Association of neurobehavioral performance with R2* in the caudate nucleus of asymptomatic welders

Eun Young Lee, Paul J. Eslinger, Michael R. Flynn, Daymond Wagner, Guangwei Du, Mechelle M. Lewis, Lan Kong, Richard B. Mailman, Xuemei Huang

Research output: Research - peer-reviewArticle

Abstract

Objectives Welding fumes contain several metals including manganese (Mn) and iron (Fe) that may affect the nervous system. Previous studies of potential welding-related neurotoxicity have focused primarily on Mn exposure. The current study examined neurobehavioral and brain imaging changes in asymptomatic welders and their associations with both Mn and Fe exposure measurements. Methods Data were obtained from subjects with (n = 46) and without (controls; n = 31) a history of welding exposure. Occupational questionnaires estimated recent (HrsW; welding hours and E90; cumulative exposure, past 90 days) and lifetime (YrsW; total welding years and ELT; cumulative exposure, lifetime) exposure. Brain MRI pallidal index (PI), R1 (1/T1), and R2* (1/T2*) were measured to estimate Mn and Fe concentrations in the basal ganglia [caudate nucleus (CN), putamen, and globus pallidus], amygdala, and hippocampus. Comprehensive neuropsychological tests were conducted to examine behavioral differences between welders and controls. Correlation analyses were conducted between neuropsychological tests and those exposure measurements that showed significant group differences. Results Compared to controls, welders had significantly higher R2* in the CN and lower performance on the Phonemic Fluency test. Correlation analyses revealed that welders’ Phonemic Fluency scores were inversely associated with R2* in the CN, but not with the PI or R1 in any brain region of interest studied. Discussion The results showed that neurobehavioral performance for the asymptomatic welders in our study was worse than individuals who had not welded, and suggest the differences may be associated with higher Fe accumulation in the CN.

LanguageEnglish (US)
Pages66-74
Number of pages9
JournalNeuroToxicology
Volume58
DOIs
StatePublished - Jan 1 2017

Fingerprint

Welding
Caudate Nucleus
Manganese
Brain
Neuropsychological Tests
Globus Pallidus
Putamen
Amygdala
Basal Ganglia
Neuroimaging
Nervous System
Hippocampus
Iron
Metals
Surveys and Questionnaires
Fumes
Neurology
Magnetic resonance imaging
Imaging techniques

Keywords

  • Basal ganglia
  • Caudate nucleus
  • Cognitive performance
  • Iron accumulation
  • Phonemic fluency
  • Welders

ASJC Scopus subject areas

  • Neuroscience(all)
  • Toxicology

Cite this

Lee, E. Y., Eslinger, P. J., Flynn, M. R., Wagner, D., Du, G., Lewis, M. M., ... Huang, X. (2017). Association of neurobehavioral performance with R2* in the caudate nucleus of asymptomatic welders. NeuroToxicology, 58, 66-74. DOI: 10.1016/j.neuro.2016.11.007

Association of neurobehavioral performance with R2* in the caudate nucleus of asymptomatic welders. / Lee, Eun Young; Eslinger, Paul J.; Flynn, Michael R.; Wagner, Daymond; Du, Guangwei; Lewis, Mechelle M.; Kong, Lan; Mailman, Richard B.; Huang, Xuemei.

In: NeuroToxicology, Vol. 58, 01.01.2017, p. 66-74.

Research output: Research - peer-reviewArticle

Lee, EY, Eslinger, PJ, Flynn, MR, Wagner, D, Du, G, Lewis, MM, Kong, L, Mailman, RB & Huang, X 2017, 'Association of neurobehavioral performance with R2* in the caudate nucleus of asymptomatic welders' NeuroToxicology, vol 58, pp. 66-74. DOI: 10.1016/j.neuro.2016.11.007
Lee, Eun Young ; Eslinger, Paul J. ; Flynn, Michael R. ; Wagner, Daymond ; Du, Guangwei ; Lewis, Mechelle M. ; Kong, Lan ; Mailman, Richard B. ; Huang, Xuemei. / Association of neurobehavioral performance with R2* in the caudate nucleus of asymptomatic welders. In: NeuroToxicology. 2017 ; Vol. 58. pp. 66-74
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