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Melamine induces autophagy in mesangial cells via enhancing ROS level

Hui Wang1, Na Gao2, Wen Li2

  • 1a College of Life Sciences and Key Laboratory of Bioactive Materials Ministry of Education, Nankai University , Tianjin , PR China and.

Toxicology Mechanisms and Methods
|September 15, 2015
PubMed
Abstract

Insights

Melamine exposure triggers autophagy in kidney cells by increasing reactive oxygen species (ROS), and this autophagy acts protectively against melamine-induced kidney damage. Enhancing autophagy may offer a novel treatment for melamine renal injury.

Area of Science:

  • Nephrology
  • Cell Biology
  • Toxicology

Background:

  • Melamine, an industrial chemical, was illegally added to infant formula, leading to widespread childhood kidney disease.
  • The nephrotoxicity of melamine poses a significant public health concern.

Purpose of the Study:

  • To investigate the effect of melamine on autophagy in mesangial cells (MCs).
  • To determine if oxidative stress mediates melamine's impact on autophagy.
  • To assess the protective role of autophagy in melamine-impaired MCs.

Main Methods:

  • Mesangial cells (MCs) were utilized as a model system.
  • Cell viability was assessed using MTT assays.
  • Intracellular hydrogen peroxide (H2O2) levels were measured.
  • Autophagy-related protein expression was analyzed via Western blot.

Main Results:

  • Melamine induced MCs death in a dose- and time-dependent manner.
  • Melamine treatment enhanced autophagy, indicated by increased LC3-II/LC3-I ratio and Beclin-1 levels.
  • Autophagy inhibition exacerbated melamine-induced cell death, suggesting a protective role for autophagy.
  • ROS scavenger N-(mercaptopropionyl)-glycine (N-MPG) inhibited melamine-induced cell death and reduced autophagy.

Conclusions:

  • Melamine enhances autophagy in MCs, potentially through increased ROS levels.
  • Autophagy plays a protective role in mitigating melamine-induced renal injury.
  • Modulating autophagy presents a potential therapeutic strategy for melamine nephrotoxicity.
Keywords:
Autophagymelaminemesangial cellsreactive oxygen species

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