1
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Das IJ, Bal T. pH factors in chronic wound and pH-responsive polysaccharide-based hydrogel dressings. Int J Biol Macromol 2024; 279:135118. [PMID: 39208902 DOI: 10.1016/j.ijbiomac.2024.135118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 08/16/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Chronic wounds present a significant healthcare challenge marked by complexities such as persistent bleeding, inhibited cell proliferation, dysregulated inflammation, vulnerability to infection, and compromised tissue remodeling. Conventional wound dressings often prove inadequate in addressing the intricate requirements of chronic wound healing, leading to slow healing and heightened susceptibility to infections in patients with prolonged medical conditions. Bacterial biofilms in chronic wounds pose an additional challenge due to drug resistance. Advanced wound dressings have emerged as promising tools in expediting the healing process. Among these, pH-responsive polysaccharide-based hydrogels exhibit immense prospect by adapting their functions to dynamic wound conditions. Despite their potential, the current literature lacks a thorough review of these wound dressings. This review bridges this gap by meticulously examining factors related to chronic wounds, current strategies for healing, and the mechanisms and potential applications of pH-responsive hydrogel wound dressings as an emerging therapeutic solution. Special focus is given to their remarkable antibacterial properties and significant self-healing abilities. It further explores the pH-monitoring functions of these dressings, elucidating the associated pH indicators. This synthesis of knowledge aims to guide future research and development in the field of pH-responsive wound dressings, providing valuable insights into their potential applications in wound care.
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Affiliation(s)
- Itishree Jogamaya Das
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, India
| | - Trishna Bal
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, India.
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2
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Iwaniec J, Niziołek K, Polanowski P, Słota D, Kosińska E, Sadlik J, Miernik K, Jampilek J, Sobczak-Kupiec A. Polyethylene Glycol/Pullulan-Based Carrier for Silymarin Delivery and Its Potential in Biomedical Applications. Int J Mol Sci 2024; 25:9972. [PMID: 39337459 PMCID: PMC11432400 DOI: 10.3390/ijms25189972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2024] [Revised: 09/11/2024] [Accepted: 09/14/2024] [Indexed: 09/30/2024] Open
Abstract
Restoring the structures and functions of tissues along with organs in human bodies is a topic gathering attention nowadays. These issues are widely discussed in the context of regenerative medicine. Excipients/delivery systems play a key role in this topic, guaranteeing a positive impact on the effectiveness of the drugs or therapeutic substances supplied. Advances in materials engineering, particularly in the development of hydrogel biomaterials, have influenced the idea of creating an innovative material that could serve as a carrier for active substances while ensuring biocompatibility and meeting all the stringent requirements imposed on medical materials. This work presents the preparation of a natural polymeric material based on pullulan modified with silymarin, which belongs to the group of flavonoids and derives from a plant called Silybum marianum. Under UV light, matrices with a previously prepared composition were crosslinked. Before proceeding to the next stage of the research, the purity of the composition of the matrices was checked using Fourier-transform infrared (FT-IR) spectroscopy. Incubation tests lasting 19 days were carried out using incubation fluids such as simulated body fluid (SBF), Ringer's solution, and artificial saliva. Changes in pH, electrolytic conductivity, and weight were observed and then used to determine the sorption capacity. During incubation, SBF proved to be the most stable fluid, with a pH level of 7.6-7.8. Sorption tests showed a high sorption capacity of samples incubated in both Ringer's solution and artificial saliva (approximately 350%) and SBF (approximately 300%). After incubation, the surface morphology was analyzed using an optical microscope for samples demonstrating the greatest changes over time. The active substance, silymarin, was released using a water bath, and then the antioxidant capacity was determined using the Folin-Ciocâlteu test. The tests carried out proved that the material produced is active and harmless, which was shown by the incubation analysis. The continuous release of the active ingredient increases the biological value of the biomaterial. The material requires further research, including a more detailed assessment of its balance; however, it demonstrates promising potential for further experiments.
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Affiliation(s)
- Julia Iwaniec
- Cracow University of Technology, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Karina Niziołek
- Cracow University of Technology, CUT Doctoral School, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Patryk Polanowski
- Cracow University of Technology, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Dagmara Słota
- Cracow University of Technology, CUT Doctoral School, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Edyta Kosińska
- Cracow University of Technology, CUT Doctoral School, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Julia Sadlik
- Cracow University of Technology, CUT Doctoral School, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Krzysztof Miernik
- Cracow University of Technology, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
| | - Josef Jampilek
- Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15 Bratislava, Slovakia
- Department of Chemical Biology, Faculty of Science, Palacky University Olomouc, Slechtitelu 27, 783 71 Olomouc, Czech Republic
| | - Agnieszka Sobczak-Kupiec
- Cracow University of Technology, Faculty of Materials Engineering and Physics, Department of Materials Science, 37 Jana Pawła II Av., 31-864 Krakow, Poland
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3
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Qu F, Li W, Xu J, Zhang R, Ke J, Ren X, Meng X, Qin L, Zhang J, Lu F, Zhou X, Luo X, Zhang Z, Wang M, Wu G, Pei D, Chen J, Cui G, Suo S, Peng G. Three-dimensional molecular architecture of mouse organogenesis. Nat Commun 2023; 14:4599. [PMID: 37524711 PMCID: PMC10390492 DOI: 10.1038/s41467-023-40155-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 07/16/2023] [Indexed: 08/02/2023] Open
Abstract
Mammalian embryos exhibit sophisticated cellular patterning that is intricately orchestrated at both molecular and cellular level. It has recently become apparent that cells within the animal body display significant heterogeneity, both in terms of their cellular properties and spatial distributions. However, current spatial transcriptomic profiling either lacks three-dimensional representation or is limited in its ability to capture the complexity of embryonic tissues and organs. Here, we present a spatial transcriptomic atlas of all major organs at embryonic day 13.5 in the mouse embryo, and provide a three-dimensional rendering of molecular regulation for embryonic patterning with stacked sections. By integrating the spatial atlas with corresponding single-cell transcriptomic data, we offer a detailed molecular annotation of the dynamic nature of organ development, spatial cellular interactions, embryonic axes, and divergence of cell fates that underlie mammalian development, which would pave the way for precise organ engineering and stem cell-based regenerative medicine.
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Affiliation(s)
- Fangfang Qu
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
- GMU-GIBH Joint School of Life Sciences, The Guangdong-Hong Kong-Macau Joint Laboratory for Cell Fate Regulation and Diseases, Guangzhou Medical University, 510005, Guangzhou, Guangdong, China
- Guangzhou Laboratory, 510005, Guangzhou, Guangdong, China
| | - Wenjia Li
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
- Guangzhou Laboratory, 510005, Guangzhou, Guangdong, China
- The First Affiliated Hospital of Guangzhou Medical University, State Key Laboratory of Respiratory Disease, 510005, Guangzhou, Guangdong, China
| | - Jian Xu
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Ruifang Zhang
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Jincan Ke
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Xiaodie Ren
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Xiaogao Meng
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
- Life Science and Medicine, University of Science and Technology of China, 230026, Hefei, Anhui, China
| | - Lexin Qin
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Jingna Zhang
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Fangru Lu
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Xin Zhou
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
| | - Xi Luo
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Zhen Zhang
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Minhan Wang
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Guangming Wu
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
- Guangzhou Laboratory, 510005, Guangzhou, Guangdong, China
- School of Basic Medical Sciences, Guangzhou Medical University, 510005, Guangzhou, Guangdong, China
| | - Duanqing Pei
- Laboratory of Cell Fate Control, School of Life Sciences, Westlake University, Hangzhou, China
| | - Jiekai Chen
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China
| | - Guizhong Cui
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China.
- Guangzhou Laboratory, 510005, Guangzhou, Guangdong, China.
- School of Basic Medical Sciences, Guangzhou Medical University, 510005, Guangzhou, Guangdong, China.
| | - Shengbao Suo
- Guangzhou Laboratory, 510005, Guangzhou, Guangdong, China.
- The First Affiliated Hospital of Guangzhou Medical University, State Key Laboratory of Respiratory Disease, 510005, Guangzhou, Guangdong, China.
| | - Guangdun Peng
- Center for Cell Lineage and Atlas, Bioland Laboratory, Guangzhou, China.
- Center for Cell Lineage and Development, CAS Key Laboratory of Regenerative Biology, Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, GIBH-HKU Guangdong-Hong Kong Stem Cell and Regenerative Medicine Research Centre, Guangzhou Institutes of Biomedicine and Health, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, 510530, Guangzhou, China.
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4
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Grilli F, Albanesi E, Pelacho B, Prosper F, Decuzzi P, Di Mascolo D. Microstructured Polymeric Fabrics Modulating the Paracrine Activity of Adipose-Derived Stem Cells. Int J Mol Sci 2023; 24:10123. [PMID: 37373273 DOI: 10.3390/ijms241210123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
The deposition of stem cells at sites of injury is a clinically relevant approach to facilitate tissue repair and angiogenesis. However, insufficient cell engraftment and survival require the engineering of novel scaffolds. Here, a regular network of microscopic poly(lactic-co-glycolic acid) (PLGA) filaments was investigated as a promising biodegradable scaffold for human Adipose-Derived Stem Cell (hADSC) tissue integration. Via soft lithography, three different microstructured fabrics were realized where 5 × 5 and 5 × 3 μm PLGA 'warp' and 'weft' filaments crossed perpendicularly with pitch distances of 5, 10 and 20 μm. After hADSC seeding, cell viability, actin cytoskeleton, spatial organization and the secretome were characterized and compared to conventional substrates, including collagen layers. On the PLGA fabric, hADSC re-assembled to form spheroidal-like structures, preserving cell viability and favoring a nonlinear actin organization. Moreover, the secretion of specific factors involved in angiogenesis, the remodeling of the extracellular matrix and stem cell homing was favored on the PLGA fabric as compared to that which occurred on conventional substrates. The paracrine activity of hADSC was microstructure-dependent, with 5 μm PLGA fabric enhancing the expression of factors involved in all three processes. Although more studies are needed, the proposed PLGA fabric would represent a promising alternative to conventional collagen substrates for stem cell implantation and angiogenesis induction.
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Affiliation(s)
- Federica Grilli
- Laboratory of Nanotechnology for Precision Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genoa, Italy
- Department of Informatics, Bioengineering, Robotics, and Systems Engineering (DIBRIS), University of Genoa, 16145 Genoa, Italy
| | - Ennio Albanesi
- Department of Neuroscience and Brain Technologies, Fondazione Istituto Italiano di Tecnologia, 16163 Genoa, Italy
| | - Beatriz Pelacho
- Laboratory of Regenerative Medicine, Center for Applied Medical Research, University of Navarra, 31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Felipe Prosper
- Laboratory of Regenerative Medicine, Center for Applied Medical Research, University of Navarra, 31008 Pamplona, Spain
- Instituto de Investigación Sanitaria de Navarra (IdiSNA), 31008 Pamplona, Spain
| | - Paolo Decuzzi
- Laboratory of Nanotechnology for Precision Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genoa, Italy
| | - Daniele Di Mascolo
- Laboratory of Nanotechnology for Precision Medicine, Fondazione Istituto Italiano di Tecnologia, 16163 Genoa, Italy
- Department of Electrical and Information Engineering, Politecnico di Bari, 70126 Bari, Italy
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5
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Arjmand B, Alavi-Moghadam S, Aghayan HR, Rezaei-Tavirani M, Goodarzi P, Tayanloo-Beik A, Biglar M, Rajaeinejad M, Shouroki FF, Larijani B. How to establish infrastructures to achieve more efficient regenerative medicine? Cell Tissue Bank 2023; 24:1-9. [PMID: 35871425 DOI: 10.1007/s10561-022-10028-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 07/12/2022] [Indexed: 11/25/2022]
Abstract
The field of regenerative medicine (RM) as an innovative technology has the ability to affect the healthcare system. It develops a variety of techniques through stem cell biology, genetics, bioengineering, biomaterial science, and tissue engineering to replace or restore the role of lost, disabled, or aging cells in the human body. However, the field's proficiency has still been underwhelming at the clinical trial level. This could be due to the innovation of such technologies, as well as their incredible nature. Therefore, managing the infrastructure framework for the safe and efficient application of the aforementioned field of science would help in the process of progress. In this context, the current review focuses on how to establish infrastructures for more effective RM.
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Affiliation(s)
- Babak Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Sepideh Alavi-Moghadam
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Reza Aghayan
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Parisa Goodarzi
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Akram Tayanloo-Beik
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmood Biglar
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohsen Rajaeinejad
- AJA Cancer Epidemiology Research and Treatment Center (AJA-CERTC), AJA University of Medical Sciences, Tehran, Iran
| | - Fatemeh Fazeli Shouroki
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
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6
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Elkady E, Nour El-den R, Atiba A, Yasser S. Comparing the effect of demineralized versus hybrid dentin matrices on inducing bone regeneration in New Zealand white rabbits' Mandibular defect. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2023; 124:101346. [PMID: 36470537 DOI: 10.1016/j.jormas.2022.11.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 11/17/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022]
Abstract
OBJECTIVES The aim of this study was to compare the effect of using demineralized dentin matrix (DDM) versus hybrid dentin matrices; Demineralized and undemineralized dentin particles (DDM +UDDM) on inducing bone regeneration in mandibular defects. DESIGN The study was conducted on fifty adult New Zealand rabbits, twenty for preparation of experimental materials and thirty for surgical procedures. They were randomly assigned into 3 equal groups as follow one control group: no treatment and two experimental groups including demineralized group: treated with DDM only; and hybrid group: treated with a hybrid of (50% DDM+50% UDD). A rounded critical size defect (10 mm in diameter- 5 mm in depth) was created in the body of mandible. After 3- and 6-weeks post-surgery, the bone regeneration was evaluated by light microscope, scanning electron microscope and histomorphometry. RESULTS Histological, histomorphometrical observation and SEM revealed that both dentin matrices had largely resorbed and induced new bone formation at both experimental groups compared to the control group, with statistically higher percentage of new bone formation in the hybrid group. CONCLUSION We concluded that although both dentin matrices induced new bone formation; however, hybrid dentin matrix yielded better results compared to DDM group.
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Affiliation(s)
- Eman Elkady
- Oral Biology Department, Faculty of Dentistry, Tanta university, Egypt; Demonstrator of Oral Biology, Faculty of Dentistry, Tanta University, Tanta, Egypt
| | - Ragia Nour El-den
- Oral Biology Department, Faculty of Dentistry, Tanta university, Egypt; Professor of Oral Biology, Faculty of Dentistry, Tanta University, Tanta, Egypt
| | - Ayman Atiba
- Department of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt; Professor of Surgery, Anesthesiology and Radiology, Faculty of Veterinary Medicine, Kafrelsheikh University
| | - Sarah Yasser
- Oral Biology Department, Faculty of Dentistry, Tanta university, Egypt; Assistant Professor of Oral Biology, Faculty of Dentistry, Tanta University, Tanta, Egypt.
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7
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Gattupalli M, Dey P, Poovizhi S, Patel RB, Mishra D, Banerjee S. The Prospects of RNAs and Common Significant Pathways in Cancer Therapy and Regenerative Medicine. Regen Med 2023. [DOI: 10.1007/978-981-19-6008-6_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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8
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Favorable Biological Performance Regarding the Interaction between Gold Nanoparticles and Mesenchymal Stem Cells. Int J Mol Sci 2022; 24:ijms24010005. [PMID: 36613448 PMCID: PMC9819939 DOI: 10.3390/ijms24010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/09/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Gold nanoparticles (AuNPs) are well known to interact with cells, leading to different cell behaviors such as cell proliferation and differentiation capacity. Biocompatibility and biological functions enhanced by nanomedicine are the most concerning factors in clinical approaches. In the present research, AuNP solutions were prepared at concentrations of 1.25, 2.5, 5 and 10 ppm for biocompatibility investigations. Ultraviolet-visible spectroscopy was applied to identify the presence of AuNPs under the various concentrations. Dynamic Light Scattering assay was used for the characterization of the size of the AuNPs. The shape of the AuNPs was observed through a Scanning Electron Microscope. Afterward, the mesenchymal stem cells (MSCs) were treated with a differentiation concentration of AuNP solutions in order to measure the biocompatibility of the nanoparticles. Our results demonstrate that AuNPs at 1.25 and 2.5 ppm could significantly enhance MSC proliferation, decrease reactive oxygen species (ROS) generation and attenuate platelet/monocyte activation. Furthermore, the MSC morphology was observed in the presence of filopodia and lamellipodia while being incubated with 1.25 and 2.5 ppm AuNPs, indicating that the adhesion ability was enhanced by the nanoparticles. The expression of matrix metalloproteinase (MMP-2/9) in MSCs was found to be more highly expressed under 1.25 and 2.5 ppm AuNP treatment, relating to better cell migrating ability. Additionally, the cell apoptosis of MSCs investigated with Annexin-V/PI double staining assay and the Fluorescence Activated Cell Sorting (FACS) method demonstrated the lower population of apoptotic cells in 1.25 and 2.5 ppm AuNP treatments, as compared to high concentrations of AuNPs. Additionally, results from a Western blotting assay explored the possibility that the anti-apoptotic proteins Cyclin-D1 and Bcl-2 were remarkably expressed. Meanwhile, real-time PCR analysis demonstrated that the 1.25 and 2.5 ppm AuNP solutions induced a lower expression of inflammatory cytokines (TNF-α, IL-1β, IFN-γ, IL-6 and IL-8). According to the tests performed on an animal model, AuNP 1.25 and 2.5 ppm treatments exhibited the better biocompatibility performance, including anti-inflammation and endothelialization. In brief, 1.25 and 2.5 ppm of AuNP solution was verified to strengthen the biological functions of MSCs, and thus suggests that AuNPs become the biocompatibility nanomedicine for regeneration research.
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9
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Majhi S. Dynamical robustness of complex networks subject to long-range connectivity. Proc Math Phys Eng Sci 2022. [DOI: 10.1098/rspa.2021.0953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In spite of a few attempts in understanding the dynamical robustness of complex networks, this extremely important subject of research is still in its dawn as compared to the other dynamical processes on networks. We hereby consider the concept of long-range interactions among the dynamical units of complex networks and demonstrate
for the first time
that such a characteristic can have noteworthy impacts on the dynamical robustness of networked systems, regardless of the underlying network topology. We present a comprehensive analysis of this phenomenon on top of diverse network architectures. Such dynamical damages being able to substantially affect the network performance, determining mechanisms that boost the robustness of networks becomes a fundamental question. In this work, we put forward a prescription based upon self-feedback that can efficiently resurrect global rhythmicity of complex networks composed of active and inactive dynamical units, and thus can enhance the network robustness. We have been able to delineate the whole proposition analytically while dealing with all
d
-path adjacency matrices, having an excellent agreement with the numerical results. For the numerical computations, we examine scale-free networks, Watts–Strogatz small-world model and also Erdös–Rényi random network, along with Landau–Stuart oscillators for casting the local dynamics.
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Affiliation(s)
- Soumen Majhi
- Department of Mathematics, Bar-Ilan University, Ramat-Gan 5290002, Israel
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10
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In Vitro Cytological Responses against Laser Photobiomodulation for Periodontal Regeneration. Int J Mol Sci 2020; 21:ijms21239002. [PMID: 33256246 PMCID: PMC7730548 DOI: 10.3390/ijms21239002] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 11/18/2020] [Accepted: 11/21/2020] [Indexed: 02/06/2023] Open
Abstract
Periodontal disease is a chronic inflammatory disease caused by periodontal bacteria. Recently, periodontal phototherapy, treatment using various types of lasers, has attracted attention. Photobiomodulation, the biological effect of low-power laser irradiation, has been widely studied. Although many types of lasers are applied in periodontal phototherapy, molecular biological effects of laser irradiation on cells in periodontal tissues are unclear. Here, we have summarized the molecular biological effects of diode, Nd:YAG, Er:YAG, Er,Cr:YSGG, and CO2 lasers irradiation on cells in periodontal tissues. Photobiomodulation by laser irradiation enhanced cell proliferation and calcification in osteoblasts with altering gene expression. Positive effects were observed in fibroblasts on the proliferation, migration, and secretion of chemokines/cytokines. Laser irradiation suppressed gene expression related to inflammation in osteoblasts, fibroblasts, human periodontal ligament cells (hPDLCs), and endothelial cells. Furthermore, recent studies have revealed that laser irradiation affects cell differentiation in hPDLCs and stem cells. Additionally, some studies have also investigated the effects of laser irradiation on endothelial cells, cementoblasts, epithelial cells, osteoclasts, and osteocytes. The appropriate irradiation power was different for each laser apparatus and targeted cells. Thus, through this review, we tried to shed light on basic research that would ultimately lead to clinical application of periodontal phototherapy in the future.
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11
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Shang F, Yu Y, Liu S, Ming L, Zhang Y, Zhou Z, Zhao J, Jin Y. Advancing application of mesenchymal stem cell-based bone tissue regeneration. Bioact Mater 2020; 6:666-683. [PMID: 33005830 PMCID: PMC7509590 DOI: 10.1016/j.bioactmat.2020.08.014] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 08/07/2020] [Accepted: 08/15/2020] [Indexed: 12/11/2022] Open
Abstract
Reconstruction of bone defects, especially the critical-sized defects, with mechanical integrity to the skeleton is important for a patient's rehabilitation, however, it still remains challenge. Utilizing biomaterials of human origin bone tissue for therapeutic purposes has provided a facilitated approach that closely mimics the critical aspects of natural bone tissue with regard to its properties. However, not only efficacious and safe but also cost-effective and convenient are important for regenerative biomaterials to achieve clinical translation and commercial success. Advances in our understanding of regenerative biomaterials and their roles in new bone formation potentially opened a new frontier in the fast-growing field of regenerative medicine. Taking inspiration from the role and multicomponent construction of native extracellular matrix (ECM) for cell accommodation, the ECM-mimicking biomaterials and the naturally decellularized ECM scaffolds were used to create new tissues for bone restoration. On the other hand, with the going deep in understanding of mesenchymal stem cells (MSCs), they have shown great promise to jumpstart and facilitate bone healing even in diseased microenvironments with pharmacology-based endogenous MSCs rescue/mobilization, systemic/local infusion of MSCs for cytotherapy, biomaterials-based approaches, cell-sheets/-aggregates technology and usage of subcellular vesicles of MSCs to achieve scaffolds-free or cell-free delivery system, all of them have been shown can improve MSCs-mediated regeneration in preclinical studies and several clinical trials. Here, following an overview discussed autogenous/allogenic and ECM-based bone biomaterials for reconstructive surgery and applications of MSCs-mediated bone healing and tissue engineering to further offer principles and effective strategies to optimize MSCs-based bone regeneration. Focusing on MSCs based bone regeneration. Discussed cytotherapy, cell-free therapies and cell-aggregates technology in detail. Stating the approaches of MSCs in diseased microenvironments.
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Affiliation(s)
- Fengqing Shang
- State Key Laboratory of Military Stomatology & National Clinical Research, Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- Department of Stomatology, The 306th Hospital of PLA, Beijing, 100101, China
| | - Yang Yu
- Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, 250012, China
| | - Shiyu Liu
- State Key Laboratory of Military Stomatology & National Clinical Research, Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Leiguo Ming
- State Key Laboratory of Military Stomatology & National Clinical Research, Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Yongjie Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research, Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Zhifei Zhou
- Department of Stomatology, General Hospital of Tibetan Military Command, Lhasa, 850000, China
| | - Jiayu Zhao
- Bureau of Service for Veteran Cadres of PLA in Beijing, Beijing, 100001, China
| | - Yan Jin
- State Key Laboratory of Military Stomatology & National Clinical Research, Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Center for Tissue Engineering, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China
- Corresponding author.
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12
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Aghazade M, Samiei M, Imani M, Aghazadeh Z, Alizadeh E, Rezaie F. Evaluation of the adhesion of human dental pulp stem cells to different endodontic biomaterials before and after setting. J Dent Res Dent Clin Dent Prospects 2020; 14:97-103. [PMID: 32908650 PMCID: PMC7464226 DOI: 10.34172/joddd.2020.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 03/14/2020] [Indexed: 11/09/2022] Open
Abstract
Background. Stem cell-based treatment modalities have been potential strategies for tissue regeneration in many conditions. Several studies have evaluated the biologic properties of DPSCs and their efficacy in the treatment of a variety of diseases. The present study was undertaken to evaluate the adhesion behavior of DPSCs on different endodontic materials before and after setting. Methods. The crowns of the selected teeth were removed, and the root canals were prepared and obturated with gutta-percha and AH26 sealer. A retrograde cavity was prepared at root ends. Different materials were placed in the cavities. Then the samples were attached to the wells with the use of a chemical glue. Dental pulp stem cells were allowed to proliferate to reach a count of 2 million and transferred to -12well plates in association with a culture medium. Finally, the samples attached to the wells were exposed to the stem cells immersed in the culture medium before and after setting. Then adhesion of the stem cells was evaluated using SEM. Results. The SEM results showed cellular adhesion in the samples containing CEM cement both before and after setting. The samples containing MTA Angelus and ProRoot MTA exhibited cellular adhesion before setting, with no cellular adhesion after setting. The samples containing AH26 and MTA Fillapex sealers exhibited cellular adhesion after setting, with no adhesion before setting. The samples containing simvastatin exhibited no cellular adhesion before setting; this material had dissolved in the culture medium after setting evaluation. Conclusion. The results of the present study showed that of all the materials tested, CEM cement had the highest capacity for dental pulp stem cell adhesion.
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Affiliation(s)
- Marzie Aghazade
- Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Samiei
- Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Zahra Aghazadeh
- Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Effat Alizadeh
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, University of Medical Sciences, Tabriz, Iran
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13
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Sun DZ, Abelson B, Babbar P, Damaser MS. Harnessing the mesenchymal stem cell secretome for regenerative urology. Nat Rev Urol 2020; 16:363-375. [PMID: 30923338 DOI: 10.1038/s41585-019-0169-3] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The extensive arsenal of bioactive molecules secreted by mesenchymal stem cells (MSCs), known as the secretome, has demonstrated considerable therapeutic benefit in regenerative medicine. Investigation into the therapeutic potential of the secretome has enabled researchers to replicate the anti-inflammatory, pro-angiogenic and trophic effects of stem cells without the need for the cells themselves. Furthermore, treatment with the MSC secretome could circumvent hurdles associated with cellular therapy, including oncogenic transformation, immunoreactivity and cost. Thus, a clear rationale exists for investigating the therapeutic potential of the MSC secretome in regenerative urology. Indeed, preclinical studies have demonstrated the therapeutic benefits of the MSC secretome in models of stress urinary incontinence, renal disease, bladder dysfunction and erectile dysfunction. However, the specific mechanisms underpinning therapeutic activity are unclear and require further research before clinical translation. Improvements in current proteomic methods used to characterize the secretome will be necessary to provide further insight into stem cells and their secretome in regenerative urology.
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Affiliation(s)
- Daniel Z Sun
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA. .,Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, OH, USA. .,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.
| | - Benjamin Abelson
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA.,Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, OH, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Paurush Babbar
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA.,Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, OH, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Margot S Damaser
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA.,Cleveland Clinic Lerner College of Medicine at Case Western Reserve University, Cleveland, OH, USA.,Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.,Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
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14
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Iga C, Agata T, Marcin Ł, Natalia F, Justyna KL. Ciprofloxacin-Modified Degradable Hybrid Polyurethane-Polylactide Porous Scaffolds Developed for Potential Use as an Antibacterial Scaffold for Regeneration of Skin. Polymers (Basel) 2020; 12:E171. [PMID: 31936529 PMCID: PMC7022267 DOI: 10.3390/polym12010171] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/20/2019] [Accepted: 12/21/2019] [Indexed: 01/21/2023] Open
Abstract
The aim of the performed study was to fabricate an antibacterial and degradable scaffold that may be used in the field of skin regeneration. To reach the degradation criterion for the biocompatible polyurethane (PUR), obtained by using amorphous α,ω-dihydroxy(ethylene-butylene adipate) macrodiol (PEBA), was used and processed with so-called "fast-degradable" polymer polylactide (PLA) (5 or 10 wt %). To meet the antibacterial requirement obtained, hybrid PUR-PLA scaffolds (HPPS) were modified with ciprofloxacin (Cipro) (2 or 5 wt %) and the fluoroquinolone antibiotic inhibiting growth of bacteria, such as Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus aureus, which are the main causes of wound infections. Performed studies showed that Cipro-modified HPPS, obtained by using 5% of PLA, possess suitable mechanical characteristics, morphology, degradation rates, and demanded antimicrobial properties to be further developed as potential scaffolds for skin tissue engineering.
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Affiliation(s)
- Carayon Iga
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland;
| | - Terebieniec Agata
- Department of Molecular Biotechnology and Microbiology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland; (T.A.); (F.N.)
| | - Łapiński Marcin
- Department of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland;
| | - Filipowicz Natalia
- Department of Molecular Biotechnology and Microbiology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland; (T.A.); (F.N.)
| | - Kucińska-Lipka Justyna
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland;
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15
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Bhartiya A, Madi K, Disney CM, Courtois L, Jupe A, Zhang F, Bodey AJ, Lee P, Rau C, Robinson IK, Yusuf M. Phase-contrast 3D tomography of HeLa cells grown in PLLA polymer electrospun scaffolds using synchrotron X-rays. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:158-163. [PMID: 31868748 DOI: 10.1107/s1600577519015583] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/18/2019] [Indexed: 06/10/2023]
Abstract
Advanced imaging is useful for understanding the three-dimensional (3D) growth of cells. X-ray tomography serves as a powerful noninvasive, nondestructive technique that can fulfill these purposes by providing information about cell growth within 3D platforms. There are a limited number of studies taking advantage of synchrotron X-rays, which provides a large field of view and suitable resolution to image cells within specific biomaterials. In this study, X-ray synchrotron radiation microtomography at Diamond Light Source and advanced image processing were used to investigate cellular infiltration of HeLa cells within poly L-lactide (PLLA) scaffolds. This study demonstrates that synchrotron X-rays using phase contrast is a useful method to understand the 3D growth of cells in PLLA electrospun scaffolds. Two different fiber diameter (2 and 4 µm) scaffolds with different pore sizes, grown over 2, 5 and 8 days in vitro, were examined for infiltration and cell connectivity. After performing visualization by segmentation of the cells from the fibers, the results clearly show deeper cell growth and higher cellular interconnectivity in the 4 µm fiber diameter scaffold. This indicates the potential for using such 3D technology to study cell-scaffold interactions for future medical use.
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Affiliation(s)
- A Bhartiya
- London Centre for Nanotechnology, University College London, London WC1H 0AH, UK
| | - K Madi
- 3DMagination Ltd, Atlas Building, Fermi Avenue, Harwell, Didcot OX11 0QX, UK
| | - C M Disney
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
| | - L Courtois
- 3DMagination Ltd, Atlas Building, Fermi Avenue, Harwell, Didcot OX11 0QX, UK
| | - A Jupe
- Department of Applied Computing, The University of Buckingham, UK
| | - F Zhang
- London Centre for Nanotechnology, University College London, London WC1H 0AH, UK
| | - A J Bodey
- Diamond Light Source, Oxfordshire OX11 0DE, UK
| | - P Lee
- Mechanical Engineering, University College London, London WC1E 7JE, UK
| | - C Rau
- Diamond Light Source, Oxfordshire OX11 0DE, UK
| | - I K Robinson
- London Centre for Nanotechnology, University College London, London WC1H 0AH, UK
| | - M Yusuf
- London Centre for Nanotechnology, University College London, London WC1H 0AH, UK
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16
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Ramasubramanian L, Kumar P, Wang A. Engineering Extracellular Vesicles as Nanotherapeutics for Regenerative Medicine. Biomolecules 2019; 10:E48. [PMID: 31905611 PMCID: PMC7023093 DOI: 10.3390/biom10010048] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 12/24/2019] [Accepted: 12/26/2019] [Indexed: 01/01/2023] Open
Abstract
Long thought of to be vesicles that primarily recycled waste biomolecules from cells, extracellular vesicles (EVs) have now emerged as a new class of nanotherapeutics for regenerative medicine. Recent studies have proven their potential as mediators of cell proliferation, immunomodulation, extracellular matrix organization and angiogenesis, and are currently being used as treatments for a variety of diseases and injuries. They are now being used in combination with a variety of more traditional biomaterials and tissue engineering strategies to stimulate tissue repair and wound healing. However, the clinical translation of EVs has been greatly slowed due to difficulties in EV isolation and purification, as well as their limited yields and functional heterogeneity. Thus, a field of EV engineering has emerged in order to augment the natural properties of EVs and to recapitulate their function in semi-synthetic and synthetic EVs. Here, we have reviewed current technologies and techniques in this growing field of EV engineering while highlighting possible future applications for regenerative medicine.
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Affiliation(s)
- Lalithasri Ramasubramanian
- Surgical Bioengineering Laboratory, Department of Surgery, School of Medicine, University of California–Davis, Sacramento, CA 95817, USA (P.K.)
- Department of Biomedical Engineering, University of California–Davis, Davis, CA 95616, USA
| | - Priyadarsini Kumar
- Surgical Bioengineering Laboratory, Department of Surgery, School of Medicine, University of California–Davis, Sacramento, CA 95817, USA (P.K.)
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children–Northern California, Sacramento, CA 95817, USA
| | - Aijun Wang
- Surgical Bioengineering Laboratory, Department of Surgery, School of Medicine, University of California–Davis, Sacramento, CA 95817, USA (P.K.)
- Department of Biomedical Engineering, University of California–Davis, Davis, CA 95616, USA
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children–Northern California, Sacramento, CA 95817, USA
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17
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Nathan N, Sileo C, Thouvenin G, Berdah L, Delestrain C, Manali E, Papiris S, Léger PL, Pointe HDL, l'Hermine AC, Clement A. Pulmonary Fibrosis in Children. J Clin Med 2019; 8:E1312. [PMID: 31455000 PMCID: PMC6780823 DOI: 10.3390/jcm8091312] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/14/2019] [Accepted: 08/21/2019] [Indexed: 12/20/2022] Open
Abstract
: Pulmonary fibrosis (PF) is a very rare condition in children, which may be observed in specific forms of interstitial lung disease. None of the clinical, radiological, or histological descriptions used for PF diagnosis in adult patients, especially in situations of idiopathic PF, can apply to pediatric situations. This observation supports the view that PF expression may differ with age and, most likely, may cover distinct entities. The present review aims at summarizing the current understanding of PF pathophysiology in children and identifying suitable diagnostic criteria.
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Affiliation(s)
- Nadia Nathan
- Pediatric Pulmonology Department, Reference Center for Rare Lung Diseases (RespiRare), Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), 75012 Paris, France.
- Inserm UMR_S933, Sorbonne Université, 75012 Paris, France.
| | - Chiara Sileo
- Pediatric Radiology Department, Armand Trousseau Hospital, AP-HP, 75012 Paris, France
| | - Guillaume Thouvenin
- Pediatric Pulmonology Department, Reference Center for Rare Lung Diseases (RespiRare), Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), 75012 Paris, France
| | - Laura Berdah
- Pediatric Pulmonology Department, Reference Center for Rare Lung Diseases (RespiRare), Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), 75012 Paris, France
| | - Céline Delestrain
- Pediatric Pulmonology Department, Reference Center for Rare Lung Diseases (RespiRare), Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), 75012 Paris, France
| | - Effrosyne Manali
- nd Pulmonary Medicine Department, General University Hospital "Attikon", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Spyros Papiris
- nd Pulmonary Medicine Department, General University Hospital "Attikon", Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Pierre-Louis Léger
- Intensive Care Unit, Armand Trousseau Hospital, AP-HP, 75012 Paris, France
| | | | | | - Annick Clement
- Pediatric Pulmonology Department, Reference Center for Rare Lung Diseases (RespiRare), Armand Trousseau Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), 75012 Paris, France
- Inserm UMR_S933, Sorbonne Université, 75012 Paris, France
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18
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Lin C, Chiu P, Hsueh Y, Shieh S, Wu C, Wong T, Chuong C, Hughes MW. Regeneration of rete ridges in Lanyu pig (
Sus scrofa
): Insights for human skin wound healing. Exp Dermatol 2019; 28:472-479. [DOI: 10.1111/exd.13875] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 12/23/2018] [Accepted: 01/07/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Chein‐Hong Lin
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Department of Basic MedicineCollege of MedicineNational Cheng Kung University Tainan Taiwan
| | - Po‐Yuan Chiu
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Institute of Clinical MedicineNational Cheng Kung University Hospital Tainan Taiwan
| | - Yuan‐Yu Hsueh
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Division of Plastic and Reconstructive SurgeryDepartment of SurgeryNational Cheng Kung University Hospital Tainan Taiwan
| | - Shyh‐Jou Shieh
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Division of Plastic and Reconstructive SurgeryDepartment of SurgeryNational Cheng Kung University Hospital Tainan Taiwan
| | - Chia‐Ching Wu
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Department of Basic MedicineCollege of MedicineNational Cheng Kung University Tainan Taiwan
| | - Tak‐Wah Wong
- Department of DermatologyNational Cheng Kung University Hospital Tainan Taiwan
| | - Cheng‐Ming Chuong
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Department of Basic MedicineCollege of MedicineNational Cheng Kung University Tainan Taiwan
- Institute of Clinical MedicineNational Cheng Kung University Hospital Tainan Taiwan
- Department of PathologyUniversity of Southern California Los Angeles California
| | - Michael W. Hughes
- International Center for Wound Repair and RegenerationNational Cheng Kung University Tainan Taiwan
- Institute of Clinical MedicineNational Cheng Kung University Hospital Tainan Taiwan
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19
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Hughes MW, Jiang TX, Plikus MV, Guerrero-Juarez CF, Lin CH, Schafer C, Maxson R, Widelitz RB, Chuong CM. Msx2 Supports Epidermal Competency during Wound-Induced Hair Follicle Neogenesis. J Invest Dermatol 2018; 138:2041-2050. [PMID: 29577917 PMCID: PMC6109435 DOI: 10.1016/j.jid.2018.02.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 02/06/2018] [Accepted: 02/10/2018] [Indexed: 12/11/2022]
Abstract
Cutaneous wounds in adult mammals typically heal by scarring. However, large full-thickness wounds undergo wound-induced hair follicle neogenesis (WIHN), a form of regeneration. Here, we show that WIHN requires transient expression of epidermal Msx2 in two phases: the wound margin early and the wound center late. Msx2 expression is present in the migrating epithelium during early wound healing and then presents in the epithelium and mesenchyme later in the wound center. WIHN is abrogated in germline and epithelial-specific Msx2 mutant mice. Unlike the full-length Msx2 promoter, a minimal Msx2 promoter fails activation in the wound center, suggesting complex regulation of Msx2 expression. The Msx2 promoter binding sites include Tcf/Lef, Jun/Creb, Pax3, and three SMAD sites. However, basal epithelial-induced BMP suppression by noggin overexpression did not affect WIHN. We propose that Msx2 signaling is required for the epidermis to acquire spatiotemporal competence during WIHN. Topologically, hair regeneration dominates in the wound center, coinciding with late Msx2 expression. Together, these results suggest that intrinsic Msx2 expression supports epithelial competency during hair follicle neogenesis. This work provides insight into endogenous mechanisms modulating competency of adult epidermal progenitors for mammalian ectodermal appendage neogenesis, and offers the target Msx2 for future regeneration-promoting therapies.
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Affiliation(s)
- Michael W Hughes
- Department of Pathology, School of Medicine, University of Southern California, Los Angeles, California, USA; International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Ting-Xin Jiang
- Department of Pathology, School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Maksim V Plikus
- Department of Developmental and Cell Biology, School of Biological Sciences, University of California Irvine, Irvine, California, USA; Stem Cell Research Center, Center for Complex Biological Systems, University of California Irvine, Irvine, California, USA
| | - Christian Fernando Guerrero-Juarez
- Department of Developmental and Cell Biology, School of Biological Sciences, University of California Irvine, Irvine, California, USA; Stem Cell Research Center, Center for Complex Biological Systems, University of California Irvine, Irvine, California, USA
| | - Chien-Hong Lin
- International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Department of Basic Medicine, National Cheng Kung University College of Medicine, Tainan, Taiwan
| | - Christopher Schafer
- Department of Biochemistry and Molecular Biology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Robert Maxson
- Department of Biochemistry and Molecular Biology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Randall B Widelitz
- Department of Pathology, School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Cheng-Ming Chuong
- Department of Pathology, School of Medicine, University of Southern California, Los Angeles, California, USA; International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Department of Basic Medicine, National Cheng Kung University College of Medicine, Tainan, Taiwan; Integrative Stem Cell Center, China Medical University Hospital, China Medical University, 2 Yude Road, North District, Taichung, Taiwan.
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20
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Injectable Hyaluronic Acid- co-Gelatin Cryogels for Tissue-Engineering Applications. MATERIALS 2018; 11:ma11081374. [PMID: 30087295 PMCID: PMC6119876 DOI: 10.3390/ma11081374] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/01/2018] [Accepted: 08/03/2018] [Indexed: 12/31/2022]
Abstract
Polymeric scaffolds such as hydrogels can be engineered to restore, maintain, or improve impaired tissues and organs. However, most hydrogels require surgical implantation that can cause several complications such as infection and damage to adjacent tissues. Therefore, developing minimally invasive strategies is of critical importance for these purposes. Herein, we developed several injectable cryogels made out of hyaluronic acid and gelatin for tissue-engineering applications. The physicochemical properties of hyaluronic acid combined with the intrinsic cell-adhesion properties of gelatin can provide suitable physical support for the attachment, survival, and spreading of cells. The physical characteristics of pure gelatin cryogels, such as mechanics and injectability, were enhanced once copolymerized with hyaluronic acid. Reciprocally, the adhesion of 3T3 cells cultured in hyaluronic acid cryogels was enhanced when formulated with gelatin. Furthermore, cryogels had a minimal effect on bone marrow dendritic cell activation, suggesting their cytocompatibility. Finally, in vitro studies revealed that copolymerizing gelatin with hyaluronic acid did not significantly alter their respective intrinsic biological properties. These findings suggest that hyaluronic acid-co-gelatin cryogels combined the favorable inherent properties of each biopolymer, providing a mechanically robust, cell-responsive, macroporous, and injectable platform for tissue-engineering applications.
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21
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Hu MS, Longaker MT. Wound Healing Research at the Hagey Laboratory for Pediatric Regenerative Medicine at Stanford University School of Medicine. Adv Wound Care (New Rochelle) 2018; 7:257-261. [PMID: 30087801 DOI: 10.1089/wound.2018.0787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 11/12/2022] Open
Affiliation(s)
- Michael S. Hu
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
| | - Michael T. Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, California
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22
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El Amri M, Fitzgerald U, Schlosser G. MARCKS and MARCKS-like proteins in development and regeneration. J Biomed Sci 2018; 25:43. [PMID: 29788979 PMCID: PMC5964646 DOI: 10.1186/s12929-018-0445-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 05/07/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The Myristoylated Alanine-Rich C-kinase Substrate (MARCKS) and MARCKS-like protein 1 (MARCKSL1) have a wide range of functions, ranging from roles in embryonic development to adult brain plasticity and the inflammatory response. Recently, both proteins have also been identified as important players in regeneration. Upon phosphorylation by protein kinase C (PKC) or calcium-dependent calmodulin-binding, MARCKS and MARCKSL1 translocate from the membrane into the cytosol, modulating cytoskeletal actin dynamics and vesicular trafficking and activating various signal transduction pathways. As a consequence, the two proteins are involved in the regulation of cell migration, secretion, proliferation and differentiation in many different tissues. MAIN BODY Throughout vertebrate development, MARCKS and MARCKSL1 are widely expressed in tissues derived from all germ layers, with particularly strong expression in the nervous system. They have been implicated in the regulation of gastrulation, myogenesis, brain development, and other developmental processes. Mice carrying loss of function mutations in either Marcks or Marcksl1 genes die shortly after birth due to multiple deficiencies including detrimental neural tube closure defects. In adult vertebrates, MARCKS and MARCKL1 continue to be important for multiple regenerative processes including peripheral nerve, appendage, and tail regeneration, making them promising targets for regenerative medicine. CONCLUSION This review briefly summarizes the molecular interactions and cellular functions of MARCKS and MARCKSL1 proteins and outlines their vital roles in development and regeneration.
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Affiliation(s)
- Mohamed El Amri
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Biomedical Sciences Building, Newcastle Road, Galway, Ireland
| | - Una Fitzgerald
- Galway Neuroscience Centre, School of Natural Sciences, Biomedical Sciences Building, National University of Ireland, Newcastle Road, Galway, Ireland
| | - Gerhard Schlosser
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Biomedical Sciences Building, Newcastle Road, Galway, Ireland. .,School of Natural Sciences and Regenerative Medicine Institute (REMEDI), National University of Ireland, Galway, Biomedical Sciences Building, Newcastle Road, Galway, Ireland.
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Kundu S, Majhi S, Ghosh D. Resumption of dynamism in damaged networks of coupled oscillators. Phys Rev E 2018; 97:052313. [PMID: 29906966 DOI: 10.1103/physreve.97.052313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Indexed: 06/08/2023]
Abstract
Deterioration in dynamical activities may come up naturally or due to environmental influences in a massive portion of biological and physical systems. Such dynamical degradation may have outright effect on the substantive network performance. This requires us to provide some proper prescriptions to overcome undesired circumstances. In this paper, we present a scheme based on external feedback that can efficiently revive dynamism in damaged networks of active and inactive oscillators and thus enhance the network survivability. Both numerical and analytical investigations are performed in order to verify our claim. We also provide a comparative study on the effectiveness of this mechanism for feedbacks to the inactive group or to the active group only. Most importantly, resurrection of dynamical activity is realized even in time-delayed damaged networks, which are considered to be less persistent against deterioration in the form of inactivity in the oscillators. Furthermore, prominence in our approach is substantiated by providing evidence of enhanced network persistence in complex network topologies taking small-world and scale-free architectures, which makes the proposed remedy quite general. Besides the study in the network of Stuart-Landau oscillators, affirmative influence of external feedback has been justified in the network of chaotic Rössler systems as well.
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Affiliation(s)
- Srilena Kundu
- Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Soumen Majhi
- Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
| | - Dibakar Ghosh
- Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 B. T. Road, Kolkata 700108, India
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24
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Mendes BB, Gómez-Florit M, Babo PS, Domingues RM, Reis RL, Gomes ME. Blood derivatives awaken in regenerative medicine strategies to modulate wound healing. Adv Drug Deliv Rev 2018; 129:376-393. [PMID: 29288732 DOI: 10.1016/j.addr.2017.12.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 12/04/2017] [Accepted: 12/22/2017] [Indexed: 02/06/2023]
Abstract
Blood components play key roles in the modulation of the wound healing process and, together with the provisional fibrin matrix ability to selectively bind bioactive molecules and control its spatial-temporal presentation, define the complex microenvironment that characterize this biological process. As a biomimetic approach, the use of blood derivatives in regenerative strategies has awakened as a source of multiple therapeutic biomolecules. Nevertheless, and despite their clinical relevance, blood derivatives have been showing inconsistent therapeutic results due to several factors, including proper control over their delivery mechanisms. Herein, we highlight recent trends on the use biomaterials to protect, sequester and deliver these pools of biomolecules in tissue engineering and regenerative medicine approaches. Particular emphasis is given to strategies that enable to control their spatiotemporal delivery and improve the selectivity of presentation profiles of the biomolecules derived from blood derivatives rich in platelets. Finally, we discussed possible directions for biomaterials design to potentiate the aimed regenerative effects of blood derivatives and achieve efficient therapies.
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25
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Hsu CK, Lin HH, Harn HIC, Hughes MW, Tang MJ, Yang CC. Mechanical forces in skin disorders. J Dermatol Sci 2018; 90:232-240. [PMID: 29567352 DOI: 10.1016/j.jdermsci.2018.03.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 03/05/2018] [Indexed: 01/08/2023]
Abstract
Mechanical forces are known to regulate homeostasis of the skin and play a role in the pathogenesis of skin diseases. The epidermis consists of keratinocytes that are tightly adhered to each other by cell junctions. Defects in keratins or desmosomal/hemidesmosomal proteins lead to the attenuation of mechanical strength and formation of intraepidermal blisters in the case of epidermolysis bullosa simplex. The dermis is rich in extracellular matrix, especially collagen, and provides the majority of tensile force in the skin. Keloid and hypertrophic scar, which is the result of over-production of collagen by fibroblasts during the wound healing, are associated with extrinsic tensile forces and changes of intrinsic mechanical properties of the cell. Increasing evidences shows that stiffness of the skin environment determines the regenerative ability during wound healing process. Mechanotransduction pathways are also involved in the morphogenesis and cyclic growth of hair follicles. The development of androgenetic alopecia is correlated to tensile forces generated by the fibrous tissue underlying the scalp. Acral melanoma predominantly occurs in the weight-bearing area of the foot suggesting the role of mechanical stress. Increased dermal stiffness from fibrosis might be the cause of recessive dystrophic epidermolysis bullosa associated squamous cell carcinoma. Strategies to change the mechanical forces or modify the mechanotransduction signals may lead to a new way to treat skin diseases and promote skin regeneration.
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Affiliation(s)
- Chao-Kai Hsu
- Department of Dermatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
| | - Hsi-Hui Lin
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hans I-Chen Harn
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Michael W Hughes
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Jer Tang
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chao-Chun Yang
- Department of Dermatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan.
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26
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Harn HIC, Ogawa R, Hsu CK, Hughes MW, Tang MJ, Chuong CM. The tension biology of wound healing. Exp Dermatol 2017; 28:464-471. [PMID: 29105155 DOI: 10.1111/exd.13460] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2017] [Indexed: 12/30/2022]
Abstract
Following skin wounding, the healing outcome can be: regeneration, repair with normal scar tissue, repair with hypertrophic scar tissue or the formation of keloids. The role of chemical factors in wound healing has been extensively explored, and while there is evidence suggesting the role of mechanical forces, its influence is much less well defined. Here, we provide a brief review on the recent progress of the role of mechanical force in skin wound healing by comparing laboratory mice, African spiny mice, fetal wound healing and adult scar keloid formation. A comparison across different species may provide insight into key regulators. Interestingly, some findings suggest tension can induce an immune response, and this provides a new link between mechanical and chemical forces. Clinically, manipulating skin tension has been demonstrated to be effective for scar prevention and treatment, but not for tissue regeneration. Utilising this knowledge, specialists may modulate regulatory factors and develop therapeutic strategies to reduce scar formation and promote regeneration.
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Affiliation(s)
- Hans I-Chen Harn
- International Research Center of Wound Repair and Regeneration (iWRR), National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Rei Ogawa
- Department of Plastic, Reconstructive and Aesthetic Surgery, Nippon Medical School, Tokyo, Japan
| | - Chao-Kai Hsu
- International Research Center of Wound Repair and Regeneration (iWRR), National Cheng Kung University, Tainan, Taiwan.,Department of Dermatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Michael W Hughes
- International Research Center of Wound Repair and Regeneration (iWRR), National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Jer Tang
- International Research Center of Wound Repair and Regeneration (iWRR), National Cheng Kung University, Tainan, Taiwan.,Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Ming Chuong
- International Research Center of Wound Repair and Regeneration (iWRR), National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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Kundu S, Majhi S, Sasmal SK, Ghosh D, Rakshit B. Survivability of a metapopulation under local extinctions. Phys Rev E 2017; 96:062212. [PMID: 29347456 DOI: 10.1103/physreve.96.062212] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 06/07/2023]
Abstract
A metapopulation structure in landscape ecology comprises a group of interacting spatially separated subpopulations or patches of the same species that may experience several local extinctions. This makes the investigation of survivability (in the form of global oscillation) of a metapopulation on top of diverse dispersal topologies extremely crucial. However, among various dispersal topologies in ecological networks, which one can provide higher metapopulation survivability under local extinction is still not well explored. In this article, we scrutinize the robustness of an ecological network consisting of prey-predator patches having Holling type I functional response, against progressively extinct population patches. We present a comprehensive study on this while considering global, small-world, and scale-free dispersal of the subpopulations. Furthermore, we extend our work in enhancing survivability in the form of sustained global oscillation by introducing asymmetries in the dispersal rates of the considered species. Our findings affirm that the asynchrony among the patches plays an important role in the survivability of a metapopulation. In order to demonstrate the model independence of the observed phenomenon, we perform a similar analysis for patches exhibiting Holling type II functional response. On the grounds of the obtained results, our work is expected to provide a better perception of the influence of dispersal arrangements on the global survivability of ecological networks.
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Affiliation(s)
- Srilena Kundu
- Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 700108, India
| | - Soumen Majhi
- Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 700108, India
| | - Sourav Kumar Sasmal
- Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata 700108, India
| | - Dibakar Ghosh
- Physics and Applied Mathematics Unit, Indian Statistical Institute, Kolkata 700108, India
| | - Biswambhar Rakshit
- Department of Mathematics, Amrita School of Engineering-Coimbatore Amrita Vishwa Vidyapeetham, India
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28
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Tan R, Yang X, Shen Y. Robot-aided electrospinning toward intelligent biomedical engineering. ROBOTICS AND BIOMIMETICS 2017; 4:17. [PMID: 29170731 PMCID: PMC5681621 DOI: 10.1186/s40638-017-0075-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/01/2017] [Indexed: 01/01/2023]
Abstract
The rapid development of robotics offers new opportunities for the traditional biofabrication in higher accuracy and controllability, which provides great potentials for the intelligent biomedical engineering. This paper reviews the state of the art of robotics in a widely used biomaterial fabrication process, i.e., electrospinning, including its working principle, main applications, challenges, and prospects. First, the principle and technique of electrospinning are introduced by categorizing it to melt electrospinning, solution electrospinning, and near-field electrospinning. Then, the applications of electrospinning in biomedical engineering are introduced briefly from the aspects of drug delivery, tissue engineering, and wound dressing. After that, we conclude the existing problems in traditional electrospinning such as low production, rough nanofibers, and uncontrolled morphology, and then discuss how those problems are addressed by robotics via four case studies. Lastly, the challenges and outlooks of robotics in electrospinning are discussed and prospected.
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Affiliation(s)
- Rong Tan
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
| | - Xiong Yang
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
| | - Yajing Shen
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
- Centre for Robotics and Automation, CityU Shen Zhen Research Institute, Shen Zhen, China
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29
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Parra M, Olate S, Cantín M. Clinical and biological analysis in graftless maxillary sinus lift. J Korean Assoc Oral Maxillofac Surg 2017; 43:214-220. [PMID: 28875135 PMCID: PMC5583195 DOI: 10.5125/jkaoms.2017.43.4.214] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/05/2016] [Accepted: 08/26/2016] [Indexed: 11/07/2022] Open
Abstract
Maxillary sinus lift for dental implant installation is a well-known and versatile technique; new techniques are presented based on the physiology of intrasinus bone repair. The aim of this review was to determine the status of graftless maxillary sinus lift and analyze its foundations and results. A search was conducted of the literature between 1995 and 2015 in the Medline, ScienceDirect, and SciELO databases using the keywords "maxillary sinus lift," "blood clot," "graftless maxillary sinus augmentation," and "dental implant placement." Ten articles were selected for our analysis of this technique and its results. Despite the limited information, cases that were followed for at least six months and up to four years had a 90% success rate. Published techniques included a lateral window, elevation of the sinus membrane, drilling and dental implant installation, descent of the membrane with variations in the installation of the lateral wall access and suturing. The physiology behind this new bone formation response and the results of the present research were also discussed. We concluded that this is a promising and viable technique under certain inclusion criteria.
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Affiliation(s)
- Marcelo Parra
- Master in Dental Science Program, Universidad de La Frontera, Temuco, Chile
| | - Sergio Olate
- Department of Oral and Maxillofacial Surgery, Universidad de La Frontera, Temuco, Chile.,Center of Excellence in Surgical and Morphological Studies (CEMYQ), Universidad de La Frontera, Temuco, Chile.,Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile
| | - Mario Cantín
- Center of Excellence in Surgical and Morphological Studies (CEMYQ), Universidad de La Frontera, Temuco, Chile.,Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile
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30
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Barata D, Dias P, Wieringa P, van Blitterswijk C, Habibovic P. Cell-instructive high-resolution micropatterned polylactic acid surfaces. Biofabrication 2017; 9:035004. [PMID: 28671108 DOI: 10.1088/1758-5090/aa7d24] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Micro and nanoscale topographical structuring of biomaterial surfaces has been a valuable tool for influencing cell behavior, including cell attachment, proliferation and differentiation. However, most fabrication techniques for surface patterning of implantable biomaterials suffer from a limited resolution, not allowing controlled generation of sub-cellular three-dimensional features. Here, a direct laser lithography technique based on two-photon absorption was used to construct several patterns varying in size between 500 nm and 15 μm. Through replication via an intermediate mold, the patterns were transferred into polylactic acid (PLA), a widely used biomedical polymer, while retaining the original geometry. An osteoblast-like cell line, MG-63 was used for characterizing the morphological response to the topographical patterns. The results indicated that semi-continuous (dashed) lines, with a height of 1 μm were able to induce cell elongation in the direction of the lines. However, when dashes with a height of 0.5 μm were combined with perpendicularly crossing continuous lines (rails) with a height of 8 μm, the contact guidance effect of the dashes was lost and elongation of the cells was observed in the direction of the larger features. A second pattern, consisting of different arrays of pillars showed that, depending on the pillar height, the cells were either able to spread over the pattern or were confined between the pattern features. These differences in the ability of cells to spread further resulted in the formation of tension forces through stress fibers and displacement of vimentin. The method for high-resolution micropatterning of PLA as presented here can also be applied to other biomedical polymers, making it useful both for fundamental studies and for designing new biomaterials with improved functionality.
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Affiliation(s)
- David Barata
- Department of Tissue Regeneration, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, Overijssel, Netherlands. Department of Instructive Biomaterials Engineering, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, Limburg, Netherlands
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31
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Padeta I, Nugroho WS, Kusindarta DL, Fibrianto YH, Budipitojo T. Mesenchymal Stem Cell-conditioned Medium Promote the
Recovery of Skin Burn Wound. ACTA ACUST UNITED AC 2017. [DOI: 10.3923/ajava.2017.132.141] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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32
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Elli FM, Boldrin V, Pirelli A, Spada A, Mantovani G. The Complex GNAS Imprinted Locus and Mesenchymal Stem Cells Differentiation. Horm Metab Res 2017; 49:250-258. [PMID: 27756094 DOI: 10.1055/s-0042-115305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
All tissues and organs derive from stem cells, which are undifferentiated cells able to differentiate into specialized cells and self-renewal. In mammals, there are embryonic stem cells that generate germ layers, and adult stem cells, which act as a repair system for the body and maintain the normal turnover of regenerative organs. Mesenchymal stem cells (MSCs) are nonhematopoietic adult multipotent cells, which reside in virtually all postnatal organs and tissues, and, under appropriate in vitro conditions, are capable to differentiate into osteogenic, adipogenic, chondrogenic, myogenic, and neurogenic lineages. Their commitment and differentiation depend on several interacting signaling pathways and transcription factors. Most GNAS-based disorders have the common feature of episodic de novo formation of islands of extraskeletal, qualitatively normal, bone in skin and subcutaneous fat. The tissue distribution of these lesions suggests that pathogenesis involves abnormal differentiation of MSCs and/or more committed precursor cells that are present in subcutaneous tissues. Data coming from transgenic mice support the concept that GNAS is a key factor in the regulation of lineage switching between osteoblast and adipocyte fates, and that its role may be to prevent bone formation in tissues where bone should not form. Despite the growing knowledge about the process of heterotopic ossification in rare genetic disorders, the pathophysiological mechanisms by which alterations of cAMP signaling lead to ectopic bone formation in the context of mesenchymal tissues is not fully understood.
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Affiliation(s)
- F M Elli
- Department of Clinical Sciences and Community Health, Endocrinology and Diabetology Unit, University of Milan, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - V Boldrin
- Department of Clinical Sciences and Community Health, Endocrinology and Diabetology Unit, University of Milan, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - A Pirelli
- Department of Clinical Sciences and Community Health, Endocrinology and Diabetology Unit, University of Milan, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - A Spada
- Department of Clinical Sciences and Community Health, Endocrinology and Diabetology Unit, University of Milan, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - G Mantovani
- Department of Clinical Sciences and Community Health, Endocrinology and Diabetology Unit, University of Milan, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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Samiei M, Aghazadeh M, Alizadeh E, Aslaminabadi N, Davaran S, Shirazi S, Ashrafi F, Salehi R. Osteogenic/Odontogenic Bioengineering with co-Administration of Simvastatin and Hydroxyapatite on Poly Caprolactone Based Nanofibrous Scaffold. Adv Pharm Bull 2016; 6:353-365. [PMID: 27766219 DOI: 10.15171/apb.2016.047] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 06/15/2016] [Accepted: 06/18/2016] [Indexed: 12/21/2022] Open
Abstract
Purpose: Statin is an effective factor for promoting osteogenesis. The aim of the present study was to evaluate the effect of simvastatin (SIM) and/or HA addition on changes in osteogenesis levels by human DPSCs transferred onto three-dimensional (3D) nanofibrous Poly (ε-caprolactone) (PCL)/Poly lactic acide (PLLA) polymeric scaffolds. Methods: For this purpose, a 3D nanofibrous composite scaffold of PCL/PLLA/HA was prepared by electrospinning method. SIM was added to scaffolds during DPSCs culturing step. Cell proliferation and osteogenic activity levels were assessed by using MTT assay and Alizarin Red assay methods. In addition, the expression of genes responsible for osteogenesis, including BMP2, Osteocalcin, DSPP and RUNX2, were determined before and 2 weeks after incorporation of SIM. Results: The MTT assay showed that PCL/PLLA/HA scaffolds seeded with DPSCs has significant (p<0.05) more proliferative effect than PCL/PLLA or DMEM cultured cells, additionally SIM administration improved this result over the PCL/PLLA/HA scaffolds without SIM treatment. SEM imaging revealed improved adhesion and probably osteogenic differentiation of DPSCs on PCL/PLLA/HA nanofibers treated with SIM, moreover the alizarin red assay ensured significant (p<0.05) higher mineralization of this group. Finally, real time PCR confirmed the positive regulation (P<0.05) of the expression of osteo/odontogenesis markers BMP2, Osteocalcin, DSPP and RUNX2 genes in PLLA-PCL-HA (0.1)-SIM group. Conclusion: As a result, addition of simvastatin with incorporation of hydroxyapatite in PCL-PLLA scaffolds might increase the expression of osteogenesis markers in the DPSCs, with a possible increase in cell differentiation and bone formation.
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Affiliation(s)
- Mohammad Samiei
- Endodontics Department of Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.; Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marziyeh Aghazadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.; Oral Medicine Department of Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Effat Alizadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.; School of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naser Aslaminabadi
- Pediatric Dentistry Department of Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Soodabeh Davaran
- School of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran.; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sajjad Shirazi
- Dental and Periodontal Research Center of Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Farhad Ashrafi
- Endodontics Department of Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Roya Salehi
- School of Advanced Medical Science, Tabriz University of Medical Sciences, Tabriz, Iran.; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.; Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Ataman MG, Uysal CA, Ertas NM, Bayraktar N, Terzi A, Borman H. The effect of adipose stromal vascular fraction on transverse rectus abdominis musculocutaneous flap: an experimental study. J Plast Surg Hand Surg 2016; 50:272-80. [PMID: 27010192 DOI: 10.3109/2000656x.2016.1159217] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Transverse rectus abdominis musculocutaneous (TRAM) flap is one of the options in reconstruction after breast cancer surgery for breast reconstruction. Tissue necrosis often occurs in the third and fourth perfusion zones of the flap. A study was planned to find out the effects of adipose stromal vascular fraction (SVF) cells on viability of TRAM flap and the experimental model was designed to be applicable in clinical practice. METHODS Right inferior epigastric artery pedicled, 5 × 2.5 cm sized TRAM flap was used as a flap model in 30 rats in three groups (group 1: sham; group 2: phosphate-buffered saline (PBS); group 3: SVF cell injected). The viability of the flaps were assessed on the postoperative 7th day with photographs and software for the calculations. RESULTS The mean viable flap percentage to total flap area was recorded as 51.8% ± 11.19, 49.5% ± 10.30, 82.3% ± 9.56, in group 1, group 2, and group 3, respectively (p < 0.05). The mean capillary density was noted as 5.15 ± 0.56, 4.37 ± 0.58, and 12.40 ± 1.17 in groups 1, 2, and 3, respectively (p < 0.05). The fibrosis gradient indicated no difference between the groups (p > 0.05). The in-vivo differentiation of SVF cells to endothelial cells was noted. The blood VEGF levels showed a marked increase in the experimental group (p < 0.05). CONCLUSION The adipose SVF cells were found out to improve the TRAM flap viability and decrease necrosis, especially in zone 3 and 4.
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Affiliation(s)
- Murat Gorkem Ataman
- a Department of Plastic, Reconstructive Surgery , Baskent University Faculty of Medicine , Ankara , Turkey
| | - Cagri A Uysal
- a Department of Plastic, Reconstructive Surgery , Baskent University Faculty of Medicine , Ankara , Turkey
| | - Nilgun Markal Ertas
- a Department of Plastic, Reconstructive Surgery , Baskent University Faculty of Medicine , Ankara , Turkey
| | - Nilufer Bayraktar
- b Department of Biochemistry , Baskent University Faculty of Medicine , Ankara , Turkey
| | - Aysen Terzi
- c Department of Pathology , Baskent University Faculty of Medicine , Ankara , Turkey
| | - Huseyin Borman
- a Department of Plastic, Reconstructive Surgery , Baskent University Faculty of Medicine , Ankara , Turkey
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Cara-Fuentes M, Machuca-Ariza J, Ruiz-Martos A, Ramos-Robles MC, Martínez-Lara I. Long-term outcome of dental implants after maxillary augmentation with and without bone grafting. Med Oral Patol Oral Cir Bucal 2016; 21:e229-35. [PMID: 26827071 PMCID: PMC4788804 DOI: 10.4317/medoral.21055] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 11/14/2015] [Indexed: 11/25/2022] Open
Abstract
Background This study aims to evaluate the technique of sinus bone reformation, which consists of elevating the sinus membrane and placement the implant without bone graft, compared with the widely-used technique involving raising the maxillary sinus and grafting, using animal hydroxyapatite as the filler, while simultaneously fixing the implants. Material and Methods This is a retrospective study on two groups of patients who underwent elevation of the sinus membrane and simultaneous placement of the implant. The grafting technique was applied to one group, while the other had no graft. An alveolar ridge height of 4 to 7 mm was necessary. Radiological control was undertaken at 6 months and one year post-prosthetic loading. In each group 38 implants were placed. Results No significant behavioural differences were observed in the implants according to the Albrektsson success criteria. Implant failure was observed in 2 implants from the bone grafting group (success rate 93%) and in 1 implant from the reformation group (success rate 97%). In this group, bone formation was observed on both sides of each implant, the bone gain was measured using image management software (2.7±0.9mm mesial and 2.6±0.9mm distal). There was no correlation between mesial and distal bone gain and implant´s length. Conclusions The results indicate that bone reformation is a valid technique in cases involving atrophy of the posterior maxilla. Primary stability, maintenance of space by the implant, and the formation of a blood clot are crucial in this technique in order to achieve bone formation around the implant. It is an alternative to the conventional technique of sinus lift with filling material, and has several advantages over this procedure, including a lower infection risk, as it does not involve a biomaterial, reduced cost, a simpler technique, and better acceptance by the patient. Key words:Bone formation, sinus membrane elevation, maxillary sinus, bone grafting.
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Chua ILS, Kim HW, Lee JH. Signaling of extracellular matrices for tissue regeneration and therapeutics. Tissue Eng Regen Med 2016; 13:1-12. [PMID: 30603379 DOI: 10.1007/s13770-016-9075-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/18/2015] [Accepted: 11/02/2015] [Indexed: 12/17/2022] Open
Abstract
Cells receive important regulatory signals from their extracellular matrix (ECM) and the physical property of the ECM regulates important cellular behaviors like cell proliferation, migration and differentiation. A large part of tissue formation and regeneration depends on cellular interaction with its ECM. A comprehensive understanding of the mechanistic biochemical pathway of the ECM components is necessary for the design of a biomaterial scaffold for tissue engineering. Depending on the type of tissue, the ECM requirement might be different and this would influence its downstream intracellular cell signaling. Here, we reviewed the ECM and its signaling pathway by discussing: 1) classification of the ECM into hard, elastic and soft tissue based on its physical properties, 2) proliferation and differentiation control of the ECM, 3) roles of membrane receptor and its intracellular regulation factor, 4) ECM remodeling via inside-out signaling. By providing a comprehensive overview of the ECM's role in mechanotransduction and the self-regulatory effect of cells back on the ECM, we hope to provide a better insight of the physical and biochemical cues from the ECM. A sound understanding on the in vivo ECM has implication on the choice of materials and surface coating of biomimetic scaffolds used for tissue regeneration and therapeutics in a cell-free scaffold.
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Affiliation(s)
- Ing Loon Sean Chua
- 1Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore City, Singapore
| | - Hae-Won Kim
- 2Department of Nanobiomedical Sciences and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Korea.,3Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, Korea.,4Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, Korea
| | - Jae Ho Lee
- 1Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore City, Singapore.,2Department of Nanobiomedical Sciences and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Korea.,3Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, Korea
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Abstract
Biomaterials have played an increasingly prominent role in the success of biomedical devices and in the development of tissue engineering, which seeks to unlock the regenerative potential innate to human tissues/organs in a state of deterioration and to restore or reestablish normal bodily function. Advances in our understanding of regenerative biomaterials and their roles in new tissue formation can potentially open a new frontier in the fast-growing field of regenerative medicine. Taking inspiration from the role and multi-component construction of native extracellular matrices (ECMs) for cell accommodation, the synthetic biomaterials produced today routinely incorporate biologically active components to define an artificial in vivo milieu with complex and dynamic interactions that foster and regulate stem cells, similar to the events occurring in a natural cellular microenvironment. The range and degree of biomaterial sophistication have also dramatically increased as more knowledge has accumulated through materials science, matrix biology and tissue engineering. However, achieving clinical translation and commercial success requires regenerative biomaterials to be not only efficacious and safe but also cost-effective and convenient for use and production. Utilizing biomaterials of human origin as building blocks for therapeutic purposes has provided a facilitated approach that closely mimics the critical aspects of natural tissue with regard to its physical and chemical properties for the orchestration of wound healing and tissue regeneration. In addition to directly using tissue transfers and transplants for repair, new applications of human-derived biomaterials are now focusing on the use of naturally occurring biomacromolecules, decellularized ECM scaffolds and autologous preparations rich in growth factors/non-expanded stem cells to either target acceleration/magnification of the body's own repair capacity or use nature's paradigms to create new tissues for restoration. In particular, there is increasing interest in separating ECMs into simplified functional domains and/or biopolymeric assemblies so that these components/constituents can be discretely exploited and manipulated for the production of bioscaffolds and new biomimetic biomaterials. Here, following an overview of tissue auto-/allo-transplantation, we discuss the recent trends and advances as well as the challenges and future directions in the evolution and application of human-derived biomaterials for reconstructive surgery and tissue engineering. In particular, we focus on an exploration of the structural, mechanical, biochemical and biological information present in native human tissue for bioengineering applications and to provide inspiration for the design of future biomaterials.
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Boateng J, Catanzano O. Advanced Therapeutic Dressings for Effective Wound Healing--A Review. J Pharm Sci 2015; 104:3653-3680. [PMID: 26308473 DOI: 10.1002/jps.24610] [Citation(s) in RCA: 487] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/20/2015] [Accepted: 07/21/2015] [Indexed: 12/15/2022]
Abstract
Advanced therapeutic dressings that take active part in wound healing to achieve rapid and complete healing of chronic wounds is of current research interest. There is a desire for novel strategies to achieve expeditious wound healing because of the enormous financial burden worldwide. This paper reviews the current state of wound healing and wound management products, with emphasis on the demand for more advanced forms of wound therapy and some of the current challenges and driving forces behind this demand. The paper reviews information mainly from peer-reviewed literature and other publicly available sources such as the US FDA. A major focus is the treatment of chronic wounds including amputations, diabetic and leg ulcers, pressure sores, and surgical and traumatic wounds (e.g., accidents and burns) where patient immunity is low and the risk of infections and complications are high. The main dressings include medicated moist dressings, tissue-engineered substitutes, biomaterials-based biological dressings, biological and naturally derived dressings, medicated sutures, and various combinations of the above classes. Finally, the review briefly discusses possible prospects of advanced wound healing including some of the emerging physical approaches such as hyperbaric oxygen, negative pressure wound therapy and laser wound healing, in routine clinical care.
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Affiliation(s)
- Joshua Boateng
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK.
| | - Ovidio Catanzano
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK
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Pelizzo G, Avanzini MA, Icaro Cornaglia A, Osti M, Romano P, Avolio L, Maccario R, Dominici M, De Silvestri A, Andreatta E, Costanzo F, Mantelli M, Ingo D, Piccinno S, Calcaterra V. Mesenchymal stromal cells for cutaneous wound healing in a rabbit model: pre-clinical study applicable in the pediatric surgical setting. J Transl Med 2015; 13:219. [PMID: 26152232 PMCID: PMC4495634 DOI: 10.1186/s12967-015-0580-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 06/24/2015] [Indexed: 12/13/2022] Open
Abstract
Objective Mesenchymal stromal cells
(MSCs) expanded in vitro have been proposed as a potential therapy for congenital or acquired skin defects in pediatrics. The aim of this pre-clinical study was to investigate the effects of intradermal injections of MSC in experimental cutaneous wound repair comparing allogeneic and autologous adipose stem cells (ASCs) and autologous bone marrow-mesenchymal stromal cells (BM-MSCs). Methods Mesenchymal stromal cells were in vitro expanded from adipose and BM tissues of young female New Zealand rabbits. MSCs were characterized for plastic adhesion, surface markers, proliferation and differentiation capacity. When an adequate number of cells (ASCs 10 × 106 and BM-MSCs 3 × 106, because of their low rate of proliferation) was reached, two skin wounds were surgically induced in each animal. The first was topically treated with cell infusions, the second was used as a control. The intradermal inoculation included autologous or allogeneic ASCs or autologous BM-MSCs. For histological examination, animals were sacrificed and wounds were harvested after 11 and 21 days of treatment. Results Rabbit ASCs were isolated and expanded in vitro with relative abundance, cells expressed typical surface markers (CD49e, CD90 and CD29). Topically, ASC inoculation provided more rapid wound healing than BM-MSCs and controls. Improved re-epithelization, reduced inflammatory infiltration and increased collagen deposition were observed in biopsies from wounds treated with ASCs, with the best result in the autologous setting. ASCs also improved restoration of skin architecture during wound healing. Conclusion The use of ASCs may offer a promising solution to treat extended wounds. Pre-clinical studies are however necessary to validate the best skin regeneration technique, which could be used in pediatric surgical translational research.
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Affiliation(s)
- Gloria Pelizzo
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Maria Antonietta Avanzini
- Immunology and Transplantation Laboratory/Cell Factory/Pediatric Hematology/Oncology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Antonia Icaro Cornaglia
- Histology and Embryology Unit, Department of Public Health, Experimental Medicine and Forensic, University of Pavia, Pavia, Italy.
| | - Monica Osti
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Piero Romano
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Luigi Avolio
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Rita Maccario
- Immunology and Transplantation Laboratory/Cell Factory/Pediatric Hematology/Oncology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Massimo Dominici
- Laboratory of Cellular Therapies, Department of Medical and Surgical Sciences for Children and Adults, University Hospital of Modena and Reggio, Emilia, Italy.
| | - Annalisa De Silvestri
- Biometry and Clinical Epidemiology Unit, Scientific Direction, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Erika Andreatta
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Federico Costanzo
- Pediatric Surgery Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, 27100, Pavia, Italy.
| | - Melissa Mantelli
- Immunology and Transplantation Laboratory/Cell Factory/Pediatric Hematology/Oncology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Daniela Ingo
- Immunology and Transplantation Laboratory/Cell Factory/Pediatric Hematology/Oncology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.
| | - Serena Piccinno
- Laboratory of Cellular Therapies, Department of Medical and Surgical Sciences for Children and Adults, University Hospital of Modena and Reggio, Emilia, Italy.
| | - Valeria Calcaterra
- Pediatric Unit, Fondazione IRCCS Policlinico San Matteo and University of Pavia, Pavia, Italy.
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Kaul H, Ventikos Y. On the genealogy of tissue engineering and regenerative medicine. TISSUE ENGINEERING. PART B, REVIEWS 2015; 21:203-17. [PMID: 25343302 PMCID: PMC4390213 DOI: 10.1089/ten.teb.2014.0285] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In this article, we identify and discuss a timeline of historical events and scientific breakthroughs that shaped the principles of tissue engineering and regenerative medicine (TERM). We explore the origins of TERM concepts in myths, their application in the ancient era, their resurgence during Enlightenment, and, finally, their systematic codification into an emerging scientific and technological framework in recent past. The development of computational/mathematical approaches in TERM is also briefly discussed.
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Affiliation(s)
- Himanshu Kaul
- Department of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford, United Kingdom
| | - Yiannis Ventikos
- Department of Mechanical Engineering, University College London, London, United Kingdom
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Kanherkar RR, Bhatia-Dey N, Makarev E, Csoka AB. Cellular reprogramming for understanding and treating human disease. Front Cell Dev Biol 2014; 2:67. [PMID: 25429365 PMCID: PMC4228919 DOI: 10.3389/fcell.2014.00067] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 10/27/2014] [Indexed: 12/15/2022] Open
Abstract
In the last two decades we have witnessed a paradigm shift in our understanding of cells so radical that it has rewritten the rules of biology. The study of cellular reprogramming has gone from little more than a hypothesis, to applied bioengineering, with the creation of a variety of important cell types. By way of metaphor, we can compare the discovery of reprogramming with the archeological discovery of the Rosetta stone. This stone slab made possible the initial decipherment of Egyptian hieroglyphics because it allowed us to see this language in a way that was previously impossible. We propose that cellular reprogramming will have an equally profound impact on understanding and curing human disease, because it allows us to perceive and study molecular biological processes such as differentiation, epigenetics, and chromatin in ways that were likewise previously impossible. Stem cells could be called “cellular Rosetta stones” because they allow also us to perceive the connections between development, disease, cancer, aging, and regeneration in novel ways. Here we present a comprehensive historical review of stem cells and cellular reprogramming, and illustrate the developing synergy between many previously unconnected fields. We show how stem cells can be used to create in vitro models of human disease and provide examples of how reprogramming is being used to study and treat such diverse diseases as cancer, aging, and accelerated aging syndromes, infectious diseases such as AIDS, and epigenetic diseases such as polycystic ovary syndrome. While the technology of reprogramming is being developed and refined there have also been significant ongoing developments in other complementary technologies such as gene editing, progenitor cell production, and tissue engineering. These technologies are the foundations of what is becoming a fully-functional field of regenerative medicine and are converging to a point that will allow us to treat almost any disease.
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Affiliation(s)
- Riya R Kanherkar
- Epigenetics Laboratory, Department of Anatomy, Howard University Washington, DC, USA
| | - Naina Bhatia-Dey
- Epigenetics Laboratory, Department of Anatomy, Howard University Washington, DC, USA
| | - Evgeny Makarev
- InSilico Medicine, Emerging Technology Center, Johns Hopkins University Eastern Baltimore, MD, USA
| | - Antonei B Csoka
- Epigenetics Laboratory, Department of Anatomy, Howard University Washington, DC, USA
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Székely T, Burrage K, Mangel M, Bonsall MB. Stochastic dynamics of interacting haematopoietic stem cell niche lineages. PLoS Comput Biol 2014; 10:e1003794. [PMID: 25188267 PMCID: PMC4154659 DOI: 10.1371/journal.pcbi.1003794] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 07/04/2014] [Indexed: 01/02/2023] Open
Abstract
Since we still know very little about stem cells in their natural environment, it is useful to explore their dynamics through modelling and simulation, as well as experimentally. Most models of stem cell systems are based on deterministic differential equations that ignore the natural heterogeneity of stem cell populations. This is not appropriate at the level of individual cells and niches, when randomness is more likely to affect dynamics. In this paper, we introduce a fast stochastic method for simulating a metapopulation of stem cell niche lineages, that is, many sub-populations that together form a heterogeneous metapopulation, over time. By selecting the common limiting timestep, our method ensures that the entire metapopulation is simulated synchronously. This is important, as it allows us to introduce interactions between separate niche lineages, which would otherwise be impossible. We expand our method to enable the coupling of many lineages into niche groups, where differentiated cells are pooled within each niche group. Using this method, we explore the dynamics of the haematopoietic system from a demand control system perspective. We find that coupling together niche lineages allows the organism to regulate blood cell numbers as closely as possible to the homeostatic optimum. Furthermore, coupled lineages respond better than uncoupled ones to random perturbations, here the loss of some myeloid cells. This could imply that it is advantageous for an organism to connect together its niche lineages into groups. Our results suggest that a potential fruitful empirical direction will be to understand how stem cell descendants communicate with the niche and how cancer may arise as a result of a failure of such communication. Stem cells portend great potential for advances in medicine. However, these advances require detailed understanding of the dynamics of stem cells. In vitro studies are now routine and challenge our preconceptions about stem cell biology, but the dynamics of stem cells in vivo remain poorly understood. Thus, there is a real need for novel computational frameworks for general understanding and predictions about experiments on stem cells in their native environments. By implementing a stochastic model of stem cell dynamics, generically based on the bone marrow system, in a novel, fast and computationally efficient way, we show how different couplings of stem cell niche lineages lead to different predictions about homeostatic control. Understanding the demand control of stem cell systems is essential to both predicting in vivo stem cell dynamics and also how its breakdown may lead to the development of cancers of the blood system.
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Affiliation(s)
- Tamás Székely
- Department of Computer Science, University of Oxford, Oxford, United Kingdom
- * E-mail:
| | - Kevin Burrage
- Department of Computer Science, University of Oxford, Oxford, United Kingdom
- Department of Mathematics, Queensland University of Technology, Brisbane, Queensland, Australia
| | - Marc Mangel
- Department of Applied Mathematics and Statistics, University of California Santa Cruz, Santa Cruz, California, United States of America
- Department of Biology, University of Bergen, Bergen, Norway
| | - Michael B. Bonsall
- Mathematical Ecology Research Group, Department of Zoology, University of Oxford, Oxford, United Kingdom
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Uysal CA, Tobita M, Hyakusoku H, Mizuno H. The Effect of Bone-Marrow-Derived Stem Cells and Adipose-Derived Stem Cells on Wound Contraction and Epithelization. Adv Wound Care (New Rochelle) 2014; 3:405-413. [PMID: 24940554 DOI: 10.1089/wound.2014.0539] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 03/26/2014] [Indexed: 01/08/2023] Open
Abstract
Objective: The relationship between the wound contraction and levels of α-smooth muscle actin (α-SMA) has been revealed in different studies. We aimed to investigate the effects of mesenchymal stem cells (MSCs), mainly bone-marrow-derived stem cells (BSCs) and adipose-derived stem cells (ASCs), and find out the α-SMA, fibroblast growth factor (FGF), transforming growth factor beta, and vascular endothelial growth factor (VEGF) levels on an in vivo acute wound healing model after the application of MSCs. Approach: Four circular skin defects were formed on the dorsum of Fisher rats (n=20). The defects were applied phosphate-buffered saline (PBS), ASCs, BSCs, and patchy skin graft, respectively. The healing time and scar area were noted. Results: There was a statistical decrease in the healing time in ASC, BSC, and skin graft groups (p<0.05). However, the scar was smaller in the PBS group (p<0.05). The α-SMA levels were statistically lower in ASC, BSC, and graft groups (p<0.05). The FGF levels were statistically higher in ASC and BSC groups (p<0.05). The differentiation of the injected MSCs to endothelial cells and keratinocytes was observed. Innovation and Conclusion: MSCs decrease the healing time and contraction of the wound while increasing the epithelization rate by increasing angiogenesis.
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Affiliation(s)
- Cagri A. Uysal
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Baskent University, Ankara, Turkey
| | - Morikuni Tobita
- Department of Plastic and Reconstructive Surgery, Juntendo University, Tokyo, Japan
| | - Hiko Hyakusoku
- Department of Plastic and Reconstructive Surgery, Nippon Medical School, Tokyo, Japan
| | - Hiroshi Mizuno
- Department of Plastic and Reconstructive Surgery, Juntendo University, Tokyo, Japan
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Braden BP, Taketa DA, Pierce JD, Kassmer S, Lewis DD, De Tomaso AW. Vascular regeneration in a basal chordate is due to the presence of immobile, bi-functional cells. PLoS One 2014; 9:e95460. [PMID: 24736432 PMCID: PMC3988187 DOI: 10.1371/journal.pone.0095460] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 03/27/2014] [Indexed: 11/18/2022] Open
Abstract
The source of tissue turnover during homeostasis or following injury is usually due to proliferation of a small number of resident, lineage-restricted stem cells that have the ability to amplify and differentiate into mature cell types. We are studying vascular regeneration in a chordate model organism, Botryllus schlosseri, and have previously found that following surgical ablation of the extracorporeal vasculature, new tissue will regenerate in a VEGF-dependent process within 48 hrs. Here we use a novel vascular cell lineage tracing methodology to assess regeneration in parabiosed individuals and demonstrate that the source of regenerated vasculature is due to the proliferation of pre-existing vascular resident cells and not a mobile progenitor. We also show that these cells are bi-potential, and can reversibly adopt two fates, that of the newly forming vessels or the differentiated vascular tissue at the terminus of the vasculature, known as ampullae. In addition, we show that pre-existing vascular resident cells differentially express progenitor and differentiated cell markers including the Botryllus homologs of CD133, VEGFR-2, and Cadherin during the regenerative process.
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Affiliation(s)
- Brian P. Braden
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Daryl A. Taketa
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - James D. Pierce
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Susannah Kassmer
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Daniel D. Lewis
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
| | - Anthony W. De Tomaso
- Department of Molecular, Cellular, Developmental Biology, University of California Santa Barbara, Santa Barbara, California, United States of America
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Morino K, Tanaka G, Aihara K. Efficient recovery of dynamic behavior in coupled oscillator networks. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:032909. [PMID: 24125327 DOI: 10.1103/physreve.88.032909] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 06/10/2013] [Indexed: 06/02/2023]
Abstract
We study an effective method to recover dynamic activity in coupled oscillator networks that have been damaged and lost oscillatory dynamics owing to some inactivated or deteriorated oscillator elements. Recovery of the dynamic behavior can be achieved by newly connecting intact oscillators to the network. We analytically and numerically examine the proportion of the oscillators that are needed to be supported by intact oscillators for recovery of oscillation dynamics. Our results show that it can be more effective to preferentially support active oscillators in the damaged network than to preferentially support inactivated ones. The conditions for this counterintuitive result are discussed. Our framework could be a theoretical foundation for understanding regeneration of oscillatory dynamics in physical and biological systems.
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Affiliation(s)
- Kai Morino
- Graduate School of Information Science and Technology, The University of Tokyo, Tokyo 113-8656, Japan
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Ullah M, Eucker J, Sittinger M, Ringe J. Mesenchymal stem cells and their chondrogenic differentiated and dedifferentiated progeny express chemokine receptor CCR9 and chemotactically migrate toward CCL25 or serum. Stem Cell Res Ther 2013; 4:99. [PMID: 23958031 PMCID: PMC3854782 DOI: 10.1186/scrt310] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 08/12/2013] [Indexed: 12/16/2022] Open
Abstract
Introduction Guided migration of chondrogenically differentiated cells has not been well studied, even though it may be critical for growth, repair, and regenerative processes. The chemokine CCL25 is believed to play a critical role in the directional migration of leukocytes and stem cells. To investigate the motility effect of serum- or CCL25-mediated chemotaxis on chondrogenically differentiated cells, mesenchymal stem cells (MSCs) were induced to chondrogenic lineage cells. Methods MSC-derived chondrogenically differentiated cells were characterized for morphology, histology, immunohistochemistry, quantitative polymerase chain reaction (qPCR), surface profile, and serum- or CCL25-mediated cell migration. Additionally, the chemokine receptor, CCR9, was examined in different states of MSCs. Results The chondrogenic differentiated state of MSCs was positive for collagen type II and Alcian blue staining, and showed significantly upregulated expression of COL2A1and SOX9, and downregulated expression of CD44, CD73, CD90, CD105 and CD166, in contrast to the undifferentiated and dedifferentiated states of MSCs. For the chondrogenic differentiated, undifferentiated, and dedifferentiated states of MSCs, the serum-mediated chemotaxis was in a percentage ratio of 33%:84%:85%, and CCL25-mediated chemotaxis was in percentage ratio of 12%:14%:13%, respectively. On the protein level, CCR9, receptor of CCL25, was expressed in the form of extracellular and intracellular domains. On the gene level, qPCR confirmed the expression of CCR9 in different states of MSCs. Conclusions CCL25 is an effective cue to guide migration in a directional way. In CCL25-mediated chemotaxis, the cell-migration rate was almost the same for different states of MSCs. In serum-mediated chemotaxis, the cell-migration rate of chondrogenically differentiated cells was significantly lower than that in undifferentiated or dedifferentiated cells. Current knowledge of the surface CD profile and cell migration could be beneficial for regenerative cellular therapies.
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Webber MJ, Berns EJ, Stupp SI. Supramolecular Nanofibers of Peptide Amphiphiles for Medicine. Isr J Chem 2013; 53:530-554. [PMID: 24532851 PMCID: PMC3922220 DOI: 10.1002/ijch.201300046] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Peptide nanostructures are an exciting class of supramolecular systems that can be designed for novel therapies with great potential in advanced medicine. This paper reviews progress on nanostructures based on peptide amphiphiles capable of forming one-dimensional assemblies that emulate in structure the nanofibers present in extracellular matrices. These systems are highly tunable using supramolecular chemistry, and can be designed to signal cells directly with bioactive peptides. Peptide amphiphile nanofibers can also be used to multiplex functions through co-assembly and designed to deliver proteins, nucleic acids, drugs, or cells. We illustrate here the functionality of these systems describing their use in regenerative medicine of bone, cartilage, the nervous system, the cardiovascular system, and other tissues. In addition, we highlight recent work on the use of peptide amphiphile assemblies to create hierarchical biomimetic structures with order beyond the nanoscale, and also discuss the future prospects of these supramolecular systems.
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Affiliation(s)
- Matthew J. Webber
- Northwestern University Department of Biomedical Engineering, Evanston, Illinois, 60208 USA
- Institute for Bionanotechnology in Medicine, Northwestern University Chicago, Illinois, 60611 USA
| | - Eric J. Berns
- Northwestern University Department of Biomedical Engineering, Evanston, Illinois, 60208 USA
- Institute for Bionanotechnology in Medicine, Northwestern University Chicago, Illinois, 60611 USA
| | - Samuel I. Stupp
- Institute for Bionanotechnology in Medicine, Northwestern University Chicago, Illinois, 60611 USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois, 60208 USA
- Department of Chemistry, Northwestern University, Evanston, Illinois, 60208 USA
- Department of Medicine, Northwestern University, Chicago, Illinois, 60611 USA
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Factors influencing the deposition of hydroxyapatite coating onto hollow glass microspheres. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:2744-51. [DOI: 10.1016/j.msec.2013.02.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 01/15/2013] [Accepted: 02/20/2013] [Indexed: 01/24/2023]
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An epigenetic component of hematopoietic stem cell aging amenable to reprogramming into a young state. Blood 2013; 121:4257-64. [PMID: 23476050 DOI: 10.1182/blood-2012-11-469080] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aging of hematopoietic stem cells (HSCs) leads to several functional changes, including alterations affecting self-renewal and differentiation. Although it is well established that many of the age-induced changes are intrinsic to HSCs, less is known regarding the stability of this state. Here, we entertained the hypothesis that HSC aging is driven by the acquisition of permanent genetic mutations. To examine this issue at a functional level in vivo, we applied induced pluripotent stem (iPS) cell reprogramming of aged hematopoietic progenitors and allowed the resulting aged-derived iPS cells to reform hematopoiesis via blastocyst complementation. Next, we functionally characterized iPS-derived HSCs in primary chimeras and after the transplantation of re-differentiated HSCs into new hosts, the gold standard to assess HSC function. Our data demonstrate remarkably similar functional properties of iPS-derived and endogenous blastocyst-derived HSCs, despite the extensive chronological and proliferative age of the former. Our results, therefore, favor a model in which an underlying, but reversible, epigenetic component is a hallmark of HSC aging.
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