Genetic correlation and causality of cancers and Parkinson's disease
Senkevich, K.; Bandres Ciga, S.; Yu, E.; Liyanage, U. E.; International Parkinson Disease Genomics Consortium (IPDGC), ; Noyce, A. J.; Gan-Or, Z.
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Background and objectivesMost cancers appear with reduced frequency in Parkinsons disease (PD), but the prevalence of melanoma and brain cancers are often reported to be increased. Shared genetic architecture and causal relationships to explain these associations have not been fully explored. MethodsLinkage disequilibrium score regression (LDSC) was applied for five cancer studies with available genome-wide association studies (GWAS) summary statistics to examine genetic correlations with PD. Additionally, we used GWAS summary statistics of 15 different types of cancers as exposures and two-sample Mendelian randomization to study the causal relationship with PD (outcome). ResultsLDSC analysis revealed a potential genetic correlation between PD and melanoma, breast cancer and prostate cancer. There was no evidence to support a causal relationship between the studied cancers and PD. ConclusionsOur results suggest shared genetic architecture between PD and melanoma, breast, and prostate cancers, but no obvious causal relationship between cancers and PD.
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