免疫炎癥反應(yīng)和內(nèi)皮祖細(xì)胞在肉雞肺血管叢樣病變形成中的作用(英文)
發(fā)布時(shí)間:2023-05-18 01:25
目的:肺血管叢樣病變是重度肺動(dòng)脈高壓(PAH)病人的特征病變,病變血管周圍常伴有單個(gè)核細(xì)胞浸潤(rùn)。肺血管叢樣病變?cè)诔S脤?shí)驗(yàn)動(dòng)物上難以復(fù)制,但可在肉雞(一種生長(zhǎng)快速的肉用型雞)肺臟中自發(fā)形成。內(nèi)皮祖細(xì)胞(EPCs)在組織再生和血管修復(fù)過(guò)程中發(fā)揮重要作用。本研究以肉雞為模型,探討EPCs與肺血管叢樣病變形成之間的關(guān)系。創(chuàng)新點(diǎn):證實(shí)EPCs參與了肺血管叢樣病變的形成過(guò)程,并揭示了導(dǎo)致EPCs功能障礙的免疫學(xué)機(jī)制。方法:采集14周齡肉雞肺組織,常規(guī)石蠟切片,觀察肺血管叢樣病變的形成情況;采用免疫組化法檢測(cè)EPCs表面標(biāo)志CD133和VEGFR-2的表達(dá)以及肝細(xì)胞生長(zhǎng)因子(HGF)的表達(dá);分離培養(yǎng)晚期EPCs,建立EPCs/淋巴細(xì)胞共培養(yǎng)體系,并在共培養(yǎng)體系中添加20 ng/ml HGF,觀察EPCs增殖、凋亡和體外管樣結(jié)構(gòu)形成的變化。結(jié)論:在不同周齡的肉雞肺組織中均可觀察到處于不同發(fā)展階段的肺血管叢樣病變(圖1)。早期的叢樣病變主要由EPCs(CD133+和VEGFR-2+細(xì)胞)構(gòu)成,HGF在病變實(shí)體中高表達(dá)(圖2)。淋巴細(xì)胞共培...
【文章頁(yè)數(shù)】:11 頁(yè)
【文章目錄】:
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
本文編號(hào):3818396
【文章頁(yè)數(shù)】:11 頁(yè)
【文章目錄】:
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
本文編號(hào):3818396
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