD. Further studies are needed to establish and define the clinical relevance of these findings, especially in patients with different degrees of renal failure.
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Affiliation(s)
- Fahed Youssef
- University Department of Surgery, Royal Free Hospital NHS Trust and Royal Free and University College Medical School, London, United Kingdom
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Agu O, Baker D, Seifalian AM. Effect of Graduated Compression Stockings on Limb Oxygenation and Venous Function during Exercise in Patients with Venous Insufficiency. Vascular 2016; 12:69-76. [PMID: 15127858 DOI: 10.1258/rsmvasc.12.1.69] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Despite the established role of compression as the basis for nonoperative treatment of chronic venous insufficiency (CVI), its mechanism of action remains unclear. Near-infrared spectroscopy (NIRS) provides continuous noninvasive monitoring of changes in tissue oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb). We applied NIRS to evaluate the effect of graded stockings on venous function and calf muscle oxygenation during exercise in patients with CVI. Ten patients (age 56 ± 5 years) with CVI were rested in supine posture for 20 minutes. NIRS optodes were attached to the calf. Venous function was assessed in each patient with and without graded compression stockings (classes I to III) at rest in the supine position, standing, with 10 tiptoe exercises, and on standard walking at 1.6 km/h for 5 minutes. Venous function was assessed by measuring changes in Hb and total hemoglobin (HbT) during the test, and muscle oxygenation was assessed by the oxygenation index (HbD), which is the difference between HbO2 and Hb. Standing without stockings caused a significant increase in Hb concentration by 10.75 ± 2.24 µmol/L compared with the supine position ( p < .001). This value was reduced when stockings were applied to 6.38 ± 2.75 µmol/L with class III stockings ( p = .005). During tiptoe exercise, the residual Hb concentration value without stockings was 7.62 ± 2.12 µmol/L compared with 5.88 ± 2.87, 3.77 ± 3.37, and 3.46 ± 2.73 ±mol/L for class I, II, and III stockings, respectively. The reduction in Hb concentration reached significance with class II and III stockings compared to without stockings ( p = .04). The HbT concentration was also reduced during tiptoe exercise, with increasing compression from 15.46 ± 5.31 µmol/L without compression to 11.52 ± 4.26 µmol/L with class III stockings ( p = .048). During walking, the Hb concentration was 11.40 ± 3.10 µmol/L without stockings, decreasing significantly ( p < .001) and progressively to 8.49 ± 3.24, 7.71 ± 3.51, and 6.89 ± 3.16 µmol/L with class I, II, and III stockings, respectively. Limb oxygenation (as measured by HbO2 concentration) during walking exercise, however, increased with higher-compression stockings and reached significance with class III stockings only ( p = .03). In patients with venous insufficiency, graduated compression stockings may achieve their beneficial effects by reducing venous pooling and improving deeper tissue oxygenation.
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Affiliation(s)
- Obi Agu
- Cardiovascular Haemodynamic Unit, University Department of Surgery, Royal Free and University College Medical School, University College London and The Royal Free Hospital, London, UK
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Askari F, Solouk A, Shafieian M, Seifalian AM. Stem cells for tissue engineered vascular bypass grafts. Artificial Cells, Nanomedicine, and Biotechnology 2016; 45:999-1010. [DOI: 10.1080/21691401.2016.1198366] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Forough Askari
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Atefeh Solouk
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Mehdi Shafieian
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Alexander M. Seifalian
- Centre for Nanotechnology and Regenerative Medicine, University College London, London, UK
- Royal Free Hampstead National Health Service Trust Hospital, London, UK
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50
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Adabi M, Naghibzadeh M, Adabi M, Zarrinfard MA, Esnaashari SS, Seifalian AM, Faridi-Majidi R, Tanimowo Aiyelabegan H, Ghanbari H. Biocompatibility and nanostructured materials: applications in nanomedicine. Artificial Cells, Nanomedicine, and Biotechnology 2016; 45:833-842. [DOI: 10.1080/21691401.2016.1178134] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mahdi Adabi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Majid Naghibzadeh
- Department of Nanotechnology, Research and Clinical Center for Infertility, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mohsen Adabi
- Department of Metallurgy and Materials Engineering, Faculty of Engineering, Roudehen Branch, Islamic Azad University, Roudehen, Tehran, Iran
| | - Mohammad Ali Zarrinfard
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyedeh Sara Esnaashari
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Alexander M. Seifalian
- Centre for Nanotechnology and Regenerative Medicine, University College London, London, United Kingdom
| | - Reza Faridi-Majidi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hammed Tanimowo Aiyelabegan
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ghanbari
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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