Genome-Wide Meta-Analysis Identifies Genetic Risk Loci for Mono- and Polyneuropathies in 983,477 Individuals
Broberg, M.; FinnGen, ; Kalso, E.; Ollila, H. M.
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Peripheral neuropathies are common neurological disorders affecting sensory, autonomic, and motor nerves, with an estimated prevalence exceeding 2% in the general population. Typical symptoms include numbness and distal limb muscle weakness, resulting from somatosensory nerve damage. Here, we investigate the genetic architecture of mono- and polyneuropathies and their relationships with comorbid traits using data from FinnGen and the UK Biobank. Our genome-wide association study (GWAS) and meta-analysis identified 48 genome-wide significant (p < 5 x 10-8) independent loci and 66 fine-mapped signals. These included associations with genes involved in neurotransmitter signaling (HTR3A), immune function (HLA-DQB1, BCL11A), extracellular matrix remodeling (COL11A1, ADAMTS17, LOXL4), axon guidance and neural development (DCC, ETV1, NEGR1), and carpal tunnel syndrome (DIRC3). Phenome-wide association studies (PheWAS), genetic correlation, and Mendelian randomization analyses supported shared genetic links with sleep problems, chronic pain, and psychiatric disorders. Together, our results highlight a strong polygenic basis for neuropathies and confirm their complex comorbid relationships with sleep, pain, psychiatric, and autoimmune traits. Author approvalAll authors have seen and approved the manuscript.
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