摘要
背景:跟腱损伤术后跟腱粘连会导致跟腱的生物力学性能下降、愈合能力减弱及超微结构改变,进而影响到患者的日常生活和工作能力,因此,如何有效处理和预防跟腱粘连已成为临床治疗的热点和难点问题。目的:分析生物羊膜对跟腱断裂大鼠术后跟腱粘连、生物力学及超微结构的影响。方法:取60只6周龄SD大鼠建立双侧后肢跟腱断裂模型,采用随机数字表法分2组干预:模型组直接缝合肌腱断端,羊膜组将生物羊膜包裹于断裂吻合口周围后缝合固定,每组30只。术后1,2,4周,评估跟腱粘连、生物力学、组织形态与结构及p38、ERK1/2蛋白表达。结果与结论:①术后1周,两组大鼠跟腱及腱周组织轻度水肿,其中模型组跟腱组织粘连较明显;干预后2周,模型组大鼠跟腱及腱周组织仍有水肿,跟腱与周围组织粘连程度重于羊膜组;术后4周,两组大鼠跟腱周围均无水肿,愈合良好,羊膜组跟腱粘连程度轻于模型组。羊膜组大鼠术后2,4周的跟腱最大拉力大于模型组(P<0.001)。②苏木精-伊红染色与透射电镜观察显示,术后1周,两组大鼠跟腱肌腱结构紊乱,胶原纤维排列稀疏,其中模型组可见明显的炎性反应与跟腱粘连;术后2周,模型组仍可见明显的炎性反应、跟腱粘连,胶原纤维无规则排序,羊膜组大鼠胶原纤维排列整齐、成纤维细胞内质网扩张;术后4周,模型组大鼠跟腱胶原纤维组织增厚、排列紊乱,成纤维细胞内粗面内质网较少,羊膜组胶原纤维排列有序且较薄,成纤维细胞内含大量粗面内质网。③术后4周的蛋白免疫印迹检测显示,羊膜组大鼠跟腱组织中p38及ERK1/2蛋白表达均低于模型组(P<0.05)。④结果表明,生物羊膜可促进断裂跟腱术后的愈合、抑制跟腱粘连,该作用可能与调控MAPK/ERK信号通路有关。
BACKGROUND:Achilles tendon adhesion after Achilles tendon injury can lead to decreased biomechanical properties,weakened healing ability,and ultrastructural changes of Achilles tendon,which further affects patients’daily life and work ability.Therefore,how to effectively deal with and prevent Achilles tendon adhesion has become a hot and difficult problem in clinical treatment.OBJECTIVE:To analyze the effects of biological amniotic membranes on postoperative Achilles tendon adhesion,biomechanics,and ultrastructural changes in rats with Achilles tendon rupture.METHODS:Sixty 6-week-old SD rats were selected to establish bilateral Achilles tendon rupture models and divided into two groups(n=30 per group)by the random number table method.In the model group,the severed end of the tendon was sutured directly.In the amniotic membrane group,the biological amniotic membrane was wrapped around the broken anastomosis and fixed by a suture.The adhesion,biomechanics,morphology,and structure of the Achilles tendon and the expression of p38 and ERK1/2 protein were evaluated 1,2,and 4 weeks after surgery.RESULTS AND CONCLUSION:(1)1 week after operation,the Achilles tendon and peritendinous tissues of the two groups were mildly edema,and the adhesion of the Achilles tendon tissues in the model group was more obvious.2 weeks after the intervention,the Achilles tendon and peritendinous tissues of the model group still had edema,and the adhesion degree between the Achilles tendon and the surrounding tissues was heavier than that of the amniotic membrane group.4 weeks after operation,there was no edema around the Achilles tendon in both groups,and the healing was well.The adhesion degree of the Achilles tendon in the amniotic membrane group was less than that in the model group.The maximum tension of Achilles tendons in the amniotic membrane group was higher than that in the model group at 2 and 4 weeks after operation(P<0.001).(2)Hematoxylin-eosin staining and transmission electron microscopy revealed that 1 week after operation,the tendon structure of rats of the two groups was disordered and the collagen fibers were sparsely arranged,in which the model group demonstrated obvious inflammatory reaction and adhesion to the Achilles tendon.Two weeks after operation,the model group still demonstrated obvious inflammatory response,adhesion of Achilles tendon,and irregular ordering of collagen fibers.The amniotic membrane group exhibited an orderly arrangement of collagen fibers and expansion of the endoplasmic reticulum of fibroblasts.At 4 weeks after operation,the collagen fibers of the Achilles tendon in the model group were thickened and disordered,and the rough endoplasmic reticulum was less in the fibroblasts,while the collagen fibers in the amniotic membrane group were ordered and thin,and the fibroblasts contained a large number of rough endoplasmic reticulum.(3)Four weeks after operation,western blot assay exhibited that the expressions of p38 and ERK1/2 protein in the Achilles tendon tissue of rats in the amniotic membrane group were lower than those in the model group(P<0.05).(4)The results confirm that the biologic amniotic membrane can promote the healing and inhibit the adhesion of Achilles tendon after the operation of the ruptured Achilles tendon,which may be associated with the regulation of the MAPK/ERK signaling pathway.
作者
杨晓光
时艳程
马韬
张继敏
张伟
Yang Xiaoguang;Shi Yancheng;Ma Tao;Zhang Jimin;Zhang Wei(Second Hospital of Zhangjiakou,Zhangjiakou 075000,Hebei Province,China;Third Hospital of Hebei Medical University,Shijiazhuang 050000,Hebei Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2024年第15期2297-2301,共5页
Chinese Journal of Tissue Engineering Research
基金
河北省医学科学研究课题计划项目(20200986),项目负责人:张伟
张家口市重点研发计划项目(2021121D),项目负责人:杨晓光。
关键词
生物羊膜
MAPK
ERK
跟腱粘连
生物力学
超微结构变化
biological amniotic membrane
MAPK
ERK
Achilles tendon adhesion
biomechanics
ultrastructural change