人β防御素2对大鼠急性鼻-鼻窦炎的抗炎防御作用研究

目的 对人β防御素2 (human beta defensin,hβD-2)在大鼠急性鼻-鼻窦炎中的抗炎防御功能进行研究,以期为其预防和治疗提供新的方向和方法.方法 构建SD大鼠急性鼻-鼻窦炎模型,实验组分别于建模前、建模后鼻腔内滴入重组hβD-2质粒混悬液,对照组滴入空质粒混悬液,处死后取鼻黏膜,免疫组化验证hβD-2的转染结果及表达水平,HE染色比较其病理学差异,收集鼻腔灌洗液,对比其菌落数差异.结果 免疫组化表明重组hβD-2质粒转染后大鼠鼻黏膜可有效表达hβD,且主要表达于黏膜上皮和腺体,HE染色结果表明实验组鼻黏膜的炎症反应较对照组明显减轻,实验组鼻腔灌洗液细菌培养示金黄色葡萄球菌菌落明显减少,对照组无明显变化.结论 重组hβD-2质粒转染大鼠鼻黏膜后能有效表达,且能在体内发挥其抗微生物作用,增强急性鼻-鼻窦炎大鼠鼻黏膜的抗炎防御能力,有望为急性鼻-鼻窦炎的预防和治疗提供新的方法.

Study of anti-inflammatory function of human bea defensin 2 on rats' acute rhinosinusitis

OBJECTIVE To study the antiinflammatory function of human beta defensin 2(hβD-2) on acute rhinosinusitis in rats,in order to provide a new therapy for acute rhinosinusitis.METHODS Acute rhinosinusitis model were established on SD rats before and after the transfection of plasmid,the rats in experimental group were dropped with recombinant hβD-2 plasmid mixture in nose,while with empty plasmid mixture in control group.Immunohistochemistry method was used to prove the transfection results,nasal mucosa were hematoxylineosin stained to compare the pathological difference of nasal mucosa,nasal lavage fliud was collected and cultured to compare the colony number of the bacteria.RESULTS The expression of hβD-2 was confirmed by immunohistochemistry method,which mainly distributed in mucosal epithelium and gland,pathological results showed that the inflammation of nasal mucosa in experimental group was significantly relieved than that in control group.The number of Staphylococcus auresus colony number was significantly decreased in experimental group,while there was no significantly change in the control group.CONCLUSION Recombinant hβD-2 plasmid can be successfully transfected into the nasal mucosa of rats and expressed effectively.The anti-inflammatory ability of nasal mucosa was increased after the transfection,which is expected to provide a new treatment approach for acute rhinosinusitis.