Essential tremor and the common LRRK2 G2385R variant

Parkinsonism Relat Disord. 2008 Nov;14(7):569-71. doi: 10.1016/j.parkreldis.2007.12.003. Epub 2008 Mar 3.

Abstract

Co-existence of Parkinson's disease (PD) and essential tremor (ET) suggests a possible overlapping pathophysiology between these two conditions. PD patients with leucine-rich repeat kinase-2 (LRRK2) mutations have been reported to present initially with ET. A common LRRK2 Gly2385Arg variant has been widely shown to be associated with a two fold increased risk of PD in various Asian populations. We analyzed the Gly2385Arg variant in a cohort of ET and controls. A total of 419 subjects comprising of 172 ET and 247 controls were included. The mean age, age at onset of ET, and age of controls were 52.1+/-19.6, 41.8+/-21.6, and 62.2+/-11.6 years, comprising of 53.0% and 54.3% men, respectively. The Gly2385Arg variant was demonstrated in 5/172 (2.9%) ET patients compared to 10/247 (4.0%) of controls (odds ratio=0.72, 95% CI 0.24, 2.1, p=0.6). All the Gly2385Arg carriers were heterozygotes. The LRRK2 Gly2385Arg variant is not a significant risk factor for ET in our population.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Arginine / genetics*
  • Cohort Studies
  • Confidence Intervals
  • DNA Mutational Analysis
  • Essential Tremor / genetics*
  • Female
  • Gene Frequency
  • Genetic Predisposition to Disease*
  • Genotype
  • Glycine / genetics*
  • Humans
  • Leucine-Rich Repeat Serine-Threonine Protein Kinase-2
  • Male
  • Middle Aged
  • Odds Ratio
  • Protein Serine-Threonine Kinases / genetics*

Substances

  • Arginine
  • LRRK2 protein, human
  • Leucine-Rich Repeat Serine-Threonine Protein Kinase-2
  • Protein Serine-Threonine Kinases
  • Glycine