Causal association between circulating inflammatory cytokines and intracranial aneurysm and subarachnoid hemorrhage

Author:

He Qiang1ORCID,Wang Wenjing2,Xiong Yang3,Tao Chuanyuan1,Ma Lu1,You Chao1

Affiliation:

1. Department of Neurosurgery, West China Hospital Sichuan University Chengdu Sichuan China

2. Department of Pharmacy, Institute of Metabolic Diseases and Pharmacotherapy, West China Hospital Sichuan University Chengdu Sichuan China

3. Department of Urology, West China Hospital Sichuan University Chengdu Sichuan China

Abstract

AbstractBackground and purposeThe causal association between inflammatory cytokines and the development of intracranial aneurysm (IA), unruptured IA (uIA) and subarachnoid hemorrhage (SAH) lacks clarity.MethodsThe summary‐level datasets for inflammatory cytokines were extracted from a genome‐wide association study of the Finnish Cardiovascular Risk in Young Adults Study and the FINRISK survey. The summary statistics datasets related to IA, uIA and SAH were obtained from the genome‐wide association study meta‐analysis of the International Stroke Genetics Consortium and FinnGen Consortium. The primary method employed for analysis was inverse variance weighting (false discovery rate), supplemented by sensitivity analyses to address pleiotropy and enhance robustness.ResultsIn the International Stroke Genetics Consortium, 10, six and eight inflammatory cytokines exhibited a causal association with IA, uIA and SAH, respectively (false discovery rate, p < 0.05). In FinnGen datasets, macrophage Inflammatory Protein‐1 Alpha (MIP_1A), MIP_1A and interferon γ‐induced protein 10 (IP_10) were verified for IA, uIA and SAH, respectively. In the reverse Mendelian randomization analysis, the common cytokines altered by uIA and SAH were vascular endothelial growth factor (VEGF), MIP_1A, IL_9, IL_10 and IL_17, respectively. The meta‐analysis results show that MIP_1A and IP_10 could be associated with the decreased risk of IA, and MIP_1A and IP_10 were associated with the decreased risk of uIA and SAH, respectively. Notably, the levels of VEGF, MIP_1A, IL_9, IL_10 and TNF_A were increased with uIA. Comprehensive heterogeneity and pleiotropy analyses confirmed the robustness of these results.ConclusionOur study unveils a bidirectional association between inflammatory cytokines and IA, uIA and SAH. Further investigations are essential to validate their relationship and elucidate the underlying mechanisms.

Funder

National Natural Science Foundation of China

Publisher

Wiley

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