病理性瘢痕组织微血管计数和趋化因子表达

目的：探讨病理性瘢痕组织中微血管计数和白细胞介素-8（interleukin-8, IL-8） mRNA，单核细胞趋化蛋白-1（monocyte chemoattractant protein-1,MCP-1） mRNA，巨噬细胞炎性蛋白-1（macrophage inflammatory protein-1,MIP-1）α mRNA的表达意义及相互关系。方法：增生性瘢痕、瘢痕疙瘩、正常皮肤和外科瘢痕标本经10%甲醛固定后常规制作石蜡包埋切片，采用原位杂交法检测IL-8，MCP-1和MIP-1α mRNA的表达。微血管染色采用常规ABC免疫组化法，高倍镜下计数微血管。结果：增生性瘢痕和瘢痕疙瘩微血管计数及IL-8，MCP-1 和MIP-1α mRNA表达阳性率及评分明显高于正常皮肤及外科瘢痕(均P<0.05)；IL-8，MCP-1和MIP-1α mRNA表达阳性病例微血管计数明显高于阴性病例(P<0.05)；微血管计数与IL-8，MCP-1和MIP-1α mRNA表达评分值呈正相关(P<0.05)；病理性瘢痕组织IL-8，MCP-1和MIP-1α mRNA表达评分值之间呈正相关；增生性瘢痕病程小于1年的病例其微血管计数，IL-8，MCP-1和MIP-1α mRNA表达评分值高于病程超过1年的病例。结论：IL-8，MCP-1和MIP-1 α3种趋化因子均有促进病理性瘢痕组织血管生成的作用。

Microvessel counts and the expressions of chemotactic factors in the pathological scar tissues

OBJECTIVE: To explore the microvessel counts and the expressions of interleukin-8 (IL-8), monocyte chemoattractant protein-1 (MCP-1), and macrophage inflammatory protein-1 ( MIP-1) alpha mRNA in the pathological scar tissues. METHODS: Immunohistochemical method of avidin-biotin complex was used for microvessel counts on the routinely formalin-fixed and paraffin-embedded sections of specimens of hypertrophic scars, keloids, normal skin, and surgical scar, and in situ hybridization for the expressions of IL-8, MCP-1, MIP-1alpha mRNA. RESULTS: The microvessel counts as well as the positive rates and the scorings of IL-8, MCP-1, and MIP-1alpha mRNA were significantly higher in pathological scars than those in the normal skin and surgical scar (all P < 0.05). The microvessel counts were significantly higher in the positive cases of IL-8, MCP-1 and MIP-1alpha mRNA than those in the negative ones (P < 0.05). The close positive correlations were found among the microvessel counts and the expressive scorings of 3 factors (P < 0.05). The close positive correlations were also found among the expressive scorings of IL-8, MCP-1, and MIP-1alpha mRNA in pathological scars. Microvessel counts were significantly higher in hypertrophic scars with the course less than 1 year than those with the course more than 1 year. CONCLUSION: IL-8, MCP-1 and MIP-1alpha play important roles in promoting the neovascularization of pathological scars.