Related Experiment Video
Updated: Apr 24, 2026
06:07
Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
Published on: March 28, 2025
1.3K
Linking Mitochondrial Dysfunction to the Immune Microenvironment in HFpEF: An Integrated Bioinformatics and
Yingying Xie1,2, Haoming He1, Yike Li1
1Department of Cardiology, China-Japan Friendship Hospital (Institute of Clinical Medical Sciences), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
Immunity, Inflammation and Disease
|April 23, 2026
Summary
Two key mitochondrial genes, CHCHD1 and EFHD1, are linked to heart failure with preserved ejection fraction (HFpEF). Reduced EFHD1 expression correlates with increased macrophage infiltration and heart failure severity, suggesting new therapeutic targets.
Area of Science:
- Cardiology
- Mitochondrial Biology
- Immunology
Background:
- Heart failure with preserved ejection fraction (HFpEF) pathogenesis involves poorly understood mitochondrial dysfunction and immune infiltration.
- Elucidating the relationship between mitochondrial genes and immune response is crucial for understanding HFpEF.
Purpose of the Study:
- To investigate the interplay between mitochondrial dysfunction and immune cell infiltration in HFpEF.
- To identify key mitochondrial genes regulating these processes in HFpEF.
Main Methods:
- Integrated bioinformatics analysis of human HFpEF datasets (GSE108904, GSE126062).
- Differential gene expression analysis, Weighted Gene Co-expression Network Analysis (WGCNA), and MitoCarta3.0 database utilization.
- Experimental validation in peripheral blood mononuclear cells (PBMCs) from HFpEF patients and in HFpEF mouse/cell models.
Main Results:
- Identified CHCHD1 and EFHD1 as hub mitochondrial genes associated with HFpEF.
- Observed increased macrophage infiltration in HFpEF, negatively correlated with CHCHD1 and EFHD1 expression.
- Confirmed decreased EFHD1 expression in HFpEF PBMCs, mouse hearts, and cellular inflammation models; EFHD1 negatively correlated with HF indicators (NT-proBNP, E/e').
Conclusions:
- CHCHD1 and EFHD1 are key mitochondrial genes linking mitochondrial dysfunction to immune dysregulation in HFpEF.
- These findings offer novel insights into HFpEF molecular mechanisms.
- CHCHD1 and EFHD1 represent potential therapeutic targets for HFpEF.
Related Concept Videos
01:29Heart Failure II: Pathophysiology
1.5K
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
1.5K
01:17Pathophysiology of Heart Failure
4.5K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
4.5K
01:21Myocarditis I: Introduction
642
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...
642
01:27Heart Failure I: Introduction
1.3K
Heart failure refers to a clinical syndrome caused by structural or functional cardiac disorders that prevent the heart from pumping an adequate amount of blood to meet the body's metabolic needs. This condition often arises from myocardial infarction or ischemia, leading to decreased cardiac output, reduced tissue perfusion, impaired gas exchange, fluid volume imbalance, and decreased functional ability.Heart failure can result from disruptions in the mechanisms that regulate cardiac output...
1.3K
01:26Imbalances in Cardiac Output
3.3K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
3.3K
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
793
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
793