A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults.

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  • Additional Information
    • Subject Terms:
    • Author-Supplied Keywords:
      bone lead KXRF
      brain metabolism
      lead
      proton magnetic resonance spectroscopy
    • Abstract:
      BACKGROUND: Lead is known to be a health hazard to the human brain and nervous system based on data from epidemiologic studies. However, few studies have examined the mechanism or biochemical changes caused by lead in the human brain, although recently some have used magnetic resonance spectroscopy (MRS) to test brain metabolism in vivo. OBJECTIVES: In this study, we used 3-T MRS to investigate brain metabolism in workers chronically exposed to lead and matched nonexposed controls. MATERIALS AND METHODS: Twenty-two workers at a lead paint factory served as chronically exposed subjects of this study. These workers did not have any clinical syndromes. Eighteen age- and sexmatched nonexposed healthy volunteers served as controls. We measured blood and bone lead and used a 3-T MRS to measure their levels of brain N-acetyl aspartate (NAA), choline (Cho), and total creatine (tCr). A structural questionnaire was used to collect demographic, work, and health histories and information about their life habits. RESULTS: All the MRS measures were lower in the lead-exposed group. Increased blood and bone lead levels correlated with declines in Cho:tCr ratios, especially in the occipital lobe, where changes in all gray, subcortical, and white matter were significant. Increases in blood and patella lead in every layer of the frontal lobe correlated with significant decreases in NAA:tCr ratios. One of the strongest regression coefficients was -0.023 (SE = 0.005, p < 0.001), which was found in the NAA:tCr ratio of frontal gray matter. DISCUSSION: We conclude that chronic exposure to lead might upset brain metabolism, especially NAA:tCr and Cho:tCr ratios. Brain NAA and Cho are negatively correlated to blood and bone lead levels, suggesting that lead induces neuronal and axonal damage or loss. The most significant changes occurred in frontal and occipital lobes, areas in which previous neurobehavioral studies have shown memory and visual performance to be adversely affected by lead toxicity. [ABSTRACT FROM AUTHOR]
    • Abstract:
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    • ISSN:
      0091-6765
    • Accession Number:
      10.1289/ehp.0800187
    • Accession Number:
      43302932
  • Citations
    • ABNT:
      TSYH-JYI HSIEH et al. A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults. Environmental Health Perspectives, [s. l.], v. 117, n. 6, p. 941–945, 2009. DOI 10.1289/ehp.0800187. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=hch&AN=43302932. Acesso em: 1 dez. 2020.
    • AMA:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu, Hung-Yi Chuang. A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults. Environmental Health Perspectives. 2009;117(6):941-945. doi:10.1289/ehp.0800187
    • APA:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu, & Hung-Yi Chuang. (2009). A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults. Environmental Health Perspectives, 117(6), 941–945. https://doi.org/10.1289/ehp.0800187
    • Chicago/Turabian: Author-Date:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu, and Hung-Yi Chuang. 2009. “A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults.” Environmental Health Perspectives 117 (6): 941–45. doi:10.1289/ehp.0800187.
    • Harvard:
      Tsyh-Jyi Hsieh et al. (2009) ‘A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults’, Environmental Health Perspectives, 117(6), pp. 941–945. doi: 10.1289/ehp.0800187.
    • Harvard: Australian:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu & Hung-Yi Chuang 2009, ‘A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults’, Environmental Health Perspectives, vol. 117, no. 6, pp. 941–945, viewed 1 December 2020, .
    • MLA:
      Tsyh-Jyi Hsieh, et al. “A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults.” Environmental Health Perspectives, vol. 117, no. 6, June 2009, pp. 941–945. EBSCOhost, doi:10.1289/ehp.0800187.
    • Chicago/Turabian: Humanities:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu, and Hung-Yi Chuang. “A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults.” Environmental Health Perspectives 117, no. 6 (June 2009): 941–45. doi:10.1289/ehp.0800187.
    • Vancouver/ICMJE:
      Tsyh-Jyi Hsieh, Yi-Chun Chen, Chun-Wei Li, Gin-Chang Liu, Yu-Wen Chiu, Hung-Yi Chuang. A Proton Magnetic Resonance Spectroscopy Study of the Chronic Lead Effect on the Basal Ganglion and Frontal and Occipital Lobes in Middle-Age Adults. Environmental Health Perspectives [Internet]. 2009 Jun [cited 2020 Dec 1];117(6):941–5. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=hch&AN=43302932