石榴皮多酚软膏通过介导TGF-β/Smad信号通路以抗痤疮瘢痕形成的机制研究
2019-08-13杨逸璇朱明芳王峰朱亚梦黄晓婵杨婉婷
杨逸璇 朱明芳 王峰 朱亚梦 黄晓婵 杨婉婷


〔摘要〕 目的 探讨不同浓度的石榴皮多酚软膏抗增生性痤疮瘢痕形成的机制。方法 SD大鼠36只,于烫伤造模成功后,随机分为模型组,阴性对照组及石榴皮软膏低剂量组、中剂量组、高剂量组、超高剂量组6组,每组6只。模型组给予生理盐水湿敷,阴性对照组涂1 mL基质,石榴皮软膏组按低、中、高、超高剂量组每日分别给予1 mL的相应浓度的石榴皮多酚软膏1次。自造模日起观察创面情况,并于造模后第7、14、21天分别取各组大鼠创面皮肤进行病理组织学检测及免疫组化检测TGF-β1、Smad4水平。结果 石榴皮多酚软膏中剂量组能降低TGF-β1、Smad4表达(P<0.05),抑制瘢痕形成。结论 石榴皮多酚软膏可以通过调控TGF-β/Smad信号通路抗增生性痤疮瘢痕的形成。
〔关键词〕 痤疮瘢痕;增生性瘢痕;TGF-β/Smad信号通路;石榴皮多酚
〔中图分类号〕R285.5 〔文献标志码〕A 〔文章编号〕doi:10.3969/j.issn.1674-070X.2019.05.007
〔Abstract〕 Objective To investigate the mechanism of different concentrations of pomegranate peel polyphenol ointment in preventing hypertrophic acne scar formation. Methods After successful scald molding, 36 SD rats were randomly divided into a model group, a negative control group, a low dose, a medium dose, a high dose of pomegranate peel ointment group, with 6 rats in each group. The model group was given normal saline wet compress, and the negative control group was coated with 1 mL matrix, and the pomegranate peel ointment group was given 1 mL pomegranate peel polyphenol ointment of the corresponding concentration in the low, medium, high and ultra-high dose groups respectively. The wound condition was observed from the day of model establishment, and the wound skin of rats in each group was taken on the 7th, 14th and 21st day after model establishment for histopathological examination and immunohistochemical detection of transforming growth factor-β1 (TGF-β1) and Smad4 levels. Results The middle dose group of pomegranate peel polyphenol ointment could decrease the expression of TGF-β1 and Smad4 (P<0.05), and inhibit the formation of scar. Conclusion Pomegranate peel polyphenol ointment may inhibit the formation of acne scars by regulating TGF-β/Smad signaling pathway.
〔Keywords〕 acne scar; hypertrophic scar; TGF-β/Smad signaling pathway; pomegranate peel polyphenol
痤疮(Acne)是一种常见的涉及毛囊皮脂腺的慢性炎症性皮肤病[1]。好发于青春期男女,其临床表现包括粉刺、炎性丘疹、脓疱、结节和囊肿。约95%的痤疮患者会出现不同程度的痤疮瘢痕,给患者造成严重的心理负担,从而影响其生活质量[2-3]。痤疮瘢痕属于病理性瘢痕,可表现为萎缩性瘢痕、增生性瘢痕(hypertrophic scar, HS)和瘢痕疙瘩(ke-loid, K)[4]。有研究证实,TGF-β/Smad通路在增生性瘢痕的形成过程中具有重要作用。本实验以增生性痤疮瘢痕为主要研究对象,因现阶段尚未有明确的痤疮瘢痕造模方法,故选择大鼠背部烫伤模型为代表进行研究。
石榴皮多酚是石榴皮的主要有效成分,具有抗氧化、抑菌、降脂、抗炎、抗过敏、促进皮肤愈合等多重作用[5-7]。基于此,本研……
