瘢痕组织HO-1的表达与血管生成的关系

目的：探讨瘢痕组织HO-1的表达与血管生成的关系，为研究瘢痕形成机制提供理论依据。方法：标本均采集自无严重并发症的志愿者，共24例，分为增生性瘢痕、瘢痕疙瘩、扁平瘢痕3组，每组8例，第4组正常皮肤组织由上述24例患者正常皮肤标本中随机抽取8例。所取标本采用免疫组织化学的方法进行HO-1的表达和CD34血管计数以及成纤维细胞计数，比较不同类型瘢痕及正常皮肤HO-1量化指标、成纤维细胞数量与血管密度之间的关系。结果：CD34染色结果示增生性瘢痕、瘢痕疙瘩血管较丰富，而扁平瘢痕和正常皮肤较少，相比差异有统计学意义（P<0.01）。HO-1在各组瘢痕及正常皮肤表皮中均有不同程度表达，在增生性瘢痕、瘢痕疙瘩中表达较强，与其他组比较差异有统计学意义（P<0.01）。HO-1在增生性瘢痕、瘢痕疙瘩、扁平瘢痕及正常皮肤真皮中表达依次减弱；血管计数与表皮、真皮HO-1（均P<0.01）表达均存在正相关(r=0.761,P<0.01)。成纤维细胞数在增生性瘢痕、瘢痕疙瘩、扁平瘢痕及正常皮肤中依次减少；血管计数与成纤维细胞计数间存在正相关（r=0.731,P<0.01）。结论：HO-1可能是促进瘢痕血管生成的重要因素；烧伤瘢痕内HO-1及血管生成变化的原因可能在局部而不在全身；过量血管生成可能是病理性瘢痕的一种表象。

Relationship between angiogenesis and expression of HO-1 of scar

Objective To investigate the relationshion between the angiogenesis of different kinds of scar and expression of HO-1. Methods The expression of heme oxygenase-1 and vessel counted by CD34 of biopsies from different kinds of scars such as hypertrophic scar, keloid, surgical scar and normal skin of 24 cases was valued by immunochemical method, and the relationship was compared between them. Results The vessel count of hypertrophic scar, keloid was significantly abundant compared with surgical scar or normal skin(P<0.01).While the expression of HO-1 of hypertrophic scar, keloid was obviously higher than that in surgical scar or normal skin(P<0.01),decreased from hypertrophic scar, keloid, surgical scar to normal skin. There existed a positive correlation between vessel count and the expression of HO-1 (r=0.761, P<0.01) as well as the number of fibroblastic cells (r= 0.731, P< 0.01) in the study groups. Conclusion HO-1 might play a important role in the angiogenesis of scar formation. The cause of these changes may be local. Over angiogenesis is one symbol of pathological scar.