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Ramaut L, Moonen L, Geeroms M, Leemans G, Peters E, Forsyth R, Gutermuth J, Hamdi M. Improvement in Early Scar Maturation by Nanofat Infiltration: Histological and Spectrophotometric Preliminary Results From a Split Scar-Controlled, Randomized, Double-Blinded Clinical Trial. Aesthet Surg J Open Forum 2024; 6:ojae072. [PMID: 39360238 PMCID: PMC11446608 DOI: 10.1093/asjof/ojae072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2024] Open
Abstract
Background The regenerative properties of stromal vascular fraction (SVF) in wound healing and scar formation are a subject of increasing clinical interest. Objectives Although preclinical studies have confirmed the angiogenetic, proliferative, and antifibrotic properties of SVF, there is limited clinical evidence from randomized controlled clinical trials. Methods Twelve patients who underwent abdominoplasty were included in this clinical study. Nanofat was mechanically obtained intraoperatively and infiltrated intradermally in the sutured surgical wound, randomly assigned to either the left or the right side. The abdominal scar was evaluated with the Patient and Observer Scar Assessment Scale, whereas erythema and pigmentation were measured with a reflectance spectrophotometry device (Mexameter, Courage + Khazaka electronic GmbH, Köln,Germany). Histological analysis and electron scan microscopy of tissue biopsies were performed at 8 months. Results The treated side of the scar showed significantly less erythema at 3- and 6-month follow-ups, but this difference reduced after 12 months. Patients reported better scar scores at the 6-month follow-up with a significantly better color at the treated side. Observers reported better overall scar scores at the treated side at 3-, 6-, and 12-month follow-ups, with better vascularization, pigmentation, and thickness. There was no statistically significant difference in terms of histological analysis between the 2 groups. There was no difference in the occurrence of adverse events between both sides. Conclusions Infiltration of nanofat exhibited promising results in surgical scar maturation characterized by less erythema and better texture. More clinical trials with a larger sample size are warranted to better elucidate the possible benefits of SVF on surgical scar formation. Level of Evidence 5
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Luo Y, Fu M, Zhou Z, Zhang X, Guo Q, Wang Y, Zhang W, Wang Y, Chen Z, Wu T. A tilapia skin-derived gelatin hydrogel combined with the adipose-derived stromal vascular fraction for full-thickness wound healing. NANOSCALE ADVANCES 2024; 6:4230-4236. [PMID: 39114139 PMCID: PMC11302172 DOI: 10.1039/d4na00332b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 06/18/2024] [Indexed: 08/10/2024]
Abstract
Biomaterials are widely used in regenerative medicine to repair full-thickness skin defect wounds. The adipose-derived stromal vascular fraction (SVF) shows pro-regenerative properties, however, the ex vivo biological activity of SVF is suppressed due to the lack of an external scaffold. Tilapia skin, as a sustained and recyclable biomaterial with low immunogenicity, was applied in the preparation of a hydrogel. The mixture of tilapia skin-derived gelatin and methacrylic anhydride as a scaffold facilitated the paracrine function of SVF and exerted a synergistic effect with SVF to promote wound healing. In this study, 30% (w/v) SVF was added to methacrylate-functionalized tilapia skin gelatin and subsequently exposed to UV irradiation to form a three-dimensional nano-scaffolding composite hydrogel (FG-SVF-3). The effects of paracrine growth factors, neovascularization, and collagen production on wound healing were extensively discussed. FG-SVF-3 displayed a pronounced wound healing ability via in vivo wound models. The FG-SVF-3 hydrogel enhanced the biocompatibility and the expression of EGF, bFGF, and VEGF. FG-SVF-3, as a promising wound dressing, exhibited superior ability to accelerate wound healing, skin regeneration, and wound closure.
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Affiliation(s)
- Yanan Luo
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
- Department of Cosmetic and Plastic Surgery, The Affiliated Hospital of Qingdao University Qingdao 266000 China
| | - Manfei Fu
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
| | - Ziyi Zhou
- Department of Plastic, Reconstructive and Cosmetic Surgery, Xinqiao Hospital, Army Medical University Chongqing 400037 China
| | - Xiaopei Zhang
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
- Shandong Key Laboratory of Medical and Health Textile Materials, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, College of Textile & Clothing, Qingdao University Qingdao 266071 China
| | - Qingxia Guo
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
- Institute of Neuroregeneration & Neurorehabilitation, Department of Pathophysiology, School of Basic Medicine, Qingdao University Qingdao 266071 China
| | - Yawen Wang
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
- Shandong Key Laboratory of Medical and Health Textile Materials, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, College of Textile & Clothing, Qingdao University Qingdao 266071 China
| | - Weina Zhang
- Department of Cosmetic and Plastic Surgery, The Affiliated Hospital of Qingdao University Qingdao 266000 China
| | - Yuanfei Wang
- Qingdao Stomatological Hospital Affiliated to Qingdao University Qingdao 266001 China
| | - Zhenyu Chen
- Department of Cosmetic and Plastic Surgery, The Affiliated Hospital of Qingdao University Qingdao 266000 China
| | - Tong Wu
- Medical Research Center, The Affiliated Hospital of Qingdao University Qingdao 266000 China
- Shandong Key Laboratory of Medical and Health Textile Materials, Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education, College of Textile & Clothing, Qingdao University Qingdao 266071 China
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Yu Y, Zhang H, Sun Z, Wang S, Zhao X, Zhao B, Zhang A. Exploring Preclinical Experiments with Different Fat Types for Autologous Fat Grafting. Aesthetic Plast Surg 2024; 48:2330-2342. [PMID: 38413446 DOI: 10.1007/s00266-024-03905-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 02/02/2024] [Indexed: 02/29/2024]
Abstract
BACKGROUND Autologous fat transplantation has been a cornerstone of tissue regeneration for decades. However, there is no standardized selection system or criteria for fat graft selection, often relying heavily on the surgeon's experience. OBJECTIVES This study aimed to investigate various types of fat derivatives, both in vitro and in vivo at the same condition. METHODS We collected traditional fat granules of different sizes and SVF-gel, evaluating the viability of ADSCs isolated from them and their performance after grafting into mice. RESULTS Large fat granules exhibited more complete adipocyte structures, and the isolated ADSCs demonstrated superior differentiation, proliferation, and secretion capacities. They also showed excellent volume retention after 12 weeks. In contrast, ADSCs isolated from SVF-gel displayed lower vitality. However, grafts from SVF-gel exhibited the highest volume maintenance rate among the four groups after 12 weeks, closely resembling normal adipose tissue and displaying significant vascularization. Compared to large fat granule and SVF-gel group, medium and small fat granule grafts exhibited lower volume retention and less angiogenesis. CONCLUSIONS Through preclinical studies, the flexible clinical use of different fat grafts can be tailored to their unique characteristics. LEVEL OF EVIDENCE I This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- Yixi Yu
- Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Huabin Zhang
- Xuzhou Central Hospital, Xuzhou, Jiangsu Province, China
| | - Zefan Sun
- Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Shun Wang
- Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Xiangbin Zhao
- Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Bingkun Zhao
- Department of Plastic and Cosmetic Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China.
| | - Aijun Zhang
- Department of Plastic and Cosmetic Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China.
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Erçelik O, Karadaş H, Kaptan Z, Bilgen AS, Samaraz Olgun P, Çaydere M, Hücümenoğlu S. The effect of adipose tissue-derived stromal vascular fraction/gel material on wound healing in a rat model of nasal mucosa injury. Acta Otolaryngol 2024; 144:371-378. [PMID: 39141586 DOI: 10.1080/00016489.2024.2385594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 08/16/2024]
Abstract
BACKGROUND Stromal Vascular fraction/gel (SVF/gel) is prepared mechanically from autologous adipose tissue, and it is known for its regenerative and anti-inflammatory properties. AIMS To assess histopathological effects of adipose tissue-derived SVF/gel and nasal steroids on nasal mucosal healing. MATERIAL AND METHODS Forty-two Wistar Albino rats with right nasal mucosal injury were randomly divided into three groups: control (saline), Mometasone Furoate (MF), and SVF/gel. Control group (n = 14) received saline for 7 days, while MF group (n = 14) was administered MF to the right nasal cavity for 7 days. SVF/gel group (n = 14) was treated once with SVF/gel in the right nasal cavity. Histological analysis on days 14 and 28 post-injury focused on evaluating epithelial thickness, inflammation, disarray, subepithelial thickness, goblet cell count, subepithelial fibrosis, presence of ciliated cells, lacunae, adhesion, and neo-osteogenesis. RESULTS When comparing the MF and SVF/gel groups, statistically significant differences were found on day 14 in indices of epithelial thickness, subepithelial thickness, goblet cells, subepithelial fibrosis, and ciliated cells. On day 28, SVF/gel group exhibited higher ciliated cell counts and lower subepithelial fibrosis values (p = .027; p = .016). Additionally, epithelial disarray, adhesions, lacunae, and neo-osteogenesis were not observed in the SVF/gel group. CONCLUSIONS AND SIGNIFICANCE SVF/gel accelerates re-epithelialization, reduces fibrosis and adhesions, and enhances cilia formation compared to nasal steroids. These findings suggest that SVF/gel is an autologous and cost-effective treatment for improving nasal mucosal healing post-injury.
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Affiliation(s)
- Onur Erçelik
- Department of Otolaryngology-Head and Neck Surgery, Bandırma State Hospital, Bandırma, Balıkesir, Turkey
| | - Hatice Karadaş
- Department of Otolaryngology-Head and Neck Surgery, Ankara Research and Training Hospital, Ankara, Turkey
| | - Zeynep Kaptan
- Department of Otolaryngology-Head and Neck Surgery, Ankara Research and Training Hospital, Ankara, Turkey
| | - Akif Sinan Bilgen
- Department of Otolaryngology-Head and Neck Surgery, Ankara Research and Training Hospital, Ankara, Turkey
| | - Pelin Samaraz Olgun
- Department of Otolaryngology-Head and Neck Surgery, Kırşehir Research and Training Hospital, Kırşehir, Turkey
| | - Muzaffer Çaydere
- Department of Pathology, Ankara Research and Training Hospital, Ankara, Turkey
| | - Sema Hücümenoğlu
- Department of Pathology, Ankara Research and Training Hospital, Ankara, Turkey
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Schipper JAM, van Laarhoven CJHCM, Schepers RH, Tuin AJ, Harmsen MC, Spijkervet FKL, Jansma J, van Dongen JA. Mechanical Fractionation of Adipose Tissue-A Scoping Review of Procedures to Obtain Stromal Vascular Fraction. Bioengineering (Basel) 2023; 10:1175. [PMID: 37892905 PMCID: PMC10604552 DOI: 10.3390/bioengineering10101175] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023] Open
Abstract
Clinical indications for adipose tissue therapy are expanding towards a regenerative-based approach. Adipose-derived stromal vascular fraction consists of extracellular matrix and all nonadipocyte cells such as connective tissue cells including fibroblasts, adipose-derived stromal cells (ASCs) and vascular cells. Tissue stromal vascular fraction (tSVF) is obtained by mechanical fractionation, forcing adipose tissue through a device with one or more small hole(s) or cutting blades between syringes. The aim of this scoping review was to assess the efficacy of mechanical fractionation procedures to obtain tSVF. In addition, we provide an overview of the clinical, that is, therapeutic, efficacy of tSVF isolated by mechanical fraction on skin rejuvenation, wound healing and osteoarthritis. Procedures to obtain tissue stromal vascular fraction using mechanical fractionation and their associated validation data were included for comparison. For clinical outcome comparison, both animal and human studies that reported results after tSVF injection were included. We categorized mechanical fractionation procedures into filtration (n = 4), centrifugation (n = 8), both filtration and centrifugation (n = 3) and other methods (n = 3). In total, 1465 patients and 410 animals were described in the included clinical studies. tSVF seems to have a more positive clinical outcome in diseases with a high proinflammatory character such as osteoarthritis or (disturbed) wound healing, in comparison with skin rejuvenation of aging skin. Isolation of tSVF is obtained by disruption of adipocytes and therefore volume is reduced. Procedures consisting of centrifugation prior to mechanical fractionation seem to be most effective in volume reduction and thus isolation of tSVF. tSVF injection seems to be especially beneficial in clinical applications such as osteoarthritis or wound healing. Clinical application of tSVF appeared to be independent of the preparation procedure, which indicates that current methods are highly versatile.
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Affiliation(s)
- Jan Aart M. Schipper
- Department of Oral & Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
| | | | - Rutger H. Schepers
- Department of Oral & Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
| | - A. Jorien Tuin
- Department of Oral & Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
| | - Marco C. Harmsen
- Department of Pathology & Medical Biology, University Medical Center Groningen, University of Groningen, 9712 Groningen, The Netherlands
| | - Fred K. L. Spijkervet
- Department of Oral & Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
| | - Johan Jansma
- Department of Oral & Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands
| | - Joris A. van Dongen
- Department of Pathology & Medical Biology, University Medical Center Groningen, University of Groningen, 9712 Groningen, The Netherlands
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Center Utrecht, Utrecht University, 3584 Utrecht, The Netherlands
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Liu M, Shang Y, Liu N, Zhen Y, Chen Y, An Y. Strategies to Improve AFT Volume Retention After Fat Grafting. Aesthetic Plast Surg 2023; 47:808-824. [PMID: 36316460 DOI: 10.1007/s00266-022-03088-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 08/28/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Autologous fat grafting has gained increasing popularity used in plastic surgery as a strategy to improve functional and aesthetic outcome. However, variable augmentation results have concerned surgeons in that volume loss of grafted fat reported fluctuates unsteadily. AIM An optimal technique that clinically maximizes the long-term survival rate of transplantation is in urgent need to be identified. METHOD The PubMed/MEDLINE database was queried to search for animal and human studies published through March of 2022 with search terms related to adipose grafting encompassing liposuction, adipose graft viability, processing technique, adipose-derived stem cell, SVF and others. RESULTS 45 in vivo studies met inclusion criteria. The principal of ideal processing technique is effective purification of fat and protection of tissue viability, such as gauze rolling and washing-filtration devices. Cell-assisted lipotransfer including SVF, SVF-gel and ADSCs significantly promotes graft retention via differentiation potential and paracrine manner. ADSCs induce polarization of macrophages to regulate inflammatory response, mediate extracellular matrix remodeling and promote endothelial cell migration and sprouting, and differentiate into adipocytes to replace necrotic cells, providing powerful evidence for the benefits and efficacy of cell-assisted lipotransfer. CONCLUSION Based on the current evidence, the best strategy can not be decided. Cell-assisted lipotransfer has great potential for use in regenerative medicine. But so far mechanically prepared SVF-gel is conducive to clinical promotion. PRP as endogenous growth factor sustained-release material shows great feasibility. LEVEL OF EVIDENCE IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
- Meiling Liu
- Department of Plastic Surgery, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China
| | - Yujia Shang
- Department of Plastic Surgery, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China
- College of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Na Liu
- Department of Plastic Surgery, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China
- College of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yonghuan Zhen
- Department of Plastic Surgery, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China
| | - Youbai Chen
- Department of Plastic and Reconstructive Surgery, Chinese PLA General Hospital, Beijing, 100853, China.
| | - Yang An
- Department of Plastic Surgery, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China.
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Mechanical Micronization of Lipoaspirates Combined with Fractional CO 2 Laser for the Treatment of Hypertrophic Scars. Plast Reconstr Surg 2023; 151:549-559. [PMID: 36730385 PMCID: PMC9944742 DOI: 10.1097/prs.0000000000009915] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Treating hypertrophic scars remains challenging. Stromal vascular fraction (SVF) gel is produced by a purely mechanical process from lipoaspirates, rich in adipose-derived stem cells, and has showed therapeutic potential on scars. However, controversial effects on hypertrophic scars are emerging. This study aimed to assess the therapeutic effects of SVF gel combined with fractional CO 2 laser on hypertrophic scars. METHODS A rabbit ear hypertrophic scar model was established. SVF gel combined with fractional CO 2 laser was conducted for hypertrophic scars in rabbits. Scar alleviation in rabbits was observed based on the appearance and histology of scars, and the underlying mechanism was investigated by tissue immunologic analyses and quantitative real time polymerase chain reaction. At last, six patients with hypertrophic scar were treated by SVF gel combined with fractional CO 2 laser. Therapeutic effects were assessed using the Vancouver Scar Scale. RESULTS Following the treatments, hypertrophic scars became less apparent and softer, the dermis became thinner, and collagen fibers appeared looser and arranged in a more organized pattern. The SVF gel plus fractional CO 2 laser group showed the most obvious improvement. In addition, SVF gel combined with fractional CO 2 laser increased adipogenesis in scar tissue, and adipose tissue regeneration was observed. Hypertrophic scars in patients were alleviated after treatment with SVF gel combined with fractional CO 2 laser. CONCLUSIONS SVF gel transplantation combined with fractional CO 2 laser showed encouraging therapeutic effects on hypertrophic scars. Although further investigation is necessary, this technique has great potential for clinical application to treat hypertrophic scars. CLINICAL RELEVANCE STATEMENT This is a new technique for treating hypertrophic scars.
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Cihantimur B, Moret G, Ünal G. Fat Juice: A Novel Approach on the Usage and Preparation of Adipose Tissue By-Products. Aesthet Surg J 2023; 43:NP49-NP55. [PMID: 35980950 DOI: 10.1093/asj/sjac226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/25/2022] [Accepted: 08/01/2022] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Adipose tissue is considered to be naturally rich in a range of bioactive substances that may be extracted directly for therapeutic use without the need for cell isolation or culture. OBJECTIVES The aim of this study was to introduce a novel approach that utilizes stromal vascular fraction in conjunction with fat extract, termed "fat juice," and to perform a comprehensive biochemical analysis in relation to the potential clinical relevance of this new combination. METHODS A total of 11 samples of fat juice from the abdominal lipoaspirate were extracted from 11 healthy patients and analyzed in terms of the quantity and viability of stem cells, the presence and quantification of connective tissue fibers on histopathologic examination, and the levels of interleukin-6, mannose receptor C type 1, and vascular endothelial growth factor measured by enzyme-linked immunosorbent assay. RESULTS Total stem cell amounts ranged from 0.14 × 105 to 1.31 × 105, and cell viability rates varied between 20% and 67.9%. Interleukin-6 protein and vascular endothelial growth factor expressions were highest in Sample 3, while staining intensity was highest in Sample 4. For collagen I, collagen III, and elastin, the highest expressions were observed in Samples 4 and 8, in Sample 3, and in Samples 2 and 4, respectively. CONCLUSIONS Fat juice provides an easy-to-inject concentration of adipocyte/preadipocytes, red blood cells, adipose-derived stem cells, endothelial-derived cells, and cell residues. Prepared through an easy isolation process enabling abundant availability, fat juice seems to be an effective skin quality enhancer with potential for widespread use in the fields of plastic surgery, dermatology, and aesthetic/regenerative medicine.
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Adipose Tissue Development Relies on Coordinated Extracellular Matrix Remodeling, Angiogenesis, and Adipogenesis. Biomedicines 2022; 10:biomedicines10092227. [PMID: 36140327 PMCID: PMC9496222 DOI: 10.3390/biomedicines10092227] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/31/2022] [Accepted: 09/02/2022] [Indexed: 11/24/2022] Open
Abstract
Despite developing prenatally, the adipose tissue is unique in its ability to undergo drastic growth even after reaching its mature size. This development and subsequent maintenance rely on the proper coordination between the vascular niche and the adipose compartment. In this review, the process of adipose tissue development is broken down to explain (1) the ultrastructural matrix remodeling that is undertaken during simultaneous adipogenesis and angiogenesis, (2) the paracrine crosstalk involved during adipose development, (3) the mechanical regulators involved in adipose growth, and (4) the proteolytic and paracrine oversight for matrix remodeling during adipose development. It is crucial to gain a better understanding of the complex relationships that exist between adipose tissue and the vasculature during tissue development to provide insights into the pathological tissue expansion of obesity and to develop improved soft-tissue reconstruction techniques.
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Gardikiotis I, Cojocaru FD, Mihai CT, Balan V, Dodi G. Borrowing the Features of Biopolymers for Emerging Wound Healing Dressings: A Review. Int J Mol Sci 2022; 23:ijms23158778. [PMID: 35955912 PMCID: PMC9369430 DOI: 10.3390/ijms23158778] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 12/02/2022] Open
Abstract
Wound dressing design is a dynamic and rapidly growing field of the medical wound-care market worldwide. Advances in technology have resulted in the development of a wide range of wound dressings that treat different types of wounds by targeting the four phases of healing. The ideal wound dressing should perform rapid healing; preserve the body’s water content; be oxygen permeable, non-adherent on the wound and hypoallergenic; and provide a barrier against external contaminants—at a reasonable cost and with minimal inconvenience to the patient. Therefore, choosing the best dressing should be based on what the wound needs and what the dressing does to achieve complete regeneration and restoration of the skin’s structure and function. Biopolymers, such as alginate (ALG), chitosan (Cs), collagen (Col), hyaluronic acid (HA) and silk fibroin (SF), are extensively used in wound management due to their biocompatibility, biodegradability and similarity to macromolecules recognized by the human body. However, most of the formulations based on biopolymers still show various issues; thus, strategies to combine them with molecular biology approaches represent the future of wound healing. Therefore, this article provides an overview of biopolymers’ roles in wound physiology as a perspective on the development of a new generation of enhanced, naturally inspired, smart wound dressings based on blood products, stem cells and growth factors.
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Affiliation(s)
- Ioannis Gardikiotis
- Advanced Research and Development Center for Experimental Medicine (CEMEX), Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
| | - Florina-Daniela Cojocaru
- Advanced Research and Development Center for Experimental Medicine (CEMEX), Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
- Correspondence: (F.-D.C.); (G.D.)
| | - Cosmin-Teodor Mihai
- Advanced Research and Development Center for Experimental Medicine (CEMEX), Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
| | - Vera Balan
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
| | - Gianina Dodi
- Advanced Research and Development Center for Experimental Medicine (CEMEX), Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
- Correspondence: (F.-D.C.); (G.D.)
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Adipose stromal vascular fraction: a promising treatment for severe burn injury. Hum Cell 2022; 35:1323-1337. [PMID: 35906507 DOI: 10.1007/s13577-022-00743-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 06/24/2022] [Indexed: 11/04/2022]
Abstract
Thermal skin burn injury affects both adults and children globally. Severe burn injury affects a patient's life psychologically, cosmetically, and socially. The pathophysiology of burn injury is well known. Due to the complexity of burn pathophysiology, the development of specific treatment aiding in tissue regeneration is required. Treatment of burn injury depends on burn severity, size of the burn and availability of donor site. Burn healing requires biochemical and cellular events to ensure better cell response to biochemical signals of the healing process. This led to the consideration of using cell therapy for severe burn injury. Adult mesenchymal stem cells have become a therapeutic option because of their ability for self-renewal and differentiation. Adipose stromal vascular fraction (SVF), isolated from adipose tissues, is a heterogeneous cell population that contains adipose-derived stromal/stem cells (ADSC), stromal, endothelial, hematopoietic and pericytic lineages. SVF isolation has advantages over other types of cells; such as heterogeneity of cells, lower invasive extraction procedure, high yield of cells, and fast and easy isolation. Therefore, SVF has many characteristics that enable them to be a therapeutic option for burn treatment. Studies have been conducted mostly in animal models to investigate their therapeutic potential for burn injury. They can be used alone or in combination with other treatment options. Treatment with both ADSCs and/or SVF enhances burn healing through increasing re-epithelization, angiogenesis and decreasing inflammation and scar formation. Research needs to be conducted for a better understanding of the SVF mechanism in burn healing and to optimize current techniques for enhanced treatment outcomes.
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Effects of Intra-Articular Autologous Adipose Micrograft for the Treatment of Osteoarthritis in Dogs: A Prospective, Randomized, Controlled Study. Animals (Basel) 2022; 12:ani12141844. [PMID: 35883392 PMCID: PMC9311928 DOI: 10.3390/ani12141844] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/14/2022] [Indexed: 12/12/2022] Open
Abstract
The purpose of this study was to estimate the safety, feasibility, and efficacy of the intra-articular treatment of autologous microfragmented adipose tissue in dogs with spontaneous osteoarthritis (OA) in comparison with hyaluronic acid (HA), the standard intra-articular treatment. Specifically, it clinically evaluated pain and lameness, the radiographic progression of osteoarthritis, and synovial fluid inflammation. This was a prospective, single-center, parallel-group, randomized, controlled, in vivo clinical study. Participants (n = 40) received either a single intra-articular injection of microfragmented adipose tissue or a single intra-articular injection of HA (1:1). Clinical outcomes were determined using a specialistic clinician assessment obtained by the completion of a specific clinical form based on the Vesseur modified lameness classification system, a pain evaluation using the Visual Analogue Scale (VAS), the measurement of the range of motion (ROM) of the affected joint, limb circumference, and the owners' score evaluation using the Canine Brief Pain Inventory (CBPI) for up to 6 months after the time of injection. Patients underwent a radiographic examination to establish the degree of OA in the affected joint, and synovial fluid samples were collected to assess the biochemical environment of the joint and evaluate and quantify the cellular population and the presence of three specific inflammation biomarkers for up to 60 days. The results of this study suggest that microfragmented autologous adipose tissue is safe and can effectively relieve pain and improve function in dogs with spontaneous articular OA. This one-step procedure is simple, timesaving, cost-effective, minimally invasive, and eliminates the need for complex and time-intensive cell culture processing. Furthermore, the clinical evidence and cytological results suggest better long-term pain control, resulting in an improvement in joint function, compared to HA treatment. The canine spontaneous OA model could play a key role in developing successful treatments for human medicine.
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Sharun K, Jambagi K, Kumar R, Gugjoo MB, Pawde AM, Tuli HS, Dhama K, Amarpal. Clinical applications of adipose-derived stromal vascular fraction in veterinary practice. Vet Q 2022; 42:151-166. [PMID: 35841195 PMCID: PMC9364732 DOI: 10.1080/01652176.2022.2102688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Adipose tissue-derived stromal vascular fraction (AdSVF) comprises a heterogeneous cell population, including the multipotent mesenchymal stem cells, hematopoietic stem cells, immune cells, endothelial cells, fibroblasts, and pericytes. As such, multipotent adipose tissue-derived mesenchymal stem cells (AdMSCs), are one of the important components of AdSVF. Commonly used techniques to harvest AdSVF involve enzymatic or non-enzymatic methods. The enzymatic method is considered to be the gold standard technique due to its higher yield. The cellular components of AdSVF can be resuspended in normal saline, platelet-rich plasma, or phosphate-buffered saline to produce a ready-to-use solution. Freshly isolated AdSVF has exhibited promising osteogenic and vasculogenic capacity. AdSVF has already been proven to possess therapeutic potential for osteoarthritis management. It is also an attractive therapeutic option for enhancing wound healing. In addition, the combined use of AdSVF and platelet-rich plasma has an additive stimulatory effect in accelerating wound healing and can be considered an alternative to AdMSC treatment. It is also widely used for managing various orthopaedic conditions in clinical settings and has the potential for regenerating bone, cartilage, and tendons. Autologous AdSVF cells are used along with bone substitutes and other biological factors as an alternative to conventional bone grafting techniques owing to their promising osteogenic and vasculogenic capacity. It can also be used for treating osteonecrosis, meniscus tear, chondromalacia, and tendon injuries in veterinary practice. It has several advantages over in vitro expanded AdMSC, including precluding the need for culturing, reduced risk of cell contamination, and cost-effectiveness, making it ideal for clinical use.
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Affiliation(s)
- Khan Sharun
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Kaveri Jambagi
- Division of Medicine, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Rohit Kumar
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Mudasir Bashir Gugjoo
- Division of Veterinary Clinical Complex, Faculty of Veterinary Sciences & Animal Husbandry, SKUAST-Kashmir, Shuhama, Srinagar, Jammu and Kashmir-190006, India
| | - Abhijit M Pawde
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala 133207, Haryana, India
| | - Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
| | - Amarpal
- Division of Surgery, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh-243122, India
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In Vivo Evaluation of Mechanically Processed Stromal Vascular Fraction in a Chamber Vascularized by an Arteriovenous Shunt. Pharmaceutics 2022; 14:pharmaceutics14020417. [PMID: 35214149 PMCID: PMC8880586 DOI: 10.3390/pharmaceutics14020417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/01/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
Abstract
Mechanically processed stromal vascular fraction (mSVF) is a promising source for regenerative purposes. To study the in vivo fate of the mSVF, we herein used a vascularized tissue engineering chamber that insulates the target mSVF from the surrounding environment. In contrast to previous models, we propose an arteriovenous (AV) shunt between saphenous vessels in rats without a venous graft. Mechanical SVF was processed from the fat pads of male Sprague Dawley rats, mixed with a fibrin hydrogel and implanted into an inguinal tissue engineering chamber. An arteriovenous shunt was established between saphenous artery and vein. On the contralateral side, an mSVF-fibrin hydrogel mix without vascular axis served as a non-vascularized control. After two and six weeks, rats were sacrificed for further analysis. Mechanical SVF showed significant numbers of mesenchymal stromal cells. Vascularized mSVF explants gained weight over time. Perilipin and CD31 expression were significantly higher in the mSVF explants after six weeks while no difference in DAPI positive cells, collagen deposition and FABP4 expression was observed. Morphologically, no differentiated adipocytes but a dense cell-rich tissue with perilipin-positive cells was found after six weeks. The phosphorylation of ERK1/2 was significantly enhanced after six weeks while Akt activation remained unaltered. Finally, mSVF explants stably expressed and released VEGF, bFGF and TGFb. Vascularized mSVF is able to proliferate and express adipocyte-specific markers. The AV shunt model is a valuable refinement of currently existing AV loop models in the rat which contributes to the fundamental 3R principles of animal research.
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15
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Burn Wound Healing: Clinical Complications, Medical Care, Treatment, and Dressing Types: The Current State of Knowledge for Clinical Practice. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031338. [PMID: 35162360 PMCID: PMC8834952 DOI: 10.3390/ijerph19031338] [Citation(s) in RCA: 76] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/13/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023]
Abstract
According to the World Health Organization (WHO), it is estimated that each year approximately 11 million people suffer from burn wounds, 180,000 of whom die because of such injuries. Regardless of the factors causing burns, these are complicated wounds that are difficult to heal and are associated with high mortality rates. Medical care of a burn patient requires a lot of commitment, experience, and multidirectional management, including surgical activities and widely understood pharmacological approaches. This paper aims to comprehensively review the current literature concerning burn wounds, including classification of burns, complications, medical care, and pharmacological treatment. We also overviewed the dressings (with an emphasis on the newest innovations in this field) that are currently used in medical practice to heal wounds.
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Yazdanpanah A, Madjd Z, Pezeshki-Modaress M, Khosrowpour Z, Farshi P, Eini L, Kiani J, Seifi M, Kundu SC, Ghods R, Gholipourmalekabadi M. Bioengineering of fibroblast-conditioned Polycaprolactone/Gelatin electrospun scaffold for skin tissue engineering. Artif Organs 2022; 46:1040-1054. [PMID: 35006608 DOI: 10.1111/aor.14169] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Synthetic tissue engineering scaffolds has poor biocompatiblity with very low angiogenic properties. Conditioning the scaffolds with functional groups, coating with biological components, especially extracellular matrix (ECM), is an excellent strategy for improving their biomechanical and biological properties. METHODS In the current study, a composite of polycaprolactone and gelatin (PCL/Gel) was electrospun in the ratio of 70/30 and surface modified with 1% gelatin-coating (G-PCL/Gel) or plasma treatment (P-PCL/Gel). The surface modification was determined by SEM and ATR-FTIR spectroscopy, respectively. The scaffolds were cultured with fibroblast 3T3, then decellularized during freeze-thawing process to fabricate a fibroblast ECM-conditioned PCL/Gel scaffold (FC-PCL/Gel). The swelling and degaradtion as well as in vitro and in vivo biocompatibility and angiogenic properties of the scaffolds were evaluated. RESULTS The structure of the surface-modified G-PCL/Gel and P-PCL/Gel were unique and not changed compared to the PCL/Gel scaffolds. ATR-FTIR analysis admitted the formation of oxygen-containing groups, hydroxyl and carboxyl, on the surface of the P-PCL/Gel scaffold. The SEM micrographs and DAPI staining confirmed the cell attachment and the ECM deposition on the platform and successful removal of the cells after decellularization. P-PCL/Gel showed better cell attachment, ECM secretion and deposition after decellularization compared with G-PCL/Gel. The FC-PCL/Gel was considered as an optimized scaffold for further assays in this study. The FC-PCL/Gel showed increased hydrophilic behavior and cytobiocompatibility compared with P-PCL/Gel. The ECM on the FC-PCL/Gel scaffold showed a gradual degradation during 30 days degradation time, as a small amount of ECM remained over the FC-PCL/Gel scaffold at day 30. The FC-PCL/Gel showed significant biocompatibility and improved angiogenic property compared with P-PCL/Gel when subcutaneously implanted in a mouse animal model for 7 and 28 days. CONCLUSIONS Our findings suggest FC-PCL/Gel as an excellent biomimetic construct with high angiogenic properties. This bioengineered construct can serve as a possible application in our future pre-clinical and clinical studies for skin regeneration.
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Affiliation(s)
- Ayna Yazdanpanah
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, University of Medical Sciences, Tehran, Iran
| | - Zahra Madjd
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medicine Sciences, Tehran, Iran
| | | | - Zahra Khosrowpour
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Paniz Farshi
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, University of Medical Sciences, Tehran, Iran.,Department of Biomaterials, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Leila Eini
- Department of Basic Science, Faculty of Veterinary, Science and Research Branch of Islamic, Azad University, Tehran, Iran
| | - Jafar Kiani
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medicine Sciences, Tehran, Iran
| | - Morteza Seifi
- Dept of Medical Genetics, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, T2N 4N1, Canada
| | - Subhas C Kundu
- 3B's Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Guimarães, Portugal
| | - Roya Ghods
- Oncopathology Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Molecular Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medicine Sciences, Tehran, Iran
| | - Mazaher Gholipourmalekabadi
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Medical Biotechnology, Faculty of Allied Medicine, University of Medical Sciences, Tehran, Iran
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Improving Low-Density Fat by Condensing Cellular and Collagen Content through a Mechanical Process: Basic Research and Clinical Applications. Plast Reconstr Surg 2021; 148:1029-1039. [PMID: 34546185 DOI: 10.1097/prs.0000000000008484] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Large-volume fat grafting results in high absorption and complication rates. Low-density fat includes small numbers of viable cells and considerable oil, resulting in nodules and oil cysts. This study evaluated a strategy for large-volume fat grafting using a mechanical process to condense low-density fat and transplanting it with high-density fat. METHODS Low-density fat, defined as the upper half of centrifuged lipoaspirates, was emulsified by intersyringe shifting and centrifuged to obtain condensed low-density fat. Fresh condensed low-density fat was analyzed by counting cells in the stromal vascular fraction, and by electron scanning and Western blotting. The retention rate and histologic changes of the product were analyzed using a fat grafting model in nude mice. Transplantation with a combination of condensed low-density fat and high-density fat was tested in patients undergoing breast reconstruction and breast augmentation. RESULTS The condensed low-density fat derived from low-density fat contained a large number of stromal vascular fraction cells and collagens, comparable to that of high-density fat and much higher than in low-density fat and Coleman fat. Retention rates 12 weeks after transplantation were higher for condensed low-density fat (55.0 ± 7.5 percent) than for low-density fat (31.1 ± 5.7 percent) and Coleman fat (41.1 ± 6.8 percent), with condensed low-density fat having fewer oil cysts and lower macrophage infiltration. Patients grafted with combined condensed low-density fat and high-density fat showed good long-term volume retention. CONCLUSIONS Using mechanical methods to condense low-density fat to a level comparable to that of high-density fat is a practical method of improving fat graft retention and avoiding severe complications. This new strategy may improve the quality of lipoaspirates for patients requiring large-volume augmentation.
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Adipose-Derived Extract Suppresses IL-1β-Induced Inflammatory Signaling Pathways in Human Chondrocytes and Ameliorates the Cartilage Destruction of Experimental Osteoarthritis in Rats. Int J Mol Sci 2021; 22:ijms22189781. [PMID: 34575945 PMCID: PMC8470808 DOI: 10.3390/ijms22189781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/04/2021] [Accepted: 09/08/2021] [Indexed: 12/18/2022] Open
Abstract
We investigated the effects of adipose-derived extract (AE) on cultured chondrocytes and in vivo cartilage destruction. AE was prepared from human adipose tissues using a nonenzymatic approach. Cultured human chondrocytes were stimulated with interleukin-1 beta (IL-1β) with or without different concentrations of AE. The effects of co-treatment with AE on intracellular signaling pathways and their downstream gene and protein expressions were examined using real-time PCR, Western blotting, and immunofluorescence staining. Rat AE prepared from inguinal adipose tissues was intra-articularly delivered to the knee joints of rats with experimental osteoarthritis (OA), and the effect of AE on cartilage destruction was evaluated histologically. In vitro, co-treatment with IL-1β combined with AE reduced activation of the p38 and ERK mitogen-activated protein kinase (MAPK) pathway and nuclear translocation of the p65 subunit of nuclear factor-kappa B (NF-κB), and subsequently downregulated the expressions of matrix metalloproteinase (MMP)-1, MMP-3, MMP-13, a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS)-4, IL-6, and IL-8, whereas it markedly upregulated the expression of IL-1 receptor type 2 (IL-1R2) in chondrocytes. Intra-articular injection of homologous AE significantly ameliorated cartilage destruction six weeks postoperatively in the rat OA model. These results suggested that AE may exert a chondroprotective effect, at least in part, through modulation of the IL-1β-induced inflammatory signaling pathway by upregulation of IL-1R2 expression.
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Liu F, Zhao Y. Effect of Co-transplanting Stromal Vascular Fraction-Gelatin and Platelet-Rich Fibrin on the Long-Term Maintenance of Fat Volume. Aesthetic Plast Surg 2021; 45:1853-1859. [PMID: 33770217 DOI: 10.1007/s00266-021-02240-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 03/14/2021] [Indexed: 12/23/2022]
Abstract
OBJECTIVE In the present study, we aimed to investigate the survival of stromal vascular fraction-gelatin (SVF-gel) grafts and determine whether co-transplantation of SVF-gel and platelet-rich fibrin (PRF) improves long-term maintenance of fat volume (Wei et al. in Oncotarget 8:68542-68556, 2017) in a rabbit model. METHODS SVF-gel was transplanted into the ears of 12 rabbits with (experimental group) or without PRF (control group). Transplantation retention was evaluated based on weight, histology, and immunohistochemistry. RESULTS In the 2nd and 4th weeks, the volume of fat was larger in the experimental group than in the control group. In the 6th week, the absorption of fat was noticeable in both groups, and there was no significant difference in the fat survival rate between the two groups (experimental group: 1.051 ± 0.144 and control group: 0.789 ± 0.232, P > 0.05). HE staining results: At week 2, adipocytes were observed in the experimental group and tended to mature over time. These adipocytes also exhibited an ordered arrangement. Adipocytes with abnormal morphology appeared in the control group in the 4th week. At different weeks, there were more inflammatory cells and fibroblasts in the experimental group than in the control group, and they were arranged in an ordered fashion. Immunohistochemical results: More brown areas were observed in the experimental group than in the control group, and the morphology and distribution of adipocytes in the experimental group were better than those in the control group. The distribution of fibrocytes was also more regular in the experimental group than in the control group. CONCLUSION SVF-gel cannot maintain long-term filling in rabbit ears. The addition of PRF has no influence, although PRF can induce SVF-gel to transform into adipocytes, and the anti-inflammatory effect is noticeable in the early period following the procedure. Co-transplantation also helped to ensure orderly arrangement of fibrin. There were no "volume preservation differences in this experimental model" perhaps there are differences if other models/methodology are employed. No Level Assigned This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine Ratings, please refer to Table of Contents or online Instructions to Authors - www.springer.com/00266 .
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Affiliation(s)
- Fang Liu
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Yu Zhao
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China.
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Yoon SH, Gao J, Xu L, Yu Z, Jiang T, Kang BK, Zhang R, Cao D. Effect of additive-assisted fat transplantation on fat graft survival rate: A preliminary experimental study based on a rabbit animal model. ANN CHIR PLAST ESTH 2021; 66:440-446. [PMID: 33966905 DOI: 10.1016/j.anplas.2021.03.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND Improving the survival rate of fat grafts is yet a difficult problem in the field of autologous fat transplantation. Prevailing methods such as making nanofat and SVF are time-consuming. Hence, the role of additives application in the improvement of fat graft survival during fat transplantation was considered and preliminarily evaluated in a rabbit animal model. METHODS A rabbit animal model was established where rabbit ears were injected with a mixture of 1.5mL of adipose tissue and 1mL of saline (group A), 1.5mL of adipose tissue and 1mL of botulinum toxin A (BoNTA) (group B), 1.5mL of adipose tissue and 1mL of prostaglandin E2 (groupC), 1.5mL of adipose tissue and 1mL of PDRN (group D) respectively. Then, the extents of neovascularization and inflammation were evaluated on the 7th, 14th, 28th, 42nd, 56th and 70th day after injection by ELISA assays and H&E and immunofluorescence staining. RESULTS The results showed that pre-treatment with BoNTA, prostaglandin E2 and PDRN improved graft volume and weight. The H&E and immunofluorescence staining revealed that BoNTA, prostaglandin E2 and PDRN improved the graft angiogenesis. Simultaneously, TNF-α expression level detected by ELISA was the lowest in the PDRN group. CONCLUSION Henceforth, the present preliminary study suggests that pre-transplantation treatment with BoNTA, prostaglandin E2 and PDRN can improve the fat graft angiogenesis and graft integrity, whereby the effect of adding PDRN may be significant.
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Affiliation(s)
- S H Yoon
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - J Gao
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - L Xu
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - Z Yu
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - T Jiang
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - B K Kang
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China
| | - R Zhang
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China.
| | - D Cao
- Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University school of medicine, 639, Zhizaoju road, 200011 Shanghai, China.
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Jiang X, Lai XR, Lu JQ, Tang LZ, Zhang JR, Liu HW. Decellularized adipose tissue: A key factor in promoting fat regeneration by recruiting and inducing mesenchymal stem cells. Biochem Biophys Res Commun 2021; 541:63-69. [PMID: 33477034 DOI: 10.1016/j.bbrc.2020.12.108] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 12/21/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Decellularized adipose tissue (DAT) has attracted much attention due to its wide range of sources and adipose regeneration capacity. However, the lipogenic efficiency of DAT is still controversial due to its unclear mechanism. To this point, it is crucial to clarify the mechanism of DAT in promoting adipose regeneration Objective: This study aims to explore the mechanism of DAT promoting adipose regeneration and survival mechanism of DAT transplantation in vivo. METHODS DAT preparation by repeated freeze-thaw, enzymatic digestion, and isopropanol degreasing. Histology, DAPI, immunohistochemistry, immunofluorescence and scanning electron microscopy confirmed the efficacy and reproducibility of these approaches. BM-MSCs, ADSCs and UCMSCs were cocultured with DAT for 14 days and then stained with oil red O. Adipogenic genes of three MSCs were detected by RT-PCR. DAT and adipose tissue were transplanted subcutaneously into the back of nude mice to observe medium and long-term morphological changes, vascularization, and lipid-forming efficiency. Mass spectrometry (MS)-based proteomic to analyze the adipogenic protein contents of DAT and adipose tissue. RESULTS The DAT without any cellular components but with an abundance of collagen; neither DNA nor lipids were detected. Seeding experiments with MSCs indicated that the DAT provided an inductive microenvironment for adipogenesis, supporting the expression of the master regulators PPARγ. Within four months after transplantation, HE morphology of DAT was identical to adipose cells. Immunofluorescence markers CD31 and perilipin were increased in DAT, while the retention rate gradually decreased over time, eventually accounting for 33.7% of the original volume. MS-based proteomic analyses identified 1013 types of proteins in adipose tissue and 29 proteins in the DAT. Analyses of GO and KEGG databases suggested that DAT contained a variety of proteins involved in fat metabolism. CONCLUSIONS DAT can interact with different types of MSCs and ultimately achieve adipose regeneration. The presence of multiple adipogenic proteins in DAT make it play a vital role in adipose regeneration. DAT is expected to be an ideal bio-derived scaffold for adipose tissue engineering.
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Affiliation(s)
- Xiao Jiang
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
| | - Xin-Rui Lai
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
| | - Jin-Qiang Lu
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
| | - Ling-Zhi Tang
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
| | - Jin-Rong Zhang
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
| | - Hong-Wei Liu
- Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, 510630, PR China; Innovative Technology Research Institute of Tissue Repair and Regeneration, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou, Guangdong Province, 510630, PR China.
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22
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Miller H, De Leo N, Badach J, Lin A, Williamson J, Bonawitz S, Ostrovsky O. Role of marijuana components on the regenerative ability of stem cells. Cell Biochem Funct 2020; 39:432-441. [PMID: 33349985 DOI: 10.1002/cbf.3609] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/01/2020] [Accepted: 12/13/2020] [Indexed: 12/17/2022]
Abstract
Stem cell therapy promotes tissue regeneration and wound healing. Efforts have been made to prime stem cells to enhance their regenerative abilities. Certain marijuana components, namely the non-psychoactive cannabidiol (CBD) and psychoactive tetrahydrocannabinol (THC), are defined as immunomodulators.9 We test whether two sources of stem cells, primed with CBD or THC, would demonstrate improved regenerative abilities. Human adipose-derived stem cells (ASCs) and bone marrow-derived stem cells (BMDSCs), not obtained from the same individual, were treated with low (300 nM) or high (3 μM) concentration CBD. Porcine ASCs and BMDSCs were isolated from a single pig, and treated with either low or high concentrations of CBD or THC. Transwell migration and MTT proliferation assays were performed on the human ASCs and BMDSCs. Also, transwell migration assay was performed on the porcine ASCs and BMDSCs. Finally, a wound healing scratch assay in porcine primary fibroblasts (PFs) was performed, co-cultured with the cannabinoid-treated ASCs. CBD priming at low concentration induces migration by 180% (P < .01) in porcine ASCs, and by only 93% (P < .02) in porcine BMDSCs. In porcine stem cells, THC priming at low concentration induces migration by 91.6% (P < .01) in ASCs but by only 44.3% (P < .03) in BMDSCs. Compared to PFs co-cultured with untreated ASCs, PFs co-cultured with low CBD-primed ASCs had 75% faster wound closure at 18 hours (P < .01). CBD and THC priming of ASCs and BMDSCs, particularly at lower doses, enhances a number of regenerative parameters, suggesting that these major marijuana components may improve stem cell-based therapies. SIGNIFICANCE OF THE STUDY: Our study demonstrates that cannabinoids can enhance the regenerative capacity of two major sources of stem cells, adipose- and bone marrow-derived, from human and porcine donors. Stem cell isolation and expansion is invasive, costly and time consuming. Stem cells with improved regenerative properties may be effective in the treatment of acute or chronic wounds. This is the first study to compare the priming potential of two sources of stem cells from the same animal, with the same genetic and epigenetic profile, as well as the first to prime with THC.
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Affiliation(s)
- Henry Miller
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - Nicholas De Leo
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - Jeremy Badach
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - Andrew Lin
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - John Williamson
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - Steven Bonawitz
- Department of Surgery, Cooper University Hospital, Camden, New Jersey, USA
| | - Olga Ostrovsky
- Cooper Research Institute, Cooper University Hospital, Camden, New Jersey, USA
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Li Q, Zhao F, Li Z, Duan X, Cheng J, Zhang J, Fu X, Zhang J, Shao Z, Guo Q, Hu X, Ao Y. Autologous Fractionated Adipose Tissue as a Natural Biomaterial and Novel One-Step Stem Cell Therapy for Repairing Articular Cartilage Defects. Front Cell Dev Biol 2020; 8:694. [PMID: 32903809 PMCID: PMC7438948 DOI: 10.3389/fcell.2020.00694] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 07/08/2020] [Indexed: 12/22/2022] Open
Abstract
Articular cartilage damage remains a tough challenge for clinicians. Stem cells have emerged promising biologics in regenerative medicine. Previous research has widely demonstrated that adipose-derived mesenchymal stem cells (ADSCs) can promote cartilage repair due to their multipotency. However, enzymatic isolation and monolayer expansion of ADSCs decrease their differentiation potential and limit their clinical application. Here, a novel adipose tissue-derived product, extracellular matrix/stromal vascular fraction gel (ECM/SVF-gel), was obtained by simple mechanical shifting and centrifugation to separate the fat oil and concentrate the effective constituents. This study aimed to evaluate the therapeutic effect of this natural biomaterial on the repair of articular cartilage defects. Scanning electron microscopy showed that the fibrous structure in the ECM/SVF-gel was preserved. ADSCs sprouted from the ECM/SVF-gel were characterized by their ability of differentiation into chondrocytes, osteoblasts, and adipocytes. In a rabbit model, critical-sized cartilage defects (diameter, 4 mm; depth, 1.5 mm) were created and treated with microfracture (MF) or a combination of autologous ECM/SVF-gel injection. The knee joints were evaluated at 6 and 12 weeks through magnetic resonance imaging, macroscopic observation, histology, and immunohistochemistry. The International Cartilage Repair Society score and histological score were significantly higher in the ECM/SVF-gel group than those in the MF-treated group. The ECM/SVF-gel distinctly improved cartilage regeneration, integration with surrounding normal cartilage, and the expression of hyaline cartilage marker, type II collagen, in comparison with the MF treatment alone. Overall, the ready-to-use ECM/SVF-gel is a promising therapeutic strategy to facilitate articular cartilage regeneration. Moreover, due to the simple, time-sparing, cost-effective, enzyme-free, and minimally invasive preparation process, this gel provides a valuable alternative to stem cell-based therapy for clinical translation.
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Affiliation(s)
- Qi Li
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Fengyuan Zhao
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Zong Li
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Xiaoning Duan
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Jin Cheng
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Jiahao Zhang
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Xin Fu
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Jiying Zhang
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Zhenxing Shao
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Qinwei Guo
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Xiaoqing Hu
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
| | - Yingfang Ao
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
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Groppa E, Colliva A, Vuerich R, Kocijan T, Zacchigna S. Immune Cell Therapies to Improve Regeneration and Revascularization of Non-Healing Wounds. Int J Mol Sci 2020; 21:E5235. [PMID: 32718071 PMCID: PMC7432547 DOI: 10.3390/ijms21155235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 12/20/2022] Open
Abstract
With the increased prevalence of chronic diseases, non-healing wounds place a significant burden on the health system and the quality of life of affected patients. Non-healing wounds are full-thickness skin lesions that persist for months or years. While several factors contribute to their pathogenesis, all non-healing wounds consistently demonstrate inadequate vascularization, resulting in the poor supply of oxygen, nutrients, and growth factors at the level of the lesion. Most existing therapies rely on the use of dermal substitutes, which help the re-epithelialization of the lesion by mimicking a pro-regenerative extracellular matrix. However, in most patients, this approach is not efficient, as non-healing wounds principally affect individuals afflicted with vascular disorders, such as peripheral artery disease and/or diabetes. Over the last 25 years, innovative therapies have been proposed with the aim of fostering the regenerative potential of multiple immune cell types. This can be achieved by promoting cell mobilization into the circulation, their recruitment to the wound site, modulation of their local activity, or their direct injection into the wound. In this review, we summarize preclinical and clinical studies that have explored the potential of various populations of immune cells to promote skin regeneration in non-healing wounds and critically discuss the current limitations that prevent the adoption of these therapies in the clinics.
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Affiliation(s)
- Elena Groppa
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; (E.G.); (A.C.); (R.V.); (T.K.)
| | - Andrea Colliva
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; (E.G.); (A.C.); (R.V.); (T.K.)
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34127 Trieste, Italy
| | - Roman Vuerich
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; (E.G.); (A.C.); (R.V.); (T.K.)
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy
| | - Tea Kocijan
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; (E.G.); (A.C.); (R.V.); (T.K.)
| | - Serena Zacchigna
- Cardiovascular Biology Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), 34149 Trieste, Italy; (E.G.); (A.C.); (R.V.); (T.K.)
- Department of Medical, Surgical and Health Sciences, University of Trieste, 34127 Trieste, Italy
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Przekora A. A Concise Review on Tissue Engineered Artificial Skin Grafts for Chronic Wound Treatment: Can We Reconstruct Functional Skin Tissue In Vitro? Cells 2020; 9:cells9071622. [PMID: 32640572 PMCID: PMC7407512 DOI: 10.3390/cells9071622] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/17/2020] [Accepted: 06/21/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic wounds occur as a consequence of a prolonged inflammatory phase during the healing process, which precludes skin regeneration. Typical treatment for chronic wounds includes application of autografts, allografts collected from cadaver, and topical delivery of antioxidant, anti-inflammatory, and antibacterial agents. Nevertheless, the mentioned therapies are not sufficient for extensive or deep wounds. Moreover, application of allogeneic skin grafts carries high risk of rejection and treatment failure. Advanced therapies for chronic wounds involve application of bioengineered artificial skin substitutes to overcome graft rejection as well as topical delivery of mesenchymal stem cells to reduce inflammation and accelerate the healing process. This review focuses on the concept of skin tissue engineering, which is a modern approach to chronic wound treatment. The aim of the article is to summarize common therapies for chronic wounds and recent achievements in the development of bioengineered artificial skin constructs, including analysis of biomaterials and cells widely used for skin graft production. This review also presents attempts to reconstruct nerves, pigmentation, and skin appendages (hair follicles, sweat glands) using artificial skin grafts as well as recent trends in the engineering of biomaterials, aiming to produce nanocomposite skin substitutes (nanofilled polymer composites) with controlled antibacterial activity. Finally, the article describes the composition, advantages, and limitations of both newly developed and commercially available bioengineered skin substitutes.
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Affiliation(s)
- Agata Przekora
- Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodzki 1 Street, 20-093 Lublin, Poland
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26
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Promotion of Hair Growth by Conditioned Medium from Extracellular Matrix/Stromal Vascular Fraction Gel in C57BL/6 Mice. Stem Cells Int 2020; 2020:9054514. [PMID: 32612663 PMCID: PMC7306841 DOI: 10.1155/2020/9054514] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/11/2020] [Accepted: 05/25/2020] [Indexed: 12/17/2022] Open
Abstract
Adipose-derived stem cell- (ADSC-) based regenerative medicine has expanded to include the treatment of hair loss. However, stem cell therapy remains a relatively recent technique, and reports of its use for treating alopecia are rare. ADSCs exert biological functions via the paracrine actions of various growth factors and cytokines. Conditioned medium from ADSCs (ADSCs-CM) is a cell-free suspension rich in growth factors and cytokines that has demonstrated a significant role in stimulating hair growth, with encouraging outcomes in terms of hair regeneration and hair growth. Extracellular matrix/stromal vascular fraction gel (ECM/SVF-gel) is an ADSC- and adipose native extracellular matrix-enriched product for cytotherapy. In this study, we compared the effects of CM from ECM/SVF-gel (ECM/SVF-CM) and from stem cells (SVF-CM) on hair growth in mice. ECM/SVF-CM stimulated hair growth more than SVF-CM, through promoting the proliferation of dermal papilla cells and cells in the bulge, neovascularization, and anagen induction. ECM/SVF-CM might, thus, provide an effective and improved strategy for promoting hair growth. These data provide a theoretical foundation for the clinical administration of ECM/SVF-CM for the treatment of hair loss.
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27
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Cai Y, Yu Z, Yu Q, Zheng H, Xu Y, Deng M, Wang X, Zhang L, Zhang W, Li W. Fat Extract Improves Random Pattern Skin Flap Survival in a Rat Model. Aesthet Surg J 2019; 39:NP504-NP514. [PMID: 31001623 DOI: 10.1093/asj/sjz112] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Adipose tissue and its derivatives, including adipose-derived stem cells, stromal vascular fraction (SVF), and SVF-gel, have been utilized in the treatment of many ischemic disorders. However, the utilization of these products is limited in clinical applications by concerns related to the presence of cells in these derivatives. OBJECTIVES This study aimed to isolate a cell-free fat extract (FE) from fat tissue and to evaluate its proangiogenic ability in vitro as well as its protective effects on skin flap survival in vivo. METHODS FE was isolated from human fat via a mechanical approach. The concentrations of several growth factors in the FE were determined by enzyme-linked immunosorbent assay. The proangiogenic ability of FE was evaluated utilizing assays of the proliferation, migration, and tube formation in human umbilical vein endothelial cells in vitro. The protective effects of FE on the survival of random pattern skin flaps were investigated by subcutaneous injection into rats. RESULTS Enzyme-linked immunosorbent assay results revealed that FE contained proangiogenic growth factors that promoted proliferation, migration, and tube formation in human umbilical vein endothelial cells in vitro. In addition, FE reduced skin flap necrosis and increased survival, as demonstrated by macroscopic measurements and blood flow analysis. Histological analysis revealed that FE treatment increased the capillary density. CONCLUSIONS FE is a cell-free, easy-to-prepare, and growth-factor-enriched liquid derived from human adipose tissue that possesses proangiogenic activity and improves skin flap survival by accelerating blood vessel formation. FE may be potentially used for treating ischemic disorders.
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Affiliation(s)
- Yizuo Cai
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Ziyou Yu
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Qian Yu
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Hongjie Zheng
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Yuda Xu
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Mingwu Deng
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Xiangsheng Wang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Lu Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Wenjie Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
| | - Wei Li
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, China
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28
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Stefanis AJ, Groh T, Arenbergerova M, Arenberger P, Bauer PO. Stromal Vascular Fraction and its Role in the Management of Alopecia: A Review. THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2019; 12:35-44. [PMID: 32038756 PMCID: PMC6937163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Adipose cells organized in small clusters under the reticular dermis closely interact with hair follicular cells and regulate the hair cycle. Intradermal adipocyte progenitor cells are activated toward the end of the telogen phase to proliferate and differentiate into mature adipocytes. These cells, surrounding the hair follicles, secrete signaling molecules that control the progression of the hair cycle. Diseases associated with defects in adipocyte homeostasis, such as lipodystrophy and focal dermal hypoplasia, lead to alopecia. In this review, we discuss the potential influence of stromal vascular fraction from adipose tissue in the management of alopecia as well as its involvement in preclinical and clinical trials.
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Affiliation(s)
- Athanasios J Stefanis
- Drs. Stefanis, Arenbergerova, and Arenberger are with the Department of Dermatology and Venereology, Faculty Hospital Kralovske Vinohrady and Third Medical Faculty of Charles University in Prague, the Czech Republic
- Drs. Groh and Bauer are with Bioinova, Ltd. in Prague, the Czech Republic
| | - Tomas Groh
- Drs. Stefanis, Arenbergerova, and Arenberger are with the Department of Dermatology and Venereology, Faculty Hospital Kralovske Vinohrady and Third Medical Faculty of Charles University in Prague, the Czech Republic
- Drs. Groh and Bauer are with Bioinova, Ltd. in Prague, the Czech Republic
| | - Monika Arenbergerova
- Drs. Stefanis, Arenbergerova, and Arenberger are with the Department of Dermatology and Venereology, Faculty Hospital Kralovske Vinohrady and Third Medical Faculty of Charles University in Prague, the Czech Republic
- Drs. Groh and Bauer are with Bioinova, Ltd. in Prague, the Czech Republic
| | - Petr Arenberger
- Drs. Stefanis, Arenbergerova, and Arenberger are with the Department of Dermatology and Venereology, Faculty Hospital Kralovske Vinohrady and Third Medical Faculty of Charles University in Prague, the Czech Republic
- Drs. Groh and Bauer are with Bioinova, Ltd. in Prague, the Czech Republic
| | - Peter O Bauer
- Drs. Stefanis, Arenbergerova, and Arenberger are with the Department of Dermatology and Venereology, Faculty Hospital Kralovske Vinohrady and Third Medical Faculty of Charles University in Prague, the Czech Republic
- Drs. Groh and Bauer are with Bioinova, Ltd. in Prague, the Czech Republic
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29
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Chen L, Zheng Q, Chen X, Wang J, Wang L. Low-frequency ultrasound enhances vascular endothelial growth factor expression, thereby promoting the wound healing in diabetic rats. Exp Ther Med 2019; 18:4040-4048. [PMID: 31656542 PMCID: PMC6812475 DOI: 10.3892/etm.2019.8051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 08/16/2019] [Indexed: 12/22/2022] Open
Abstract
Diabetes is a chronic metabolic disease with a high prevalence worldwide, which typically delays or impairs wound healing, potentially causing death. Low-frequency ultrasound treatment promotes the repair of various injuries and may promote wound healing. The aim of the present study was to determine whether low-frequency ultrasound can accelerate wound healing, as well as investigate its effects on the expression of vascular endothelial growth factor (VEGF), transforming growth factor (TGF)-β1, interleukin (IL)-6 and tumor necrosis factor (TNF)-α in diabetic rats. A total of 45 Wistar rats were intraperitoneally injected with 1% streptozocin following intraperitoneal injection of pentobarbital sodium anesthesia. Subsequently an incision wound was created in the skin of back. The area of the wound was recorded to calculate the rate of wound healing. The expression of VEGF and TGF-β1 was determined via immunohistochemical analysis and their mRNA and protein levels were measured via reverse transcription-quantitative PCR analysis. The results revealed that when compared with the control group, low-frequency ultrasound treatment significantly increased wound healing rate in diabetic rats and markedly increased the mRNA and protein levels of VEGF and TGF-β1. US treatment also reduced the mRNA and protein levels of TNF-α and IL-6. In conclusion, the results of the present study indicated that low-frequency ultrasound promotes the expression of VEGF and TGF-β1, and inhibits the expression of IL-6 and TNF-α, thereby promoting wound healing in diabetic rats.
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Affiliation(s)
- Lang Chen
- Department of Burns and Plastic, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Qian Zheng
- Department of Clinical Medicine, North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Xianzhuo Chen
- Department of Burns and Plastic, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Jun Wang
- Department of Burns and Plastic, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Lan Wang
- Department of Burns and Plastic, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
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30
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Bi H, Li H, Zhang C, Mao Y, Nie F, Xing Y, Sha W, Wang X, Irwin DM, Tan H. Stromal vascular fraction promotes migration of fibroblasts and angiogenesis through regulation of extracellular matrix in the skin wound healing process. Stem Cell Res Ther 2019; 10:302. [PMID: 31623669 PMCID: PMC6798485 DOI: 10.1186/s13287-019-1415-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/07/2019] [Accepted: 09/11/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND A refractory wound is a typical complication of diabetes and is a common outcome after surgery. Current approaches have difficulty in improving wound healing. Recently, non-expanded stromal vascular fraction (SVF), which is derived from mature fat, has opened up new directions for the treatment of refractory wound healing. The aim of the current study is to systematically investigate the impact of SVF on wound healing, including the rate and characteristics of wound healing, ability of fibroblasts to migrate, and blood transport reconstruction, with a special emphasis on their precise molecular mechanisms. METHODS SVF was isolated by digestion, followed by filtration and centrifugation, and then validated by immunocytochemistry, a MTS proliferation assay and multilineage potential analysis. A wound model was generated by creating 6-mm-diameter wounds, which include a full skin defect, on the backs of streptozocin-induced hyperglycemic mice. SVF or human adipose-derived stem cell (hADSC) suspensions were subcutaneously injected, and the wounds were characterized over a 9-day period by photography and measurements. A scratch test was used to determine whether changes in the migratory ability of fibroblasts occurred after co-culture with hADSCs. Angiogenesis was observed with human umbilical vein endothelial cells. mRNA from fibroblasts, endotheliocyte, and skin tissue were sequenced by high-throughput RNAseq, and differentially expressed genes, and pathways, potentially regulated by SVF or hADSCs were bioinformatically analyzed. RESULTS Our data show that hADSCs have multiple characteristics of MSC. SVF and hADSCs significantly improved wound healing in hyperglycemic mice. hADSCs improve the migratory ability of fibroblasts and capillary structure formation in HUVECs. SVF promotes wound healing by focusing on angiogenesis and matrix remodeling. CONCLUSIONS Both SVF and hADSCs improve the function of fibroblast and endothelial cells, regulate gene expression, and promote skin healing. Various mechanisms likely are involved, including migration of fibroblasts, tubulogenesis of endothelial cells through regulation of cell adhesion, and cytokine pathways.
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Affiliation(s)
- Hongsen Bi
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, 100191 China
| | - Hui Li
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
| | - Chen Zhang
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, 100191 China
| | - Yiqing Mao
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
| | - Fangfei Nie
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, 100191 China
| | - Ying Xing
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
| | - Wuga Sha
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
| | - Xi Wang
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
| | - David M. Irwin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S1A8 Canada
| | - Huanran Tan
- Department of Pharmacology, Peking University, Health Science Center, Beijing, 100191 China
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31
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Chouhan D, Dey N, Bhardwaj N, Mandal BB. Emerging and innovative approaches for wound healing and skin regeneration: Current status and advances. Biomaterials 2019; 216:119267. [DOI: 10.1016/j.biomaterials.2019.119267] [Citation(s) in RCA: 161] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/25/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022]
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32
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Human adipose liquid extract induces angiogenesis and adipogenesis: a novel cell-free therapeutic agent. Stem Cell Res Ther 2019; 10:252. [PMID: 31412933 DOI: 10.1186/s13287-019-1356-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Taking advantage of cellular paracrine mechanisms, the secretome of adipose-derived stem cells (ADSCs) and adipose tissue has been demonstrated to induce tissue repair and regeneration in various ischemic and impaired conditions. However, these cell-based therapies have been hindered by issues, such as inherent safety and cost-efficiency for clinical applications. In this study, we prepared a liquid cell-free extract from human adipose tissue [adipose liquid extract (ALE)] and evaluated its potential therapeutic efficacy. METHODS ALE was prepared from human subcutaneous adipose tissue using a rapid and physical approach, and the protein components in ALE were identified using mass spectrometry analysis. In vivo, the therapeutic effect of this agent was investigated on wound healing in C57BL/6 mice, and wound healing rate, vessel density, and neo-adipocyte formation in wounded skins were measured at days 3, 7, 11, and 14. In vitro, the effect of ALE on the viability of human ADSCs, tube formation of human umbilical vein endothelial cells (HUVECs), and adipogenic differentiation of ADSCs were tested. RESULTS The results demonstrated that ALE contained a variety of growth factors and did not affect cell viability. ALE-treated wounds exhibited accelerated wound healing with increased vessel density and formation of neo-adipocytes compared to that of control wounds. Moreover, when added as a cell culture supplement, ALE effectively induced tube formation of HUVECs and lipid accumulation in ADSCs. ALE-treated ADSCs also exhibited elevated levels of adipogenic gene expression. CONCLUSIONS ALE is a novel growth-rich therapeutic agent that is cell-free and easy to produce. Besides, it is also able to induce angiogenesis and adipogenesis both in vitro and in vivo, thus indicating that it could be used for wound repair and soft tissue regeneration.
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Wu Y, Li K, Zhang Y, Dong J, Yu M, Tian W. [Research progress in adipose tissue promoted wound healing]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2019; 33:756-761. [PMID: 31198006 PMCID: PMC8355768 DOI: 10.7507/1002-1892.201811095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/18/2019] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To summarize recent progress in adipose tissue acting as a more efficient and ideal therapy to facilitate wound repair and evaluate the therapeutic values of adipose tissue. METHODS The related literature about adipose tissue for wound healing in recent years was reviewed and analyzed. RESULTS Enormous studies focus on the capacity of adipose tissue to accelerate wound healing including cellular components, extracellular matrix, and paracrine signaling have been investigated. CONCLUSION Adipose tissue has generated great interest in recent years because of unique advantages such as abundant and accessible source, thriven potential to enhance the regeneration and repair of damaged tissue. However, there is still a need to explore the mechanism that adipose tissue regulates cellular function and tissue regeneration in order to facilitate clinical application of adipose tissue in wound healing.
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Affiliation(s)
- Yue Wu
- National Engineering Laboratory for Oral Regenerative Medicine, West China School of Stomatology, Sichuan University, Chengdu Sichuan, 610041, P.R.China;Department of Oral & Maxillofacial Surgery, Xiangya Stomatological Hospital & School of Stomatology, Central South University, Changsha Hunan, 410006, P.R.China
| | - Kun Li
- Department of Oral & Maxillofacial Surgery, Xiangya Stomatological Hospital & School of Stomatology, Central South University, Changsha Hunan, 410006, P.R.China
| | - Yan Zhang
- National Engineering Laboratory for Oral Regenerative Medicine, West China School of Stomatology, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Jia Dong
- National Engineering Laboratory for Oral Regenerative Medicine, West China School of Stomatology, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Mei Yu
- National Engineering Laboratory for Oral Regenerative Medicine, West China School of Stomatology, Sichuan University, Chengdu Sichuan, 610041,
| | - Weidong Tian
- National Engineering Laboratory for Oral Regenerative Medicine, West China School of Stomatology, Sichuan University, Chengdu Sichuan, 610041,
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Wang YX, Zhu N, Zhang CJ, Wang YK, Wu HT, Li Q, Du K, Liao DF, Qin L. Friend or foe: Multiple roles of adipose tissue in cancer formation and progression. J Cell Physiol 2019; 234:21436-21449. [PMID: 31054175 DOI: 10.1002/jcp.28776] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 12/19/2022]
Abstract
Obesity is well-known as the second factor for tumorigenesis after smoking and is bound up with the malignant progression of several kinds of cancers, including esophageal cancer, liver cancer, colorectal cancer, kidney cancer, and ovarian cancer. The increased morbidity and mortality of obesity-related cancer are mostly attributed to dysfunctional adipose tissue. The possible mechanisms connecting dysfunctional adipose tissue to high cancer risk mainly focus on chronic inflammation, obesity-related microenvironment, adipokine secretion disorder, and browning of adipose tissue, and so forth. The stromal vascular cells in adipose tissue trigger chronic inflammation through secreting inflammatory factors and promote cancer cell proliferation. Hypertrophic adipose tissues lead to metabolic disorders of adipocytes, such as abnormal levels of adipokines that mediate cancer progression and metastasis. Cancer patients often show adipose tissue browning and cancerous cachexia in an advanced stage, which lead to unsatisfied chemotherapy effect and poor prognosis. However, increasing evidence has shown that adipose tissue may display quite opposite effects in cancer development. Therefore, the interaction between cancers and adipose tissue exert a vital role in mediates adipose tissue dysfunction and further leads to cancer progression. In conclusion, targeting the dysfunction of adipose tissue provides a promising strategy for cancer prevention and therapy.
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Affiliation(s)
- Yu-Xiang Wang
- School of Pharmacy, Division of Stem Cell Regulation and Application, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Neng Zhu
- Department of Urology, The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Chan-Juan Zhang
- School of Pharmacy, Division of Stem Cell Regulation and Application, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Yi-Kai Wang
- Department of Biostatistics and Bioinformatics, Emory University, Atlanta, Georgia
| | - Hong-Tao Wu
- Department of Urology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Qun Li
- Outpatient Department of Hanpu Campus, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Ke Du
- School of Pharmacy, Division of Stem Cell Regulation and Application, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Duan-Fang Liao
- Division of Stem Cell Regulation and Application, Key Lab for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan University of Chinese Medicine, Changsha, Hunan, China
| | - Li Qin
- School of Pharmacy, Division of Stem Cell Regulation and Application, Hunan University of Chinese Medicine, Changsha, Hunan, China
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Fibrin Glue Enhances Adipose-Derived Stromal Cell Cytokine Secretion and Survival Conferring Accelerated Diabetic Wound Healing. Stem Cells Int 2018; 2018:1353085. [PMID: 30662467 PMCID: PMC6313983 DOI: 10.1155/2018/1353085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/13/2018] [Indexed: 02/08/2023] Open
Abstract
Introduction Although chronic wounds are a major personal and economic burden, treatment options are still limited. Among those options, adipose-derived stromal cell- (ASC-) based therapies rank as a promising approach but are restricted by the harsh wound environment. Here we use a commercially available fibrin glue to provide a deliverable niche for ASCs in chronic wounds. Material and Methods To investigate the in vitro effect of fibrin glue, cultivation experiments were performed and key cytokines for regeneration were quantified. By using an established murine chronic diabetic wound-healing model, we evaluated the influence of fibrin glue spray seeding on cell survival (In Vivo Imaging System, IVIS), wound healing (wound closure kinetics), and neovascularization of healed wounds (CD31 immunohistochemistry). Results Fibrin glue seeding leads to a significantly enhanced secretion of key cytokines (SDF-1, bFGF, and MMP-2) of human ASCs in vitro. IVIS imaging showed a significantly prolonged murine ASC survival in diabetic wounds and significantly accelerated complete wound closure in the fibrin glue seeded group. CD31 immunohistochemistry revealed significantly more neovascularization in healed wounds treated with ASCs spray seeded in fibrin glue vs. ASC injected into the wound bed. Conclusion Although several vehicles have shown to successfully act as cell carrier systems in preclinical trials, regulatory issues have prohibited clinical usage for chronic wounds. By demonstrating the ability of fibrin glue to act as a carrier vehicle for ASCs, while simultaneously enhancing cellular regenerative function and viability, this study is a proponent of clinical translation for ASC-based therapies.
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Yu Z, Cai Y, Deng M, Li D, Wang X, Zheng H, Xu Y, Li W, Zhang W. Fat extract promotes angiogenesis in a murine model of limb ischemia: a novel cell-free therapeutic strategy. Stem Cell Res Ther 2018; 9:294. [PMID: 30409190 PMCID: PMC6225561 DOI: 10.1186/s13287-018-1014-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/10/2018] [Accepted: 09/21/2018] [Indexed: 12/22/2022] Open
Abstract
Background The proangiogenic capacity of adipose tissue and its derivatives has been demonstrated in a variety of studies. The paracrine mechanism of the cellular component is considered to play a critical role in the regenerative properties of these tissues. However, cell-based therapy for clinical application has been hindered by limitations such as safety, immunogenicity issues, and difficulties in cell preservation, transportation, and phenotype control. In the current study, we aimed to produce a cell-free extract directly from human fat tissue and evaluate its potential therapeutic efficacy. Methods We developed a novel physical approach to produce a cell-free aqueous extract from human fat tissue (fat extract (FE)). The therapeutic potential of FE was investigated in the ischemic hindlimb model of nude mice. After establishment of hindlimb ischemia with ligation of the left femoral artery and intramuscular injection of FE, blood perfusion was monitored at days 0, 7, 14, 21, and 28. Tissue necrosis and capillary density were evaluated. Enzyme-linked immunosorbent assay was used to analyze the growth factors contained in FE. Moreover, the proliferation, migration, and tube formation ability were tested on human umbilical vein endothelial cells (HUVECs) in vitro when treated with FE. The proangiogenic ability of FE was further assessed in an in-vivo Matrigel plug assay. Results FE was prepared and characterized. The intramuscular injection of FE into the ischemic hindlimb of mice attenuated severe limb loss and increased blood flow and capillary density of the ischemic tissue. Enzyme-linked immunosorbent assay showed that FE contained high levels of various growth factors. When added as a cell culture supplement, FE promoted HUVEC proliferation, migration, and tube formation ability in a dose-dependent manner. The subcutaneous injection of Matrigel infused with FE enhanced vascular formation. Conclusions We developed a novel cell-free therapeutic agent, FE, produced from human adipose tissue. FE was able to attenuate ischemic injury and stimulate angiogenesis in ischemic tissues. This study indicates that FE may represent a novel cell-free therapeutic agent in the treatment of ischemic disorders.
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Affiliation(s)
- Ziyou Yu
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Yizuo Cai
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Mingwu Deng
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Dong Li
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Xiangsheng Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Hongjie Zheng
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Yuda Xu
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Wei Li
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China.
| | - Wenjie Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai 9th People's Hospital, Shanghai Jiao Tong University, 639 Zhi Zao Ju Road, Shanghai, 200011, China.
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Walocko FM, Eber AE, Kirsner RS, Badiavas E, Nouri K. Systematic review of the therapeutic roles of adipose tissue in dermatology. J Am Acad Dermatol 2018; 79:935-944. [DOI: 10.1016/j.jaad.2018.06.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 05/13/2018] [Accepted: 06/05/2018] [Indexed: 12/11/2022]
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Deng C, Wang L, Feng J, Lu F. Treatment of human chronic wounds with autologous extracellular matrix/stromal vascular fraction gel: A STROBE-compliant study. Medicine (Baltimore) 2018; 97:e11667. [PMID: 30095623 PMCID: PMC6133447 DOI: 10.1097/md.0000000000011667] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Stem cell therapy is considered as the most promising treatment for chronic wounds. Extracellular matrix/stromal vascular fraction gel (ECM/SVF gel), an adipose-derived stem cell-based cytotherapy, has shown healing potential in experimental wounds in animal models. However, the effects of ECM/SVF gel on human chronic wounds have not been investigated. The aim of the present study is to investigate the therapeutic effect of ECM/SVF gel on human chronic wounds.Autologous ECM/SVF gel was prepared and used to treat patients with chronic wounds in clinics, with negative pressure wound therapy as the positive control. Wound healing rate per week and histological changes were performed.The average wound healing rate per week in the ECM/SVF gel group was 34.55 ± 11.18% compared with 10.16 ± 2.67% in the negative pressure wound therapy group (P < .001). Histological analysis with hematoxylin and eosin, Masson's trichrome staining, and CD31 immunohistochemistry showed less lymphocyte infiltration, more collagen accumulation, and more newly formed vessels in the ECM/SVF gel group treated skins compared to the control.ECM/SVF gel is an effective therapeutic option for chronic wound healing in clinics.
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Affiliation(s)
- Chengliang Deng
- Department of Plastic Surgery, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Liangyue Wang
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Jingwei Feng
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
| | - Feng Lu
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, PR China
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Deng C, He Y, Feng J, Dong Z, Yao Y, Mok H, Lin M, Feng L. Extracellular matrix/stromal vascular fraction gel conditioned medium accelerates wound healing in a murine model. Wound Repair Regen 2018; 25:923-932. [PMID: 29240284 DOI: 10.1111/wrr.12602] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 11/15/2017] [Indexed: 12/19/2022]
Abstract
Conditioned medium (CM) is a new treatment modality in regenerative medicine and has shown a successful outcome in wound healing. We recently introduced extracellular matrix/stromal vascular fraction gel (ECM/SVF-gel), an adipose-derived stem cell and adipose native extracellular matrix-enriched product for cytotherapy. This study aimed to evaluate the effect of CM from ECM/SVF-gel (Gel-CM) on wound healing compared with the conventional CM from adipose tissue (Adi-CM) and stem cell (SVF-CM). In vitro wound healing effect of three CMs on keratinocytes and fibroblasts was evaluated in terms of proliferation property, migratory property, and extracellular matrix production. In vivo, two full-thickness wounds were created on the back of each mice. The wounds were randomly divided to receive Gel-CM, Adi-CM, SVF-CM, and PBS injection. Histologic observations and collagen content of wound skin were made. Growth factors concentration in three CMs was further quantified. In vitro, Gel-CM promoted the proliferation and migration of keratinocytes and fibroblasts and enhanced collagen I synthesis in fibroblasts compared to Adi-CM and SVF-CM. In vivo, wound closure was faster, and dermal and epidermal regeneration was improved in the Gel-CM-treated mice compared to that in Adi-CM and SVF-CM-treated mice. Moreover, The growth factors concentration (i.e., vascular endothelial growth factor, basic fibroblast growth factor, hepatocyte growth factor, and transforming growth factor-β) in Gel-CM were significantly higher than those in Adi-CM and SVF-CM. Gel-CM generated under serum free conditions significantly enhanced wound healing effect compared to Adi-CM and SVF-CM by accelerating cell proliferation, migration, and production of ECM. This improved trophic effect may be attributed to the higher growth factors concentration in Gel-CM. Gel-CM shows potential as a novel and promising alternative to skin wound healing treatment. But limitations include the safety and immunogenicity studies of Gel-CM still remain to be clearly clarified and more data on mechanism study are needed.
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Affiliation(s)
- Chengliang Deng
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China.,Department of Plastic Surgery, Affiliated Hospital of Zunyi Medical College, Zunyi, Guizhou, P.R. China
| | - Yunfan He
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Jingwei Feng
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Ziqing Dong
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Yao Yao
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Hsiaopei Mok
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Maohui Lin
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Lu Feng
- Department of Plastic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
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