Skin Tissue Damage Research Articles

Opportunities and Challenges of Application of Cytosorb Therapy in Sepsis Management

Sepsis is a life-threatening organ dysfunction due to a dysregulated host response to infection. In 2017, an estimated 48·9 million incident cases of sepsis were recorded worldwide, and 11·0 million sepsis-related deaths were reported, representing 19·7% of all global deaths.1 Though overall data related to sepsis is poor but it is also a major health care challenge for resource limited countries. Severe sepsis is a significant & common health problem in ICU patients of Bangladesh2. A continuum of severity from sepsis to septic shock and multi-organ dysfunction syndrome (MODS) exists. MODS is a clinical syndrome characterized by the development of progressive and potentially reversible physiologic dysfunction in 2 or more organs or organ systems that is induced by a variety of acute insults, including sepsis. Sepsis leads to malignant intravascular inflammation, coagulopathy, circulatory derangement, tissue hypoxia, cytotoxicity and apoptosis. As a result, dysfunction of vital organ systems occur. Host response and other factors influenc outcome. Patients with sepsis must be treated with-timely, appropriate antibiotics, intravenousfluids, vasopressor and inotropic support & oxygen therapy.3 Other additional treatments including extracorporeal blood purification techniques (BPT). These techniques include hemofiltration, hemoperfusion, intermittent or continuous high-volume hemofiltration (HVHF), plasmapheresis or adsorption.4 The rationale behind such an approach is to achieve “immune homeostasis” which theoretically reduces the potential damage caused by dysregulation of the host response to infection. Given the pivotal role of cytokine production in sepsis, it follows that removal of these substances, through such BPT, may attenuate the response particularly in the early phase of sepsis.5 Indications include 1) Rhabdomyolysis resulting from Reperfusion syndrome, Trauma, Malignant Hyperthermia. 2) External injuries including Sepsis/Septic shock, Hemorrhagic shock, Trauma, Ruptured aortic aneurysm, Post-Cardiac Arrest Syndrome, Cardio-pulmonary resuscitation, Extensive surgery, Organ transplantation, Cardiosurgical intervention, Severe skin and soft tissue damage, Burns, Necrotizing fasciitis, Post-Cardiotomy Syndrome, Acute Respiratory Distress Syndrome. 3) Diseases: Pancreatitis, Liver insufficiency, Renal insufficiency, Stroke, Myocardial infarction, Cardiogenic shock/Heart failure, Tumor Lysis Syndrome, Hemophagocytosis Syndrome. Liver failure/Hyperbilirubinemia bridging to transplant or to recovery, Life-threatening bleeding under Direct Oral Anticoagulants (DOAC)6. Bangladesh Crit Care J September 2024; 12 (2): 79-80

The molecular mechanism of berberine affecting psoriasis skin inflammation by regulating keratinocyte pyroptosis via the p38 MAPK/NF-κB pathway.

Berberine (BBR), a Rhizoma Coptis-sourced isoquinoline alkaloid, is an effective drug for psoriasis treatment with its therapeutic mechanism remaining unclear. We delved into the mechanism of BBR affecting psoriatic skin inflammation by regulating keratinocyte pyroptosis. A psoriasis-like skin inflammation mouse model was induced by imiquimod (IMQ) and treated with BBR and a p38 activator anisomycin. Human epidermal keratinocytes (HEKs) were stimulated with five chemokines (M5) [interleukin (IL)-17A, IL-22A, oncostatin M, tumor necrosis factor-α, IL-1α] to simulate psoriasis immune microenvironment, then treated with BBR and anisomycin. Psoriasis skin lesions, skin tissue damage, cell viability and death, and gasdermin D-N (GSDMD-N) and NOD-like receptor protein 3 (NLRP3) positive cell numbers were assessed. The p38 mitogen-activated protein kinase (MAPK)/nuclear factor-kappa B (NF-κB) pathway and levels of the NLRP3/GSDMD pathway-related proteins and inflammatory factors were determined. BBR alleviated M5-induced HEK pyroptosis by inactivating NLRP3 inflammasomes. BBR inhibited the p38 MAPK/NF-κB pathway, and its effects on HEKs were partly averted by activating the p38 MAPK/NF-κB pathway. BBR repressed NLRP3 inflammasome activation and pyroptosis by inhibiting the p38 MAPK/NF-κB pathway. Collectively, BBR suppressed keratinocyte NLRP3/GSDMD pathway pyroptosis by suppressing the p38 MAPK/NF-κB pathway, thereby affecting psoriasis skin inflammation.

Chitosan-based hydrogel dressings with antibacterial and antioxidant for wound healing

Bacterial infection and free radical oxidative stress at the wound site could easily cause cascade inflammation and hinder the healing process of the wound. In this study, chitosan-cysteine-gallic acid (CCG) hydrogel with antibacterial and antioxidant properties was synthesized by chitosan (CS), cysteine (Cys), and gallic acid (GA) for a preliminary evaluation of its therapeutic efficacy in a mouse model of full-layer skin defect. In vitro analysis showed that the CCG hydrogel had good antibacterial activity and blood compatibility. In vivo, the CCG hydrogel wound dressings accelerated wound healing, stimulate angiogenesis, increase collagen deposition and anti-inflammatory factor expression. The CCG hydrogel wound dressing is designed to promote the regeneration of damaged skin tissue and is expected to become a potential candidate for clinical treatment.

Multifunctional carbomer based ferulic acid hydrogel promotes wound healing in radiation-induced skin injury by inactivating NLRP3 inflammasome

BackgroundRadiation-induced skin injury is a significant adverse reaction to radiotherapy. However, there is a lack of effective prevention and treatment methods for this complication. Ferulic acid (FA) has been identified as an effective anti-radiation agent. Conventional administrations of FA limit the reaching of it on skin. We aimed to develop a novel FA hydrogel to facilitate the use of FA in radiation-induced skin injury.MethodsWe cross-linked carbomer 940, a commonly used adjuvant, with FA at concentrations of 5%, 10%, and 15%. Sweep source optical coherence tomography system, a novel skin structure evaluation method, was applied to investigate the influence of FA on radiation-induced skin injury. Calcein-AM/PI staining, CCK8 assay, hemolysis test and scratch test were performed to investigate the biocompatibility of FA hydrogel. The reducibility of DPPH and ABTS radicals by FA hydrogel was also performed. HE staining, Masson staining, laser Doppler blood flow monitor, and OCT imaging system are used to evaluate the degree of skin tissue damage. Potential differentially expressed genes were screened via transcriptome analysis.ResultsGood biocompatibility and in vitro antioxidant ability of the FA hydrogels were observed. 10% FA hydrogel presented a better mechanical stability than 5% and 15% FA hydrogel. All three concentrations of FA remarkably promoted the recovery of radiation-induced skin injury by reducing inflammation, oxidative conidiation, skin blood flow, and accelerating skin tissue reconstruction, collagen deposition. FA hydrogel greatly inhibiting the levels of NLRP3, caspase-1, IL-18, pro-IL-1β and IL-1β in vivo and vitro levels through restraining the activation of NLRP3 inflammasome. Transcriptome analysis indicated that FA might regulate wound healing via targeting immune response, inflammatory response, cell migration, angiogenesis, hypoxia response, and cell matrix adhesion.ConclusionsThese findings suggest that the novel FA hydrogel is a promising therapeutic method for the prevention and treatment of radiation-induced skin injury patients.Graphical

An In-depth Analysis of the Adverse Effects of Ionizing Radiation Exposure on Cardiac Catheterization Staffs.

Diagnostic and interventional angiograms are instrumental in the multidisciplinary approach to CAD management, enabling accurate diagnosis and effective targeted treatments that significantly enhance patient care and cardiovascular outcomes. However, cath lab staff, including interventional cardiologists, is consistently exposed to ionizing radiation, which poses inherent health risks. Radiation exposure in the cath lab primarily results from the use of fluoroscopy and cineangiography during diagnostic and interventional procedures. Understanding these risks and implementing effective radiation protection measurements are imperative to ensure the well-being of healthcare professionals while delivering high-quality cardiac care. Prolonged and repeated exposure can lead to both deterministic and stochastic effects. Deterministic effects, such as skin erythema and tissue damage, are more likely to occur at high radiation doses. Interventional cardiologists and staff may experience these effects when safety measures are not rigorously followed. In fact, while ionizing radiation is essential in the practice of radiation cardiology ward, cath lab staff faces inherent risks from radiation exposure. Stochastic effects, on the other hand, are characterized by a probabilistic relationship between radiation exposure and the likelihood of harm. These effects include the increased risk of cancer, particularly for those with long-term exposure. Interventional cardiologists, due to their frequent presence in the cath lab, face a higher lifetime cumulative radiation dose, potentially elevating their cancer risk. Protective measures, including the use of lead aprons, thyroid shields, and radiation monitoring devices, play a crucial role in reducing radiation exposure for cath lab personnel. Adherence to strict dose optimization protocols, such as minimizing fluoroscopy time and maximizing distance from the radiation source, is also essential in mitigating these risks. Ongoing research and advancements in radiation safety technology are essential in further for minimizing the adverse effects of ionizing radiation in the cath lab.

Exploring the efficacy of negative pressure wound therapy in the management of mycobacterium ulcerans wounds: a comprehensive literature review

Mycobacterium ulcerans (M Ulcerans) infection leads to the debilitating Buruli ulcer (BU), characterized by necrotizing skin and soft tissue lesions. Conventional treatment primarily focuses on an antibiotic regimen, but wound management remains paramount to patient recovery. This literature review aims to evaluate the efficacy and benefits of Vacuum Assisted Dressing (VAC) in the treatment and management of BU wounds. A systematic literature search was undertaken using databases such as PubMed, Cinahl, Cochrane database, Joanna Briggs Institute, Medline, Internurse, Nursing & Allied Health database, and Scopus search from January 1995 to December 2023. The key search terms included “Mycobacterium ulcerans”, OR “Buruli ulcer”, AND “vacuum assisted dressing”, “vacuum assisted therapy”, “Vacuum Assisted Dressing”, “negative pressure wound therapy”, and “Negative Pressure Wound Therapy (NPWT)”. The exclusion criteria were animal studies and studies not in the English language. The current literature emphasizes the importance of antibiotic treatment for BU and highlights the skin and soft tissue damage that results in open, infected wounds. However, there is a notable lack of quantitative data on the efficacy of NPWT for treating BU wounds. Early evidence indicates that NPWT might accelerate wound healing, decrease secondary infections, and enhance wound bed readiness for grafting or secondary healing. While more comprehensive quantitative studies are warranted, NPWT emerges as a promising adjunctive therapy in the holistic management of BU wounds, offering benefits that may improve patient outcomes and reduce morbidity.

Antioxidant activity of Bougainvillea spectabilis ethanol extracts as an aryl hydrocarbon inhibitor

Background: Antioxidants overcome ageing processes and skin tissue damage caused by free radicals. The flavonoid contents of Bougainvillea spectabilis Willd contain hydroxyl groups attached to the carbon of the aromatic rings which makes them capable of catching free radicals and absorbing UV-A and UV-B. Objective: This study aimed to investigate the in silico antioxidant activities of various compounds contained in B. spectabilis Willd ethanol extracts compared to control. Method: The identification was carried out using GCMS methods and Molegro Virtual Docker. The molecular mechanics of scoring functions used in this study were the Rerank score, Root Mean Standard Deviation, and H Bond Result: p-Trimethylsylyoxylphenyl-(trimethylsilyoxy)trimethylsilyacrilate had a better bond than vitamin C used as the control and is smaller than BHF_401 (A) standard ligand, indicated by rerank scores of -92.6478, -76.0593, and -104.771. Conclusion: p-Trimethylsilyloxyphenyl-(trimethylsilyloxy)trimethylsilylacrylate had a better and more stable bond (rerank score: -92.6478) than the positive vitamin C control (76.0593).

The Potential Activity of Kecombrang (Etlingera elatior) Leaf, Flower, and Stem Extracts on the Duration of Wound Healing in Mice (Mus musculus)

Wound is skin tissue damage due to trauma from a sharp object. Kecombrang flower extract is known to be effective in speeding up the healing of wounds because it contains flavonoids, saponins, tannins and steroids. The leaves and stems also contain these compounds, so this research was conducted to see the difference in the potential activity of the wound healing process of the kecombrang plant on the time of wound healing. Natural ingredient extracts are wound healing agents that can fight infection and speed up wound healing. This study used 5 treatment groups consisting of control (-) distilled water, control (+) Povidone Iodine 10 %, leaf extract 10 %, flower extract 10 %, and stem extract 10 %. The parameters observed were the length of the wound and the condition of the wound until the wound healed. The obtained data were analyzed statistically using ANOVA for complately randomized factorial designed. The results of the research show that extracts of kecombrang leaves, flowers, and stems have activity in accelerating the healing process of cut wounds and produce different effects on healing time. Wound healing time for leaf extract is 12 days, flower extract and stem extract is 10 days. The conclusion of this study shows that there is a very real difference in wound healing from treatment with the best treatment for wound healing is the flower extract with highest healing score of 6.42.

Alcaligenes faecalis corrects aberrant matrix metalloproteinase expression to promote reepithelialization of diabetic wounds.

Chronic wounds are a common and costly complication of diabetes, where multifactorial defects contribute to dysregulated skin repair, inflammation, tissue damage, and infection. We previously showed that aspects of the diabetic foot ulcer microbiota were correlated with poor healing outcomes, but many microbial species recovered remain uninvestigated with respect to wound healing. Here, we focused on Alcaligenes faecalis, a Gram-negative bacterium that is frequently recovered from chronic wounds but rarely causes infection. Treatment of diabetic wounds with A. faecalis accelerated healing during early stages. We investigated the underlying mechanisms and found that A. faecalis treatment promotes reepithelialization of diabetic keratinocytes, a process that is necessary for healing but deficient in chronic wounds. Overexpression of matrix metalloproteinases in diabetes contributes to failed epithelialization, and we found that A. faecalis treatment balances this overexpression to allow proper healing. This work uncovers a mechanism of bacterial-driven wound repair and provides a foundation for the development of microbiota-based wound interventions.

Multifunctional Molybdenum-Based Nanoclusters Engineered Gelatin Methacryloyl as In Situ Photo-Cross-Linkable Hybrid Hydrogel Dressings for Enhanced Wound Healing.

Skin injuries and wounds present significant clinical challenges, necessitating the development of advanced wound dressings for efficient wound healing and tissue regeneration. In this context, the advancement of hydrogels capable of counteracting the adverse effects arising from undesirable reactive oxygen species (ROS) is of significant importance. This study introduces a hybrid hydrogel with rapid photocuring and excellent conformability, tailored to ameliorate the hostile microenvironment of damaged skin tissues. The hybrid hydrogel, composed of photoresponsive Gelatin Methacryloyl (GelMA) and Molybdenum-based nanoclusters (MNC), exhibits physicochemical characteristics conductive to skin regeneration. In vitro studies demonstrated the cytocompatibility and ROS-responsive behavior of the MNC/GelMA hybrid hydrogels, confirming their ability to promote human dermal fibroblasts (HDF) functions. The incorporation of MNC into GelMA not only enhances HDF adhesion, proliferation, and migration but also shields against oxidative damage induced by hydrogen peroxide (H2O2). Notably, in vivo evaluation in murine full-thickness skin defects revealed that the application of hybrid hydrogel dressings led to reduced inflammation, accelerated wound closure, and enhanced collagen deposition in comparison to control groups. Significantly, this study introduced a convenient approach to develop in situ ROS-scavenging hydrogel dressings to accelerate the wound healing process without the need for exogenous cytokines or medications. We consider that the nanoengineering approach proposed herein offers potential possibilities for the development of therapeutic hydrogel dressings addressing various skin-related conditions.

Enhanced Fibrogenesis Activity in Diabetic Wound Using 20% Anredera scandens (L.) Moq. Leaves Extract Ointment in Sprague dawley Rats

Background: In diabetic conditions, decreased glucose-6-phosphate dehydrogenase activity results in reduced nitric oxide synthesis. Reduced nitric oxide synthesis results in the production of ROS. This may impede the processes of angiogenesis and vasoconstriction and prolong inflammation. Objective: We were interested in investigating the mechanism by which 20% of Anredera scandens leaves extract ointment increases fibrogenesis activity because this condition can affect the development of damaged skin tissue. This study's design is a post-test-only laboratory experiment. Material and methods: The study employed male Sprague dawley strain rats that were induced with 40 mg/kgBW of STZ. The mice were divided into four groups: the negative group (which got diabetic wounds only), the positive group (which got Gentamicin ointment), and the test group (which got 20% extract ointment). Results: The skin tissue from each group was then examined histopathologically. After receiving 20% ointment of Anredera scandens leaves extract, the test group's mean fibrogenesis histopathology score on day 14 was significantly higher (P=0.022) at 3.75 than that of the negative group, which had a mean score of 2.75. Following that, the skin tissue of both the extract test group and the normal group was examined histopathologically. In comparison to the normal group mean score of 4.0 on day 14, the test group, which received 20% ointment of Anredera scandens leaves extract, had a non-significant (P=0.317) mean fibrogenesis histopathology score of 3.75. Subsequently, skin tissue was examined histopathologically for both the positive and normal groups. According to the results, on day 14, the positive group's average fibrogenesis histopathology score was 3.5, while the normal group's average score was 4.0. This difference was not statistically significant (P=0.127). Conclusions: Thus, it can be said that 20% Anredera scandens leaf extract ointment is comparable to gentamicin ointment in its capacity to promote fibrogenesis activity in diabetic wounds.

Enhancement of Wound Healing and Angiogenesis Using Mouse Embryo Fibroblasts Loaded in Decellularized Skin Scaffold.

Synthetic and natural polymer scaffolds can be used to design wound dressing for repairing the damaged skin tissue. This study investigated acute wound healing process using a decellularized skin scaffold and mouse embryo fibroblast (MEF). Mouse skin fragments were decellularized and evaluated by DNA content, toxicity, H&E staining, Raman confocal microscopy, Masson’s trichrome staining, SEM, and biodegradation assays. The fragments were recellularized by the MEFs, and cell attachment and penetration were studied. De- and decellularized scaffolds were used wound dressings in mouse acute wound models as two experimental groups. Using morphological and immunohistochemical assessments, wound healing was evaluated and compared among the experimental and control groups. DNA content of the decellularized tissue significantly reduced compared to the native control group (7% vs. 100%; p < 0.05). extracellular matrix components, e.g. collagen types I, III, and IV, elastin, and glycosaminoglycan, were well preserved in the decellularized group. The porosity and fiber arrangement in the stroma had a structure similar to normal skin tissue. A significant reduction in healing time was observed in the group treated with a decellularized scaffold. A thicker epidermis layer was observed in the recovered tissue in both experimental groups compared to the control group. Immunostaining showed a positive reaction for CD31 as an endothelial marker in both experimental groups, confirming new vascularization in these groups. Using MEFs with decellularized skin as a wound dressing increases the rate of wound healing and also the formation of new capillaries. This system could be beneficial for clinical applications in the field of tissue engineering.

Composite nano hydrogel with dual response and hierarchical drug release for enhanced wound healing

A novel nanocomposite hydrogel with photothermal therapeutic properties, which could enhance the healing of surgical wounds, was developed. The composite comprises functionalized silica nanoparticles (FSNs) loaded with desferoxamine (DFO) as the core and a dexamethasone (Dex) filled hyaluronic acid–chitosan hydrogel (HA-CS) as the shell. Dex can effectively control inflammation at the wound site, and DFO is beneficial in proliferating the skin cells. The two drugs effectively promote wound healing at the surgical site. The aim of this approach is to demonstrate the hierarchical and continuous release of Dex and DFO from the FSNs@DFO-H@Dex system to reduce wound inflammation and promote healing. Furthermore, the controlled release of DFO can be achieved by controlling the near-infrared illumination. The composite nano hydrogel has a photothermal response, which accelerates wound healing by effectively reducing inflammation through the controlled release of drugs and regulating the immunological response of damaged skin tissue.

Pain Assessment in Patients Undergoing Maggot Debridement Therapy in the Process of Local Treatment of Chronic Wounds

(1) Background: Developing and implementing strategies for local wound care focused on improving the quality of life related to health status and reducing treatment costs for this patient group poses a challenge to contemporary healthcare systems. The utilization of Maggot Debridement Therapy (MDT) is one potential form of local therapy for preparing wounds for the healing process. The debridement of the wound bed with medical maggots is highly precise, and the defensins produced by the larvae eliminate bacteria and stimulate tissue regeneration. However, the presence of larvae in the wound may lead to the occurrence of pain symptoms. The aim of the study was to assess the intensity of pain during larval therapy in patients with chronic wounds treated in outpatient settings. (2) Patients and Methods: The study employed a diagnostic survey and estimation; the tool consisted of a research protocol comprising three parts (questionnaires). Inclusion criteria for the study were voluntary consent to participate (completion of the MDT acceptance questionnaire), chronic wounds of vascular etiology or pressure injuries, full-thickness skin or deep tissue damage, and pain intensity not exceeding four on the NRS (Numerical Rating Scale: 0—no pain, 10—the most severe pain) at the time of the study. Patient observation during the 3-day treatment was conducted by a wound care clinic nurse, assessing pain intensity once every 24 h during the larval dressing changes. (3) Results: Out of 348 individuals who qualified for MDT during the study period, 215 individuals participated in the study: 94 women (43.7%) and 121 men (56.3%). The age of the participants ranged from 28 to 97 years (mean 69.87 ± 12.95). Each participant experienced mild pain (2.26 ± 1.60 on the NRS) on the day of qualification for the study. An increase in pain intensity, according to subjective assessments, was reported by 29.3% of participants (n = 63). On the third day of MDT therapy, an increase in pain intensity was observed, reaching a mean value of 4.79 ± 2.12 (p &lt; 0.0001). Participants with pressure injuries showed the lowest pain intensity, which increased in consecutive days for all types of wounds. Additionally, the increase in pain intensity in patients with vascular etiology wounds was greater compared to patients with pressure injuries (p &lt; 0.001). (4) Conclusions: Local wound therapy with Lucilia sericata larvae increases pain intensity in the consecutive days of treatment. The wound area and the time since its occurrence may determine pain symptoms.

A bioactive composite hydrogel dressing that promotes healing of both acute and chronic diabetic skin wounds

Mesenchymal stem cell derived exosomes (MSC-Exos) demonstrate beneficial effects on wound healing via anti-inflammatory and angiogenic properties. Chitosan (CS) exhibits excellent biocompatibility and accelerates cellular migration, adhesion, and proliferation. The ions released from bioactive glass (BG) and titanium dioxide (TiO2) nanoparticles exhibit sustained angiogenic and antibacterial potency. In this study, CMCS-CEBT hydrogel was synthesized from exosomes encapsulated carboxymethyl chitosan (CMCS), chitosan nanoparticles (CS-NPs), BG, and TiO2 nanoparticles for a preliminary evaluation of its impacts on the treatment of full-thickness skin defects, diabetic wounds, and burn skin injury due to burns. In vitro analysis indicated that the hydrogel exhibits excellent cell compatibility, stimulates endothelial cell adhesion and proliferation, and presents anti-inflammatory, angiogenic, and antibacterial activities. In vivo, the composite hydrogel dressing accelerated a wound healing acceleration effect, stimulated angiogenesis, and increased collagen deposition and the expression of anti-inflammatory factors. This innovative composite hydrogel dressing as a potential clinical therapy, utilizing bioactive materials, holds promise as a potential clinical therapy that aims to facilitate the regeneration of acute and chronically damaged skin tissue.

Fabrication, characterization, and in vivo implantation of eugenol-loaded nanogels and PCL/Cs electrospun nanofibers for wound healing applications

Developing wound dressings with a high potential to cover damaged skin tissue and facilitate cell adhesion and migration at the injury site is crucial in skin tissue engineering to accelerate wound healing. Electrospun nanofibers from natural/synthetic polymers are amongst the favorable wound dressings with appropriate physicochemical and biological properties. As well, nanoformulations of phenolic phytochemical “eugenol” have been shown to fasten wound healing via various anti-inflammatory and anti-oxidant effects. Herein, we developed a bi-component wound dressing of PCL/Cs electrospun nanofibers and eugenol nanogel to investigate its effects on tissue healing in vivo. PCL/Cs nanofibers were fabricated using an electrospinning method at the 15:1 ratio, and eugenol-loaded nanogels were synthesized by adding carboxymethylcellulose as the gelling agent, and their physicochemical characteristics were assessed. Scaffolds were implanted in a full-thickness excision wound model in Wistar rats, followed up for 21 days. The results showed that electrospun nanofibers had an average diameter of 228 nm with uniform and smooth morphology aligned randomly. Eugenol-loaded nanogel showed an average size distribution of 126 nm. Eugenol-loaded nanogel and nanogel + nanofiber groups significantly reduced wound surface area over 21 days. Histological evaluations showed that Eugenol-loaded nanogel and nanogel + nanofiber groups developed the full-thickness epidermis with the complete epithelium and stratum corneum, angiogenesis, and low macrophage infiltration in which predominantly mature collagen fibers were poorly and well organized, respectively. The combination of eugenol-loaded nanogel + PCL/Cs nanofiber accelerated wound healing by reducing inflammation, and edema along with enhancing angiogenesis, collagen synthesis, and re-epithelialization.

CARICA PAPAYA L. WITH SUTURE WOUND HEALING IN MICE EXPERIMENTAL ANIMALS

Background: Stitches are a condition in which skin tissue damage results from incisions or surgery and trauma. Carica Papaya Linn contains flavonoids which are efficacious as anti-inflammatory or antiseptic in inhibiting bacterial growth. Carica Papaya Linn is effective in repairing cells damaged by free radicals. The purpose of this study was to see the effectiveness of papaya leaf extract (Carica Papaya Linn) against stitches. Method: This research was quantitative research with a True Experimental design with the one group post-test method using the REEDA scale assessment. The population in this study were mice (Mus Musculus) which were divided into 5 groups, control group, nebacetin group, 5% test group, 10% test group and 15% test group. Research was conducted in the Lab. Medical Laboratory Technology at Muhammadiyah University of Sidoarjo and for making extracts from the Faculty of Mathematics and Natural Sciences, Surabaya State University. Data was collected and then the results were analysed using the One Way ANOVA statistical test. Result: The results of the statistical test showed a value of P = 0.000 in the 7th day group, which means there was a difference in each group of mice and the mean results showed the lowest result was 0.2 in the 15% extract which stated the best wound healing. Conclusion : The conclusion of the study was that there was an effect of giving papaya leaf extract (Carica Papaya L.) on wound healing in experimental mice.

The JAK/STAT/NF-κB signaling pathway can be regulated by rosemary essential oil, thereby providing a potential treatment for DNCB-induced in mice

ObjectiveThe purpose of this study was to investigate the mechanism through which rosemary essential oil treats atopic dermatitis. MethodsA dinitrochlorobenzene (DNCB)-induced atopic dermatitis mouse model was established and treated with low (1%), medium (2%), and high (4%) doses of Rosmarinus officinalis essential oil (EORO). Serum levels of interleukin (IL)−6 and tumor necrosis factor-alpha (TNF-α) in each group were determined using enzyme-linked immunosorbent assay (ELISA). Skin tissues were stained with hematoxylin-eosin and toluidine blue. We used network pharmacology and molecular docking techniques to verify the biological activity of essential proteins and their corresponding compounds in the pathway. Gas chromatography-mass spectrometry (GC-MS) was used for metabolomics analysis and multivariate statistical analysis of mouse serum to screen differential metabolites and metabolic pathway analysis. Protein expression of p-JAK1, CD4+ cells, and IL-4 in the skin tissue was detected by immunohistochemistry analysis. Protein levels of STAT3, p-STAT3, P65, and p-P65 in damaged skin tissues were detected using western blotting. ResultThe skin of mice in the model group showed different degrees of erythema, dryness, scratches, epidermal erosion and shedding, and crusting. After treatment, the serum levels of IL-6 and TNF-α in EORO group were significantly decreased, and the expression of p-JAK1,CD4 + cells, IL-4, p-P65 / P65 and p-STAT3 / STAT3 proteins in skin tissues were decreased. ConclusionEORO can effectively improve DNCB-induced AD-like skin lesions in mice by regulating the JAK/STAT/NF-κB signaling pathway, thereby reducing the production of downstream arachidonic acid metabolites, inhibiting skin inflammation, and restoring epidermal barrier function.

Thermosensitive black phosphorus hydrogel loaded with silver sulfadiazine promotes skin wound healing

Wounds can lead to skin and soft tissue damage and their improper management may lead to the growth of pathogenic bacteria at the site of injury. Identifying better ways to promote wound healing is a major unmet need and biomedical materials with the ability to promote wound healing are urgently needed. Here, we report a thermosensitive black phosphorus hydrogel composed of black phosphorus nano-loaded drug silver sulfadiazine (SSD) and chitosan thermosensitive hydrogel for wound healing. The hydrogel has temperature-sensitive properties and enables the continuous release of SSD under near-infrared irradiation to achieve synergistic photothermal and antibacterial treatment. Additionally, it exerts antibacterial effects on Staphylococcus aureus. In a rat skin injury model, it promotes collagen deposition, boosts neovascularization, and suppresses inflammatory markers. In summary, the excellent thermosensitivity, biocompatibility, and wound-healing-promoting qualities of the reported thermosensitive hydrogel make it suitable as an ideal wound dressing in the clinic.

Ameliorative effect of black tea extract on the skin of D-galactose-induced aging mice.

Aging is a universal and irreversible process, and the skin is an important feature that reflects the aging of the organism. Skin aging has been a focus of attention in recent years because it leads to changes in an individual's external features and the loss of many important biological functions. This experiment investigated the improvement effect of black tea extract (BTE) on the skin of aging mice under D-galactose induction. After 6 weeks of administration, the changes in skin bio-chemical indices and tissue structure were compared with the blank and positive control groups. It was observed that BTE increased water and hyaluronic acid (HA) content, decreased malondialdehyde (MDA) content, enhanced superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and catalase (CAT) activities in the skin of aging mice, and improved the structure of aging damaged skin tissues and increased the content of total collagen. The experimental results showed that BTE can play a significant anti-aging effect on the skin, which can be used as a functional food for aging inhibition.