Background:The role of autophagy in the formation of hypertrophic scars(HS)remains unclear.This study aimed to explore the role and potential mechanism of autophagy during the development of HS.Methods:RNA and protein...Background:The role of autophagy in the formation of hypertrophic scars(HS)remains unclear.This study aimed to explore the role and potential mechanism of autophagy during the development of HS.Methods:RNA and protein expression levels of Beclin-1,p62,and LC3II in normal skin tissues and HS specimens from different patients were examined.Autophagy inducers and inhibitors were used to cure established HS in rabbit ears,and the expression of Beclin-1,p62,and LC3II at the RNA and protein level was determined.Lastly,the effects of autophagy inducers and inhibitors on HS development were analyzed.Results:Compared to normal skin tissues,the expression of LC3II and Beclin-1 was higher(P<0.05),while that of p62 was lower(P<0.05)in HS tissues.In addition,the LC3II/LC3I ratio was increased during HS formation,and the altered expression of the three proteins stabilized after one year.Administration of autophagy inducers enhanced the formation of HS as well as the expression levels of LC3II and Beclin-1 but decreased p62 expression.Meanwhile,administration of autophagy inhibitors increased the expression of LC3II,Beclin-1,and p62,along with reduced HS formation.Conclusion:Autophagic activity increased during HS initiation and subsequent stabilization.In addition,autophagy inhibitors were able to inhibit HS formation by suppressing autophagy,whereas autophagy inducers promoted scar hyperplasia by enhancing autophagy。展开更多
目的:他克莫司是临床广泛应用的一种药物,其对增生性瘢痕是否产生作用并无相关报道,为此提出并证实了他克莫司可以抑制兔耳瘢痕增生。方法:建立兔耳增生性瘢痕模型,选10只新西兰大耳白兔双耳腹侧用打孔器制作直径1cm圆形创面,伤后14天...目的:他克莫司是临床广泛应用的一种药物,其对增生性瘢痕是否产生作用并无相关报道,为此提出并证实了他克莫司可以抑制兔耳瘢痕增生。方法:建立兔耳增生性瘢痕模型,选10只新西兰大耳白兔双耳腹侧用打孔器制作直径1cm圆形创面,伤后14天创面上皮化后给药,每只兔左耳为空白对照组涂等剂量凡士林软膏,右耳为他克莫司治疗组。分别在伤后14天、21天2、8天3、5天和49天采集标本,行HE染色,观察形态学差异;Real-t i me PCR检测纤维化相关因子TGF-β1、TGF-β2、Col l agen-α1等的表达。结果:HE染色可见他克莫司组成纤维细胞数量及胶原纤维较对照组明显减少,PCR结果可见TGF-β1、TGF-β2及Col l agen-α1表达较对照组在各时间点均减少。结论:实验组较对照组瘢痕明显减轻,证明他克莫司显著抑制兔耳瘢痕增生,可作为临床上治疗及预防瘢痕增生的全新疗法。展开更多
基金the National Natural Science Foundation of China(grant no.81872219)Science and Technology Project of Hunan Provincial Health Commission(grant no.B2015-040)+2 种基金Major Scientific and Technological Projects in Hunan Province(grant no.2019SK1010)2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant(grant nos.2020LKSFG18B,2020LKSFG02E)Guangdong University Innovation Team Project(grant no.2021KCXTD047).
文摘Background:The role of autophagy in the formation of hypertrophic scars(HS)remains unclear.This study aimed to explore the role and potential mechanism of autophagy during the development of HS.Methods:RNA and protein expression levels of Beclin-1,p62,and LC3II in normal skin tissues and HS specimens from different patients were examined.Autophagy inducers and inhibitors were used to cure established HS in rabbit ears,and the expression of Beclin-1,p62,and LC3II at the RNA and protein level was determined.Lastly,the effects of autophagy inducers and inhibitors on HS development were analyzed.Results:Compared to normal skin tissues,the expression of LC3II and Beclin-1 was higher(P<0.05),while that of p62 was lower(P<0.05)in HS tissues.In addition,the LC3II/LC3I ratio was increased during HS formation,and the altered expression of the three proteins stabilized after one year.Administration of autophagy inducers enhanced the formation of HS as well as the expression levels of LC3II and Beclin-1 but decreased p62 expression.Meanwhile,administration of autophagy inhibitors increased the expression of LC3II,Beclin-1,and p62,along with reduced HS formation.Conclusion:Autophagic activity increased during HS initiation and subsequent stabilization.In addition,autophagy inhibitors were able to inhibit HS formation by suppressing autophagy,whereas autophagy inducers promoted scar hyperplasia by enhancing autophagy。
文摘目的:他克莫司是临床广泛应用的一种药物,其对增生性瘢痕是否产生作用并无相关报道,为此提出并证实了他克莫司可以抑制兔耳瘢痕增生。方法:建立兔耳增生性瘢痕模型,选10只新西兰大耳白兔双耳腹侧用打孔器制作直径1cm圆形创面,伤后14天创面上皮化后给药,每只兔左耳为空白对照组涂等剂量凡士林软膏,右耳为他克莫司治疗组。分别在伤后14天、21天2、8天3、5天和49天采集标本,行HE染色,观察形态学差异;Real-t i me PCR检测纤维化相关因子TGF-β1、TGF-β2、Col l agen-α1等的表达。结果:HE染色可见他克莫司组成纤维细胞数量及胶原纤维较对照组明显减少,PCR结果可见TGF-β1、TGF-β2及Col l agen-α1表达较对照组在各时间点均减少。结论:实验组较对照组瘢痕明显减轻,证明他克莫司显著抑制兔耳瘢痕增生,可作为临床上治疗及预防瘢痕增生的全新疗法。
