Toxins and narcolepsy
Type of Spiritual Experience
A description of the experience
Environ Res. 2010 Aug;110(6):565-70. doi: 10.1016/j.envres.2010.05.002. Epub 2010 Jun 1.
Environmental toxins and risk of narcolepsy among people with HLA DQB1*0602. Ton TG, Longstreth WT Jr, Koepsell TD. Neuroepidemiology Group, University of Washington, Seattle, WA, USA. email@example.com
One etiologic model for narcolepsy suggests that some environmental toxins selectively and irreversibly destroy hypocretin-producing cells in individuals with human leukocyte antigen (HLA) DQB1(*)0602.
Between 2001 and 2005, the authors conducted a population-based case-control study in King County, Washington to examine narcolepsy risk in relation to toxins found in jobs, hobbies, and other non-vocational activities.
Sixty-seven cases and 95 controls were enrolled; all were between ages 18 and 50 and positive for HLA DQB1(*)0602. All were administered in-person interviews about jobs, hobbies or other non-vocational activities before age 21. All analyses were adjusted for African-American race and income.
Risk increased significantly for jobs involving heavy metals (odds ratio [OR]=4.7; 95% confidence interval [CI]: 1.5, 14.5) and for highest levels of exposure to woodwork (OR: 3.0; 95% CI: 1.0, 8.9), fertilizer (OR=3.1; 95% CI: 1.1, 9.1), and bug or weed killer (OR=4.5; 95% CI: 1.5, 13.4).
Associations were of borderline significance for activities involving ceramics, pesticides, and painting projects.
Significant dose-response relationships were evident for jobs involving metals (p<0.03), paints (p<0.03), and bug or weed killer (p<0.02). Additional studies are needed to replicate these findings and continue the search for specific toxins that could damage hypocretin neurons in genetically susceptible people.
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