Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceil...Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceils are believed to possess capability of multi-potent transdifferentiation, which is closely related to the niche, suggesting the importance of establishment of a lung progenitor cell niche model. We hypothesized that pulmonary surfactant-associated protein A （SPA） suicide gene system would cause AT II cell to kill itself through apoptosis and leave its niche. In vitro, the recombinant adeno-associated virus vectors-SPA-thymidine kinase （rAAV-SPA-TK） system was established to get targeted apoptotic AT II cells. The apoptosis of AT II cells was detected by using MTT. The results showed that cloned SPA gene promoter had specific transcriptional activity in SPA high expression cells, and SPA high expression cells （H441） transfected with TK gene had higher sensitivity to ganciclovir （GCV） than SPA low expression cells （A549）. In vivo, increased apoptosis of AT II cells induced by GCV in rAAV-SPA-TK system was observed by TUNEL. Finally, the successful packaging and application of rAAV-SPA-TK system provide experimental basis to get specific lung progenitor cell （AT II） niche in vitro and in vivo.展开更多
Objective To evaluate the alterations of biomarkers in the development and progression of coal workers＇ pneumoconiosis （CWP）. Methods The type and number of cells, and the levels of tumor necrosis factor-alpha （T...Objective To evaluate the alterations of biomarkers in the development and progression of coal workers＇ pneumoconiosis （CWP）. Methods The type and number of cells, and the levels of tumor necrosis factor-alpha （TNF-α）, pulmonary surfactant protein, phospholipids and fibronectin in bronchoalveolar lavage fluid were assayed in 14 health active coal miners, 21 coal miners without CWP and 13 miners with CWP of 0/1 to 1/1. Results Compared to active coal miners without CWP （8,23μg/mL）, TNF-α concentration was gradually decreased when dust exposure was stopped （5.90 μg/mL）. Elevated surfactant protein A （SP-A） level and phosphatidylglycerol （PG） to phosphatidylinositol （PI） ratio were found in miners actively exposed to coal dust （6528 μg/mL for SP-A and 10. for PG/P1）, and both parameters decreased when CWP progressed from CWP （0/1） （3419μg/mL for SP-A and 5.9 for PG/PI） to CWP （1/1） （1654 μg/mL for SP-A and 5.5 for PG/PI）. Conclusion Biomarkers in bronchoalveolar lavage fluid can be used to screen coal miners at high risk of developing coal workers＇ pneumoconiosis.展开更多
【目的】探讨血清涎液化糖链抗原(Krebs von den Lungen-6,KL-6)、肺表面活性物质-A(Surfactant protein A,SP-A)及肺表面活性物质-D(Surfactant protein D,SP-D)对儿童间质性肺疾病(Inter_(s)titial lung disease,ILD)早期诊断及预后...【目的】探讨血清涎液化糖链抗原(Krebs von den Lungen-6,KL-6)、肺表面活性物质-A(Surfactant protein A,SP-A)及肺表面活性物质-D(Surfactant protein D,SP-D)对儿童间质性肺疾病(Inter_(s)titial lung disease,ILD)早期诊断及预后的评估价值。【方法】选取2016年3月至2020年7月本院呼吸内科诊治的ILD患儿35例(ILD组),另外选取同期在本院诊治感染性肺炎患儿40例(肺炎组)以及40名健康体检儿童作为对照组,检测三组血清KL-6、SP-A、SP-D水平,并分析其对儿童ILD早期诊断及预后评估的价值。【结果】ILD组血清KL-6、SP-A、SP-D水平高于肺炎组和对照组(P<0.01)。ILD患儿血清KL-6水平与最大肺活量(VC_(max))、与一秒率(FEV1/FVC)呈正相关(r_(s)=0.339,P<0.05),SP-A水平与25%最大呼气流量(MEF25)呈负相关(r_(s)=-0.252,P<0.05);SP-D水平与VC_(max)呈负相关(r_(s)=-0.214,P<0.05);肺间质病变评分与KL-6、SP-A、SP-D呈正相关(r_(s)=0.542、0.618、0.515,P<0.01)。KL-6、SP-A、SP-D三者联合诊断ILD的AUC为0.89、敏感性为83.6%、特异性为97.2%、约登指数为0.81,联合检测对ILD的诊断价值显著高于单独检测(P<0.05)。KL-6、SP-A、SP-D为ILD患儿预后的影响因素(P<0.05)。【结论】KL-6、SP-A、SP-D可作为儿童ILD早期诊断、疾病严重程度及预后的评估指标,三者联合应用可提高诊断ILD的准确性。展开更多
目的探讨氟比洛芬酯预处理后心脏瓣膜置换术患者的肺损伤和血清肺表面活性物质相关蛋白A(pulmonary surfactant associated protein A,SP-A)、白细胞介素-10(interleukin,IL-10)浓度变化。方法随机选取2016年8月至2018年8月四川省自贡...目的探讨氟比洛芬酯预处理后心脏瓣膜置换术患者的肺损伤和血清肺表面活性物质相关蛋白A(pulmonary surfactant associated protein A,SP-A)、白细胞介素-10(interleukin,IL-10)浓度变化。方法随机选取2016年8月至2018年8月四川省自贡市第四人民医院心脏瓣膜置换术患者120例,随机分为2组:氟比洛芬酯预处理组(氟比洛芬酯组,n=60)和0.9%氯化钠溶液预处理组(对照组,n=60)。统计分析两组患者的血流动力学、肺损伤指标、血清SP-A、IL-10浓度、机械通气时间、重症监护病房(intensive care unit,ICU)停留时间、住院时间。结果T1、T2、T3、T4时氟比洛芬酯组患者的心率、平均动脉压均显著高于对照组,差异有统计学意义(P<0.05)。T3时氟比洛芬酯组患者的氧合指数显著高于对照组,差异有统计学意义(P<0.05)。T4时氟比洛芬酯组患者的呼吸指数、肺泡动脉氧分压均显著低于对照组,氧合指数显著高于对照组,差异均有统计学意义(P<0.05)。T2、T3、T4时氟比洛芬酯组患者的血清SP-A浓度均显著低于对照组(P<0.05),血清IL-10浓度均显著高于对照组,差异有统计学意义(P<0.05)。氟比洛芬酯组患者的机械通气时间显著短于对照组,差异有统计学意义(P<0.05)。结论氟比洛芬酯较0.9%氯化钠溶液预处理后心脏瓣膜置换术更能有效减轻患者的肺损伤,降低患者的血清SP-A浓度,提升患者的血清IL-10浓度。展开更多
基金supported by the National Natural Science Foundation of China(No.30500224)
文摘Summary： Alveolar epithelial type II （AT II） cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells （fibroblasts）. Progenitor ceils are believed to possess capability of multi-potent transdifferentiation, which is closely related to the niche, suggesting the importance of establishment of a lung progenitor cell niche model. We hypothesized that pulmonary surfactant-associated protein A （SPA） suicide gene system would cause AT II cell to kill itself through apoptosis and leave its niche. In vitro, the recombinant adeno-associated virus vectors-SPA-thymidine kinase （rAAV-SPA-TK） system was established to get targeted apoptotic AT II cells. The apoptosis of AT II cells was detected by using MTT. The results showed that cloned SPA gene promoter had specific transcriptional activity in SPA high expression cells, and SPA high expression cells （H441） transfected with TK gene had higher sensitivity to ganciclovir （GCV） than SPA low expression cells （A549）. In vivo, increased apoptosis of AT II cells induced by GCV in rAAV-SPA-TK system was observed by TUNEL. Finally, the successful packaging and application of rAAV-SPA-TK system provide experimental basis to get specific lung progenitor cell （AT II） niche in vitro and in vivo.
基金This research was supported by University of Essen in Germany and Xishan Coal & Power Company
文摘Objective To evaluate the alterations of biomarkers in the development and progression of coal workers＇ pneumoconiosis （CWP）. Methods The type and number of cells, and the levels of tumor necrosis factor-alpha （TNF-α）, pulmonary surfactant protein, phospholipids and fibronectin in bronchoalveolar lavage fluid were assayed in 14 health active coal miners, 21 coal miners without CWP and 13 miners with CWP of 0/1 to 1/1. Results Compared to active coal miners without CWP （8,23μg/mL）, TNF-α concentration was gradually decreased when dust exposure was stopped （5.90 μg/mL）. Elevated surfactant protein A （SP-A） level and phosphatidylglycerol （PG） to phosphatidylinositol （PI） ratio were found in miners actively exposed to coal dust （6528 μg/mL for SP-A and 10. for PG/P1）, and both parameters decreased when CWP progressed from CWP （0/1） （3419μg/mL for SP-A and 5.9 for PG/PI） to CWP （1/1） （1654 μg/mL for SP-A and 5.5 for PG/PI）. Conclusion Biomarkers in bronchoalveolar lavage fluid can be used to screen coal miners at high risk of developing coal workers＇ pneumoconiosis.
文摘【目的】探讨血清涎液化糖链抗原(Krebs von den Lungen-6,KL-6)、肺表面活性物质-A(Surfactant protein A,SP-A)及肺表面活性物质-D(Surfactant protein D,SP-D)对儿童间质性肺疾病(Inter_(s)titial lung disease,ILD)早期诊断及预后的评估价值。【方法】选取2016年3月至2020年7月本院呼吸内科诊治的ILD患儿35例(ILD组),另外选取同期在本院诊治感染性肺炎患儿40例(肺炎组)以及40名健康体检儿童作为对照组,检测三组血清KL-6、SP-A、SP-D水平,并分析其对儿童ILD早期诊断及预后评估的价值。【结果】ILD组血清KL-6、SP-A、SP-D水平高于肺炎组和对照组(P<0.01)。ILD患儿血清KL-6水平与最大肺活量(VC_(max))、与一秒率(FEV1/FVC)呈正相关(r_(s)=0.339,P<0.05),SP-A水平与25%最大呼气流量(MEF25)呈负相关(r_(s)=-0.252,P<0.05);SP-D水平与VC_(max)呈负相关(r_(s)=-0.214,P<0.05);肺间质病变评分与KL-6、SP-A、SP-D呈正相关(r_(s)=0.542、0.618、0.515,P<0.01)。KL-6、SP-A、SP-D三者联合诊断ILD的AUC为0.89、敏感性为83.6%、特异性为97.2%、约登指数为0.81,联合检测对ILD的诊断价值显著高于单独检测(P<0.05)。KL-6、SP-A、SP-D为ILD患儿预后的影响因素(P<0.05)。【结论】KL-6、SP-A、SP-D可作为儿童ILD早期诊断、疾病严重程度及预后的评估指标,三者联合应用可提高诊断ILD的准确性。
文摘目的探讨氟比洛芬酯预处理后心脏瓣膜置换术患者的肺损伤和血清肺表面活性物质相关蛋白A(pulmonary surfactant associated protein A,SP-A)、白细胞介素-10(interleukin,IL-10)浓度变化。方法随机选取2016年8月至2018年8月四川省自贡市第四人民医院心脏瓣膜置换术患者120例,随机分为2组:氟比洛芬酯预处理组(氟比洛芬酯组,n=60)和0.9%氯化钠溶液预处理组(对照组,n=60)。统计分析两组患者的血流动力学、肺损伤指标、血清SP-A、IL-10浓度、机械通气时间、重症监护病房(intensive care unit,ICU)停留时间、住院时间。结果T1、T2、T3、T4时氟比洛芬酯组患者的心率、平均动脉压均显著高于对照组,差异有统计学意义(P<0.05)。T3时氟比洛芬酯组患者的氧合指数显著高于对照组,差异有统计学意义(P<0.05)。T4时氟比洛芬酯组患者的呼吸指数、肺泡动脉氧分压均显著低于对照组,氧合指数显著高于对照组,差异均有统计学意义(P<0.05)。T2、T3、T4时氟比洛芬酯组患者的血清SP-A浓度均显著低于对照组(P<0.05),血清IL-10浓度均显著高于对照组,差异有统计学意义(P<0.05)。氟比洛芬酯组患者的机械通气时间显著短于对照组,差异有统计学意义(P<0.05)。结论氟比洛芬酯较0.9%氯化钠溶液预处理后心脏瓣膜置换术更能有效减轻患者的肺损伤,降低患者的血清SP-A浓度,提升患者的血清IL-10浓度。
