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Samakidou G, Eleftheriadou I, Anastasiou IA, Kosta O, Tentolouris A, Evangelou K, Tentolouris N. A Single Center, Randomized Controlled Trial on the Efficacy of Topical Application of ReGenerating Tissue Agents (RGTA) Technology in Diabetic Foot Ulcers. INT J LOW EXTR WOUND 2024:15347346241259893. [PMID: 38832415 DOI: 10.1177/15347346241259893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Diabetic foot ulcers (DFUs) are a serious complication of diabetes mellitus. Clinical data from the use of ReGenerating Tissue Agents (RGTA) technology in patients with DFUs are scarce. The objective of this randomized controlled study was to evaluate the efficacy of RGTA technology in the management of DFUs. Patients with chronic, neuroischemic diabetic foot ulcers were randomized 1:1 to the control group, that received the standard of care, and to the intervention group, that additionally received RGTA twice per week. The duration of the intervention was 12 weeks. Skin biopsies for histological and immunohistochemical analyses from a sample of participants were also performed. About 31 patients completed the study. Five (31.2%) patients in the intervention group achieved complete healing at the end of the intervention period versus 0 patients in the control group (P = .043), [RR: 0.688 (95% CI: 0.494-0.957)]. The intervention group had more ulcers with at least 80% healing of their surface [10 (66.7%) versus 2 (13.3%), P = .008, RR: 0.385 (95% CI: 0.183-0.808)], higher absolute surface reduction [1.5 (0.7, 5.2) versus 0.6 (0.3, 1.0), P = .026] and higher percentages of surface reduction [94 (67, 100) versus 40 (26, 75), P = .001] at the end of the intervention period. More patients in the intervention group achieved at least 50% healing at the fourth week of the study [9 (64.3%) versus 2 (14.3%) P = .018, RR: 0.417 (95% CI: 0.200-0.869)]. Immunohistochemical analyses were performed in a sample of participants that revealed higher expression of CD163, COL3 and VEGFR in the intervention group. The adverse effects were similar between the 2 groups. The data from the present study suggest that the adjunction of RGTA technology in the management of diabetic foot ulcers is a safe practice that promotes wound healing.
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Affiliation(s)
- Georgia Samakidou
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Ioanna Eleftheriadou
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Ioanna A Anastasiou
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Ourania Kosta
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Anastasios Tentolouris
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
| | - Konstantinos Evangelou
- Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos Tentolouris
- First Department of Propaedeutic Internal Medicine, Diabetes Centre, Medical School, National and Kapodistrian University of Athens, Laiko General Hospital, Athens, Greece
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Zakine G, Perruisseau-Carrier A, Becker C, Sedel F, Téot L, Barritault D. A Retrospective Self-Controlled Study Evaluating the Prophylactic Effects of CACIPLIQ20 on Postsurgical Scars. Aesthet Surg J Open Forum 2023; 5:ojad031. [PMID: 37051418 PMCID: PMC10084089 DOI: 10.1093/asjof/ojad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023] Open
Abstract
Background CACIPLIQ20 (OTR3, Paris, France) is a medical device used for the treatment of chronic skin ulcers. It contains a heparan sulfate mimetic that accelerates tissue healing by stabilizing matrix proteins and protecting heparin-binding growth factors. In humans, an open self-controlled study suggested that the topical application of CACIPLIQ20 optimizes skin healing following surgery. Objectives To expand previous findings using a different CACIPLIQ20 administration regimen. Methods Twenty-four females were referred for breast-reduction surgery. Each patient had their own control with 1 CACIPLIQ20-treated and 1 saline-treated control breast. The treated side (right or left) was randomly assigned by the operating surgeon. Scar appearance was assessed by 6 independent raters using a global visual scar comparison scale based on scar photographs. All raters were blinded toward the CACIPLIQ20-treated side. Results The follow-up period following surgery ranged from 1 to 12 months with a median follow-up of 6 months. Overall, there was a mean improvement of 15.2% (SD = 26.7) in favor of CACIPLIQ20 (P = .016). On the CACIPLIQ20-treated side, the mean score per patient was above 20% in 11 patients and above 30% improvement in 8 cases. In contrast, only 3 patients were considered improved by at least 20% on the control side and only 1 above 30%. A comparison of different application regimens suggested that the best trend was obtained with a single administration of CACIPLIQ20 at Day 0. Conclusions In conclusion, CACIPLIQ20 could represent an interesting scar prophylactic therapy, based on a single administration at the time of surgery, and without any known adverse effects. Level of Evidence 3
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Affiliation(s)
- Gilbert Zakine
- Corresponding Author: Dr Gilbert Zakine, 107 Avenue Victor HUGO, 75016 Paris, France. E-mail:
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Alcalde I, Sánchez-Fernández C, Del Olmo-Aguado S, Martín C, Olmiere C, Artime E, Quirós LM, Merayo-Lloves J. Synthetic Heparan Sulfate Mimetic Polymer Enhances Corneal Nerve Regeneration and Wound Healing after Experimental Laser Ablation Injury in Mice. Polymers (Basel) 2022; 14:polym14224921. [PMID: 36433048 PMCID: PMC9694493 DOI: 10.3390/polym14224921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/10/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Background: Abnormal corneal wound healing compromises visual acuity and can lead to neuropathic pain. Conventional treatments usually fail to restore the injured corneal tissue. In this study, we evaluated the effectiveness of a synthetic heparan sulfate mimetic polymer (HSmP) in a mouse model of corneal wound healing. (2) Methods: A surgical laser ablation affecting the central cornea and subbasal nerve plexus of mice was used as a model of the wound-healing assay. Topical treatment with HSmP was contrasted to its vehicle and a negative control (BSS). Corneal repair was studied using immunofluorescence to cell proliferation (Ki67), apoptosis (TUNEL assay), myofibroblast transformation (αSMA), assembly of epithelial cells (E-cadherin) and nerve regeneration (β-tubulin III). (3) Results: At the end of the treatment, normal epithelial cytoarchitecture and corneal thickness were achieved in HSmP-treated animals. HSmP treatment reduced myofibroblast occurrence compared to eyes irrigated with vehicle (p < 0.01) or BSS (p < 0.001). The HSmP group showed 50% more intraepithelial nerves than the BSS or vehicle groups. Only HSmP-treated corneas improved the visual quality to near transparent. (4) Conclusions: These results suggest that HSmP facilitates the regeneration of the corneal epithelium and innervation, as well as restoring transparency and reducing myofibroblast scarring after laser experimental injury.
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Affiliation(s)
- Ignacio Alcalde
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Correspondence:
| | - Cristina Sánchez-Fernández
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
| | - Susana Del Olmo-Aguado
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
| | - Carla Martín
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Department of Functional Biology, University of Oviedo, 33006 Oviedo, Spain
| | - Céline Olmiere
- Laboratoires Thea S.A.S., 63000 Clermont-Ferrand, France
| | - Enol Artime
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
| | - Luis M. Quirós
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Department of Functional Biology, University of Oviedo, 33006 Oviedo, Spain
| | - Jesús Merayo-Lloves
- Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, University of Oviedo, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
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Kesim E, Pirhan D, Yardimoglu Yilmaz M, Yuksel N, Yazir Y, Bicaklioglu G, Furat Rencber S. Comparative Analysis of Matrix-Regenerating Agent and Corneal Cross-Linking in an Experimental Alkali Burn Rabbit Model. Curr Eye Res 2021; 47:187-195. [PMID: 34435926 DOI: 10.1080/02713683.2021.1971722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE This study aimed to investigate the clinical and histopathological effects of corneal cross-linking (CXL) and matrix-regenerating agent (RGTA) treatments after corneal alkali burn. MATERIALS AND METHODS Twenty-four alkali-burned corneas from 24 rabbits were divided into three groups: control, CXL, and RGTA. All animals were investigated for epithelial healing, opacification, ulceration, and neovascularization at days 1, 7, 14, and 21 after the alkali burn. Corneas were excised and sent for histological examination on day 21. RESULTS One animal each from the CXL and control groups exhibited moderate ulceration, while no ulceration was observed in the RGTA group. No significant difference was observed among the groups in corneal thickness or corneal opacity measurements at the final visit (p = .058 and p = .544, respectively). Both RGTA and CXL treatments were effective in terms of epithelial healing and neovascularization (p = .023 and p = .03, respectively). On histological examination, the CXL and RGTA groups were more effective in treating epithelial loss, stromal edema, corneal vascularization, and leukocytic infiltration than the control group (p < .05). The immunohistochemical staining scores of the CXL and RGTA groups for caspase-3, vascular endothelial growth factor, and matrix metalloproteinase-9 in the epithelium and stroma were significantly lower than those in the control group (p < .05). In the immunohistochemical examination for inducible nitric oxide synthase, epithelial staining scores were similar among the groups (p > .05). In contrast, the stromal staining scores of the CXL and RGTA groups were lower than those of the control group (p < .05). CONCLUSION Both CXL and RGTA therapies were effective in reducing anatomical and histopathological complications after corneal alkali burn. Further investigation is needed to determine the optimal timing, duration, and dosage of these treatments.
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Affiliation(s)
- Enes Kesim
- Department of Ophthalmology, Tuzla State Hospital, Istanbul, Turkey
| | - Dilara Pirhan
- Department of Ophthalmology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - Melda Yardimoglu Yilmaz
- Department of Histology and Embryology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - Nursen Yuksel
- Department of Ophthalmology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | - Yusufhan Yazir
- Department of Histology and Embryology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
| | | | - Selenay Furat Rencber
- Department of Histology and Embryology, Kocaeli University Faculty of Medicine, Kocaeli, Turkey
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La CC, Takeuchi LE, Abbina S, Vappala S, Abbasi U, Kizhakkedathu JN. Targeting Biological Polyanions in Blood: Strategies toward the Design of Therapeutics. Biomacromolecules 2020; 21:2595-2621. [DOI: 10.1021/acs.biomac.0c00654] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Desgranges P, Louissaint T, Godeau B, Barritault D. Matrix therapy is a cost-effective solution to reduce amputation risk and improve quality of life: pilot and case studies. Regen Med Res 2019; 7:2. [PMID: 31821145 PMCID: PMC6902838 DOI: 10.1051/rmr/190002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 11/11/2019] [Indexed: 11/29/2022] Open
Abstract
Introduction: Chronic, non-healing ulcers remain one of the most challenging clinical situations for health care practitioners. Often, conventional treatments fail and lead to amputation, further decreasing the patient's quality of life and resulting in enormous medical expenditures for healthcare systems. Here we evaluated the use of and cost-effectiveness of the RGTA (ReGeneraTing Agents) medical device CACIPLIQ20 (OTR4120) for chronic lower-extremity ulcers in patients with Leriche and Fontaine Stage IV peripheral arterial disease who were not eligible for revascularization. Methods: This uncontrolled pilot study included 14 chronic lower extremity ulcers in 12 patients in one hospital. The pilot study included 12 patients with TcPO2 < 20 mm Hg and ABPI < 0.5 who had either a minimum of one chronic lower extremity ulcer or a chronic ulcer related to amputation. OTR4120 was applied twice a week or until complete healing, for up to 12 weeks. Ulcer surface area reduction (%)after 2, 4, 8 and 12 weeks, appearance after 4 weeks, and healing after 12 weeks were measured and recorded. Results: A 35% reduction in ulcer size was achieved after 4 weeks. 7 (50%) out of 14 ulcers completely healed within 1 to 3 months of treatment. Discussion: OTR4120 is an effective therapeutic option for patients with chronic lower extremity ulcers, can provide major improvement of quality of life and has the added benefit of being a significant cost-effective solution for healthcare systems.
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Affiliation(s)
- Pascal Desgranges
- Department of Vascular Surgery, Hospital Henri Mondor, Université Paris-Est, Créteil 94010, France
| | - Taina Louissaint
- Department of Endocrinology, Hospital Henri Mondor, Université Paris-Est, Créteil 94010, France
| | - Bertrand Godeau
- Department of Endocrinology, Hospital Henri Mondor, Université Paris-Est, Créteil 94010, France
| | - Denis Barritault
- OTR3, SAS, 4 rue Française, 75001 Paris, France - CRRET (EA 4397/ERL CNRS 9215), Université Paris-Est, Créteil 94010, France
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Bouvière J, Trignol A, Hoang DH, del Carmine P, Goriot ME, Ben Larbi S, Barritault D, Banzet S, Chazaud B. Heparan Sulfate Mimetics Accelerate Postinjury Skeletal Muscle Regeneration. Tissue Eng Part A 2019; 25:1667-1676. [DOI: 10.1089/ten.tea.2019.0058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Jessica Bouvière
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
| | - Aurélie Trignol
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
- Département Soutien Médico-Chirurgical des Forces, Institut de Recherche Biomédicale des Armées, UMR-MD-1197, Clamart, France
| | - Dieu-Huong Hoang
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
| | - Peggy del Carmine
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
| | - Marie-Emmanuelle Goriot
- Département Soutien Médico-Chirurgical des Forces, Institut de Recherche Biomédicale des Armées, UMR-MD-1197, Clamart, France
| | - Sabrina Ben Larbi
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
| | - Denis Barritault
- OTR3, Paris, France
- Laboratoire CRRET, Université Paris-Est Creteil, Créteil, France
| | - Sébastien Banzet
- Département Soutien Médico-Chirurgical des Forces, Institut de Recherche Biomédicale des Armées, UMR-MD-1197, Clamart, France
| | - Bénédicte Chazaud
- Institut NeuroMyoGène, Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Lyon, France
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Irving S. Managing chronic, nonhealing wounds stalled in the inflammatory phase: a case series using a novel matrix therapy, CACIPLIQ20. Br J Community Nurs 2019; 24:S33-S37. [PMID: 31479338 DOI: 10.12968/bjcn.2019.24.sup9.s33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the biggest challenges faced by healthcare providers is the treatment of chronic, non-healing wounds. This paper reports for the first time in the UK the results of five case studies in which a novel regenerating matrix-based therapy, CACIPLIQ20, was used. CACIPLIQ20 is a heparan sulphate mimetic designed to replace the destroyed heparan sulphate in the extracellular matrix of wound cells. All five patients in this case series had chronic, non-healing ulcers that had not improved with conventional care. Treatment included two applications of CACIPLIQ20 per week, for a maximum of 12 weeks. Three of the five wounds healed completely, and the remaining two showed significant improvements in size and quality. The treatment was well tolerated by the patients and also led to a significant reduction in pain. Moreover, CACIPLIQ20 treatment was found to be highly cost-effective when compared to conventional care, with the potential to save healthcare systems significant resources. Further studies are needed to build a strong evidence base on the use of this product, but these preliminary findings are certainly promising.
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Affiliation(s)
- Sally Irving
- Tissue Viability Service Manager at Somerset Partnership NHS Trust, at the time of the study now, Independent Tissue Viability Nurse Consultant at Specialist Wound Care (Boocare Ltd)
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Rousselle P, Braye F, Dayan G. Re-epithelialization of adult skin wounds: Cellular mechanisms and therapeutic strategies. Adv Drug Deliv Rev 2019; 146:344-365. [PMID: 29981800 DOI: 10.1016/j.addr.2018.06.019] [Citation(s) in RCA: 248] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/28/2018] [Accepted: 06/25/2018] [Indexed: 12/21/2022]
Abstract
Cutaneous wound healing in adult mammals is a complex multi-step process involving overlapping stages of blood clot formation, inflammation, re-epithelialization, granulation tissue formation, neovascularization, and remodelling. Re-epithelialization describes the resurfacing of a wound with new epithelium. The cellular and molecular processes involved in the initiation, maintenance, and completion of epithelialization are essential for successful wound closure. A variety of modulators are involved, including growth factors, cytokines, matrix metalloproteinases, cellular receptors, and extracellular matrix components. Here, we focus on cellular mechanisms underlying keratinocyte migration and proliferation during epidermal closure. Inability to re-epithelialize is a clear indicator of chronic non-healing wounds, which fail to proceed through the normal phases of wound healing in an orderly and timely manner. This review summarizes the current knowledge regarding the management and treatment of acute and chronic wounds, with a focus on re-epithelialization, offering some insights into novel future therapies.
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Research Progress on Conducting Polymer-Based Biomedical Applications. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9061070] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Conducting polymers (CPs) have attracted significant attention in a variety of research fields, particularly in biomedical engineering, because of the ease in controlling their morphology, their high chemical and environmental stability, and their biocompatibility, as well as their unique optical and electrical properties. In particular, the electrical properties of CPs can be simply tuned over the full range from insulator to metal via a doping process, such as chemical, electrochemical, charge injection, and photo-doping. Over the past few decades, remarkable progress has been made in biomedical research including biosensors, tissue engineering, artificial muscles, and drug delivery, as CPs have been utilized as a key component in these fields. In this article, we review CPs from the perspective of biomedical engineering. Specifically, representative biomedical applications of CPs are briefly summarized: biosensors, tissue engineering, artificial muscles, and drug delivery. The motivation for use of and the main function of CPs in these fields above are discussed. Finally, we highlight the technical and scientific challenges regarding electrical conductivity, biodegradability, hydrophilicity, and the loading capacity of biomolecules that are faced by CPs for future work. This is followed by several strategies to overcome these drawbacks.
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Moussa L, Demarquay C, Réthoré G, Benadjaoud MA, Siñeriz F, Pattapa G, Guicheux J, Weiss P, Barritault D, Mathieu N. Heparan Sulfate Mimetics: A New Way to Optimize Therapeutic Effects of Hydrogel-Embedded Mesenchymal Stromal Cells in Colonic Radiation-Induced Damage. Sci Rep 2019; 9:164. [PMID: 30655576 PMCID: PMC6336771 DOI: 10.1038/s41598-018-36631-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 11/25/2018] [Indexed: 12/18/2022] Open
Abstract
Clinical expression of gastrointestinal radiation toxicity on non-cancerous tissue could be very life threatening and clinicians must deal increasingly with the management of late side effects of radiotherapy. Cell therapy, in particular mesenchymal stromal cell (MSC) therapy, has shown promising results in numerous preclinical animal studies and thus has emerged as a new hope for patient refractory to current treatments. However, many stem cell clinical trials do not confer any beneficial effect suggesting a real need to accelerate research towards the successful clinical application of stem cell therapy. In this study, we propose a new concept to improve the procedure of MSC-based treatment for greater efficacy and clinical translatability. We demonstrated that heparan sulfate mimetic (HS-m) injections that restore the extracellular matrix network and enhance the biological activity of growth factors, associated with local injection of MSC protected in a hydrogel, that increase cell engraftment and cell survival, improve the therapeutic benefit of MSC treatment in two animal models relevant of the human pathology. For the first time, a decrease of the injury score in the ulcerated area was observed with this combined treatment. We also demonstrated that the combined treatment favored the epithelial regenerative process. In this study, we identified a new way, clinically applicable, to optimize stem-cell therapy and could be proposed to patients suffering from severe colonic defect after radiotherapy.
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Affiliation(s)
- Lara Moussa
- IRSN, Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE, SERAMED, LRMed, 31 avenue de la division Leclerc, 92262, Fontenay-aux-Roses, France.,INSERM, Institut National de la Santé et de la Recherche Médicale, U1229, Regenerative Medicine and Skeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Université de Nantes, Regenerative Medicine and Squeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France
| | - Christelle Demarquay
- IRSN, Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE, SERAMED, LRMed, 31 avenue de la division Leclerc, 92262, Fontenay-aux-Roses, France
| | - Gildas Réthoré
- INSERM, Institut National de la Santé et de la Recherche Médicale, U1229, Regenerative Medicine and Skeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Université de Nantes, Regenerative Medicine and Squeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Centre Hospitalier Universitaire de Nantes, Pôle Hospitalo-Universitaire 4 (OTONN), 1 Place Alexis Ricordeau, 44042, Nantes, France
| | - Mohamed Amine Benadjaoud
- IRSN, Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE, SERAMED, LRMed, 31 avenue de la division Leclerc, 92262, Fontenay-aux-Roses, France
| | - Fernando Siñeriz
- Société OTR3 (Organes, Tissus, Régénération, Réparation, Remplacement), 4 Rue Française, 75001, Paris, France
| | - Girish Pattapa
- INSERM, Institut National de la Santé et de la Recherche Médicale, U1229, Regenerative Medicine and Skeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Université de Nantes, Regenerative Medicine and Squeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France
| | - Jérôme Guicheux
- INSERM, Institut National de la Santé et de la Recherche Médicale, U1229, Regenerative Medicine and Skeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Université de Nantes, Regenerative Medicine and Squeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Centre Hospitalier Universitaire de Nantes, Pôle Hospitalo-Universitaire 4 (OTONN), 1 Place Alexis Ricordeau, 44042, Nantes, France
| | - Pierre Weiss
- INSERM, Institut National de la Santé et de la Recherche Médicale, U1229, Regenerative Medicine and Skeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Université de Nantes, Regenerative Medicine and Squeleton (RMeS), Faculté de Chirurgie Dentaire, 1 Place Alexis Ricordeau, 44042, Nantes, France.,Centre Hospitalier Universitaire de Nantes, Pôle Hospitalo-Universitaire 4 (OTONN), 1 Place Alexis Ricordeau, 44042, Nantes, France
| | - Denis Barritault
- Société OTR3 (Organes, Tissus, Régénération, Réparation, Remplacement), 4 Rue Française, 75001, Paris, France.,Université Paris-Est Créteil, Laboratoire de recherche sur la Croissance Cellulaire, Réparation, et Régénération Tissulaire, Faculté des Sciences, Université Paris-Est Créteil, 61 Ave du Gal de Gaulle, 94000, Créteil, France
| | - Noëlle Mathieu
- IRSN, Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE, SERAMED, LRMed, 31 avenue de la division Leclerc, 92262, Fontenay-aux-Roses, France.
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Sevik MO, Turhan SA, Toker E. Topical Treatment of Persistent Epithelial Defects with a Matrix Regenerating Agent. J Ocul Pharmacol Ther 2018; 34:621-627. [DOI: 10.1089/jop.2018.0025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Mehmet Orkun Sevik
- Department of Ophthalmology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Semra Akkaya Turhan
- Department of Ophthalmology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Ebru Toker
- Department of Ophthalmology, School of Medicine, Marmara University, Istanbul, Turkey
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13
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Coyac BR, Detzen L, Doucet P, Baroukh B, Llorens A, Bonnaure-Mallet M, Gosset M, Barritault D, Colombier ML, Saffar JL. Periodontal reconstruction by heparan sulfate mimetic-based matrix therapy in Porphyromonas gingivalis-infected mice. Heliyon 2018; 4:e00719. [PMID: 30101201 PMCID: PMC6083019 DOI: 10.1016/j.heliyon.2018.e00719] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/22/2018] [Accepted: 07/31/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Periodontitis is a set of chronic inflammatory diseases affecting the supporting structures of the teeth, during which a persistent release of lytic enzymes and inflammatory mediators causes a self-perpetuating vicious cycle of tissue destruction and repair. A matrix-based therapy using a heparan sulfate (HS) analogue called ReGeneraTing Agent (RGTA) replaces destroyed HS by binding to available heparin-binding sites of structural molecules, leading to restoration of tissue homeostasis in several inflammatory tissue injuries, including a hamster periodontitis model. METHODS The ability of RGTA to restore the periodontium was tested in a model of Porphyromonas gingivalis-infected Balb/cByJ mice. After 12 weeks of disease induction, mice were treated weekly with saline or RGTA (1.5 mg/kg) for 8 weeks. Data were analyzed by histomorphometry. RESULTS RGTA treatment restored macroscopic bone loss. This was related to (1) a significant reduction in gingival inflammation assessed by a decrease in infiltrated connective tissue, particularly in cells expressing interleukin 1ß, an inflammatory mediator selected as a marker of inflammation; (2) a normalization of bone resorption parameters, i.e. number, activation and activity of osteoclasts, and number of preosteoclasts; (3) a powerful bone formation reaction. The Sharpey's fibers of the periodontal ligament recovered their alkaline phosphatase coating. This was obtained while P. gingivalis infection was maintained throughout the treatment period. CONCLUSIONS RGTA treatment was able to control the chronic inflammation characteristic of periodontitis and blocked destruction of periodontal structures. It ensured tissue regeneration with recovery of the periodontium's anatomy.
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Affiliation(s)
- Benjamin R. Coyac
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
| | - Laurent Detzen
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
- Assistance Publique – Hôpitaux de Paris, Paris, France
| | - Philippe Doucet
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
- Private Practice in Periodontics, Paris, France
| | - Brigitte Baroukh
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
| | - Annie Llorens
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
| | | | - Marjolaine Gosset
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
- Assistance Publique – Hôpitaux de Paris, Paris, France
| | - Denis Barritault
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
- OTR3, Paris, France
| | - Marie-Laure Colombier
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
- Assistance Publique – Hôpitaux de Paris, Paris, France
| | - Jean-Louis Saffar
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies oro-faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, Montrouge, France
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Sheikholeslam M, Wright MEE, Jeschke MG, Amini-Nik S. Biomaterials for Skin Substitutes. Adv Healthc Mater 2018; 7:10.1002/adhm.201700897. [PMID: 29271580 PMCID: PMC7863571 DOI: 10.1002/adhm.201700897] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/13/2017] [Indexed: 12/13/2022]
Abstract
Patients with extensive burns rely on the use of tissue engineered skin due to a lack of sufficient donor tissue, but it is a challenge to identify reliable and economical scaffold materials and donor cell sources for the generation of a functional skin substitute. The current review attempts to evaluate the performance of the wide range of biomaterials available for generating skin substitutes, including both natural biopolymers and synthetic polymers, in terms of tissue response and potential for use in the operating room. Natural biopolymers display an improved cell response, while synthetic polymers provide better control over chemical composition and mechanical properties. It is suggested that not one material meets all the requirements for a skin substitute. Rather, a composite scaffold fabricated from both natural and synthetic biomaterials may allow for the generation of skin substitutes that meet all clinical requirements including a tailored wound size and type, the degree of burn, the patient age, and the available preparation technique. This review aims to be a valuable directory for researchers in the field to find the optimal material or combination of materials based on their specific application.
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Affiliation(s)
- Mohammadali Sheikholeslam
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Toronto, Toronto, ON, Canada
| | - Meghan E E Wright
- Institute of Biomaterials & Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Marc G Jeschke
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Toronto, Toronto, ON, Canada
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Saeid Amini-Nik
- Sunnybrook Research Institute, University of Toronto, Toronto, ON, Canada
- Department of Surgery, Division of Plastic and Reconstructive Surgery, University of Toronto, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
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15
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Guerra M, Marques S, Gil JQ, Campos J, Ramos P, Rosa AM, Quadrado MJ, Murta JN. Neurotrophic Keratopathy: Therapeutic Approach Using a Novel Matrix Regenerating Agent. J Ocul Pharmacol Ther 2017; 33:662-669. [DOI: 10.1089/jop.2017.0010] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Marta Guerra
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Department of Ophthalmology, Centro Hospitalar Tondela-Viseu, Viseu, Portugal
| | - Sara Marques
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Department of Ophthalmology, Centro Hospitalar Tondela-Viseu, Viseu, Portugal
| | - João Quadrado Gil
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Joana Campos
- Department of Ophthalmology, Centro Hospitalar de Leiria, Leiria, Portugal
| | - Paula Ramos
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Andreia Martins Rosa
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Maria João Quadrado
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Joaquim Neto Murta
- Department of Ophthalmology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Barritault D, Gilbert-Sirieix M, Rice KL, Siñeriz F, Papy-Garcia D, Baudouin C, Desgranges P, Zakine G, Saffar JL, van Neck J. RGTA ® or ReGeneraTing Agents mimic heparan sulfate in regenerative medicine: from concept to curing patients. Glycoconj J 2016; 34:325-338. [PMID: 27924424 PMCID: PMC5487810 DOI: 10.1007/s10719-016-9744-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/18/2016] [Accepted: 10/20/2016] [Indexed: 01/12/2023]
Abstract
The importance of extracellular matrix (ECM) integrity in maintaining normal tissue function is highlighted by numerous pathologies and situations of acute and chronic injury associated with dysregulation or destruction of ECM components. Heparan sulfate (HS) is a key component of the ECM, where it fulfils important functions associated with tissue homeostasis. Its degradation following tissue injury disrupts this delicate equilibrium and may impair the wound healing process. ReGeneraTing Agents (RGTA®s) are polysaccharides specifically designed to replace degraded HS in injured tissues. The unique properties of RGTA® (resistance to degradation, binding and protection of ECM structural and signaling proteins, like HS) permit the reconstruction of the ECM, restoring both structural and biochemical functions to this essential substrate, and facilitating the processes of tissue repair and regeneration. Here, we review 25 years of research surrounding this HS mimic, supporting the mode of action, pre-clinical studies and therapeutic efficacy of RGTA® in the clinic, and discuss the potential of RGTA® in new branches of regenerative medicine.
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Affiliation(s)
- Denis Barritault
- OTR3, 4 rue Française, 75001 Paris, France
- Laboratory Cell Growth and Tissue Repair (CRRET), UPEC 4397/ERL CNRS 9215, Université Paris Est Cretéil, Université Paris Est, F-94000 Créteil, France
| | | | | | | | - Dulce Papy-Garcia
- Laboratory Cell Growth and Tissue Repair (CRRET), UPEC 4397/ERL CNRS 9215, Université Paris Est Cretéil, Université Paris Est, F-94000 Créteil, France
| | - Christophe Baudouin
- Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- Universite Paris-Saclay, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), 55 Avenue de Paris, 78000 Versailles, France
- Centre Hospitalier National d’Opthalmologie des Quinze Vingts, 28 rue de Charenton, 75012 Paris, France
| | - Pascal Desgranges
- Department of Vascular Surgery, Hopital Henri Mondor, Université Paris-Est Créteil, 51 avenue du Maréchal de Lattre de Tassigny, 94000 Créteil, France
| | - Gilbert Zakine
- Service de Chirurgie Plastique et Reconstructrice, 33 rue de la Tour, Paris, 75016 France
| | - Jean-Louis Saffar
- EA2496 Laboratoire Pathologies, Imagerie et Biothérapies Oro-Faciales, Faculté de Chirurgie Dentaire, Université Paris Descartes, Sorbonne Paris Cité, 1 rue Maurice Arnoux, 92120 Montrouge, France
| | - Johan van Neck
- Department of Plastic and Reconstructive Surgery, Erasmus MC - University Medical Center, Rotterdam, The Netherlands
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Paluck S, Nguyen TH, Maynard HD. Heparin-Mimicking Polymers: Synthesis and Biological Applications. Biomacromolecules 2016; 17:3417-3440. [PMID: 27739666 PMCID: PMC5111123 DOI: 10.1021/acs.biomac.6b01147] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 09/26/2016] [Indexed: 12/13/2022]
Abstract
Heparin is a naturally occurring, highly sulfated polysaccharide that plays a critical role in a range of different biological processes. Therapeutically, it is mostly commonly used as an injectable solution as an anticoagulant for a variety of indications, although it has also been employed in other forms such as coatings on various biomedical devices. Due to the diverse functions of this polysaccharide in the body, including anticoagulation, tissue regeneration, anti-inflammation, and protein stabilization, and drawbacks of its use, analogous heparin-mimicking materials are also widely studied for therapeutic applications. This review focuses on one type of these materials, namely, synthetic heparin-mimicking polymers. Utilization of these polymers provides significant benefits compared to heparin, including enhancing therapeutic efficacy and reducing side effects as a result of fine-tuning heparin-binding motifs and other molecular characteristics. The major types of the various polymers are summarized, as well as their applications. Because development of a broader range of heparin-mimicking materials would further expand the impact of these polymers in the treatment of various diseases, future directions are also discussed.
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Affiliation(s)
- Samantha
J. Paluck
- Department of Chemistry and
Biochemistry and the California NanoSystems Institute, University of California−Los Angeles, 607 Charles E. Young Dr East, Los Angeles, California 90095, United States
| | - Thi H. Nguyen
- Department of Chemistry and
Biochemistry and the California NanoSystems Institute, University of California−Los Angeles, 607 Charles E. Young Dr East, Los Angeles, California 90095, United States
| | - Heather D. Maynard
- Department of Chemistry and
Biochemistry and the California NanoSystems Institute, University of California−Los Angeles, 607 Charles E. Young Dr East, Los Angeles, California 90095, United States
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18
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García B, Merayo-Lloves J, Martin C, Alcalde I, Quirós LM, Vazquez F. Surface Proteoglycans as Mediators in Bacterial Pathogens Infections. Front Microbiol 2016; 7:220. [PMID: 26941735 PMCID: PMC4764700 DOI: 10.3389/fmicb.2016.00220] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 02/10/2016] [Indexed: 11/18/2022] Open
Abstract
Infectious diseases remain an important global health problem. The interaction of a wide range of pathogen bacteria with host cells from many different tissues is frequently mediated by proteoglycans. These compounds are ubiquitous complex molecules which are not only involved in adherence and colonization, but can also participate in other steps of pathogenesis. To overcome the problem of microbial resistance to antibiotics new therapeutic agents could be developed based on the characteristics of the interaction of pathogens with proteoglycans.
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Affiliation(s)
- Beatriz García
- Department of Functional Biology, Microbiology, Faculty of Medicine, University of OviedoOviedo, Spain; Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de OviedoOviedo, Spain
| | - Jesús Merayo-Lloves
- Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de OviedoOviedo, Spain; Department of Surgery, University of OviedoOviedo, Spain
| | - Carla Martin
- Department of Functional Biology, Microbiology, Faculty of Medicine, University of OviedoOviedo, Spain; Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de OviedoOviedo, Spain
| | - Ignacio Alcalde
- Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de Oviedo Oviedo, Spain
| | - Luis M Quirós
- Department of Functional Biology, Microbiology, Faculty of Medicine, University of OviedoOviedo, Spain; Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de OviedoOviedo, Spain
| | - Fernando Vazquez
- Department of Functional Biology, Microbiology, Faculty of Medicine, University of OviedoOviedo, Spain; Instituto Oftalmológico Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de OviedoOviedo, Spain; Service of Microbiology, Central University Hospital of AsturiasOviedo, Spain
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Mateo A, Abadía B, Calvo P, Minguez E, Pablo L, Del Castillo JMB. Treatment of Acanthamoeba neurotrophic corneal ulcer with topical matrix therapy. J Ophthalmic Inflamm Infect 2015; 5:18. [PMID: 26101555 PMCID: PMC4474968 DOI: 10.1186/s12348-015-0048-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 05/27/2015] [Indexed: 11/26/2022] Open
Abstract
Background This study was done to evaluate the visual and anatomical outcomes of topical regenerating agents as a novel therapy for neutrophic corneal ulcer (NCU) secondary to acanthamoeba infection. Findings A 20-year-old woman with a history of contact lens wear was referred to our hospital for keratitis after responding poorly to conventional treatment. In vivo confocal microscopy images suggested acanthamoeba keratitis with double-walled cysts in the anterior corneal stroma. Acanthamoeba infection was confirmed by laboratory findings. She was started on 0.1 % propamidine and 0.02 % chlorhexidine drops every hour. The antibiotic and antifungal drops were stopped when bacterial and fungal cultures proved negative. A central neurotrophic corneal ulcers (NCU) appeared, and despite treatment with artificial tears, bandage contact lens, and autologous serum, the ulcer worsened and she was treated with topical CACICOL20 (1 drop every 2 days) for 8 weeks. The corneal defect was completely repaired in 3 weeks. The treatment was well tolerated, and no local or systemic side effects were noted. Visual acuity remained 20/400. Two months later, the defect was still closed and the patient continued with 0.1 % propamidine and 0.02 % chlorhexidine drops, bandage contact lens, artificial tears, and autologous serum. Conclusions Topical regenerating agents interact with components of the extracellular matrix, binding matrix proteins and protecting them from proteolysis, restoring the matrix environment, and improving tissue healing. In this case, CALCICOL20 was effective for vision stabilization, wound healing, and was well tolerated for NCU secondary to acanthamoeba infection.
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Affiliation(s)
- Antonio Mateo
- Ophthalmology Department, Miguel Servet University Hospital, Isabel la Catolica 1-3, 50009 Zaragoza, Spain ; University of Zaragoza, Zaragoza, Spain
| | - Beatriz Abadía
- Ophthalmology Department, Miguel Servet University Hospital, Isabel la Catolica 1-3, 50009 Zaragoza, Spain
| | - Pilar Calvo
- Ophthalmology Department, Miguel Servet University Hospital, Isabel la Catolica 1-3, 50009 Zaragoza, Spain ; University of Zaragoza, Zaragoza, Spain
| | - Enrique Minguez
- University of Zaragoza, Zaragoza, Spain ; Ophthalmology Department, Lozano Blesa University Clinic Hospital, Zaragoza, Spain
| | - Luis Pablo
- Ophthalmology Department, Miguel Servet University Hospital, Isabel la Catolica 1-3, 50009 Zaragoza, Spain ; University of Zaragoza, Zaragoza, Spain
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Bouaziz F, Ben Romdhane M, Boisset Helbert C, Buon L, Bhiri F, Bardaa S, Driss D, Koubaa M, Fakhfakh A, Sahnoun Z, Kallel F, Zghal N, Ellouz Chaabouni S. Healing efficiency of oligosaccharides generated from almond gum (Prunus amygdalus) on dermal wounds of adult rats. J Tissue Viability 2014; 23:98-108. [PMID: 25201790 DOI: 10.1016/j.jtv.2014.07.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 07/22/2014] [Accepted: 07/28/2014] [Indexed: 01/11/2023]
Abstract
Almond gum is a naturally occurring polymer produced by almond trees and shrubs. Its abundance, as well as its low cost production makes it a potential feedstock for use in food and pharmaceuticals. In this regard, almond gum oligosaccharides were enzymatically generated, purified and their monosaccharide composition assessed using gas chromatography-flame ionization detector. Oligosaccharide analyses show that the most prominent residues were galactose and arabinose with traces of xylose, rhamnose, glucose and mannose. The glycosyl linkage positions were analyzed using gas chromatography - mass spectrometry showing a main chain composed of galactose units [→3)-Gal-(1→] branched mainly with arabinose residues [Ara-(1→]. The potent role of the generated oligosaccharides on rats wound healing was investigated. They have been applied either alone or supplemented, as active substance, with cream formulation, on full-thickness wound created on the dorsum of the rats. The effect of oligosaccharides was assessed by measuring the wound closure percentage, reaching an average of around 100% when applied alone or supplemented to cream formulation. The healing percentage for the control group was only 74.3% at the same day. The histological evaluation of skin sections visualized by light microscopy revealed an improved collagen deposition and an increased fibroblast and vascular densities.
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Affiliation(s)
- Fatma Bouaziz
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Molka Ben Romdhane
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Claire Boisset Helbert
- Centre de Recherches sur les Macromolécules Végétales, C.N.R.S., Université Joseph Fourier, BP 53, Grenoble Cedex 9 38041, France
| | - Laurine Buon
- Centre de Recherches sur les Macromolécules Végétales, C.N.R.S., Université Joseph Fourier, BP 53, Grenoble Cedex 9 38041, France
| | - Fatma Bhiri
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Sana Bardaa
- Pharmacology Laboratory (UR 15/04), Sfax Medicine Faculty, 3029, Sfax University, Tunisia
| | - Dorra Driss
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Mohamed Koubaa
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Akram Fakhfakh
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Zouhair Sahnoun
- Pharmacology Laboratory (UR 15/04), Sfax Medicine Faculty, 3029, Sfax University, Tunisia
| | - Fatma Kallel
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia
| | - Najiba Zghal
- Animal Physiology Laboratory (UR 11/ES-70), Sfax Science Faculty, P.O. Box 1171-3000, Sfax University, Tunisia
| | - Semia Ellouz Chaabouni
- Enzyme Bioconversion Unit (04/UR/09-04), National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia; Common Service Unit of Bioreactor Coupled with an Ultrafilter, National School of Engineering, P.O. Box 1173-3038, Sfax University, Tunisia.
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21
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Hayek S, Dibo S, Baroud J, Ibrahim A, Barritault D. Refractory sickle cell leg ulcer: is heparan sulphate a new hope? Int Wound J 2014; 13:35-8. [PMID: 24618185 DOI: 10.1111/iwj.12217] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 12/16/2013] [Accepted: 12/19/2013] [Indexed: 11/26/2022] Open
Abstract
Patients with sickle cell disease are known to have recurrent lower extremity ulcers that have a high pain score and are resistant to conventional means of wound therapy. This study reports the successful use of synthetic heparan sulphate (Cacipliq20(®) , OTR3, Paris, France) in the treatment of a sickle cell ulcer that had failed to respond to several other means of treatment. Therapeutic success was assessed by complete wound coverage and vast improvement in pain score. This is the first study to report use of heparan sulphate in sickle cell ulcers.
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Affiliation(s)
- Shady Hayek
- Plastic and Reconstructive Surgery, Private Practice, American University of Beirut - Medical Center, Beirut, Lebanon
| | - Saad Dibo
- Plastic and Reconstructive Surgery, Private Practice, American University of Beirut - Medical Center, Beirut, Lebanon
| | - Joe Baroud
- Plastic and Reconstructive Surgery, Private Practice, American University of Beirut - Medical Center, Beirut, Lebanon
| | - Amir Ibrahim
- Plastic and Reconstructive Surgery, Private Practice, American University of Beirut - Medical Center, Beirut, Lebanon
| | - Denis Barritault
- Laboratoire CRRET CNRS, University Paris Est Creteil, Paris, France
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Frescaline G, Bouderlique T, Mansoor L, Carpentier G, Baroukh B, Sineriz F, Trouillas M, Saffar JL, Courty J, Lataillade JJ, Papy-Garcia D, Albanese P. Glycosaminoglycan mimetic associated to human mesenchymal stem cell-based scaffolds inhibit ectopic bone formation, but induce angiogenesis in vivo. Tissue Eng Part A 2014; 19:1641-53. [PMID: 23521005 DOI: 10.1089/ten.tea.2012.0377] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Tissue engineering approaches to stimulate bone formation currently combine bioactive scaffolds with osteocompetent human mesenchymal stem cells (hMSC). Moreover, osteogenic and angiogenic factors are required to promote differentiation and survival of hMSC through improved vascularization through the damaged extracellular matrix (ECM). Glycosaminoglycans (GAGs) are ECM compounds acting as modulators of heparin-binding protein activities during bone development and regenerative processes. GAG mimetics have been proposed as ECM stabilizers and were previously described for their positive effects on bone formation and angiogenesis after local treatment. Here, we developed a strategy associating the GAG mimetic [OTR4120] with bone substitutes to optimize stem cell-based therapeutic products. We showed that [OTR4120] was able to potentiate proliferation, migration, and osteogenic differentiation of hMSC in vitro. Its link to tricalcium phosphate/hydroxyapatite scaffolds improved their colonization by hMSC. Surprisingly, when these combinations were tested in an ectopic model of bone formation in immunodeficient mice, the GAG mimetics inhibit bone formation induced by hMSC and promoted an osteoclastic activity. Moreover, the inflammatory response was modulated, and the peri-implant vascularization stimulated. All together, these findings further support the ability of GAG mimetics to organize the local ECM to coordinate the host response toward the implanted biomaterial, and to inhibit the abnormal bone formation process on a subcutaneous ectopic site.
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Affiliation(s)
- Guilhem Frescaline
- Faculté des Sciences et Technologie, Université Paris Est Créteil, Créteil, France
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RGTA-based matrix therapy in severe experimental corneal lesions: safety and efficacy studies. J Fr Ophtalmol 2013; 36:740-7. [PMID: 23958066 DOI: 10.1016/j.jfo.2013.01.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 01/11/2013] [Accepted: 01/14/2013] [Indexed: 11/24/2022]
Abstract
Corneal alteration potentially leading to ulceration remains a major health concern in ocular surface diseases. A treatment that would improve both the quality and speed of healing and control the inflammation would be of great interest. Regenerating agents (RGTAs) have been shown to stimulate wound healing and modulate undesired fibrosis in various in vivo systems. We investigated the effects of RGTA-OTR4120(®) in a rabbit corneal model in order to assess its potential use in ocular surface diseases. First, we assessed its safety for 7 and 28 days using the Draize test criteria in healthy rabbit eyes; then, we investigated the effect of a single dose (50μl, 5μg) in an alkali-burned cornea model. Daily follow-up of clinical signs of healing was scored, and histology was performed at D7. RGTA was well tolerated; no signs of ocular irritation were observed. In the corneal alkali-burn model, non-RGTA-treated eyes showed inflammatory clinical signs, and histology confirmed a loss of superficial corneal layers with epithelial disorganization, neovascularization and infiltration of inflammatory cells. When compared to NaCl control, RGTA treatment appeared effective in reducing clinical signs of inflammation, enhancing re-epithelialization, and improving histological patterns: edema, fibrosis, neovascularization and inflammation. Three to four layers of epithelial cells were already organized, stroma was virtually unvascularized and keratocytes well implanted in parallel collagen fibers with an overall reorganization similar to normal cornea. RGTA appears to be a promising agent for controlling ocular surface inflammation and promoting corneal healing and was well tolerated. This study offers preclinical information and supports the findings of other (compassionate or pilot) studies conducted in patients with various ocular surface diseases.
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Hayek S, Atiyeh B, Zgheib E. Stewart-Bluefarb syndrome: review of the literature and case report of chronic ulcer treatment with heparan sulphate (Cacipliq20®). Int Wound J 2013; 12:169-72. [PMID: 23556996 DOI: 10.1111/iwj.12074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 02/25/2013] [Accepted: 02/27/2013] [Indexed: 11/29/2022] Open
Abstract
Stewart-Bluefarb syndrome (SBS), also known as acroangiodermatitis or pseudo-Kaposi, is a condition rarely encountered. It involves skin lesions that are clinically similar to Kaposi sarcoma but are histologically different, and are usually secondary to an underlying arteriovenous fistula. Treatment of this disease usually involves the correction of the underlying vascular abnormality, with the mainstay of therapy ranging from compression devices for venous stasis, limited oral medications (dapsone and erythromycin) and local wound care including topical steroids. Different methods of treatment showed varied success but none is ideal. We report a case of a lower extremity ulcer in a 22-year-old male recently diagnosed with SBS successfully treated with heparan sulphate (Cacipliq20®).
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Affiliation(s)
- Shady Hayek
- Division of Plastic and Reconstructive Surgery, American University of Beirut Medical Center, Beirut, Lebanon
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25
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Rioux LE, Moulin V, Beaulieu M, Turgeon SL. Human skin fibroblast response is differentially regulated by galactofucan and low molecular weight galactofucan. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bcdf.2013.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Morin C, Roumegous A, Carpentier G, Barbier-Chassefière V, Garrigue-Antar L, Caredda S, Courty J. Modulation of inflammation by Cicaderma ointment accelerates skin wound healing. J Pharmacol Exp Ther 2012; 343:115-24. [PMID: 22767532 DOI: 10.1124/jpet.111.188599] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Skin wound healing is a natural and intricate process that takes place after injury, involving different sequential phases such as hemostasis, inflammatory phase, proliferative phase, and remodeling that are associated with complex biochemical events. The interruption or failure of wound healing leads to chronic nonhealing wounds or fibrosis-associated diseases constituting a major health problem where, unfortunately, medicines are not very effective. The objective of this study was to evaluate the capacity of Cicaderma ointment (Boiron, Lyon, France) to accelerate ulcer closure without fibrosis and investigate wound healing dynamic processes. We used a necrotic ulcer model in mice induced by intradermal doxorubicin injection, and after 11 days, when the ulcer area was maximal, we applied Vaseline petroleum jelly or Cicaderma every 2 days. Topical application of Cicaderma allowed a rapid recovery of mature epidermal structure, a more compact and organized dermis and collagen bundles compared with the Vaseline group. Furthermore, the expression of numerous cytokines/molecules in the ulcer was increased 11 days after doxorubicin injection compared with healthy skin. Cicaderma rapidly reduced the level of proinflammatory cytokines, mainly tumor necrosis factor (TNF)-α and others of the TNF pathway, which can be correlated to a decrease of polymorphonuclear recruitment. It is noteworthy that the modulation of inflammation through TNF-α, macrophage inflammatory protein-1α, interleukin (IL)-12, IL-4, and macrophage-colony-stimulating factor was maintained 9 days after the first ointment application, facilitating the wound closure without affecting angiogenesis. These cytokines seem to be potential targets for therapeutic approaches in chronic wounds. Our results confirm the use of Cicaderma for accelerating skin wound healing and open new avenues for sequential treatments to improve healing.
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Affiliation(s)
- Christophe Morin
- Laboratoire Croissance Cellulaire, Réparation, et Régénération Tissulaires, Équipe d'Accueil Conventionnée, Centre National de la Recherche Scientifique 7149, Université Paris-Est Créteil, Créteil, France.
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Duval S, Siñeriz F, Arlicot N, Barbier-Chassefière V, Vercouillie J, Delbé J, Papy-Garcia D, Guilloteau D, Barritault D. Développement de radiotraceurs pour l’imagerie moléculaire du microenvironnement matriciel tumoral (HIMIMT). Ing Rech Biomed 2012. [DOI: 10.1016/j.irbm.2012.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Hirudin and heparin enable efficient megakaryocyte differentiation of mouse bone marrow progenitors. Exp Cell Res 2011; 318:25-32. [PMID: 22008103 DOI: 10.1016/j.yexcr.2011.10.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 09/12/2011] [Accepted: 10/01/2011] [Indexed: 11/21/2022]
Abstract
Hematopoietic progenitors from murine fetal liver efficiently differentiate in culture into proplatelet-producing megakaryocytes and have proved valuable to study platelet biogenesis. In contrast, megakaryocyte maturation is far less efficient in cultured bone marrow progenitors, which hampers studies in adult animals. It is shown here that addition of hirudin to media containing thrombopoietin and serum yielded a proportion of proplatelet-forming megakaryocytes similar to that in fetal liver cultures (approximately 50%) with well developed extensions and increased the release of platelet particles in the media. The effect of hirudin was maximal at 100 U/ml, and was more pronounced when it was added in the early stages of differentiation. Hirugen, which targets the thrombin anion binding exosite I, and argatroban, a selective active site blocker, also promoted proplatelet formation albeit less efficiently than hirudin. Heparin, an indirect thrombin blocker, and OTR1500, a stable heparin-like synthetic glycosaminoglycan generated proplatelets at levels comparable to hirudin. Heparin with low affinity for antithrombin was equally as effective as standard heparin, which indicates antithrombin independent effects. Use of hirudin and heparin compounds should lead to improved culture conditions and facilitate studies of platelet biogenesis in adult mice.
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29
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Lallam-Laroye C, Baroukh B, Doucet P, Barritault D, Saffar JL, Colombier ML. ReGeneraTing Agents Matrix Therapy Regenerates a Functional Root Attachment in Hamsters with Periodontitis. Tissue Eng Part A 2011; 17:2359-67. [PMID: 21548712 DOI: 10.1089/ten.tea.2010.0696] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Corinne Lallam-Laroye
- Laboratoire Pathologies et Biothérapies de l'Organe Dentaire, Université Paris Descartes, Montrouge, France
| | - Brigitte Baroukh
- Laboratoire Pathologies et Biothérapies de l'Organe Dentaire, Université Paris Descartes, Montrouge, France
| | - Philippe Doucet
- Laboratoire Pathologies et Biothérapies de l'Organe Dentaire, Université Paris Descartes, Montrouge, France
| | - Denis Barritault
- Laboratoire CRRET, CNRS UMR7149, Université Paris-12, Creteil, France
- OTR3, Paris, France
| | - Jean-Louis Saffar
- Laboratoire Pathologies et Biothérapies de l'Organe Dentaire, Université Paris Descartes, Montrouge, France
| | - Marie-Laure Colombier
- Laboratoire Pathologies et Biothérapies de l'Organe Dentaire, Université Paris Descartes, Montrouge, France
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Matrix Therapy with RGTA OTR4120 Improves Healing Time and Quality in Hairless Rats with Deep Second-Degree Burns. Plast Reconstr Surg 2011; 127:541-550. [DOI: 10.1097/prs.0b013e318200a910] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Groah SL, Libin A, Spungen M, Nguyen KL, Woods E, Nabili M, Ramella-Roman J, Barritault D. Regenerating matrix-based therapy for chronic wound healing: a prospective within-subject pilot study. Int Wound J 2011; 8:85-95. [PMID: 21078132 PMCID: PMC7950993 DOI: 10.1111/j.1742-481x.2010.00748.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The aim of this study was to determine whether a skin-specific bioengineered regenerating agent (RGTA) heparan sulphate mimetic (CACIPLIQ20) improves chronic wound healing. The design of this article is a prospective within-subject study. The setting was an urban hospital. Patients were 16 African-American individuals (mean age 42 years) with 22 wounds (mean duration 2.5 years) because of either pressure, diabetic, vascular or burn wounds. Two participants each were lost to follow-up or removed because of poor compliance, resulting in 18 wounds analysed. Sterile gauze was soaked with CACIPLIQ20 saline solution, placed on the wound for 5 min, then removed twice weekly for 4 weeks. Wounds were otherwise treated according to the standard of care. Twenty-two percent of wounds fully healed during the treatment period. Wounds showed a 15.2-18.1% decrease in wound size as measured by the vision engineering research group (VERG) digital wound measurement system and total PUSH scores, respectively, at 4 weeks (P = 0.014 and P = 0.003). At 8 weeks there was an 18-26% reduction in wound size (P = 0.04) in the remaining patients. Wound-related pain measured by the visual analogue pain scale and the wound pain scale declined 60% (P = 0.024) and 70% (P = 0.001), respectively. Patient and clinician satisfaction remained positive throughout the treatment period. It is concluded that treatment with CACIPLIQ20 significantly improved wound-related pain and may facilitate wound healing. Patient and clinician satisfaction remained high throughout the trial.
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Affiliation(s)
- Suzanne L Groah
- SCI Research Center, National Rehabilitation Hospital, Washington, DC 20010, USA.
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Ikeda Y, Charef S, Ouidja MO, Barbier-Chassefière V, Sineriz F, Duchesnay A, Narasimprakash H, Martelly I, Kern P, Barritault D, Petit E, Papy-Garcia D. Synthesis and biological activities of a library of glycosaminoglycans mimetic oligosaccharides. Biomaterials 2011; 32:769-76. [DOI: 10.1016/j.biomaterials.2010.09.043] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Accepted: 09/19/2010] [Indexed: 11/26/2022]
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33
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Barritault D, Garcia-Filipe S, Zakine G. Les bases de la thérapie matricielle en médecine régénérative par les RGTA® : du fondamental à la chirurgie plastique. ANN CHIR PLAST ESTH 2010; 55:413-20. [DOI: 10.1016/j.anplas.2010.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Accepted: 09/02/2010] [Indexed: 10/19/2022]
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Tong M, Tuk B, Hekking IM, Vermeij M, Barritault D, van Neck JW. Stimulated neovascularization, inflammation resolution and collagen maturation in healing rat cutaneous wounds by a heparan sulfate glycosaminoglycan mimetic, OTR4120. Wound Repair Regen 2010; 17:840-52. [PMID: 19903305 DOI: 10.1111/j.1524-475x.2009.00548.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Heparan sulfate glycosaminoglycans (HS-GAGs) are not only the structural elements of tissue architecture but also regulate the bioavailability and transduction pathways of heparan sulfate-bound polypeptides released by cells or the extracellular matrix. Heparan sulfate-bound polypeptides include inflammatory mediators, chemokines, angiogenic factors, morphogens, and growth-promoting factors that induce cell migration, proliferation, and differentiation in wound healing. OTR4120, a polymer engineered to mimic the properties of HS-GAGs, is used to replace the natural HS-GAGs that are degraded during wound repair, and enhance the tissue regeneration by preserving the cellular microenvironment and the endogenous signals needed for tissue regeneration. We previously demonstrated that OTR4120 treatment had a long-term effect on increasing breaking strength and vasodilation in healing rat full-thickness excisional wounds. The present study investigates the underlying mechanisms of the effects of OTR4120 treatment in improving the quality of cutaneous wound repair. We found that OTR4120 treatment stimulated inflammation resolution and increased neovascularization. OTR4120 treatment also promoted epidermal migration and proliferation during reepithelialization. Moreover, the granulation tissue formation and collagen maturation were improved in OTR4120-treated wounds. Three months after wounding, the effects of OTR4120 treatment on vascularization and inflammation resolution were normalized, except for an improved neodermis. We conclude that OTR4120 is a potential matrix therapeutic agent that ensures the quality of normal cutaneous wound repair and may restore impaired wound healing characterized by deficient angiogenesis and prolonged inflammation.
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Affiliation(s)
- Miao Tong
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center, Rotterdam, The Netherlands
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