含有L-氨酸的核心外纳米纤维刺激血管生成和全厚皮肤伤口修复
Nafise Kazemi1, Mohammad Javad Mahalati2, Yeganeh Kaviani3
1Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
International journal of pharmaceutics
|February 22, 2024
概括
这项研究开发了一种新型的核心纳米纤维伤口包裹,使用聚烯胺,,角质素和L-氨酸. 这种先进的材料通过促进血管生成和细胞增殖,在体内显著加速全厚伤口愈合.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 聚合物化学 聚合物化学
背景情况:
- 伤口愈合仍然是一个重大的临床挑战,需要先进的伤口带.
- 天然聚合物为伤口愈合提供治疗效益,包括抗炎和抗菌特性.
- 人工聚合物可以增强伤口带的机械性能.
研究的目的:
- 为了制造和表征一个核心的纳米纤维基伤口包裹.
- 评估开发的伤口剂在促进全厚伤口愈合方面的有效性.
- 研究L-氨酸,和在增强伤口愈合特性中的作用.
主要方法:
- 同轴电被用于制造聚烯胺 (PAAm) 核心纳米纤维,其中含有和的L-氨酸 (L-Arg) 和 (AloKr).
- 分析了包括纤维直径,水容量和拉伸性能在内的物理化学性质.
- 为了评估疗效,使用了体外细胞活力测试 (L929细胞) 和体内全厚伤口愈合模型.
主要成果:
- 核心纳米纤维的PAAm/AloKr/L-Arg表现出最佳的特性,包括纤维直径为93.33±35.11nm和高容量.
- 纳米纤维带表现出优越的机械性能,拉伸强度为2.84 ± 0.27 MPa,弹性模量为62.15 ± 5.32 MPa.
- 该PAAm/(AloKr/L-Arg) 配方显示了最高的L-Arg释放 (87.62±3.02%),增强了L929细胞活力,并在体内显著加快了全厚伤口愈合.
结论:
- 开发的PAAm/(AloKr/L-Arg) 核心外纳米纤维包裹显示出促进全厚伤口愈合的巨大潜力.
- 在核心外结构中的天然聚合物 (,) 和L-氨酸的组合增强了血管生成,新血管化和细胞增殖.
- 这种先进的伤口带为具有挑战性的伤口愈合病例提供了有希望的解决方案.
相关概念视频
Mechanism of Angiogenesis
5.5K
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
5.5K
Phases of Wound Repair
6.0K
Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
6.0K
Clinical Applications of Epidermal Stem Cells
2.7K
Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
2.7K


