SciCombinator

Discover the most talked about and latest scientific content & concepts.

Concept: Healing

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The present work reports the purification and partial characterization of an antibacterial lectin (EmaL) obtained from Eugenia malaccensis seeds as well as the evaluation of its effect in the daily topical treatment of repairing process of cutaneous wounds in mice.

Concepts: Present, Wound healing, Healing, Eugenia

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To map skin temperature kinetics, and by extension skin blood flow throughout normal or abnormal repair of full-thickness cutaneous wounds created on the horse body and limb, using infrared thermography.

Concepts: Scar, Wound healing, Healing, Temperature, Horse, Black body, Thermography, Thermal radiation

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The present study was designed to determine the role of topical treatment with curcumin (Cur) on burn wound healing in rats. The Wistar-albino rats were randomly allotted into one of three experimental groups: 4th, 8th and 12th day (post burn) and all groups include subgroups which Burn and Burn + Cur. Each group contains 12 animals. Burn wounds were made on the back of rat and Cur was administered topically. At the end of the study, all animals were sacrificed and the wound tissues removed for analyse to biochemical and histopathological changes. There was a significant increase in the hydroxyproline levels in the skin of the Cur groups. Cur treated wounds were found to heal much faster as indicated by improved rates of inflammatory cells, collagen deposition, angiogenesis, granulation tissue formation and epithelialization which were also confirmed by histopathological and biochemical examinations. Our data also indicate that there is a rise in the expression of proliferating cell nuclear antigen in skin tissues of Cur-treated rats in the Burn group. The results clearly substantiate the beneficial effects of the topical application of Cur in the acceleration of wound healing.

Concepts: Scar, Wound healing, Collagen, Extracellular matrix, Healing, Medical emergencies, Injuries, Granulation tissue

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Idiopathic avascular necrosis (AVN) of bone causes significant morbidity in adults although the pathophysiology is unknown. The present treatment options include systemic biphosphonate therapy and local bone drilling decompression, ameliorating the healing process and their by render the weight bearing femur head less vulnerable to collapse. In the present study we demonstrate the involvement of heparanase in AVN and in the acceptable treatments.

Concepts: Inflammation, Present, Healing, Heart, Femur, Avascular necrosis, 2006 albums, Femur head

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Mammalian fetal skin regenerates perfectly, but adult skin repairs by the formation of scar tissue. The cause of this imperfect repair by adult skin is not understood. In contrast, wounded adult amphibian (urodeles and anurans) skin is like mammalian fetal skin in that it repairs by regeneration, not scarring. Scar-free wound repair in adult Xenopus is associated with expression of the paired homeobox transcription factor Prx1 by mesenchymal cells of the wound, a feature shared by mesenchymal cells of the regeneration blastema of the axolotl limb. Furthermore, mesenchymal cells of Xenopus skin wounds that harbor the mouse Prx1-limb-enhancer as a transgene exhibit activation of the enhancer despite the fact that they are Xenopus cells, suggesting that the mouse Prx1 enhancer possesses all elements required for its activation in skin wound healing, even though activation of the same enhancer in the mouse is not seen in the wounded skin of an adult mouse. Elucidation of the role of the Prx1 gene in amphibian skin wound healing will help to clarify the molecular mechanisms of scarless wound healing. Shifting the molecular mechanism of wound repair in mammals to that of amphibians, including reactivation of the Prx1-limb-enhancer, will be an important clue to stimulate scarless wound repair in mammalian adult skin. Finding or creating Prx1-positive stem cells in adult mammal skin by activating the Prx1-limb-enhancer may be a fast and reliable way to provide for scarless skin wound repair, and even directly lead to limb regeneration in mammals.

Concepts: Gene, Scar, Wound healing, Healing, Developmental biology, Skin, Wound, Salamander

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The purpose of this study is to evaluate the efficacy of negative pressure wound therapy (NPWT) as compared to standard of care on wound healing in high-risk patients with multiple significant co-morbidities and chronic lower extremity ulcers (LEUs) across a continuum of care settings. A retrospective cohort study of ‘real world’ high-risk patients was conducted using Boston University Medical Center electronic medical records, along with chart abstraction to capture detailed medical history, co-morbidities, healing outcomes and ulcer characteristics. A total of 342 patients, 171 NPWT patients with LEUs were matched with 171 non NPWT patients by age and gender, are included in this cohort from 2002 to 2010. The hazard ratios (HRs) were estimated in COX proportional hazard models after adjusted for potential confounders. NPWT patients were 2·63 times (95% CI = 1·87-3·70) more likely to achieve wound closure compared to non NPWT patients. Moreover, incidence of wound closure in NPWT patients were increased in diabetic ulcers (HR = 3·26, 95% CI = 2·21-4·83), arterial ulcers (HR = 2·27, CI = 1·56-3·78) and venous ulcers (HR = 6·31, 95% CI = 1·49-26·6) compared to non NPWT patients. Additionally, wound healing appears to be positively affected by timing of NPWT application. Compared to later NPWT users (1 year or later after ulcer onset), early NPWT users (within 3 months after ulcer onset) and intermediate NPWT users (4-12 months after ulcer onset) were 3·38 and 2·18 times more likely to achieve wound healing, respectively. Our study showed that despite the greater significant co-morbidities, patients with NPWT treatment healed faster. Early use of NPWT demonstrated better healing. The longer the interval before intervention is with NPWT, the higher the correlation is with poor outcome.

Concepts: Cohort study, Proportional hazards models, Scar, Wound healing, Healing, Chronic wound, Diabetic foot, Negative pressure wound therapy

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Birch bark has a long lasting history as a traditional medicinal remedy to accelerate wound healing. Recently, the efficacy of birch bark preparations has also been proven clinically. As active principle pentacyclic triterpenes are generally accepted. Here, we report a comprehensive study on the underlying molecular mechanisms of the wound healing properties of a well-defined birch bark preparation named as TE (triterpene extract) as well as the isolated single triterpenes in human primary keratinocytes and porcine ex-vivo wound healing models.

Concepts: Pharmacology, Scar, Wound healing, Healing, Pharmaceutical drug, Birch bark

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The healing of grafted areas after surgical treatment of deep burns frequently generates mutilating scars, and rises the risk of subsequent scar hypertrophy. Scar assessment based on clinical evaluation is inherently subjective, which stimulates search for objective means of evaluation.

Concepts: Scar, Wound healing, Collagen, Healing, Evaluation, Acne vulgaris, FN SCAR

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While the importance of oxygen to the wound healing process is well accepted, research and technological advances continue in this field and efforts are ongoing to further utilize oxygen as a therapeutic modality. In this paper, the authors briefly review the role of oxygen in wound healing and discuss the distinct mechanism of action as well as the advantages and disadvantages of the three major oxygen-based therapies currently in clinical use (Hyperbaric Oxygen and Topical Oxygen and Continuous Diffusion of Oxygen), as well as review the existing literature regarding these distinct therapeutic modalities.

Concepts: Oxygen, Scar, Wound healing, Healing, Diving medicine, Hyperbaric medicine, Modality, Oxygen toxicity

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Fibronectin is an adhesive molecule that plays a crucial role in wound healing, particularly in extracellular matrix (ECM) formation and also in reepithelialisation. Fibronectin plays many different roles in the wound healing process because of the presence of specific function domains and binding sites in its structure. Fibronectin interacts with different cell types, cytokines and the ECM. The main role of fibronectin is ECM formation. First, plasma fibronectin forms a provisional fibrin-fibronectin matrix, which will later be replaced by the mature ECM-containing tissue fibronectin.

Concepts: Wound healing, Extracellular matrix, Healing, Fibronectin