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Pathogenetic mechanisms of muscle-specific ribosomes in dilated cardiomyopathy 扩张型心肌病中肌肉特异性核糖体的发病机制。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-06 DOI: 10.1038/s44161-025-00761-8
Michael R. Murphy, Mythily Ganapathi, Esther R. Rotlevi, Teresa M. Lee, Joshua M. Fisher, Megha V. Patel, Parul Jayakar, Amanda Buchanan, Alyssa L. Rippert, Rebecca C. Ahrens-Nicklas, Divya Nair, Shalini S. Nayak, Aakanksha Anand, Anju Shukla, Rajesh K. Soni, Yue Yin, Feiyue Yang, Enrique J. Garcia, Muredach P. Reilly, Wendy K. Chung, Xuebing Wu
The heart uses a muscle-specific ribosome in cardiomyocytes, where the ribosomal protein RPL3 is replaced by its paralog RPL3L. Rare biallelic RPL3L mutations cause fatal neonatal dilated cardiomyopathy, yet the mechanisms that link genotype to heart failure are unclear. Despite the recessive inheritance pattern in humans, Rpl3l knockout mice show no overt cardiac phenotype, probably because of compensatory RPL3 upregulation through unknown mechanisms. Here we report four additional cases and propose a unifying pathogenetic model by integrating human genetics, patient tissues and isogenic cell models. Affected individuals typically carry one of two recurrent hotspot missense variants paired with a private allele. Whereas non-hotspot variants phenocopy knockout and allow RPL3 compensation, hotspot variants induce nucleolar protein aggregation, disrupt rRNA processing and block compensation by preserving the role of RPL3L in repressing RPL3 via unproductive splicing. These findings establish combined loss-of-function and gain-of-function mechanisms for RPL3L-associated cardiomyopathy and inform genetic screening, diagnosis and therapeutic development. Murphy et al. reveal a unifying pathogenetic mechanism according to which diverse mutations in the muscle-specific ribosomal protein RPL3L cause severe neonatal dilated cardiomyopathy, establishing a framework for interpreting the growing spectrum of RPL3L variants.
心脏在心肌细胞中使用肌肉特异性核糖体,其中核糖体蛋白RPL3被其平行的RPL3L所取代。罕见的双等位基因RPL3L突变导致致命性新生儿扩张型心肌病,然而基因型与心力衰竭之间的联系机制尚不清楚。尽管在人类中存在隐性遗传模式,但Rpl3l基因敲除小鼠没有表现出明显的心脏表型,这可能是因为通过未知机制代偿性RPL3上调。在这里,我们报告了另外四个病例,并通过整合人类遗传学,患者组织和等基因细胞模型提出了统一的发病模型。受影响的个体通常携带与私有等位基因配对的两个复发热点错义变体之一。非热点变异体表型敲除并允许RPL3补偿,而热点变异体诱导核仁蛋白聚集,破坏rRNA加工并通过保留RPL3L通过非生产剪接抑制RPL3的作用来阻断补偿。这些发现建立了rpl3l相关心肌病的功能丧失和功能获得的联合机制,并为遗传筛查、诊断和治疗开发提供了信息。
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引用次数: 0
Sphingosine kinase 1 is integral for elastin deficiency-induced arterial hypermuscularization 鞘氨酸激酶1是弹性蛋白缺乏引起的动脉肌肉增生的重要组成部分。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-05 DOI: 10.1038/s44161-025-00762-7
Junichi Saito, Jui M. Dave, Eunate Gallardo-Vara, Nandhini Sadagopan, Inamul Kabir, George Tellides, Robert K. Riemer, Zsolt Urban, Sarah Spiegel, Timothy Hla, Daniel M. Greif
Deficiency of elastin (ELN), the major component of elastic fibers, leads to excess smooth muscle cells (SMCs), which characterizes arterial diseases (for example, supravalvular aortic stenosis (SVAS)) as well as physiological ductus arteriosus (DA) closure. Here we demonstrate that sphingosine kinase 1 (SPHK1) is a key node in these contexts. Sphk1 is the most upregulated transcript in Eln(−/−) aortic SMCs at embryonic day 15.5 when these cells are initially hyperproliferative. The aorta of humans with SVAS also upregulates SPHK1. Reduced ELN increases levels of transcription factor early growth response 1, resulting in increased SPHK1 levels. SMC-specific Sphk1 deletion or pharmacological inhibition of SPHK1 attenuates SMC proliferation and mitigates aortic disease. Furthermore, treatment with a SPHK1 inhibitor reduces DA SMC accumulation, leading to DA patency in wild-type mice. These findings indicate that inhibiting SPHK1 may be a therapeutic strategy for SVAS and select congenital heart diseases in which patent DA maintains circulation. Saito et al. identify sphingosine kinase 1 as a critical regulator of physiological ductus arteriosus closure and pathological supravalvular aortic stenosis through its role in smooth muscle cell proliferation and propose potential therapeutics.
弹性纤维的主要成分弹性蛋白(ELN)缺乏会导致平滑肌细胞(SMCs)过多,这是动脉疾病(例如,瓣上主动脉狭窄(SVAS))和生理性动脉导管(DA)关闭的特征。在这里,我们证明鞘氨酸激酶1 (SPHK1)在这些情况下是一个关键节点。Sphk1在胚胎15.5天的Eln(-/-)主动脉SMCs中表达上调最多,此时这些细胞最初是超增殖的。SVAS患者的主动脉也上调SPHK1。ELN的减少增加了转录因子早期生长反应1的水平,导致SPHK1水平升高。SMC特异性Sphk1缺失或药理抑制Sphk1可减弱SMC增殖并减轻主动脉疾病。此外,用SPHK1抑制剂治疗可以减少DA SMC的积累,导致野生型小鼠DA通畅。这些发现表明抑制SPHK1可能是SVAS和特定先天性心脏病的治疗策略,其中DA专利维持循环。
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引用次数: 0
RADA16 improves the transplantation efficiency and electrical integration of stem cell-derived cardiomyocytes RADA16提高了干细胞源性心肌细胞的移植效率和电整合。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-05 DOI: 10.1038/s44161-025-00770-7
Gerburg Schwaerzer
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引用次数: 0
Sphingolipid signaling links elastin deficiency to arterial hyper-muscularization and congenital heart disease 鞘脂信号将弹性蛋白缺乏与动脉过度肌肉化和先天性心脏病联系起来。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-05 DOI: 10.1038/s44161-025-00763-6
Odai Darawshi, Besim Ogretmen
Defects in elastin trigger hyperproliferation of smooth muscle cells, which leads to arterial and congenital heart diseases. Research now shows that elastin deficiency induces SPHK1 and S1P signaling by EGR1 in SMCs, and inhibitors of SPHK1 or S1PR1 attenuate smooth muscle cell proliferation and mitigate aortic disease.
弹性蛋白的缺陷会引发平滑肌细胞的过度增生,从而导致动脉和先天性心脏病。目前的研究表明,弹性蛋白缺乏在SMCs中通过EGR1诱导SPHK1和S1P信号,SPHK1或S1PR1的抑制剂可减弱平滑肌细胞的增殖并减轻主动脉疾病。
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引用次数: 0
Connecting to improve drug discovery 连接以改善药物发现。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-02 DOI: 10.1038/s44161-025-00760-9
Jennifer L. Hall
Most drugs in phase 2 trials fail to reach regulatory approval. By leveraging machine learning to identify connections between different types of data, including genes, diseases, medications, existing drugs and images, a new approach is shown to increase the level of evidence in identifying drug targets for cardiovascular disease.
大多数处于第二阶段试验的药物都无法获得监管部门的批准。通过利用机器学习来识别不同类型数据之间的联系,包括基因、疾病、药物、现有药物和图像,一种新的方法被证明可以提高识别心血管疾病药物靶点的证据水平。
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引用次数: 0
Insights on the origins of the interventricular septum 关于室间隔起源的见解。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-02 DOI: 10.1038/s44161-025-00766-3
The transcription factor TBX5 regulates early cardiac progenitor cells and genes that encode essential patterning cues for the correct formation of the interventricular septum and separation of cardiac chambers in mice. Disruption of a compartment boundary at the developing interventricular septum reveals potential mechanisms that might underlie some congenital heart defects.
转录因子TBX5调节小鼠早期心脏祖细胞和编码室间隔正确形成和心腔分离所需模式线索的基因。发育中的室间隔间室边界的破坏揭示了一些先天性心脏缺陷的潜在机制。
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引用次数: 0
Real-time measurement of the mitochondrial membrane potential in the intact mouse heart 完整小鼠心脏线粒体膜电位的实时测量。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-02 DOI: 10.1038/s44161-025-00767-2
Correlating the mitochondrial membrane potential with the redox status of endogenous mitochondrial cytochromes in vitro enabled the real-time determination of the mitochondrial membrane potential in an isolated perfused mouse heart. This model was used to provide insights into cardiac ischemia–reperfusion injury.
将线粒体膜电位与体外内源性线粒体细胞色素的氧化还原状态相关联,可以实时测定离体灌注小鼠心脏的线粒体膜电位。该模型用于心脏缺血再灌注损伤的研究。
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引用次数: 0
Loss of function of the obesity-associated gene MC4R reduces cardiovascular risk and increases lipid clearance 肥胖相关基因MC4R功能丧失可降低心血管风险并增加脂质清除率。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2026-01-02 DOI: 10.1038/s44161-025-00764-5
Elisa Martini
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引用次数: 0
A disrupted compartment boundary underlies abnormal cardiac patterning and congenital heart defects 隔室边界的破坏是心脏形态异常和先天性心脏缺陷的基础。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2025-12-29 DOI: 10.1038/s44161-025-00755-6
Irfan S. Kathiriya, Martin H. Dominguez, Kavitha S. Rao, Jonathon M. Muncie-Vasic, W. Patrick Devine, Kevin M. Hu, Swetansu K. Hota, Bayardo I. Garay, Diego Quintero, Piyush Goyal, Megan N. Matthews, Reuben Thomas, Tatyana Sukonnik, Dario Miguel-Perez, Sarah Winchester, Emily F. Brower, André Forjaz, Pei-Hsun Wu, Denis Wirtz, Ashley L. Kiemen, Benoit G. Bruneau
Failure of septation of the interventricular septum (IVS) is the most common congenital heart defect, but mechanisms for patterning the IVS are largely unknown. Here we show that a Tbx5+/Mef2cAHF+ progenitor lineage forms a compartment boundary bisecting the IVS. This coordinated population originates at a first and second heart field interface. Ablation of Tbx5+/Mef2cAHF+ progenitors causes IVS disorganization, right ventricular hypoplasia and mixing of IVS lineages. Reduced dosage of the congenital heart defect transcription factor TBX5 disrupts boundary position and integrity, resulting in ventricular septation defects and patterning defects, including misexpression of Slit2 and Ntn1, which encode guidance cues. Reducing NTN1 dosage partly rescues cardiac defects in Tbx5 mutant embryos. Loss of Slit2 or Ntn1 causes ventricular septation defects and perturbed septal lineage distributions. Thus, we identify Tbx5 as a candidate selector gene, directing progenitors and regulating essential cues, to pattern a compartment boundary for proper cardiac septation, revealing mechanisms for cardiac birth defects. Kathiriya et al. identify a cardiac progenitor lineage with expression of Tbx5 and anterior heart field-specific expression of Mef2c that bisects the intraventricular septum during development and show that alterations in this lineage lead to congenital heart defects in mice.
室间隔分隔失败是最常见的先天性心脏缺陷,但室间隔的机制在很大程度上是未知的。在这里,我们发现Tbx5+/Mef2cAHF+祖谱系形成了一个分隔IVS的隔室边界。这种协调的人口起源于第一和第二心脏场界面。Tbx5+/Mef2cAHF+祖细胞消融导致IVS紊乱、右心室发育不全和IVS谱系混合。减少先天性心脏缺陷转录因子TBX5的剂量会破坏边界位置和完整性,导致室间隔缺陷和模式缺陷,包括编码引导信号的Slit2和Ntn1的错误表达。减少NTN1剂量可部分挽救Tbx5突变胚胎的心脏缺陷。Slit2或Ntn1缺失导致室间隔缺损和室间隔谱系分布紊乱。因此,我们确定Tbx5是一个候选选择基因,它指导祖细胞并调节必要的线索,为适当的心脏间隔塑造一个室边界,揭示心脏出生缺陷的机制。
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引用次数: 0
A multimodal vision knowledge graph of cardiovascular disease 心血管疾病的多模态视觉知识图谱。
IF 10.8 Q1 CARDIAC & CARDIOVASCULAR SYSTEMS Pub Date : 2025-12-29 DOI: 10.1038/s44161-025-00757-4
Khaled Rjoob, Kathryn A. McGurk, Sean L. Zheng, Lara Curran, Mahmoud Ibrahim, Lingyao Zeng, Vladislav Kim, Shamin Tahasildar, Soodeh Kalaie, Deva S. Senevirathne, Parisa Gifani, Vladimir Losev, Jin Zheng, Wenjia Bai, Antonio de Marvao, James S. Ware, Christian Bender, Declan P. O’Regan
Understanding gene–disease associations is important for uncovering pathological mechanisms and identifying potential therapeutic targets. Knowledge graphs can represent and integrate data from multiple biomedical sources, but lack individual-level information on target organ structure and function. Here we develop CardioKG, a knowledge graph that integrates over 200,000 computer vision-derived cardiovascular phenotypes from biomedical images with data extracted from 18 biological databases to model over a million relationships. We used a variational graph auto-encoder to generate node embeddings from the knowledge graph to predict gene–disease associations, assess druggability and identify drug repurposing strategies. The model predicted genetic associations and therapeutic opportunities for leading causes of cardiovascular disease, which were associated with improved survival. Candidate therapies included methotrexate for heart failure and gliptins for atrial fibrillation, and the addition of imaging data enhanced pathway discovery. These capabilities support the use of biomedical imaging to enhance graph-structured models for identifying treatable disease mechanisms. Rjoob et al. develop CardioKG, a knowledge graph built on cardiac imaging traits to identify genetic associations and potential therapeutic strategies and drug repurposing opportunities for cardiovascular diseases.
了解基因与疾病的关联对于揭示病理机制和确定潜在的治疗靶点非常重要。知识图谱可以表示和整合来自多个生物医学来源的数据,但缺乏目标器官结构和功能的个体水平信息。在这里,我们开发了CardioKG,这是一个知识图谱,集成了来自生物医学图像的20多万种计算机视觉衍生的心血管表型,以及从18个生物数据库中提取的数据,以模拟超过100万种关系。我们使用变分图自编码器从知识图中生成节点嵌入,以预测基因与疾病的关联,评估药物可药性并确定药物再利用策略。该模型预测了心血管疾病主要原因的遗传关联和治疗机会,这与生存率的提高有关。候选疗法包括用于心力衰竭的甲氨蝶呤和用于房颤的格列汀,以及增强途径发现的影像数据的添加。这些功能支持使用生物医学成像来增强图结构模型,以确定可治疗的疾病机制。
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Nature cardiovascular research
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