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Wound Repair and Regeneration

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https://www.readbyqxmd.com/read/28544322/in-vitro-skin-expansion-wound-healing-assessment
#1
Peter M Prim, Han Su Kim, Lindsey E Shapiro, Jae Sung Lee, James H Kaan, John D Jackson, James J Yoo, Anthony Atala, Sang Jin Lee
For treatments requiring split-thickness skin grafts, it is preferable to mesh the grafts. This reduces the amount of excised skin and covers more wound area. The mesh technique, however, destroys surface continuity, which results in scarring. Strain-based bioreactors, on the other hand, have successfully expanded split-thickness skin grafts in vitro within a 7-day period, increasing graft coverage. After in vitro expansion, the expanded skin grafts were tested in a porcine full-thickness excisional wound model...
May 24, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28544150/a-randomized-clinical-trial-of-a-human-acellular-dermal-matrix-demonstrated-superior-healing-rates-for-chronic-diabetic-foot-ulcers-over-conventional-care-and-an-active-acellular-dermal-matrix-comparator
#2
Shawn Cazzell, Dean Vayser, Hau Pham, Jodi Walters, Alexander Reyzelman, Brian Samsell, Kimberly Dorsch, Mark Moore
This study compared the efficacy and safety of a human acellular dermal matrix (ADM), D-ADM, with a conventional care arm and an active comparator human ADM arm, GJ-ADM, for the treatment of chronic diabetic foot ulcers. The study design was a prospective, randomized controlled trial that enrolled 168 diabetic foot ulcer subjects in 13 centers across 9 states. Subjects in the ADM arms received one application but could receive one additional application of ADM if deemed necessary. Screen failures and early withdrawals left 53 subjects in the D-ADM arm, 56 in the conventional care arm, and 23 in the GJ-ADM arm (2:2:1 ratio)...
May 24, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28520212/models-for-cutaneous-wound-healing
#3
LETTER
Bouke Boekema, Magda M W Ulrich, Esther Middelkoop
No abstract text is available yet for this article.
May 18, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28513105/hair-follicle-specific-acvr1-alk2-critically-affects-skin-morphogenesis-and-attenuates-wound-healing
#4
Michael Sorkin, Shailesh Agarwal, Kavitha Ranganathan, Shawn Loder, David Cholok, David Fireman, John Li, Shuli Li, Bin Zhao, Yuji Mishina, Paul Cederna, Benjamin Levi
The bone morphogenic protein signaling (BMP) is intricately involved in the quiescence and regulation of stem cells through activation of BMP receptors. Hair follicle stem cells play a critical role in cutaneous homeostasis and regeneration. Here, we utilize a novel mouse model with targeted overexpression of the BMP receptor ALK2/ACVR1 in hair follicle stem cells, to characterize its role in skin development and postnatal wound healing. Initial histologic evaluation demonstrated significant dysregulation in hair follicle morphogenesis in mutant mice...
May 17, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28494521/topical-1-propranolol-cream-promotes-cutaneous-wound-healing-in-spontaneously-diabetic-mice
#5
Zhifang Zheng, Yishu Liu, Yu Yang, Jianbing Tang, Biao Cheng
Diabetic foot ulcers (DFUs) are a constant threat to diabetic patients and can lead to amputations and even death. Intralesional administration of propranolol in diabetic wounds has not been reported previously. This study aimed to investigate the efficacy of propranolol cream in diabetic wounds. Fifty-six spontaneously diabetic mice were divided into the propranolol group and the control group. After preparing full-thickness wounds on the back of the mice, 1% propranolol cream was topically applied to wounds in the experimental group and 0% propranolol cream in controls...
May 11, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28494512/gene-expression-profiling-of-skeletal-muscle-after-volumetric-muscle-loss
#6
Kristo Nuutila, Dharaniya Sakthivel, Carla Kruse, Peter Tran, Giorgio Giatsidis, Indranil Sinha
Volumetric muscle loss (VML), usually occurring following traumatic injury, results in a composite loss of muscle mass. These injuries manifest as decreased strength and functional impairments. Clinically, these injuries often heal with fibrosis, as opposed to skeletal muscle regeneration. The present study examines the healing patterns of a skeletal muscle following VML in a murine model. Eight-week old male C57BL/6J mice used in the study underwent either bilateral VML injury or cryoinjury, a widely-used model known to induce skeletal muscle regeneration...
May 11, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28494507/subepidermal-moisture-detection-of-pressure-induced-tissue-damage-on-the-trunk-the-pressure-ulcer-detection-pud-study-outcomes
#7
Barbara M Bates-Jensen, Heather E McCreath, Anabel Patlan
We examined the relationship between subepidermal moisture measured using surface electrical capacitance and visual skin assessment of pressure ulcers at the trunk location (sacral, ischial tuberosities) in 417 nursing home residents residing in 19 facilities. Participants were on average older (mean age of 77 years), 58% were female, over half were ethnic minorities (29% African American, 12% Asian American, and 21% Hispanic), and at risk for pressure ulcers (mean score for Braden Scale for Predicting Pressure Ulcer Risk of 15...
May 11, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28493324/level-specific-amputations-and-resulting-regenerative-outcomes-in-the-mouse-distal-phalanx
#8
Connie S Chamberlain, Justin J Jeffery, Ellen M Leiferman, Tugrul Yildirim, Xin Sun, Geoffrey S Baer, William L Murphy, Ray Vanderby
No abstract text is available yet for this article.
May 10, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28466497/histopathological-comparisons-of-staphylococcus-aureus-and-pseudomonas-aeruginosa-experimental-infected-porcine-burn-wounds
#9
Sarah B Chaney, Kasturi Ganesh, Shomita Mathew-Steiner, Paul Stromberg, Sashwati Roy, Chandan K Sen, Daniel J Wozniak
Chronic skin wounds are a significant human health concern and are often complicated by infection with Pseudomonas aeruginosa and Staphylococcus aureus, particularly methicillin resistant S. aureus (MRSA). Translating the knowledge gained from extensive study of virulence mechanisms and pathogenesis of these bacterial species to new treatment modalities has been lacking in part due to a paucity of animal models able to recapitulate human disease. Our groups recently described a novel porcine chronic burn wound model for the study of bacterial infection; however, the histopathology of infection has yet to be described...
May 2, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28466489/characterization-of-mycobacterium-marinum-infections-in-zebrafish-wounds-and-sinus-tracts
#10
Ling Chen, Zhen Liu, Yingjun Su, Di Wang, Bin Yin, Bin Shu, Jishen Zhang, Xiaoyan Zhu, Chiyu Jia
The impaired healing of Mycobacterium tuberculosis-infected wounds is a clinical challenge, and the mechanisms involved are still not clear. The zebrafish model of Mycobacterium marinum infection has provided surprising insights into the pathogenesis of tuberculosis in humans. Similarly, the major principles and phases of cutaneous wound healing are conserved among adult mammals and adult zebrafish. Here, we injected Mycobacterium marinum into the dorsal muscles of adult zebrafish and observed the development of chronic wound pathology...
May 2, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28464475/isolation-of-cd248-expressing-stromal-vascular-fraction-for-targeted-improvement-of-wound-healing
#11
Elizabeth Brett, Elizabeth R Zielins, Monica Chin, Michael Januszyk, Charles P Blackshear, Michael Findlay, Arash Momeni, Geoffrey C Gurtner, Michael T Longaker, Derrick C Wan
Wound healing remains a global issue of disability, cost, and health. Addition of cells from the stromal vascular fraction (SVF) of adipose tissue has been shown to increase the rate of full thickness wound closure. This study aimed to investigate the angiogenic mechanisms of CD248+ SVF cells in the context of full thickness excisional wounds. Single cell transcriptional analysis was used to identify and cluster angiogenic gene-expressing cells, which was then correlated with surface marker expression. SVF cells isolated from human lipoaspirate were FACS sorted based on the presence of CD248...
May 2, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28463433/report-on-the-1-st-european-tissue-repair-society-summer-school-london-29-th-june-1-st-july-2016
#12
LETTER
Chrysovalantou Faniku, Irene Castellano-Pellicena, Tamara Hoppenbrouwers, H Ibrahim Korkmaz
No abstract text is available yet for this article.
April 30, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28437853/inhibition-of-tgf-%C3%AE-signaling-promotes-expansion-of-human-epidermal-keratinocytes-in-feeder-cell-co-culture
#13
Daisuke Suzuki, Filipa Pinto, Makoto Senoo
Cultured epidermal autografts have been used worldwide since 1981 for patients with extensive third-degree burn wounds and limited skin donor sites. Despite significant progress in techniques toward improving clinical outcome of skin grafts, the long in vitro preparation time of cultured autografts has remained a major factor limiting its widespread use. Here, we show that pharmacological inhibition of TGF-β signaling promotes the expansion of human epidermal keratinocytes (HEKs) with high proliferative potential in co-cultures with both murine 3T3-J2 cells and human feeder cells, including dermal fibroblasts and preadipocytes...
April 24, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28437036/from-bed-to-bench-7th-joint-meeting-of-european-tissue-repair-society-etrs-with-the-wound-healing-society-whs-and-the-25th-annual-meeting-of-etrs-in-copenhagen-denmark
#14
LETTER
Magnus S Ågren, Patricia L Danielsen, Finn Gottrup, Dimitris Kletsas, Sabine A Eming, Susan Volk, Lisa Gould
No abstract text is available yet for this article.
April 24, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28419727/endotoxin-testing-of-a-wound-debridement-device-containing-medicinal-lucilia-sericata-larvae
#15
Samantha Pickles, David Pritchard
Alimentary products of medicinal Lucilia sericata larvae are studied to determine their mechanisms of action, particularly in the contexts of wound debridement and disinfection. Furthermore, the larvae can be applied to patients in contained medical devices (such as the BioBag; BioMonde). Here, we tested the materials and larval content of the most commonly used debridement device (the "BB-50") to explore the possibility that endotoxins may be contributing to the bio-activity of the product, given that endotoxins are potent stimulants of cellular activation...
April 17, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28419657/a-new-approach-to-clinical-research-integrating-clinical-care-quality-reporting-and-research-using-a-wound-care-network-based-learning-healthcare-system
#16
Thomas E Serena, Caroline E Fife, Kristen A Eckert, Raphael A Yaakov, Marissa J Carter
The disparity between ideal evidence from randomized controlled trials and real-world evidence in medical research has prompted the United States Food and Drug Administration to consider the use of real-world data to better understand safety and effectiveness of new devices for a broader patient population and to prioritize real-world data in regulatory decision making. As the healthcare system transitions from volume- to value-based care, there is a growing need to harness the power of real-world data to change the paradigm for wound care clinical research and enable more generalizable clinical trials...
April 17, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28395131/the-effects-of-zinc-supplementation-on-wound-healing-and-metabolic-status-in-patients-with-diabetic-foot-ulcer-a-randomized-double-blind-placebo-controlled-trial
#17
Mansooreh Momen-Heravi, Elham Barahimi, Reza Razzaghi, Fereshteh Bahmani, Hamid Reza Gilasi, Zatollah Asemi
This study was performed to determine the effects of zinc supplementation on wound healing and metabolic status in patients with diabetic foot ulcer. The current randomized, double-blind, placebo-controlled trial was conducted among 60 patients (aged 40-85 years old) with grade 3 diabetic foot ulcer. Participants were randomly divided into two groups (30 participants in each group) to take either 220 mg zinc sulfate supplements containing 50 mg elemental zinc or placebo daily for 12 weeks. After the 12-week intervention, compared with the placebo, zinc supplementation was associated with significant reductions in ulcer length (-1...
April 10, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28380670/improved-regeneration-and-de-novo-bone-formation-in-a-diabetic-zebrafish-model-treated-with-paricalcitol-and-cinacalcet
#18
Filipe R Carvalho, Ana R Fernandes, M Leonor Cancela, Paulo J Gavaia
Bone changes related to diabetes have been well stablished, but few strategies have been developed to prevent this growing health problem. In our work, we propose to investigate the effects of calcitriol as well as of a vitamin D analog (paricalcitol) and a calcimimetic (cinacalcet), in fin regeneration and de novo mineralization in a zebrafish model of diabetes. Following exposure of diabetic transgenic Tg(ins:nfsb-mCherry) zebrafish to calcitriol, paricalcitol and cinacalcet, caudal fins were amputated to assess their effects on tissue regeneration...
April 5, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28371122/impaired-collagen-synthesis-in-the-rectum-may-be-a-molecular-target-in-anastomotic-leakage-prophylaxis
#19
Anastasia S Buch, Peter Schjerling, Marie Kjaer, Lars Nannestad Jorgensen, Peter-Martin Krarup, Magnus S Ågren
The underlying molecular mechanisms for anastomotic leakage (AL) after colorectal surgery are unknown and there are no therapeutics for AL prevention. Our aim was to correlate endogenous matrix metalloproteinase (MMP) activity, collagen concentration, and collagen/MMP/cytokine mRNA levels with anatomic location in human colorectal tissue. We enrolled 22 patients in this prospective study: 7 underwent elective laparoscopic sigmoid resection and 15 underwent low anterior resection for colorectal cancer. Full-thickness intestinal tissue rings from anastomoses constructed with a circular stapler were used for the determination of the MMP activity, tissue collagen concentration and mRNA levels...
April 3, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28370945/alternatively-activated-macrophages-derived-from-thp-1-cells-promote-the-fibrogenic-activities-of-human-dermal-fibroblasts
#20
Zhensen Zhu, Jie Ding, Zengshuan Ma, Takashi Iwashina, Edward E Tredget
Macrophages play a key role in the wound healing process and can be divided into classically activated macrophages (M1) and alternatively activated macrophages (M2). Fibroblasts maintain the physical integrity of connective tissue, participate in wound closure as well as produce and remodel extracellular matrix. Macrophages have a close relationship with fibroblasts by increasing the production of matrix metalloproteinase-1 (MMP-1) for faster wound closure and remodeling and myofibroblast differentiation from fibroblasts...
April 3, 2017: Wound Repair and Regeneration
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