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Loss of peptidylarginine deiminase 4 mitigates maladaptive cardiac remodeling after myocardial infarction through inhibition of inflammatory and profibrotic pathways 肽精氨酸脱亚胺酶4的缺失通过抑制炎症和纤维化途径减轻心肌梗死后不适应的心脏重构
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-04-17 DOI: 10.1016/j.trsl.2025.04.003
Michelle Holthaus , Xiaolin Xiong , Kaveh Eghbalzadeh , Clara Großmann , Simon Geißen , Fabian Piontek , Martin Mollenhauer , Ali T. Abdallah , Thomas Kamphausen , Markus Rothschild , Thorsten Wahlers , Adnana Paunel-Görgülü
Inflammation and progressive fibrosis represent predictive risk factors for heart failure (HF) development following myocardial infarction (MI). Peptidylargininine deiminase 4 (PAD4) catalyzes the citrullination of arginine residues in polypeptides and has recently been identified as a contributor to HF pathogenesis. This study aimed to evaluate the role of PAD4 in monocytes / macrophages (Mo/Mφ) and cardiac fibroblasts (CFs) for cardiac repair following MI and HF progression. Cardiac Padi4 expression significantly increased in mice subjected to MI by permanent coronary artery ligation as well as in humans who died from MI. Transcriptome analysis revealed marked downregulation of inflammation-related genes in infarcted hearts and cardiac Mo/Mφ from global PAD4 knockout (PAD4−/−) mice on day 7 post-MI accompanied by increased frequency of reparative CD206+ macrophages. Mechanistically, pharmacological and genetic PAD4 inhibition abrogated nuclear NF-κB translocation and inflammatory gene expression in bone marrow-derived macrophages (BMDM). Simultaneously, reduced inflammation and diminished cardiac levels of transforming growth factor-β (TGF-β) along with impaired IL-6 / TGF-β signaling in PAD4−/− CFs were associated with decreased expression of fibrotic genes, reduced collagen deposition, improved cardiac function, and enhanced 28-day survival in PAD4−/− mice. Strikingly, whereas pharmacological PAD inhibition in the acute phase after MI exacerbated cardiac damage, treatment starting on day 7 ameliorated cardiac remodeling and improved long-term survival in mice. Collectively, we here identified PAD4 as a critical regulator of inflammatory genes in Mo/Mφ and of profibrotic pathways in CFs. Thus, therapeutic approaches directed against PAD4 are promising interventions to alleviate adverse cardiac remodeling and subsequent HF development.
炎症和进行性纤维化是心肌梗死(MI)后心力衰竭(HF)发展的预测危险因素。肽精氨酸脱亚胺酶4 (PAD4)催化多肽中精氨酸残基的瓜氨酸化,最近被确定为HF发病机制的一个贡献者。本研究旨在评估PAD4在心肌梗死和心衰进展后单核/巨噬细胞(Mo/Mφ)和心脏成纤维细胞(CFs)心脏修复中的作用。永久性冠状动脉结痂导致心肌梗死的小鼠以及心肌梗死死亡的人心脏中Padi4的表达显著增加。转录组分析显示,心肌梗死后第7天,PAD4全基因敲除(PAD4−/−)小鼠的梗死心脏和心脏Mo/Mφ中炎症相关基因显著下调,并伴有修复性CD206+巨噬细胞频率增加。在机制上,药物和基因PAD4抑制可消除骨髓源性巨噬细胞(BMDM)的核NF-κB易位和炎症基因表达。同时,PAD4−/−CFs中炎症的减少和心肌转化生长因子-β (TGF-β)水平的降低以及IL-6 / TGF-β信号的受损与纤维化基因表达的降低、胶原沉积的减少、心功能的改善以及PAD4−/−小鼠28天生存率的提高有关。引人注目的是,尽管心肌梗死后急性期的PAD药物抑制加重了心脏损伤,但从第7天开始的治疗改善了小鼠的心脏重塑并提高了长期存活率。总之,我们在这里确定了PAD4是Mo/Mφ中炎症基因和cf中纤维化途径的关键调节因子。因此,针对PAD4的治疗方法有望缓解不良的心脏重构和随后的HF发展。
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引用次数: 0
Kv1.3 expression on CD4 (+) T cells promotes interleukin-17A-associated airway inflammation and airway remodeling in asthma Kv1.3在CD4 (+) T细胞上的表达可促进哮喘患者白细胞介素- 17a相关的气道炎症和气道重塑
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-04-10 DOI: 10.1016/j.trsl.2025.04.001
Bingqing Sun , Jiangtao Lin

Background

Different types of T helper cells play an important role in disease severity and treatment response in patients with asthma. The potassium channel Kv1.3 is a type of potentially therapeutic target in T-cell-mediated inflammatory diseases.

Objective

This study aimed to explore the potential of Kv1.3 as a therapeutic target for asthma and to assess the efficacy of the Kv1.3 inhibitor PAP-1 in the treatment of asthma.

Methods

Kv1.3 expression on CD4+T cells was determined using data from public databases. CD4+T cells were isolated from peripheral blood samples obtained from healthy individuals and patients with asthma. The mouse models of OVA-induced asthma and Kv1.3 knockout were established. The underlying mechanism was investigated using mouse splenic CD4+T cells and BEAS-2B cells. OVA-induced asthmatic mice were treated with the Kv1.3 selective blocker PAP-1.

Results

Based on public data, we determined the distribution of Kv1.3 on CD4+T cells, its up-regulation in asthma, and its correlation with Th17/Treg balance. Upregulation of Kv1.3 in CD4+T cells was associated with enhanced activation of these cells and airway inflammation in patients and mice with asthma, accompanied by increased IL-17A levels in alveolar lavage fluid. Conversely, Kv1.3 deficiency significantly attenuated airway inflammation, lowered IL-17A levels in bronchoalveolar lavage fluid, and inhibited airway epithelial-mesenchymal transition in asthmatic mice. Furthermore, treatment with the Kv1.3 selective blocker PAP-1 attenuated inflammation in lung tissues and prevented airway remodeling in OVA-induced asthmatic mice.

Conclusions

Kv1.3 expression on CD4+ T cells was correlated with IL-17A-associated airway inflammation and remodeling in asthma, which may be regarded as a potential diagnostic marker and therapeutic target for asthma.

Translational significance

Based on our study, Kv1.3 expression on CD4+T cells was correlated with IL-17A-associated airway inflammation and remodeling in asthma, which may be regarded as a potential diagnostic marker and therapeutic target for asthma. The treatment with the Kv1.3 selective blocker PAP-1 attenuated inflammation in lung tissues and prevented airway remodeling in OVA-induced asthmatic mice. Our discoveries offer novel perspectives for a better understanding of IL-17A-associated airway remodeling in asthma. The development of drugs targeting Kv1.3 holds application value for IL-17A-associated asthma.
不同类型的辅助性T细胞在哮喘患者的疾病严重程度和治疗反应中起重要作用。钾通道Kv1.3是t细胞介导的炎症性疾病的一种潜在治疗靶点。目的探讨Kv1.3作为哮喘治疗靶点的潜力,评估Kv1.3抑制剂PAP-1治疗哮喘的疗效。方法利用公共数据库数据检测CD4+T细胞中skv1.3的表达。从健康个体和哮喘患者的外周血样本中分离出CD4+T细胞。建立ova致哮喘小鼠模型和Kv1.3基因敲除模型。利用小鼠脾CD4+T细胞和BEAS-2B细胞研究其潜在机制。用Kv1.3选择性阻断剂PAP-1治疗ova诱导的哮喘小鼠。结果基于公开数据,我们确定了Kv1.3在CD4+T细胞上的分布、哮喘患者Kv1.3的上调及其与Th17/Treg平衡的相关性。在哮喘患者和小鼠中,CD4+T细胞中Kv1.3的上调与这些细胞的激活增强和气道炎症有关,并伴有肺泡灌洗液中IL-17A水平升高。相反,Kv1.3缺乏可显著减轻哮喘小鼠气道炎症,降低支气管肺泡灌洗液中IL-17A水平,抑制气道上皮-间质转化。结论skv1.3在CD4+ T细胞上的表达与il - 17a相关的哮喘气道炎症和气道重构相关,可作为哮喘的潜在诊断标志物和治疗靶点。根据我们的研究,Kv1.3在CD4+T细胞上的表达与il - 17a相关的哮喘气道炎症和重塑相关,可作为哮喘的潜在诊断标志物和治疗靶点。Kv1.3选择性阻滞剂PAP-1可减轻ova诱导的哮喘小鼠肺组织炎症,阻止气道重塑。我们的发现为更好地理解il - 17a相关的哮喘气道重塑提供了新的视角。靶向Kv1.3的药物开发对il - 17a相关哮喘具有应用价值。
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引用次数: 0
Optical coherence tomography for the qualitative analysis of thyroid tissue images: Feasibility, features, and clinical potential 用于甲状腺组织图像定性分析的光学相干断层扫描:可行性、特征和临床潜力。
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-25 DOI: 10.1016/j.trsl.2025.03.003
Yun Shao , Qianru Xu , Cuixia Feng , Yang Liu , Baolei Jia , Yuning Song , Yuxuan Qiu , Qing Xu , Yanhong Tai , Feng Liang
The most important steps in thyroid surgery include distinguishing benign from malignant lesions and identifying the parathyroid glands. Optical coherence tomography (OCT) provides technical support for intraoperative guidance owing to its real-time, three-dimensional imaging capability. Benign and malignant diagnoses can be confirmed with intraoperative frozen sections; however, current approaches are time-consuming and labor-intensive and do not allow comprehensive, nondestructive tissue assessments. This study aimed to explore the use of OCT for imaging the thyroid tissue by verifying its clinical feasibility and qualitatively analyzing the OCT imaging characteristics of pathological thyroid glands. A customized swept-source OCT (SS-OCT) system was used to collect OCT data corresponding to the pathologies of 61 freshly excised tissue blocks containing either benign or malignant lesions from 45 patients. The OCT images were highly consistent with the H&E histological images, verifying the feasibility of OCT in producing suitable images for analysis. The OCT-derived characteristics of the thyroid tissue were as follows: normal thyroid follicles presented with regularly arranged honeycomb structures; follicular nodular disease (FND) was characterized by heterogeneous nodules composed of follicles of different sizes, with multiple nodules also differing in size and consisting of varied reticular structures and a focally solid appearance; lymphocyte aggregation led to a gray‒black appearance in Hashimoto's thyroiditis tumors; and papillary thyroid carcinoma lesions were characterized by a heterogeneous texture and a low penetration depth. These results demonstrate the imaging capabilities of OCT for thyroid tissue with different pathological conditions and its broad prospects for clinical application.
甲状腺手术中最重要的步骤包括区分良性和恶性病变以及识别甲状旁腺。光学相干断层扫描(OCT)以其实时、三维成像能力为术中引导提供技术支持。术中冷冻切片可确诊良恶性;然而,目前的方法是耗时和劳动密集型的,不允许全面的,非破坏性的组织评估。本研究旨在通过验证OCT对甲状腺组织成像的临床可行性,定性分析病理甲状腺的OCT成像特征,探讨其应用价值。使用定制的扫描源OCT (SS-OCT)系统收集来自45例患者的61个新鲜切除的组织块的病理对应的OCT数据,这些组织块包含良性或恶性病变。OCT图像与H&E组织学图像高度一致,验证了OCT生成适合分析的图像的可行性。oct衍生的甲状腺组织特征如下:正常甲状腺滤泡呈规则排列的蜂窝状结构;卵泡结节病(FND)的特征是由不同大小的卵泡组成的异质性结节,多个结节大小不一,由不同的网状结构组成,局部呈实性外观;淋巴细胞聚集导致桥本甲状腺炎肿瘤呈灰黑色外观;甲状腺乳头状癌病变具有质地不均、浸润深度低的特点。这些结果显示了OCT对不同病理条件下甲状腺组织的成像能力和临床应用的广阔前景。
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引用次数: 0
Soluble ST2 is an early marker and treatment target for hypertensive nephrosclerosis signatured in glomerular mesangial cells 可溶性ST2是肾小球系膜细胞中高血压性肾硬化的早期标志物和治疗靶点。
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-15 DOI: 10.1016/j.trsl.2025.03.001
Jeong Min Cho , Seong Joon Park , Young Joo Kim , Saram Lee , Sunhwa Lee , Dha Woon Im , Semin Cho , Ran-hui Cha , Jae Wook Lee , Dong Ki Kim , Kook-Hwan Oh , Kwon Wook Joo , Yon Su Kim , Yong Chul Kim , Seung Hee Yang
The absence of a biologic marker for hypertensive nephrosclerosis (HN) remains a challenge. This study aimed at exploring the relationship between sST2 and early HN and examining their interaction in glomerular mesangial cells. The serum sST2 levels of healthy controls (HC; n=9), patients with HN (n=15), and patients with lupus nephritis (LN; n=27) were measured using ELISA. The association between the serum sST2 levels and clinicopathologic characteristics, including kidney function and mesangial proliferation, were assessed. The expression of ST2 and fibrotic markers in glomerular mesangial cells in hypertensive conditions was evaluated using a 5/6 nephrectomy rat model. To mimic intraglomerular hypertension, human primary glomerular mesangial cells (hPGMCs) were subjected to a 3-mmHg pressure using a newly developed mechanical pressurizing device. The cells were then treated with anti-ST2 antibody (0.5 and 1 μg/mL) to examine inflammation, apoptosis, and necrosis. The serum sST2 levels were significantly higher in the HN and LN groups than in the HC group. Increased expression of ST2 and fibrotic markers in glomerular mesangial cells was observed in the hypertension-induced animal model. In the in vitro study, pressure-stimulated hPGMCs exhibited increased population of early and late apoptosis, which were markedly reduced after treatment with anti-ST2 antibody (1.0 μg/mL). ST2 indicates the early pathologic changes of hypertensive kidney damage and may serve as a mesangial cell-specific marker for HN in terms of determining kidney function and pathologic findings. Thus, ST2 blockade could be a novel therapeutic approach for HN.
缺乏高血压性肾硬化(HN)的生物学标志物仍然是一个挑战。本研究旨在探讨sST2与早期HN的关系,并探讨其在肾小球系膜细胞中的相互作用。健康对照组血清sST2水平(HC;n=9), HN患者(n=15),狼疮性肾炎患者(LN;n=27),采用ELISA法测定。评估血清sST2水平与临床病理特征(包括肾功能和肾小球系膜增殖)之间的关系。采用5/6肾切除大鼠模型,观察高血压患者肾小球系膜细胞中ST2和纤维化标志物的表达。为了模拟肾小球内高血压,使用一种新开发的机械加压装置对人类原发性肾小球系膜细胞(hPGMCs)施加3mmhg的压力。然后用抗st2抗体(0.5和1 μg/mL)处理细胞,观察细胞的炎症、凋亡和坏死。HN和LN组血清sST2水平明显高于HC组。在高血压动物模型中,观察到肾小球系膜细胞中ST2和纤维化标志物的表达增加。体外实验中,压力刺激的hPGMCs出现了早期和晚期细胞凋亡的增加,抗st2抗体(1.0 μg/mL)处理后细胞凋亡明显减少。ST2提示高血压肾损害的早期病理改变,可作为肾小球系膜细胞特异性标志物,用于确定肾功能和病理表现。因此,ST2阻断可能是一种治疗HN的新方法。
{"title":"Soluble ST2 is an early marker and treatment target for hypertensive nephrosclerosis signatured in glomerular mesangial cells","authors":"Jeong Min Cho ,&nbsp;Seong Joon Park ,&nbsp;Young Joo Kim ,&nbsp;Saram Lee ,&nbsp;Sunhwa Lee ,&nbsp;Dha Woon Im ,&nbsp;Semin Cho ,&nbsp;Ran-hui Cha ,&nbsp;Jae Wook Lee ,&nbsp;Dong Ki Kim ,&nbsp;Kook-Hwan Oh ,&nbsp;Kwon Wook Joo ,&nbsp;Yon Su Kim ,&nbsp;Yong Chul Kim ,&nbsp;Seung Hee Yang","doi":"10.1016/j.trsl.2025.03.001","DOIUrl":"10.1016/j.trsl.2025.03.001","url":null,"abstract":"<div><div>The absence of a biologic marker for hypertensive nephrosclerosis (HN) remains a challenge. This study aimed at exploring the relationship between sST2 and early HN and examining their interaction in glomerular mesangial cells. The serum sST2 levels of healthy controls (HC; n=9), patients with HN (n=15), and patients with lupus nephritis (LN; n=27) were measured using ELISA. The association between the serum sST2 levels and clinicopathologic characteristics, including kidney function and mesangial proliferation, were assessed. The expression of ST2 and fibrotic markers in glomerular mesangial cells in hypertensive conditions was evaluated using a 5/6 nephrectomy rat model. To mimic intraglomerular hypertension, human primary glomerular mesangial cells (hPGMCs) were subjected to a 3-mmHg pressure using a newly developed mechanical pressurizing device. The cells were then treated with anti-ST2 antibody (0.5 and 1 μg/mL) to examine inflammation, apoptosis, and necrosis. The serum sST2 levels were significantly higher in the HN and LN groups than in the HC group. Increased expression of ST2 and fibrotic markers in glomerular mesangial cells was observed in the hypertension-induced animal model. In the <em>in vitro</em> study, pressure-stimulated hPGMCs exhibited increased population of early and late apoptosis, which were markedly reduced after treatment with anti-ST2 antibody (1.0 μg/mL). ST2 indicates the early pathologic changes of hypertensive kidney damage and may serve as a mesangial cell-specific marker for HN in terms of determining kidney function and pathologic findings. Thus, ST2 blockade could be a novel therapeutic approach for HN.</div></div>","PeriodicalId":23226,"journal":{"name":"Translational Research","volume":"279 ","pages":"Pages 16-26"},"PeriodicalIF":6.4,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Role of DNMT3a expression and nuclear translocation under ELAVL1 mediation for dendritic cell function and Th17/Treg balance in COPD ELAVL1调控下的DNMT3a表达和核转运对慢性阻塞性肺病树突状细胞功能和Th17/Treg平衡的作用
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-12 DOI: 10.1016/j.trsl.2025.03.002
Dan Huang , Bin Tang , Qiugen Li , Bo Tong , Na Liu

Background

Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity and mortality worldwide. The DNA methyltransferase DNMT3a has been implicated in COPD, however its upstream regulation and downstream mechanisms remain unclear.

Methods

Relative mRNA and protein levels of indicated genes in lung tissues and dendritic cells (DCs) were tested via qRT-PCR and western blot, respectively. Cellular distribution of DNMT3a in DCs was determined by immunofluorescence staining. COPD mouse model was established by exposing mice to cigarette smoke (CS) via nose. The Th17/Treg cell ratio was examined using flow cytometry. Production of indicated cytokines was assessed by corresponding commercial ELISA kit. Interplay between DACH1 and c-Jun was verified by Co-immunoprecipitation, ChIP and luciferase reporter assays. Methylation level of DACH1 was tested by methylation specific PCR.

Results

DNMT3a expression was upregulated and negatively correlated with lung function in COPD patients. CS exposure increased pulmonary DNMT3a in mice. DNMT3a was predominantly expressed in the nucleus and CS exposure promoted its translocation to cytoplasm. RNA binding protein ELAVL1 upregulated DNMT3a expression, induced its nuclear translocation and increased its enzyme activity. DNMT3a promoted Th17 differentiation while inhibited Treg differentiation. DNMT3a methylated DACH1 and inhibited its expression, resulting in c-Jun pathway activation. In vivo DNMT3a knockdown ameliorated lung injury and Th17/Treg imbalance in COPD mice.

Conclusion

This study suggests that ELAVL1 regulates DNMT3a expression and nuclear translocation to modulate dendritic cell function and Th17/Treg balance through DACH1/c-Jun pathway in COPD.
背景:慢性阻塞性肺疾病(COPD)是世界范围内发病率和死亡率的主要原因。DNA甲基转移酶DNMT3a与COPD有关,但其上游调控和下游机制尚不清楚。方法:分别采用qRT-PCR和western blot检测肺组织和树突状细胞(dc)中相关基因的相对mRNA和蛋白水平。免疫荧光染色测定DNMT3a在DCs中的细胞分布。采用经鼻暴露于香烟烟雾(CS)的方法建立COPD小鼠模型。流式细胞术检测Th17/Treg细胞比例。用相应的商用酶联免疫吸附试验(ELISA)试剂盒检测所示细胞因子的产生。通过免疫沉淀、ChIP和荧光素酶报告基因检测证实DACH1与c-Jun之间的相互作用。采用甲基化特异性PCR检测DACH1的甲基化水平。结果:COPD患者DNMT3a表达上调,与肺功能呈负相关。CS暴露增加小鼠肺部DNMT3a。DNMT3a主要在细胞核中表达,CS暴露促进其向细胞质转运。RNA结合蛋白ELAVL1上调DNMT3a的表达,诱导其核易位,提高其酶活性。DNMT3a促进Th17分化,抑制Treg分化。DNMT3a甲基化DACH1并抑制其表达,导致c-Jun通路激活。体内DNMT3a敲低可改善COPD小鼠的肺损伤和Th17/Treg失衡。结论:本研究提示ELAVL1通过DACH1/c-Jun通路调控DNMT3a表达和核易位,调节COPD患者树突状细胞功能和Th17/Treg平衡。
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引用次数: 0
Author Guidelines 作者指导方针
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-10 DOI: 10.1016/S1931-5244(25)00031-3
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引用次数: 0
Information for Readers 读者资讯
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-10 DOI: 10.1016/S1931-5244(25)00032-5
{"title":"Information for Readers","authors":"","doi":"10.1016/S1931-5244(25)00032-5","DOIUrl":"10.1016/S1931-5244(25)00032-5","url":null,"abstract":"","PeriodicalId":23226,"journal":{"name":"Translational Research","volume":"278 ","pages":"Page IBC"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Editorial Advisory Board 编辑顾问委员会
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-03-10 DOI: 10.1016/S1931-5244(25)00030-1
{"title":"Editorial Advisory Board","authors":"","doi":"10.1016/S1931-5244(25)00030-1","DOIUrl":"10.1016/S1931-5244(25)00030-1","url":null,"abstract":"","PeriodicalId":23226,"journal":{"name":"Translational Research","volume":"278 ","pages":"Page ii"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Caspase-12 exhibits non-redundant functions in response to endoplasmic reticulum stress to promote GSDMD-mediated NETosis, leading to thoracic aortic dissection Caspase-12在内质网应激反应中表现出非冗余功能,促进gsdmd介导的NETosis,导致胸主动脉夹层。
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-02-25 DOI: 10.1016/j.trsl.2025.02.005
Hanchuan Chen , Kun Yang , Shumin Zhang , Gulinazi Yesitayi , Yunzhi Ling , Rifeng Gao , Yang Lyu , Wei Wei , Jiaran Shi , Yulin Li , Xiang Ma , Pingjin Gao , Junbo Ge , Aijun Sun

Background

Thoracic aortic dissection (TAD) is a highly lethal condition that is characterized by inflammatory cell infiltration. Recent evidence has indicated that Gasdermin D (GSDMD) plays an important role in vascular inflammation and degeneration. However, its effects on neutrophil extracellular trap formation and release (NETosis) during TAD remain unknown.

Methods

A TAD mouse model was generated using four-week-old male neutrophil-specific GSDMD-knockout mice (GSDMDF/F; ElaneCre) and dimethyl fumarate (DMF)-treated C57BL/6J mice by administering β-aminopropionitrile monofumarate (BAPN; 1 g/kg/day) in their drinking water for 4 weeks. Immunoprecipitation and immunofluorescence assays were performed to examine the role of the endoplasmic reticulum (ER) and its associated protein, caspase-12, in GSDMD-induced NETosis.

Results

GSDMD was elevated and co-localized primarily in neutrophils in the aortic tissues of patients with TAD and mice with BAPN-induced TAD. This was accompanied by increased NETosis. Neutrophil-specific GSDMD knockout and the NETosis inhibitor, GSK484, mitigated TAD development in mice. However, GSK484 did not provide additional therapeutic effects against TAD in the neutrophil-specific, GSDMD knockout mice. Mechanistically, ER stress promoted GSDMD cleavage by caspase-4/11, thereby inducing NETosis. Furthermore, caspase-12 exhibited non-redundant functions in the cleavage of GSDMD by caspase-4/11. The GSDMD inhibitor, DMF, partially prevented TAD development.

Conclusions

The ER stress/GSDMD/NETosis signaling pathway provides a potential therapeutic target for the prevention and treatment of TAD.
背景:胸主动脉夹层(TAD)是一种以炎症细胞浸润为特征的高致死率疾病。最近的证据表明,GSDMD在血管炎症和变性中起重要作用。然而,其对TAD期间中性粒细胞胞外陷阱形成和释放(NETosis)的影响尚不清楚。方法:采用4周龄雄性中性粒细胞特异性gsdmd敲除小鼠(GSDMDF/F;ElaneCre)和富马酸二甲酯(DMF)治疗C57BL/6J小鼠的方法是给药β-氨基丙腈单马酸酯(BAPN;1 g/kg/天),持续4周。采用免疫沉淀法和免疫荧光法检测内质网(ER)及其相关蛋白caspase-12在gsdmd诱导的NETosis中的作用。结果:GSDMD在TAD患者和bapn诱导的TAD小鼠主动脉组织的中性粒细胞中升高并共定位。这伴随着NETosis的增加。中性粒细胞特异性GSDMD敲除和NETosis抑制剂GSK484可减轻小鼠TAD的发展。然而,GSK484对中性粒细胞特异性GSDMD敲除小鼠的TAD没有提供额外的治疗作用。机制上,内质网应激通过caspase-4/11促进GSDMD裂解,从而诱导NETosis。此外,caspase-12在caspase-4/11对GSDMD的切割中表现出非冗余功能。GSDMD抑制剂DMF部分阻止了TAD的发展。结论:内质网应激/GSDMD/NETosis信号通路为TAD的预防和治疗提供了潜在的治疗靶点。
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引用次数: 0
Effects of senotherapeutics on gut microbiome dysbiosis and intestinal inflammation in Crohn's disease: A pilot study 老年治疗药物对克罗恩病肠道菌群失调和肠道炎症的影响:一项初步研究
IF 6.4 2区 医学 Q1 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-02-20 DOI: 10.1016/j.trsl.2025.02.004
Nannapat Sangfuang , Laura E. McCoubrey , Atheer Awad , Massimo Marzorati , Jonas Ghyselinck , Lynn Verstrepen , Julie De Munck , Jelle De Medts , Simon Gaisford , Abdul W. Basit
Inflammatory Bowel Disease (IBD) is characterized by chronic inflammation in the gastrointestinal tract, and is usually accompanied by dysbiosis in the gut microbiome, a factor that contributes to disease progression. Excessive production of reactive oxygen species (ROS) because of gut microbiome dysbiosis—one of the hallmark features of IBD—promotes chronic inflammation and facilitates the transformation of normal cells into senescent cells. Cellular senescence is associated with the development of various chronic and age-related diseases. We hypothesise that senolytic agents, specifically dasatinib (D) and quercetin (Q), could have a beneficial effect on both the gut microbiome and intestinal cells in IBD. The modulatory effects of a combination of D + Q was assessed in the M-SHIME model with faecal microbiota sourced from Crohn's disease patients. D + Q significantly modulated butyrate and lactate levels in the samples from specific patients. In addition, metabolomic analysis showed that D + Q positively impacted the abundance of anti-inflammatory bacteria while also significantly reducing the several species of pathogenic bacteria. Findings from a Caco-2 cell/THP1 co-culture model of IBD demonstrated that D + Q exerted strong immunomodulatory effects on the gut epithelium, evidenced by reduced NF-kB activity, and lower levels of the pro-inflammatory markers TNF-α, CXCL-10, and MCP-1. Furthermore, D + Q induced the secretion of anti-inflammatory cytokines, including IL-6 and IL-10. However, it should be noted that D + Q also led to the secretion of the pro-inflammatory cytokines IL-8. These findings suggest that D + Q could offer a novel therapeutic approach for advanced IBD management by modulating both the gut microbiome and inflammatory pathways. The results support the potential repurposing of senotherapeutic agents as a strategy for addressing the chronic inflammation central to IBD pathogenesis
炎症性肠病(IBD)以胃肠道慢性炎症为特征,通常伴有肠道微生物群的生态失调,这是导致疾病进展的一个因素。肠道微生物群失调导致活性氧(ROS)的过量产生——ibd的标志性特征之一——会促进慢性炎症,并促进正常细胞向衰老细胞的转化。细胞衰老与各种慢性和年龄相关疾病的发展有关。我们假设,抗衰老药物,特别是达沙替尼(D)和槲皮素(Q),可能对IBD的肠道微生物群和肠道细胞都有有益的影响。在M-SHIME模型中评估D + Q组合的调节作用,该模型使用来自克罗恩病患者的粪便微生物群。D + Q可显著调节特定患者样品中的丁酸盐和乳酸水平。此外,代谢组学分析显示,D + Q正影响抗炎细菌的丰度,同时也显著减少了几种致病菌。来自IBD Caco-2细胞/THP1共培养模型的研究结果表明,D + Q对肠道上皮具有很强的免疫调节作用,其证据是NF-kB活性降低,促炎标志物TNF-α、CXCL-10和MCP-1水平降低。此外,D + Q诱导抗炎细胞因子IL-6和IL-10的分泌。但需要注意的是,D + Q也导致促炎细胞因子IL-8的分泌。这些发现表明,D + Q可以通过调节肠道微生物群和炎症途径,为晚期IBD治疗提供一种新的治疗方法。这些结果支持将老年治疗药物作为解决IBD发病机制中心慢性炎症的一种策略
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Translational Research
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