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Littérature scientifique sur le sujet « Lyophilization, acellular dermal matrices, wound healing »
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Articles de revues sur le sujet "Lyophilization, acellular dermal matrices, wound healing"
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Petrie, Kyla, Cameron T. Cox, Benjamin C. Becker et Brendan J. MacKay. « Clinical applications of acellular dermal matrices : A review ». Scars, Burns & ; Healing 8 (janvier 2022) : 205951312110383. http://dx.doi.org/10.1177/20595131211038313.
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Introduction The extracellular matrix (ECM) plays an integral role in wound healing. It provides both structure and growth factors that allow for the organised cell proliferation. Large or complex tissue defects may compromise host ECM, creating an environment that is unfavourable for the recovery of anatomical function and appearance. Acellular dermal matrices (ADMs) have been developed from a variety of sources, including human (HADM), porcine (PADM) and bovine (BADM), with multiple different processing protocols. The objective of this report is to provide an overview of current literature assessing the clinical utility of ADMs across a broad spectrum of applications. Methods PubMed, MEDLINE, EMBASE, Scopus, Cochrane and Web of Science were searched using keywords ‘acellular dermal matrix’, ‘acellular dermal matrices’ and brand names for commercially available ADMs. Our search was limited to English language articles published from 1999 to 2020 and focused on clinical data. Results A total of 2443 records underwent screening. After removing non-clinical studies and correspondence, 222 were assessed for eligibility. Of these, 170 were included in our synthesis of the literature. While the earliest ADMs were used in severe burn injuries, usage has expanded to a number of surgical subspecialties and procedures, including orthopaedic surgery (e.g. tendon and ligament reconstructions), otolaryngology, oral surgery (e.g. treating gingival recession), abdominal wall surgery (e.g. hernia repair), plastic surgery (e.g. breast reconstruction and penile augmentation), and chronic wounds (e.g. diabetic ulcers). Conclusion Our understanding of ADM’s clinical utility continues to evolve. More research is needed to determine which ADM has the best outcomes for each clinical scenario. Lay Summary Large or complex wounds present unique reconstructive and healing challenges. In normal healing, the extracellular matrix (ECM) provides both structural and growth factors that allow tissue to regenerate in an organised fashion to close the wound. In difficult or large soft-tissue defects, however, the ECM is often compromised. Acellular dermal matrix (ADM) products have been developed to mimic the benefits of host ECM, allowing for improved outcomes in a variety of clinical scenarios. This review summarises the current clinical evidence regarding commercially available ADMs in a wide variety of clinical contexts.
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Paganelli, A., E. Rossi, A. Naselli, P. Azzoni, L. Bertoni et C. Magnoni. « 618 Acellular Dermal Matrices in Cutaneous Wound Healing : a Longitudinal Comparative Study ». Journal of Investigative Dermatology 142, no 12 (décembre 2022) : S287. http://dx.doi.org/10.1016/j.jid.2022.09.635.
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Kankam, HKN, GJM Hourston, P. Forouhi, M. Di Candia, GC Wishart et CM Malata. « Combination of acellular dermal matrix with a de-epithelialised dermal flap during skin-reducing mastectomy and immediate breast reconstruction ». Annals of The Royal College of Surgeons of England 100, no 8 (novembre 2018) : e197-e202. http://dx.doi.org/10.1308/rcsann.2018.0127.
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IntroductionPatients with large ptotic breasts undergoing immediate implant-based reconstruction often require skin-reducing mastectomy to optimise the aesthetic outcome. However, healing complications, especially at the resulting inverted T-junction, leading to wound dehiscence, infection, skin necrosis, implant exposure and failed reconstruction have been widely reported. We present an innovative approach for immediate implant-based reconstruction combining porcine- or bovine-derived acellular dermal matrices with a de-epithelialised dermal sling to protect and support the implant, while improving clinical outcomes in this challenging group of patients.Materials and methodsDemographic, tumour and surgical data were reviewed for patients undergoing Wise pattern (T-scar) skin-reducing mastectomies with immediate implant-based reconstruction combining porcine- or bovine-derived acellular dermal matrices with a de-epithelialised dermal sling.ResultsThis technique was successfully employed to reconstruct five large pendulous breasts in four breast cancer patients with a median age of 50.5 years (range 34–61 years) who were not suitable for, or had declined, flap-based reconstruction. The acellular dermal matrices used were SurgiMend®, StratticeTMand Braxon® and the expandable implants were placed in the sub-pectoral (n = 3) and pre-pectoral (n = 1) planes. The technical steps and clinical outcomes are presented. One patient experienced T-junction breakdown overlying the de-epithelialised dermis without implant loss.ConclusionThe combination of an acellular dermal matrix and a dermal sling provides a double-layer ‘water-proofing’ and support for the implants inferiorly, avoiding T-junction breakdown complications, since any dehiscence is on to well-vascularised dermis. Furthermore, the acellular dermal matrix stabilises the implant in the large mastectomy cavity (pocket control). This approach provides a viable option which facilitates mastectomy and immediate implant reconstruction in large-breasted patients.
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Lin, Zhikai, Cristina Nica, Anton Sculean et Maria B. Asparuhova. « Enhanced Wound Healing Potential of Primary Human Oral Fibroblasts and Periodontal Ligament Cells Cultured on Four Different Porcine-Derived Collagen Matrices ». Materials 13, no 17 (29 août 2020) : 3819. http://dx.doi.org/10.3390/ma13173819.
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Xenogenic collagen-based matrices represent an alternative to subepithelial palatal connective tissue autografts in periodontal and peri-implant soft tissue reconstructions. In the present study, we aimed to investigate the migratory, adhesive, proliferative, and wound-healing potential of primary human oral fibroblasts (hOF) and periodontal ligament cells (hPDL) in response to four commercially available collagen matrices. Non-crosslinked collagen matrix (NCM), crosslinked collagen matrix (CCM), dried acellular dermal matrix (DADM), and hydrated acellular dermal matrix (HADM) were all able to significantly enhance the ability of hPDL and hOF cells to directionally migrate toward the matrices as well as to efficiently repopulate an artificially generated wound gap covered by the matrices. Compared to NCM and DADM, CCM and HADM triggered stronger migratory response. Cells grown on CCM and HADM demonstrated significantly higher proliferative rates compared to cells grown on cell culture plastic, NCM, or DADM. The pro-proliferative effect of the matrices was supported by expression analysis of proliferative markers regulating cell cycle progression. Upregulated expression of genes encoding the adhesive molecules fibronectin, vinculin, CD44 antigen, and the intracellular adhesive molecule-1 was detected in hPDL and hOF cells cultured on each of the four matrices. This may be considered as a prerequisite for good adhesive properties of the four scaffolds ensuring proper cell–matrix and cell–cell interactions. Upregulated expression of genes encoding TGF-β1 and EGF growth factors as well as MMPs in cells grown on each of the four matrices provided support for their pro-proliferative and pro-migratory abilities. The expression of genes encoding the angiogenic factors FGF-2 and VEGF-A was dramatically increased in cells grown on DADM and HADM only, suggesting a good basis for accelerated vascularization of the latter. Altogether, our results support favorable influence of the investigated collagen matrices on the recruitment, attachment, and growth of cell types implicated in oral soft tissue regeneration. Among the four matrices, HADM has consistently exhibited stronger positive effects on the oral cellular behavior. Our data provide solid basis for future investigations on the clinical application of the collagen-based matrices in surgical periodontal therapy.
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Paganelli, Alessia, Andrea Giovanni Naselli, Laura Bertoni, Elena Rossi, Paola Azzoni, Alessandra Pisciotta, Anna Maria Cesinaro et al. « Wound Healing after Acellular Dermal Substitute Positioning in Dermato-Oncological Surgery : A Prospective Comparative Study ». Life 13, no 2 (7 février 2023) : 463. http://dx.doi.org/10.3390/life13020463.
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Background: MatriDerm and Integra are both widely used collagenic acellular dermal matrices (ADMs) in the surgical setting, with similar characteristics in terms of healing time and clinical indication. The aim of the present study is to compare the two ADMs in terms of clinical and histological results in the setting of dermato-oncological surgery. Methods: Ten consecutive patients with medical indications to undergo surgical excision of skin cancers were treated with a 2-step procedure at our Dermatologic Surgery Unit. Immediately after tumor removal, both ADMs were positioned on the wound bed, one adjacent to the other. Closure through split-thickness skin grafting was performed after approximately 3 weeks. Conventional histology, immunostaining and ELISA assay were performed on cutaneous samples at different timepoints. Results: No significant differences were detected in terms of either final clinical outcomes or in extracellular matrix content of the neoformed dermis. However, Matriderm was observed to induce scar retraction more frequently. In contrast, Integra was shown to carry higher infectious risk and to be more slowly reabsorbed into the wound bed. Sometimes foreign body-like granulomatous reactions were also observed, especially in Integra samples. Conclusions: Even in the presence of subtle differences between the ADMs, comparable global outcomes were demonstrated after dermato-oncological surgery.
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Carlson, Terri L., Karen W. Lee et Lisa M. Pierce. « Influence of Acellular Dermal Matrices on the Expression of Mediators Involved in Wound Healing and Tissue Remodeling ». Plastic and Reconstructive Surgery 130 (novembre 2012) : 68–69. http://dx.doi.org/10.1097/01.prs.0000421782.31287.9e.
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Paganelli, A., L. Benassi, E. Rossi, E. Tarentini, A. Pisciotta, D. Scelfo et C. Magnoni. « 335 Mesenchymal stem cells and acellular dermal matrices in wound healing : in vitro study of a combination treatment ». Journal of Investigative Dermatology 141, no 10 (octobre 2021) : S206. http://dx.doi.org/10.1016/j.jid.2021.08.343.
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Trinh, T. T., F. Dünschede, C. F. Vahl et B. Dorweiler. « Marine Omega3 wound matrix for the treatment of complicated wounds ». Phlebologie 45, no 02 (février 2016) : 93–98. http://dx.doi.org/10.12687/phleb2305-2-2016.
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Summary Introduction Complicated wounds in the lower extremity can arise as a consequence of insufficient soft-tissue coverage after amputations in diabetic patients. The Kerecis® Omega3 wound matrix is a decellularized skin matrix derived from codfish and represents an alternative treatment option to achieve wound healing. Methods 5 patients with diabetes mellitus and complicated wounds in the lower limb with exposed bony segments were treated with the Omega3 wound matrix between November 2014 and November 2015. Following initial debridement in the operating room, the wound matrix was applied and covered with a silicone mesh. In the further course, wound treatment was conducted on outpatient setting. Results In total, 7 wounds were treated with localization at the level of the thigh (n=2) and the forefoot (n=5). For the wounds at the thigh, it took 26 weeks to achieve wound closure, whereas the wounds at the level of the forefoot showed healing times between 13 and 41 weeks. In all patients, a reduction of analgetics intake was noted when the treatment with the Omega3 wound matrix was initiated. Conclusion The Kerecis® Omega3 wound matrix represents a viable treatment option in complicated wounds in the lower limb of diabetic patients to circumvent an otherwise necessary proximalization of amputation level. Further studies comparing the Omega3 wound matrix with appropriate control groups of standard therapies for soft-tissue conditioning/coverage like negative pressure therapy, biosurgery and other acellular dermal matrices are warranted.
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Saricilar, Erin Cihat, et Sarah Huang. « Comparison of porcine and human acellular dermal matrix outcomes in wound healing : a deep dive into the evidence ». Archives of Plastic Surgery 48, no 4 (15 juillet 2021) : 433–39. http://dx.doi.org/10.5999/aps.2020.02306.
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Acellular dermal matrices (ADM) are a novel graft. The goal of this systematic review is to evaluate the evidence behind differences in human and porcine ADM, irrelevant of manufacturing method, and to determine if there is enough of an evidence base to change clinical practice. An extensive literature search was performed through MEDLINE and Embase with search terms defining a population, intervention and outcome. Title and abstract exclusion were performed with other exclusion criteria. In 191 articles were found after exclusion of duplicates, with only 29 remaining following exclusions. Ten studies were found to have level I and II evidence (I=3, II=8), of which two were histopathological, one was an animal model, one was a systematic review, and six were clinical. The remaining studies were reviewed and considered for discussion, but did not hold high enough standards for medical evidence. Strong clinical evidence already exists for the use of human ADM, but questions of access, cost, and ethics require consideration of a xenograft. Histopathologically, evidence suggests minimal long-term differences between human and porcine ADM, although there is a short acute immune response with porcine ADM. Clinically, there is limited difference in outcomes, with a small range in effect of different ADM preparations. Considering the effectiveness of ADM in wound healing, more high-level research with appropriate statistical analysis to facilitate a future meta-analysis is recommended to justify a transition from human to porcine ADM.
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Groth, Dawid, Izabela Poplawska, Marlena Tynecka, Kamil Grubczak, Jordan Holl, Aleksandra Starosz, Adrian Janucik et al. « Abdominoplasty Skin-Based Dressing for Deep Wound Treatment—Evaluation of Different Methods of Preparation on Therapeutic Potential ». Pharmaceutics 13, no 12 (8 décembre 2021) : 2118. http://dx.doi.org/10.3390/pharmaceutics13122118.
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The management of hard-to-heal wounds is a significant clinical challenge. Acellular dermal matrices (ADMs) have been successfully introduced to enhance the healing process. Here, we aimed to develop protocol for the preparation of novel ADMs from abdominoplasty skin. We used three different decellularization protocols for skin processing, namely, 1M NaCl and sodium dodecyl sulfate (SDS, in ADM1); 2M NaCl and sodium dodecyl sulfate (SDS, in ADM1); and a combination of recombinant trypsin and Triton X-100 (in hADM 3). We assessed the effectiveness of decellularization and ADM’s structure by using histochemical and immunochemical staining. In addition, we evaluated the therapeutic potential of novel ADMs in a murine model of wound healing. Furthermore, targeted transcriptomic profiling of genes associated with wound healing was performed. First, we found that all three proposed methods of decellularization effectively removed cellular components from abdominoplasty skin. We showed, however, significant differences in the presence of class I human leukocyte antigen (HLA class I ABC), Talin 1/2, and chondroitin sulfate proteoglycan (NG2). In addition, we found that protocols, when utilized differentially, influenced the preservation of types I, III, IV, and VII collagens. Finally, we showed that abdominoplasty skin-derived ADMs might serve as an effective and safe option for deep wound treatment. More importantly, our novel dressing (ADM1) improves the kinetics of wound closure and scar maturation in the proliferative and remodeling phases of wound healing. In conclusion, we developed a protocol for abdominoplasty skin decellularization suitable for the preparation of biological dressings. We showed that different decellularization methods affect the purity, structure, and therapeutic properties of ADMs.
Thèses sur le sujet "Lyophilization, acellular dermal matrices, wound healing"
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Tognetti, Linda. « Development of new acellular lyophilized dermal matrices for advanced wound healing ». Doctoral thesis, Università di Siena, 2020. http://hdl.handle.net/11365/1116557.
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Though a great variety of dermal matrices and skin equivalents are available, either synthetic and semisynthetic, viable human skin allografts are still considered the most physiological alternative to autologous skin in hard-to-heal wounds. Wound closure after post-traumatic injuries and/or localized at peculiar body sites (head-and-neck, oral cavity, lower legs) are particularly challenging and can often be delayed due to local and systemic factors. In these cases, integrated medical-surgical approach based on the use of dermal acellular matrices should be considered. Skin bank are tissue establishments dedicated to the procurement, processing and distribution of human-derived skin bioproducts for clinical purposes. In the Skin Bank of Siena, we developed and validated 4 new different bioproducts based on cadaver skin donation, including: deep-frozen de-epidermized dermis (DED), deep-frozen reticular dermis (DER), lyophilized DED and lyophilized DER. By acting as a physiological scaffold, these products add several advantages, such as significant control of pain and exudate, protection of deep structures (e.g. tendons, bones, cartilage and nerves), stimulation of a functional new dermis (rather than a scar) and re-epithelization with relevant reduction of wound closure time.
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Nair, Rekha. « Acellular matrices derived from differentiating embryonic stem cells ». Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/37170.
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Embryonic stem cells (ESCs) can differentiate into all somatic cells, and as such, are a promising cell source for therapeutic applications. In vitro, ESCs spontaneously differentiate via the aggregation of cells into embryoid bodies (EBs), which recapitulate aspects of early embryogenesis and harbor a unique reservoir of cues critical for tissue formation and morphogenesis. Embryonic healing responses employ similar intrinsic machinery used for tissue development, and these morphogenic cues may be captured within the EB microenvironment. Recent studies have shown that when injected into injury or defect models in vivo, ESCs synthesize and secrete extracellular factors that ultimately contribute to repair, suggesting that these molecules may be as important for regenerative therapies as functional differentiation of the cells. The overall objective of this project was to develop novel acellular matrices derived from differentiating ESCs undergoing morphogenesis. The central hypothesis was that embryonic matrices contain complex mixtures of extracellular factors that, when isolated, retain bioactivity and enhance wound healing in an adult environment.
The overall objective was accomplished by: (1) investigating the production of extracellular matrix (ECM) by differentiating ESCs as a function of differentiation time; (2) assessing the ability of solvents to efficiently decellularize EBs; and (3) evaluating the healing response elicited by acellular matrices derived from EBs in a murine dermal wound healing model. Endogenous ECM synthesis by EBs varied with time and was associated with specific differentiation events. Novel techniques were developed to effectively remove cell components from EBs in order to extract complex, bioactive acellular matrices. EB-derived acellular matrices significantly enhanced the healing of excisional dermal wounds in mice, indicating the potency of extracellular factors synthesized by ESCs. All together, these studies demonstrate that acellular matrices derived from ESCs retain morphogenic factors capable of influencing tissue repair. In addition, this work lays the foundation for future studies to further examine the functional role of endogenous matrix molecules on ESC differentiation and to evaluate the utility of a stem cell-derived matrix for a variety of regenerative medicine applications.