Related Experiment Video
Updated: May 3, 2026

Determining Immune System Suppression versus CNS Protection for Pharmacological Interventions in Autoimmune Demyelination
Published on: September 12, 2016
Integrating Genomic, eQTL, and Mendelian Randomization Analyses to Identify Microglial Drug Targets in Multiple
Wu Yan1, Jiang Wen1, Wang Jianhong1
1Department of Neurology, First Affiliated Hospital of Kunming Medical University, Kunming, P. R. China.
Abstract:
Multiple sclerosis (MS) is an autoimmune disease characterised by neuroinflammation and neurodegeneration. This study investigates genetic and immunological factors in MS, focusing on microglial regulation. We analysed differentially expressed genes using RNA sequencing from MS lesions (GSE108000) and plaques (GSE227781), validated with cis-eQTL analysis, and integrated Mendelian randomisation (MR), SMR, co-localisation, methylation, and protein-protein interaction (PPI) analyses to assess causal effects on MS risk. We identified five genes-ARHGAP25, HLA-DRB1, MERTK, MS4A6A, and SYK-linked to MS susceptibility. MR revealed that elevated levels of ARHGAP25 (OR = 1.45), HLA-DRB1 (OR = 2.24), MERTK (OR = 1.10), MS4A6A (OR = 1.15), and SYK (OR = 1.13) increased MS risk. SMR confirmed a causal link between HLA-DRB1 and MS, while co-localisation analysis showed shared variants with MS for HLA-DRB1 (100%) and SYK (97.93%). Methylation analysis highlighted 10 sites within HLA-DRB1, and PPI and DrugBank analyses revealed interactions between these genes and multiple proteins or chemicals. This study demonstrates the value of integrating genomic and eQTL data through MR to identify novel MS therapeutic targets, particularly microglial genes, offering potential new avenues for treatment.
More Related Videos
Related Concept Videos
Principles of Pharmacogenetics: Types of Genetic Variants
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu
Pharmacogenetics of Drug Metabolism: Overview
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
Pharmacogenomics: Identification of New Drug Targets
Drug Toxicity: Risk factors

