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Chapleau RR, Martin CA, Hughes SR, Baldwin JC, Sladky J, Sherman PM, Grinkemeyer M. Apolipoprotein E promoter genotypes are not associated with white matter hyperintensity development in high-altitude careers. BMC Res Notes 2019; 12:630. [PMID: 31551090 PMCID: PMC6760100 DOI: 10.1186/s13104-019-4654-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 09/17/2019] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE This study sought to determine if there is an association between variants in the apolipoprotein E (ApoE) promoter regions and development of white matter hyperintensities (WMH) in military subjects who have been exposed to high altitude. In an earlier study, we found that ApoE status did not correlate with WMH development, and here we hypothesized that regulation of APOE protein expression may be protective. RESULTS Our cohort of 92 subjects encountered altitude exposures above 25,000 feet mean sea level through their occupations as pilots or altitude chamber technicians. Using Taqman-style polymerase chain reaction genotyping and t-tests and two-way analyses of variance we found no significant association between ApoE promoter genotypes and the presence, volume, or quantity of WMHs after high altitude exposure. Taken together, the observations that neither ApoE genotype status nor promoter status are associated with WMH properties, we believe that the mechanism of action for developing WMH does not derive from ApoE, nor would therapies for ApoE-mediated neurodegeneration likely benefit high altitude operators.
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Affiliation(s)
- Richard R Chapleau
- Aeromedical Research Department, Applied Technology and Genomics Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA.
| | - CharLee A Martin
- Aeromedical Research Department, Applied Technology and Genomics Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA
| | - Summer R Hughes
- Aeromedical Research Department, Applied Technology and Genomics Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA
| | - James C Baldwin
- Aeromedical Research Department, Applied Technology and Genomics Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA
| | - John Sladky
- Aeromedical Research Department, Operational Health and Performance Research Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA.,59th Medical Wing, Department of Neurology, Joint Base San Antonio-Lackland, San Antonio, TX, USA
| | - Paul M Sherman
- Aeromedical Research Department, Operational Health and Performance Research Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA.,59th Medical Wing, Department of Neuroradiology, Joint Base San Antonio-Lackland, San Antonio, TX, USA
| | - Michael Grinkemeyer
- Aeromedical Research Department, Applied Technology and Genomics Division, Wright-Patterson AFB, U.S. Air Force School of Aerospace Medicine, Dayton, OH, USA
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