?-Glucan treatment prevents progressive burn ischaemia in the zone of stasis and improves burn healing: An experimental study in rats
Küçük Resim Yok
Tarih
2013
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Saving the zone of stasis is one of the major goals of burn specialists. Increasing the tissue tolerance to ischaemia and inhibiting inflammation have been proposed to enable salvage of this zone. After a burn, excessive inflammation, including increased vascular permeability, local tissue oedema and neutrophil activation, causes local tissue damage by triggering vascular thrombosis and blocking capillaries, resulting in tissue ischaemia and necrosis. Oxygen radicals also contribute to tissue damage after a burn. However, macrophages play a pivotal role in the response to burn. We studied beta-glucan because of its many positive systemic effects that are beneficial to burn healing, including immunomodulatory effects, antioxidant effects (free-radical scavenging activity) and effects associated with the reduction of the inflammatory response. There were four test groups in this study with eight rats in each group. Group 1 was the control group, group 2 was administered a local pomade (bacitracin + neomycin sulphate), group 3 received beta-glucan (50 mg kg(-1), orally) + the local pomade and group 4 received beta-glucan. Burns were created using a brass comb model. Macroscopic, histopathological and statistical assessments were performed. Samples were harvested on the 3rd, 7th and 21 days for analysis. The neutrophilic infiltration into the zone of stasis was analysed on day 3. Macrophage infiltration, fibroblast proliferation, angiogenesis and re-epithelialisation ratios in the zone of stasis were analysed on days 7 and 21. The beta-glucan groups (groups 3 and 4) exhibited lower neutrophil counts on the 3rd day, and macrophage infiltration, fibroblast proliferation, angiogenesis and re-epithelialisation were very high in these groups on the 7th day. In particular, re-epithelialisation on the 21st day was significantly better in the beta-glucan groups. This study demonstrated that beta-glucan may prevent neutrophil-dependent tissue damage and burn-induced oxidative injury through its anti-inflammatory and antioxidant properties. We speculate that the inhibition of neutrophil activation preserves vascular patency by preventing capillary blockage. beta-Glucan is also a powerful macrophage stimulator, and is therefore very effective in saving the zone of stasis. (C) 2012 Elsevier Ltd and ISBI. All rights reserved.
Açıklama
Anahtar Kelimeler
beta-Glucan, Zone of stasis, Burn, Neutrophil, Macrophage, Burn healing
Kaynak
Burns
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
39
Sayı
1
