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Hyperglycemia exacerbates cadmium-induced glomerular nephrosis.

Mengyang Li1, Xiuxiu Liu1, Zengli Zhang1

  • 1School of Public Health, 74565Soochow University, Suzhou, China.

Toxicology and Industrial Health
|August 28, 2021
PubMed
Summary

Cadmium (Cd) exposure combined with high blood sugar (hyperglycemia) significantly increases the risk of kidney damage, particularly to glomerular cells. This dual exposure exacerbates toxicity compared to cadmium exposure alone.

Keywords:
Cadmiumdiabetic nephropathyglomerular nephrosishyperglycemiapodocytes

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Area of Science:

  • Environmental Toxicology
  • Nephrology
  • Diabetology

Background:

  • Cadmium (Cd) exposure is linked to diabetic nephropathy, but the interaction is unclear.
  • Understanding how hyperglycemia affects Cd toxicity to kidney cells is crucial.

Purpose of the Study:

  • To investigate the combined effects of elevated glucose and cadmium on glomerular cells.
  • To assess Cd-induced toxicity in both in vitro and in vivo models under hyperglycemic conditions.

Main Methods:

  • In vitro: Human podocytes exposed to low or high glucose with or without CdCl2.
  • In vivo: Diabetic mice (streptozotocin-induced) treated with CdCl2 or saline for 24 weeks.
  • Assays included CCK-8, ROS, apoptosis, mitochondrial potential, body weight, blood urea nitrogen, and renal histology.

Main Results:

  • High glucose potentiated Cd-induced injury to human podocytes in vitro.
  • In vivo, diabetic mice exposed to Cd showed reduced body weight and increased blood urea nitrogen.
  • Cd exposure in diabetic mice led to significant histopathological renal changes, including collagen accumulation.

Conclusions:

  • Hyperglycemia exacerbates cadmium toxicity to glomerular podocytes.
  • Combined exposure to hyperglycemia and cadmium significantly increases the risk of glomerular nephrosis.
  • These findings highlight the critical interplay between environmental toxins and metabolic disease in kidney damage.