相关实验视频

Updated: May 5, 2026

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Noninvasive Assessment of Cardiac Abnormalities in Experimental Autoimmune Myocarditis by Magnetic Resonance Microscopy Imaging in the Mouse

Published on: June 20, 2014

线粒体损伤与早期免疫反应有关,包括身体肌肉炎

Felix Kleefeld^1,2, Emily Cross³, Daniel Lagos³

¹Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt, Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Neurology, 10117 Berlin, Germany.

Brain : a journal of neurology

|April 7, 2025

概括

具有线粒体病理 (PM-Mito) 的多粒体炎和包含体肌肉炎 (IBM) 分享线粒体缺陷,包括mtDNA删除和功能障碍. 这些早期线粒体异常先于后来的疾病特征,这表明PM-Mito是IBM的早期形式.

科学领域:

线粒体病理学和炎症性肌肉病变.
肌肉疾病的分子和细胞生物学

背景情况:

带有线粒体病理的多聚质炎 (PM-Mito) 是一种异常性炎症性肌肉病变.
PM-Mito与包括体肌炎 (IBM) 有分子相似之处,这表明它是IBM早期的前身.
线粒体功能障碍与IBM的发病有关.

研究的目的:

在组织学,超结构和分子水平上对PM-Mito中的线粒体表型进行表征.
在PM-Mito和IBM中调查线粒体功能障碍和炎症之间的相互作用.
建立PM-Mito作为IBM频谱的一部分.

主要方法:

从27名PM-Mito和27名IBM患者的骨肌肉活检的组织学和超结构分析.
使用qPCR,远程PCR和单分子测序评估线粒体DNA (mtDNA) 拷贝数和删除.
蛋白质基因分析,免疫染,RNA测序,以及测量血清中的无细胞mtDNA (cf-mtDNA).

主要成果:

无论是PM-Mito还是IBM都表现出广泛的线粒体异常,包括COX阴性纤维和超结构缺陷.
减少mtDNA拷贝数和大规模的mtDNA删除在PM-Mito中存在,类似于IBM.
激活cGAS/STING炎症通路和升高cf-mtDNA表明与mtDNA泄漏相关的炎症.

结论:

线粒体功能障碍,mtDNA删除,枯竭和内线粒体膜缺陷是PM-Mito和IBM的关键特征.
这些线粒体异常先于在IBM晚期看到的特征性组织重塑和T细胞透.
线粒体相关的炎症,可能是由释放的mtDNA驱动的,在这种IBM频谱疾病的发病过程中起着重要作用.

关键词:

在IBM-SD中使用IBM-SD.这就是PM-Mito.线粒体中的线粒体.具有线粒体病理学的多聚质炎.

更多相关视频

In Situ Immunofluorescent Staining of Autophagy in Muscle Stem Cells

In Situ Immunofluorescent Staining of Autophagy in Muscle Stem Cells

Published on: June 12, 2017

Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils

Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils

Published on: September 28, 2019

相关概念视频

Translocation of Proteins into the Mitochondria

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...

Myocarditis I: Introduction

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...

Cellular Injury I: Introduction

Cellular Injury I: Introduction

Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...

Myasthenia Gravis ll: Pathophysiology

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...