Increasing severity of thermal injury causes delayed mobilization of circulating angiogenic cells (CACs) and impaired perfusion in a murine burn wound model

2008 ◽  
Vol 207 (3) ◽  
pp. S69-S70
Author(s):  
Xianjie Zhang ◽  
Xiaofei Wei ◽  
Lixin Liu ◽  
Guy Marti ◽  
Mohammed Ghanamah ◽  
...  
Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 713
Author(s):  
Nina Melnikova ◽  
Alexander Knyazev ◽  
Viktor Nikolskiy ◽  
Peter Peretyagin ◽  
Kseniia Belyaeva ◽  
...  

A design of new nanocomposites of bacterial cellulose (BC) and betulin diphosphate (BDP) pre-impregnated into the surface of zinc oxide nanoparticles (ZnO NPs) for the production of wound dressings is proposed. The sizes of crystalline BC and ZnO NPs (5–25%) corresponded to 5–6 nm and 10–18 nm, respectively (powder X-ray diffractometry (PXRD), Fourier-infrared (FTIR), ultraviolet (UV), atomic absorption (AAS) and photoluminescence (PL) spectroscopies). The biological activity of the wound dressings “BC-ZnO NPs-BDP” was investigated in rats using a burn wound model. Morpho-histological studies have shown that more intensive healing was observed during treatment with hydrophilic nanocomposites than the oleophilic standard (ZnO NPs-BDP oleogel; p < 0.001). Treatment by both hydrophilic and lipophilic agents led to increases in antioxidant enzyme activity (superoxide dismutase (SOD), catalase) in erythrocytes and decreases in the malondialdehyde (MDA) concentration by 7, 10 and 21 days (p < 0.001). The microcirculation index was restored on the 3rd day after burn under treatment with BC-ZnO NPs-BDP wound dressings. The results of effective wound healing with BC-ZnO NPs-BDP nanocomposites can be explained by the synergistic effect of all nanocomposite components, which regulate oxygenation and microcirculation, reducing hypoxia and oxidative stress in a burn wound.


2020 ◽  
Vol 41 (Supplement_1) ◽  
pp. S169-S170
Author(s):  
Angela R Jockheck-Clark ◽  
Cortes Williams ◽  
Christine Kowalczewski ◽  
Jahnabi Roy ◽  
Marc A Thompson ◽  
...  

Abstract Introduction During periods of delayed burn treatment, cells within the eschar leach toxic and immunomodulatory metabolites that can profoundly impact neighboring tissue. Therefore, to reduce the burn-related morbidities and mortalities that are the result of delayed surgical interventions, electrospinning was utilized to generate a novel cerium (III) nitrate (Ce(III)N) dressing. Previously published work has demonstrated that topical Ce(III)N application changes the eschar morphology, and that tissue beneath the treated eschar was generally healthy and had a high rate of graft acceptance. Methods Ce(III)N was dissolved with polyethylene oxide and spun onto a grounded rotating mandrel. The uni-axially spun mesh was compared to a co-axially electrospun dressing that contained a Ce(III)N core. Dressings were evaluated for topography/morphology, porosity and oxygen permeation using scanning electron microscopy, helium pycnometry, and a gas exchange chamber, respectively. Ce(III)N release rates were evaluated, as well as 60-day storage stability. Results All electrospun dressings contained functional Ce(III)N, with the co-axially spun dressing containing three times the amount of Ce(III)N as the traditionally spun dressing. Uni-axially and co-axially spun nanofibers had diameters of 1487±560 nm and 1071±147 nm, and porosities of 83.9% and 74.1%, respectively. Scaffolds released the majority of Ce(III)N within the first hour of wetting. Conclusions All dressings were capable of a burst of Ce(III)N release and maintained stability when stored at room temperature for 60 days. Applicability of Research to Practice Despite advancement in protective equipment worn by military personnel, the incidence of thermal injury is expected to rise in future conflicts. There are no burn wound dressings that can mitigate the pathophysiological processes associated with delayed burn wound treatment.


Author(s):  
Sujith V ◽  
Poornima G ◽  
Balaji O ◽  
Bairy Kl ◽  
Praveen K ◽  
...  

 Objective: Wound healing is a complex process, and various plant extracts have been used to study the effect of medicinal plants on wound healing. Healol oil is used in some tribal areas for ulcer healing and treatment of burn wounds. There are no animal studies done so far using healol oil to find out its role in the treatment of wounds. Hence, the aim of our study is to find the effect of healol oil in excision as well burn wounds in Wistar rats.Methods: Thirty-six Wistar rats were used, 18 rats in excision wound model and remaining in burn wound model. Each model consists of three groups of six rats each. Povidone-iodine was used as a standard control in excision wound model and silver sulfadiazine was used as a standard control in burn wound model. Healol oil was used as test drug in both the models. Period of epithelization and wound contracture rates were analyzed. Histopathological analysis of the skin tissue was done. One-way analysis of variance was used followed by Tukey’s post hoc test for statistical analysis using SPSS version 23 software, P value of <0.05 was taken as statistical significance.Results: Both standard and test groups showed significantly faster wound healing (p<0.001) compared to control rats treated with paraffin wax in both the models. In excision model standard povidone was significantly (p<0.001) better compared to healol oil whereas in burn model, silver sulfadiazine and healol oil showed comparable results with respect to period of epithelization without statistical significance (p>0.05).Conclusion: Wound healing property of healol oil is proved, and further clinical trial can be done to find out the effect of healol oil on chronic wounds due to various etiologies.


2021 ◽  
pp. 81-87
Author(s):  
N. V. Tuzyuk

Fundamental research in the field of burn wound development process highlights new pathogenetic mechanisms that underlie the improvement of medical practice, the main purpose of which is to create optimal conditions for early regeneration of the affected skin, as well as to eliminate the development of local and general complications. Irrational general and local treatment of wounds contribute to the slowing down of regenerative processes, thereby worsening the prognosis and consequences of thermal injury. It was found out that in patients of both study groups in the first period of the study the characteristics of the cellular composition of the wound impressions of the wound bottom of the area of thermal damage correspond to the degenerative type. In patients of the main group in the second term of the study in the area of thermal damage cells with high levels of functional and metabolic activity begin to appear, which increase antimicrobial resistance and reduce the risk of generalization of the infectious process which is the main source of burns. In patients of the main group, an increase in the activity of neutrophilic granulocytes in the induced test was found in the second term of the study, which, in our opinion, indicates the involvement of neutrophilic granulocytes with high functional and metabolic activity. Under conditions of significant activation of resident monocytes in response to injury in patients of the main group in the second and third term, the area of thermal damage migrates functionally effective monocytes. In patients of the main group the preservation of the activity of myeloperoxidase - the main enzyme of the oxygen-dependent phase of phagocytosis at the minimum subcompensated level, which leads to the preservation of the oxygen-dependent metabolic reaction of neutrophilic granulocytes in the subsequent study, Increases in the content of PAS-positive substances in neutrophilic granulocytes indicate the preservation of the functional reserve for activation and completion of the oxygen-independent phase of phagocytosis. The use of the developed treatment promotes the involvement of functionally active phagocytic cells in the burn wound, reduces the toxic load on monocytes and neutrophils, which helps to maintain their functional activity at the subcompensated level. These trends in patients of the main group reduce the risk of both local and general infectious complications of burn disease. It was found that the level of spontaneous functional activity in the HCT test is associated with the activity of resident monocytes. They form the primary barrier that protects the body from infection or harmful macromolecular complexes. Monocytes - "inflammatory", which constantly come from the free pool and their functional activity against microbial antigens is much higher than resident monocytes. An indicator of the activity of monocytes - "inflammatory" is an indicator of functional activity in the induced HCT test. The results of the study indicate that under conditions of significant activation of resident monocytes in response to injury in patients of the main group in the second and third terms of the area of thermal damage migrate functionally effective monocytes.


2015 ◽  
Vol 31 (5) ◽  
pp. 387-394
Author(s):  
E. A. Shchegelskaya ◽  
T. G. Grigorieva ◽  
E. A. Omelchenko ◽  
A. S. Zabirnyk ◽  
E. V. Markelova ◽  
...  

Burns ◽  
2014 ◽  
Vol 40 (3) ◽  
pp. 511-519 ◽  
Author(s):  
Hiroshi Ito ◽  
Sven Asmussen ◽  
Daniel L. Traber ◽  
Robert A. Cox ◽  
Hal K. Hawkins ◽  
...  

2020 ◽  
Vol 11 ◽  
Author(s):  
Evgenia Maslova ◽  
Yejiao Shi ◽  
Folke Sjöberg ◽  
Helena S. Azevedo ◽  
David W. Wareham ◽  
...  
Keyword(s):  

2018 ◽  
Vol 39 (suppl_1) ◽  
pp. S241-S241
Author(s):  
F M Egro ◽  
M Schusterman ◽  
D Kim ◽  
D Grybowski ◽  
I James ◽  
...  

2018 ◽  
Vol 26 (1) ◽  
pp. 16-26
Author(s):  
Tiam M. Saffari ◽  
Barthold N. Schüttenhelm ◽  
Johan. W. van Neck ◽  
Jan C. Holstege
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document