thymosin-beta(4) and Burns

With the aging of population and the development of social economy, the incidence of chronic wounds is increasing day by day, while the incidence of burns and trauma remains at a high level, making wound repair an increasingly concerned area in clinical practice. Thymosin β4 is a naturally occurring small molecule protein in vivo, which is widely distributed in a variety of body fluids and cells, especially in platelets. Thymosin β4 has biological activities of promoting angiogenesis, anti-inflammation, anti-apoptosis, and anti-fibrosis, and has many important functions in wound repair. Thymosin β4 has been observed to promote the healing of various wounds, such as burns, diabetic ulcers, pressure ulcers. This paper will review the molecular structure, mechanism of wound healing promotion, pharmacokinetics, and clinical application of thymosin β4, aiming to introduce its potential in wound treatment and the shortcomings of current researches.. 随着人口老龄化和社会经济的发展，慢性创面发病率日益增高，同时烧创伤发病率仍处于较高水平，使得创面修复成为临床日益关注的领域。胸腺素β4是一种体内天然存在的小分子蛋白，其广泛分布于多种体液和细胞内，尤其是血小板中。胸腺素β4具有促进血管生成、抗炎、抗凋亡及抗纤维化的生物活性，在创面修复方面有许多重要的功能。目前已经在烧伤、糖尿病溃疡、压疮等多种创面中观察到胸腺素β4具有促进愈合的作用。该文将从胸腺素β4的分子结构、促创面愈合作用机制、药代动力学及临床应用方面进行综述，旨在介绍该因子在创面治疗中的潜力和当前研究的不足之处。.

Topics: Burns; Humans; Pressure Ulcer; Thymosin; Wound Healing

No agent has been identified that significantly accelerates the repair of chronic dermal wounds in humans. Thymosin beta 4 (Tβ4) is a small, abundant, naturally occurring regenerative protein that is found in body fluids and inside cells. It was found to have angiogenic and antiinflammatory activity and to be high in platelets that aggregate at the wound site. Thus we used Tβ4 initially in dermal healing. It has since been shown to have many activities important in tissue protection, repair, and regeneration. Tβ4 increases the rate of dermal healing in various preclinical animal models, including diabetic and aged animals, and is active for burns as well. Tβ4 also accelerated the rate of repair in phase 2 trials with patients having pressure ulcers, stasis ulcers, and epidermolysis bullosa wounds. It is safe and well tolerated and will likely have additional uses in the skin and in injured organs for tissue repair and regeneration.

Topics: Animals; Burns; Catalytic Domain; Clinical Trials, Phase I as Topic; Clinical Trials, Phase II as Topic; Humans; Receptors, Immunologic; Skin; Thymosin; Wound Healing

The aim of this study was to investigate the effects of thymosin

Topics: Animals; Apoptosis; Burns; Humans; Lactates; Myocardium; Rats; Rats, Sprague-Dawley; Ringer's Solution; STAT1 Transcription Factor; STAT3 Transcription Factor; Thymosin

Rapid vascular remodelling of damaged dermal tissue is required to heal burn wounds. Thymosin β4 (Tβ4) is a growth factor that has been shown to promote angiogenesis and dermal wound repair. However, the underlying mechanisms based on Tβ4 function have not yet been fully investigated. In the present study, we investigated how Tβ4 improves dermal burn wound healing via actin cytoskeletal remodelling and the action of heat-shock proteins (HSPs), which are a vital set of chaperone proteins that respond to heat shock. Our in vitro results achieved with the use of human umbilical vein endothelial cells (HUVECs) revealed a possible signal between Tβ4 and HSP70. Moreover, we confirmed that remodelling of filamentous actin (F-actin) was regulated by Tβ4-induced HSP70 in HUVECs. Based on these in vitro results, we confirmed the healing effects of Tβ4 in an adapted dermal burn wound in vivo model. Tβ4 improved wound-healing markers, such as wound closure and vascularization. Moreover, Tβ4 maintained the long-term expression of HSP70, which is associated with F-actin regulation during the wound-healing period. These results suggest that an association between Tβ4 and HSP70 is responsible for the healing of burn wounds, and that this association may regulate F-actin remodelling. Copyright © 2015 John Wiley & Sons, Ltd.

Topics: Actin Cytoskeleton; Animals; Biomarkers; Burns; Cell Survival; Dermis; Disease Models, Animal; HSP70 Heat-Shock Proteins; Human Umbilical Vein Endothelial Cells; Humans; Mice, Inbred C57BL; Models, Biological; Neovascularization, Physiologic; Phosphatidylinositol 3-Kinases; Phosphorylation; Proto-Oncogene Proteins c-akt; Signal Transduction; Thymosin; Vascular Endothelial Growth Factor A; Wound Healing