Redox status, dose and antioxidant intake in healthcare workers occupationally exposed to ionizing radiation

Natividad Sebastià, Lorena Olivares-González, Alegría Montoro, Joan Francesc Barquinero, Antonio José Canyada-Martinez, David Hervás, Pilar Gras, Juan Ignacio Villaescusa, Luis Martí-Bonmatí, Bianca Tabita Muresan, José Miguel Soriano, Juan Manuel Campayo, Joaquin Andani, Oscar Alonso, Regina Rodrigo

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The purpose of this study was to evaluate the relationship between blood redox status, dose and antioxidant dietary intake of different hospital staff groups exposed to low doses of ionizing radiation (LDIR) (Interventional Radiology and Cardiology, Radiation Oncology, and Nuclear Medicine) and non-exposed. Personal dose equivalent (from last year and cumulative), plasma antioxidant markers (total antioxidant capacity, extracellular superoxide dismutase activity, and glutathione/oxidized glutathione ratio), oxidative stress markers (nitrites and nitrates, and lipid peroxidation) and dietary intake (antioxidant capacity using ORAC values) were collected and analyzed from 28 non-exposed healthcare workers and 42 healthcare workers exposed to LDIR. Hospital staff exposed to LDIR presented a redox imbalance in blood that seems to correlate with dose. Workers from the Nuclear Medicine Unit were the most affected group with the lowest value of plasma antioxidant response and the highest value of plasma thiobarbituric acid reactive substances, TBARS (indicator of lipid peroxidation) of all four groups. Cumulative personal dose equivalent positively correlated with nitrites and negatively correlated with total antioxidant capacity in blood. The diet of healthcare workers from Nuclear Medicine Unit had higher ORAC values than the diet of non-exposed. Therefore, occupational exposure to LDIR, especially for the Nuclear Medicine Unit, seems to produce an imbalanced redox status in blood that would correlate with cumulative personal dose equivalent.

Original languageAmerican English
Article number778
Pages (from-to)1-16
Number of pages16
JournalAntioxidants
Volume9
Issue number9
DOIs
Publication statusPublished - Sep 2020

Keywords

  • Antioxidant-oxidant status
  • Ionizing radiation
  • Occupational exposure
  • Oxygen radical absorbance capacity (ORAC)
  • Personal dose equivalent

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    Sebastià, N., Olivares-González, L., Montoro, A., Barquinero, J. F., Canyada-Martinez, A. J., Hervás, D., Gras, P., Villaescusa, J. I., Martí-Bonmatí, L., Muresan, B. T., Soriano, J. M., Campayo, J. M., Andani, J., Alonso, O., & Rodrigo, R. (2020). Redox status, dose and antioxidant intake in healthcare workers occupationally exposed to ionizing radiation. Antioxidants, 9(9), 1-16. [778]. https://doi.org/10.3390/antiox9090778