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Hameed A, Tariq M, Sadia S, Alam MR, Haider A, Wahedi HM. Aloesin-loaded chitosan/cellulose-based scaffold promotes skin tissue regeneration. Int J Biol Macromol 2024; 273:133030. [PMID: 38857730 DOI: 10.1016/j.ijbiomac.2024.133030] [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: 03/14/2024] [Revised: 05/14/2024] [Accepted: 06/07/2024] [Indexed: 06/12/2024]
Abstract
Skin wound healing and regeneration is very challenging across the world as simple or acute wounds can be transformed into chronic wounds or ulcers due to foreign body invasion, or diseases like diabetes or cancer. The study was designed to develop a novel bioactive scaffold, by loading aloesin to chitosan-coated cellulose scaffold, to cure full-thickness skin wounds. The physiochemical characterization of the scaffold was carried out using scanning electron microscopy (SEM) facilitated by energy-dispersive spectrophotometer (EDS), atomic force microscopy (AFM), and Fourier transform infrared spectroscopy (FTIR). The results indicated the successful coating of chitosan and aloesin on cellulose without any physical damage. The drug release kinetics confirmed the sustained release of aloesin by showing a cumulative release of up to 88 % over 24 h. The biocompatibility of the aloesin-loaded chitosan/cellulose (AlCsCFp) scaffold was evaluated by the WST-8 assay that confirmed the significantly increased adherence and proliferation of fibroblasts on the AlCsCFp scaffold. The in vivo wound healing study showed that both 0.05 % and 0.025 % AlCsCFp scaffolds have significantly higher wound closure rates (i.e. 88.2 % and 95.6 % approximately) as compared to other groups. This showed that novel composite scaffold has a wound healing ability. Furthermore, histological and gene expression analysis demonstrated that the scaffold also induced cell migration, angiogenesis, re-epithelialization, collagen deposition, and tissue granulation formation. Thus, it is concluded that the aloesin-loaded chitosan/cellulose-based scaffold has great therapeutic potential for being used in wound healing applications in the clinical setting in the future.
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Affiliation(s)
- Aasia Hameed
- Department of Biomedicine, Atta-ur-Rehman School of Applied Biosciences, National University of Sciences & Technology, Sector H-12, 44000 Islamabad, Pakistan; Department of Biological Sciences, National University of Medical Sciences, Abid Majeed Road, 46000 Rawalpindi, Pakistan
| | - Mehreen Tariq
- Department of Biological Sciences, National University of Medical Sciences, Abid Majeed Road, 46000 Rawalpindi, Pakistan
| | - Sobia Sadia
- Department of Biological Sciences, National University of Medical Sciences, Abid Majeed Road, 46000 Rawalpindi, Pakistan
| | - M Rizwan Alam
- Department of Biochemistry, Quaid-I-Azam University, Islamabad Capital Territory 45320, Pakistan
| | - Adnan Haider
- Department of Biological Sciences, National University of Medical Sciences, Abid Majeed Road, 46000 Rawalpindi, Pakistan
| | - Hussain Mustatab Wahedi
- Department of Biomedicine, Atta-ur-Rehman School of Applied Biosciences, National University of Sciences & Technology, Sector H-12, 44000 Islamabad, Pakistan.
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Khader R, Whitehead-Clarke T, Mudera V, Kureshi A. Assessment of mesh shrinkage using fibroblast-populated collagen matrices: a proof of concept for in vitro hernia mesh testing. Hernia 2024; 28:495-505. [PMID: 38180627 PMCID: PMC10997730 DOI: 10.1007/s10029-023-02941-6] [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: 05/10/2023] [Accepted: 12/07/2023] [Indexed: 01/06/2024]
Abstract
PURPOSE This study uses free-floating contractile fibroblast-populated collagen matrices (FPCMs) to test the shrinkage of different hernia mesh products. We hope to present this model as a proof of concept for the development of in vitro hernia mesh testing-a novel technology with interesting potential. METHODS FPCMs were formed by seeding Human Dermal Fibroblasts into collagen gels. FPCMs were seeded with three different cell densities and cast at a volume of 500 μl into 24-well plates. Five different mesh products were embedded within the collagen constructs. Gels were left to float freely within culture media and contract over 5 days. Photographs were taken daily and the area of the collagen gel and mesh were measured. Media samples were taken at days 2 and 4 for the purposes of measuring MMP-9 release. After 5 days, dehydrated FPCMs were also examined under light and fluorescence microscopy to assess cell morphology. RESULTS Two mesh products-the mosquito net and large pore lightweight mesh were found to shrink notably more than others. This pattern persisted across all three cell densities. There were no appreciable differences observed in MMP-9 release between products. CONCLUSIONS This study has successfully demonstrated that commercial mesh products can be successfully integrated into free-floating contractile FPCMs. Not only this, but FPCMs are capable of applying a contractile force upon those mesh products-eliciting different levels of contraction between mesh products. Such findings demonstrate this technique as a useful proof of concept for future development of in vitro hernia mesh testing.
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Affiliation(s)
- R Khader
- Centre for 3D Models of Health and Disease, Division of Surgery & Interventional Science, University College London, London, UK
| | - T Whitehead-Clarke
- Centre for 3D Models of Health and Disease, Division of Surgery & Interventional Science, University College London, London, UK.
| | - V Mudera
- Centre for 3D Models of Health and Disease, Division of Surgery & Interventional Science, University College London, London, UK
| | - A Kureshi
- Centre for 3D Models of Health and Disease, Division of Surgery & Interventional Science, University College London, London, UK
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Rosli MA, Mohd Nasir NA, Mustafa MZ, Othman MA, Zakaria Z, Halim AS. Effectiveness of stingless bee (Kelulut) honey versus conventional gel dressing in diabetic wound bed preparation: A randomized controlled trial. J Taibah Univ Med Sci 2024; 19:209-219. [PMID: 38124990 PMCID: PMC10730855 DOI: 10.1016/j.jtumed.2023.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 10/05/2023] [Accepted: 11/06/2023] [Indexed: 12/23/2023] Open
Abstract
Purpose Kelulut honey contains trehalulose and has high antioxidant content, such as phenolic and flavonoid substances, which can promote wound healing. This study evaluated the effectiveness of Kelulut honey in diabetic wound healing compared to a commercially available conventional gel dressing (Intrasite gel). Methods A prospective, randomized, single-blinded control trial was performed on eligible diabetic patients with full-thickness cavity wounds. Patients' demographics, size and site of wounds, and baseline routine blood investigations were recorded. The wounds were dressed every other day with Kelulut honey for the intervention group or gel for the control group. The wound size reduction and granulation tissue formation percentage were calculated every 6 days for 1 month. Results Seventy-one patients were randomized. After 30 days of follow-up, 62 participants were available for analysis: 30 from the control group and 32 from the treatment group. The control group had increased granulation tissue at baseline and more wounds on the lower limb and posterior trunk. Both groups showed an increasing mean and median percentage of wound epithelialization and granulation tissue over time, with significantly higher values at every timepoint in the honey group (p < 0.05). However, repeated measures analysis of variance and analysis of covariance revealed no significant interaction effect between the different treatments and time, with F (2.02, 121.28) = 0.88, p = 0.417 and F (1.60, 93.95) = 0.79, p = 0.431, respectively. Conclusion This study revealed that Kelulut honey was comparable to and as effective as the conventional gel in treating diabetic wounds in terms of promoting epithelialization and granulation tissue formation.
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Affiliation(s)
- Mohamad A. Rosli
- Reconstructive Sciences Unit, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Nur A. Mohd Nasir
- Reconstructive Sciences Unit, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Mohd Z. Mustafa
- Department of Neurosciences, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Muhammad A. Othman
- Enterostomal Therapy Unit, Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu Kelantan, Malaysia
- Department of Surgery, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Zaidi Zakaria
- Enterostomal Therapy Unit, Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu Kelantan, Malaysia
- Department of Surgery, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
| | - Ahmad S. Halim
- Reconstructive Sciences Unit, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Health Campus, Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia
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Farid A, Ooda A, Nabil A, Nasser A, Ahmed E, Ali F, Mohamed F, Farid H, Badran M, Ahmed M, Ibrahim M, Rasmy M, Saleeb M, Riad V, Ibrahim Y, Madbouly N. Eobania vermiculata whole-body muscle extract-loaded chitosan nanoparticles enhanced skin regeneration and decreased pro-inflammatory cytokines in vivo. J Nanobiotechnology 2023; 21:373. [PMID: 37828599 PMCID: PMC10571447 DOI: 10.1186/s12951-023-02143-3] [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: 08/20/2023] [Accepted: 10/04/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND Usually, wounds recover in four to six weeks. Wounds that take longer time than this to heal are referred to as chronic wounds. Impaired healing can be caused by several circumstances like hypoxia, microbial colonization, deficiency of blood flow, reperfusion damage, abnormal cellular reaction and deficiencies in collagen production. Treatment of wounds can be enhanced through systemic injection of the antibacterial drugs and/or other topical applications of medications. However, there are a number of disadvantages to these techniques, including the limited or insufficient medication penetration into the underlying skin tissue and the development of bacterial resistance with repeated antibiotic treatment. One of the more recent treatment options may involve using nanotherapeutics in combination with naturally occurring biological components, such as snail extracts (SE). In this investigation, chitosan nanoparticles (CS NPs) were loaded with an Eobania vermiculata whole-body muscle extract. The safety of the synthesized NPs was investigated in vitro to determine if these NPs might be utilized to treat full-skin induced wounds in vivo. RESULTS SEM and TEM images showed uniformly distributed, spherical, smooth prepared CS NPs and snail extract-loaded chitosan nanoparticles (SE-CS NPs) with size ranges of 76-81 and 91-95 nm, respectively. The zeta potential of the synthesized SE-CS NPs was - 24.5 mV, while that of the CS NPs was 25 mV. SE-CS NPs showed a remarkable, in vitro, antioxidant, anti-inflammatory and antimicrobial activities. Successfully, SE-CS NPs (50 mg/kg) reduced the oxidative stress marker (malondialdehyde), reduced inflammation, increased the levels of the antioxidant enzymes (superoxide dismutase and glutathione), and assisted the healing of induced wounds. SE-CS NPs (50 mg/kg) can be recommended to treat induced wounds safely. SE was composed of a collection of several wound healing bioactive components [fatty acids, amino acids, minerals and vitamins) that were loaded on CS NPs. CONCLUSIONS The nanostructure enabled bioactive SE components to pass through cell membranes and exhibit their antioxidant and anti-inflammatory actions, accelerating the healing process of wounds. Finally, it is advised to treat rats' wounds with SE-CS NPs.
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Affiliation(s)
- Alyaa Farid
- Biotechnology Department, Faculty of Science, Cairo University, Giza, Egypt.
| | - Adham Ooda
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Ahmed Nabil
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Areej Nasser
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Esraa Ahmed
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Fatma Ali
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Fatma Mohamed
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Habiba Farid
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Mai Badran
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Mariam Ahmed
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Mariam Ibrahim
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Mariam Rasmy
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Martina Saleeb
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Vereena Riad
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Yousr Ibrahim
- Biotechnology/Biomolecular Chemistry Program, Faculty of Science, Cairo University, Giza, Egypt
| | - Neveen Madbouly
- Zoology Department, Faculty of Science, Cairo University, Giza, Egypt
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Niyogi U, Jara CP, Carlson MA. Treatment of aged wound healing models with FGF2 and ABT-737 reduces the senescent cell population and increases wound closure rate. Wound Repair Regen 2023; 31:613-626. [PMID: 37462279 DOI: 10.1111/wrr.13106] [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: 11/19/2021] [Revised: 03/30/2023] [Accepted: 04/19/2023] [Indexed: 07/28/2023]
Abstract
Delayed tissue repair in the aged presents a major socio-economic and clinical problem. Age-associated delay in wound healing can be attributed to multiple factors, including an increased presence of senescent cells persisting in the wound. Although the transient presence of senescent cells is physiologic during the resolution phase of normal healing, increased senescent cell accumulation with age can negatively impact tissue repair. The objective of the study was to test interventional strategies that could mitigate the negative effect of senescent cell accumulation and possibly improve the age-associated delay in wound healing. We utilised a 3D in vitro senescent fibroblast populated collagen matrix (FPCM) to study cellular events associated with senescence and delayed healing. Senescent fibroblasts showed an increase in anti-apoptotic B-cell lymphoma 2 (BCL-2) family proteins. We hypothesized that reducing the senescent cell population and promoting non-senescent cell functionality would mitigate the negative effect of senescence and improve healing kinetics. BCL-2 inhibition and mitogen stimulation (FGF2) improved healing in the in vitro senescent models. These results were confirmed with an ex vivo human skin biopsy model. These data suggested that modulation of the senescent cell population with soluble factors improved the healing outcome in our in vitro and ex vivo healing models.
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Affiliation(s)
- Upasana Niyogi
- Department of Molecular Genetics and Cell Biology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Carlos Poblete Jara
- Department of Vascular Surgery, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Mark A Carlson
- Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, USA
- Surgery Department, Omaha VA Medical Center, Omaha, Nebraska, USA
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Cao X, Lin X, Li N, Zhao X, Zhou M, Zhao Y. Animal tissue-derived biomaterials for promoting wound healing. MATERIALS HORIZONS 2023; 10:3237-3256. [PMID: 37278612 DOI: 10.1039/d3mh00411b] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The skin serves as the primary barrier between the human body and external environment, and is therefore susceptible to damage from various factors. In response to this challenge, animal tissue-derived biomaterials have emerged as promising candidates for wound healing due to their abundant sources, low side-effect profiles, exceptional bioactivity, biocompatibility, and unique extracellular matrix (ECM) mimicry. The evolution of modern engineering technology and therapies has allowed these animal tissue-derived biomaterials to be transformed into various forms and modified to possess the necessary properties for wound repair. This review provides an overview of the wound healing process and the factors that influence it. We then describe the extraction methods, important properties, and recent practical applications of various animal tissue-derived biomaterials. Our focus then shifts to the critical properties of these biomaterials in skin wound healing and their latest research developments. Finally, we critically examine the limitations and future prospects of biomaterials generated from animal tissues in this field.
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Affiliation(s)
- Xinyue Cao
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Xiang Lin
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Ning Li
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Xiaozhi Zhao
- Department of Andrology, Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing 210008, China.
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Yuanjin Zhao
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
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ElHawary H, Covone J, Abdulkarim S, Janis JE. Practical Review on Delayed Primary Closure: Basic Science and Clinical Applications. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e5172. [PMID: 37547342 PMCID: PMC10402984 DOI: 10.1097/gox.0000000000005172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/22/2023] [Indexed: 08/08/2023]
Abstract
Wound healing complications present a significant burden on both patients and health-care systems, and understanding wound healing principles is crucial across medical and surgical specialties to help mitigate such complications. One of these longstanding principles, specifically delayed primary closure (DPC), described as mechanically closing a wound after several days of secondary intention healing, lacks clear consensus on its definition, indications, and outcomes. This practical review examines wound healing fundamentals, focusing on DPC, its execution, indications, and comparative outcomes. A PubMed literature search was conducted to retrieve studies on DPC. Inclusion criteria included comparative studies assessing outcomes and complications between DPC and other closure techniques, as well as articles investigating DPC's underlying physiology. Twenty-three comparative studies met inclusion criteria. DPC wounds have significantly higher partial pressure of oxygen, higher blood flow, and higher rates of collagen synthesis and remodeling activity, all of which help explain DPC wounds' superior mechanical strength. DPC seems most beneficial in contaminated wounds, such as complicated appendectomies, postcardiac surgery wounds, and complicated abdominal wall reconstructions, where it has been associated with lower rates of surgical site infections. This practical review provides an evidence-based approach to DPC, its physiology, technique, and indications. Based on the existing literature, the authors recommend that DPC wounds should be dressed in saline/betadine soaks, changed and irrigated daily, with delayed closure lasting between 3 and 5 days or until the infection has resolved. The clearest indications for DPC are in the context of contaminated abdominal surgery and sternal wound dehiscence post cardiac surgery.
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Affiliation(s)
- Hassan ElHawary
- From the Division of Plastic and Reconstructive Surgery, McGill University Health Centre, Montréal, Quebec, Canada
| | - Jason Covone
- Faculty of Medicine, McGill University Health Centre, Montréal, Quebec, Canada
| | - Shafic Abdulkarim
- Department of Surgery, McGill University Health Centre, Montréal, Quebec, Canada
| | - Jeffrey E. Janis
- Department of Plastic Surgery, Ohio State University Wexner Medical Center, Columbus, Ohio
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Nosrati F, Grillari J, Azarnia M, Nabiuni M, Moghadasali R, Karimzadeh L, Lämmermann I. The expression of fibrosis-related genes is elevated in doxorubicin-induced senescent human dermal fibroblasts, but their secretome does not trigger a paracrine fibrotic response in non-senescent cells. Biogerontology 2023; 24:293-301. [PMID: 36648709 PMCID: PMC10006027 DOI: 10.1007/s10522-022-10013-y] [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: 10/05/2022] [Accepted: 11/08/2022] [Indexed: 01/18/2023]
Abstract
Tissue fibrosis is associated with the aging process of most of our organs, and organ aging correlates with the chronic accumulation of senescent cells. Fibrosis occurs when fibroblasts proliferate and deposit pathological amounts of extracellular matrix (ECM), leading to progressive tissue scarring and organ dysfunction. Fibroblasts play a key role in fibrosis, especially in the skin where fibroblasts are the most abundant cell type in the dermis and are mainly responsible for the synthesis of ECM. This study aims to investigate how senescent fibroblasts and their secretome influence dermal fibrosis. Here we used human dermal fibroblasts (HDFs) treated with doxorubicin (doxo) to induce senescence. The senescent phenotype of these stress-induced premature senescent (SIPS) cells was confirmed with several markers. The expression of pro-fibrotic genes was quantified and finally, the impact of their secretome on the fibrotic response of non-senescent fibroblasts was assessed. Doxorubicin treatment, induced senescence in fibroblasts which has been confirmed with elevated senescence-associated β- galactosidase (SA-β-gal) activity, absence of BrdU incorporation, upregulation of p21, and loss of Lamin b1. Expression levels of the pro-fibrotic genes ACTA2 and FN1 increased in SIPS cells, but in contrast to studies using lung fibroblasts the secretome of these cells failed to induce a paracrine fibrotic response in non-senescent cells. In general, these results suggest that these senescent cells are potentially profibrotic, and their accumulation can trigger fibrosis in organs.
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Affiliation(s)
- Fariba Nosrati
- Department of Animal Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran
- Department of Biotechnology, Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
| | - Johannes Grillari
- Department of Biotechnology, Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, 1190, Vienna, Austria.
- Ludwig Boltzmann Institute for Traumatology, The Research Center in Cooperation with AUVA, Vienna, Austria.
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.
| | - Mahnaz Azarnia
- Department of Animal Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran.
| | - Mohammad Nabiuni
- Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Reza Moghadasali
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Latifeh Karimzadeh
- Department of Animal Biology, Faculty of Biological Science, Kharazmi University, Tehran, Iran
| | - Ingo Lämmermann
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
- Rockfish Bio AG, Vienna, Austria
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Bates JHT, Herrmann J, Casey DT, Suki B. An agent-based model of tissue maintenance and self-repair. Am J Physiol Cell Physiol 2023; 324:C941-C950. [PMID: 36878841 PMCID: PMC10089306 DOI: 10.1152/ajpcell.00531.2022] [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: 11/28/2022] [Revised: 02/10/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023]
Abstract
We hypothesized that a system that possesses the capacity for ongoing maintenance of its tissues will necessarily also have the capacity to self-heal following a perturbation. We used an agent-based model of tissue maintenance to investigate this idea, and in particular to determine the extent to which the current state of the tissue must influence cell behavior in order for tissue maintenance and self-healing to be stable. We show that a mean level of tissue density is robustly maintained when catabolic agents digest tissue at a rate proportional to local tissue density, but that the spatial heterogeneity of the tissue at homeostasis increases with the rate at which tissue is digested. The rate of self-healing is also increased by increasing either the amount of tissue removed or deposited at each time step by catabolic or anabolic agents, respectively, and by increasing the density of both agent types on the tissue. We also found that tissue maintenance and self-healing are stable with an alternate rule in which cells move preferentially to tissue regions of low density. The most basic form of self-healing can thus be achieved with cells that follow very simple rules of behavior, provided these rules are based in some way on the current state of the local tissue. Straightforward mechanisms can accelerate the rate of self-healing, as might be beneficial to the organism.
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Affiliation(s)
- Jason H T Bates
- Department of Medicine, University of Vermont, Burlington, Vermont, United States
| | - Jacob Herrmann
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States
| | - Dylan T Casey
- Department of Medicine, University of Vermont, Burlington, Vermont, United States
- Complex Systems Center, University of Vermont, Burlington, Vermont, United States
| | - Béla Suki
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, United States
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10
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Zhang KW, Jia Y, Li YY, Guo DY, Li XX, Hu K, Qian XX, Chen ZH, Wu JJ, Yuan ZD, Yuan FL. LEP and LEPR are possibly a double-edged sword for wound healing. J Cell Physiol 2023; 238:355-365. [PMID: 36571294 DOI: 10.1002/jcp.30936] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/05/2022] [Accepted: 12/13/2022] [Indexed: 12/27/2022]
Abstract
Wound healing is a complex and error-prone process. Wound healing in adults often leads to the formation of scars, a type of fibrotic tissue that lacks skin appendages. Hypertrophic scars and keloids can also form when the wound-healing process goes wrong. Leptin (Lep) and leptin receptors (LepRs) have recently been shown to affect multiple stages of wound healing. This effect, however, is paradoxical for scarless wound healing. On the one hand, Lep exerts pro-inflammatory and profibrotic effects; on the other hand, Lep can regulate hair follicle growth. This paper summarises the role of Lep and LepRs on cells in different stages of wound healing, briefly introduces the process of wound healing and Lep and LepRs, and examines the possibility of promoting scarless wound healing through spatiotemporal, systemic, and local regulation of Lep levels and the binding of Lep and LepRs.
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Affiliation(s)
- Kai-Wen Zhang
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China
| | - Yuan Jia
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China
| | - Yue-Yue Li
- Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Dan-Yang Guo
- Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Xiao-Xiao Li
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China
| | - Kai Hu
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China
| | - Xiao-Xi Qian
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China
| | - Zhong-Hua Chen
- Department of Medicine, The Nantong University, Nantong, China
| | - Jun-Jie Wu
- Institute of Integrated Chinese and Western Medicine, The Hospital Affiliated to Jiangnan University, Wuxi, China
| | - Zheng-Dong Yuan
- Institute of Integrated Chinese and Western Medicine, The Hospital Affiliated to Jiangnan University, Wuxi, China
| | - Feng-Lai Yuan
- Department of Medicine, Institute of Integrated Traditional Chinese and Western Medicine, Wuxi Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Traditional Chinese Medicine, Wuxi, China.,Affiliated Hospital of Jiangnan University, Wuxi, China.,Institute of Integrated Chinese and Western Medicine, The Hospital Affiliated to Jiangnan University, Wuxi, China
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Rathnayake RAC, Yoon S, Zheng S, Clutter ED, Wang RR. Electrospun Silk Fibroin-CNT Composite Fibers: Characterization and Application in Mediating Fibroblast Stimulation. Polymers (Basel) 2022; 15:polym15010091. [PMID: 36616441 PMCID: PMC9824115 DOI: 10.3390/polym15010091] [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: 11/30/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
Electrospinning is a simple, low-cost, and highly efficient technique to generate desirable nano/microfibers from polymer solutions. Silk fibroin (SF), a biopolymer found in Bombyx mori cocoons, has attracted attention for various biomedical applications. In this study, functionalized CNT was incorporated in SF to generate biocomposite fibers by electrospinning. The electrospun (E-spun) fibers were well aligned with morphology mimicking the locally oriented ECM proteins in connective tissues. While as-spun fibers dissolved in water in just two minutes, ethanol vapor post-treatment promoted β-sheet formation leading to improved fiber stability in an aqueous environment (>14 days). The addition of a minute amount of CNT effectively improved the E-spun fiber alignment and mechanical strength while retained high biocompatibility and biodegradability. The fibers’ electrical conductivity increased by 13.7 folds and 21.8 folds, respectively, in the presence of 0.1 w% and 0.2 w% CNT in SF fibers. With aligned SF-CNT 0.1 % fibers as a cell culture matrix, we found electrical stimulation effectively activated fibroblasts from patients of pelvic organ prolapse (POP), a connective tissue disorder. The stimulation boosted the fibroblasts’ productivity of collagen III (COLIII) and collagen I (COLI) by 74 folds and 58 folds, respectively, and reduced the COLI to COLIII ratio favorable for tissue repair. The developed material and method offer a simple, direct, and effective way to remedy the dysfunctional fibroblasts of patients for personalized cell therapeutic treatment of diseases and health conditions associated with collagen disorder.
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Detwiler A, Polkoff K, Gaffney L, Freytes DO, Piedrahita JA. Donor Age and Time in Culture Affect Dermal Fibroblast Contraction in an In Vitro Hydrogel Model. Tissue Eng Part A 2022; 28:833-844. [PMID: 35925753 PMCID: PMC9595626 DOI: 10.1089/ten.tea.2021.0217] [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: 02/02/2022] [Accepted: 05/31/2022] [Indexed: 11/12/2022] Open
Abstract
Current cellular hydrogel-based skin grafts composed of human dermal fibroblasts and a hydrogel scaffold tend to minimize contraction of full-thickness skin wounds and support skin regeneration. However, there has been no comparison between the sources of the dermal fibroblast used. Products using human adult or neonatal foreskin dermal fibroblasts are often expanded in vitro and used after multiple passages without a clear understanding of the effects of this initial production step on the quality and reproducibility of the cellular behavior. Based on the known effects of 2D tissue culture expansion on cellular proliferation and gene expression, we hypothesized that differences in donor age and time in culture may influence cellular properties and contractile behavior in a fibroblast-populated collagen matrix. Using porcine skin as a model based on its similarity to human skin in structure and wound healing properties, we isolated porcine dermal fibroblasts of three different donor ages for use in a 2D proliferation assay and in a 3D cell-populated collagen matrix contractility assay. In 2D cell culture, doubling time remained relatively consistent between all age groups from passage 1 to 6. In the contractility assays, fetal and neonatal groups contracted faster and generated more contractile force than the adult group at passage 1 in vitro. However, after five passages in culture, there was no difference in contractility between ages. These results show how cellular responses in a hydrogel scaffold differ based on donor age and time in culture in vitro, and suggest that consistency in the cellular component of bioengineered skin products could be beneficial in the biomanufacturing of consistent, reliable skin grafts and graft in vivo models. Future research and therapies using bioengineered skin grafts should consider how results may vary based on donor age and time in culture before seeding. Impact statement Little is known about the impact of donor cell age and time in culture on the contraction of cellular, hydrogel-based skin grafts. These results show how cellular phenotypes of porcine fibroblasts differ based on donor age and time in culture. This information is beneficial when addressing important inconsistencies in biomanufacturing of bioengineered skin grafts and in vitro models. These findings are relevant to research and therapies using bioengineered skin graft models and the results can be used to increase reproducibility and consistency during the production of bioengineered skin constructs. The information from this study can be extrapolated to future in vivo studies using human dermal fibroblasts in an in vivo model to help determine the best donor age and time in culture for optimal wound healing outcomes or more reproducible in vitro testing constructs.
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Affiliation(s)
- Amber Detwiler
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Joint Department of Biomedical Engineering, North Carolina State University/University of North Carolina-Chapel Hill, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Kathryn Polkoff
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Lewis Gaffney
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Joint Department of Biomedical Engineering, North Carolina State University/University of North Carolina-Chapel Hill, Raleigh, North Carolina, USA
| | - Donald O. Freytes
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Joint Department of Biomedical Engineering, North Carolina State University/University of North Carolina-Chapel Hill, Raleigh, North Carolina, USA
| | - Jorge A. Piedrahita
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Molecular Biomedical Sciences, North Carolina State University, Raleigh, North Carolina, USA
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13
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Amaliya A, Budhirahardjo I, Hendiani I. Histological Examination of Lemongrass Resorbable Dressing on Gingival Healing after Gingivectomy in Rats. Eur J Dent 2022. [PMID: 35760358 DOI: 10.1055/s-0042-1748197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
OBJECTIVES The present work aimed to evaluate the effect of lemongrass extract incorporated in a resorbable periodontal dressing on gingival wound healing microscopically, following gingivectomy in rats. MATERIALS AND METHODS Thirty healthy adult male Sprague-Dawley rats were used in this study. Gingivectomy was performed on anterior area of lower jaw in the labial surface of central incisive and, subsequently, wound areas were covered with povidone iodine gel (group P, positive control, n = 10), lemongrass resorbable dressing (group L, n = 10), and a cellulose-based dressing containing myrrh (group M, positive control, n = 10). Histological changes were monitored in days 4, 7, and 14 postsurgery to evaluate fibroblast and collagen deposition as repair stage of healing process. STATISTYCAL ANALYSIS One-way analysis of variance (ANOVA) followed by Tukey's post hoc for multiple comparisons were employed to measure differences between pairs of means, p-value of 0.05 was considered statistically significant. RESULTS We observed significant difference repair parameters of the healing process between surgical sites treated with lemongrass periodontal dressing and control groups. Wounds treated with lemongrass dressing had greater fibroblast compared with control groups in 4 and 7 days after surgery (p ≤ 0.05). CONCLUSION The results suggest positive potential therapeutic effects for this new formulation of periodontal dressing on acceleration of surgical wound healing that lead to improvement of periodontal treatment consequences following gingivectomy.
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Affiliation(s)
- Amaliya Amaliya
- Departement of Periodontology, Dental Faculty, Universitas Padjadjaran, West Java, Indonesia
| | - Indri Budhirahardjo
- Periodontal Clinic, Indonesian Naval Dental Institute Raden Eddy Martadinata, Central Jakarta
| | - Ina Hendiani
- Departement of Periodontology, Dental Faculty, Universitas Padjadjaran, West Java, Indonesia
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14
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Zhang Q, Wang P, Fang X, Lin F, Fang J, Xiong C. Collagen gel contraction assays: From modelling wound healing to quantifying cellular interactions with three-dimensional extracellular matrices. Eur J Cell Biol 2022; 101:151253. [PMID: 35785635 DOI: 10.1016/j.ejcb.2022.151253] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 06/06/2022] [Accepted: 06/24/2022] [Indexed: 12/12/2022] Open
Abstract
Cells respond to and actively remodel the extracellular matrix (ECM). The dynamic and bidirectional interaction between cells and ECM, especially their mechanical interactions, has been found to play an essential role in triggering a series of complex biochemical and biomechanical signal pathways and in regulating cellular functions and behaviours. The collagen gel contraction assay (CGCA) is a widely used method to investigate cell-ECM interactions in 3D environments and provides a mechanically associated readout reflecting 3D cellular contractility. In this review, we summarize various versions of CGCA, with an emphasis on recent high-throughput and low-consumption CGCA techniques. More importantly, we focus on the technique of force monitoring during the contraction of collagen gel, which provides a quantitative characterization of the overall forces generated by all the resident cells in the collagen hydrogel. Accordingly, we present recent biological applications of the CGCA, which have expanded from the initial wound healing model to other studies concerning cell-ECM interactions, including fibrosis, cancer, tissue repair and the preparation of biomimetic microtissues.
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Affiliation(s)
- Qing Zhang
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China
| | - Pudi Wang
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China
| | - Xu Fang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Feng Lin
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, China
| | - Jing Fang
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Chunyang Xiong
- Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, China.
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15
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Sun C, Yan H, Jiang K, Huang L. Protective Effect of Casticin on Experimental Skin Wound Healing of Rats. J Surg Res 2022; 274:145-152. [DOI: 10.1016/j.jss.2021.12.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 11/30/2021] [Accepted: 12/13/2021] [Indexed: 12/28/2022]
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16
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Muñoz-González PU, Lona-Ramos MC, Gutiérrez-Verdín LD, Luévano-Colmenero GH, Tenorio-Rocha F, García-Contreras R, González-García G, Rosillo-de la Torre A, Delgado J, Castellano LE, Mendoza-Novelo B. Gel dressing based on type I collagen modified with oligourethane and silica for skin wound healing. Biomed Mater 2022; 17. [PMID: 35483345 DOI: 10.1088/1748-605x/ac6b70] [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: 12/07/2021] [Accepted: 04/28/2022] [Indexed: 11/12/2022]
Abstract
Cutaneous wound healing is a complex process that leads the skin reparation with the formation of scar tissue that typically lacks skin appendages. This fact drives us to find new strategies to improve regenerative healing of the skin. This study outlines, the contribution of colloidal silica particles and oligourethane crosslinking on the collagen material properties and the effect on skin wound healing in rats. We characterized the gel properties that are key forin-situgelation, which is accomplished by the latent reactivity of oligourethane bearing blocked isocyanate groups to crosslink collagen while entrapping silica particles. The swelling/degradation behavior and the elastic modulus of the composite gel were consistent with the modification of collagen type I with oligourethane and silica. On the other hand, these gels were characterized as scaffold for murine macrophages and human stem cells. The application of a composite gel dressing on cutaneous wounds showed a histological appearance of the recovered skin as intact skin; featured by the epidermis, hair follicles, sebaceous glands, subcutaneous adipose layer, and dermis. The results suggest that the collagen-based composite dressings are promising modulators in skin wound healing to achieve a regenerative skin closure with satisfactory functional and aesthetic scars.
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Affiliation(s)
- Pedro U Muñoz-González
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México.,Natural and Exact Sciences Division, University of Guanajuato. Noria alta S/N, Col. Noria alta, C.P. 36050 Guanajuato, GTO, México
| | - María C Lona-Ramos
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México
| | - Luis D Gutiérrez-Verdín
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México.,Interdisciplinary Professional Engineering Unit Campus Guanajuato, National Polytechnic Institute. Mineral de Valenciana # 200, Col. Fraccionamiento industrial puerto interior, C.P. 36275 Silao de la Victoria, GTO, México
| | - Guadalupe H Luévano-Colmenero
- Interdisciplinary Professional Engineering Unit Campus Guanajuato, National Polytechnic Institute. Mineral de Valenciana # 200, Col. Fraccionamiento industrial puerto interior, C.P. 36275 Silao de la Victoria, GTO, México
| | - Fernando Tenorio-Rocha
- ENES León, National University Autonomous of Mexico, Boulevard UNAM #2011, Col. Predio el saucillo y el potrero, C.P. 37689 León, GTO, México
| | - René García-Contreras
- ENES León, National University Autonomous of Mexico, Boulevard UNAM #2011, Col. Predio el saucillo y el potrero, C.P. 37689 León, GTO, México
| | - Gerardo González-García
- Natural and Exact Sciences Division, University of Guanajuato. Noria alta S/N, Col. Noria alta, C.P. 36050 Guanajuato, GTO, México
| | - Argelia Rosillo-de la Torre
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México
| | - Jorge Delgado
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México
| | - Laura E Castellano
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México
| | - Birzabith Mendoza-Novelo
- Science and Engineering Division, University of Guanajuato. Loma del bosque # 103, Col. Lomas del campestre, C.P. 37150 León, GTO, México
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17
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Physically-based structural modeling of a typical regenerative tissue analog bridges material macroscale continuum and cellular microscale discreteness and elucidates the hierarchical characteristics of cell-matrix interaction. J Mech Behav Biomed Mater 2021; 126:104956. [PMID: 34930707 DOI: 10.1016/j.jmbbm.2021.104956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/22/2021] [Accepted: 11/01/2021] [Indexed: 11/20/2022]
Abstract
This paper presents a comprehensive physically-based structural modelling for the passive and active biomechanical processes in a typical engineered tissue - namely, cell-compacted collagen gel. First, it introduces a sinusoidal curve analog for quantifying the mechanical response of the collagen fibrils and a probability distribution function of the characteristic crimp ratio for taking into account the fibrillar geometric entropic effect. The constitutive framework based on these structural characteristics precisely reproduces the nonlinearity, the viscoelasticity, and fairly captures the Poisson effect exhibiting in the macroscale tensile tests; which, therefore, substantially validates the structural modelling for the analysis of the cell-gel interaction during collagen gel compaction. Second, a deterministic molecular clutch model specific to the interaction between the cell pseudopodium and the collagen network is developed, which emphasizes the dependence of traction force on clutch number altering with the retrograde flow velocity, actin polymeric velocity, and the deformation of the stretched fibril. The modelling reveals the hierarchical features of cellular substrate sensing, i.e. a biphasic traction force response to substrate elasticity begins at the level of individual fibrils and develops into the second biphasic sensing by means of the fibrillar number integration at the whole-cell level. Singular in crossing the realms of continuum and discrete mechanics, the methodologies developed in this study for modelling the filamentous materials and cell-fibril interaction deliver deep insight into the temporospatially dynamic 3D cell-matrix interaction, and are able to bridge the cellular microscale and material macroscale in the exploration of related topics in mechanobiology.
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18
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19
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Characterization of Collagen I Fiber Thickness, Density, and Orientation in the Human Skin In Vivo Using Second-Harmonic Generation Imaging. PHOTONICS 2021. [DOI: 10.3390/photonics8090404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The assessment of dermal alterations is necessary to monitor skin aging, cancer, and other skin diseases and alterations. The gold standard of morphologic diagnostics is still histopathology. Here, we proposed parameters to distinguish morphologically different collagen I structures in the extracellular matrix and to characterize varying collagen I structures in the skin with similar SAAID (SHG-to-AF Aging Index of Dermis, SHG—second-harmonic generation; AF—autofluorescence) values. Test datasets for the papillary and reticular extracellular matrix from images in 24 female subjects, 36 to 50 years of age, were generated. Parameters for SAAID, edge detection, and fast Fourier transformation directionality were determined. Additionally, textural analyses based on the grey level co-occurrence matrix (GLCM) were conducted. At first, changes in the GLCM parameters were determined in the native greyscale images and, furthermore, in the Hilbert-transformed images. Our results demonstrate a robust set of parameters for noninvasive in vivo classification for morphologically different collagen I structures in the skin, with similar and different SAAID values. We anticipate our method to enable an automated prevention and monitoring system with an age- and gender-specific algorithm.
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20
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Almadani YH, Vorstenbosch J, Davison PG, Murphy AM. Wound Healing: A Comprehensive Review. Semin Plast Surg 2021; 35:141-144. [PMID: 34526860 DOI: 10.1055/s-0041-1731791] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Wound healing is an intricate, tightly regulated process that is critical to maintaining the barrier function of skin along with preserving all other skin functions. This process can be influenced by a variety of modifiable and nonmodifiable factors. As wound healing takes place in all parts of the human body, this review focuses on cutaneous wound healing and highlights the classical wound healing phases. Alterations in any of these phases can promote chronic wound development and may impede wound healing.
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Affiliation(s)
- Yasser H Almadani
- Division of Plastic Surgery, McGill University, Montreal, Quebec, Canada
| | | | - Peter G Davison
- Division of Plastic Surgery, McGill University, Montreal, Quebec, Canada
| | - Amanda M Murphy
- Division of Plastic Surgery, McGill University, Montreal, Quebec, Canada
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21
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Li W, Chi N, Rathnayake RAC, Wang R. Distinctive roles of fibrillar collagen I and collagen III in mediating fibroblast-matrix interaction: A nanoscopic study. Biochem Biophys Res Commun 2021; 560:66-71. [PMID: 33975247 DOI: 10.1016/j.bbrc.2021.04.088] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 04/20/2021] [Indexed: 11/17/2022]
Abstract
One major goal in tissue engineering is to create functional materials, mimicking scaffolds in native tissues, to modulate cell function for tissue repair. Collagen is the most abundant structural protein in human body. Though collagen I (COLI) and collagen III (COLIII) are the predominant collagen types in connective tissues and they form stable hybrid fibrils at varied ratios, cell responses to the hybrid matrices are underinvestigated. In this work, we aim to explicate the distinctive roles of COLI and COLIII in fibroblast activation. Unidirectionally aligned COLI, COLIII and COLI-COLIII hybrid nanofibrils were generated via epitaxial growth of collagen on mica. AFM analyses revealed that, with the increase of COLI/COLIII ratio, the fibril width and stiffness increased and the binding affinity of cells to the matrix decreased. A hybrid matrix was found to activate fibroblasts the most effectively, characterized by extensive cell polarization with rigid stress fiber bundles and high α-SMA expression, and by the highest-level of collagen synthesis. It is ascribed to the fine balance between biochemical and biophysical cues achieved on the hybrid matrix. Thus, matrices of aligned COLI-COLIII hybrid fibrils and their derived multifunctional composites can be good candidates of implantation scaffolds for tissue regeneration.
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Affiliation(s)
- Wen Li
- Department of Chemistry, Illinois Institute of Technology, 3101 S. Dearborn St., Chicago, IL, 60616, USA
| | - Naiwei Chi
- Department of Chemistry, Illinois Institute of Technology, 3101 S. Dearborn St., Chicago, IL, 60616, USA
| | - Rathnayake A C Rathnayake
- Department of Chemistry, Illinois Institute of Technology, 3101 S. Dearborn St., Chicago, IL, 60616, USA
| | - Rong Wang
- Department of Chemistry, Illinois Institute of Technology, 3101 S. Dearborn St., Chicago, IL, 60616, USA.
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22
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Despoudi K, Mantzoros I, Ioannidis O, Loutzidou L, Christidis P, Chatzakis C, Gkasdaris G, Raptis D, Pramateftakis MG, Angelopoulos S, Zaraboukas T, Koliakos G, Tsalis K. Healing of colonic anastomosis in rats under obstructive ileus conditions. Discoveries (Craiova) 2021; 9:e129. [PMID: 34849396 PMCID: PMC8627191 DOI: 10.15190/d.2021.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/09/2021] [Accepted: 05/10/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The anastomosis leak in colon resections is a crucial post-operative complication with significant morbidity and mortality. Methods: Forty (40) Wistar rats were allocated in two groups. In SHAM group only anastomosis was performed. In ILEUS group anastomosis was performed following one day of ileus. Animals in both groups were subdivided in two groups according to the day they were sacrificed, 4th or 8th post-operative day. A number of variables between the groups were estimated. RESULTS Body weight loss was higher following obstructive ileus on both days. Adhesion score in 4th and 8th post-operative day was higher in ILEUS1, ILEUS2 groups compared to SHAM1, SHAM2 groups respectively (p<0.001 for both). Neovascularization decreased following obstructive ileus compared to control on the 4th day (ILEUS1 vs. SHAM1, p=0.038). Bursting pressure was lower in ILEUS2 group than SHAM2 group (p<0.001). The number of fibroblasts decreased following obstructive ileus compared to control on the 4th and 8th day (ILEUS1 vs. SHAM1, p=0.001, ILEUS2 vs SHAM2, p=0.016). Hydroxyproline concentration was decreased in ILEUS2 group compared to SHAM2 group (p<0.001). CONCLUSIONS The balance of collagenolysis and collagenogenesis plays a decisive role in the healing of anastomoses following bowel obstruction. Under those circumstances, anastomosis' bursting pressure is reduced owning to decreased neovascularization, reduced fibroblast presence and lower hydroxyproline concertation. In our study, local inflammation, neocollagen concentration and collagenase activity were not associated with this adverse effect. However, further research should delineate the mechanisms of healing of colonic anastomoses and identify those factors that can improve our outcomes.
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Affiliation(s)
- Kalliopi Despoudi
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Ioannis Mantzoros
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Orestis Ioannidis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Lydia Loutzidou
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Panagiotis Christidis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Christos Chatzakis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Grigorios Gkasdaris
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Dimitrios Raptis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Manousos George Pramateftakis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Stamatios Angelopoulos
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - Thomas Zaraboukas
- Department of Pathology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - George Koliakos
- Department of Biochemistry, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - Konstantinos Tsalis
- 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
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Suki B, Herrmann J, Bates JHT. An Analytic Model of Tissue Self-Healing and Its Network Implementation: Application to Fibrosis and Aging. Front Physiol 2020; 11:583024. [PMID: 33250776 PMCID: PMC7673435 DOI: 10.3389/fphys.2020.583024] [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: 07/14/2020] [Accepted: 09/28/2020] [Indexed: 11/16/2022] Open
Abstract
Here we present a model capable of self-healing and explore its ability to resolve pathological alterations in biological tissue. We derive a simple analytic model consisting of an agent representing a cell that exhibits anabolic or catabolic activity, and which interacts with its tissue substrate according to tissue stiffness. When perturbed, this system returns toward a stable fixed point, a process corresponding to self-healing. We implemented this agent-substrate mechanism numerically on a hexagonal elastic network representing biological tissue. Agents, representing fibroblasts, were placed on the network and allowed to migrate around while they remodeled the network elements according to their activity which was determined by the stiffnesses of network elements that each agent encountered during its random walk. Initial injury to the network was simulated by increasing the stiffness of a single central network element above baseline. This system also exhibits a fixed point represented by the uniform baseline state. During the approach to the fixed point, interactions between the agents and the network create a transient spatially extended halo of stiffer network elements around the site of initial injury, which aids in overall injury repair. Non-equilibrium constraints generated by persistent injury prohibit the network to return to baseline and results in progressive stiffening, mimicking the development of fibrosis. Additionally, reducing anabolic or catabolic rates delay self-healing, reminiscent of aging. Our model thus embodies what may be the simplest set of attributes required of a spatiotemporal self-healing system, and so may help understand altered self-healing in chronic fibrotic diseases and aging.
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Affiliation(s)
- Béla Suki
- Department of Biomedical Engineering, Boston University, Boston, MA, United States
| | - Jacob Herrmann
- Department of Biomedical Engineering, Boston University, Boston, MA, United States
| | - Jason H T Bates
- Department of Medicine, The University of Vermont, Burlington, VT, United States
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24
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A Tenon's capsule/bulbar conjunctiva interface biomimetic to model fibrosis and local drug delivery. PLoS One 2020; 15:e0241569. [PMID: 33141875 PMCID: PMC7608904 DOI: 10.1371/journal.pone.0241569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 10/18/2020] [Indexed: 12/13/2022] Open
Abstract
Glaucoma filtration surgery is one of the most effective methods for lowering intraocular pressure in glaucoma. The surgery efficiently reduces intra-ocular pressure but the most common cause of failure is scarring at the incision site. This occurs in the conjunctiva/Tenon’s capsule layer overlying the scleral coat of the eye. Currently used antimetabolite treatments to prevent post-surgical scarring are non-selective and are associated with potentially blinding side effects. Developing new treatments to target scarring requires both a better understanding of wound healing and scarring in the conjunctiva, and new means of delivering anti-scarring drugs locally and sustainably. By combining plastic compression of collagen gels with a soft collagen-based layer, we have developed a physiologically relevant model of the sub-epithelial bulbar conjunctiva/Tenon’s capsule interface, which allows a more holistic approach to the understanding of subconjunctival tissue behaviour and local drug delivery. The biomimetic tissue hosts both primary human conjunctival fibroblasts and an immune component in the form of macrophages, morphologically and structurally mimicking the mechanical proprieties and contraction kinetics of ex vivo porcine conjunctiva. We show that our model is suitable for the screening of drugs targeting scarring and/or inflammation, and amenable to the study of local drug delivery devices that can be inserted in between the two layers of the biomimetic. We propose that this multicellular-bilayer engineered tissue will be useful to study complex biological aspects of scarring and fibrosis, including the role of inflammation, with potentially significant implications for the management of scarring following glaucoma filtration surgery and other anterior ocular segment scarring conditions. Crucially, it uniquely allows the evaluation of new means of local drug delivery within a physiologically relevant tissue mimetic, mimicking intraoperative drug delivery in vivo.
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Debele TA, Su WP. Polysaccharide and protein-based functional wound dressing materials and applications. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1809403] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Tilahun Ayane Debele
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan 704, Taiwan
- Department of Medical Biochemistry, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia
| | - Wen-Pin Su
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, No. 138, Sheng Li Road, Tainan 704, Taiwan
- Departments of Oncology and Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 704, Taiwan
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Kim HS, Chen J, Wu LP, Wu J, Xiang H, Leong KW, Han J. Prevention of excessive scar formation using nanofibrous meshes made of biodegradable elastomer poly(3-hydroxybutyrate- co-3-hydroxyvalerate). J Tissue Eng 2020; 11:2041731420949332. [PMID: 32922720 PMCID: PMC7448259 DOI: 10.1177/2041731420949332] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 07/23/2020] [Indexed: 11/24/2022] Open
Abstract
To reduce excessive scarring in wound healing, electrospun nanofibrous meshes, composed of haloarchaea-produced biodegradable elastomer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), are fabricated for use as a wound dressing. Three PHBV polymers with different 3HV content are used to prepare either solution-cast films or electrospun nanofibrous meshes. As 3HV content increases, the crystallinity decreases and the scaffolds become more elastic. The nanofibrous meshes exhibit greater elasticity and elongation at break than films. When used to culture human dermal fibroblasts in vitro, PHBV meshes give better cell attachment and proliferation, less differentiation to myofibroblasts, and less substrate contraction. In a full-thickness mouse wound model, treatment with films or meshes enables regeneration of pale thin tissues without scabs, dehydration, or tubercular scar formation. The epidermis of wounds treated with meshes develop small invaginations in the dermis within 2 weeks, indicating hair follicle and sweat gland regeneration. Consistent with the in vitro results, meshes reduce myofibroblast differentiation in vivo through downregulation of α-SMA and TGF-β1, and upregulation of TGF-β3. The regenerated wounds treated with meshes are softer and more elastic than those treated with films. These results demonstrate that electrospun nanofibrous PHBV meshes mitigate excessive scar formation by regulating myofibroblast formation, showing their promise for use as wound dressings.
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Affiliation(s)
- Hye Sung Kim
- Department of Biomedical Engineering, Columbia University, New York, NY, USA.,Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, Republic of Korea
| | - Junyu Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Lin-Ping Wu
- Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Jihua Wu
- PLA Strategic Support Force Characteristic Medical Center, Beijing, China
| | - Hua Xiang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, USA
| | - Jing Han
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
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Masson‐Meyers DS, Andrade TAM, Caetano GF, Guimaraes FR, Leite MN, Leite SN, Frade MAC. Experimental models and methods for cutaneous wound healing assessment. Int J Exp Pathol 2020; 101:21-37. [PMID: 32227524 PMCID: PMC7306904 DOI: 10.1111/iep.12346] [Citation(s) in RCA: 154] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 01/20/2020] [Accepted: 02/06/2020] [Indexed: 12/15/2022] Open
Abstract
Wound healing studies are intricate, mainly because of the multifaceted nature of the wound environment and the complexity of the healing process, which integrates a variety of cells and repair phases, including inflammation, proliferation, reepithelialization and remodelling. There are a variety of possible preclinical models, such as in mice, rabbits and pigs, which can be used to mimic acute or impaired for example, diabetic and nutrition-related wounds. These can be induced by many different techniques, with excision or incision being the most common. After determining a suitable model for a study, investigators need to select appropriate and reproducible methods that will allow the monitoring of the wound progression over time. The assessment can be performed by non-invasive protocols such as wound tracing, photographic documentation (including image analysis), biophysical techniques and/or by invasive protocols that will require wound biopsies. In this article, we provide an overview of some of the most often needed and used: (a) preclinical/animal models including incisional, excisional, burn and impaired wounds; (b) methods to evaluate the healing progression such as wound healing rate, wound analysis by image, biophysical assessment, histopathological, immunological and biochemical assays. The aim is to help researchers during the design and execution of their wound healing studies.
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Affiliation(s)
- Daniela S. Masson‐Meyers
- Marquette University School of DentistryMilwaukeeWisconsinUSA
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
| | - Thiago A. M. Andrade
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- Graduate Program of Biomedical SciencesUniversity Center of Herminio Ometto Foundation (FHO)ArarasSao PauloBrazil
| | - Guilherme F. Caetano
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- Graduate Program of Biomedical SciencesUniversity Center of Herminio Ometto Foundation (FHO)ArarasSao PauloBrazil
| | - Francielle R. Guimaraes
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- University Center of Associated Schools of Education (UNIFAE)São João da Boa VistaSão PauloBrazil
| | - Marcel N. Leite
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
| | - Saulo N. Leite
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
- University Center of the Educational Foundation Guaxupe (UNIFEG)GuaxupeMinas GeraisBrazil
| | - Marco Andrey C. Frade
- Division of DermatologyDepartment of Internal MedicineRibeirao Preto Medical SchoolUniversity of Sao PauloRibeirao PretoSao PauloBrazil
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Chi N, Zheng S, Clutter E, Wang R. Silk-CNT Mediated Fibroblast Stimulation toward Chronic Wound Repair. RECENT PROGRESS IN MATERIALS 2019; 1. [PMID: 32550604 PMCID: PMC7299232 DOI: 10.21926/rpm.1904007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background Diabetic patients suffer from chronic wounds partly due to altered function of fibroblasts. Fibroblasts of diabetic patients synthesize collagen I (COLI) at a much higher level than collagen III (COLIII), resulting in delayed tissue granulation and, consequently, a delay in the overall wound healing process. Methods We aimed to revive the matrix protein productivity of diabetic fibroblasts by employing aligned, electrically conductive and biocompatible spider silk-CNT fibers as a cell culture matrix to mediate the electrical stimulation of fibroblasts to induce cell polarization and activation. Results A 5.2 and 42.7 fold increase in COLI and COLIII production was induced in diabetic fibroblasts. The stimulated cells synthesized a substantially high level of COLIII to reduce the abnormally high COLI/COLIII ratio, and the matrix metalloproteinases expression was markedly suppressed. The protein expression profile was consistent with favorable wound healing. The modulation effect was also demonstrated in normal fibroblasts of healthy individuals, suggesting that the developed method can be utilized generally for connective tissue repair. Silkworm silk-CNT fibers corroborated similar effects on restoring the function of diabetic fibroblasts. Conclusions The approach of using an engineered biopolymer matrix to remedy dysfunctional fibroblasts of patients offers the opportunity of developing personalized cell therapy for noninvasive treatments and inspires the design of multi-functional biometrics for effective tissue regeneration.
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Affiliation(s)
- Naiwei Chi
- Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, USA
| | - Shuyao Zheng
- Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, USA
| | - Elwin Clutter
- Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, USA
| | - Rong Wang
- Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, USA
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Dubois SJ, Kalashnikov N, Moraes C. Robust and Precise Wounding and Analysis of Engineered Contractile Tissues. Tissue Eng Part C Methods 2019; 25:677-686. [DOI: 10.1089/ten.tec.2019.0123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Sarah J. Dubois
- Department of Chemical Engineering, McGill University, Montreal, Canada
| | | | - Christopher Moraes
- Department of Chemical Engineering, McGill University, Montreal, Canada
- Department of Biological and Biomedical Engineering, McGill University, Montreal, Canada
- Goodman Cancer Research Center, McGill University, Montreal, Canada
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Mailand E, Li B, Eyckmans J, Bouklas N, Sakar MS. Surface and Bulk Stresses Drive Morphological Changes in Fibrous Microtissues. Biophys J 2019; 117:975-986. [PMID: 31427068 PMCID: PMC6731460 DOI: 10.1016/j.bpj.2019.07.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 06/11/2019] [Accepted: 07/24/2019] [Indexed: 01/22/2023] Open
Abstract
Engineered fibrous tissues consisting of cells encapsulated within collagen gels are widely used three-dimensional in vitro models of morphogenesis and wound healing. Although cell-mediated matrix remodeling that occurs within these scaffolds has been extensively studied, less is known about the mesoscale physical principles governing the dynamics of tissue shape. Here, we show both experimentally and by using computer simulations how surface contraction through the development of surface stresses (analogous to surface tension in fluids) coordinates with bulk contraction to drive shape evolution in constrained three-dimensional microtissues. We used microelectromechanical systems technology to generate arrays of fibrous microtissues and robot-assisted microsurgery to perform local incisions and implantation. We introduce a technique based on phototoxic activation of a small molecule to selectively kill cells in a spatially controlled manner. The model simulations, which reproduced the experimentally observed shape changes after surgical and photochemical operations, indicate that fitting of only bulk and surface contractile moduli is sufficient for the prediction of the equilibrium shape of the microtissues. The computational and experimental methods we have developed provide a general framework to study and predict the morphogenic states of contractile fibrous tissues under external loading at multiple length scales.
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Affiliation(s)
- Erik Mailand
- Institute of Mechanical Engineering and Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Bin Li
- Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York
| | - Jeroen Eyckmans
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts; Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts
| | - Nikolaos Bouklas
- Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York.
| | - Mahmut Selman Sakar
- Institute of Mechanical Engineering and Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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31
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Vaughan MB, Xu G, Morris TL, Kshetri P, Herwig JX. Predictable fibroblast tension generation by measuring compaction of anchored collagen matrices using microscopy and optical coherence tomography. Cell Adh Migr 2019; 13:303-314. [PMID: 31331232 PMCID: PMC6650198 DOI: 10.1080/19336918.2019.1644855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The anchored fibroblast-populated collagen matrix (aFPCM) is an appropriate model to study fibrocontractive disease mechanisms. Our goal was to determine if aFPCM height reduction (compaction) during development is sufficient to predict tension generation. Compaction was quantified daily by both traditional light microscopy and an optical coherence tomography (OCT) system. Contraction in aFPCM was revealed by releasing them from anchorage. We found that aFPCM contraction increase was correlated to the compaction increase. Cytochalasin D treatment reversibly inhibited compaction. Therefore, we demonstrated that aFPCM height reduction efficiently measures compaction, contraction, and relative maturity of the collagen matrix during development or treatment. In addition, we showed that OCT is suitable for effectively imaging the cross-sectional morphology of the aFPCM in culture. This study will pave the way for more efficient studies on the mechanisms of (and treatments that target) migration and contraction in wound healing and Dupuytren’s contracture in a tissue environment.
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Affiliation(s)
- Melville B Vaughan
- a Department of Biology, University of Central Oklahoma , Edmond , OK , USA.,b Center for Interdisciplinary Biomedical Education and Research (CIBER), University of Central Oklahoma, 100 N. University Drive , Edmond , OK
| | - Gang Xu
- b Center for Interdisciplinary Biomedical Education and Research (CIBER), University of Central Oklahoma, 100 N. University Drive , Edmond , OK.,c Department of Engineering and Physics, University of Central Oklahoma , Edmond , OK , USA
| | - Tracy L Morris
- b Center for Interdisciplinary Biomedical Education and Research (CIBER), University of Central Oklahoma, 100 N. University Drive , Edmond , OK.,d Department of Mathematics and Statistics, University of Central Oklahoma , Edmond , OK , USA
| | - Pratiksha Kshetri
- a Department of Biology, University of Central Oklahoma , Edmond , OK , USA
| | - Jing X Herwig
- a Department of Biology, University of Central Oklahoma , Edmond , OK , USA
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Mesenchymal stromal cells contract collagen more efficiently than dermal fibroblasts: Implications for cytotherapy. PLoS One 2019; 14:e0218536. [PMID: 31306414 PMCID: PMC6629071 DOI: 10.1371/journal.pone.0218536] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 06/04/2019] [Indexed: 11/19/2022] Open
Abstract
Background Stem cell therapy is the next generation a well-established technique. Cell therapy with mesenchymal stem cells (MSC) has been demonstrated to enhance wound healing in diabetic mice, at least partly due to improved growth factor production. However, it is unclear whether MSC can biomechanically affect wound closure. Utilizing the well-established cell-populated collagen gel contraction model we investigated the interactions between MSC and the extracellular matrix. Methods Murine fetal liver-derived Mesenchymal Stem Cells (MSCs) or fetal Dermal Fibroblasts (DFs) were cultured in cell–populated collagen gels (CPCGs). The effect of cell density, conditioned media, growth factors (TGF-B1, FGF, PDGF-BB), cytoskeletal disruptors (colchicine, cytochalasin-D), and relative hypoxia on gel contraction were evaluated. Finally, we also measured the expression of integrin receptors and some growth factors by MSCs within the contracting gels. Results Our results show that at different densities, MSCs induced a higher gel contraction compared to DFs. Higher cell density resulted in faster and more complete contraction of CPCGs. Cytoskeletal inhibitors either inhibited or prevented MSC-mediated contraction in a dose dependent fashion. Growth factors, conditioned media from both MSC and DF, and hypoxia all influenced CPCG contraction. Discussion The results suggest that MSCs are capable of directly contributing to wound closure through matrix contraction, and they are more effective than DF. In addition, this study demonstrates the importance of how other factors such as cell concentration, cytokines, and oxygen tension can provide potential modulation of therapies to correct wound healing impairments.
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Pratsinis H, Mavrogonatou E, Kletsas D. Scarless wound healing: From development to senescence. Adv Drug Deliv Rev 2019; 146:325-343. [PMID: 29654790 DOI: 10.1016/j.addr.2018.04.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 03/29/2018] [Accepted: 04/09/2018] [Indexed: 12/21/2022]
Abstract
An essential element of tissue homeostasis is the response to injuries, cutaneous wound healing being the most studied example. In the adults, wound healing aims at quickly restoring the barrier function of the skin, leading however to scar, a dysfunctional fibrotic tissue. On the other hand, in fetuses a scarless tissue regeneration takes place. During ageing, the wound healing capacity declines; however, in the absence of comorbidities a higher quality in tissue repair is observed. Senescent cells have been found to accumulate in chronic unhealed wounds, but more recent reports indicate that their transient presence may be beneficial for tissue repair. In this review data on skin wound healing and scarring are presented, covering the whole spectrum from early embryonic development to adulthood, and furthermore until ageing of the organism.
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Wang XT, McKeever CC, Vonu P, Patterson C, Liu PY. Dynamic Histological Events and Molecular Changes in Excisional Wound Healing of Diabetic DB/DB Mice. J Surg Res 2019; 238:186-197. [DOI: 10.1016/j.jss.2019.01.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 12/18/2018] [Accepted: 01/17/2019] [Indexed: 01/08/2023]
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Yoon D, Yoon D, Sim H, Hwang I, Lee JS, Chun W. Accelerated Wound Healing by Fibroblasts Differentiated from Human Embryonic Stem Cell-Derived Mesenchymal Stem Cells in a Pressure Ulcer Animal Model. Stem Cells Int 2018; 2018:4789568. [PMID: 30693037 PMCID: PMC6332923 DOI: 10.1155/2018/4789568] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/04/2018] [Accepted: 09/23/2018] [Indexed: 02/07/2023] Open
Abstract
Fibroblasts synthesize and secrete dermal collagen, matrix proteins, growth factors, and cytokines. These characteristics of fibroblasts provide a potential way for fibroblast therapy to treat skin ulcers more effectively than conventional therapies such as cytokine therapy and negative pressure wound therapy. However, the obstacle to the commercialization of fibroblast therapy is the limited supply of cells with consistent quality. In this study, we tested whether human embryonic stem cell-derived mesenchymal stem cells (hESC-MSCs) could be differentiated into fibroblasts considering that they have characteristics of high differentiation rates, unlimited proliferation possibility from a single colony, and homogeneity. As a result, hESC-MSC-derived fibroblasts (hESC-MSC-Fbs) showed a significant increase in the expression of type I and III collagen, fibronectin, and fibroblast-specific protein-1 (FSP-1). Besides, vessel formation and wound healing were enhanced in hESC-MSC-Fb-treated skin tissues compared to PBS- or hESC-MSC-treated skin tissues, along with decreased IL-6 expression at 4 days after the formation of pressure ulcer wound in a mouse model. In view of the limited available cell sources for fibroblast therapy, hESC-MSC-Fbs show a promising potential as a commercial cell therapy source to treat skin ulcers.
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Affiliation(s)
- Dajeong Yoon
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Dogeon Yoon
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Heejoong Sim
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Inseok Hwang
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Ji-Seon Lee
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
| | - Wook Chun
- Burn Institute, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
- Department of Surgery, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea
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Oryan A, Jalili M, Kamali A, Nikahval B. The concurrent use of probiotic microorganism and collagen hydrogel/scaffold enhances burn wound healing: An in vivo evaluation. Burns 2018; 44:1775-1786. [DOI: 10.1016/j.burns.2018.05.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/16/2018] [Accepted: 05/16/2018] [Indexed: 01/24/2023]
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Chopin-Doroteo M, Salgado-Curiel RM, Pérez-González J, Marín-Santibáñez BM, Krötzsch E. Fibroblast populated collagen lattices exhibit opposite biophysical conditions by fibrin or hyaluronic acid supplementation. J Mech Behav Biomed Mater 2018; 82:310-319. [DOI: 10.1016/j.jmbbm.2018.03.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 02/22/2018] [Accepted: 03/30/2018] [Indexed: 12/20/2022]
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Prasad YS, Saritha B, Tamizhanban A, Lalitha K, Kabilan S, Maheswari CU, Sridharan V, Nagarajan S. Enzymatic synthesis and self-assembly of glycolipids: robust self-healing and wound closure performance of assembled soft materials. RSC Adv 2018; 8:37136-37145. [PMID: 35557831 PMCID: PMC9089313 DOI: 10.1039/c8ra07703g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 10/22/2018] [Indexed: 11/21/2022] Open
Abstract
In developing countries, wounds are a major health concern and pose a significant problem. Hence, the development of new materials that can act as scaffolds for in situ tissue regeneration and regrowth is necessary. In this report, we present a new class of injectable oleogel and composite gel derived from glycolipids that provide reversible interlinked 3D fiberous network architecture for effective wound closure by tissue regrowth and regeneration. Glycolipids were derived from α-chloralose and various vinyl esters using Novozyme 435, an immobilized lipase B from Candida antarctica as a catalyst, in good yield. These glycolipids undergo spontaneous self-assembly in paraffin oil to form an oleogel, in which curcumin was successfully incorporated to generate a composite gel. Morphological analysis of the oleogel and composite gel clearly revealed the formation of a 3D fiberous network. Rheological investigation revealed the thermal and mechanical processability of the oleogel and composite gel under various experimental conditions. Interestingly, the developed injectable oleogel and composite gel are able to accelerate the wound healing process by regulating the overlapping phases of inflammation, cell proliferation and extracellular matrix remodelling. Since chloralose displays anesthetic properties, this study will establish a new strategy to develop anesthetic wound healing oleogels in the future. In this report, we present a new class of injectable oleogels and a composite gel derived from glycolipids that provide a reversible interlinked 3D fiberous network architecture for effective wound closure by tissue regrowth and regeneration.![]()
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Affiliation(s)
- Yadavali Siva Prasad
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - Balasubramani Saritha
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - Ayyapillai Tamizhanban
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - Krishnamoorthy Lalitha
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - Sakthivel Kabilan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - C. Uma Maheswari
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences
- Central University of Jammu
- Rahya-Suchani (Bagla)
- Jammu-181143
- India
| | - Subbiah Nagarajan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA Deemed University
- Thanjavur – 613401
- India
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Despoudi K, Mantzoros I, Ioannidis O, Cheva A, Antoniou N, Konstantaras D, Symeonidis S, Pramateftakis MG, Kotidis E, Angelopoulos S, Tsalis K. Effects of albumin/glutaraldehyde glue on healing of colonic anastomosis in rats. World J Gastroenterol 2017; 23:5680-5691. [PMID: 28883693 PMCID: PMC5569282 DOI: 10.3748/wjg.v23.i31.5680] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 06/08/2017] [Accepted: 07/24/2017] [Indexed: 02/07/2023] Open
Abstract
AIM To evaluate the effect of local surgical adhesive glue (albumin/glutaraldehyde-Bioglue) on the healing of colonic anastomoses in rats.
METHODS Forty Albino-Wistar male rats were randomly divided into two groups, with two subgroups of ten animals each. In the control group, an end-to-end colonic anastomosis was performed after segmental resection. In the Bioglue group, the anastomosis was protected with extraluminar application of adhesive glue containing albumin and glutaraldehyde. Half of the rats were sacrificed on the fourth and the rest on the eighth postoperative day. Anastomoses were resected and macroscopically examined. Bursting pressures were calculated and histological features were graded. Other parameters of healing, such as hydroxyproline and collagenase concentrations, were evaluated. The experimental data were summarized and computed from the results of a one-way ANOVA. Fisher’s exact test was applied to compare percentages.
RESULTS Bursting pressures, adhesion formation, inflammatory cell infiltration, and collagen deposition were significantly higher on the fourth postoperative day in the albumin/glutaraldehyde group than in the control group. Furthermore, albumin/glutaraldehyde significantly increased adhesion formation, inflammatory cell infiltration, neoangiogenesis, and collagen deposition on the eighth postoperative day. There was no difference in fibroblast activity or hydroxyproline and collagenase concentrations.
CONCLUSION Albumin/glutaraldehyde, when applied on colonic anastomoses, promotes their healing in rats. Therefore, the application of protective local agents in colonic anastomoses leads to better outcomes.
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Affiliation(s)
- Kalliopi Despoudi
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Ioannis Mantzoros
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Orestis Ioannidis
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Aggeliki Cheva
- Department of Pathology, General Hospital “G. Papanikolaou”, 57010 Thessaloniki, Greece
| | - Nikolaos Antoniou
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Dimitrios Konstantaras
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Savvas Symeonidis
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | | | - Efstathios Kotidis
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Stamatis Angelopoulos
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
| | - Konstantinos Tsalis
- Fourth Surgical Department, Medical School, Aristotle University of Thessaloniki, 57010 Thessaloniki, Greece
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Parekh A, Hebda PA. The Contractile Phenotype of Dermal Fetal Fibroblasts in Scarless Wound Healing. CURRENT PATHOBIOLOGY REPORTS 2017; 5:271-277. [PMID: 29038745 DOI: 10.1007/s40139-017-0149-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
PURPOSE OF REVIEW Injured skin in the mammalian fetus can heal regeneratively due to the ability of fetal fibroblasts to effectively reorganize the extracellular matrix (ECM). This process occurs without fetal fibroblasts differentiating into highly contractile myofibroblasts which cause scarring and fibrosis in adult wounds. Here, we provide a brief review of fetal wound healing and the evidence supporting a unique contractile phenotype in fetal fibroblasts. Furthermore, we discuss the biomechanical role of the ECM in driving myofibroblast differentiation in wound healing and the implications for new clinical modalities based on the biophysical properties of fetal fibroblasts. RECENT FINDINGS We and others have found that fetal fibroblasts are refractory to the environmental stimuli necessary for myofibroblast differentiation in adult wound healing including mechanical stress. SUMMARY Understanding the biomechanical mechanisms that regulate the contractile phenotype of fetal fibroblasts may unlock new avenues for anti-scarring therapies that target myofibroblast differentiation of adult fibroblasts.
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Affiliation(s)
- Aron Parekh
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee, USA.,Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA.,Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Patricia A Hebda
- Department of Plastic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.,McGowan Institute for Regenerative Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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41
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Meephansan J, Rungjang A, Yingmema W, Deenonpoe R, Ponnikorn S. Effect of astaxanthin on cutaneous wound healing. Clin Cosmet Investig Dermatol 2017; 10:259-265. [PMID: 28761364 PMCID: PMC5516620 DOI: 10.2147/ccid.s142795] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Wound healing consists of a complex series of convoluted processes which involve renewal of the skin after injury. ROS are involved in all phases of wound healing. A balance between oxidative and antioxidative forces is necessary for a favorable healing outcome. Astaxanthin, a member of the xanthophyll group, is considered a powerful antioxidant. In this study, we investigated the effect of topical astaxanthin on cutaneous wound healing. Full-thickness dermal wounds were created in 36 healthy female mice, which were divided into a control group and a group receiving 78.9 µM topical astaxanthin treatment twice daily for 15 days. Astaxanthin-treated wounds showed noticeable contraction by day 3 of treatment and complete wound closure by day 9, whereas the wounds of control mice revealed only partial epithelialization and still carried scabs. Wound healing biological markers including Col1A1 and bFGF were significantly increased in the astaxanthin-treated group since day 1. Interestingly, the oxidative stress marker iNOS showed a significantly lower expression in the study. The results indicate that astaxanthin is an effective compound for accelerating wound healing.
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Affiliation(s)
- Jitlada Meephansan
- Division of Dermatology, Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
| | - Atiya Rungjang
- Division of Dermatology, Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
| | - Werayut Yingmema
- Laboratory Animal Centers, Thammasat University, Pathum Thani, Thailand
| | - Raksawan Deenonpoe
- Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
| | - Saranyoo Ponnikorn
- Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, Thailand
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42
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Bentov I, Damodarasamy M, Spiekerman C, Reed MJ. Lidocaine Impairs Proliferative and Biosynthetic Functions of Aged Human Dermal Fibroblasts. Anesth Analg 2017; 123:616-23. [PMID: 27537755 DOI: 10.1213/ane.0000000000001422] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND The aged are at increased risk of postoperative wound healing complications. Because local anesthetics are infiltrated commonly into the dermis of surgical wounds, we sought to determine whether local anesthetics adversely affect proliferative and biosynthetic functions of dermal fibroblasts. We also evaluated the effect of local anesthetics on insulin-like growth factor-1 (IGF-1) and transforming growth factor-β1 (TGF-β1), growth factors that are important regulators of wound healing. METHODS Human dermal fibroblasts (HFB) from aged and young donors were exposed to local anesthetic agents at clinically relevant concentrations. We screened the effects of lidocaine, bupivacaine, mepivacaine, and ropivacaine on proliferation of HFB. Lidocaine was most detrimental to proliferation in HFB. We then evaluated the effect of lidocaine on expression and function of the growth factors, IGF-1 and TGF-β1. Lastly, concurrent exposure to lidocaine and IGF-1 or TGF-β1 was evaluated for their effects on proliferation and expression of dermal collagens, respectively. RESULTS Lidocaine and mepivacaine inhibited proliferation in aged HFB (for lidocaine 88% of control, 95% confidence interval [CI], 80%-98%, P = .009 and for mepivacaine 90% of control, 95% CI, 81%-99%, P = .032) but not in young HFB. Ropivacaine and bupivacaine did not inhibit proliferation. Because of the clinical utility of lidocaine relative to mepivacaine, we focused on lidocaine. Lidocaine decreased proliferation in aged HFB, which was abrogated by IGF-1. Lidocaine inhibited transcripts for IGF-1 and insulin-like growth factor-1 receptor (IGF1R) in fibroblasts from aged donors (IGF-1, log2 fold-change -1.25 [42% of control, 95% CI, 19%-92%, P = .035] and IGF1R, log2 fold-change -1.00 [50% of control, 95% CI, 31%-81%, P = .014]). In contrast, lidocaine did not affect the expression of IGF-1 or IGF1R transcripts in the young HFB. Transcripts for collagen III were decreased after lidocaine exposure in aged and young HFB (log2 fold-change -1.28 [41% of control, 95% CI, 20%-83%, P = .022] in aged HFB and log2 fold-change -1.60 [33% of control, 95% CI, 15%-73%, P = .019] in young HFB). Transcripts for collagen I were decreased in aged HFB (log2 fold-change -1.82 [28% of control, 95% CI, 14%-58%, P = .006]) but not in the young HFB. Similar to the transcripts, lidocaine also inhibited the protein expression of collagen III in young and aged HFB (log2 fold-change -1.79 [29% of control, 95% CI, 18%-47%, P = .003] in young HFB and log2 fold-change -1.76 [30% of control, 95% CI, 9%-93%, P = .043] in aged HFB). The effect of lidocaine on the expression of collagen III protein was obviated by TGF-β1 in both young and aged HFB. CONCLUSIONS Our results show that lidocaine inhibits processes relevant to dermal repair in aged HFB. The detrimental responses to lidocaine are due, in part, to interactions with IGF-1 and TGF-β1.
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Affiliation(s)
- Itay Bentov
- From the *Department of Anesthesiology and Pain Medicine and †Division of Gerontology and Geriatric Medicine, Department of Medicine, Harborview Medical Center, University of Washington, Seattle, Washington; and ‡Center for Biomedical Statistics, Institute for Translational Health Sciences, University of Washington, Seattle, Washington
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Menon SN, Hall CL, McCue SW, McElwain DLS. A model for one-dimensional morphoelasticity and its application to fibroblast-populated collagen lattices. Biomech Model Mechanobiol 2017; 16:1743-1763. [PMID: 28523375 DOI: 10.1007/s10237-017-0917-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 05/03/2017] [Indexed: 11/26/2022]
Abstract
The mechanical behaviour of solid biological tissues has long been described using models based on classical continuum mechanics. However, the classical continuum theories of elasticity and viscoelasticity cannot easily capture the continual remodelling and associated structural changes in biological tissues. Furthermore, models drawn from plasticity theory are difficult to apply and interpret in this context, where there is no equivalent of a yield stress or flow rule. In this work, we describe a novel one-dimensional mathematical model of tissue remodelling based on the multiplicative decomposition of the deformation gradient. We express the mechanical effects of remodelling as an evolution equation for the effective strain, a measure of the difference between the current state and a hypothetical mechanically relaxed state of the tissue. This morphoelastic model combines the simplicity and interpretability of classical viscoelastic models with the versatility of plasticity theory. A novel feature of our model is that while most models describe growth as a continuous quantity, here we begin with discrete cells and develop a continuum representation of lattice remodelling based on an appropriate limit of the behaviour of discrete cells. To demonstrate the utility of our approach, we use this framework to capture qualitative aspects of the continual remodelling observed in fibroblast-populated collagen lattices, in particular its contraction and its subsequent sudden re-expansion when remodelling is interrupted.
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Affiliation(s)
- Shakti N Menon
- The Institute of Mathematical Sciences, CIT Campus, Taramani, Chennai, 600113, India
- School of Mathematical Sciences, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Cameron L Hall
- Mathematics Applications Consortium with Science and Industry, University of Limerick, Castletroy, Limerick, V94 T9PX, Ireland
- Oxford Centre for Industrial and Applied Mathematics, Mathematical Institute, University of Oxford, 24-29 St Giles', Oxford, OX1 3LB, UK
| | - Scott W McCue
- School of Mathematical Sciences, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
| | - D L Sean McElwain
- School of Mathematical Sciences, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, 4001, Australia
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44
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Abstract
Hypertrophic scar and contracture in burn patients is a complex process. Contributing factors include critical injury depth and activation of key cell subpopulations, including deep dermal fibroblasts, myofibroblasts, fibrocytes, and T-helper cells, which cause scarring rather than regeneration. These cells influence each other via cellular profibrotic and antifibrotic signals, which help to determine the outcome. These cells also both modify and interact with extracellular matrix of the wound, ultimately forming hypertrophic scar. Current treatments reduce hypertrophic scar formation or improve remodeling by targeting these pathways and signals.
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Affiliation(s)
- Peter O Kwan
- 2A Plastic Surgery, Kaye Edmonton Clinic, University of Alberta, 11400 University Avenue, Edmonton, Alberta T6G 1Z1, Canada
| | - Edward E Tredget
- Department of Surgery, University of Alberta, 2D2.28 WMHSC, 8440-112 Street Northwest, Edmonton, Alberta T6G 2B7, Canada.
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45
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Abstract
Cells dynamically assemble and organize into complex tissues during development, and the resulting three-dimensional (3D) arrangement of cells and their surrounding extracellular matrix in turn feeds back to regulate cell and tissue function. Recent advances in engineered cultures of cells to model 3D tissues or organoids have begun to capture this dynamic reciprocity between form and function. Here, we describe the underlying principles that have advanced the field, focusing in particular on recent progress in using mechanical constraints to recapitulate the structure and function of musculoskeletal tissues.
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Affiliation(s)
- Jeroen Eyckmans
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, MA 02215, USA .,The Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Christopher S Chen
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, MA 02215, USA .,The Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
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46
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Hoshika Y, Takahashi F, Togo S, Hashimoto M, Nara T, Kobayashi T, Nurwidya F, Kataoka H, Kurihara M, Kobayashi E, Ebana H, Kikkawa M, Ando K, Nishino K, Hino O, Takahashi K, Seyama K. Haploinsufficiency of the folliculin gene leads to impaired functions of lung fibroblasts in patients with Birt-Hogg-Dubé syndrome. Physiol Rep 2016; 4:4/21/e13025. [PMID: 27905298 PMCID: PMC5112502 DOI: 10.14814/phy2.13025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 10/07/2016] [Accepted: 10/10/2016] [Indexed: 12/28/2022] Open
Abstract
Birt–Hogg–Dubé syndrome (BHDS) is an autosomal dominant inherited disorder caused by germline mutations in the FLCN gene, and characterized by skin fibrofolliculomas, multiple lung cysts, spontaneous pneumothorax, and renal neoplasms. Pulmonary manifestations frequently develop earlier than other organ involvements, prompting a diagnosis of BHDS. However, the mechanism of lung cyst formation and pathogenesis of pneumothorax have not yet been clarified. Fibroblasts were isolated from lung tissues obtained from patients with BHDS (n = 12) and lung cancer (n = 10) as controls. The functional abilities of these lung fibroblasts were evaluated by the tests for chemotaxis to fibronectin and three‐dimensional (3‐D) gel contraction. Fibroblasts from BHDS patients showed diminished chemotaxis as compared with fibroblasts from controls. Expression of fibronectin and TGF‐β1 was significantly reduced in BHDS fibroblasts when assessed by qPCR. Addition of TGF‐β1 in culture medium of BHDS lung fibroblasts significantly restored these cells' abilities of chemotaxis and gel contraction. Human fetal lung fibroblasts (HFL‐1) exhibited reduced chemotaxis and 3‐D gel contraction when FLCN expression was knocked down. To the contrary, a significant increase in chemotactic activity toward to fibronectin was demonstrated when wild‐type FLCN was overexpressed, whereas transduction of mutant FLCN showed no effect on chemotaxis. Our results suggest that FLCN is associated with chemotaxis in lung fibroblasts. Together with reduced TGF‐β1 expression by BHDS lung fibroblasts, a state of FLCN haploinsufficiency may cause lung fibroblast dysfunction, thereby impairing tissue repair. These may reveal one mechanism of lung cyst formation and pneumothorax in BHDS patients.
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Affiliation(s)
- Yoshito Hoshika
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan.,The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan
| | - Fumiyuki Takahashi
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Shinsaku Togo
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Muneaki Hashimoto
- Department of Molecular and Cellular Parasitology, Juntendo University School of Medicine, Tokyo, Japan
| | - Takeshi Nara
- Department of Molecular and Cellular Parasitology, Juntendo University School of Medicine, Tokyo, Japan
| | - Toshiyuki Kobayashi
- Department of Pathology and Oncology, Juntendo University School of Medicine, Tokyo, Japan
| | - Fariz Nurwidya
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Hideyuki Kataoka
- The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan.,Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan
| | - Masatoshi Kurihara
- The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan.,Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan
| | - Etsuko Kobayashi
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan.,The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan
| | - Hiroki Ebana
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan.,The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan
| | - Mika Kikkawa
- Biomedical Research Center, Laboratory of Proteomics and Biomolecular Science, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Katsutoshi Ando
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan.,The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan
| | - Koichi Nishino
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Okio Hino
- Department of Pathology and Oncology, Juntendo University School of Medicine, Tokyo, Japan
| | - Kazuhisa Takahashi
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan
| | - Kuniaki Seyama
- Divisions of Respiratory Medicine, Juntendo University Faculty of Medicine and Graduate School of Medicine, Tokyo, Japan .,The Study Group of Pneumothorax and Cystic Lung Diseases, Tokyo, Japan
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Laghezza Masci V, Taddei AR, Gambellini G, Giorgi F, Fausto AM. Microvesicles shed from fibroblasts act as metalloproteinase carriers in a 3-D collagen matrix. J Circ Biomark 2016; 5:1849454416663660. [PMID: 28936262 PMCID: PMC5548308 DOI: 10.1177/1849454416663660] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Accepted: 05/30/2016] [Indexed: 12/29/2022] Open
Abstract
This study shows that fibroblasts migrating into a collagen matrix release numerous microvesicles into the surrounding medium. By spreading in regions of the matrix far distant from cells of origin, microvesicles carry metalloproteinase 9 (MMP-9) to act upon the collagen fibrils. As a result, the collagen matrix is gradually transformed from a laminar to a fibrillar type of architecture. As shown by western blots and gelatin zymography, MMP-9 is secreted as a 92 kDa precursor and activated upon release of 82 kDa product into the culture medium. Activation is more efficient under three-dimensional than in two-dimensional culturing conditions. While MMP-9 labeling is associated with intraluminal vesicles clustered inside the microvesicles, the microvesicle's integrin β1 marker is bound to the outer membrane. The intraluminal vesicles are recruited from the cortical cytoplasm and eventually released following uploading inside the microvesicle. Here, we propose that fusion of the intraluminal vesicles with the outer microvesicle's membrane could work as a mechanism controlling the extent to which MMP-9 is first activated and then released extracellularly.
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Affiliation(s)
- Valentina Laghezza Masci
- Department of Innovation in Biological, Agrifood and Forestry Systems (DIBAF), Tuscia University, Viterbo, Italy
| | - Anna Rita Taddei
- Section of Electron Microscopy, Great Equipment Center, Tuscia University, Viterbo, Italy
| | - Gabriella Gambellini
- Section of Electron Microscopy, Great Equipment Center, Tuscia University, Viterbo, Italy
| | | | - Anna Maria Fausto
- Department of Innovation in Biological, Agrifood and Forestry Systems, Tuscia University, Viterbo, Italy
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48
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Hogrebe NJ, Reinhardt JW, Gooch KJ. Biomaterial microarchitecture: a potent regulator of individual cell behavior and multicellular organization. J Biomed Mater Res A 2016; 105:640-661. [DOI: 10.1002/jbm.a.35914] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Revised: 08/17/2016] [Accepted: 09/02/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Nathaniel J. Hogrebe
- Department of Biomedical EngineeringThe Ohio State University270 Bevis Hall 1080 Carmack RdColumbus Ohio43210
| | - James W. Reinhardt
- Department of Biomedical EngineeringThe Ohio State University270 Bevis Hall 1080 Carmack RdColumbus Ohio43210
| | - Keith J. Gooch
- Department of Biomedical EngineeringThe Ohio State University270 Bevis Hall 1080 Carmack RdColumbus Ohio43210
- The Ohio State University, Davis Heart Lung Research Institute473 W 12th AveColumbus Ohio43210
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Roberts MA, Tran D, Coulombe KL, Razumova M, Regnier M, Murry CE, Zheng Y. Stromal Cells in Dense Collagen Promote Cardiomyocyte and Microvascular Patterning in Engineered Human Heart Tissue. Tissue Eng Part A 2016; 22:633-44. [PMID: 26955856 PMCID: PMC4840925 DOI: 10.1089/ten.tea.2015.0482] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 02/29/2016] [Indexed: 01/08/2023] Open
Abstract
Cardiac tissue engineering is a strategy to replace damaged contractile tissue and model cardiac diseases to discover therapies. Current cardiac and vascular engineering approaches independently create aligned contractile tissue or perfusable vasculature, but a combined vascularized cardiac tissue remains to be achieved. Here, we sought to incorporate a patterned microvasculature into engineered heart tissue, which balances the competing demands from cardiomyocytes to contract the matrix versus the vascular lumens that need structural support. Low-density collagen hydrogels (1.25 mg/mL) permit human embryonic stem cell-derived cardiomyocytes (hESC-CMs) to form a dense contractile tissue but cannot support a patterned microvasculature. Conversely, high collagen concentrations (density ≥6 mg/mL) support a patterned microvasculature, but the hESC-CMs lack cell-cell contact, limiting their electrical communication, structural maturation, and tissue-level contractile function. When cocultured with matrix remodeling stromal cells, however, hESC-CMs structurally mature and form anisotropic constructs in high-density collagen. Remodeling requires the stromal cells to be in proximity with hESC-CMs. In addition, cocultured cardiac constructs in dense collagen generate measurable active contractions (on the order of 0.1 mN/mm(2)) and can be paced up to 2 Hz. Patterned microvascular networks in these high-density cocultured cardiac constructs remain patent through 2 weeks of culture, and hESC-CMs show electrical synchronization. The ability to maintain microstructural control within engineered heart tissue enables generation of more complex features, such as cellular alignment and a vasculature. Successful incorporation of these features paves the way for the use of large scale engineered tissues for myocardial regeneration and cardiac disease modeling.
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Affiliation(s)
- Meredith A. Roberts
- Department of Bioengineering, University of Washington, Seattle, Washington
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
| | - Dominic Tran
- Department of Bioengineering, University of Washington, Seattle, Washington
| | - Kareen L.K. Coulombe
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
- Department of Pathology, University of Washington, Seattle, Washington
| | - Maria Razumova
- Department of Bioengineering, University of Washington, Seattle, Washington
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
| | - Michael Regnier
- Department of Bioengineering, University of Washington, Seattle, Washington
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
| | - Charles E. Murry
- Department of Bioengineering, University of Washington, Seattle, Washington
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
- Department of Pathology, University of Washington, Seattle, Washington
- Department of Medicine/Cardiology, University of Washington, Seattle, Washington
| | - Ying Zheng
- Department of Bioengineering, University of Washington, Seattle, Washington
- Center for Cardiovascular Biology, University of Washington, Seattle, Washington
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington
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50
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Cellular forces and matrix assembly coordinate fibrous tissue repair. Nat Commun 2016; 7:11036. [PMID: 26980715 PMCID: PMC4799373 DOI: 10.1038/ncomms11036] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 02/12/2016] [Indexed: 01/17/2023] Open
Abstract
Planar in vitro models have been invaluable tools to identify the mechanical basis of wound closure. Although these models may recapitulate closure dynamics of epithelial cell sheets, they fail to capture how a wounded fibrous tissue rebuilds its 3D architecture. Here we develop a 3D biomimetic model for soft tissue repair and demonstrate that fibroblasts ensconced in a collagen matrix rapidly close microsurgically induced defects within 24 h. Traction force microscopy and time-lapse imaging reveal that closure of gaps begins with contractility-mediated whole-tissue deformations. Subsequently, tangentially migrating fibroblasts along the wound edge tow and assemble a progressively thickening fibronectin template inside the gap that provide the substrate for cells to complete closure. Unlike previously reported mechanisms based on lamellipodial protrusions and purse-string contraction, our data reveal a mode of stromal closure in which coordination of tissue-scale deformations, matrix assembly and cell migration act together to restore 3D tissue architecture. Planar in vitro models for wound closure stress the role of lamellipodial protrusions and purse-string contraction. Here the authors develop a 3D biomimetic model for tissue repair and show a mode of stromal closure that relies on whole tissue deformations, cell migration and matrix deposition.
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