Porcine respiratory disease complex induces pulmonary fibrosis related to the aberrant sphingolipid metabolism

IF 2.2 4区 医学 Q3 PATHOLOGY
Xiangfang Tang, Gaokai Li, Lijun Shi, Tao Liu, Zhiyong Si, Guangbo Li, Weiquan Yu, Tao Zhang, Zhenwen Zhao, Xinghui Zhao, Zhanzhong Zhao
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引用次数: 0

Abstract

Porcine respiratory disease complex (PRDC) is a common syndrome in the modern swine industry worldwide, and its pathogenesis remains unclear to date. Our study aimed to investigate PRDC-induced pulmonary fibrosis and sphingolipid metabolism, and their relationship. Mouse and cell line (A549 and 3D4/21) models exposed to bleomycin and/or transforming growth factor-β1 (TGF-β1) were developed. Histopathological and immunohistochemical staining, colorimetry, lipidomics analysis and pharmacologic intervention assays were used to analyse lung fibrosis and sphingolipid profiles. PRDC was validated by the presence of alveolar epithelial cell (AEC) injury and hyperplasia, inflammatory infiltrates, asymmetric macrophage polarization and mast cell phenotypic changes, TGF-β1 and fibroblast growth factor 2 (FGF-2) overproduction, extensive collagen deposition, foci of fibroblast/myofibroblast with stress fibres (α-SMA, γ-SMA and γ2 actin), cell interaction with increasing frequency, proliferation, apoptosis and autophagy dysregulation, and mucin 6 release—all of which are characteristics of pulmonary fibrosis. Based on the sphingolipidomics and pharmacologic interventions data—the dysregulated sphingolipids, including sphingomyelin (SM), ceramide (Cer), sphingosine-1-phosphate (S1P) and cerebroside (Cb), possibly due to serine palmitoyltransferase (SPT; SPTLC1), ceramide synthase (CerS; CerS2, CerS4), sphingomyelin synthase (SMS; SMS1), neutral sphingomyelinase (NSMase), acid sphingomyelinase (ASMase; SMPDL3B) and sphingosine kinase (SphK; SphK1, SphK2), were found to be closely related to pulmonary fibrosis. Furthermore, d18:1 24:1 SM and 18:1 S1P may be conserved biomarkers and tiamulin fumarate (TF) changes have anti-fibrotic activity. Overall, PRDC induces pulmonary fibrosis, related to the aberrant sphingolipid metabolism, where conserved sphingolipid biomarkers and anti-fibrotic candidates have been found.

猪呼吸系统疾病复合体诱导与鞘脂代谢异常相关的肺纤维化
猪呼吸系统疾病(PRDC)是现代养猪业中一种常见的综合征,其发病机制至今仍不清楚。本研究旨在探讨prdc诱导的肺纤维化与鞘脂代谢的关系。建立博来霉素和/或转化生长因子-β1 (TGF-β1)暴露的小鼠和细胞系(A549和3D4/21)模型。组织病理学和免疫组织化学染色、比色法、脂质组学分析和药物干预分析用于分析肺纤维化和鞘脂谱。PRDC被证实存在肺泡上皮细胞(AEC)损伤和增生、炎症浸润、不对称巨噬细胞极化和肥大细胞表型改变、TGF-β1和成纤维细胞生长因子2 (FGF-2)过量生产、广泛的胶原沉积、成纤维细胞/肌成纤维细胞灶与应激纤维(α-SMA、γ-SMA和γ- 2肌动蛋白)、细胞相互作用频率增加、增殖、凋亡和自噬失调。以及黏液蛋白6的释放,这些都是肺纤维化的特征。根据鞘脂组学和药理学干预数据,鞘磷脂包括鞘磷脂(SM)、神经酰胺(Cer)、鞘磷脂-1-磷酸(S1P)和脑苷(Cb)失调,可能是由于丝氨酸棕榈酰基转移酶(SPT; SPTLC1)、神经酰胺合成酶(CerS; CerS2, CerS4)、鞘磷脂合成酶(SMS; SMS1)、中性鞘磷脂酶(NSMase)、酸性鞘磷脂酶(ASMase; SMPDL3B)和鞘磷脂激酶(SphK;SphK1、SphK2)与肺纤维化密切相关。此外,d18:1 24:1 SM和18:1 S1P可能是保守的生物标志物,富马酸硫霉素(TF)的变化具有抗纤维化活性。总的来说,PRDC诱导肺纤维化,与异常鞘脂代谢有关,其中保守的鞘脂生物标志物和抗纤维化候选物已被发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.50
自引率
3.30%
发文量
35
审稿时长
>12 weeks
期刊介绍: Experimental Pathology encompasses the use of multidisciplinary scientific techniques to investigate the pathogenesis and progression of pathologic processes. The International Journal of Experimental Pathology - IJEP - publishes papers which afford new and imaginative insights into the basic mechanisms underlying human disease, including in vitro work, animal models, and clinical research. Aiming to report on work that addresses the common theme of mechanism at a cellular and molecular level, IJEP publishes both original experimental investigations and review articles. Recent themes for review series have covered topics as diverse as "Viruses and Cancer", "Granulomatous Diseases", "Stem cells" and "Cardiovascular Pathology".
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