scholarly journals In VitroStudies of Bacterial Cellulose and Magnetic Nanoparticles Smart Nanocomposites for Efficient Chronic Wounds Healing

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Bianca Galateanu ◽  
Mihaela-Cristina Bunea ◽  
Paul Stanescu ◽  
Eugenia Vasile ◽  
Angela Casarica ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Bacterial Cellulose ◽  
Social Impact ◽  
Chronic Wounds ◽  
De Novo ◽  
Healing Process ◽  
Cell Based Therapy ◽  
Undifferentiated Cells ◽  
Engineering Strategy ◽  
Innovative Materials

The quality of life of patients with chronic wounds can be extremely poor and, therefore, over the past decades, great efforts have been made to develop efficient strategies to improve the healing process and the social impact associated with these conditions. Cell based therapy, as a modern tissue engineering strategy, involves the design of 3D cell-scaffold bioconstructs obtained by preseeding drug loaded scaffolds with undifferentiated cells in order to achievein situfunctionalde novotissue. This paper reports on the development of bionanocomposites based on bacterial cellulose and magnetic nanoparticles (magnetite) for efficient chronic wounds healing. Composites were obtained directly in the cellulose bacterial culture medium by dispersing various amounts of magnetite nanoparticles during the biosynthesis process. After purification and drying, the membranes were characterized by Raman spectroscopy and X-ray diffraction to reveal the presence of magnetite within the bacterial cellulose matrix. Morphological investigation was employed through SEM and TEM analyses on bionanocomposites. The biocompatibility of these innovative materials was studied in relation to human adipose derived stem cells in terms of cellular morphology, viability, and proliferation as well as scaffolds cytotoxic potential.

scholarly journals Polymer-Based Scaffolds Loaded with Aloe vera Extract for the Treatment of Wounds

Pharmaceutics ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 961
Author(s):  
Sibusiso Alven ◽  
Vuyolwethu Khwaza ◽  
Opeoluwa O. Oyedeji ◽  
Blessing A. Aderibigbe
Keyword(s):  
Wound Healing ◽  
Chronic Wounds ◽  
Mechanical Performance ◽  
Healing Process ◽  
Aloe Vera ◽  
Antimicrobial Properties ◽  
Biological Properties ◽  
Wound Management ◽  
Wound Healing Process ◽  
Treatment Of Wounds

The treatment of wounds is one challenging biomedical field due to delayed wound healing common in chronic wounds. Several factors delay wound healing, including microbial infections, malnutrition, underlying physiological conditions, etc. Most of the currently used wound dressing materials suffer from poor antimicrobial properties, poor biodegradability and biocompatibility, and weak mechanical performance. Plant extracts, such as Aloe vera, have attracted significant attention in wound management because of their interesting biological properties. Aloe vera is composed of essential constituents beneficial for the wound healing process, such as amino acids, vitamins C and E, and zinc. Aloe vera influences numerous factors that are involved in wound healing and stimulates accelerated healing. This review reports the therapeutic outcomes of aloe vera extract-loaded polymer-based scaffolds in wound management.

Identifying New Pathways and Targets for Wound Healing and Therapeutics from Natural Sources

2021 ◽  
Vol 18 ◽  
Author(s):  
Xinchi Feng ◽  
Jinsong Hao
Keyword(s):  
Wound Healing ◽  
Molecular Mechanisms ◽  
Chronic Wounds ◽  
Wound Care ◽  
Healing Process ◽  
Unmet Need ◽  
Wound Dressings ◽  
Wound Healing Process ◽  
Natural Sources ◽  
Viable Approach

: Chronic wounds remain a significant public problem and the development of wound treatments has been a research focus for the past few decades. Despite advances in the products derived from endogenous substances involved in a wound healing process (e.g. growth factors, stem cells, and extracellular matrix), effective and safe wound therapeutics are still limited. There is an unmet need to develop new therapeutics. Various new pathways and targets have been identified and could become a molecular target in designing novel wound agents. Importantly, many existing drugs that target these newly identified pathways could be repositioned for wound therapy, which will facilitate fast translation of research findings to clinical applications. This review discusses the newly identified pathways/targets and their potential uses in the development of wound therapeutics. Some herbs and amphibian skins have been traditionally used for wound repairs and their active ingredients have been found to act in these new pathways. Hence, screening these natural products for novel wound therapeutics remains a viable approach. The outcomes of wound care using natural wound therapeutics could be improved if we can better understand their cellular and molecular mechanisms and fabricate them in appropriate formulations, such as using novel wound dressings and nano-engineered materials. Therefore, we also provide an update on the advances in the wound therapeutics from natural sources. Overall, this review offers new insights into novel wound therapeutics.

scholarly journals Efficiency of Enzymatic Debridement in the Healing Process of Chronic Wounds in Small Animal Practice

2017 ◽  
Vol 61 (1) ◽  
pp. 38-42 ◽  
Author(s):  
L. Hamilton ◽  
M. Kožár
Keyword(s):  
Chronic Wounds ◽  
Healing Process ◽  
Small Animal ◽  
Skin Defect ◽  
Skin Wounds ◽  
Macroscopic Appearance ◽  
Enzyme Preparations ◽  
Chronic Skin ◽  
The Individual ◽  
Enzymatic Debridement

Abstract Skin wounds are a common presentation in small animal practice. These wounds may be acute or chronic with a complicated healing process. An important aspect of the healing of wounds is debridement which may be carried out by surgical, autolytic, mechanical or enzymatic methods. The debridement method is chosen according to the individual skin defect and influenced by factors such as wound size and location, the age of the wound, and the presence of infection or exudate. Enzymatic debridement is a method that is not commonly used in veterinary practice, and involves the use of enzyme preparations to remove necrotic tissue from a wound. The aim of this study was to investigate the effects of the enzymatic ointment collagenase as a method of debridement, and its effect on the macroscopic appearance of chronic skin wounds in cats and dogs. We observed that the application of Iruxol Mono directly to the wound changes the progress of the healing process, with no obvious adverse effects. The time of healing of chronic wounds was decreased and healthy granulation tissue was developed within a couple of days after application of the ointment. Enzymatic debridement appears to be a promising method of debridement for use in chronic wounds, and should be considered in cases where more conventional methods of debridement are ineffective or unsuitable.

scholarly journals Bioactive Agent-Loaded Electrospun Nanofiber Membranes for Accelerating Healing Process: A Review

Membranes ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 702
Author(s):  
Seyyed-Mojtaba Mousavi ◽  
Zohre Mousavi Nejad ◽  
Seyyed Alireza Hashemi ◽  
Marjan Salari ◽  
Ahmad Gholami ◽  
...  
Keyword(s):  
Wound Healing ◽  
Chronic Wounds ◽  
Therapeutic Potential ◽  
Healing Process ◽  
Wound Dressings ◽  
Future Research ◽  
Wound Healing Process ◽  
Nanofiber Membranes ◽  
Bioactive Agents ◽  
Bioactive Agent

Despite the advances that have been achieved in developing wound dressings to date, wound healing still remains a challenge in the healthcare system. None of the wound dressings currently used clinically can mimic all the properties of normal and healthy skin. Electrospinning has gained remarkable attention in wound healing applications because of its excellent ability to form nanostructures similar to natural extracellular matrix (ECM). Electrospun dressing accelerates the wound healing process by transferring drugs or active agents to the wound site sooner. This review provides a concise overview of the recent developments in bioactive electrospun dressings, which are effective in treating acute and chronic wounds and can successfully heal the wound. We also discuss bioactive agents used to incorporate electrospun wound dressings to improve their therapeutic potential in wound healing. In addition, here we present commercial dressings loaded with bioactive agents with a comparison between their features and capabilities. Furthermore, we discuss challenges and promises and offer suggestions for future research on bioactive agent-loaded nanofiber membranes to guide future researchers in designing more effective dressing for wound healing and skin regeneration.

scholarly journals Photobiomodulation of Human Fibroblasts and Keratinocytes with Blue Light: Implications in Wound Healing

2020 ◽  
Author(s):  
Francesca Rossi ◽  
Giada Magni ◽  
Francesca Tatini ◽  
Martina Banchelli ◽  
Federica Cherchi ◽  
...  
Keyword(s):  
Wound Healing ◽  
Blue Light ◽  
Chronic Wounds ◽  
Human Fibroblasts ◽  
Healing Process ◽  
Research Area ◽  
Wound Management ◽  
Blue Led ◽  
Led Light ◽  
New Research

In recent years, photobiomodulation (PBM) has been recognized as a physical therapy in wound management. Despite several published research papers, the mechanism underlying photobiomodulation is still not completely understood. The investigation about application of blue light to improve wound healing is a relatively new research area. Tests in selected patients evidenced a stimulation of the healing process in superficial and chronic wounds treated with a blue LED light emitting at 420 nm; a study in animal model pointed out a faster healing process in superficial wound, with an important role of fibroblasts and myofibroblasts. Here we present a study aiming at evidencing the effects of blue light on the proliferation and metabolism in fibroblasts and keratinocytes. Different light doses were used to treat the cells, evidencing inhibitory and stimulatory effects. Electrophysiology was used to investigate the effects on membrane currents, while Raman spectroscopy revealed the mitochondrial Cytochrome C (Cyt C) oxidase dependence on blue light irradiation. In conclusion, we observed that the blue LED light can be used to modulate the activity of human fibroblasts, and the effects in wound healing are particularly evident when studying the fibroblasts and keratinocytes co-cultures.

scholarly journals Silk derived formulations for accelerated wound healing in diabetic mice

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10232
Author(s):  
Muniba Tariq ◽  
Hafiz Muhammad Tahir ◽  
Samima Asad Butt ◽  
Shaukat Ali ◽  
Asma Bashir Ahmad ◽  
...  
Keyword(s):  
Wound Healing ◽  
Silk Fibroin ◽  
Chronic Wounds ◽  
Histological Analysis ◽  
Healing Process ◽  
Aloe Vera ◽  
Wound Contraction ◽  
Wound Dressings ◽  
Control Group ◽  
Diabetic Mice

Background The present study aimed to prepare effective silk derived formulations in combination with plant extract (Aloe vera gel) to speed up the wound healing process in diabetic mice. Methods Diabetes was induced in albino mice by using alloxan monohydrate. After successful induction of diabetes in mice, excision wounds were created via biopsy puncture (6 mm). Wound healing effect of silk sericin (5%) and silk fibroin (5%) individually and in combination with 5% Aloe vera gel was evaluated by determining the percent wound contraction, healing time and histological analysis. Results The results indicated that the best biocompatible silk combination was of 5% silk fibroin and 5% Aloe vera gel in which wounds were healed in 13 days with wound contraction: 98.33 ± 0.80%. In contrast, the wound of the control group (polyfax) healed in 19 day shaving 98.5 ± 0.67% contraction. Histological analysis revealed that the wounds which were treated with silk formulations exhibited an increased growth of blood vessels, collagen fibers, and much reduced inflammation. Conclusion It can be concluded that a combination of Bombyx mori silk and Aloe vera gel is a natural biomaterial that can be utilized in wound dressings and to prepare more innovative silk based formulations for speedy recovery of chronic wounds.

Chronic wounds of traumatic origin and oral cancer arising de novo: A potential association?

Oral Oncology ◽  
2022 ◽  
Vol 125 ◽  
pp. 105711
Author(s):  
Gerardo Gilligan ◽  
Eduardo Piemonte ◽  
Jerónimo Lazos ◽  
René Panico
Keyword(s):  
Oral Cancer ◽  
Chronic Wounds ◽  
De Novo ◽  
Potential Association ◽  
Traumatic Origin

Bacterial Cellulose-Based Nanocomposites: Roadmap for Innovative Materials

2014 ◽  
pp. 17-64 ◽  
Author(s):  
Ana R. P. Figueiredo ◽  
Carla Vilela ◽  
Carlos Pascoal Neto ◽  
Armando J. D. Silvestre ◽  
Carmen S. R. Freire
Keyword(s):  
Bacterial Cellulose ◽  
Innovative Materials

scholarly journals Functional Mining of the Crotalus Spp. Venom Protease Repertoire Reveals Potential for Chronic Wound Therapeutics

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3401
Author(s):  
David Meléndez-Martínez ◽  
Luis Fernando Plenge-Tellechea ◽  
Ana Gatica-Colima ◽  
Martha Sandra Cruz-Pérez ◽  
José Manuel Aguilar-Yáñez ◽  
...  
Keyword(s):  
Wound Healing ◽  
Serine Proteases ◽  
Chronic Wounds ◽  
Chronic Wound ◽  
Healing Process ◽  
Wound Healing Process ◽  
Major Health Problem ◽  
Normal Wound Healing ◽  
Alternative Sources ◽  
Fibrin Clots

Chronic wounds are a major health problem that cause millions of dollars in expenses every year. Among all the treatments used, active wound treatments such as enzymatic treatments represent a cheaper and specific option with a fast growth category in the market. In particular, bacterial and plant proteases have been employed due to their homology to human proteases, which drive the normal wound healing process. However, the use of these proteases has demonstrated results with low reproducibility. Therefore, alternative sources of proteases such as snake venom have been proposed. Here, we performed a functional mining of proteases from rattlesnakes (Crotalus ornatus, C. molossus nigrescens, C. scutulatus, and C. atrox) due to their high protease predominance and similarity to native proteases. To characterize Crotalus spp. Proteases, we performed different protease assays to measure and confirm the presence of metalloproteases and serine proteases, such as the universal protease assay and zymography, using several substrates such as gelatin, casein, hemoglobin, L-TAME, fibrinogen, and fibrin. We found that all our venom extracts degraded casein, gelatin, L-TAME, fibrinogen, and fibrin, but not hemoglobin. Crotalus ornatus and C. m. nigrescens extracts were the most proteolytic venoms among the samples. Particularly, C. ornatus predominantly possessed low molecular weight proteases (P-I metalloproteases). Our results demonstrated the presence of metalloproteases capable of degrading gelatin (a collagen derivative) and fibrin clots, whereas serine proteases were capable of degrading fibrinogen-generating fibrin clots, mimicking thrombin activity. Moreover, we demonstrated that Crotalus spp. are a valuable source of proteases that can aid chronic wound-healing treatments.

scholarly journals Chitosan/Glycosaminoglycan Scaffolds: The Role of Silver Nanoparticles to Control Microbial Infections in Wound Healing

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1207 ◽  
Author(s):  
Giuseppina Sandri ◽  
Dalila Miele ◽  
Angela Faccendini ◽  
Maria Cristina Bonferoni ◽  
Silvia Rossi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Chondroitin Sulfate ◽  
Chronic Wounds ◽  
Healing Process ◽  
Antimicrobial Properties ◽  
Fibroblast Proliferation ◽  
Nanofibrous Scaffolds ◽  
Microbial Infections ◽  
Traumatic Wound ◽  
Scaffold Degradation

Cutaneous wounds represent a major issue in medical care, with approximately 300 million chronic and 100 million traumatic wound patients worldwide, and microbial infections slow the healing process. The aim of this work was to develop electrospun scaffolds loaded with silver nanoparticles (AgNPs) to enhance cutaneous healing, preventing wound infections. AgNPs were directly added to polymeric blends based on chitosan (CH) and pullulan (PUL) with hyaluronic acid (HA) or chondroitin sulfate (CS) to be electrospun obtaining nanofibrous scaffolds. Moreover, a scaffold based on CH and PUL and loaded with AgNPs was prepared as a comparison. The scaffolds were characterized by chemico–physical properties, enzymatic degradation, biocompatibility, and antimicrobial properties. All the scaffolds were based on nanofibers (diameters about 500 nm) and the presence of AgNPs was evidenced by TEM and did not modify their morphology. The scaffold degradation was proven by means of lysozyme. Moreover, the AgNPs loaded scaffolds were characterized by a good propensity to promote fibroblast proliferation, avoiding the toxic effect of silver. Furthermore, scaffolds preserved AgNP antimicrobial properties, although silver was entrapped into nanofibers. Chitosan/chondroitin sulfate scaffold loaded with AgNPs demonstrated promotion of fibroblast proliferation and to possess antimicrobial properties, thus representing an interesting tool for the treatment of chronic wounds.

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