Jin等人对大鼠背部烧伤进行治疗。在烧伤的早期治疗中,壳聚糖和肝素分别应用在大鼠背部烧伤创面上,72小时后组织学检查显示,壳聚糖组烧伤创面严重程度明显比肝素组要低。在烧伤的早期阶段,壳聚糖能够很好地阻止烧伤创面的扩展,而肝素在早期阻止烧伤创面扩展上没有效果。肝素和壳聚糖联合应用会减弱壳聚糖的保护效应,在烧伤早期治疗过程中,建议壳聚糖和肝素不要联合应用。
Alsarra调查了不同分子量的壳聚糖对大鼠烧伤的治疗效果,研究发现,高分子量的壳聚糖治疗烧伤创面的效果最好。高分子量壳聚糖治疗组发现创面出现更多的上皮组织,其上皮化最好,创面闭合最快。组织学检查和胶原酶活性检查显示高分子量壳聚糖治疗组创面新生肉芽组织形成、上皮细胞形成提早出现。
Nascimento等人使用壳聚糖凝胶联合1%的磺胺嘧啶银联合治疗大鼠烧伤,壳聚糖每48小时应用于烧伤创面一次,1%的磺胺嘧啶银每24小时应用于烧伤创面一次。与单用壳聚糖、磺胺嘧啶银治疗组比较,壳聚糖和磺胺嘧啶银联合应用组成纤维细胞增殖更快,新生血管更多。
Ribeiro等人对壳聚糖凝胶治疗烧伤创面进行了大鼠动物实验研究。早期的体外研究显示,壳聚糖能够促进细胞黏附和增殖,细胞生存能力检查显示壳聚糖及其降解产物是无毒的。肉眼观察,壳聚糖治疗组烧伤创面要明显小于对照组。
另外还有相似的研究,应用壳聚糖凝胶对狗的皮肤全层烧伤进行治疗。研究结果显示狗对壳聚糖的耐受性好,壳聚糖能够很好的促进组织再生。研究发现,壳聚糖能够诱发炎性因子迁移,血管生成因子活性增加。第22天,创面组织发现Ⅰ型、Ⅳ型胶原形成,并且发现表皮、真皮连接形成。第100天,新生组织与原有组织极为相似。
资料文献
Chitosan gel with 1% silver sulfadiazine | Burn | Rat | Higher fibroblast production and a better |
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| angiogenesis; the presence of silver |
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| sulfadiazine in the chitosan gel does not |
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| seem to contribute to the epithelialization |
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| process |
Chitosan | Burn | Rat | Burns treated with high-molecular-weight |
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| chitosan had significantly more epithelial |
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| tissue, the best re-epithelialization and the |
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| fastest wound closure; advanced granulation |
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| tissue formation and epithelialization in |
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| wounds |
Chitosan powder | Burn | Rat | The burn degree of the chitosan-treated |
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| group was less severe than the control group, |
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| and chitosan greatly prevented the extension |
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| of burns in early phase |
Chitosan hydrogel | Burn | Rat | Promotes cell adhesion and proliferation; |
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| noncytotoxic; smaller wound bed; lack of a |
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| reactive or a granulomatous inflammatory |
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| reaction in skin lesions; and the absence of |
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| pathological abnormalities in the organs |
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| obtained by necropsy |
Bilayered chitosan hydrogel | Burn | Dog | Well tolerated and promoted a good tissue |
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| regeneration; induced inflammatory cell |
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| migration and angiogenic activity |