Redox and biometal status in Wistar rats after subacute exposure to fluoride and selenium counter-effects

Arh Hig Rada Toksikol. 2022 Sep 30;73(3):207-222. doi: 10.2478/aiht-2022-73-3650. eCollection 2022 Sep 1.

Abstract
in English, Croatian

This study aimed to investigate the effect of 150 mg/L sodium fluoride (NaF) on redox status parameters and essential metals [copper (Cu), iron (Fe), and zinc (Zn)] in the blood, liver, kidney, brain, and spleen of Wistar rats and to determine the protective potential of selenium (Se) against fluoride (F-) toxicity. Male Wistar rats were randomly distributed in groups of five (n=5) receiving tap water (control) or water with NaF 150 mg/L, NaF 150 mg/L + Se 1.5 mg/L, and Se 1.5 mg/L solutions ad libitum for 28 days. Fluorides caused an imbalance in the redox and biometal (Cu, Fe, and Zn) status, leading to high superoxide anion (O2 .-) and malondialdehyde (MDA) levels in the blood and brain and a drop in superoxide dismutase (SOD1) activity in the liver and its increase in the brain and kidneys. Se given with NaF improved MDA, SOD1, and O2 .- in the blood, brain, and kidneys, while alone it decreased SH group levels in the liver and kidney. Biometals both reduced and increased F- toxicity. Further research is needed before Se should be considered as a promising strategy for mitigating F- toxicity.

Cilj ovog istraživanja bio je utvrditi djelovanje 150 mg/L natrijevog fluorida (NaF) na redoks-status i koncentracije esencijalnih elemenata [bakar (Cu), željezo (Fe) i cink (Zn)] u krvi, jetri, bubrezima, mozgu i slezeni Wistar štakora te mogući zaštitni učinak selena (Se) od toksičnosti prouzročene fluoridom (F-). Mužjaci Wistar štakora nasumično su razvrstani u četiri skupine (n=5), nakon čega su 28 dana konzumirali običnu vodu ili vodu s otopinom NaF 150 mg/L, NaF 150 mg/L + Se 1,5 mg/L ili Se 1,5 mg/L. Izloženost fluoridu dovela je do poremećaja redoks-parametara i koncentracija istraživanih biometala. Utvrđene su povišene razine superoksid aniona (O2 .-) i malondialdehida (MDA) u krvi i mozgu, smanjena aktivnost superoksid dismutaze (SOD1) u jetri te njezin porast u mozgu i bubrezima. Nadomjesni Se u kombinaciji s NaF pozitivno je utjecao na razine MDA, SOD1 i O2 .- u krvi, mozgu i bubrezima, a sâm Se smanjio je razine SH skupina u jetri i bubrezima. Izloženost fluoridu uzrokovala je sniženje, ali i porast koncentracija biometala. Nužna su dodatna istraživanja kako bi se ispitali antioksidacijski učinci Se na toksičnost izazvanu F-.

Keywords: Cu; Fe; MDA; NaF; O2.-; SOD1; Se; Zn; natrijev fluorid; oksidacijski stres; oxidative stress; sodium fluoride; subacute toxicity; subakutna toksičnost.

MeSH terms

  • Animals
  • Copper
  • Fluorides / pharmacology
  • Iron
  • Male
  • Malondialdehyde / pharmacology
  • Oxidation-Reduction
  • Oxidative Stress
  • Rats
  • Rats, Wistar
  • Selenium*
  • Sodium Fluoride / toxicity
  • Superoxide Dismutase / metabolism
  • Superoxide Dismutase / pharmacology
  • Superoxide Dismutase-1 / pharmacology
  • Superoxides / pharmacology
  • Trace Elements*
  • Water
  • Zinc

Substances

  • Trace Elements
  • Water
  • Superoxides
  • Malondialdehyde
  • Copper
  • Sodium Fluoride
  • Iron
  • Superoxide Dismutase
  • Superoxide Dismutase-1
  • Selenium
  • Zinc
  • Fluorides