Association analysis of EIF4G1 and Parkinson disease in Xinjiang Uygur and Han nationality
MEDICINE
Authors: Ma, Yu; Zheng, Daxiong; Li, Hongyan
Abstract
This study is to investigate whether the known mutations P.R1205H and P.A502V were pathogenic factors of Parkinson disease (PD) in Xinjiang Uygur and Han people.A case-control study with polymerase chain reaction-restriction fragment length polymorphism method was performed on 150 cases of PD and 130 cases of age, sex, and national-matched healthy controls for rs200221361 polymorphism analysis and Sanger sequencing. Specific mutations were chosen for further sequencing in a case-control study.The 3 variants located on the exon 10, and the rs200221361 was a nonsynonymous variant. The frequencies of rs200221361 genotype and allele between PD and control groups in Uygur and Han people showed no significant difference (for genotype, (2)=0.91, P>.05; for allele, (2)=0.91, P>.05). Statistical analysis showed that there were no differences in allele and genotype frequencies of rs200221361 genotype and allele between PD and control groups among the age, gender, or race (P>.05).P.Ala502Val and P.Arg1205H may not be pathogenic mutations to PD in Xinjiang Uygur and Han people. The polymorphism of the rs200221361 may have no association with the occurrence of PD in Uygur and Han people of Xinjiang.
Parkinson's Disease Genes VPS35 and EIF4G1 Interact Genetically and Converge on alpha-Synuclein
NEURON
Authors: Dhungel, Nripesh; Eleuteri, Simona; Li, Ling-bo; Kramer, Nicholas J.; Chartron, Justin W.; Spencer, Brian; Kosberg, Kori; Fields, Jerel Adam; Stafa, Klodjan; Adame, Anthony; Lashuel, Hilal; Frydman, Judith; Shen, Kang; Masliah, Eliezer; Gitler, Aaron D.
Abstract
Parkinson's disease (PD) is a common neurodegenerative disorder. Functional interactions between some PD genes, like PINK1 and parkin, have been identified, but whether other ones interact remains elusive. Here we report an unexpected genetic interaction between two PD genes, VPS35 and EIF4G1. We provide evidence that EIF4G1 upregulation causes defects associated with protein misfolding. Expression of a sortilin protein rescues these defects, downstream of VPS35, suggesting a potential role for sortilins in PD. We also show interactions between VPS35, EIF4G1, and alpha-synuclein, a protein with a key role in PD. We extend our findings from yeast to an animal model and show that these interactions are conserved in neurons and in transgenic mice. Our studies reveal unexpected genetic and functional interactions between two seemingly unrelated PD genes and functionally connect them to alpha-synuclein pathobiology in yeast, worms, and mouse. Finally, we provide a resource of candidate PD genes for future interrogation.