N-epsilon-Carboxymethyllysine (CML), a Maillard reaction product, stimulates serotonin release and activates the receptor for advanced glycation end products (RAGE) in SH-SY5Y cells

Ann-Katrin Holik (Corresponding author), Barbara Rohm, Mark Manuel Somoza, Veronika Somoza

Publications: Contribution to journalArticlePeer Reviewed

Abstract

Maillard reaction products, which are formed in highly thermally treated foods, are commonly consumed in a Western diet. In this study, we investigated the impact of N-epsilon-carboxymethyllysine (CML), a well-characterized product of the Maillard reaction, on the gene regulation of the human neuroblastoma cell line SH-SY5Y. Pathway analysis of data generated from customized DNA microarrays revealed 3 h incubation with 50 mu M and 500 mu M CML to affect serotonin receptor expression. Further experiments employing qRT-PCR showed an up-regulation of serotonin receptors 2A, 1A and 1B after 0.25 h and 3 h. In addition, 500 mu M CML increased serotonin release, thus showing effects of CML not only at a genetic, but also at a functional level. Intracellular calcium mobilization, which mediates serotonin release, was increased by CML at concentrations of 0.05-500 mu M. Since calcium mobilization has been linked to the activation of the receptor for advanced glycation end products (RAGE), we further investigated the effects of CML on RAGE expression. RAGE was found to be up-regulated after incubation with 500 mu M CML for 0.25 h. Co-incubation with the calcium blocker neomycin for 0.25 h blocked the up-regulation of RAGE and the serotonin receptors 2A, 1A and 1B. These results indicate a possible link between a CML-induced calcium-mediated serotonin release and RAGE.
Original languageEnglish
Pages (from-to)1111-1120
Number of pages10
JournalFood & Function: linking the chemistry and physics of food with health and nutrition
Volume4
Issue number7
DOIs
Publication statusPublished - 2013

Austrian Fields of Science 2012

  • 106002 Biochemistry
  • 303009 Nutritional sciences
  • 104009 Food chemistry

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