Advanced glycation end products induce oxidative stress and mitochondrial dysfunction in SH-SY5Y cells

In Vitro Cell Dev Biol Anim. 2015 Feb;51(2):204-9. doi: 10.1007/s11626-014-9823-5. Epub 2014 Nov 8.

Abstract

This study aimed to investigate the direct effects of advanced glycation end products (AGEs) on the mitochondrial structure and function of SH-SY5Y cells and the possible molecular mechanism(s) underlying mitochondria dysfunction by AGEs. SH-SY5Y cells were cultured in 400 μg/ml of AGE-bovine serum albumin (BSA) for 24 h, and changes in the mitochondrial function of SH-SY5Y cells were analysed as follows. Reactive oxygen species (ROS) were detected using 2',7'-dichlorodihydrofluorescein diacetate molecular probes. Mitochondrial membrane potential (ΔΨm) was determined by flow cytometry using fluorescent probes. The expression of cytochrome c (Cyt c) protein level was assessed by Western blotting. Mitochondrial structures were observed by transmission electron microscopy. Our results showed that AGE-BSA induced an increase in ROS levels, a decrease in mitochondrial ΔΨm, and the release of Cyt c from mitochondria in SH-SY5Y cells. The mitochondria of SH-SY5Y cells showed remarkable swelling and vacuolisation, but these changes were recovered after pretreatment with neutralising anti-receptor for advanced glycation end products (RAGE) antibody. Our results suggested that AGE-BSA induced mitochondrial dysfunction in SH-SY5Y cells through RAGE pathways. Thus, AGEs are potential mechanistic links between diabetes mellitus and Alzheimer's disease.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor / drug effects
  • Cytochromes c / metabolism
  • Glycation End Products, Advanced / pharmacology*
  • Humans
  • Membrane Potential, Mitochondrial / drug effects
  • Mitochondria / drug effects*
  • Mitochondria / metabolism
  • Neuroblastoma / pathology
  • Oxidative Stress / drug effects*
  • Reactive Oxygen Species / metabolism
  • Receptor for Advanced Glycation End Products / metabolism
  • Serum Albumin, Bovine / pharmacology

Substances

  • Glycation End Products, Advanced
  • Reactive Oxygen Species
  • Receptor for Advanced Glycation End Products
  • advanced glycation end products-bovine serum albumin
  • Serum Albumin, Bovine
  • Cytochromes c