Oxidative Stress Upregulates the Transcription of Genes Involved in Thiamine Metabolism

Kartal B., Akcay A., Palabiyik B.

TURKISH JOURNAL OF BIOLOGY, vol.42, no.5, pp.447-452, 2018 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 5
  • Publication Date: 2018
  • Doi Number: 10.3906/biy-1801-51
  • Journal Name: TURKISH JOURNAL OF BIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.447-452
  • Keywords: Fission yeast, thiamine, oxidative stress, glucose metabolism, FISSION YEAST, SACCHAROMYCES-CEREVISIAE, SCHIZOSACCHAROMYCES-POMBE, BIOSYNTHESIS, KINASE, DIPHOSPHATE, TRANSPORT, ENZYMES, MODEL
  • Istanbul University Affiliated: Yes

Abstract

Thiamine is a major vitamin that acts as a cofactor in energy metabolism in all organisms, as well as in lipid and amino acid metabolisms, and is associated with many diseases. It is known that glucose starvation decreases the intracellular thiamine pool while increasing oxidative stress tolerance. Earlier, in whole genome analysis, we detected major differences in the expression of genes related to thiamine pathway against oxidative stress in Schizosaccharomyces pombe. We investigated the effects of oxidative stress and glucose repression to thiamine pathway in S. pombe by comparing some genes encoding key enzymes of each related pathway at the transcription level. In the present study, we found that the expression of genes related to thiamine biosynthesis and transport (thi2, thi3, and pho1) increased in wild type and ird11 cells grown in thiamine-rich media under oxidative stress induced by H2O2. Based on our findings, we suggested that there might be an important effect of oxidative stress on thiamine biosynthesis and transport.