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Related Experiment Video

Updated: Jun 14, 2025

A Data-Driven Approach to Quantifying Immune States in Sepsis
07:42

A Data-Driven Approach to Quantifying Immune States in Sepsis

Published on: February 7, 2025

150

[Causal association between immune cells and sepsis: a based on Mendelian randomization method study].

Qiushuang Yu1, Lingxu Li1, Yina Tao1

  • 1Department of Critical Care Medicine, the First Affiliated Hospital of Bengbu Medical University, Bengbu 233004, Anhui, China.

Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
|September 6, 2024
PubMed
Summary

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Mendelian randomization identified immune cell phenotypes causally linked to sepsis. Specifically, BAFF-R on IgD- CD38br expression shows a protective effect against sepsis 28-day mortality.

Area of Science:

  • Genetics
  • Immunology
  • Epidemiology

Context:

  • Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection.
  • Understanding the causal relationship between immune cells and sepsis is crucial for developing effective treatments.
  • Mendelian randomization (MR) offers a robust method to infer causality from observational data.

Purpose:

  • To investigate the causal associations between circulating immune cell phenotypes and various types of sepsis using a two-sample Mendelian randomization approach.
  • To identify specific immune cell phenotypes that causally influence sepsis risk and outcomes.
  • To explore potential protective immune cell markers for sepsis.

Summary:

  • This study utilized summary statistics from genome-wide association studies (GWAS) for immune cell phenotypes and sepsis data from the UK Biobank.

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  • Inverse variance weighting (IVW) was the primary MR method, with sensitivity analyses including Cochran's Q test and MR-Egger regression to assess robustness and horizontal pleiotropy.
  • After rigorous statistical correction, BAFF-R expression on IgD- CD38br cells was found to be strongly and negatively associated with 28-day mortality in sepsis patients (OR = 0.738, P_FDR = 0.044).

    • Impact:

    • The findings suggest that certain immune cell phenotypes may exert a protective effect against sepsis.
    • The identified negative correlation between BAFF-R on IgD- CD38br and sepsis mortality provides a novel target for immune modulation therapies.
    • This research contributes to a deeper understanding of the immunogenetics of sepsis and opens avenues for therapeutic interventions.