目的:将脐带华通胶间充质干细胞(WJMSCs)移植到子宫切口瘢痕缺陷(PCSD)模型大鼠体内,探讨其治疗效果。方法:取雌性SD大鼠50只、将其随机分为3组:正常手术组(N-O组)10只、模型对照组(M-C组)20只和模型治疗组(M-T组)20只。孕第19天N-O组剖宫取胎后连续缝合子宫切口;M-C组与M-T组剖宫产术后子宫肌壁注射脂多糖(LPS)联合电凝(功率为10 W)子宫切缘,间断缝合切口。M-T组分A、B亚组(各10只),A组静脉注射0.5 m L+阴道灌注0.5 m L(1×10~9/L)WJMSCs,B组阴道灌注1 m L同浓度WJMSCs,每周1次,共3次;M-C亦分A、B亚组(各10只),与M-T组同样方法处理,仅将生理盐水替代WJMSCs。各组治疗后第1和4周,分别处死6和4只,留双侧子宫进行HE染色、Masson染色、肌动蛋白(actin)和细胞角蛋白免疫组化染色,通过体视学分析,检测子宫肌层和内膜的修复情况。结果:WJMSCs治疗后第1和4周,M-C组子宫肌层厚度和actin体积密度(Vv)均显著低于N-O组,肌层胶原纤维Vv和内膜缺陷率高于N-O组(P0.05);WJMSCs治疗后第1和4周,M-T的A和B组的肌层厚度和actin Vv均显著高于M-C组,肌层胶原纤维Vv低于M-C组;M-C组内膜缺陷率高于其它组(P0.05)。结论:WJMSCs可促进PCSD大鼠子宫肌层结构和功能的修复。静脉+局部联合治疗和单纯阴道治疗效果无明显差别。 相似文献
Detecting low-density foreign bodies within soft tissues still stands for a serious challenge. Grating-based multimodal X-ray imaging typically has low hardware requirements while simultaneously providing three kinds of imaging information, i.e., absorption, phase-contrast, and dark-field. We aimed to explore the capacity of grating-based multimodal X-ray imaging technology for detecting common foreign bodies within subcutaneous tissues, and to assess the advantages as well as disadvantages of the three kinds of images obtained via grating-based X-ray multimodal technology in relation to diverse kinds of foreign bodies within different tissues. In this study, metal, glass, wood, plastic, graphite, and ceramic foreign bodies were injected into chunks of the pig adipose tissue and chicken thigh muscles. Next, a grating-based multimodal X-ray imaging device developed in our laboratory was used to detect the above foreign bodies within the adipose and muscle tissues. Our results show that grating-based multimodal X-ray imaging clearly revealed the subcutaneous foreign bodies within the adipose and muscle tissues by acquiring complementary absorption, phase-contrast, and dark-field imaging data in a single shot. Grating-based multimodal X-ray imaging has an exciting potential to detect foreign bodies underneath the epidermis.