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He P, Wang D, Zheng R, Wang H, Fu L, Tang G, Shi Z, Wu Y, Yang G. An antibacterial biologic patch based on bacterial cellulose for repair of infected hernias. Carbohydr Polym 2024; 333:121942. [PMID: 38494213 DOI: 10.1016/j.carbpol.2024.121942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 03/19/2024]
Abstract
Infection-associated complications and repair failures and antibiotic resistance have emerged as a formidable challenge in hernia repair surgery. Consequently, the development of antibiotic-free antibacterial patches for hernia repair has become an exigent clinical necessity. Herein, a GBC/Gel/LL37 biological patch (biopatch) with exceptional antibacterial properties is fabricated by grafting 2-Methacryloyloxyethyl trimethylammonium chloride (METAC), a unique quaternary ammonium salt with vinyl, onto bacterial cellulose (GBC), followed by compounding with gelatin (Gel) and LL37. The GBC/Gel/LL37 biopatch exhibits stable swelling capacity, remarkable mechanical properties, flexibility, and favorable biocompatibility. The synergistic effect of METAC and LL37 confers upon the GBC/Gel/LL37 biopatch excellent antibacterial efficacy against Staphylococcus aureus and Escherichia coli, effectively eliminating invading bacteria without the aid of exogenous antibiotics in vivo while significantly reducing local acute inflammation caused by infection. Furthermore, the practical efficacy of the GBC/Gel/LL37 biopatch is evaluated in an infected ventral hernia model, revealing that the GBC/Gel/LL37 biopatch can prevent the formation of visceral adhesions, facilitate the repair of infected ventral hernia, and effectively mitigate chronic inflammation. The prepared antibacterial GBC/Gel/LL37 biopatch is very effective in dealing with the risk of infection in hernia repair surgery and offers potential clinical opportunities for other soft injuries, exhibiting considerable clinical application prospects.
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Affiliation(s)
- Pengyu He
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Dawei Wang
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, Hubei, China
| | - Ruizhu Zheng
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Hao Wang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Lina Fu
- College of Medicine, Huanghuai University, Zhumadian, Henan 463000, China; Zhumadian Central Hospital, Zhumadian, Henan 463000, China
| | - Guoliang Tang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhijun Shi
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Yiping Wu
- Department of Plastic and Cosmetic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan 430030, Hubei, China.
| | - Guang Yang
- Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
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Collins RA, Dang M, McReynolds S, Puckett Y, Ronaghan CA. Use of a dynamic tissue system and biological xenograft in complex traumatic wound closure. J Wound Care 2023; 32:S12-S15. [PMID: 37682802 DOI: 10.12968/jowc.2023.32.sup9.s12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/10/2023]
Abstract
OBJECTIVE Asymmetrical dimensions and nonlinear margins of a multilayered traumatic wound often preclude healing via primary intention. We present the case of an otherwise healthy 21-year-old male who sustained trauma following a boating accident. METHOD The patient sustained three lacerations to the posterior thighs from the boat propeller. The most extensive wound measured 25×10×6cm of muscle extrusion with a divot fracture involving the posterior femur. RESULTS Primary closure and restoration of muscle biomechanics was achieved using a combination of a dynamic tissue system (DTS) and porcine urinary bladder matrix (PUBM) xenograft. After 24 days of treatment in hospital, the patient was discharged without the need for home health, outpatient wound care, or ongoing negative pressure wound therapy. The patient recovered full function of the legs and was cleared for participation in all activities. CONCLUSION This complex traumatic boat propeller injury presented many challenges, including a transverse orientation on the extremity, degree of muscle injury/extrusion, and significant soft tissue loss. The combined application of a DTS with PUBM biological xenograft achieved a primary myocutaneous closure without the need for skin graft or flap reconstruction by plastic surgery.
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Affiliation(s)
- Reagan A Collins
- Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, US
| | - Michael Dang
- Texas Tech University Health Sciences Center, School of Medicine, Lubbock, TX, US
| | - Shirley McReynolds
- Texas Tech University Health Sciences Center, Department of Surgery, Lubbock, TX, US
| | - Yana Puckett
- West Virginia University School of Medicine, Department of Surgery, Charleston, WV, US
| | - Catherine A Ronaghan
- Texas Tech University Health Sciences Center, Department of Surgery, Lubbock, TX, US
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Deering TF, Catanzaro JN, Woodard DA. Physician antibiotic hydration preferences for biologic antibacterial envelopes during cardiac implantable device procedures. Front Cardiovasc Med 2022; 9:1006091. [PMID: 36620632 PMCID: PMC9815182 DOI: 10.3389/fcvm.2022.1006091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
Background Cardiac implantable electronic device (CIED) infection is a potentially serious complication of CIED procedures. Infection risk mitigation includes using guideline-recommended pre-operative intravenous antibacterial prophylaxis (IV ABX). The use of antibiotic-eluting CIED envelopes has also been shown to reduce infection risk. The relationship between and potential benefits associated with guideline-recommended IV ABX in combination with antibacterial envelopes have not been characterized. Methods Biologic envelopes made from non-crosslinked extracellular matrix (ECM) were implanted into 1,102 patients receiving CIEDs. The implanting physician decided patient selection for using a biologic envelope and envelope hydration solution. Observational data was analyzed on IV ABX utilization rates, antibacterial envelope usage, and infection outcomes. Results Overall compliance with IV ABX was 96.6%, and most patients received a biologic envelope hydrated in antibiotics (77.1%). After a mean follow-up of 223 days, infection rates were higher for sites using IV ABX <80% of the time vs. sites using ≥80% (5.6% vs. 0.8%, p = 0.008). Physicians demonstrated preference for hydration solutions containing gentamicin in higher-risk patients, which was found by multivariate analysis to be associated with a threefold reduction in infection risk (OR 3.0, 95% CI, 1.0-10.0). Conclusion These findings suggest that use of antibiotics, particularly gentamicin, in biologic envelope hydration solution may reduce infection risk, and use of antibacterial envelopes without adjunct IV ABX may not be sufficient to reduce CIED infections. Clinical trial registration [https://clinicaltrials.gov/], identifier [NCT02530970].
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Affiliation(s)
- Thomas F. Deering
- Department of Cardiology, Piedmont Heart Institute, Atlanta, GA, United States,*Correspondence: Thomas F. Deering,
| | - John N. Catanzaro
- Division of Cardiology, Department of Medicine, UF Health Cardiovascular Center, Jacksonville, FL, United States
| | - David A. Woodard
- Department of Cardiology, Piedmont Heart Institute, Atlanta, GA, United States
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Woodard DA, Kim G, Nilsson KR. Risk Profiles and Outcomes of Patients Receiving Cardiovascular Implantable Electronic Devices With and Without Antibacterial Envelopes. Cureus 2022; 14:e24739. [PMID: 35686253 PMCID: PMC9170375 DOI: 10.7759/cureus.24739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2022] [Indexed: 11/05/2022] Open
Abstract
Background The increasing use of cardiac implantable electronic devices (CIEDs) in a growing patient population has led to an even greater increase in CIED infection rates. Antibacterial CIED envelopes are often used as part of an infection risk-reduction strategy. However, best practices for when to use an envelope and which envelope to choose remain to be elucidated. Methods In this retrospective study, the records of 455 patients undergoing CIED implantation by a single surgeon were reviewed to identify trends in envelope use and outcomes after implantation through 12 months of follow-up. Of these patients, 165 were managed with a biologic antibacterial CIED envelope (CanGaroo®, Aziyo Biologics, Inc., Silver Spring, MD), 219 with a non-biologic envelope (Tyrx®, Medtronic Inc., Monmouth Junction, NJ), and 71 with no envelope. Results Most patients had two or more infection risk factors (77.9% with any envelope vs. 52.1% with no envelope; P < 0.001). Factors significantly associated with the use of an envelope included the history of heart failure, systemic anticoagulant use, the use of high-power or more complex devices, and reoperations. The overall rate of adverse events was 9.2% (n = 42). Rates of infection and hematoma were 1.8% and 2.6%, respectively. A decision tree is proposed that may aid clinical decision-making when considering CIED envelope usage. Conclusions There were no significant differences between groups in overall or individual adverse event rates. These data provide insight into real-world clinical decisions regarding the use of CIED envelopes and support the use of antibiotic-eluting CIED envelopes to limit infection risk in high-risk patients.
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Lin Q, Zhang X, Yang D, Liu CH, Huleihel L, Remlinger N, Gilbert T, Di YPP. Treatment with a Urinary Bladder Matrix Alters the Innate Host Response to Pneumonia Induced by Escherichia coli. ACS Biomater Sci Eng 2021; 7:1088-1099. [PMID: 33528242 DOI: 10.1021/acsbiomaterials.0c01090] [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: 02/01/2023]
Abstract
Escherichia coli has become the prominent cause of nosocomial pneumonia in recent years. In the meantime, some strains of E. coli have developed resistance to commonly used antibacterial drugs. The urinary bladder matrix (UBM) is a biologically derived scaffold material that has been used to promote site-appropriate tissue remodeling in a variety of body systems, partially through the modulation of the innate immune response. In this study, we seek to determine UBM efficacy in preventing bacterial pneumonia in mouse lungs using the Gram-negative bacterial strain E. coli. Our results show that the UBM prevented bacterial biofilm formation in both abiotic and biotic conditions through experimentation on polystyrene plates and culture on the apical surface of differentiated airway epithelial cells. Intratracheal treatment with UBM led to host protection from E. coli-induced respiratory infection in a murine pneumonia model. Transcriptomic analysis revealed the involvement of the enhanced host immune response in UBM-treated mice. Additionally, UBM-treated macrophages had an increased iNOS expression and enhanced phagocytosis activity. Therefore, the protection against E. coli-induced infection and the antibacterial function observed by UBM is potentially through both the anti-biofilm activity and enhanced host immunity following UBM treatment. Taken together, our results support further investigation of UBM as an alternative treatment to attenuate bacterial-induced respiratory infection.
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Affiliation(s)
- Qiao Lin
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Xiaoping Zhang
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Dandan Yang
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Chia-Hsin Liu
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Luai Huleihel
- ACell, Inc., 6640 Eli Whitney Drive, Columbia, Maryland 21046, United States.,McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| | - Nathaniel Remlinger
- ACell, Inc., 6640 Eli Whitney Drive, Columbia, Maryland 21046, United States
| | - Thomas Gilbert
- ACell, Inc., 6640 Eli Whitney Drive, Columbia, Maryland 21046, United States
| | - Yuan-Pu Peter Di
- Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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Sohail MR, Esquer Garrigos Z, Elayi CS, Xiang K, Catanzaro JN. Preclinical evaluation of efficacy and pharmacokinetics of gentamicin containing extracellular-matrix envelope. Pacing Clin Electrophysiol 2020; 43:341-349. [PMID: 32067241 PMCID: PMC7155100 DOI: 10.1111/pace.13888] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 02/09/2020] [Indexed: 12/28/2022]
Abstract
BACKGROUND Using synthetic antibiotic-eluting envelope (ABE) is an effective intervention for prevention of cardiovascular implantable electronic device (CIED) infection. The biologic extracellular-matrix envelope (ECME), may offer potential advantages over the synthetic ABE. To further minimize the risk of infection, the ECME can be hydrated in gentamicin prior to CIED implantation. We aimed to evaluate the efficacy and pharmacokinetics (PK) of gentamicin containing ECME in an animal model. METHODS For all experiments, the ECME was hydrated in gentamicin (40 mg/Ml) (treatment) for 2 min. In vitro antimicrobial efficacy against six different bacterial species was assessed. In vivo experiments were conducted using a rabbit model of CIED pocket infection. Serum and ECM gentamicin concentrations were measured. Five different organisms were inoculated into the device pocket of control (ECME hydrated in 0.9% saline) and treatment groups. Macroscopic appearance and colony forming units from CIED, ECME, and tissue were determined. RESULTS No bacteria were recovered from any culture after 12 h of exposure to the gentamicin containing ECME. Serum gentamicin levels dropped below the limit of quantification at 15 h after implant. Gentamicin concentration in the ECME remained relatively stable for up to 7 days. Signs of clinical infection were observed in the control but not in the treatment group. In the presence of gentamicin, statistically significant reduction was demonstrated across all tested bacterial species. CONCLUSIONS In this preclinical animal infection model, gentamicin containing ECME was highly effective in reducing bacterial burden in the implant pocket, while systemic exposure after implantation remained low.
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Affiliation(s)
- M. Rizwan Sohail
- Division of Infectious DiseasesDepartment of MedicineMayo Clinic College of Medicine and ScienceRochesterMinnesota
- Department of Cardiovascular DiseasesMayo Clinic College of Medicine and ScienceRochesterMinnesota
| | - Zerelda Esquer Garrigos
- Division of Infectious DiseasesDepartment of MedicineMayo Clinic College of Medicine and ScienceRochesterMinnesota
| | - Claude S. Elayi
- Department of CardiologyUniversity of Florida Health JacksonvilleJacksonvilleFlorida
| | - Kun Xiang
- Department of CardiologyUniversity of Florida Health JacksonvilleJacksonvilleFlorida
| | - John N. Catanzaro
- Department of CardiologyUniversity of Florida Health JacksonvilleJacksonvilleFlorida
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Antimicrobial Properties of Extracellular Matrix Scaffolds for Tissue Engineering. BIOMED RESEARCH INTERNATIONAL 2019; 2019:9641456. [PMID: 31911931 PMCID: PMC6930736 DOI: 10.1155/2019/9641456] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/13/2019] [Accepted: 10/08/2019] [Indexed: 12/16/2022]
Abstract
The necessity to manufacture graft materials with superior biocompatibility capabilities and biodegradability characteristics for tissue regeneration has led to the production of extracellular matrix- (ECM-) based scaffolds. Among their advantages are better capacity to allow cell colonization, which enables its successful integration into the tissue surrounding the area to be repaired. In addition, it has been shown that some of these scaffolds have antimicrobial activity, preventing possible infections; therefore, it could be used as an alternative to control surgical infection and decrease the use of antimicrobial agents. The purpose of this review is to collect the existing information about antimicrobial activity of the ECM and their components.
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Costa A, Adamo S, Gossetti F, D'Amore L, Ceci F, Negro P, Bruzzone P. Biological Scaffolds for Abdominal Wall Repair: Future in Clinical Application? MATERIALS 2019; 12:ma12152375. [PMID: 31349716 PMCID: PMC6695954 DOI: 10.3390/ma12152375] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/22/2019] [Accepted: 07/24/2019] [Indexed: 12/11/2022]
Abstract
Millions of abdominal wall repair procedures are performed each year for primary and incisional hernias both in the European Union and in the United States with extremely high costs. Synthetic meshes approved for augmenting abdominal wall repair provide adequate mechanical support but have significant drawbacks (seroma formation, adhesion to viscera, stiffness of abdominal wall, and infection). Biologic scaffolds (i.e., derived from naturally occurring materials) represent an alternative to synthetic surgical meshes and are less sensitive to infection. Among biologic scaffolds, extracellular matrix scaffolds promote stem/progenitor cell recruitment in models of tissue remodeling and, in the specific application of abdominal wall repair, have enough mechanical strength to support the repair. However, many concerns remain about the use of these scaffolds in the clinic due to their higher cost of production compared with synthetic meshes, despite having the same recurrence rate. The present review aims to highlight the pros and cons of using biologic scaffolds as surgical devices for abdominal wall repair and present possible improvements to widen their use in clinical practice.
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Affiliation(s)
- Alessandra Costa
- Sezione di Istologia ed Embriologia Medica, Dipartimento SAIMLAL, Sapienza Università di Roma, Via A. Scarpa 16, 00161 Rome, Italy
| | - Sergio Adamo
- Sezione di Istologia ed Embriologia Medica, Dipartimento SAIMLAL, Sapienza Università di Roma, Via A. Scarpa 16, 00161 Rome, Italy
| | - Francesco Gossetti
- Dipartimento Assistenziale Integrato Cardio Toraco-Vascolare, Chirurgia e Trapianti d'Organo, Azienda Ospedaliera Universitaria Policlinico Umberto I. Dipartimento Universitario Chirurgia Generale e Specialistica "Paride Stefanini", Sapienza Università di Roma, Viale del Policlinico 155, 00161 Rome, Italy
| | - Linda D'Amore
- Dipartimento Assistenziale Integrato Cardio Toraco-Vascolare, Chirurgia e Trapianti d'Organo, Azienda Ospedaliera Universitaria Policlinico Umberto I. Dipartimento Universitario Chirurgia Generale e Specialistica "Paride Stefanini", Sapienza Università di Roma, Viale del Policlinico 155, 00161 Rome, Italy
| | - Francesca Ceci
- Dipartimento Assistenziale Integrato Cardio Toraco-Vascolare, Chirurgia e Trapianti d'Organo, Azienda Ospedaliera Universitaria Policlinico Umberto I. Dipartimento Universitario Chirurgia Generale e Specialistica "Paride Stefanini", Sapienza Università di Roma, Viale del Policlinico 155, 00161 Rome, Italy
| | - Paolo Negro
- Dipartimento Assistenziale Integrato Cardio Toraco-Vascolare, Chirurgia e Trapianti d'Organo, Azienda Ospedaliera Universitaria Policlinico Umberto I. Dipartimento Universitario Chirurgia Generale e Specialistica "Paride Stefanini", Sapienza Università di Roma, Viale del Policlinico 155, 00161 Rome, Italy
| | - Paolo Bruzzone
- Dipartimento Assistenziale Integrato Cardio Toraco-Vascolare, Chirurgia e Trapianti d'Organo, Azienda Ospedaliera Universitaria Policlinico Umberto I. Dipartimento Universitario Chirurgia Generale e Specialistica "Paride Stefanini", Sapienza Università di Roma, Viale del Policlinico 155, 00161 Rome, Italy.
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A critical review of the in vitro and in vivo models for the evaluation of anti-infective meshes. Hernia 2018; 22:961-974. [PMID: 30168006 DOI: 10.1007/s10029-018-1807-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 08/18/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Infectious complications following mesh implantation for abdominal wall repair appear in 0.7 up to 26.6% of hernia repairs and can have a detrimental impact for the patient. To prevent or to treat mesh-related infection, the scientific community is currently developing a veritable arsenal of antibacterial meshes. The numerous and increasing reports published every year describing new technologies indicate a clear clinical need, and an academic interest in solving this problem. Nevertheless, to really appreciate, to challenge, to compare and to optimize the antibacterial properties of next generation meshes, it is important to know which models are available and to understand them. PURPOSE We proposed for the first time, a complete overview focusing only on the in vitro and in vivo models which have been employed specifically in the field of antibacterial meshes for hernia repair. RESULTS AND CONCLUSION From this investigation, it is clear that there has been vast progress and breadth in new technologies and models to test them. However, it also shows that standardization or adoption of a more restricted number of models would improve comparability and be a benefit to the field of study.
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10
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Qiu W, Zhong C, Xu R, Zou T, Wang F, Fan Y, Wang L, Yang Z. Novel large-pore lightweight polypropylene mesh has better biocompatibility for rat model of hernia. J Biomed Mater Res A 2018; 106:1269-1275. [DOI: 10.1002/jbm.a.36326] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/10/2017] [Accepted: 12/21/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Wangwang Qiu
- Department of General Surgery; Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yi-Shan Road; Shanghai 200233 People's Republic of China
| | - Cheng Zhong
- Department of Materials Science; Shanghai Jiao Tong University, 800 Dongchuan Road; Shanghai 200240 People's Republic of China
| | - Rui Xu
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 People's Republic of China
| | - Ting Zou
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 People's Republic of China
| | - Fujun Wang
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 People's Republic of China
| | - Youben Fan
- Department of General Surgery; Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yi-Shan Road; Shanghai 200233 People's Republic of China
| | - Lu Wang
- Key Laboratory of Textile Science and Technology; Ministry of Education, College of Textiles, Donghua University; Shanghai 201620 People's Republic of China
| | - Zhili Yang
- Department of General Surgery; Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yi-Shan Road; Shanghai 200233 People's Republic of China
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Poornejad N, Schaumann LB, Buckmiller EM, Momtahan N, Gassman JR, Ma HH, Roeder BL, Reynolds PR, Cook AD. The impact of decellularization agents on renal tissue extracellular matrix. J Biomater Appl 2016; 31:521-533. [PMID: 27312837 DOI: 10.1177/0885328216656099] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The combination of patient-specific cells with scaffolds obtained from natural sources may result in improved regeneration of human tissues. Decellularization of the native tissue is the first step in this technology. Effective decellularization uses agents that lyse cells and remove all cellular materials, leaving intact collagenous extracellular matrices (ECMs). Removing cellular remnants prevents an immune response while preserving the underlying structure. In this study, the impact of five decellularization agents (0.1 N NaOH, 1% peracetic acid, 3% Triton X-100, 1% sodium dodecyl sulfate (SDS), and 0.05% trypsin/EDTA) on renal tissue was examined using slices of porcine kidneys. The NaOH solution induced the most efficient cell removal, and resulted in the highest amount of cell viability and proliferation after recellularization, although it also produced the most significant damage to collagenous fiber networks, glycosaminoglycans (GAGs) and fibroblast growth factor (FGF). The SDS solution led to less severe damage to the ECM structure but it resulted in lower metabolic activity and less proliferation. Peracetic acid and Triton X-100 resulted in minimum disruption of ECMs and the most preserved GAGs and FGF. However, these last two agents were not as efficient in removing cellular materials as NaOH and SDS, especially peracetic acid, which left more than 80% of cellular material within the ECM. As a proof of principle, after completing the comparison studies using slices of renal ECM, the NaOH process was used to decellularize a whole kidney, with good results. The overall results demonstrate the significant effect of cell lysing agents and the importance of developing an optimized protocol to avoid extensive damage to the ECM while retaining the ability to support cell growth.
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Affiliation(s)
- Nafiseh Poornejad
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
| | - Lara B Schaumann
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
| | - Evan M Buckmiller
- Department of Genetics and Biotechnology, Brigham Young University, Provo, UT, USA
| | - Nima Momtahan
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
| | - Jason R Gassman
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, UT, USA
| | - Ho Hin Ma
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, UT, USA
| | | | - Paul R Reynolds
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, UT, USA
| | - Alonzo D Cook
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
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Huang CL, Chen YB, Lo YL, Lin YH. Development of chitosan/β-glycerophosphate/glycerol hydrogel as a thermosensitive coupling agent. Carbohydr Polym 2016; 147:409-414. [PMID: 27178947 DOI: 10.1016/j.carbpol.2016.04.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 03/15/2016] [Accepted: 04/06/2016] [Indexed: 11/29/2022]
Abstract
This work develops a dual-function thermosensitive hydrogel to prevent overheating, a side effect of focused ultrasound therapy. The proposed hydrogel has the components of chitosan, β-glycerophosphate, and glycerol. Its thermosensitive sol-to-gel transition gives an instant signal of overheating without the need of any awkward sensing device. Impacts of varying component concentrations on the sol-to-gel temperature, rate, and degree of transparency are also investigated. Chemical structures and ultrasonic coefficients after heating are obtained with a Fourier transform infrared spectroscopy and ultrasonic measurement, respectively. Optimized formula of the proposed hydrogel is 0.5% chitosan, 5% β-glycerophosphate, and 25% glycerol. This hydrogel has a high acoustic impedance (Z=1.8 Mrayl) close to that of human skin, high ultrasonic transmission (T=99%, which is normalized to water) from 25 to 55°C, and low attenuation coefficient (α=4.0Np/m). These properties assure the success of dual functions of the hydrogel developed in this work.
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Affiliation(s)
- Chih-Ling Huang
- Department of Mechanical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan; Center for Fundamental Science, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yu-Bin Chen
- Department of Mechanical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan.
| | - Yu-Lung Lo
- Department of Mechanical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan; Advanced Optoelectronic Technology Center, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
| | - Yi-Hsiang Lin
- Department of Mechanical Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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Systemic inflammatory cytokine analysis to monitor biomaterial augmented tissue healing. Int J Artif Organs 2016; 38:651-8. [PMID: 26847499 DOI: 10.5301/ijao.5000450] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2015] [Indexed: 11/20/2022]
Abstract
PURPOSE Hernias can be repaired by reinforcement of damaged fascia using biomaterials to provide stabilisation. Repair materials are usually porous, through which cells infiltrate, proliferate and secrete ECM. Their efficacy relies on good tissue integration and resolution of host defence mechanisms. Therefore, understanding the dynamics by which biomaterials interact with tissue will provide knowledge to advance prosthesis design. Furthermore, determining host response in real time would provide significant advantage both clinically and scientifically over the current terminal process of histology. METHODS 3 materials comprising synthetic and composite (synthetic materials hybridised with a resorbable biologic component) meshes were implanted into a rat full-thickness abdominal wall excision model. Their efficacy was evaluated using histopathology whilst also monitoring systemic concentrations of cytokines associated with inflammation and wound healing to predict material outcome over 12 weeks. RESULTS The noncomposite material (polyester) and Material B (polypropylene mesh with oligocaprone film and polydioxanone glue) stimulated the largest degree of adhesion from the 3 materials tested, although after 28 days adhesions were stronger to Material B. Histologically, all 3 materials integrated well with abdominal musculature and infiltrated completely with cells. CONCLUSIONS Analysis of systemic inflammation biomarkers confirmed inflammation elicited by surgeries and meshes irrespective of their composition. However, at an early postoperative endpoint (i.e., 1 week), some biomarkers, namely, IL-18 and RANTES, appeared to discriminate the noncomposite mesh from the composite materials, although in this study all materials successfully repaired the defects without recurrence or external indicators of postoperative chronic pain.
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Aamodt JM, Grainger DW. Extracellular matrix-based biomaterial scaffolds and the host response. Biomaterials 2016; 86:68-82. [PMID: 26890039 DOI: 10.1016/j.biomaterials.2016.02.003] [Citation(s) in RCA: 297] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 01/30/2016] [Accepted: 02/01/2016] [Indexed: 01/08/2023]
Abstract
Extracellular matrix (ECM) collectively represents a class of naturally derived proteinaceous biomaterials purified from harvested organs and tissues with increasing scientific focus and utility in tissue engineering and repair. This interest stems predominantly from the largely unproven concept that processed ECM biomaterials as natural tissue-derived matrices better integrate with host tissue than purely synthetic biomaterials. Nearly every tissue type has been decellularized and processed for re-use as tissue-derived ECM protein implants and scaffolds. To date, however, little consensus exists for defining ECM compositions or sources that best constitute decellularized biomaterials that might better heal, integrate with host tissues and avoid the foreign body response (FBR). Metrics used to assess ECM performance in biomaterial implants are arbitrary and contextually specific by convention. Few comparisons for in vivo host responses to ECM implants from different sources are published. This review discusses current ECM-derived biomaterials characterization methods including relationships between ECM material compositions from different sources, properties and host tissue response as implants. Relevant preclinical in vivo models are compared along with their associated advantages and limitations, and the current state of various metrics used to define material integration and biocompatibility are discussed. Commonly applied applications of these ECM-derived biomaterials as stand-alone implanted matrices and devices are compared with respect to host tissue responses.
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Affiliation(s)
- Joseph M Aamodt
- Department of Bioengineering, University of Utah, Salt Lake City, UT, 84112-5820, USA
| | - David W Grainger
- Department of Bioengineering, University of Utah, Salt Lake City, UT, 84112-5820, USA; Department of Pharmaceutics and Pharmaceutical Chemistry University of Utah, Salt Lake City, UT, 84112-5820, USA.
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Pérez-Köhler B, Bayon Y, Bellón JM. Mesh Infection and Hernia Repair: A Review. Surg Infect (Larchmt) 2015; 17:124-37. [PMID: 26654576 DOI: 10.1089/sur.2015.078] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND The use of a prosthetic mesh to repair a tissue defect may produce a series of post-operative complications, among which infection is the most feared and one of the most devastating. When occurring, bacterial adherence and biofilm formation on the mesh surface affect the implant's tissue integration and host tissue regeneration, making preventive measures to control prosthetic infection a major goal of prosthetic mesh improvement. METHODS This article reviews the literature on the infection of prosthetic meshes used in hernia repair to describe the in vitro and in vivo models used to examine bacterial adherence and biofilm formation on the surface of different biomaterials. Also discussed are the prophylactic measures used to control implant infection ranging from meshes soaked in antibiotics to mesh coatings that release antimicrobial agents in a controlled manner. RESULTS Prosthetic architecture has a direct effect on bacterial adherence and biofilm formation. Absorbable synthetic materials are more prone to bacterial colonization than non-absorbable materials. The reported behavior of collagen biomeshes, also called xenografts, in a contaminated environment has been contradictory, and their use in this setting needs further clinical investigation. New prophylactic mesh designs include surface modifications with an anti-adhesive substance or pre-treatment with antibacterial agents or metal coatings. CONCLUSIONS The use of polymer coatings that slowly release non-antibiotic drugs seems to be a good strategy to prevent implant contamination and reduce the onset of resistant bacterial strains. Even though the prophylactic designs described in this review are mainly focused on hernia repair meshes, these strategies can be extrapolated to other implantable devices, regardless of their design, shape or dimension.
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Affiliation(s)
- Bárbara Pérez-Köhler
- 1 Department of Surgery, Medical and Social Sciences. Faculty of Medicine and Health Sciences. University of Alcalá . Madrid, Spain .,2 Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Yves Bayon
- 3 Covidien - Sofradim Production , Trévoux, France
| | - Juan Manuel Bellón
- 1 Department of Surgery, Medical and Social Sciences. Faculty of Medicine and Health Sciences. University of Alcalá . Madrid, Spain .,2 Networking Research Center on Bioengineering , Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
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Developing Extracellular Matrix Technology to Treat Retinal or Optic Nerve Injury(1,2,3). eNeuro 2015; 2:eN-REV-0077-15. [PMID: 26478910 PMCID: PMC4603254 DOI: 10.1523/eneuro.0077-15.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 09/04/2015] [Accepted: 09/09/2015] [Indexed: 12/30/2022] Open
Abstract
Adult mammalian CNS neurons often degenerate after injury, leading to lost neurologic functions. In the visual system, retinal or optic nerve injury often leads to retinal ganglion cell axon degeneration and irreversible vision loss. CNS axon degeneration is increasingly linked to the innate immune response to injury, which leads to tissue-destructive inflammation and scarring. Extracellular matrix (ECM) technology can reduce inflammation, while increasing functional tissue remodeling, over scarring, in various tissues and organs, including the peripheral nervous system. However, applying ECM technology to CNS injuries has been limited and virtually unstudied in the visual system. Here we discuss advances in deriving fetal CNS-specific ECMs, like fetal porcine brain, retina, and optic nerve, and fetal non-CNS-specific ECMs, like fetal urinary bladder, and the potential for using tissue-specific ECMs to treat retinal or optic nerve injuries in two platforms. The first platform is an ECM hydrogel that can be administered as a retrobulbar, periocular, or even intraocular injection. The second platform is an ECM hydrogel and polymer "biohybrid" sheet that can be readily shaped and wrapped around a nerve. Both platforms can be tuned mechanically and biochemically to deliver factors like neurotrophins, immunotherapeutics, or stem cells. Since clinical CNS therapies often use general anti-inflammatory agents, which can reduce tissue-destructive inflammation but also suppress tissue-reparative immune system functions, tissue-specific, ECM-based devices may fill an important need by providing naturally derived, biocompatible, and highly translatable platforms that can modulate the innate immune response to promote a positive functional outcome.
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Iorio T, Blumberg D. Short-Term Results of Treating Primary and Recurrent Anal Fistulas with a Novel Extracellular Matrix Derived from Porcine Urinary Bladder. Am Surg 2015. [DOI: 10.1177/000313481508100532] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Anal fistulas are difficult to treat because they are often recalcitrant to medical therapies and surgical treatment may lead to significant morbidities. A recent novel biologically derived graft from porcine urinary bladder (MatriStem™) has shown great promise in experimental studies of tissue regeneration in diverse tissues. The objectives of this study were to evaluate the safety and short-term efficacy of MatriStem for treatment of anal fistulas. This was a retrospective study of patients treated from January 3, 2012 to March 3, 2014 at the University of Pittsburgh Medical Center. MatriStem was used to treat patients with anal fistulas by implanting it uniformly with a single application in all patients using a standardized protocol. Data were collected retrospectively from hospital records and office charts. Nineteen fistulas were treated with MatriStem. There were no adverse complications. Overall efficacy of MatriStem was 79 per cent with healing occurring in a mean time of 17 days and mean follow-up of seven months (range 1–26 months). MatriStem was effective in healing in 75 per cent of primary anal fistulas and 86 per cent of recurrent fistulas. MatriStem seems to be a safe and promising treatment for primary and recurrent anal fistulas, and warrants further study and clinical trials to substantiate widespread clinical use.
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Affiliation(s)
- Tara Iorio
- Bandaid Surgery, PC, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - David Blumberg
- Bandaid Surgery, PC, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
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Afaneh C, Abelson J, Schattner M, Janjigian YY, Ilson D, Yoon SS, Strong VE. Esophageal reinforcement with an extracellular scaffold during total gastrectomy for gastric cancer. Ann Surg Oncol 2014; 22:1252-7. [PMID: 25319574 DOI: 10.1245/s10434-014-4125-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Indexed: 01/21/2023]
Abstract
BACKGROUND Esophagojejunal (EJ) anastomotic leaks after total gastrectomy (TG) for malignancy lead to significant morbidity and mortality, thus affecting long-term survival. Preclinical and clinical trials have shown promise in utilizing degradable extracellular matrix (ECM) scaffolds in buttressing anastomoses. We describe our experience buttressing the EJ anastomosis after TG with a ECM scaffold. METHODS From February 2012 to January 2014, a total of 37 consecutive patients underwent TG buttressing of the EJ anastomosis with the degradable ECM scaffold composed of a porcine urinary bladder called MatriStem (ACell Inc.). The scaffold was circumferentially wrapped around the EJ anastomosis. The primary end point was the EJ leak rate, while the secondary end point was the EJ stricture rate. RESULTS The mean ± SD age and body mass index were 59 ± 16 years and 28.1 ± 4.9 kg/m(2), respectively. Most patients were male (51 %), white (78 %), and former smokers (51 %). Over half (59 %) underwent neoadjuvant chemotherapy. A minimally invasive TG was performed in 70 % of patients. Signet ring was the most common tumor type (48 %), and most patients had midstage disease (59 %). The mean number of lymph nodes procured was 36 ± 16. Eighteen patients (49 %) experienced a complication, mostly minor. One patient (2.7 %) developed an EJ leak, while three patients (8 %) developed an EJ stricture. Median follow-up was 7 months (range 2-12 months). There was no operative or in-hospital mortality. DISCUSSION The use of urinary bladder matrix scaffolds may be helpful in decreasing the incidence of EJ anastomotic leak and/or stricture. A prospective phase II trial at our institution is currently under way.
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Affiliation(s)
- Cheguevara Afaneh
- Department of Surgery, Gastric and Mixed Tumor Service, Memorial Sloan-Kettering Cancer Center and Weill Cornell Medical College, New York, NY, USA
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García-Pumarino R, Pascual G, Rodríguez M, Pérez-Köhler B, Bellón JM. Do collagen meshes offer any benefits over preclude® ePTFE implants in contaminated surgical fields? A comparativein vitroandin vivostudy. J Biomed Mater Res B Appl Biomater 2013; 102:366-75. [DOI: 10.1002/jbm.b.33015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 07/05/2013] [Accepted: 07/27/2013] [Indexed: 11/07/2022]
Affiliation(s)
- Rubén García-Pumarino
- Department of Surgery; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Faculty of Medicine, Alcalá University; Ctra. Madrid-Barcelona Alcalá de Henares Madrid Spain
| | - Gemma Pascual
- Department of Medical Specialities; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Faculty of Medicine, Alcalá University; Ctra. Madrid-Barcelona Alcalá de Henares Madrid Spain
| | - Marta Rodríguez
- Department of Surgery; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Faculty of Medicine, Alcalá University; Ctra. Madrid-Barcelona Alcalá de Henares Madrid Spain
| | - Bárbara Pérez-Köhler
- Department of Medical Specialities; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Faculty of Medicine, Alcalá University; Ctra. Madrid-Barcelona Alcalá de Henares Madrid Spain
| | - Juan Manuel Bellón
- Department of Surgery; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Faculty of Medicine, Alcalá University; Ctra. Madrid-Barcelona Alcalá de Henares Madrid Spain
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Wolf MT, Carruthers CA, Dearth CL, Crapo PM, Huber A, Burnsed OA, Londono R, Johnson SA, Daly KA, Stahl EC, Freund JM, Medberry CJ, Carey LE, Nieponice A, Amoroso NJ, Badylak SF. Polypropylene surgical mesh coated with extracellular matrix mitigates the host foreign body response. J Biomed Mater Res A 2013; 102:234-46. [PMID: 23873846 DOI: 10.1002/jbm.a.34671] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 02/15/2013] [Accepted: 02/19/2013] [Indexed: 12/19/2022]
Abstract
Surgical mesh devices composed of synthetic materials are commonly used for ventral hernia repair. These materials provide robust mechanical strength and are quickly incorporated into host tissue; factors that contribute to reduced hernia recurrence rates. However, such mesh devices cause a foreign body response with the associated complications of fibrosis and patient discomfort. In contrast, surgical mesh devices composed of naturally occurring extracellular matrix (ECM) are associated with constructive tissue remodeling, but lack the mechanical strength of synthetic materials. A method for applying a porcine dermal ECM hydrogel coating to a polypropylene mesh is described herein with the associated effects upon the host tissue response and biaxial mechanical behavior. Uncoated and ECM coated heavy-weight BARD™ Mesh were compared to the light-weight ULTRAPRO™ and BARD™ Soft Mesh devices in a rat partial thickness abdominal defect overlay model. The ECM coated mesh attenuated the pro-inflammatory response compared to all other devices, with a reduced cell accumulation and fewer foreign body giant cells. The ECM coating degraded by 35 days, and was replaced with loose connective tissue compared to the dense collagenous tissue associated with the uncoated polypropylene mesh device. Biaxial mechanical characterization showed that all of the mesh devices were of similar isotropic stiffness. Upon explanation, the light-weight mesh devices were more compliant than the coated or uncoated heavy-weight devices. This study shows that an ECM coating alters the default host response to a polypropylene mesh, but not the mechanical properties in an acute in vivo abdominal repair model.
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Affiliation(s)
- Matthew T Wolf
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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He M, Callanan A. Comparison of methods for whole-organ decellularization in tissue engineering of bioartificial organs. TISSUE ENGINEERING PART B-REVIEWS 2012; 19:194-208. [PMID: 23083305 DOI: 10.1089/ten.teb.2012.0340] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Organ transplantation is now a well-established procedure for the treatment of end-stage organ failure due to various causes, but is a victim of its own success in that there is a growing disparity in numbers between the donor organ pool available for transplantation and the patients eligible for such a procedure; hence, an alternative solution to the limited donor organ pool is both desirable and necessary. Tissue engineering is an interdisciplinary field that applies the principles of engineering and life sciences toward the development of functional replacement tissues for clinical use. A recent innovation in tissue and organ engineering is the technique of whole-organ decellularization, which allows the production of complex three-dimensional extracellular matrix (ECM) bioscaffolds of the entire organ with preservation of the intrinsic vascular network. These bioscaffolds can then be recellularized to create potentially functional organ constructs as a regenerative medicine strategy for organ replacement. We review the current applications and methods in using xenogeneic whole-organ ECM scaffolds to create potentially functional bioartificial organ constructs for surgical implantation, and present a comparison of specific trends within this new and developing technique.
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Affiliation(s)
- Ming He
- Department of Bioengineering and Materials, Institute of Biomedical Engineering, Imperial College London, London, United Kingdom.
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22
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Callanan A, Davis NF, Walsh MT, McGloughlin TM. Mechanical characterisation of unidirectional and cross-directional multilayered urinary bladder matrix (UBM) scaffolds. Med Eng Phys 2012; 34:1368-74. [DOI: 10.1016/j.medengphy.2012.06.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 06/20/2012] [Accepted: 06/28/2012] [Indexed: 10/28/2022]
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Tran N, Tran PA. Nanomaterial-based treatments for medical device-associated infections. Chemphyschem 2012; 13:2481-94. [PMID: 22517627 DOI: 10.1002/cphc.201200091] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 03/30/2012] [Indexed: 11/07/2022]
Abstract
Bacterial infections remain one of the biggest concerns to our society. Conventional antibiotic treatments showed little effect on the increasing number of antibiotic-resistant bacteria. Advances in synthetic chemistry and nanotechnology have resulted in a new class of nanometer-scale materials with distinguished properties and great potential to be an alternative for antibiotics. In this Minireview, we address the current situation of medical-device-associated infections and the emerging opportunities for antibacterial nanomaterials in preventing these complications. Several important antimicrobial nanomaterials emergent from advances in synthesis chemistry are introduced and their bactericidal mechanisms are analyzed. In addition, concerns regarding the biocompatibility of such materials are also addressed.
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Affiliation(s)
- Nhiem Tran
- Department of Orthopaedics, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI 02903, USA.
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Agrawal V, Tottey S, Johnson SA, Freund JM, Siu BF, Badylak SF. Recruitment of progenitor cells by an extracellular matrix cryptic peptide in a mouse model of digit amputation. Tissue Eng Part A 2011; 17:2435-43. [PMID: 21563860 DOI: 10.1089/ten.tea.2011.0036] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Biologic scaffolds composed of extracellular matrix (ECM) have been used successfully in preclinical models and humans for constructive remodeling of functional, site-appropriate tissue after injury. The mechanisms underlying ECM-mediated constructive remodeling are not completely understood, but scaffold degradation and site-directed recruitment of both differentiated and progenitor cells are thought to play critical roles. Previous studies have shown that degradation products of ECM scaffolds can recruit a population of progenitor cells both in vitro and in vivo. The present study identified a single cryptic peptide derived from the α subunit of the collagen III molecule that is chemotactic for a well-characterized perivascular stem cell in vitro and causes the site-directed accumulation of progenitor cells in vivo. The oligopeptide was additionally chemotactic for human cortical neural stem cells, rat adipocyte stem cells, C2C12 myoblast cells, and rat Schwann cells in vitro. In an adult murine model of digit amputation, treatment with this peptide after mid-second phalanx amputation resulted in a greater number of Sox2+ and Sca1+,Lin- cells at the site of injury compared to controls. Since progenitor cell activation and recruitment are key prerequisites for epimorphic regeneration in adult mammalian tissues, endogenous site-directed recruitment of such cells has the potential to alter the default wound healing response from scar tissue toward regeneration.
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Affiliation(s)
- Vineet Agrawal
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
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