Respir Res:西林素可降低肺动脉压力,延缓肺动脉闭塞和肺血管重塑

2020-04-07 MedSci原创 MedSci原创

C-X-C趋化因子受体4型(CXCR4)可能参与肺动脉高压(PAH)的发展。据描述,CXCR4抑制剂AMD3100对预防PAH模型中的肺动脉肌化有积极作用。西林素是一种传统药物,对CXCR4有拮抗作用

C-X-C趋化因子受体4型(CXCR4)可能参与肺动脉高压(PAH)的发展。据描述,CXCR4抑制剂AMD3100对预防PAH模型中的肺动脉肌化有积极作用。西林素是一种传统药物,对CXCR4有拮抗作用。本研究中,我们利用大鼠PAH模型探究了西林素的作用。

 

使用单一皮下注射的单克隆碱诱导PAH。大鼠维持在慢性缺氧状态(10% O2)下,用或不用西林素维持。为了评估西林素对PAH的疗效,测定和计算了右心室收缩压(RVSP)、Fulton指数(右心室与左心室和室间隔的重量比)、内侧壁厚(%MT)和血管闭塞评分(VOS)。以CXCR4和c-Kit为靶点进行免疫组织化学分析。反转录定量聚合酶链反应检测干细胞标志物CXCR4、干细胞衍生因子-1(SDF-1)、c-Kit和干细胞因子(SCF),以及炎症标志物单核细胞诱导蛋白1(MCP1)、白细胞介素-6(IL-6)和肿瘤坏死因子α(TNFα)的表达。采用t检验和Bonferroni's post hoc检验的单方差分析进行统计学分析。

 

结果显示,西林素治疗1周降低RVSP和Fulton指数。治疗2周,可降低RVSP、Fulton指数、%MT和VOS,并可降低肺动脉中CXCR4、SDF-1和TNFα的表达。相比之下,治疗3周未能改善PAH。随着时间的推移,RVSP、Fulton指数、%MT和VOS逐渐增加,而CXCR4和TNFα的表达在PAH发生2周后出现下降。3周后,SDF-1、c-Kit和SCF开始下降,5周后,MCP1和IL-6逐渐积累。

 

总之,CXCR4抑制剂silibininin可能通过抑制CXCR4/SDF-1轴,可以改善PAH的病情,直到PAH成为严重的、不可逆的病症。西林素可降低肺动脉压力,延缓肺动脉闭塞和肺血管重塑。

 

原始出处:

 

Tingting ZhangNanako Kawaguchi, et al., Silibinin efficacy in a rat model of pulmonary arterial hypertension using monocrotaline and chronic hypoxia. Respir Res. 2019; 20: 79. doi: 10.1186/s12931-019-1041-y

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    2020-04-09 飛歌

    学习了很有用不錯

    0

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    2020-04-07 天地飞扬

    学习了

    0

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JAMA Cardiol:荆志成等发现特发性肺动脉高压的新易感基因!

近日,北京协和医院荆志成教授等联合国内多家单位的研究人员在JAMA心脏病学子刊发文报告,他们发现了特发性肺动脉高压的新基因变异。

Pulm Circ:血清生存素代表了反映CHD-PAH患者可操作性的候选生物标志物

肺动脉高压(PAH)的可逆性决定了先天性心脏病(CHD)合并PAH的治疗难易性,但缺乏评价可逆性的方法。本研究旨在研究不可逆PAH大鼠血清生存素水平,探讨其作为评估CHD患者PAH可逆性的生物标志物的