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Kaur G, Narayanan G, Garg D, Sachdev A, Matai I. Biomaterials-Based Regenerative Strategies for Skin Tissue Wound Healing. ACS APPLIED BIO MATERIALS 2022; 5:2069-2106. [PMID: 35451829 DOI: 10.1021/acsabm.2c00035] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Skin tissue wound healing proceeds through four major stages, including hematoma formation, inflammation, and neo-tissue formation, and culminates with tissue remodeling. These four steps significantly overlap with each other and are aided by various factors such as cells, cytokines (both anti- and pro-inflammatory), and growth factors that aid in the neo-tissue formation. In all these stages, advanced biomaterials provide several functional advantages, such as removing wound exudates, providing cover, transporting oxygen to the wound site, and preventing infection from microbes. In addition, advanced biomaterials serve as vehicles to carry proteins/drug molecules/growth factors and/or antimicrobial agents to the target wound site. In this review, we report recent advancements in biomaterials-based regenerative strategies that augment the skin tissue wound healing process. In conjunction with other medical sciences, designing nanoengineered biomaterials is gaining significant attention for providing numerous functionalities to trigger wound repair. In this regard, we highlight the advent of nanomaterial-based constructs for wound healing, especially those that are being evaluated in clinical settings. Herein, we also emphasize the competence and versatility of the three-dimensional (3D) bioprinting technique for advanced wound management. Finally, we discuss the challenges and clinical perspective of various biomaterial-based wound dressings, along with prospective future directions. With regenerative strategies that utilize a cocktail of cell sources, antimicrobial agents, drugs, and/or growth factors, it is expected that significant patient-specific strategies will be developed in the near future, resulting in complete wound healing with no scar tissue formation.
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Affiliation(s)
- Gurvinder Kaur
- Materials Science and Sensor Applications, Central Scientific Instruments Organization, Chandigarh 160030, India
| | - Ganesh Narayanan
- Fiber and Polymer Science Program, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Deepa Garg
- Materials Science and Sensor Applications, Central Scientific Instruments Organization, Chandigarh 160030, India
| | - Abhay Sachdev
- Materials Science and Sensor Applications, Central Scientific Instruments Organization, Chandigarh 160030, India
| | - Ishita Matai
- Department of Biotechnology, School of Biological Sciences, Amity University Punjab, Mohali 140306, India
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Saraiva S, Pereira P, Paula CT, Rebelo RC, Coelho JFJ, Serra AC, Fonseca AC. Development of electrospun mats based on hydrophobic hydroxypropyl cellulose derivatives. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112498. [PMID: 34857284 DOI: 10.1016/j.msec.2021.112498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 10/06/2021] [Accepted: 10/13/2021] [Indexed: 12/21/2022]
Abstract
In this work, hydroxypropyl cellulose esters (HPCE) with long aliphatic chains were prepared and innovatively used in electrospinning to obtain hydroxypropyl cellulose (HPC)-based mats with enhanced resistance to moist environments. The described approach is very simple and does not require any post-treatment (e.g. cross-linking step) to overcome a major problem concerning the premature loss of properties of cellulose-based materials when in contact with moisture. HPCE-based electrospun mats were characterized in terms of their morphology, swelling ability and in vitro hydrolytic degradation. The mats exhibited a swelling capacity of over 115%, depending on the degree of substitution. The in vitro hydrolytic degradation tests showed the high structural integrity of the mats (< 5% weight loss) over a period of 30 days. The in vitro cytotoxicity tests showed that the mats of HPC esters are cytocompatible and promote the adhesion, proliferation and spreading of NIH3T3 fibroblast cells. These data suggest that the HPCE mats may be interesting materials for wound dressings, as well as for other tissue engineering applications.
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Affiliation(s)
- Sofia Saraiva
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal
| | - Patrícia Pereira
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal; IPN, Instituto Pedro Nunes, Associação para a Inovação e Desenvolvimento em Ciência e Tecnologia, Rua Pedro Nunes, 3030-199 Coimbra, Portugal
| | - C T Paula
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal
| | - R C Rebelo
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal
| | - Jorge F J Coelho
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal
| | - Arménio C Serra
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal
| | - Ana C Fonseca
- University of Coimbra, CEMMPRE, Department of Chemical Engineering, Rua Sílvio Lima- Pólo II, 3030-290 Coimbra, Portugal.
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Kakabadze MZ, Paresishvili T, Mardaleishvili K, Vadachkoria Z, Kipshidze N, Jangavadze M, Karalashvili L, Ghambashidze K, Chakhunashvili D, Kakabadze Z. Local drug delivery system for the treatment of tongue squamous cell carcinoma in rats. Oncol Lett 2021; 23:13. [PMID: 34820012 PMCID: PMC8607325 DOI: 10.3892/ol.2021.13131] [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: 08/02/2021] [Accepted: 10/11/2021] [Indexed: 12/14/2022] Open
Abstract
The present study describes a local drug delivery system with two functions, which can suppress tumor growth and accelerate wound healing. Thе system consists of a two-layer multicomponent fibrin-based gel (MCPFTG). The internal layer of MCPFTG, which is in direct contact with the wound surface, contains cisplatin placed on a CultiSpher-S collagen microcarrier. The external layer of MCPFTG consists of a CultiSpher-S microcarrier with lyophilized bone marrow stem cells (BMSCs). The efficacy of MCPFTG was evaluated in a rat model of squamous cell carcinoma of the tongue created with 4-nitroquinoline 1-oxide. The results of the study showed that, within 20–25 days, a non-healing wound of the tongue was formed in animals that underwent only 85% resection of squamous cell carcinoma, while rapid progression of the residual tumor was concomitantly observed. Immunohistochemical methods revealed high expression of cyclin D1 and low expression of E-cadherin in these animals. Additionally, high expression of p63 and Ki-67 was noted. In 80% of animals with squamous cell carcinoma of the tongue that were treated with MCPFTG after 85% tumor resection, a noticeable suppression of tumor growth was evident throughout 150 days, and tumor recurrence was not detected. Immunohistochemistry revealed low or moderate expression of cyclin D1, and high expression of E-cadherin throughout the whole observation period. The MCPFTG-based local drug delivery system was shown to be effective in suppressing tumor growth and preventing recurrence. MCPFTG decreased the toxicity of cisplatin and enhanced its antitumor activity. In addition, lyophilized paracrine BMSC factors present in MCPFTG accelerated wound healing after tumor removal. Thus, the present study suggests novel opportunities for the development of a multifunctional drug delivery system for the treatment of squamous cell carcinoma.
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Affiliation(s)
- Mariam Z Kakabadze
- Department of Clinical Anatomy and Operative Surgery, Iv. Javakhishvili Tbilisi State University, 0179 Tbilisi, Georgia
| | - Teona Paresishvili
- Department of Clinical Anatomy, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | | | - Zurab Vadachkoria
- Department of Child and Adolescent Maxillo-facial Surgery and Surgical Stomatology, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | - Nicholas Kipshidze
- Department of Interventional Cardiology, Cardiovascular Research Foundation, New York, NY 10019, USA
| | - Mikheil Jangavadze
- Department of Clinical Anatomy and Operative Surgery, Iv. Javakhishvili Tbilisi State University, 0179 Tbilisi, Georgia
| | - Lia Karalashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | - Ketevan Ghambashidze
- Department of Clinical Anatomy, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | - David Chakhunashvili
- Department of Clinical Anatomy, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | - Zurab Kakabadze
- Department of Clinical Anatomy, Tbilisi State Medical University, 0186 Tbilisi, Georgia
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Autologous fibrin sealant application in cardiac surgery - a single-centre observational study. POLISH JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2021; 18:75-79. [PMID: 34386047 PMCID: PMC8340632 DOI: 10.5114/kitp.2021.107467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/11/2021] [Indexed: 11/17/2022]
Abstract
Introduction To minimize the risk of blood loss and post-transfusion complications in patients undergoing cardiovascular surgery, different strategies are used. Aim To analyse the efficacy of the intraoperative use of autologous fibrin glue to seal suture lines of cardiac and vascular structures. Material and methods The early results of 62 patients who underwent complex cardiac operations in extracorporeal circulation were analysed. In a half of them Vivostat autologous fibrin sealant in addition to the routine haemostatic agents was applied (study group), whereas in the second group (matched-pair control group) only standard haemostatics were used. Among many other factors, special attention was paid to postoperative drainage and blood products used. Results The mean age of the patients and prevalence of comorbidities did not differ between groups. Generally, in the study group fewer haemostatic agents were used. For example, Preveleak tissue glue was applied in 3.2% of studied cases compared to one third of control patients (p = 0.008). The thoracic drainage on either day 0 or day 1 was also similar. The number of patients who received blood products did not differ between groups. More importantly, there were no significant differences in in-hospital mortality and prevalence of other postoperative complications. Conclusions In this study it was found that application of autologous fibrin glue was safe and might limit use of standard haemostatic agents. Taking into account the lack of potential threats related to the transmission of infections and immune responses, it may be an interesting alternative to the previously used local haemostatics.
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Juncos Bombin AD, Dunne NJ, McCarthy HO. Electrospinning of natural polymers for the production of nanofibres for wound healing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:110994. [PMID: 32993991 DOI: 10.1016/j.msec.2020.110994] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/16/2020] [Accepted: 04/18/2020] [Indexed: 02/07/2023]
Abstract
Wound healing is a highly regulated process composed of four overlapping phases: (1) coagulation/haemostasis, (2) inflammation, (3) proliferation and (4) remodelling. Comorbidities such as advanced age, diabetes and obesity can impair natural tissue repair, rendering the wound in a pathological state of inflammation. This results in significant discomfort for patients and considerable financial costs for healthcare systems. Due to the complex nature of wound healing, current treatments are ineffective at dealing with delayed healing. With flexible properties that can be tailored, nanomaterials have emerged as alternative therapeutics for many biomedical applications. A nanofibrous network can be made via electrospinning polymers using a high electric field to create a responsive meshwork that can be used as a medical dressing. A nanofibrous device has properties that can overcome the limitations of traditional dressings, such as: (1) adaptability to wound contour; (2) controlled drug delivery of therapeutics; (3) gaseous exchange; (4) exudate absorption and (5) surface functionalisation to further enhance the biological activity of the dressing. This review details emerging trends in nanotechnology to specifically target wound healing applications. Particular focus is given to the most common natural polymers that could address many unmet healthcare needs.
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Affiliation(s)
| | - Nicholas J Dunne
- School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland; Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin 2, Ireland; Advanced Manufacturing Research Centre (I-Form), School of Mechanical and Manufacturing Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland.; Advanced Processing Technology Research Centre, Dublin City University, Dublin 9, Ireland.; Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland..
| | - Helen O McCarthy
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
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Hemostasis and Safety of a Novel Fibrin Dressing Versus Standard Gauze in Bleeding Cancellous Bone in a Caprine Spine Surgery Model. Spine Deform 2017; 5:310-313. [PMID: 28882348 DOI: 10.1016/j.jspd.2017.03.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 03/05/2017] [Accepted: 03/10/2017] [Indexed: 11/23/2022]
Abstract
BACKGROUND Decorticated bone is a significant source of blood loss in scoliosis surgery. Current hemostatic methods include packed gauze (GS), physical barriers such as bone wax, and xenograft collagen-based materials. We assessed the safety and efficacy of a novel fibrin dressing (dextran-thrombin-fibrinogen [DTF]) compared to GS. This dressing comprises lyophilized thrombin and fibrinogen embedded in an elastic electrospun nanofiber dextran matrix. PURPOSE The study tests the hypothesis that DTF is more efficacious than GS in control of bleeding from cancellous bone. STUDY DESIGN A preclinical Good Laboratory Practices (GLP) study. METHODS We enrolled 10 goats that were followed for 28 ± 1 days. Each animal was randomly assigned to the test or control group. Both test and control animals had 4 cancellous bone injuries. Test animal injuries were treated with DTF, whereas standard GS was used to control bleeding in the control animals. Bleeding at the bone injury site was characterized as either none, oozing, flowing, or pulsatile and was assessed at 4 and 8 minutes after dressing application. Goats were survived 28 ± 1 days and then necropsied. RESULTS Application of the fibrin dressing to bleeding cancellous bone, both posterior spinal lamina, and iliac crest graft sites, resulted in control of bleeding within 4 minutes at all injury sites. Eighty percent of control injury sites continued to bleed after 8 minutes and required application of bone wax to control bleeding. There were no differences in prothrombin time, partial thromboplastin time, or fibrinogen levels between test and control animals at 1 or 28 days. We observed no adverse histologic reactions at 28 days. CONCLUSION The fibrin dressing is an efficacious and safe method of controlling blood loss from cancellous bone in a spine surgery model.
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Electrospun water-stable zein/ethyl cellulose composite nanofiber and its drug release properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 74:86-93. [DOI: 10.1016/j.msec.2017.02.004] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/22/2016] [Accepted: 02/03/2017] [Indexed: 02/07/2023]
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Chaudhari AA, Vig K, Baganizi DR, Sahu R, Dixit S, Dennis V, Singh SR, Pillai SR. Future Prospects for Scaffolding Methods and Biomaterials in Skin Tissue Engineering: A Review. Int J Mol Sci 2016; 17:E1974. [PMID: 27898014 PMCID: PMC5187774 DOI: 10.3390/ijms17121974] [Citation(s) in RCA: 294] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/21/2016] [Accepted: 11/22/2016] [Indexed: 01/17/2023] Open
Abstract
Over centuries, the field of regenerative skin tissue engineering has had several advancements to facilitate faster wound healing and thereby restoration of skin. Skin tissue regeneration is mainly based on the use of suitable scaffold matrices. There are several scaffold types, such as porous, fibrous, microsphere, hydrogel, composite and acellular, etc., with discrete advantages and disadvantages. These scaffolds are either made up of highly biocompatible natural biomaterials, such as collagen, chitosan, etc., or synthetic materials, such as polycaprolactone (PCL), and poly-ethylene-glycol (PEG), etc. Composite scaffolds, which are a combination of natural or synthetic biomaterials, are highly biocompatible with improved tensile strength for effective skin tissue regeneration. Appropriate knowledge of the properties, advantages and disadvantages of various biomaterials and scaffolds will accelerate the production of suitable scaffolds for skin tissue regeneration applications. At the same time, emphasis on some of the leading challenges in the field of skin tissue engineering, such as cell interaction with scaffolds, faster cellular proliferation/differentiation, and vascularization of engineered tissues, is inevitable. In this review, we discuss various types of scaffolding approaches and biomaterials used in the field of skin tissue engineering and more importantly their future prospects in skin tissue regeneration efforts.
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Affiliation(s)
- Atul A Chaudhari
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | - Komal Vig
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | | | - Rajnish Sahu
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | - Saurabh Dixit
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | - Vida Dennis
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | - Shree Ram Singh
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
| | - Shreekumar R Pillai
- Center for Nanobiotechnology Research, Alabama State University, Montgomery, AL 36104, USA.
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Law AY, Butler JR, Patnaik SS, Cooley JA, Elder SH. Biomechanical Testing and Histologic Examination of Intradermal Skin Closure in Dogs Using Barbed Suture Device and Non-Barbed Monofilament Suture. Vet Surg 2016; 46:59-66. [DOI: 10.1111/vsu.12576] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 07/27/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Andy Y. Law
- Department of Clinical Sciences, College of Veterinary Medicine; Mississippi State University; Mississippi State, Mississippi
| | - James R. Butler
- Department of Clinical Sciences, College of Veterinary Medicine; Mississippi State University; Mississippi State, Mississippi
| | - Sourav S. Patnaik
- Department of Agricultural and Biological Engineering, Bagley College of Engineering; Mississippi State University; Mississippi State, Mississippi
| | - James A. Cooley
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine; Mississippi State University; Mississippi State, Mississippi
| | - Steven H. Elder
- Department of Agricultural and Biological Engineering, Bagley College of Engineering; Mississippi State University; Mississippi State, Mississippi
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Comparison of Topical Hemostatic Agents in a Swine Model of Extremity Arterial Hemorrhage: BloodSTOP iX Battle Matrix vs. QuikClot Combat Gauze. Int J Mol Sci 2016; 17:545. [PMID: 27077848 PMCID: PMC4849001 DOI: 10.3390/ijms17040545] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Revised: 04/01/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022] Open
Abstract
BloodSTOP iX Battle Matrix (BM) and QuikClot Combat Gauze (CG) have both been used to treat traumatic bleeding. The purpose of this study was to examine the efficacy and initial safety of both products in a swine extremity arterial hemorrhage model, which mimics combat injury. Swine (37.13 ± 0.56 kg, NBM = 11, NCG = 9) were anesthetized and splenectomized. We then isolated the femoral arteries and performed a 6 mm arteriotomy. After 45 s of free bleeding, either BM or CG was applied. Fluid resuscitation was provided to maintain a mean arterial pressure of 65 mmHg. Animals were observed for three hours or until death. Fluoroscopic angiography and wound stability challenge tests were performed on survivors. Tissue samples were collected for histologic examination. Stable hemostasis was achieved in 11/11 BM and 5/9 CG subjects, with recovery of mean arterial pressure and animal survival for three hours (p < 0.05, Odds Ratio (OR) = 18.82 (0.85–415.3)). Time to stable hemostasis was shorter for the BM-treated group (4.8 ± 2.5 min vs. 58 ± 20.1 min; Median = 2, Interquartile Range (IQR) = 0 min vs. Median = 60, IQR = 120 min; p < 0.05) and experienced longer total stable hemostasis (175.2 ± 2.5 min vs. 92.4 ± 29.9 min; Median = 178, IQR = 0 min vs. Median = 120, IQR = 178 min; p < 0.05). Post-treatment blood loss was lower with BM (9.5 ± 2.4 mL/kg, Median = 10.52, IQR = 13.63 mL/kg) compared to CG (29.9 ± 9.9 mL/kg, Median = 29.38, IQR = 62.44 mL/kg) (p = 0.2875). Standard BM products weighed less compared to CG (6.9 ± 0.03 g vs. 20.2 ± 0.4 g) (p < 0.05) and absorbed less blood (3.4 ± 0.8 g vs. 41.9 ± 12.3 g) (p < 0.05). Fluoroscopic angiography showed recanalization in 5/11 (BM) and 0/5 (CG) surviving animals (p = 0.07, OR = 9.3 (0.41–208.8)). The wound stability challenge test resulted in wound re-bleeding in 1/11 (BM) and 5/5 (CG) surviving animals (p < 0.05, OR = 0.013 (0.00045–0.375)). Histologic evidence indicated no wound site, distal limb or major organ damage in either group. BM is more effective and portable in treating arterial hemorrhage compared to CG. There was no histologic evidence of further damage in either group.
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Poehnert D, Abbas M, Maegel L, Sambale F, Lavrentieva A, Kreipe HH, Klempnauer J, Winny M. Evaluation of the biological tolerability of the starch-based medical device 4DryField® PH in vitro and in vivo a rat model. J Biomater Appl 2015; 30:463-71. [PMID: 26116021 DOI: 10.1177/0885328215592257] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
PURPOSE To evaluate in vitro cytotoxicity/biocompatibility as well as in vivo tolerability of the novel polysaccharide 4DryField® PH, certified for haemostasis and adhesion prevention. METHODS In vitro cytotoxicity/viability testing according to ISO EN 10,993 using murine and human tumour cell lines incubated with 4DryField® PH (PlantTec Medical GmbH). Using a rat model the impact of 4DryField® PH on animals viability and in vivo effects were macro- and micropathologically assessed. RESULTS In vitro testing revealed no cytotoxic effect of 4DryField® PH nor enhancement of viability to tumour cell lines. In vivo viability of rats was unimpaired by 4DryField® PH. Bodyweight loss in animals with abdominal injury plus treatment with 4DryField® PH was in the range of controls and less than in injured rats without treatment. At day 7 after surgery no formation of adhesions, neither macroscopic nor histological remnants nor signs of foreign body reaction were present in animals without injury. In animals with peritoneal injury and 4DryField® PH application, histopathological observation revealed minor residuals of polysaccharide in the depth of wound cavity embedded in a thickened subperitoneal layer; however, with a suggested intact neoperitoneum. The presence of mononuclear cells surrounding polysaccharide particles in varying states of degradation was observable as well. CONCLUSION 4DryField® PH is not cytotoxic and does not enhance viability of tumour cell lines. High dose of 4DryField® PH of 1.09 g/kg bodyweight is well tolerated and reduces weight loss in animals with peritoneal injury. The biocompatibility of 4DryField® PH can be rated as being excellent.
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Affiliation(s)
- Daniel Poehnert
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| | - Mahmoud Abbas
- Department of Pathology, Hannover Medical School, Germany
| | - Lavinia Maegel
- Department of Pathology, Hannover Medical School, Germany
| | - Franziska Sambale
- Institute of Technical Chemistry, Leibniz University Hannover, Germany
| | | | | | - Jürgen Klempnauer
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
| | - Markus Winny
- Department of General, Abdominal and Transplantation Surgery, Hannover Medical School, Germany
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Natural and synthetic polymers for wounds and burns dressing. Int J Pharm 2013; 463:127-36. [PMID: 24368109 DOI: 10.1016/j.ijpharm.2013.12.015] [Citation(s) in RCA: 577] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/10/2013] [Accepted: 12/14/2013] [Indexed: 12/15/2022]
Abstract
In the last years, health care professionals faced with an increasing number of patients suffering from wounds and burns difficult to treat and heal. During the wound healing process, the dressing protects the injury and contributes to the recovery of dermal and epidermal tissues. Because their biocompatibility, biodegradability and similarity to macromolecules recognized by the human body, some natural polymers such as polysaccharides (alginates, chitin, chitosan, heparin, chondroitin), proteoglycans and proteins (collagen, gelatin, fibrin, keratin, silk fibroin, eggshell membrane) are extensively used in wounds and burns management. Obtained by electrospinning technique, some synthetic polymers like biomimetic extracellular matrix micro/nanoscale fibers based on polyglycolic acid, polylactic acid, polyacrylic acid, poly-ɛ-caprolactone, polyvinylpyrrolidone, polyvinyl alcohol, polyethylene glycol, exhibit in vivo and in vitro wound healing properties and enhance re-epithelialization. They provide an optimal microenvironment for cell proliferation, migration and differentiation, due to their biocompatibility, biodegradability, peculiar structure and good mechanical properties. Thus, synthetic polymers are used also in regenerative medicine for cartilage, bone, vascular, nerve and ligament repair and restoration. Biocompatible with fibroblasts and keratinocytes, tissue engineered skin is indicated for regeneration and remodeling of human epidermis and wound healing improving the treatment of severe skin defects or partial-thickness burn injuries.
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Volk SW, Bohling MW. Comparative wound healing--are the small animal veterinarian's clinical patients an improved translational model for human wound healing research? Wound Repair Regen 2013; 21:372-81. [PMID: 23627643 DOI: 10.1111/wrr.12049] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Accepted: 02/28/2013] [Indexed: 11/28/2022]
Abstract
Despite intensive research efforts into understanding the pathophysiology of both chronic wounds and scar formation, and the development of wound care strategies to target both healing extremes, problematic wounds in human health care remain a formidable challenge. Although valuable fundamental information regarding the pathophysiology of problematic wounds can be gained from in vitro investigations and in vivo studies performed in laboratory animal models, the lack of concordance with human pathophysiology has been cited as a major impediment to translational research in human wound care. Therefore, the identification of superior clinical models for both chronic wounds and scarring disorders should be a high priority for scientists who work in the field of human wound healing research. To be successful, translational wound healing research should function as an intellectual ecosystem in which information flows from basic science researchers using in vitro and in vivo models to clinicians and back again from the clinical investigators to the basic scientists. Integral to the efficiency of this process is the incorporation of models which can accurately predict clinical success. The aim of this review is to describe the potential advantages and limitations of using clinical companion animals (primarily dogs and cats) as translational models for cutaneous wound healing research by describing comparative aspects of wound healing in these species, common acute and chronic cutaneous wounds in clinical canine and feline patients, and the infrastructure that currently exists in veterinary medicine which may facilitate translational studies and simultaneously benefit both veterinary and human wound care patients.
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Affiliation(s)
- Susan W Volk
- Department of Clinical Studies and Animal Biology, School of Veterinary Medicine, The University of Pennsylvania, Philadelphia 19104-4539, USA.
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Anatomical and histological examination of the porcine vagina and supportive structures: in search of an ideal model for pelvic floor disorder evaluation and management. Female Pelvic Med Reconstr Surg 2012; 17:110-4. [PMID: 22453780 DOI: 10.1097/spv.0b013e318214b1a6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE : The objective of the study was to examine the anatomy and histology of the swine vagina and adjacent supportive structures in comparison to human tissues to determine the potential utility of this model for pelvic floor disorder evaluation and management. METHODS : This is a descriptive study of the gross anatomy and histology of the swine vagina, uterosacral ligament, cardinal ligament, and rectovaginal space. Tissue was collected from 6 different sites in each of the 6 animals, processed, and stained with hematoxylin-eosin, Masson trichrome, and van Gieson and evaluated by both gynecologic and veterinary pathologists. RESULTS : Porcine tissues were similar to the human vagina and supporting structures. The origin, insertion, and course of the uterosacral and cardinal ligaments appeared similar to those in humans. Histologically, both the porcine and human vagina and rectum consist of a mucosal, muscular, and adventitial layers. The swine vaginal smooth muscle is arranged in an inner circular and outer longitudinal manner. Collagen, elastin, and smooth muscle were identified in 5 sites. Collagen was highest in the cardinal compared with the uterosacral ligament (P = 0.03), whereas elastin was highest in the uterosacral ligament. The vaginal epithelium measured approximately 40 μm at the vaginal cuff and 50 to 200 μm at anterior and posterior vagina. The swine vagina appeared thinner and contained less elastin. The rectovaginal region contained a smooth muscle layer leading to a thin adventitial layer. CONCLUSIONS : The swine vagina and adjacent supportive structures appear to be grossly and histologically similar to human vaginal anatomy, and these similarities could lead to further investigation of the porcine model in the study of pelvic support and support disorders.
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Sharp KG, Dickson AR, Marchenko SA, Yee KM, Emery PN, Laidmåe I, Uibo R, Sawyer ES, Steward O, Flanagan LA. Salmon fibrin treatment of spinal cord injury promotes functional recovery and density of serotonergic innervation. Exp Neurol 2012; 235:345-56. [PMID: 22414309 DOI: 10.1016/j.expneurol.2012.02.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 01/25/2012] [Accepted: 02/25/2012] [Indexed: 12/19/2022]
Abstract
The neural degeneration caused by spinal cord injury leaves a cavity at the injury site that greatly inhibits repair. One approach to promoting repair is to fill the cavity with a scaffold to limit further damage and encourage regrowth. Injectable materials are advantageous scaffolds because they can be placed as a liquid in the lesion site then form a solid in vivo that precisely matches the contours of the lesion. Fibrin is one type of injectable scaffold, but risk of infection from blood borne pathogens has limited its use. We investigated the potential utility of salmon fibrin as an injectable scaffold to treat spinal cord injury since it lacks mammalian infectious agents and encourages greater neuronal extension in vitro than mammalian fibrin or Matrigel®, another injectable material. Female rats received a T9 dorsal hemisection injury and were treated with either salmon or human fibrin at the time of injury while a third group served as untreated controls. Locomotor function was assessed using the BBB scale, bladder function was analyzed by measuring residual urine, and sensory responses were tested by mechanical stimulation (von Frey hairs). Histological analyses quantified the glial scar, lesion volume, and serotonergic fiber density. Rats that received salmon fibrin exhibited significantly improved recovery of both locomotor and bladder function and a greater density of serotonergic innervation caudal to the lesion site without exacerbation of pain. Rats treated with salmon fibrin also exhibited less autophagia than those treated with human fibrin, potentially pointing to amelioration of sensory dysfunction. Glial scar formation and lesion size did not differ significantly among groups. The pattern and timing of salmon fibrin's effects suggest that it acts on neuronal populations but not by stimulating long tract regeneration. Salmon fibrin clearly has properties distinct from those of mammalian fibrin and is a beneficial injectable scaffold for treatment of spinal cord injury.
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Affiliation(s)
- Kelli G Sharp
- Reeve-Irvine Research Center and Department of Anatomy & Neurobiology, University of California Irvine, Irvine, CA 92697-1705, USA
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Laidmäe I, Belozjorova J, Sawyer ES, Janmey PA, Uibo R. Salmon fibrin glue in rats: Antibody studies. Biologicals 2012; 40:55-60. [DOI: 10.1016/j.biologicals.2011.12.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 12/05/2011] [Accepted: 12/16/2011] [Indexed: 10/14/2022] Open
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Gruber DD, Warner WB, Lombardini ED, Zahn CM, Buller JL. Laparoscopic hysterectomy using various energy sources in swine: a histopathologic assessment. Am J Obstet Gynecol 2011; 205:494.e1-6. [PMID: 21924395 DOI: 10.1016/j.ajog.2011.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 05/13/2011] [Accepted: 07/07/2011] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Analyze energy-induced damage to the swine vagina during laparoscopic hysterectomy. STUDY DESIGN Laparoscopic colpotomy was performed in swine using ultrasonic, monopolar, and bipolar energy. Specimens (n = 22) from 13 swine were stained with hematoxylin and eosin and Masson's trichrome for energy-related damage. The distal scalpel-cut margin was used as reference. Energy induced damage was assessed by gynecologic and veterinary pathologists blinded to energy source. RESULTS Injury was most apparent on Masson's trichrome, demonstrating clear injury demarcation, allowing consistent, quantitative damage measurements. Mean injury was 0 ± 0 μM (scalpel, n = 22), 782 ± 359 μM (ultrasonic, n = 7), 2016 ± 1423 μM (monopolar, n = 8), and 3011 ± 1239 μM (bipolar, n = 7). Using scalpel as the reference, all were significant (P < .001). CONCLUSION All energy sources demonstrated tissue damage, with ultrasonic showing the least and bipolar the greatest. Further study of tissue damage relative to cuff closure at laparoscopic hysterectomy is warranted.
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Affiliation(s)
- Daniel D Gruber
- Department of Obstetrics and Gynecology, Walter Reed Army Medical Center, Washington DC, USA
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Weisshaar CL, Winer JP, Guarino BB, Janmey PA, Winkelstein BA. The potential for salmon fibrin and thrombin to mitigate pain subsequent to cervical nerve root injury. Biomaterials 2011; 32:9738-46. [PMID: 21944723 DOI: 10.1016/j.biomaterials.2011.09.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Accepted: 09/07/2011] [Indexed: 01/23/2023]
Abstract
Nerve root compression is a common cause of radiculopathy and induces persistent pain. Mammalian fibrin is used clinically as a coagulant but presents a variety of risks. Fish fibrin is a potential biomaterial for neural injury treatment because it promotes neurite outgrowth, is non-toxic, and clots readily at lower temperatures. This study administered salmon fibrin and thrombin following nerve root compression and measured behavioral sensitivity and glial activation in a rat pain model. Fibrin and thrombin each significantly reduced mechanical allodynia compared to injury alone (p < 0.02). Painful compression with fibrin exhibited allodynia that was not different from sham for any day using stimulation by a 2 g filament; allodynia was only significantly different (p < 0.043) from sham using the 4 g filament on days 1 and 3. By day 5, responses for fibrin treatment decreased to sham levels. Allodynia following compression with thrombin treatment were unchanged from sham at any time point. Macrophage infiltration at the nerve root and spinal microglial activation were only mildly modified by salmon treatments. Spinal astrocytic expression decreased significantly with fibrin (p < 0.0001) but was unchanged from injury responses for thrombin treatment. Results suggest that salmon fibrin and thrombin may be suitable biomaterials to mitigate pain.
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Affiliation(s)
- Christine L Weisshaar
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104-6321, USA.
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Rothwell SW, Settle T, Wallace S, Dorsey J, Simpson D, Bowman JR, Janmey P, Sawyer E. The long term immunological response of swine after two exposures to a salmon thrombin and fibrinogen hemostatic bandage. Biologicals 2010; 38:619-28. [PMID: 20705479 DOI: 10.1016/j.biologicals.2010.07.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 06/13/2010] [Accepted: 07/06/2010] [Indexed: 10/19/2022] Open
Abstract
Experimental salmon thrombin/fibrinogen dressings have been shown to provide effective hemostasis in severe hemorrhage situations. The hypothesis for this study was that swine would still remain healthy without coagulopathy six months after exposure to salmon thrombin/fibrinogen dressings. Initial exposure was by insertion of the salmon dressing into the peritoneal cavity. Three months after the initial exposure, the same animals were subjected to two full thickness dermal wounds on the dorsal surface. One wound was bandaged with the salmon thrombin/fibrinogen bandage and the other wound was dressed with a standard bandage. The animals were monitored for an additional three months. Blood was drawn every 14 days over the six months for immunological and coagulation function analysis. All of the animals (8 pigs) remained healthy during the six month period and the dermal wounds healed without incidence. Lymph nodes and spleen showed signs of normal immune response and Western blots showed development of antibodies against salmon fibrinogen, but none of the animals made antibodies that recognized any species of thrombin. Coagulation parameters (fibrinogen concentration, thrombin time, PT and aPTT) and hematological parameters remained normal over the course of the study when compared to initial values of the subject swine.
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Affiliation(s)
- Stephen W Rothwell
- Department of Anatomy, Physiology and Genetics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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