Genomic Correlation, Shared Loci, and Causal Relationship Between Bullous Pemphigoid and Atopic Dermatitis: A Large-Scale Genome-Wide Cross-Trait Analysis - PubMed Skip to main page content
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. 2024 Oct;12(10):e70022.
doi: 10.1002/mgg3.70022.

Genomic Correlation, Shared Loci, and Causal Relationship Between Bullous Pemphigoid and Atopic Dermatitis: A Large-Scale Genome-Wide Cross-Trait Analysis

Qing Wang  1   2   3 , Xuehua Wang  4 , Qizhen Zhuang  2 , Yuan Wu  2 , Junhong Zhang  2   3 , Yue Lu  3   5 , Jingjing Wu  3   5 , Juanjuan Liu  1 , Xiangyu Hu  1 , Ling Han  3   5   6   7
Affiliations

Genomic Correlation, Shared Loci, and Causal Relationship Between Bullous Pemphigoid and Atopic Dermatitis: A Large-Scale Genome-Wide Cross-Trait Analysis

Qing Wang et al. Mol Genet Genomic Med. 2024 Oct.

Abstract

Background: Bullous pemphigoid (BP) and atopic dermatitis (AD) are currently thought to be tightly related, yet studies of the mechanisms of co-morbidities are lacking.

Methods: We obtained GWAS data for BP (N = 376,274) and AD (N = 796,661) from the Finnish Genetic Research Program dataset and the UK Biobank, separately. Then, the following four analyses were performed: (1) cross-trait linkage disequilibrium score regression (LDSC) to assess the genetic correlation between BP and AD, (2) cross-phenotype association analysis (CPASSOC) to identify multiple effector loci shared by BP and AD, (3) transcriptome-wide association study (TWAS) to determine whether their cross-organizational expression patterns share genes with a common biological mechanism of relevance, and (4) bidirectional Mendelian randomization (MR) analysis to assess bidirectional causal effects of BP and AD.

Results: We found a positive genetic association between BP and AD (rg = 0.5476, p = 0.0495) as well as identified four pleiotropic loci and 59 common genes affecting BP and AD. Bidirectional MR analysis suggested that BP promotes the risk of AD.

Conclusions: We revealed a genetic link between BP and AD, which is associated with biological pleiotropy and causality. Awareness of the association between BP and AD helps dermatologists manage patients with these illnesses.

Keywords: atopic dermatitis; bullous pemphigoid; co‐morbidities; cross‐trait meta‐analysis; genome‐wide genetic correlation analysis; mendelian randomization; transcriptome‐wide association analysis.

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Conflict of interest statement

The authors declare no conflicts of interest.

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The overall design of the study.
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