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An excellent nanofibrous matrix based on gum tragacanth-poly (Ɛ-caprolactone)-poly (vinyl alcohol) for application in diabetic wound healing
Polymer Degradation and Stability ( IF 6.3 ) Pub Date : 2020-02-19 , DOI: 10.1016/j.polymdegradstab.2020.109105
Marziyeh Ranjbar Mohammadi , Saeid Kargozar , S.H. Bahrami , Shahram Rabbani

In this research, the scaffolds from gum tragacanth (GT), poly (Ɛ-caprolactone) (PCL) and poly (vinyl alcohol) (PVA), were fabricated by electrospinning method for use in the healing of diabetic ulcers. At first, three different compositions from PCL-GT-PVA with blend ratios of (2:1:0.5), (2:1:0.8) and (2:1:1.5) were fabricated and the formulation 2:1:0.8 was selected as proper one. Then, the effect of changing GT concentration on the morphology of nanofibers was checked. For this, two different compositions from PCL-GT- PVA (2:1.5:0.8) and (2:2.2:0.8) were electrospun and their morphology was compared with PCL-GT (2:2.2) structure. The results showed that the ratio of (2:2.2:0.8) with more GT in its structure and the mean diameter of 130 ± 19 nm was appropriate one. Since the PCL-GT (2:2.2) formulation was not capable of forming proper fibers, the PCL-GT (2:1) composition was prepared and used for better comparison of PCL-GT-PVA and PCL-GT specimens in subsequent tests. PCL-GT-PVA nanofibers exhibited tensile strength and young modulus about 2.7 and 56 MPa, respectively. Mesenchymal stem cells on the scaffolds demonstrated attachment and proliferation of cells. Histological analyses of substrates containing stem cells into rats with diabetic ulcers exhibited tissue repair and regeneration including re-epithelization and collagen formation after 15 days. We conclude that the fabricated nanofibers with excellent mechanical and biological characteristics are promising scaffolds in wound healing of diabetic ulcers.



中文翻译:

基于黄aga胶-聚己内酯-聚乙烯醇的优异纳米纤维基质,可用于糖尿病伤口的愈合

在这项研究中,由黄gum胶(GT),聚(ε-己内酯)(PCL)和聚(乙烯醇)(PVA)制成的支架是通过电纺丝方法制备的,用于糖尿病性溃疡的愈合。首先,制备三种不同的PCL-GT-PVA组合物,其混合比为(2:1:0.5),(2:1:0.8)和(2:1:1.5),配方为2:1:0.8被选为合适的。然后,检查了改变GT浓度对纳米纤维形态的影响。为此,对来自PCL-GT-PVA(2:1.5:0.8)和(2:2.2:0.8)的两种不同成分进行电纺,并将其形态与PCL-GT(2:2.2)结构进行比较。结果表明,结构中GT较多的比例为(2:2.2:0.8),平均直径为130±19 nm是合适的。由于PCL-GT(2:2.2)配方无法形成合适的纤维,制备PCL-GT(2:1)组合物,并在后续测试中用于更好地比较PCL-GT-PVA和PCL-GT标本。PCL-GT-PVA纳米纤维分别显示出约2.7和56 MPa的拉伸强度和杨氏模量。支架上的间充质干细胞表现出细胞的附着和增殖。对患有糖尿病溃疡的大鼠的含有干细胞的底物的组织学分析显示,组织修复和再生包括15天后的上皮再生和胶原形成。我们得出的结论是,具有优异的机械和生物学特性的纳米纤维是糖尿病溃疡伤口愈合的有前途的支架。PCL-GT-PVA纳米纤维分别显示出约2.7和56 MPa的拉伸强度和杨氏模量。支架上的间充质干细胞表现出细胞的附着和增殖。对患有糖尿病溃疡的大鼠的含有干细胞的底物的组织学分析显示,组织修复和再生包括15天后的上皮再生和胶原形成。我们得出的结论是,具有优异的机械和生物学特性的纳米纤维是糖尿病溃疡伤口愈合的有前途的支架。PCL-GT-PVA纳米纤维分别显示出约2.7和56 MPa的拉伸强度和杨氏模量。支架上的间充质干细胞表现出细胞的附着和增殖。对患有糖尿病溃疡的大鼠的含有干细胞的底物的组织学分析显示,组织修复和再生包括15天后的上皮再生和胶原形成。我们得出的结论是,具有优异的机械和生物学特性的纳米纤维是糖尿病溃疡伤口愈合的有前途的支架。对患有糖尿病溃疡的大鼠的含有干细胞的底物的组织学分析显示,组织修复和再生包括15天后的上皮再生和胶原形成。我们得出的结论是,具有优异的机械和生物学特性的纳米纤维是糖尿病溃疡伤口愈合的有前途的支架。对患有糖尿病溃疡的大鼠的含有干细胞的底物的组织学分析显示,组织修复和再生包括15天后的上皮再生和胶原形成。我们得出的结论是,具有优异的机械和生物学特性的纳米纤维是糖尿病溃疡伤口愈合的有前途的支架。

更新日期:2020-02-20
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