增生性瘢痕组织中成纤维细胞活性功能研究

STUDY ON THE ACTIVITY OF FIBROBLAST IN HYPERTROPHIC SCAR

为全面系统了解瘢痕增生过程中成纤维细胞的活性功能状况，实验通过４０例不同时期的瘢痕增生组织进行成纤维细胞核内增殖抗原（ＰＣＮＡ）、核仁组成区嗜银蛋白（ＡｇＮＯＲｓ）和氨基酸分析检测。结果发现：ＰＣＮＡ的蛋白表达主要在１和３个月时期的瘢痕成纤维细胞核内，细胞内ＡｇＮＯＲｓ在１个月～９个月瘢痕增生组织中明显高于１２个月以后的瘢痕组织及正常皮肤内水平；组织总氨基酸量随瘢痕增生发展逐渐递增，但以瘢痕增生１个月时期为最快（２０６．７４μｇ／ｍｇ组织），代表胶原含量的羟脯氨酸则在瘢痕发展３个月～６个月之间提高最快（１７．０５μｇ／ｍｇ组织），６个月～９个月之间下降为５．１１μｇ／ｍｇ组织，９个月～１２个月为１．３１μｇ／ｍｇ组织。由此提示：在瘢痕发展整个过程中，成纤维细胞的增殖旺盛阶段在瘢痕形成早期，胶原蛋白沉积在６个月时期左右也基本完成，但其它细胞外间质如胶原蛋白，蛋白多糖纤维结合蛋白等在１２个月以后的瘢痕组织中仍有聚集。

To determine the state of fibroblast during the process of development of hypertrophic scar (HS), 40 specimens of HS in different periods were collected. The expressions of prolifrating cell nuclear antigen (PCNA) and Ag-protein in nucleolar organizer regions (Ag NORs) as well as the content of total amino acids in the tissues were examined. The hypertrophic scar of 1st and 3rd month old, the expression of PCND and Ag NORs were the highest. In the 9th and 12th month old, althrough PCNA was nearly negative, but the expression of Ag NORs was low. The content of total amino acid was increased gradually as HS developed but the increase of amount of hydroxyproline was markedly slowed down in 9 month old HS. It was suggested that: (1) in the developing process of HS the proecess of overproliferation of fibroblasts was short and limitted in 1-3 months period in the process of wound lealing; (2) the synthesis of collagen was nearly stopped at 6 months, but that of other extracellular matrix such as fibronectin and proteoglycan might be continued to aggregate after 12 months.