免疫炎症反应和内皮祖细胞在肉鸡肺血管丛样病变形成中的作用(英文)
发布时间:2023-05-18 01:25
目的:肺血管丛样病变是重度肺动脉高压(PAH)病人的特征病变,病变血管周围常伴有单个核细胞浸润。肺血管丛样病变在常用实验动物上难以复制,但可在肉鸡(一种生长快速的肉用型鸡)肺脏中自发形成。内皮祖细胞(EPCs)在组织再生和血管修复过程中发挥重要作用。本研究以肉鸡为模型,探讨EPCs与肺血管丛样病变形成之间的关系。创新点:证实EPCs参与了肺血管丛样病变的形成过程,并揭示了导致EPCs功能障碍的免疫学机制。方法:采集14周龄肉鸡肺组织,常规石蜡切片,观察肺血管丛样病变的形成情况;采用免疫组化法检测EPCs表面标志CD133和VEGFR-2的表达以及肝细胞生长因子(HGF)的表达;分离培养晚期EPCs,建立EPCs/淋巴细胞共培养体系,并在共培养体系中添加20 ng/ml HGF,观察EPCs增殖、凋亡和体外管样结构形成的变化。结论:在不同周龄的肉鸡肺组织中均可观察到处于不同发展阶段的肺血管丛样病变(图1)。早期的丛样病变主要由EPCs(CD133+和VEGFR-2+细胞)构成,HGF在病变实体中高表达(图2)。淋巴细胞共培...
【文章页数】:11 页
【文章目录】:
1 Introduction
2 Materials and methods
2.1 Lung tissue preparation
2.2 Histological and immunohistochemical staining
2.3 Ex vivo expansion of EPCs from peripheral blood
2.4 EPC/lymphocyte co-culture system
2.5 Methyl thiazolyl tetrazolium assay
2.6 Flow cytometric analysis of cell apoptosis
2.7 Tubular formation assay
2.8 Statistical analyses
3 Results
3.1 Histological findings
3.2 Expressions of CD133,VEGFR-2,and HGF in PLs
3.3 Characterization of cultured EPCs
3.4 Effect of lymphocyte challenge on EPC func-tion in the presence or absence of HGF
4 Discussion
5 Conclusions
Compliance with ethics guidelines
本文编号:3818396
【文章页数】:11 页
【文章目录】:
1 Introduction
2 Materials and methods
2.1 Lung tissue preparation
2.2 Histological and immunohistochemical staining
2.3 Ex vivo expansion of EPCs from peripheral blood
2.4 EPC/lymphocyte co-culture system
2.5 Methyl thiazolyl tetrazolium assay
2.6 Flow cytometric analysis of cell apoptosis
2.7 Tubular formation assay
2.8 Statistical analyses
3 Results
3.1 Histological findings
3.2 Expressions of CD133,VEGFR-2,and HGF in PLs
3.3 Characterization of cultured EPCs
3.4 Effect of lymphocyte challenge on EPC func-tion in the presence or absence of HGF
4 Discussion
5 Conclusions
Compliance with ethics guidelines
本文编号:3818396
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