Robert E George, Caroline C Bay, Sarah M Thornton, Jessieka T Knazze, Nicole C Kane, Kip A Ludwig, D'Andrea T Donnelly, Samuel O Poore, Aaron M Dingle
{"title":"Can Electrical Stimulation Prevent Recurrence of Keloid Scars? A Scoping Review.","authors":"Robert E George, Caroline C Bay, Sarah M Thornton, Jessieka T Knazze, Nicole C Kane, Kip A Ludwig, D'Andrea T Donnelly, Samuel O Poore, Aaron M Dingle","doi":"10.1089/wound.2023.0203","DOIUrl":"10.1089/wound.2023.0203","url":null,"abstract":"<p><p><b>Objective:</b> Keloids represent a symptomatic, aberrant healing process that is difficult to treat with high recurrence rates spanning from 55% to 100% if treated <i>via</i> excision without adjuvant therapy. Electrical stimulation (ES) has demonstrated findings that suggest it could reduce the recurrence rate of keloids after resection. Therefore, the aim of this study is to conduct a scoping review to investigate ES as an adjuvant therapy for decreasing keloid recurrence after excision. <b>Approach:</b> A scoping review was performed using PubMed and Web of Science databases. The search strategy encompassed terms linking keloids and various aspects of electrical stimulation. <b>Results:</b> Our search yielded 2,229 articles, of which 115 articles were analyzed as full text and 1 article met inclusion criteria. Despite this, ES has demonstrated other evidence that suggests its utility. ES has been shown to counter keloidic features by reducing mast cell counts, shifting wound composition from M2 to M1 macrophages, promoting angiogenesis, and controlling fibroblast orientation and location. An alternating current will orient fibroblasts perpendicular to the current without unintended migration. <b>Innovation:</b> Our study indicates that, based on a compilation of clinical and preclinical <i>in vitro</i> data, the optimal scenario for ES in the role of keloid treatment is after excision with a biphasic pulsed application and square waveform. <b>Conclusions:</b> ES could serve as a multifaceted, adjuvant treatment after keloid excision, steering the healing process away from keloid-associated characteristics. Its cost-effectiveness means it could be adopted globally, providing a strategy to mitigate the burden of keloids irrespective of other available treatments or economic conditions.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141417209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Role of Hydrogel Biomaterials in the Intervention of Wound Healing and Skin Regeneration via Exosomes: A Systematic Review and Meta-Analysis of Preclinical Animal Studies.","authors":"Yujia Yang, Jinlei Cui, Yajie Kong, Yu Hou, Haixia Zhang, Cuiqing Ma","doi":"10.1089/wound.2024.0058","DOIUrl":"10.1089/wound.2024.0058","url":null,"abstract":"<p><p><b>Significance:</b> The combination of hydrogel biomaterials with exosomes to facilitate wound healing and skin regeneration is a promising approach. <b>Recent Advances:</b> Recent preclinical animal studies have focused on investigating the efficacy of hydrogel-based delivery systems for exosomes in promoting wound healing and skin regeneration. <b>Critical Issues:</b> Despite encouraging results, critical issues remain unresolved, such as optimizing hydrogel properties to enhance the efficacy of combined therapy with exosomes for wound and bridging the translational gap between preclinical and clinical applications. <b>Future Directions:</b> Future research endeavors should concentrate on refining hydrogel design to enhance exosome delivery efficacy, conducting rigorous clinical trials to assess the safety and efficacy of exosome-loaded hydrogels in human wound healing and skin regeneration, and exploring innovative strategies to maximize therapeutic outcomes.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141316460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surendrasingh Y Sonaye, Smriti Bohara, Breanne L Welsh, Elif G Ertugral, Chandrasekhar R Kothapalli, Hanz Richter, Koyal Garg, Prabaha Sikder
{"title":"Extrusion-Based 3D Bioprinting of Bioactive and Piezoelectric Scaffolds as Potential Therapy for Treating Critical Soft Tissue Wounds.","authors":"Surendrasingh Y Sonaye, Smriti Bohara, Breanne L Welsh, Elif G Ertugral, Chandrasekhar R Kothapalli, Hanz Richter, Koyal Garg, Prabaha Sikder","doi":"10.1089/wound.2024.0073","DOIUrl":"10.1089/wound.2024.0073","url":null,"abstract":"<p><p><b>Objective:</b> This study focuses on developing bioactive piezoelectric scaffolds that could deliver bioelectrical cues to potentially treat injuries to soft tissues such as skeletal muscles and promote active regeneration. <b>Approach:</b> To address the underexplored aspect of bioelectrical cues in skeletal muscle tissue engineering (SMTE), we developed piezoelectric bioink based on natural bioactive materials such as sodium alginate, gelatin, and chitosan. Extrusion-based 3D bioprinting was utilized to develop scaffolds that mimic muscle stiffness and generate electrical stimulation (E-stim) when subjected to forces. The biocompatibility of these scaffolds was tested with the C2C12 muscle cell line. <b>Results:</b> The bioink demonstrated suitable rheological properties for 3D bioprinting, resulting in high-resolution composite sodium alginate-gelatin-chitosan scaffolds with good structural fidelity. The scaffolds exhibited a 42-60 kPa stiffness, similar to muscle. When a controlled force of 5N was applied to the scaffolds at a constant frequency of 4 Hz, they generated electrical fields and impulses (charge), indicating their suitability as a stand-alone scaffold to generate E-stim and instill bioelectrical cues in the wound region. The cell viability and proliferation test results confirm the scaffold's biocompatibility with C2C12s and the benefit of piezoelectricity in promoting muscle cell growth kinetics. Our study indicates that our piezoelectric bioink and scaffolds offer promise as autonomous E-stim-generating regenerative therapy for SMTE. <b>Innovation:</b> A novel approach for treating skeletal muscle wounds was introduced by developing a bioactive electroactive scaffold capable of autonomously generating E-stim without stimulators and electrodes. This scaffold offers a unique approach to enhancing skeletal muscle regeneration through bioelectric cues, addressing a major gap in the SMTE, that is, fibrotic tissue formation due to delayed muscle regeneration. <b>Conclusion:</b> A piezoelectric scaffold was developed, providing a promising solution for promoting skeletal muscle regeneration. This development can potentially address skeletal muscle injuries and offers a unique approach to facilitating skeletal muscle wound healing.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141603146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James T Redden, Jingyao Deng, David J Cohen, Zvi Schwartz, Michael J McClure
{"title":"Muscle Fibrosis, NF-κB, and TGF-β Are Differentially Altered in Two Models of Paralysis (Botox Versus Neurectomy).","authors":"James T Redden, Jingyao Deng, David J Cohen, Zvi Schwartz, Michael J McClure","doi":"10.1089/wound.2024.0045","DOIUrl":"10.1089/wound.2024.0045","url":null,"abstract":"<p><p><b>Objective</b>: Volumetric muscle loss results in intramuscular axotomy, denervating muscle distal to the injury and leading to paralysis, denervation, and loss of muscle function. Once the nerve is damaged, paralyzed skeletal muscle will atrophy and accumulate noncontractile connective tissue. The objective of this study was to determine differences in connective tissue, atrophy, and inflammatory signaling between two paralysis models, botulinum toxin (Botox), which blocks acetylcholine transmission while keeping nerves intact, and neurectomy, which eliminates all nerve-to-muscle signaling. <b>Approach</b>: Twenty male Sprague Dawley rats were randomized and received a sciatic-femoral neurectomy (SFN), Botox-induced muscle paralysis of the proximal femur muscles, quadriceps femoris, hamstrings, and calf muscles (BTX), or sham. Muscle force was measured 52 days postsurgery, and samples were collected for histology, protein, and mRNA assays. <b>Results:</b> SFN and BTX decreased twitch and tetanic force, decreased fiber size by twofold, and increased myogenic expression compared with controls. SFN increased the levels of all major extracellular matrix proteins correlating with fibrosis [<i>e.g.,</i> laminin, fibronectin, and collagen type(s) I, III, VI]. SFN also increased profibrotic and proinflammatory mRNA compared with BTX and controls. <b>Innovation</b>: SFN and BTX were similar in gross morphology and functional deficiencies. However, SFN exhibited a higher amount of fibrosis in histological sections and immunoblotting. The present study shows evidence that nerve signaling changes NF-κB and TGF-β signaling, warranting future studies to determine the mechanisms involved. <b>Conclusion:</b> These data indicate that nerve signaling may influence fibrogenesis following denervation, but the mechanisms involved may differ as a function of the method of paralysis.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141320426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan Zhang, Shiwen Huang, Yifei Cao, Li Li, Jun Yang, Min Zhao
{"title":"New Opportunities for Electric Fields in Promoting Wound Healing: Collective Electrotaxis.","authors":"Yan Zhang, Shiwen Huang, Yifei Cao, Li Li, Jun Yang, Min Zhao","doi":"10.1089/wound.2024.0003","DOIUrl":"10.1089/wound.2024.0003","url":null,"abstract":"<p><p><b>Significance:</b> It has long been hypothesized that naturally occurring electric fields (EFs) aid wound healing by guiding cell migration. Consequently, the application of EFs has significant potential for promoting wound healing. However, the mechanisms underlying the cellular response to EFs remain unclear. <b>Recent Advances:</b> Although the directed migration of isolated single cells under EFs has been studied for decades, only recently has experimental evidence demonstrated the distinct collective migration of large sheets of keratinocytes and corneal epithelial cells in response to applied EFs. Accumulating evidence suggests that the emergent properties of cell groups in response to EF guidance offer new opportunities for EF-assisted directional migration. <b>Critical Issues:</b> In this review, we provide an overview of the field of collective electrotaxis, highlighting key advances made in recent years. We also discuss advanced engineering strategies utilized to manipulate collective electrotaxis. <b>Future Directions:</b> We outline a series of unanswered questions in this field and propose potential applications of collective electrotaxis in developing electrical stimulation technologies for wound healing.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141080314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Prospective Evaluation of Vitamin C, Vitamin D, and Zinc Deficiencies in Patients with Active Foot Ulceration.","authors":"Nada Bechara, Peta Tehan, Jenny E Gunton","doi":"10.1089/wound.2024.0063","DOIUrl":"10.1089/wound.2024.0063","url":null,"abstract":"<p><p><b>Objective:</b> This prospective cohort study aimed to determine the relationship between serum vitamin C, D, and zinc on foot wound healing and compare time to healing in individuals who are deficient versus those who have adequate levels. <b>Approach:</b> One hundred adults with foot wounds were recruited from Blacktown high-risk foot service with a follow-up period of 12 months. Serum vitamin C, D, and zinc as well as routine baseline blood testing was undertaken. Wounds were measured using a three-dimensional wound camera and classified using the Wound Ischemia and Foot Infection system at regular intervals. <b>Results:</b> Vitamin C deficiency was present in 75% of participants, 50% had vitamin D deficiency, and 38% had zinc deficiency. Diabetes was present in 91% of participants, and 50% had a history of previous amputation. Wound chronicity (<i>p</i> = 0.03) and toe pressures (<i>p</i> = 0.04) were predictive of wound healing. Serum vitamin C, D, and zinc were not associated with significant differences in wound healing or time to wound healing. <b>Innovation:</b> Deficiencies in vitamin C, D, and zinc were highly prevalent in participants with active foot ulceration. Wound chronicity was predictive of healing outcomes, highlighting the importance of rapid access to best practice care. <b>Conclusion:</b> This cohort had high deficiency rates of vitamin C, D, and zinc consistent with previous literature; however, there was no relationship between these deficiencies and wound healing or time to heal. Large randomized controlled trials are required to comprehensively determine if adequate levels of these nutrients improve wound healing outcomes.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141465473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparison of \"Semiocclusive Dressing\" Treatment Using Plastic Wrap or Low-Adherent Absorbent Wound Dressings Versus Occlusive Dressing Treatment for Stage III/IV Pressure Injuries in the Inflammatory Phase: A Randomized Controlled Trial.","authors":"Jun Takahashi, Kayoko Nakae, Osamu Yokota, Rena Nakata, Hayato Hasegawa, Masaharu Miyagawa","doi":"10.1089/wound.2024.0041","DOIUrl":"10.1089/wound.2024.0041","url":null,"abstract":"<p><p><b>Objective:</b> To compare the effectiveness of \"semiocclusive dressing (SOD)\" treatment using plastic wrap or low-adherent absorbent wound dressings with that of occlusive dressing (OD) treatment for National Pressure Injury Advisory Panel stage III/IV pressure injuries in the inflammatory phase. <b>Approach:</b> This 12-week, open-label, randomized controlled trial was conducted at one hospital and three care facilities. Seventy-seven participants were enrolled; 40 comprised the SOD group and 37 comprised the OD group. The primary outcome was the surface area reduction. Secondary outcomes included the Bates-Jensen Wound Assessment Tool (BWAT) score reductions, incidence of adverse events, and material cost. This trial met the recommendations of the CONSORT 2010 statement. <b>Results:</b> The surface area reduction of the SOD group was greater than that of the OD group throughout the study period. The significant interaction was revealed between treatment and time course (<i>p</i> < 0.0001). The 95% confidence interval of the difference at 12 weeks was 3.4 to 21.9. The median BWAT score reduction of the SOD group at 12 weeks was 23, and that of the OD group was 18.5 (<i>p</i> = 0.0077). The incidence of adverse events was comparable between groups. The OD treatment cost was 3.0 times higher than the SOD treatment cost (<i>p</i> = 0.0012). <b>Innovation:</b> Because the SOD does not completely occlude the wound, excess exudate drains from the wound. Therefore, SOD can treat the wound with abundant exudate effectively and safely. <b>Conclusion:</b> SOD treatment is more effective and less expensive than OD treatment for stage III/IV pressure injuries. <b>Clinical Trial Registration:</b> UMIN Clinical Trials Registry [UMIN000023412]. Registered on July 31, 2016.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141316459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Charlene W Cai, Josh A Grey, Dirk Hubmacher, Woojin M Han
{"title":"Biomaterial-Based Regenerative Strategies for Volumetric Muscle Loss: Challenges and Solutions.","authors":"Charlene W Cai, Josh A Grey, Dirk Hubmacher, Woojin M Han","doi":"10.1089/wound.2024.0079","DOIUrl":"10.1089/wound.2024.0079","url":null,"abstract":"<p><p><b>Significance:</b> Volumetric muscle loss (VML) is caused by the loss of significant amounts of skeletal muscle tissue. VML cannot be repaired by intrinsic regenerative processes, resulting in permanent loss of muscle function and disability. Current rehabilitative-focused treatment strategies lack efficacy and do not restore muscle function, indicating the need for the development of effective regenerative strategies. <b>Recent Advances:</b> Recent developments implicate biomaterial-based approaches for promoting muscle repair and functional restoration post-VML. Specifically, bioscaffolds transplanted in the injury site have been utilized to mimic endogenous cues of the ablated tissue to promote myogenic pathways, increase neo-myofiber synthesis, and ultimately restore contractile function to the injured unit. <b>Critical Issues:</b> Despite the development and preclinical testing of various biomaterial-based regenerative strategies, effective therapies for patients are not available. The unique challenges posed for biomaterial-based treatments of VML injuries, including its scalability and clinical applicability beyond small-animal models, impede progress. Furthermore, production of tissue-engineered constructs is technically demanding, with reproducibility issues at scale and complexities in achieving vascularization and innervation of large constructs. <b>Future Directions:</b> Biomaterial-based regenerative strategies designed to comprehensively address the pathophysiology of VML are needed. Considerations for clinical translation, including scalability and regulatory compliance, should also be considered when developing such strategies. In addition, an integrated approach that combines regenerative and rehabilitative strategies is essential for ensuring functional improvement.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141074901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wolfram Demmer, Jannik Schinacher, Paul Severin Wiggenhauser, Riccardo E Giunta
{"title":"Use of Acellular Matrices as Scaffolds in Cartilage Regeneration: A Systematic Review.","authors":"Wolfram Demmer, Jannik Schinacher, Paul Severin Wiggenhauser, Riccardo E Giunta","doi":"10.1089/wound.2024.0065","DOIUrl":"10.1089/wound.2024.0065","url":null,"abstract":"<p><p><b>Significance:</b> Cartilage regeneration remains a significant challenge in the field of regenerative medicine. Acellular matrix (AM)-based cartilage tissue regeneration offers an innovative approach to repairing cartilage defects by providing a scaffold for new tissue growth. Its significance lies in its potential to restore joint function, mitigate pain, and improve the quality of life for patients suffering from cartilage-related injuries and conditions. <b>Recent Advances:</b> Recent advances in AM-based cartilage regeneration have focused on enhancing scaffold properties for improved cell adhesion, proliferation, and differentiation. Moreover, several scaffold techniques such as combining acellular dermal matrix (ADM) and acellular cartilage matrix (ACM) with cartilage tissue, as well as biphasic scaffolding, enjoy rising research activity. Incorporating bioactive factors and advanced manufacturing techniques holds promise for producing more biomimetic scaffolds, advancing efficient cartilage repair and regeneration. <b>Critical Issues:</b> Obstacles in AM-based cartilage regeneration include achieving proper integration with the surrounding tissue and ensuring long-term durability of the regenerated cartilage. Furthermore, issues such as high costs and limited availability of suitable cells for scaffold seeding must be considered. The heterogeneity and limited regenerative capabilities of cartilage need to be addressed for successful clinical translation. <b>Future Directions:</b> Research should focus on exploring advanced biomaterials and developing new techniques, regarding easily reproducible scaffolds, ideally constructed from clinically validated and readily available commercial products. Findings underline the potential of AM-based approaches, especially the rising exploration of tissue-derived ADM and ACM. In future, the primary objective should not only be the regeneration of small cartilage defects but rather focus on fully regenerating a joint or larger cartilage defect.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141074925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Charlotte R Reed, Tokoya Williams, Iulianna Taritsa, Kevin Wu, Evangelia Chnari, Madeline J O'Connor, Bradley A Melnick, Kelly C Ho, Marc Long, Kristin N Huffman, Robert D Galiano
{"title":"Exploring the Efficacy of Selected Allografts in Chronic Wound Healing: Evidence from Murine Models and Clinical Data for a Proposed Treatment Algorithm.","authors":"Charlotte R Reed, Tokoya Williams, Iulianna Taritsa, Kevin Wu, Evangelia Chnari, Madeline J O'Connor, Bradley A Melnick, Kelly C Ho, Marc Long, Kristin N Huffman, Robert D Galiano","doi":"10.1089/wound.2023.0139","DOIUrl":"10.1089/wound.2023.0139","url":null,"abstract":"<p><p><b>Significance:</b> Chronic wounds can lead to poor outcomes for patients, with risks, including amputation and death. In the United States, chronic wounds affect 2.5% of the population and cost up to $28 billion per year in primary health care costs. <b>Recent Advances:</b> Allograft tissues (dermal, amnion, and amnion/chorion) have shown efficacy in improving healing of chronic, recalcitrant wounds in human patients, as evidenced by multiple clinical trials. Their mechanisms of actions have been relatively understudied, until recently. Research in murine models has shown that dermal allografts promote reepithelialization, amnion allografts promote granulation tissue formation and angiogenesis, and amnion/chorion allografts support all stages of wound healing. These findings confirm their effectiveness and illuminate their therapeutic mechanisms. <b>Critical Issues:</b> Despite the promise of allografts in chronic wound care, a gap exists in understanding which allografts are most effective during each wound healing stage. The variable efficacy among each type of allograft suggests a mechanistic approach toward a proposed clinical treatment algorithm, based on wound characteristics and patient's needs, may be beneficial. <b>Future Directions:</b> Recent advances in allografts provide a framework for further investigations into patient-specific allograft selection. This requires additional research to identify which allografts support the best outcomes during each stage of wound healing and in which wound types. Longitudinal human studies investigating the long-term impacts of allografts, particularly in the remodeling phase, are also essential to developing a deeper understanding of their role in sustained wound repair and recovery.</p>","PeriodicalId":7413,"journal":{"name":"Advances in wound care","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140955715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}