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Esmaeili J, Barati A, Charelli LE. Discussing the final size and shape of the reconstructed tissues in tissue engineering. J Artif Organs 2022:10.1007/s10047-022-01360-1. [PMID: 36125581 DOI: 10.1007/s10047-022-01360-1] [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: 04/05/2022] [Accepted: 08/15/2022] [Indexed: 11/30/2022]
Abstract
Tissue engineering (TE) has made a revolution in repairing, replacing, or regenerating tissues or organs, but it has still a long way ahead. The mechanical properties along with suitable physicochemical and biological characteristics are the initial criteria for scaffolds in TE that should be fulfilled. This research will provide another point of view toward TE challenges concerning the morphological and geometrical aspects of the reconstructed tissue and which parameters may affect it. Based on our survey, there is a high possibility that the final reconstructed tissue may be different in size and shape compared to the original design scaffold. Thereby, the 3D-printed scaffold might not guarantee an accurate tissue reconstruction. The main justification for this is the unpredicted behavior of cells, specifically in the outer layer of the scaffold. It can also be a concern when the scaffold is implanted while cell migration cannot be controlled through the in vivo signaling pathways, which might cause cancer challenges. To sum up, it is concluded that more studies are necessary to focus on the size and geometry of the final reconstructed tissue.
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Affiliation(s)
- Javad Esmaeili
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, 38156-88349, Iran.,Tissue Engineering Department, TISSUEHUB Co., Tehran, Iran
| | - Aboulfazl Barati
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, 38156-88349, Iran.
| | - Letícia Emiliano Charelli
- Nanotechnology Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering, COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
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2
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Ma Y, Zhou X. Spatially informed cell-type deconvolution for spatial transcriptomics. Nat Biotechnol 2022; 40:1349-1359. [PMID: 35501392 PMCID: PMC9464662 DOI: 10.1038/s41587-022-01273-7] [Citation(s) in RCA: 121] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 03/07/2022] [Indexed: 12/16/2022]
Abstract
Many spatially resolved transcriptomic technologies do not have single-cell resolution but measure the average gene expression for each spot from a mixture of cells of potentially heterogeneous cell types. Here, we introduce a deconvolution method, conditional autoregressive-based deconvolution (CARD), that combines cell-type-specific expression information from single-cell RNA sequencing (scRNA-seq) with correlation in cell-type composition across tissue locations. Modeling spatial correlation allows us to borrow the cell-type composition information across locations, improving accuracy of deconvolution even with a mismatched scRNA-seq reference. CARD can also impute cell-type compositions and gene expression levels at unmeasured tissue locations to enable the construction of a refined spatial tissue map with a resolution arbitrarily higher than that measured in the original study and can perform deconvolution without an scRNA-seq reference. Applications to four datasets, including a pancreatic cancer dataset, identified multiple cell types and molecular markers with distinct spatial localization that define the progression, heterogeneity and compartmentalization of pancreatic cancer.
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Affiliation(s)
- Ying Ma
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA
| | - Xiang Zhou
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA.
- Center for Statistical Genetics, University of Michigan, Ann Arbor, MI, USA.
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Engelbrecht L, Ollewagen T, de Swardt D. Advances in fluorescence microscopy can reveal important new aspects of tissue regeneration. Biochimie 2022; 196:194-202. [DOI: 10.1016/j.biochi.2022.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/19/2022] [Accepted: 02/02/2022] [Indexed: 12/12/2022]
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Puls TJ, Fisher CS, Cox A, Plantenga JM, McBride EL, Anderson JL, Goergen CJ, Bible M, Moller T, Voytik-Harbin SL. Regenerative tissue filler for breast conserving surgery and other soft tissue restoration and reconstruction needs. Sci Rep 2021; 11:2711. [PMID: 33526826 PMCID: PMC7851166 DOI: 10.1038/s41598-021-81771-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 01/05/2021] [Indexed: 12/25/2022] Open
Abstract
Complete removal of cancerous tissue and preservation of breast cosmesis with a single breast conserving surgery (BCS) is essential for surgeons. New and better options would allow them to more consistently achieve this goal and expand the number of women that receive this preferred therapy, while minimizing the need for re-excision and revision procedures or more aggressive surgical approaches (i.e., mastectomy). We have developed and evaluated a regenerative tissue filler that is applied as a liquid to defects during BCS prior to transitioning to a fibrillar collagen scaffold with soft tissue consistency. Using a porcine simulated BCS model, the collagen filler was shown to induce a regenerative healing response, characterized by rapid cellularization, vascularization, and progressive breast tissue neogenesis, including adipose tissue and mammary glands and ducts. Unlike conventional biomaterials, no foreign body response or inflammatory-mediated "active" biodegradation was observed. The collagen filler also did not compromise simulated surgical re-excision, radiography, or ultrasonography procedures, features that are important for clinical translation. When post-BCS radiation was applied, the collagen filler and its associated tissue response were largely similar to non-irradiated conditions; however, as expected, healing was modestly slower. This in situ scaffold-forming collagen is easy to apply, conforms to patient-specific defects, and regenerates complex soft tissues in the absence of inflammation. It has significant translational potential as the first regenerative tissue filler for BCS as well as other soft tissue restoration and reconstruction needs.
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Affiliation(s)
| | - Carla S Fisher
- Division of Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Abigail Cox
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA
| | - Jeannie M Plantenga
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA
| | - Emma L McBride
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Medical Scientist/Engineer Training Program, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Jennifer L Anderson
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Craig J Goergen
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Melissa Bible
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Tracy Moller
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Sherry L Voytik-Harbin
- Weldon School of Biomedical Engineering, College of Engineering, Purdue University, West Lafayette, IN, 47907, USA.
- Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, 47907, USA.
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Sun Y, Song L, Zhang Y, Wang H, Dong X. Adipose stem cells from type 2 diabetic mice exhibit therapeutic potential in wound healing. Stem Cell Res Ther 2020; 11:298. [PMID: 32680569 PMCID: PMC7368682 DOI: 10.1186/s13287-020-01817-1] [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: 02/28/2020] [Revised: 07/04/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022] Open
Abstract
Background Diabetic patients suffer from impaired wound healing. Mesenchymal stem cell (MSC) therapy represents a promising approach toward improving skin wound healing through the release of soluble growth factors and cytokines that stimulate new vessel formation and modulate inflammation. Whether adipose tissue-derived MSCs (ASCs) from type 2 diabetes (T2D) donors are suitable for skin damage repair remains largely unknown. Methods In this study, we compared the phenotype and functionality of ASCs harvested from high-fat diet (HFD) and streptozotocin (STZ)-induced T2D or control mice, and assessed their abilities to promote wound healing in an excisional wound splinting mouse model with T2D. Results T2D ASCs expressed similar cellular markers as control ASCs but secreted less hepatocyte growth factor (HGF), vascular endothelial growth factor (VEGF), and transforming growth factor β (TGF-β). T2D ASCs were somewhat less effective in promoting healing of the wound, as manifested by slightly reduced re-epithelialization, cutaneous appendage regeneration, and collagen III deposition in wound tissues. In vitro, T2D ASCs promoted proliferation and migration of skin fibroblasts to a comparable extent as control ASCs via suppression of inflammation and macrophage infiltration. Conclusions From these findings, we conclude that, although ASCs from T2D mice are marginally inferior to control ASCs, they possess comparable therapeutic effects in wound healing.
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Affiliation(s)
- Yongfa Sun
- College of Life Science, Qingdao Agricultural University, No. 700, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Lili Song
- College of Life Science, Qingdao Agricultural University, No. 700, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Yong Zhang
- College of Life Science, Qingdao Agricultural University, No. 700, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China
| | - Hongjun Wang
- Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Xiao Dong
- College of Life Science, Qingdao Agricultural University, No. 700, Changcheng Road, Chengyang District, Qingdao, 266109, Shandong, People's Republic of China.
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Modulation of Metamorphic and Regenerative Events by Cold Atmospheric Pressure Plasma Exposure in Tadpoles, Xenopus laevis. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9142860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Atmospheric pressure plasma has found wide clinical applications including wound healing, tissue regeneration, sterilization, and cancer treatment. Here, we have investigated its effect on developmental processes like metamorphosis and tail regeneration in tadpoles. Plasma exposure hastens the process of tail regeneration but delays metamorphic development. The observed differences in these two developmental processes following plasma exposure are indicative of physiological costs associated with developmental plasticity for their survival. Ultrastructural changes in epidermis and mitochondria in response to the stress of tail amputation and plasma exposure show characteristics of cellular hypoxia and oxidative stress. Mitochondria show morphological changes such as swelling with wide and fewer cristae and seem to undergo processes such as fission and fusion. Complex interactions between calcium, peroxisomes, mitochondria and their pore transition pathways are responsible for changes in mitochondrial structure and function, suggesting the subcellular site of action of plasma in this system.
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Greaves NS, Iqbal SA, Baguneid M, Bayat A. The role of skin substitutes in the management of chronic cutaneous wounds. Wound Repair Regen 2013; 21:194-210. [PMID: 23437811 DOI: 10.1111/wrr.12029] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 12/25/2012] [Indexed: 12/19/2022]
Abstract
Chronic wounds, including diabetic and venous ulcers, represent disruption of normal healing processes resulting in a pathological state of nonhealing cutaneous inflammation. They place an increasingly significant economic burden on healthcare providers as their prevalence is rising in keeping with an aging population. Current treatment modalities are slow acting and resource intensive. Bioengineered skin substitutes from autogenic, allogenic, or xenogenic sources have emerged as a new and alternative therapeutic option. A range of such products is licensed for clinical use, which differ in terms of structure and cellular content. Placed directly onto a prepared wound bed, skin substitutes may stimulate or accelerate healing by promoting revascularization, cellular migration, and repopulation of wound fields through provision of an appropriate scaffold material to facilitate these processes. Products containing fetal or autologous cells also benefit from early release of bioactive molecules including growth factors and cytokines. To date, limited numbers of randomized controlled trials studying skin substitutes have been published but evidence from case series and case-control studies is encouraging. This review discusses chronic wound biology, the influence that skin substitutes can exert on this environment, the products currently available, and examines the evidence for their use in chronic wound management.
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Affiliation(s)
- Nicholas S Greaves
- Plastic and Reconstructive Surgery Research, Manchester Institute of Biotechnology (MIB), The University of Manchester, Manchester, United Kingdom
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Cutaneous wound healing: recruiting developmental pathways for regeneration. Cell Mol Life Sci 2012; 70:2059-81. [PMID: 23052205 PMCID: PMC3663196 DOI: 10.1007/s00018-012-1152-9] [Citation(s) in RCA: 313] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 08/29/2012] [Accepted: 08/30/2012] [Indexed: 12/15/2022]
Abstract
Following a skin injury, the damaged tissue is repaired through the coordinated biological actions that constitute the cutaneous healing response. In mammals, repaired skin is not identical to intact uninjured skin, however, and this disparity may be caused by differences in the mechanisms that regulate postnatal cutaneous wound repair compared to embryonic skin development. Improving our understanding of the molecular pathways that are involved in these processes is essential to generate new therapies for wound healing complications. Here we focus on the roles of several key developmental signaling pathways (Wnt/β-catenin, TGF-β, Hedgehog, Notch) in mammalian cutaneous wound repair, and compare this to their function in skin development. We discuss the varying responses to cutaneous injury across the taxa, ranging from complete regeneration to scar tissue formation. Finally, we outline how research into the role of developmental pathways during skin repair has contributed to current wound therapies, and holds potential for the development of more effective treatments.
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A preliminary study of differentially expressed genes in expanded skin and normal skin: implications for adult skin regeneration. Arch Dermatol Res 2011; 303:125-33. [PMID: 21286735 DOI: 10.1007/s00403-011-1123-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2010] [Revised: 01/09/2011] [Accepted: 01/13/2011] [Indexed: 01/31/2023]
Abstract
In adults, severely damaged skin heals by scar formation and cannot regenerate to the original skin structure. However, tissue expansion is an exception, as normal skin regenerates under the mechanical stretch resulting from tissue expansion. This technique has been used clinically for defect repair and organ reconstruction for decades. However, the phenomenon of adult skin regeneration during tissue expansion has caused little attention, and the mechanism of skin regeneration during tissue expansion has not been fully understood. In this study, microarray analysis was performed on expanded human skin and normal human skin. Significant difference was observed in 77 genes, which suggest a network of several integrated cascades, including cytokines, extracellular, cytoskeletal, transmembrane molecular systems, ion or ion channels, protein kinases and transcriptional systems, is involved in the skin regeneration during expansion. Among these, the significant expression of some regeneration related genes, such as HOXA5, HOXB2 and AP1, was the first report in tissue expansion. Data in this study suggest a list of candidate genes, which may help to elucidate the fundamental mechanism of skin regeneration during tissue expansion and which may have implications for postnatal skin regeneration and therapeutic interventions in wound healing.
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Bone Marrow–derived Mesenchymal Stem Cells Transplantation Accelerates Tissue Expansion by Promoting Skin Regeneration During Expansion. Ann Surg 2011; 253:202-9. [DOI: 10.1097/sla.0b013e3181f9ba1ah] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Yeh J, Green LM, Jiang TX, Plikus M, Huang E, Chang RN, Hughes MW, Chuong CM, Tuan TL. Accelerated closure of skin wounds in mice deficient in the homeobox gene Msx2. Wound Repair Regen 2009; 17:639-48. [PMID: 19769717 DOI: 10.1111/j.1524-475x.2009.00535.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Differences in cellular competence offer an explanation for the differences in the healing capacity of tissues of various ages and conditions. The homeobox family of genes plays key roles in governing cellular competence. Of these, we hypothesize that Msx2 is a strong candidate regulator of competence in skin wound healing because it is expressed in the skin during fetal development in the stage of scarless healing, affects postnatal digit regeneration, and is reexpressed transiently during postnatal skin wound repair. To address whether Msx2 affects cellular competence in injury repair, 3 mm full-thickness excisional wounds were created on the back of C.Cg-Msx2(tm1Rilm)/Mmcd (Msx2 null) mice and the healing pattern was compared with that of the wild type mice. The results show that Msx2 null mice exhibited faster wound closure with accelerated reepithelialization plus earlier appearance of keratin markers for differentiation and an increased level of smooth muscle actin and tenascin in the granulation tissue. In vitro, keratinocytes of Msx2 null mice exhibit increased cell migration and the fibroblasts show stronger collagen gel contraction. Thus, our results suggest that Msx2 regulates the cellular competence of keratinocytes and fibroblasts in skin injury repair.
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Affiliation(s)
- Jennifer Yeh
- Department of Pathology, University of Southern California, Los Angeles, CA, USA
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Affiliation(s)
- James C Y Dunn
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA.
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