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Melanoidins isolated from heated potato fiber (Potex) affect human colon cancer cells growth via modulation of cell cycle and proliferation regulatory proteins

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Author

  • Ewa Langner
  • Fernando M. Nunes
  • Piotr Pozarowski
  • Martyna Kandefer-Szerszen
  • Stefan Pierzynowski
  • Wojciech Rzeski

Summary, in English

Melanoidins are brown, nitrogen containing, high molecular weight end products of Maillard reaction with poorly established activity towards tumor cells. The goal of present study was to verify whether both heated potato fiber Potex extract (180 degrees C for 2 h) and melanoidins isolated from the extract exerts growth-inhibiting activity in human colon cancer cells in vitro. The cells of LS180 colon cancer cell line were tested upon treatment with roasted potato fiber extract (AM4) as well as with high (HMW) and low (LMW) molecular weight fractions isolated from the extract, since both may be regarded as/or contain melanoidins. The tested compounds at concentration of 1000 mu g/ml reduced cell growth down to 45%, 69% and 54%, respectively. Furthermore, deregulated ERK1/2 signaling was revealed upon treatment. Moreover, multiple alternations in cell cycle regulators activity were found (i.e. cyclinD1, cyclin-dependent kinase 4 and 6, p21, p27, p53, pRb) leading to cell cycle cessation in GO phase. Importantly, LMW compounds revealed markedly stronger potential to alter specific molecular targets comparing to HMW compounds. Summarizing, the results emphasize that both high and low molecular weight melanoidins contribute to antiproliferative activity of heated potato fiber in LS180 colon cancer cells in vitro. (C) 2013 Elsevier Ltd. All rights reserved.

Department/s

  • Functional zoology

Publishing year

2013

Language

English

Pages

246-255

Publication/Series

Food and Chemical Toxicology

Volume

57

Document type

Journal article

Publisher

Elsevier

Topic

  • Pharmacology and Toxicology

Keywords

  • Antiproliferative activity
  • Colon cancer
  • Cell cycle inhibition
  • Melanoidins
  • Potato fiber

Status

Published

ISBN/ISSN/Other

  • ISSN: 0278-6915