Fibroblast growth factor 20 polymorphisms and haplotypes strongly influence risk of Parkinson disease.

Published

Journal Article

The pathogenic process responsible for the loss of dopaminergic neurons within the substantia nigra of patients with Parkinson disease (PD) is poorly understood. Current research supports the involvement of fibroblast growth factor (FGF20) in the survival of dopaminergic cells. FGF20 is a neurotrophic factor that is preferentially expressed within the substantia nigra of rat brain. The human homologue has been mapped to 8p21.3-8p22, which is within an area of PD linkage revealed through our published genomic screen. To test whether FGF20 influences risk of PD, we genotyped five single-nucleotide polymorphisms (SNPs) lying within the FGF20 gene, in a large family study. We analyzed our sample (644 families) through use of the pedigree disequilibrium test (PDT), the genotype PDT, the multilocus-genotype PDT, and the family-based association test to assess association between risk of PD and alleles, genotypes, multilocus genotypes, and haplotypes. We discovered a highly significant association of PD with one intronic SNP, rs1989754 (P=.0006), and two SNPs, rs1721100 (P=.02) and ss20399075 (P=.0008), located in the 3' regulatory region in our overall sample. Furthermore, we detected a haplotype (A-G-C-C-T) that is positively associated with risk of PD (P=.0003), whereas a second haplotype (A-G-G-G-C) was found to be negatively associated with risk of PD (P=.0009). Our results strongly support FGF20 as a risk factor for PD.

Full Text

Duke Authors

Cited Authors

  • van der Walt, JM; Noureddine, MA; Kittappa, R; Hauser, MA; Scott, WK; McKay, R; Zhang, F; Stajich, JM; Fujiwara, K; Scott, BL; Pericak-Vance, MA; Vance, JM; Martin, ER

Published Date

  • June 2004

Published In

Volume / Issue

  • 74 / 6

Start / End Page

  • 1121 - 1127

PubMed ID

  • 15122513

Pubmed Central ID

  • 15122513

International Standard Serial Number (ISSN)

  • 0002-9297

Digital Object Identifier (DOI)

  • 10.1086/421052

Language

  • eng

Conference Location

  • United States