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Xu J, Lin S, Chen H, Yang G, Zhou M, Liu Y, Li A, Yin S, Jiang X. Highly Active Frozen Nanovesicles Microneedles for Senile Wound Healing via Antibacteria, Immunotherapy, and Skin Regeneration. Adv Healthc Mater 2024; 13:e2304315. [PMID: 38261729 DOI: 10.1002/adhm.202304315] [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: 12/05/2023] [Indexed: 01/25/2024]
Abstract
Senile wound healing risks a variety of health complications and makes both economic and psychological burdens on patients greatly. Poor activity of aged dermal fibroblasts (A-FBs) and local disordered immunoreaction in the deep dermis contribute to delayed wound healing. Therefore, the locally complex microenvironment in deep requires additional processing. Herein, a novel double-layer hyaluronic acid methacrylate (HAMA)/polyvinyl alcohol (PVA) microneedle patch (MNP) coated by young fibroblast-derived exosomes (Y-EXOs) (Y-EXOs@HAMA/PVA MNP) is presented for deep drug delivery, aged wound healing and immunoregulation. A spraying and freeze-drying method is applied for keeping the bioactivity of the nanovesicles. An ideal loading of Y-EXOs and enhanced strength for penetration have realized after circulation for times. The Y-EXOs@HAMA/PVA MNP shows an excellent influence on delayed wound healing of aged skin with active A-FBs, more deposition of collagen and less production of IL-17A compared with application of aged fibroblast-derived exosomes (A-EXOs). Moreover, the content microRNAs in Y-EXOs and A-EXOs are sequenced for further study. This study initiatively demonstrates that Y-EXOs have effective function on both anti-aging and anti-inflammation and Y-EXOs@HAMA/PVA MNP is expected as a novel strategy for deep drug delivery for promoting hard wound healing in aged skin in future clinical application.
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Affiliation(s)
- Jingyi Xu
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Sihan Lin
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Hongyan Chen
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Guangzheng Yang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Mingliang Zhou
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Yili Liu
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Anshuo Li
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Shi Yin
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
| | - Xinquan Jiang
- Department of Prosthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- National Center for Stomatology, National Clinical Research Center for Oral Diseases, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
- Shanghai Engineering Research Center of Advanced Dental Technology and Materials, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 639 Zhizaoju Road, Shanghai, 200011, P. R. China
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Martinez FE, Cassettaria LL, Nicolaua NC, de Barros Camargoa VM, de Almeida Chuffaa LG, Pinheiroa PFF, Padovania CR, Martinez M. Ageing decreases the healing of wounds in the skin of alcohol-preferring rats. J Wound Care 2022; 31:872-881. [PMID: 36240793 DOI: 10.12968/jowc.2022.31.10.872] [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] [Indexed: 06/16/2023]
Abstract
OBJECTIVE Alcohol consumption combined with ageing alters the healing process of the skin. We evaluated whether ageing decreases the healing of incisional wounds in the skin of Wistar rats of Universidade de Chile of variety B (UChB). METHOD A total of 20 adult rats and 20 older UChB rats, divided into two groups which underwent surgical aggression in the anterior region of the abdomen, were used: G1, adult rats (100 days old, control) with water and 10% ethanol; G2, aged rats (540 days old, experimental) with water and 10% ethanol; evaluated at 4, 7, 14 and 21 days after surgery. RESULTS Ageing did not alter the rupture force and collagen elasticity and resistance. There were increases in telomerase with the implementation of cellular senescence, in interleukin 1-alpha (IL-1α) at 14 days of healing, in epidermal growth factor (EGF) at 14 and 21 days of healing with delayed growth and development of keratinocytes, also an increase of IL-β at 4 days, and decrease in tumour necrosis factor (TNFα) at 7 days, associated with chronic scarring. There was an increase in vascular endothelial growth factor (VEGF) at 4 and 7 days, responsible for the early vessels re-establishment. There was a decrease in transforming growth factor 2-beta (TGFβ2) and β3 at 4 and 7 days of healing respectively, and estradiol at 4 days. CONCLUSION Ageing decreases the skin healing in incisional wounds in alcohol-preferring rats.
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Wilkinson HN, Reubinoff B, Shveiky D, Hardman MJ, Menachem-Zidon OB. Epithelial arginase-1 is a key mediator of age-associated delayed healing in vaginal injury. Front Endocrinol (Lausanne) 2022; 13:927224. [PMID: 36034415 PMCID: PMC9410732 DOI: 10.3389/fendo.2022.927224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 07/22/2022] [Indexed: 11/30/2022] Open
Abstract
Pelvic organ prolapse is a disorder that substantially affects the quality of life of millions of women worldwide. The greatest risk factors for prolapse are increased parity and older age, with the largest group requiring surgical intervention being post-menopausal women over 65. Due to ineffective healing in the elderly, prolapse recurrence rates following surgery remain high. Therefore, there is an urgent need to elucidate the cellular and molecular drivers of poor healing in pelvic floor dysfunction to allow effective management and even prevention. Recent studies have uncovered the importance of Arginase 1 for modulating effective healing in the skin. We thus employed novel in vitro and in vivo vaginal injury models to determine the specific role of Arginase 1 in age-related vaginal repair. Here we show, for the first time, that aged rat vaginal wounds have reduced Arginase 1 expression and delayed healing. Moreover, direct inhibition of Arginase 1 in human vaginal epithelial cells also led to delayed scratch-wound closure. By contrast, activation of Arginase 1 significantly accelerated healing in aged vaginal wounds in vivo, to rates comparable to those in young animals. Collectively, these findings reveal a new and important role for Arginase 1 in mediating effective vaginal repair. Targeting age-related Arginase 1 deficiency is a potential viable therapeutic strategy to promote vaginal healing and reduce recurrence rate after surgical repair of pelvic organ prolapse.
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Affiliation(s)
- Holly N. Wilkinson
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, United Kingdom
- *Correspondence: Ofra Ben Menachem-Zidon, ; Holly N. Wilkinson,
| | - Benjamin Reubinoff
- The Hadassah Human Embryonic Stem Cell Research Center and the Goldyne Savad Institute of Gene Therapy, Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Obstetrics and Gynecology, Hadassah – Hebrew University Medical Center, Ein Kerem, Jerusalem, Israel
| | - David Shveiky
- Department of Obstetrics and Gynecology, Hadassah – Hebrew University Medical Center, Ein Kerem, Jerusalem, Israel
- Section of Female Pelvic Medicine & Reconstructive Surgery, Department of Obstetrics & Gynecology, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Matthew J. Hardman
- Centre for Biomedicine, Hull York Medical School, University of Hull, Hull, United Kingdom
| | - Ofra Ben Menachem-Zidon
- The Hadassah Human Embryonic Stem Cell Research Center and the Goldyne Savad Institute of Gene Therapy, Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
- *Correspondence: Ofra Ben Menachem-Zidon, ; Holly N. Wilkinson,
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Goswami AG, Basu S, Shukla VK. Wound Healing in the Golden Agers: What We Know and the Possible Way Ahead. INT J LOW EXTR WOUND 2021; 21:264-271. [PMID: 34382451 DOI: 10.1177/15347346211037841] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
While "population aging" is an accomplishment that deserves acclamation, it is in itself a tremendous challenge. Age-related skin changes, impaired wound healing, and concurrent comorbidities are the deadly triad that contribute most to the development of nonhealing chronic wounds in the elderly. This imposes enormous medical, social, and financial burden. With the rising trend in the aging population, this problem is likely to exacerbate unless multidisciplinary, rapt wound care strategies are developed. The last decade was dedicated to understand the basic biology underlying the wound healing process but most in vitro and animal model studies translated poorly to human conditions. Forthcoming, the focus is on the development of diagnostic and therapeutic strategies to improve healing in this vulnerable age group. Further, understanding the complex pathobiology of cellular senescence and wound healing process is required to develop focused therapy for these "problem wounds" in the elderly.
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Affiliation(s)
| | - Somprakas Basu
- 442339All India Institute of Medical Sciences, Rishikesh, India
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Fernandez C, Burgos A, Morales D, Rosales-Rojas R, Canelo J, Vergara-Jaque A, Vieira GV, da Silva RAA, Sales KU, Conboy MJ, Bae EJ, Park KS, Torres VA, Garrido M, Cerda O, Conboy IM, Cáceres M. TMPRSS11a is a novel age-altered, tissue specific regulator of migration and wound healing. FASEB J 2021; 35:e21597. [PMID: 33908663 DOI: 10.1096/fj.202002253rrr] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 03/23/2021] [Accepted: 03/31/2021] [Indexed: 01/11/2023]
Abstract
Aging is a gradual biological process characterized by a decrease in cellular and organism functions. Aging-related processes involve changes in the expression and activity of several proteins. Here, we identified the transmembrane protease serine 11a (TMPRSS11a) as a new age-specific protein that plays an important role in skin wound healing. TMPRSS11a levels increased with age in rodent and human skin and gingival samples. Strikingly, overexpression of TMPRSS11a decreased cell migration and spreading, and inducing cellular senescence. Mass spectrometry, bioinformatics, and functional analyses revealed that TMPRSS11a interacts with integrin β1 through an RGD sequence contained within the C-terminal domain and that this motif was relevant for cell migration. Moreover, TMPRSS11a was associated with cellular senescence, as shown by overexpression and downregulation experiments. In agreement with tissue-specific expression of TMPRSS11a, shRNA-mediated downregulation of this protein improved wound healing in the skin, but not in the skeletal muscle of old mice, where TMPRSS11a is undetectable. Collectively, these findings indicate that TMPRSS11a is a tissue-specific factor relevant for wound healing, which becomes elevated with aging, promoting cellular senescence and inhibiting cell migration and skin repair.
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Affiliation(s)
- Christian Fernandez
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Andres Burgos
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Diego Morales
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Roberto Rosales-Rojas
- Center for Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, Talca, Chile
| | - Javiera Canelo
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Ariela Vergara-Jaque
- Center for Bioinformatics, Simulation and Modeling (CBSM), Faculty of Engineering, Universidad de Talca, Talca, Chile.,Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile
| | - Gabriel Viliod Vieira
- Departament of Cell and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | | | - Katiuchia Uzzun Sales
- Departament of Cell and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo, São Paulo, Brazil
| | - Michael J Conboy
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, USA
| | - Eun Ji Bae
- Department of Physiology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Kang-Sik Park
- Department of Physiology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Vicente A Torres
- Institute for Research in Dental Sciences, Faculty of Dentistry, Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago, Chile
| | - Mauricio Garrido
- Department of Conservative Dentistry, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Oscar Cerda
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile.,The Wound Repair, Treatment and Health (WoRTH) Initiative, Santiago, Chile
| | - Irina M Conboy
- Department of Bioengineering and QB3 Institute, University of California, Berkeley, CA, USA
| | - Mónica Cáceres
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channel-Associated Diseases (MiNICAD), Santiago, Chile.,The Wound Repair, Treatment and Health (WoRTH) Initiative, Santiago, Chile
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Azad TD, Varshneya K, Herrick DB, Pendharkar AV, Ho AL, Stienen M, Zygourakis C, Bagshaw HP, Veeravagu A, Ratliff JK, Desai A. Timing of Adjuvant Radiation Therapy and Risk of Wound-Related Complications Among Patients With Spinal Metastatic Disease. Global Spine J 2021; 11:44-49. [PMID: 32875859 PMCID: PMC7734271 DOI: 10.1177/2192568219889363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
STUDY DESIGN This was an epidemiological study using national administrative data from the MarketScan database. OBJECTIVE To investigate the impact of early versus delayed adjuvant radiotherapy (RT) on wound healing following surgical resection for spinal metastatic disease. METHODS We queried the MarketScan database (2007-2016), identifying patients with a diagnosis of spinal metastasis who also underwent RT within 8 weeks of surgery. Patients were categorized into "Early RT" if they received RT within 4 weeks of surgery and as "Late RT" if they received RT between 4 and 8 weeks after surgery. Descriptive statistics and hypothesis testing were used to compare baseline characteristics and wound complication outcomes. RESULTS A total of 540 patients met the inclusion criteria: 307 (56.9%) received RT within 4 weeks (Early RT) and 233 (43.1%) received RT within 4 to 8 weeks (Late RT) of surgery. Mean days to RT for the Early RT cohort was 18.5 (SD, 6.9) and 39.7 (SD, 7.6) for the Late RT cohort. In a 90-day surveillance period, n = 9 (2.9%) of Early RT and n = 8 (3.4%) of Late RT patients developed wound complications (P = .574). CONCLUSIONS When comparing patients who received RT early versus delayed following surgery, there were no significant differences in the rates of wound complications. Further prospective studies should aim to identify optimal patient criteria for early postoperative RT for spinal metastases.
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Affiliation(s)
- Tej D. Azad
- Stanford University School of Medicine, Stanford, CA, USA
- Tej D. Azad and Kunal Varshneya contributed equally toward this study
| | - Kunal Varshneya
- Stanford University School of Medicine, Stanford, CA, USA
- Tej D. Azad and Kunal Varshneya contributed equally toward this study
| | | | | | - Allen L. Ho
- Stanford University School of Medicine, Stanford, CA, USA
| | - Martin Stienen
- Stanford University School of Medicine, Stanford, CA, USA
| | | | | | | | | | - Atman Desai
- Stanford University School of Medicine, Stanford, CA, USA
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Paterson YZ, Evans N, Kan S, Cribbs A, Henson FMD, Guest DJ. The transcription factor scleraxis differentially regulates gene expression in tenocytes isolated at different developmental stages. Mech Dev 2020; 163:103635. [PMID: 32795590 DOI: 10.1016/j.mod.2020.103635] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/21/2020] [Accepted: 07/27/2020] [Indexed: 01/01/2023]
Abstract
The transcription factor scleraxis (SCX) is expressed throughout tendon development and plays a key role in directing tendon wound healing. However, little is known regarding its role in fetal or young postnatal tendons, stages in development that are known for their enhanced regenerative capabilities. Here we used RNA-sequencing to compare the transcriptome of adult and fetal tenocytes following SCX knockdown. SCX knockdown had a larger effect on gene expression in fetal tenocytes, affecting 477 genes in comparison to the 183 genes affected in adult tenocytes, indicating that scleraxis-dependent processes may differ in these two developmental stages. Gene ontology, network and pathway analysis revealed an overrepresentation of extracellular matrix (ECM) remodelling processes within both comparisons. These included several matrix metalloproteinases, proteoglycans and collagens, some of which were also investigated in SCX knockdown tenocytes from young postnatal foals. Using chromatin immunoprecipitation, we also identified novel genes that SCX differentially interacts with in adult and fetal tenocytes. These results indicate a role for SCX in modulating ECM synthesis and breakdown and provide a useful dataset for further study into SCX gene regulation.
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Affiliation(s)
- Y Z Paterson
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK; Centre for Preventive Medicine, Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, UK.
| | - N Evans
- Centre for Preventive Medicine, Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, UK.
| | - S Kan
- Centre for Preventive Medicine, Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, UK.
| | - A Cribbs
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford OX3 7LD, UK.
| | - F M D Henson
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK; Centre for Preventive Medicine, Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, UK.
| | - D J Guest
- Centre for Preventive Medicine, Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk CB8 7UU, UK; Deptartment of Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK.
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Terlecki-Zaniewicz L, Pils V, Bobbili MR, Lämmermann I, Perrotta I, Grillenberger T, Schwestka J, Weiß K, Pum D, Arcalis E, Schwingenschuh S, Birngruber T, Brandstetter M, Heuser T, Schosserer M, Morizot F, Mildner M, Stöger E, Tschachler E, Weinmüllner R, Gruber F, Grillari J. Extracellular Vesicles in Human Skin: Cross-Talk from Senescent Fibroblasts to Keratinocytes by miRNAs. J Invest Dermatol 2019; 139:2425-2436.e5. [PMID: 31220456 DOI: 10.1016/j.jid.2019.05.015] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/09/2019] [Accepted: 05/24/2019] [Indexed: 12/27/2022]
Abstract
Extracellular vesicles (EVs) and their miRNA cargo are intercellular communicators transmitting their pleiotropic messages between different cell types, tissues, and body fluids. Recently, they have been reported to contribute to skin homeostasis and were identified as members of the senescence-associated secretory phenotype of human dermal fibroblasts. However, the role of EV-miRNAs in paracrine signaling during skin aging is yet unclear. Here we provide evidence for the existence of small EVs in the human skin and dermal interstitial fluid using dermal open flow microperfusion and show that EVs and miRNAs are transferred from dermal fibroblasts to epidermal keratinocytes in 2D cell culture and in human skin equivalents. We further show that the transient presence of senescent fibroblast derived small EVs accelerates scratch closure of epidermal keratinocytes, whereas long-term incubation impairs keratinocyte differentiation in vitro. Finally, we identify vesicular miR-23a-3p, highly secreted by senescent fibroblasts, as one contributor of the EV-mediated effect on keratinocytes in in vitro wound healing assays. To summarize, our findings support the current view that EVs and their miRNA cargo are members of the senescence-associated secretory phenotype and, thus, regulators of human skin homeostasis during aging.
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Affiliation(s)
- Lucia Terlecki-Zaniewicz
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Vera Pils
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | | | - Ingo Lämmermann
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Ida Perrotta
- Department of Biology, Ecology and Earth Sciences, University of Calabria, Cosenza, Italy
| | - Tonja Grillenberger
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Jennifer Schwestka
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Katrin Weiß
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Dietmar Pum
- Department of Nanobiotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Elsa Arcalis
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Simon Schwingenschuh
- HEALTH - Institut für Biomedizin und Gesundheitswissenschaften, Joanneum Research, Graz, Austria
| | - Thomas Birngruber
- HEALTH - Institut für Biomedizin und Gesundheitswissenschaften, Joanneum Research, Graz, Austria
| | | | - Thomas Heuser
- Vienna BioCenter Core Facilities GmbH, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Markus Schosserer
- Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | | | - Michael Mildner
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Eva Stöger
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Erwin Tschachler
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Regina Weinmüllner
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Florian Gruber
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Johannes Grillari
- Christian Doppler Laboratory for Biotechnology of Skin Aging, Vienna, Austria; Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Austria; Austrian Cluster for Tissue Regeneration, Vienna, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.
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Kumar N, Reddi S, Devi S, Mada SB, Kapila R, Kapila S. Nrf2 dependent antiaging effect of milk‐derived bioactive peptide in old fibroblasts. J Cell Biochem 2018; 120:9677-9691. [DOI: 10.1002/jcb.28246] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 11/16/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Naveen Kumar
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
| | - Srinu Reddi
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
| | - Savita Devi
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
| | - Sanusi Bello Mada
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
- Department of Biochemistry Ahmadu Bello University Zaria Nigeria
| | - Rajeev Kapila
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
| | - Suman Kapila
- Animal Biochemistry Division ICAR‐National Dairy Research Institute Karnal India
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10
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Shook BA, Wasko RR, Rivera Gonzalez GC, Salazar-Gatzimas E, López-Giráldez F, Dash BC, Muñoz-Rojas AR, Aultman KD, Zwick RK, Lei V, Arbiser JL, Miller-Jensen K, Clark DA, Hsia HC, Horsley V. Myofibroblast proliferation and heterogeneity are supported by macrophages during skin repair. Science 2018; 362:362/6417/eaar2971. [PMID: 30467144 PMCID: PMC6684198 DOI: 10.1126/science.aar2971] [Citation(s) in RCA: 277] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 07/20/2018] [Accepted: 10/04/2018] [Indexed: 12/20/2022]
Abstract
During tissue repair, myofibroblasts produce extracellular matrix (ECM) molecules for tissue resilience and strength. Altered ECM deposition can lead to tissue dysfunction and disease. Identification of distinct myofibroblast subsets is necessary to develop treatments for these disorders. We analyzed profibrotic cells during mouse skin wound healing, fibrosis, and aging and identified distinct subpopulations of myofibroblasts, including adipocyte precursors (APs). Multiple mouse models and transplantation assays demonstrate that proliferation of APs but not other myofibroblasts is activated by CD301b-expressing macrophages through insulin-like growth factor 1 and platelet-derived growth factor C. With age, wound bed APs and differential gene expression between myofibroblast subsets are reduced. Our findings identify multiple fibrotic cell populations and suggest that the environment dictates functional myofibroblast heterogeneity, which is driven by fibroblast-immune interactions after wounding.
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Affiliation(s)
- Brett A. Shook
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA,Corresponding Author. (B.A.S.); (V.H.)
| | - Renee R. Wasko
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | | | | | | | - Biraja C. Dash
- Department of Surgery (Plastic), Yale School of Medicine, New Haven, CT 06510, USA
| | | | - Krystal D. Aultman
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Rachel K. Zwick
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Vivian Lei
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Jack L. Arbiser
- Department of Dermatology, Atlanta Veterans Administration Health Center, Emory University, Atlanta, GA 30322, USA
| | - Kathryn Miller-Jensen
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA,Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
| | - Damon A. Clark
- Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06511, USA
| | - Henry C. Hsia
- Department of Surgery (Plastic), Yale School of Medicine, New Haven, CT 06510, USA
| | - Valerie Horsley
- Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511, USA. .,Department of Dermatology, Yale University, New Haven, CT 06511, USA
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11
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Should open excisions and sutured incisions be treated differently? A review and meta-analysis of animal wound models following low-level laser therapy. Lasers Med Sci 2018; 33:1351-1362. [PMID: 29603108 DOI: 10.1007/s10103-018-2496-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 03/23/2018] [Indexed: 12/20/2022]
Abstract
Although low-level laser therapy (LLLT) was discovered already in the 1960s of the twentieth century, it took almost 40 years to be widely used in clinical dermatology/surgery. It has been demonstrated that LLLT is able to increase collagen production/wound stiffness and/or improve wound contraction. In this review, we investigated whether open and sutured wounds should be treated with different LLLT parameters. A PubMed search was performed to identify controlled studies with LLLT applied to wounded animals (sutured incisions-tensile strength measurement and open excisions-area measurement). Final score random effects meta-analyses were conducted. Nineteen studies were included. The overall result of the tensile strength analysis (eight studies) was significantly in favor of LLLT (SMD = 1.06, 95% CI 0.66-1.46), and better results were seen with 30-79 mW/cm2 infrared laser (SMD = 1.44, 95% CI 0.67-2.21) and 139-281 mW/cm2 red laser (SMD = 1.52, 95% CI 0.54-2.49). The overall result of the wound contraction analysis (11 studies) was significantly in favor of LLLT (SMD = 0.99, 95% CI 0.38-1.59), and the best results were seen with 53-300 mW/cm2 infrared laser (SMD = 1.18, 95% CI 0.41-1.94) and 25-90 mW/cm2 red laser (SMD = 1.6, 95% CI 0.27-2.93). Whereas 1-15 mW/cm2 red laser had a moderately positive effect on sutured wounds, 2-4 mW/cm2 red laser did not accelerate healing of open wounds. LLLT appears effective in the treatment of sutured and open wounds. Statistical heterogeneity indicates that the tensile strength development of sutured wounds is more dependent on laser power density compared to the contraction rate of open wounds.
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12
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Avishai E, Yeghiazaryan K, Golubnitschaja O. Impaired wound healing: facts and hypotheses for multi-professional considerations in predictive, preventive and personalised medicine. EPMA J 2017; 8:23-33. [PMID: 28620441 PMCID: PMC5471802 DOI: 10.1007/s13167-017-0081-y] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 01/29/2017] [Indexed: 12/14/2022]
Abstract
Whereas the physiologic wound healing (WH) successfully proceeds through the clearly defined sequence of the individual phases of wound healing, chronic non-healing wounds/ulcers fail to complete the individual stages and the entire healing process. There are many risk factors both modifiable (such as stress, smoking, inappropriate alcohol consumption, malnutrition, obesity, diabetes, cardio-vascular disease, etc.) and non-modifiable (such as genetic diseases and ageing) strongly contributing to the impaired WH. Current statistics demonstrate that both categories are increasingly presented in the populations, which causes dramatic socio-economic burden to the healthcare sector and society at large. Consequently, innovative concepts by predictive, preventive and personalised medicine are crucial to be implemented in the area. Individual risk factors, causality, functional interrelationships, molecular signature, predictive diagnosis, and primary and secondary prevention are thoroughly analysed followed by the expert recommendations in this paper.
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Affiliation(s)
- Eden Avishai
- Rappaport Faculty of Medicine, Technion, Haifa, Israel
| | - Kristina Yeghiazaryan
- Radiological Clinic, Medical Faculty, Friedrich-Wilhels-University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany
| | - Olga Golubnitschaja
- Radiological Clinic, Medical Faculty, Friedrich-Wilhels-University of Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany
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13
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Kim DJ, Mustoe T, Clark RAF. Cutaneous wound healing in aging small mammals: a systematic review. Wound Repair Regen 2016; 23:318-39. [PMID: 25817246 DOI: 10.1111/wrr.12290] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 03/27/2015] [Accepted: 03/27/2015] [Indexed: 12/31/2022]
Abstract
As the elderly population grows, so do the clinical and socioeconomic burdens of nonhealing cutaneous wounds, the majority of which are seen among persons over 60 years of age. Human studies on how aging effects wound healing will always be the gold standard, but studies have ethical and practical hurdles. Choosing an animal model is dictated by costs and animal lifespan that preclude large animal use. Here, we review the current literature on how aging effects cutaneous wound healing in small animal models and, when possible, compare healing across studies. Using a literature search of MEDLINE/PubMed databases, studies were limited to those that utilized full-thickness wounds and compared the wound-healing parameters of wound closure, reepithelialization, granulation tissue fill, and tensile strength between young and aged cohorts. Overall, wound closure, reepithelialization, and granulation tissue fill were delayed or decreased with aging across different strains of mice and rats. Aging in mice was associated with lower tensile strength early in the wound healing process, but greater tensile strength later in the wound healing process. Similarly, aging in rats was associated with lower tensile strength early in the wound healing process, but no significant tensile strength difference between young and old rats later in healing wounds. From studies in New Zealand White rabbits, we found that reepithelialization and granulation tissue fill were delayed or decreased overall with aging. While similarities and differences in key wound healing parameters were noted between different strains and species, the comparability across the studies was highly questionable, highlighted by wide variability in experimental design and reporting. In future studies, standardized experimental design and reporting would help to establish comparable study groups, and advance the overall knowledge base, facilitating the translatability of animal data to the human clinical condition.
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Affiliation(s)
- Dong Joo Kim
- School of Medicine, Department of Dermatology, Stony Brook University, Stony Brook, New York
| | - Thomas Mustoe
- Division of Plastic and Reconstructive Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Richard A F Clark
- Department of Dermatology, Stony Brook University, Stony Brook, New York, and.,Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York
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14
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de Campos Peseto D, Carmona EV, Silva KCD, Guedes FRV, Hummel Filho F, Martinez NP, Pereira JA, Rocha T, Priolli DG. Effects of tretinoin on wound healing in aged skin. Wound Repair Regen 2016; 24:411-7. [DOI: 10.1111/wrr.12417] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 01/23/2016] [Indexed: 10/22/2022]
Affiliation(s)
| | | | | | | | | | | | - José Aires Pereira
- Sao Francisco University Medical School; Bragança Paulista Sao Paulo Brazil
| | - Thalita Rocha
- Sao Francisco University Medical School; Bragança Paulista Sao Paulo Brazil
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15
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Stem Cells for Cutaneous Wound Healing. BIOMED RESEARCH INTERNATIONAL 2015; 2015:285869. [PMID: 26137471 PMCID: PMC4468276 DOI: 10.1155/2015/285869] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 03/20/2015] [Indexed: 01/08/2023]
Abstract
Optimum healing of a cutaneous wound involves a well-orchestrated cascade of biological and molecular processes involving cell migration, proliferation, extracellular matrix deposition, and remodelling. When the normal biological process fails for any reason, this healing process can stall resulting in chronic wounds. Wounds are a growing clinical burden on healthcare systems and with an aging population as well as increasing incidences of obesity and diabetes, this problem is set to increase. Cell therapies may be the solution. A range of cell based approaches have begun to cross the rift from bench to bedside and the supporting data suggests that the appropriate administration of stem cells can accelerate wound healing. This review examines the main cell types explored for cutaneous wound healing with a focus on clinical use. The literature overwhelmingly suggests that cell therapies can help to heal cutaneous wounds when used appropriately but we are at risk of clinical use outpacing the evidence. There is a need, now more than ever, for standardised methods of cell characterisation and delivery, as well as randomised clinical trials.
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16
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Gould L, Abadir P, Brem H, Carter M, Conner-Kerr T, Davidson J, DiPietro L, Falanga V, Fife C, Gardner S, Grice E, Harmon J, Hazzard WR, High KP, Houghton P, Jacobson N, Kirsner RS, Kovacs EJ, Margolis D, McFarland Horne F, Reed MJ, Sullivan DH, Thom S, Tomic-Canic M, Walston J, Whitney JA, Williams J, Zieman S, Schmader K. Chronic wound repair and healing in older adults: current status and future research. J Am Geriatr Soc 2015; 63:427-38. [PMID: 25753048 DOI: 10.1111/jgs.13332] [Citation(s) in RCA: 175] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Older adults are more likely to have chronic wounds than younger people, and the effect of chronic wounds on quality of life is particularly profound in this population. Wound healing slows with age, but the basic biology underlying chronic wounds and the influence of age-associated changes on wound healing are poorly understood. Most studies have used in vitro approaches and various animal models, but observed changes translate poorly to human healing conditions. The effect of age and accompanying multimorbidity on the effectiveness of existing and emerging treatment approaches for chronic wounds is also unknown, and older adults tend to be excluded from randomized clinical trials. Poorly defined outcomes and variables; lack of standardization in data collection; and variations in the definition, measurement, and treatment of wounds also hamper clinical studies. The Association of Specialty Professors, in conjunction with the National Institute on Aging and the Wound Healing Society, held a workshop, summarized in this article, to explore the current state of knowledge and research challenges, engage investigators across disciplines, and identify research questions to guide future study of age-associated changes in chronic wound healing.
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Affiliation(s)
- Lisa Gould
- Wound Recovery and Hyperbaric Medicine Center, Kent Hospital, Warwick, Rhode Island
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17
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Gould L, Abadir P, Brem H, Carter M, Conner-Kerr T, Davidson J, DiPietro L, Falanga V, Fife C, Gardner S, Grice E, Harmon J, Hazzard WR, High KP, Houghton P, Jacobson N, Kirsner RS, Kovacs EJ, Margolis D, McFarland Horne F, Reed MJ, Sullivan DH, Thom S, Tomic-Canic M, Walston J, Whitney J, Williams J, Zieman S, Schmader K. Chronic wound repair and healing in older adults: current status and future research. Wound Repair Regen 2015; 23:1-13. [PMID: 25486905 DOI: 10.1111/wrr.12245] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 11/19/2014] [Indexed: 12/21/2022]
Abstract
The incidence of chronic wounds is increased among older adults, and the impact of chronic wounds on quality of life is particularly profound in this population. It is well established that wound healing slows with age. However, the basic biology underlying chronic wounds and the influence of age-associated changes on wound healing are poorly understood. Most studies have used in vitro approaches and various animal models, but observed changes translate poorly to human healing conditions. The impact of age and accompanying multi-morbidity on the effectiveness of existing and emerging treatment approaches for chronic wounds is also unknown, and older adults tend to be excluded from randomized clinical trials. Poorly defined outcomes and variables, lack of standardization in data collection, and variations in the definition, measurement, and treatment of wounds also hamper clinical studies. The Association of Specialty Professors, in conjunction with the National Institute on Aging and the Wound Healing Society, held a workshop, summarized in this paper, to explore the current state of knowledge and research challenges, engage investigators across disciplines, and identify key research questions to guide future study of age-associated changes in chronic wound healing.
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Affiliation(s)
- Lisa Gould
- Wound Recovery and Hyperbaric Medicine Center, Kent Hospital, Warwick, Rhode Island
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18
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Samaras SE, Almodóvar-García K, Wu N, Yu F, Davidson JM. Global deletion of Ankrd1 results in a wound-healing phenotype associated with dermal fibroblast dysfunction. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 185:96-109. [PMID: 25452119 DOI: 10.1016/j.ajpath.2014.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/14/2014] [Accepted: 09/19/2014] [Indexed: 12/27/2022]
Abstract
The expression of ankyrin repeat domain protein 1 (Ankrd1), a transcriptional cofactor and sarcomeric component, is strongly elevated by wounding and tissue injury. We developed a conditional Ankrd1(fl/fl) mouse, performed global deletion with Sox2-cre, and assessed the role of this protein in cutaneous wound healing. Although global deletion of Ankrd1 did not affect mouse viability or development, Ankrd1(-/-) mice had at least two significant wound-healing phenotypes: extensive necrosis of ischemic skin flaps, which was reversed by adenoviral expression of ANKRD1, and delayed excisional wound closure, which was characterized by decreased contraction and reduced granulation tissue thickness. Skin fibroblasts isolated from Ankrd1(-/-) mice did not spread or migrate on collagen- or fibronectin-coated surfaces as efficiently as fibroblasts isolated from Ankrd1(fl/fl) mice. More important, Ankrd1(-/-) fibroblasts failed to contract three-dimensional floating collagen gels. Reconstitution of ANKRD1 by adenoviral infection stimulated both collagen gel contraction and actin fiber organization. These in vitro data were consistent with in vivo wound closure studies, and suggest that ANKRD1 is important for the proper interaction of fibroblasts with a compliant collagenous matrix both in vitro and in vivo.
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Affiliation(s)
- Susan E Samaras
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Karinna Almodóvar-García
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Nanjun Wu
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Fang Yu
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Jeffrey M Davidson
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee; Research Service, Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee.
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19
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Cáceres M, Oyarzun A, Smith PC. Defective Wound-healing in Aging Gingival Tissue. J Dent Res 2014; 93:691-7. [PMID: 24776985 DOI: 10.1177/0022034514533126] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 04/04/2014] [Indexed: 11/17/2022] Open
Abstract
Aging may negatively affect gingival wound-healing. However, little is known about the mechanisms underlying this phenomenon. The present study examined the cellular responses associated with gingival wound-healing in aging. Primary cultures of human gingival fibroblasts were obtained from healthy young and aged donors for the analysis of cell proliferation, cell invasion, myofibroblastic differentiation, and collagen gel remodeling. Serum from young and old rats was used to stimulate cell migration. Gingival repair was evaluated in Sprague-Dawley rats of different ages. Data were analyzed by the Mann-Whitney and Kruskal-Wallis tests, with a p value of .05. Fibroblasts from aged donors showed a significant decrease in cell proliferation, migration, Rac activation, and collagen remodeling when compared with young fibroblasts. Serum from young rats induced higher cell migration when compared with serum from old rats. After TGF-beta1 stimulation, both young and old fibroblasts demonstrated increased levels of alpha-SMA. However, alpha-SMA was incorporated into actin stress fibers in young but not in old fibroblasts. After 7 days of repair, a significant delay in gingival wound-healing was observed in old rats. The present study suggests that cell migration, myofibroblastic differentiation, collagen gel remodeling, and proliferation are decreased in aged fibroblasts. In addition, altered cell migration in wound-healing may be attributable not only to cellular defects but also to changes in serum factors associated with the senescence process.
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Affiliation(s)
- M Cáceres
- Molecular and Cell Biology Program, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - A Oyarzun
- Faculty of Dentistry, Universidad Finis Terrae, Santiago, Chile
| | - P C Smith
- School of Dentistry, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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20
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Ebaid H. Neutrophil depletion in the early inflammatory phase delayed cutaneous wound healing in older rats: improvements due to the use of un-denatured camel whey protein. Diagn Pathol 2014; 9:46. [PMID: 24593823 PMCID: PMC3944227 DOI: 10.1186/1746-1596-9-46] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 02/08/2014] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND While it is known that advanced age alters the recruitment of neutrophils during wound healing, thereby delaying the wound healing process, little is known about prolonged wound healing in advanced ages. Thus, we investigated the correlation of neutrophil recruitment with healing events, and the impact of whey protein (WP) on neutrophil activation. METHODS The animals were allocated into wounded young group, wounded older group and wounded older rats with daily treatment of WP at a dose of 100 mg/kg of body weight. RESULTS Our results pointed to a marked deficiency in the number of neutrophils in the wounds of older rats, which was accompanied with impairment of the healing process. In the group of older rats, phagocytic activity, as tested by fluorescence microscopy, declined throughout the first 24 hours after wounding. Both the neutrophil number and the phagocytic activity recovered in older rats which received WP supplementation. Interestingly, WP was found to significantly up-regulate the MIP-1α and CINC-1 mRNA expression in old rats. On the other hand, the wound size in older rats was significantly higher than that in younger ones. Blood angiogenesis was also significantly delayed in the older group as opposed to the young rats. WP, however, was found to return these indices to normal levels in the older rats. Proliferation and epidermal migration of the keratinocytes and the collagen deposition were also returned to the normal rates. CONCLUSIONS This data confirms the critical role of neutrophil recruitment in the early inflammatory phase of wound healing in older rats. In addition, WP protein was used to improve neutrophil function in older rats, healing events returned to a more normal profile. VIRTUAL SLIDES The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2100966986117779.
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Affiliation(s)
- Hossam Ebaid
- Department of Zoology, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia.
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21
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Li X, Upadhyay AK, Bullock AJ, Dicolandrea T, Xu J, Binder RL, Robinson MK, Finlay DR, Mills KJ, Bascom CC, Kelling CK, Isfort RJ, Haycock JW, MacNeil S, Smallwood RH. Skin stem cell hypotheses and long term clone survival--explored using agent-based modelling. Sci Rep 2013; 3:1904. [PMID: 23712735 PMCID: PMC3664904 DOI: 10.1038/srep01904] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 05/07/2013] [Indexed: 12/20/2022] Open
Abstract
Epithelial renewal in skin is achieved by the constant turnover and differentiation of keratinocytes. Three popular hypotheses have been proposed to explain basal keratinocyte regeneration and epidermal homeostasis: 1) asymmetric division (stem-transit amplifying cell); 2) populational asymmetry (progenitor cell with stochastic fate); and 3) populational asymmetry with stem cells. In this study, we investigated lineage dynamics using these hypotheses with a 3D agent-based model of the epidermis. The model simulated the growth and maintenance of the epidermis over three years. The offspring of each proliferative cell was traced. While all lineages were preserved in asymmetric division, the vast majority were lost when assuming populational asymmetry. The third hypothesis provided the most reliable mechanism for self-renewal by preserving genetic heterogeneity in quiescent stem cells, and also inherent mechanisms for skin ageing and the accumulation of genetic mutation.
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Affiliation(s)
- X Li
- Department of Computer Science, University of Sheffield, Sheffield, United Kingdom.
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22
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Tiganescu A, Tahrani AA, Morgan SA, Otranto M, Desmoulière A, Abrahams L, Hassan-Smith Z, Walker EA, Rabbitt EH, Cooper MS, Amrein K, Lavery GG, Stewart PM. 11β-Hydroxysteroid dehydrogenase blockade prevents age-induced skin structure and function defects. J Clin Invest 2013; 123:3051-60. [PMID: 23722901 DOI: 10.1172/jci64162] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Accepted: 03/28/2013] [Indexed: 12/31/2022] Open
Abstract
Glucocorticoid (GC) excess adversely affects skin integrity, inducing thinning and impaired wound healing. Aged skin, particularly that which has been photo-exposed, shares a similar phenotype. Previously, we demonstrated age-induced expression of the GC-activating enzyme 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) in cultured human dermal fibroblasts (HDFs). Here, we determined 11β-HSD1 levels in human skin biopsies from young and older volunteers and examined the aged 11β-HSD1 KO mouse skin phenotype. 11β-HSD1 activity was elevated in aged human and mouse skin and in PE compared with donor-matched photo-protected human biopsies. Age-induced dermal atrophy with deranged collagen structural organization was prevented in 11β-HSD1 KO mice, which also exhibited increased collagen density. We found that treatment of HDFs with physiological concentrations of cortisol inhibited rate-limiting steps in collagen biosynthesis and processing. Furthermore, topical 11β-HSD1 inhibitor treatment accelerated healing of full-thickness mouse dorsal wounds, with improved healing also observed in aged 11β-HSD1 KO mice. These findings suggest that elevated 11β-HSD1 activity in aging skin leads to increased local GC generation, which may account for adverse changes occurring in the elderly, and 11β-HSD1 inhibitors may be useful in the treatment of age-associated impairments in dermal integrity and wound healing.
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Affiliation(s)
- Ana Tiganescu
- Centre for Endocrinology, Diabetes and Metabolism, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
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23
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Hunt ND, Li GD, Zhu M, Levette A, Chachich ME, Spangler EL, Allard JS, Hyun DH, Ingram DK, de Cabo R. Effect of calorie restriction and refeeding on skin wound healing in the rat. AGE (DORDRECHT, NETHERLANDS) 2012; 34:1453-1458. [PMID: 22037865 PMCID: PMC3528375 DOI: 10.1007/s11357-011-9321-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Accepted: 09/23/2011] [Indexed: 05/31/2023]
Abstract
Calorie restriction (CR) is a reliable anti-aging intervention that attenuates the onset of a number of age-related diseases, reduces oxidative damage, and maintains function during aging. In the current study, we assessed the effects of CR and other feeding regimens on wound healing in 7-month-old Fischer-344 rats from a larger cohort of rats that had been fed either ad libitum (AL) or 40% calorie restricted based on AL consumption. Rats were assigned to one of three diet groups that received three skin punch wounds along the dorsal interscapular region (12-mm diameter near the front limbs) of the back as follows: (1) CR (n = 8) were wounded and maintained on CR until they healed, (2) AL (n = 5) were wounded and maintained on AL until wound closure was completed, and (3) CR rats were refed (RF, n = 9) AL for 48 h prior to wounding and maintained on AL until they healed. We observed that young rats on CR healed more slowly while CR rats refed for 48 h prior to wounding healed as fast as AL fed rats, similar to a study reported in aged CR and RF mice (Reed et al. 1996). Our data suggest that CR subjects, regardless of age, fail to heal well and that provision of increased nutrition to CR subjects prior to wounding enhances the healing process.
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Affiliation(s)
- Nicole D. Hunt
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Garrick D. Li
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Min Zhu
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Andrew Levette
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Mark E. Chachich
- />Department of Psychology, Towson University, Towson, MD 21252 USA
| | - Edward L. Spangler
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Joanne S. Allard
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
| | - Dong-Hoon Hyun
- />Department of Life Science, Ewha Womans University, 11-1 Daehyeon-dong Seodaemun-gu, Seoul, 120-750 South Korea
| | - Donald K. Ingram
- />Nutritional Neuroscience and Aging Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA 70808-412 USA
| | - Rafael de Cabo
- />Laboratory of Experimental Gerontology, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224 USA
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Reed MJ, Damodarasamy M, Chan CK, Johnson MNR, Wight TN, Vernon RB. Cleavage of hyaluronan is impaired in aged dermal wounds. Matrix Biol 2012; 32:45-51. [PMID: 23022999 DOI: 10.1016/j.matbio.2012.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Revised: 09/18/2012] [Accepted: 09/19/2012] [Indexed: 10/27/2022]
Abstract
Changes in extracellular matrix (ECM) are one of many components that contribute to impaired wound healing in aging. This study examined the effect of age on the glycosaminoglycan hyaluronan (HA) in normal and wounded dermis from young (4-6 month-old) and aged (22-24 month-old) mice. HA content and size were similar in the normal dermis of young and aged mice. Dermal explants labeled with [(3)H]-glucosamine showed decreased generation of smaller forms of HA in aged explants relative to young explants. Aged mice exhibited delayed wound repair compared with young mice with the greatest differential at 5 days. Expression of hyaluronan synthase (HAS) 2 and 3, and hyaluronidase (HYAL) 1-3 mRNA in wounds of young and aged mice was similar. There was a trend toward a decreased HYAL protein expression in aged wound dermis, which was accompanied by changes in detectable HYAL activity. Total HA content was similar in young and aged wound dermis. There was significantly less HA in the lower MW range (~250 kDa and smaller) in 5-day wound dermis, but not in 9-day wound dermis, from aged mice relative to young mice. We propose that decreased cleavage of HA is an additional component of impaired dermal wound healing in aging.
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Affiliation(s)
- May J Reed
- Department of Medicine, University of Washington, Harborview Medical Center, 325 9th Ave., Seattle, WA 98104, USA.
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25
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Prabhu V, Rao SBS, Chandra S, Kumar P, Rao L, Guddattu V, Satyamoorthy K, Mahato KK. Spectroscopic and histological evaluation of wound healing progression following Low Level Laser Therapy (LLLT). JOURNAL OF BIOPHOTONICS 2012; 5:168-84. [PMID: 22174176 DOI: 10.1002/jbio.201100089] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/23/2011] [Accepted: 11/23/2011] [Indexed: 05/09/2023]
Abstract
The present study focuses on the evaluation of the effect of He-Ne laser on tissue regeneration by monitoring collagen synthesis in wound granulation tissues in Swiss albino mice using analysis of laser induced fluorescence (LIF) and light microscopy techniques. The spectral analyses of the wound granulation tissues have indicated a dose dependent increase in collagen levels during the post-wounding days. The histological examinations on the other hand have also shown a significant increase in collagen deposition along with the reduced edema, leukocytes, increased granulation tissue, and fibroblast number in the optimal laser dose treated group compared to the non-illuminated controls.
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Affiliation(s)
- Vijendra Prabhu
- Biophysics Unit, Manipal Life Sciences Centre, Manipal University, Manipal 576104, Karnataka, India
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26
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Moirangthem V, Katz WS, Su W, Choi EY, Dingle RWC, Zeigler GM, Everson WV, Jennings CD, Gong M, Swanson HI. Impact of 2,3,7,8-tetrachlorodibenzo-p-dioxin on cutaneous wound healing. ACTA ACUST UNITED AC 2011; 65:61-7. [PMID: 21726989 DOI: 10.1016/j.etp.2011.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 06/25/2010] [Accepted: 06/06/2011] [Indexed: 12/23/2022]
Abstract
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a representative of a large group of polyhalogenated aromatic hydrocarbons that are widespread environmental contaminants. Administration of TCDD to laboratory animals or cultured cells results in a number of adverse effects that are well documented. For example, the effects of TCDD observed in developing organisms indicate that exposure to this class of environmental contaminants significantly alters embryo morphogenesis. However, it is not clear whether tissue regeneration in adult animals may be similarly affected. With this in mind, we examined the impact of TCDD exposure on wound healing using a murine cutaneous wound healing model. Our results indicate that TCDD exposure did not significantly alter the time needed for wound closure. However, in the TCDD-treated mice, a significant decrease in tensile strength in the healed wounds was observed which is indicative of an aberrantly healed wound. Immunostaining revealed that exposure to TCDD increased the population of macrophages detected within the wounded tissue at the latter stages of wound healing. Our findings support the idea that exposure to environmental contaminants such as TCDD is proinflammatory in the wounded tissue, disrupts normal healing and ultimately produces in a poorly healed wound.
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Affiliation(s)
- Valentina Moirangthem
- Department of Molecular and Biomedical Pharmacology, College of Medicine, University of Kentucky, MS 305, Lexington, KY 40536, United States
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Ozone and ozonated oils in skin diseases: a review. Mediators Inflamm 2010; 2010:610418. [PMID: 20671923 PMCID: PMC2910505 DOI: 10.1155/2010/610418] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Accepted: 05/12/2010] [Indexed: 11/18/2022] Open
Abstract
Although orthodox medicine has provided a variety of topical anti-infective agents, some of them have become scarcely effective owing to antibiotic- and chemotherapeutic-resistant pathogens. For more than a century, ozone has been known to be an excellent disinfectant that nevertheless had to be used with caution for its oxidizing properties. Only during the last decade it has been learned how to tame its great reactivity by precisely dosing its concentration and permanently incorporating the gas into triglycerides where gaseous ozone chemically reacts with unsaturated substrates leading to therapeutically active ozonated derivatives. Today the stability and efficacy of the ozonated oils have been already demonstrated, but owing to a plethora of commercial products, the present paper aims to analyze these derivatives suggesting the strategy to obtain products with the best characteristics.
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Damodarasamy M, Vernon RB, Karres N, Chang CH, Bianchi-Frias D, Nelson PS, Reed MJ. Collagen extracts derived from young and aged mice demonstrate different structural properties and cellular effects in three-dimensional gels. J Gerontol A Biol Sci Med Sci 2010; 65:209-18. [PMID: 20080876 DOI: 10.1093/gerona/glp202] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Three-dimensional (3D) type I collagen gels are increasingly utilized to simulate extracellular matrix (ECM) in vivo, but little is known about the effects of age on this model. Collagen was extracted from young (4-6 months) and aged (20-24 months) mice tails and compared. The collagens appeared similar by electrophoresis. However, relative to young, aged collagen formed fibrils slower and generated 3D gels with smaller diameter, less dense fibrils (75 vs 34 nm diameter and 8 vs 3.5% area, for young and aged respectively, p < 0.02). Correspondingly, aged collagen gels were more malleable and contractible (5% vs 19% compression, p < .02, and 73% vs 15.5% area, p < .01, for young and aged, respectively). Fibroblasts cultured within young and aged collagen gels had differential expression of a limited number of genes and proteins corresponding to specific integrins and matrix components. In summary, collagen extracted from young and aged mice is an effective means to examine the influence of aging on functional properties of ECM that are relevant in vivo.
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Affiliation(s)
- Mamatha Damodarasamy
- Department of Medicine, Harborview Medical Center, University of Washington, Box 359625, 325 Ninth Avenue, Seattle, WA 98104, USA
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Abstract
SummaryOur ability to heal wounds deteriorates with age, leading in many cases to a complete lack of repair and development of a chronic wound. Moreover, as the elderly population continues to grow the prevalence of non-healing chronic wounds is escalating. Cutaneous wound repair occurs through a combination of overlapping phases, including an initial inflammatory response, a proliferative phase and a final remodelling phase. In elderly subjects the inflammatory response is delayed, macrophage and fibroblast function compromised, angiogenesis reduced and re-epithelialization inhibited. Whilst a large body of historic research describes the defective processes that lead to delayed healing, only recently have the molecular mechanisms by which these defects arise begun to be elucidated. Current therapies available for treatment of chronic wounds in elderly people are surprisingly limited and generally ineffective. Thus there is an urgent need to develop new therapeutic strategies based on these recent molecular and cellular insights.
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Mulder G, Lee DK. Case Presentation: Xenograft Resistance to Protease Degradation in a Vasculitic Ulcer. INT J LOW EXTR WOUND 2009; 8:157-61. [DOI: 10.1177/1534734609344126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vasculitic ulcers are related to numerous underlying etiologies including autoimmune disease, rheumatoid arthritis and other inflammatory conditions.The resulting ulcerations are associated with high levels of pain, inflammation and tissue necrosis. Current therapies, including surgical intervention, are limited by the underlying inflammatory process and complications secondary to the wound etiology. conservative care has been relatively unsuccessful in promoting wound closure.This case presentations reviews the successful results of using a xenograft in the treatment of an inflammatory ulcer associated with cryoglobulinemia and vasculitis. Product integrity was maintained postoperatively, compared to an allograft, thereby allowing the wound treatment site to progress to closure.The type of cross linkage of acellular grafts may have a direct effect on product stability and treatment outcomes.
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Binnebösel M, Junge K, Schwab R, Antony A, Schumpelick V, Klinge U. Delayed wound healing in sacrococcygeal pilonidal sinus coincides with an altered collagen composition. World J Surg 2009; 33:130-6; discussion 137. [PMID: 18839241 DOI: 10.1007/s00268-008-9748-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Although patients with pilonidal sinus are young and, thus, are expected to heal well, a delayed healing with high risk of recurrence frequently is observed. This study was initiated to test whether disorders in the extracellular matrix (ECM) may be detected in patients with pilonidal sinus and delayed wound healing or recurrent disease, respectively. METHODS In 48 patients, tissue specimens were obtained at the index operation. All patients were treated by local excision and primary wound closure. The collagen type I/III ratio, the expression of matrix metalloproteinase (MMP)-1, -9, and -13, as well as the proliferation index (Ki67) and the macrophage infiltrate (CD68) were measured. Patients with an uneventful wound healing by primary intention were compared with those in which the healing by primary intention fails (secondary healing), and patients suffering first onset of pilonidal sinus or to those patients who had undergone previous surgery for pilonidal sinus. Clinical parameters and comorbidity were evaluated. RESULTS Patients with secondary healing, exhibited at the index operation a significantly lower collagen type I/III ratio (2.34+/-0.4) compared with patients with problem-free wound healing (3.04+/-0.7). Furthermore, significantly higher expression of MMP-1, -9, and 13, and a significantly higher proliferation index (Ki67) were found in the specimens of the patients with secondary healing. In patients in whom the operation was performed because of a recurrence expression of both Ki67 and CD68 were significantly higher. Smokers had an increased risk for suffering recurrent disease, but did not show differences in the collagen ratio. CONCLUSIONS As a novel finding, this study indicates that disturbances of the ECM may predict a delayed wound healing after pilonidal sinus surgery.
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Affiliation(s)
- Marcel Binnebösel
- Department of Surgery, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074, Aachen, Germany.
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32
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Wicke C, Bachinger A, Coerper S, Beckert S, Witte MB, Königsrainer A. Aging influences wound healing in patients with chronic lower extremity wounds treated in a specialized wound care center. Wound Repair Regen 2009; 17:25-33. [DOI: 10.1111/j.1524-475x.2008.00438.x] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nanney LB, Woodrell CD, Greives MR, Cardwell NL, Pollins AC, Bancroft TA, Chesser A, Michalak M, Rahman M, Siebert JW, Gold LI. Calreticulin enhances porcine wound repair by diverse biological effects. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 173:610-30. [PMID: 18753412 DOI: 10.2353/ajpath.2008.071027] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Extracellular functions of the endoplasmic reticulum chaperone protein calreticulin (CRT) are emerging. Here we show novel roles for exogenous CRT in both cutaneous wound healing and diverse processes associated with repair. Compared with platelet-derived growth factor-BB-treated controls, topical application of CRT to porcine excisional wounds enhanced the rate of wound re-epithelialization. In both normal and steroid-impaired pigs, CRT increased granulation tissue formation. Immunohistochemical analyses of the wounds 5 and 10 days after injury revealed marked up-regulation of transforming growth factor-beta3 (a key regulator of wound healing), a threefold increase in macrophage influx, and an increase in the cellular proliferation of basal keratinocytes of the new epidermis and of cells of the neodermis. In vitro studies confirmed that CRT induced a greater than twofold increase in the cellular proliferation of primary human keratinocytes, fibroblasts, and microvascular endothelial cells (with 100 pg/ml, 100 ng/ml, and 1.0 pg/ml, respectively). Moreover, using a scratch plate assay, CRT maximally induced the cellular migration of keratinocytes and fibroblasts (with 10 pg/ml and 1 ng/ml, respectively). In addition, CRT induced concentration-dependent migration of keratinocytes, fibroblasts macrophages, and monocytes in chamber assays. These in vitro bioactivities provide mechanistic support for the positive biological effects of CRT observed on both the epidermis and dermis of wounds in vivo, underscoring a significant role for CRT in the repair of cutaneous wounds.
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Affiliation(s)
- Lillian B Nanney
- Department of Plastic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Nishio N, Okawa Y, Sakurai H, Isobe KI. Neutrophil depletion delays wound repair in aged mice. AGE (DORDRECHT, NETHERLANDS) 2008; 30:11-19. [PMID: 19424869 PMCID: PMC2276589 DOI: 10.1007/s11357-007-9043-y] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2007] [Accepted: 12/07/2007] [Indexed: 05/27/2023]
Abstract
One of the most important clinical problems in caring for elderly patients is treatment of pressure ulcers. One component of normal wound healing is the generation of an inflammatory reaction, which is characterized by the sequential infiltration of neutrophils, macrophages and lymphocytes. Neutrophils migrate early in the wound healing process. In aged C57BL/6 mice, wound healing is relatively inefficient. We examined the effects of neutrophil numbers on wound healing in both young and aged mice. We found that the depletion of neutrophils by anti-Gr-1 antibody dramatically delayed wound healing in aged mice. The depletion of neutrophils in young mice had less effect on the kinetics of wound healing. Intravenous G-CSF injection increased the migration of neutrophils to the wound site. While the rate of wound repair did not change significantly in young mice following G-CSF injection, it increased significantly in old mice.
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Affiliation(s)
- Naomi Nishio
- Department of Immunology, Nagoya University Graduate School of Medicine, 65 Turumai-cho, Showa-ku, Nagoya, Aichi, 466-8520 Japan
| | - Yayoi Okawa
- Department of Functioning Activation, National Institute for Longevity Sciences, National Center for Geriatrics Gerontology, Aichi, Japan
| | - Hidetoshi Sakurai
- Department of Immunology, Nagoya University Graduate School of Medicine, 65 Turumai-cho, Showa-ku, Nagoya, Aichi, 466-8520 Japan
| | - Ken-ichi Isobe
- Department of Immunology, Nagoya University Graduate School of Medicine, 65 Turumai-cho, Showa-ku, Nagoya, Aichi, 466-8520 Japan
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Rochette PJ, Brash DE. Progressive apoptosis resistance prior to senescence and control by the anti-apoptotic protein BCL-xL. Mech Ageing Dev 2008; 129:207-14. [PMID: 18262222 DOI: 10.1016/j.mad.2007.12.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2007] [Revised: 12/09/2007] [Accepted: 12/18/2007] [Indexed: 11/30/2022]
Abstract
Senescent cells are known to be resistant to apoptosis induced by genotoxic stress. Here we examine apoptosis in human diploid fibroblasts that are old but not yet senescent. We found that as cells aged, they became progressively more resistant to UV-induced apoptosis with an eventual apoptosis reduction of 10-20-fold. This behavior tracked a progressive disruption of the normal balance between pro- and anti-apoptotic proteins. In young cells, the level of anti-apoptotic protein BCL-xL quickly fell after UV irradiation while pro-apoptotic protein BAX rose. The increase in BAX tracked the level of P53, a transcriptional regulator of BAX. In older cells, the scenario was quite different. Instead of decreasing, the level of BCL-xL increased dramatically after UV stress so that the ratio of pro-apoptotic BAX to anti-apoptotic BCL-xL remained low. RNAi against BCL-xL restored the UV-sensitivity of old cells, indicating that BCL-xL is itself responsible for the pre-senescence decline in the ability of a genotoxic stress to induce apoptosis.
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Affiliation(s)
- Patrick J Rochette
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT 06520-8040, USA
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36
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Binnebösel M, Klinge U, Rosch R, Junge K, Lynen-Jansen P, Schumpelick V. Morphology, quality, and composition in mature human peritoneal adhesions. Langenbecks Arch Surg 2007; 393:59-66. [PMID: 17605037 DOI: 10.1007/s00423-007-0198-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Accepted: 05/04/2007] [Indexed: 10/23/2022]
Abstract
BACKGROUND AND AIM Peritoneal adhesions are caused by intra-abdominal surgery and can lead to relevant complications. Adhesions are supposed to consist of avascular scar tissue. The aim of the present study was to analyze whether mature postsurgical adhesions even after years still reveal a dynamic remodeling process. MATERIALS AND METHODS In a prospective analysis, we investigated tissue specimen of peritoneal adhesions in 40 patients after abdominal surgery. Expression of five parameters representing wound healing and remodeling were examined (MMP-2, Ki-67, apoptosis, collagen/protein ratio, and collagen type I/III ratio). RESULTS Gender, age, and the number of previous operations had no impact on the parameters measured. Adhesion specimens were cell rich, containing mononuclear round cells, fibroblasts, adipose cells, and vascular endothelial cells. There was a positive expression of MMP-2 and apoptosis, whereas Ki-67 was marginal irrespective of adhesion maturity or quality. Adhesions classified as dense showed a significant increase in total collagen (118.2 +/- 4.9 microg/mg) and collagen type I/III ratios (3.9 +/- 0.2), whereas there were no significant differences regarding the adhesion maturity. CONCLUSION The distinct composition of cellular components as well as of extracellular matrix proteins may reflect an interactive cross-talk between adhesion- and stroma-derived cells even in mature adhesions. Our findings support the hypothesis that the disabilities of appropriate repair of the peritoneal surface leading to persistent adhesions are a consequence of a permanent process of disturbed remodeling.
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Affiliation(s)
- Marcel Binnebösel
- Department of Surgery, RWTH Aachen University Hospital, Pauwelsstrasse 30, 52074 Aachen, Germany.
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Abstract
Wound healing is a complex interchange, orchestrated between cellular components that play their respective parts signaled by and mediated by different cellular instruments of healing. When healing is performed well, the final product is a thing of beauty. When healing is delayed, interrupted, or excessive, then unsightly scars of chronic painful wounds that are frustrating to the patient and physician occur.
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Affiliation(s)
- Margaret K Strecker-McGraw
- Department of Emergency Medicine, Scott and White Hospital, Texas A&M University College of Medicine, 2401 S. 31st Street, Temple, TX 76504, USA.
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Abstract
Conditions of impaired wound healing in the elderly are associated with substantial morbidity and mortality and impose a significant financial burden upon the world's health services. The findings of a series of recent studies have served to highlight the contrasting contributions made by sex steroid hormones to the regulation of cutaneous repair processes. Although estrogens accelerate healing, the actions of the "male" sex hormones 5alpha-dihydrotestosterone and testosterone are primarily deleterious. The shift that occurs in the balance between serum estrogen and androgen levels as a normal feature of human aging may therefore have important consequences for fundamental tissue repair processes.
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Affiliation(s)
- Stephen C Gilliver
- Faculty of Life Sciences, Michael Smith Building, M13 9PT Manchester, United Kingdom
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AlDahlawi S, Eslami A, Häkkinen L, Larjava HS. The αvβ6 integrin plays a role in compromised epidermal wound healing. Wound Repair Regen 2006; 14:289-97. [PMID: 16808807 DOI: 10.1111/j.1743-6109.2006.00123.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The alphavbeta6 integrin is an exclusively epithelial integrin that is highly expressed during fetal development. In adult tissue, alphavbeta6 integrin is expressed during inflammation, carcinogenesis, and in wound healing. We previously reported that alphavbeta6 integrin is highly expressed in poorly healing human wounds and its over-expression is associated with chronic wounds in a mouse model. The objective of this study was to investigate the role of alphavbeta6 integrin in compromised wound healing induced by hydrocortisone treatment or aging by using young and old mice deficient in or overexpressing the beta6 integrin subunit in the epidermis. Untreated aged beta6 integrin-deficient (beta6-/-) animals showed a significant delay in wound healing when compared to their age-matched controls or younger beta6-/- mice. The most significant delay was observed at the stages where granulation tissue deposition was occurring. Hydrocortisone treatment significantly delayed wound healing in wild-type and beta6 integrin-deficient mice in comparison with the untreated controls. However, hydrocortisone treatment in beta6 integrin overexpressing animals did not cause a significant delay in wound healing. The results of this study suggest that alphavbeta6 integrin plays an important role in wound healing in animals compromised by either age or stress mimicked by hydrocortisone.
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Affiliation(s)
- Salwa AlDahlawi
- Laboratory of Periodontal Biology, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
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Lim Y, Phung AD, Corbacho AM, Aung HH, Maioli E, Reznick AZ, Cross CE, Davis PA, Valacchi G. Modulation of cutaneous wound healing by ozone: Differences between young and aged mice. Toxicol Lett 2006; 160:127-34. [PMID: 16129572 DOI: 10.1016/j.toxlet.2005.06.013] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2005] [Revised: 06/23/2005] [Accepted: 06/23/2005] [Indexed: 01/17/2023]
Abstract
Cutaneous tissues are frequently exposed to prooxidative environments, including UV radiation and air pollutants. Among the latter, ozone (O(3)) is of particular concern because of its high and dominating presence in photochemical smog. It is well known that O(3) depletes small molecular weight antioxidants, oxidizes proteins, induces lipid peroxidation and activates cellular responses in various tissues. Using an in vivo model (SKH-1 hairless mice), the interaction between O(3) exposure (0.5ppmx6h/day) and age was examined in relation to cutaneous wound healing. Compared to younger (8 weeks) mice, older (18 months) mice exposed to O(3) (day 0 to day 9 after wounding) exhibited delayed wound closure, increased lipid peroxidation (measured as 4-HNE protein adducts) and protein oxidation (measured as carbonyls concentration) and decreased levels of P-IkappaBalpha and TGFbeta protein. These findings support the hypothesis that oxidant pollutant exposure and age interact so as to disrupt normal wound healing processes.
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Affiliation(s)
- Yunsook Lim
- Department of Internal Medicine, School of Medicine, UC Davis, CA, USA
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Hideshima K, Sekine J, Mimura S, Inokuchi T. HSP 47 and Angiogenic Factor Expression and Its Implication for the Healing of Periosteal Defects in the Mouse Cranium. ACTA ACUST UNITED AC 2006. [DOI: 10.3353/omp.11.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Abstract
Ageing is thought to impair wound healing, but this review of current research shows that there is conflicting evidence concerning many cellular mechanisms, while concomitant factors in older people may result in delayed healing.
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Affiliation(s)
- A Crooks
- Taybank Medical Centre, Dundee, Scotland, UK.
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Abstract
Rats have been widely used in the study of skin wound healing and the efficacy of different treatment modalities. This particular animal species is often selected for its availability, low cost, and small size. To define the current use of rat skin wound healing models, this manuscript provides a review of articles published between 2000 and 2003 that chose rats as their research animals. Of the 55 articles reviewed, it was found that 38.2% of the studies used incisional models and 38.2% used excisional models, with some studies using combinations. The majority of the studies (78.2%) used the rat's dorsum as the wound location. Male Sprague Dawley in the 250-300 gram weight range were the most preferred rats. Sodium pentobarbital/pentobarbitone was the most commonly used anesthetic choice. Similarities and differences in the selected experimental conditions are noted and questions are raised with regard to comparability between studies and the ability to transfer the data from the animal model to the human clinical situation. Attempts to compare studies for the advancement of wound healing knowledge are being hampered by the differences found between the studies. Standardization in reporting could facilitate comparisons and may instigate additional research that favors the inevitable comparisons between the studies. Thus, universal reporting requirements need to be developed for animal wound healing studies.
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Affiliation(s)
- Wanda A Dorsett-Martin
- Department of Surgery, Division of Plastic Surgery, School of Medicine, The University of Mississippi Medical Center, Jackson, MS 39126-4505, USA.
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Wilgus TA, Vodovotz Y, Vittadini E, Clubbs EA, Oberyszyn TM. Reduction of scar formation in full-thickness wounds with topical celecoxib treatment. Wound Repair Regen 2003; 11:25-34. [PMID: 12581424 DOI: 10.1046/j.1524-475x.2003.11106.x] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Adult wound repair occurs with an initial inflammatory response, reepithelialization, and the formation of a permanent scar. Although the inflammatory phase is often considered a necessity for successful adult wound healing, fetal healing studies have shown the ability to regenerate skin and to heal wounds in a scarless manner in the absence of inflammation. The cyclooxygenase-2 (COX-2) enzyme, a known mediator of inflammation, has been shown to contribute to a variety of inflammatory conditions and to the development of cancer in many organs. To examine the role of COX-2 in the wound healing process, incisional wounds were treated topically with the anti-inflammatory COX-2 inhibitor celecoxib. Acutely, celecoxib inhibited several parameters of inflammation in the wound site. This decrease in the early inflammatory phase of wound healing had a significant effect on later events in the wound healing process, namely a reduction in scar tissue formation, without disrupting reepithelialization or decreasing tensile strength. Our data suggest that in the absence of infection, adult wound healing is able to commence with decreased inflammation and that anti-inflammatory drugs may be used to improve the outcome of the repair process in the skin by limiting scar formation.
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Affiliation(s)
- Traci A Wilgus
- Department of Pathology, The Ohio State University, Columbus, Ohio 43210, USA
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45
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Abstract
Cutaneous ageing is a complex biological phenomenon consisting of two components; intrinsic ageing, which is largely genetically determined and extrinsic ageing caused by environmental exposure, primarily UV light. In sun-exposed areas, these two processes are superimposed. The process of intrinsic skin ageing resembles that seen in most internal organs and is thought to involve decreased proliferative capacity leading to cellular senescence, and altered biosynthetic activity of skin derived cells. Extrinsic ageing, more commonly termed photoageing, also involves changes in cellular biosynthetic activity but leads to gross disorganisation of the dermal matrix. The molecular mechanisms underlying some of these changes are now beginning to be unravelled and are discussed. As these mechanisms are identified, further insights into the underlying processes of skin ageing should emerge and better strategies to prevent the undesirable effects of age on skin appearance should follow.
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Affiliation(s)
- Gail Jenkins
- Unilever R&D Colworth, Biosciences Division, Sharnbrook, Bedford, UK.
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