脂肪酸结合蛋白5通过激活wnt/β-catenin通路加重左心病继发肺动脉高压肺动脉纤维化

2022-09-16 刘少飞 MedSci原创

在这里,我们着手说明脂肪酸结合蛋白 5 (FABP5) 在 PH-LHD 发展中的功能作用和潜在机制。

肺动脉高压(PH)是一种以肺动脉压升高为特征的恶性肺血管病变。持续升高的肺动脉压最终会导致右心功能障碍并随后导致死亡。继发于左心病的肺动脉高压 (PH-LHD) 被世界卫生组织列为第 2 组 PH,是最常见的 PH 形式。PH-LHD 主要由左心衰竭、瓣膜性心脏病 (VHD) 和左心室流入或流出阻塞引起。一旦 PH-LHD 出现,不仅会加重心脏病的症状和运动耐量,还会显着增加发病率和死亡率。然而,由于对病理靶点认识不足,抗PH-LHD治疗的疗效令人失望。继发于左心疾病的肺动脉高压(PH-LHD)是一种常见且致命的疾病。然而,尚未确定有效的治疗靶点。

研究目的:

在这里,我们着手说明脂肪酸结合蛋白 5 (FABP5) 在 PH-LHD 发展中的功能作用和潜在机制。

研究方法:

我们对数据集 GSE84704 和 GSE16624 进行了系统分析,以识别差异表达的基因,然后为重要模块构建蛋白质-蛋白质相互作用网络。通过 RT-qPCR 和蛋白质印迹在 PH-LHD 小鼠模型中验证模块中的潜在靶基因。PH-LHD 或假小鼠用 FABP5 拮抗剂 SBFI-26 或 DMSO 治疗 28 天。通过超声心动图确定FABP5对心脏功能的作用,通过右心导管、组织学分析和蛋白质印迹评估其对肺血管重塑的影响。在体外,原代肺外膜成纤维细胞用于研究涉及 FABP5 的促纤维化机制。

研究结果:

FABP5 是唯一一个在已建立的 PH-LHD 小鼠模型中随着蛋白质表达增加而显着上调。通过注射 SBFI-26 抑制 FABP5 可消除 PH-LHD 中的肺动脉重塑并改善心脏功能。在体外,SBFI-26 或 FABP5 siRNA 减弱了培养的肺外膜成纤维细胞中 TGF-β1 诱导的纤维化反应。从机制上讲,FABP5 敲低抑制了 GSK3β 磷酸化并增加了 β-连环蛋白磷酸化。wnt/β-连环蛋白激动剂 SKL2001 在 TGF-β1 刺激下降低了 FABP5 敲低对肺外膜成纤维细胞的抗纤维化作用。

研究结论:

FABP5 是肺动脉重塑的重要介质,也是 PH-LHD 的潜在治疗靶点。

 

参考文献:

Lei Q, Yu Z, Li H, Cheng J, Wang Y. Fatty acid-binding protein 5 aggravates pulmonary artery fibrosis in pulmonary hypertension secondary to left heart disease via activating wnt/β-catenin pathway. J Adv Res. 2022 Sep;40:197-206. doi: 10.1016/j.jare.2021.11.011. Epub 2021 Nov 26. PMID: 36100327.

 

 

评论区 (4)
#插入话题
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    2023-03-18 feifers

    #继发#

    0

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    2023-02-11 jklm09
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    2022-09-16 zhwj

    #WNT#

    0

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    2022-09-16 路走风吹

    0