Stimulatory effect of vitamin C on autophagy in glial cells

Antonio Martin, James A. Joseph, Ana Maria Cuervo

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Intracellular accumulation of damaged or abnormal proteins is a common event associated with numerous neurodegenerative diseases and other age-related pathologies. Increasing the activity of the intracellular proteolytic systems normally responsible for the removal of these abnormal proteins might be beneficial in lessening the severity or development of those pathologies. In this study we have used human astrocyte glial cells to investigate the effect of vitamin C (ascorbate) on the intracellular turnover of proteins. Supplementation of the culture medium with physiological concentrations of vitamin C did not affect protein synthesis, but did increase the rate of protein degradation by lysosomes. Vitamin C accelerated the degradation of intra- and extracellular proteins targeted to the lysosomal lumen by autophagic and heterophagic pathways. At the doses analyzed, vitamin C lowered and stabilized the acidic intralysosomal pH at values that result in maximum activation of the lysosomal hydrolases.

Original languageEnglish (US)
Pages (from-to)538-549
Number of pages12
JournalJournal of Neurochemistry
Issue number3
StatePublished - 2002


  • Ascorbic acid
  • Astrocytes
  • Cathepsins
  • Lysosomes
  • Protein degradation
  • Vitamins

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience


Dive into the research topics of 'Stimulatory effect of vitamin C on autophagy in glial cells'. Together they form a unique fingerprint.

Cite this