MUC2 and Parkinson disease: Furthermore, polymorphisms in other microbial pattern recognition receptors and one intestinal mucin were also associated with PD risk; where PGLRYP2 rs892145 and TLR1 rs4833095 were significant in the APDR cohort, while TLR2 rs3804099 and MUC2 rs11825977 were significant in the PPMI cohort.