抗血管生成对瘢痕疙瘩成纤维细胞增生和凋亡的影响

目的 探讨人工抗血管生成对瘢痕疙瘩成纤维细胞的增生和凋亡的影响,为瘢痕疙瘩的抗血管治疗提供实验依据.方法 手术切除人瘢痕疙瘩1条,将其分成30块,分别种植于裸鼠皮下,其中24块成活,分成3组,应用促血管内皮生长因子(VEGF组)、血管内皮抑制素(Endostar组)和0.9%的氯化钠溶液(对照组)干预瘢痕疙瘩微血管数量...

Influence of anti- angiogenesis therapy on proliferation and apoptosis of fibroblasts derived from keloid

Objective To investigate the influence of anti-angiogenesis therapy on proliferation and apoptosis of fibroblasts derived from keloids. Methods Thirty pieces of keloids from a patient were implanted into subcutaneous tissue of the nude mice, 24 pieces of which survived were divided into three groups which were treated with perilesional injection of vascular endothelial growth factor( VEGF) (0.4 mg/0.2 mL) , Endostar(0.125 g/0.2 mL) and physiological saline (0.2 mL)on the 21 d, 23 d, 25 d, 27 d after implantation. Sample were collected on the 10th day after perilesional injection, the proliferating fibroblasts in keloid tissue were immunohistochemically detected by proliferating cell nuclear antigen (PCNA) expression. The apoptotic cell was detected by terminal deoxynucleotidyl transferase dUTP-nick end labeling (TUNEL) staining. Results IHC staining indicated that PCNA expression of fibroblasts was significantly increased in keloid tissue after VEGF injection, PCNA expression of fibroblasts was significantly reduced in keloid tissue after Endostar injection,TUNEL assay revealed lower apoptotic cells expression in the keloid tissue after VEGF injection and higher in the Endostar group than control group. The rate of proliferative index (PI) , apoptotic index(AI) and AI/PI of fibroblasts in keloid after VEGF (PI:41.13 ±2.29,AI:5.75 ±1.28,AI/PI: 0.14 ± 0.04)or Endostar injection (PI:27.25 ±2.61,AI:11.00±1.31,AI/PI:0.41 ±0.09)and control group (PI: 34.75 ±3.62,AI:7. 88 ± 1.64,AI/PI:0. 23 ±0.07) showed statistical differences. Conclusion Anti-angiogenesis therapy is shown to induce keloid regression through suppression of keloid fibroblast proliferation,induction of apoptosis, which may be a new approach for the treatment of keloids.