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Updated: Jun 27, 2025
Isolation of Functional Cardiac Immune Cells
Published on: December 5, 2011
Causal role of circulating inflammatory cytokines in cardiac diseases, structure and function
Weiqiang Ruan1, Xiaoqin Zhou2, Huizhen Liu3
1Department of Cardiovascular Surgery, West China Hospital, Sichuan University, #37 Guoxue Alley, Wuhou District, Chengdu, Sichuan Province 610041, PR China.
Insights
Mendelian randomization identified specific inflammatory proteins causally linked to cardiovascular disease (CVD) risk and cardiac remodeling. These findings highlight potential therapeutic targets for CVD prevention and treatment.
Area of Science:
- Genetics
- Immunology
- Cardiology
Background:
- Inflammation plays a role in cardiovascular disease (CVD) pathogenesis, but causal links of specific inflammatory cytokines are not fully understood.
- Mendelian randomization (MR) offers a robust approach to investigate etiological insights into CVD, overcoming limitations of traditional research methods.
Purpose of the Study:
- To investigate the causal relationships between 91 circulating inflammatory proteins and various CVD outcomes and cardiac remodeling.
- To identify specific inflammatory cytokines that may serve as therapeutic targets for CVD prevention and treatment.
Main Methods:
- A large-scale Mendelian randomization (MR) study utilizing summary-level genetic data.
- Analysis of 91 inflammatory proteins in relation to diverse CVD outcomes including coronary artery disease, stroke, atrial fibrillation, heart failure, and cardiac remodeling parameters.
- Primary analysis employed the inverse-variance weighted method, supplemented by several sensitivity analyses.
Main Results:
- Hepatocyte growth factor (HGF) showed a causal link with increased risk for any stroke and ischemic stroke.
- Programmed cell death 1 ligand 1 (PD-L1) was associated with a reduced risk of atrial fibrillation.
- Several proteins (CCL20, CDCP1, Flt3L, IL-10RA) were identified as causal risk factors for coronary artery disease, while others (LIF, ST1A1) demonstrated protective effects. IL-4 and LIF-R were linked to changes in right heart function.
Conclusions:
- The study identifies specific circulating inflammatory cytokines with potential causal roles in CVD development and progression.
- These findings nominate novel targets for the development of CVD treatments and preventative strategies.
- Further research is needed to elucidate underlying mechanisms and facilitate clinical translation.
Background:
Inflammation is implicated in cardiovascular disease (CVD) pathogenesis, but causal roles of specific circulating inflammatory cytokines remain unclear. Mendelian randomization (MR) studies are well-poised to provide etiological insights beyond constraints of conventional research.
Methods:
We conducted a large-scale MR study to investigate potential causal relationships of 91 inflammatory proteins with CVD outcomes and cardiac remodeling using summary-level genetic data. Outcomes included coronary artery disease, myocardial infarction, stroke, atrial fibrillation, heart failure, abdominal aortic aneurysm, deep vein thrombosis of lower extremities, pulmonary embolism, cardiac structure and functional parameters. Inverse-variance weighted analysis was undertaken as the primary analysis, with several sensitivity analyses applied.
Results:
Hepatocyte growth factor (HGF) demonstrated a causal relationship with increased susceptibility to both any stroke (OR 1.111; 95 % CI 1.044 - 1.183; P = 9.50e-04) and ischemic stroke (OR 1.121; 95 % CI 1.047 - 1.200; P = 1.04e-03). Programmed cell death 1 ligand 1 (PD-L1) was negatively associated with atrial fibrillation risk (OR 0.936, 95 % CI 0.901 - 0.973; P = 7.69e-04). CCL20, CDCP1, Flt3L and IL-10RA were identified as causal coronary artery disease risk factors, while LIF and ST1A1 had protective effects. IL-4 and LIF-R demonstrated causal links with right heart functional changes.
Conclusions:
Our MR study nominates specific circulating inflammatory cytokines as potential targets for CVD treatment and prevention. Further research into mechanisms and clinical translation are warranted.
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