Meta-analysis of the association of prosaposin polymorphisms rs4747203 and rs885828 with risk of Parkinson’s disease

Previous research has established a connection between polymorphisms rs4747203 and rs885828 in the prosaposin (PSAP) gene and an increased risk of Parkinson’s disease (PD). However, other studies have found no significant difference in risk compared to the general population.

To evaluate the current evidence linking rs4747203 and rs885828 to PD risk, we conducted a comprehensive search of PubMed, the Web of Science, Embase, and the Cochrane Library for relevant studies up until May 2023. In addition, we analyzed data from the publicly available “PD Variant Browser”. We performed a meta-analysis using Stata 17.0 to synthesize the findings from the selected studies.

Our meta-analysis, which included data from six published studies and the public database, revealed no significant association between PD risk and either rs4747203 [OR (95% CI) = 0.99 (0.93–1.05), I² = 90.3%, P = 0.635] or rs885828 [OR (95% CI) = 1.01 (0.95–1.07), I² = 90.7%, P = 0.773]. These results remained consistent when examining subgroups of individuals within or outside of Asia.

The available evidence does not support an association between the genotype at rs4747203 or rs885828 and the risk of PD.