Atrazine and PCB 153 and their effects on the proteome of subcellular fractions of human MCF-7 cells

Jean Paul Lasserre, Fred Fack, Tommaso Serchi, Dominique Revets, Sébastien Planchon, Jenny Renaut, Lucien Hoffmann, Arno C. Gutleb, Claude P. Muller, Torsten Bohn*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Abstract

Several man-made organic pollutants including polychlorinated biphenyls (PCBs) and several pesticides may exhibit endocrine disrupting (ED) properties. These ED molecules can be comparatively persistent in the environment, and have shown to perturb hormonal activity and several physiological functions. The objective of this investigation was to study the impact of PCB 153 and atrazine on human MCF-7 cells, and to search for marker proteins of their exposure. Cells were exposed to environmentally high but relevant concentrations of atrazine (200 ppb), PCB 153 (500 ppb), 17-β estradiol (positive control, 10 nM) and DMSO (0.1%, negative control) for t = 36 h (n = 3 replicates/exposure group). Proteins from cell membrane and cytosol were isolated, and studied by 2D-DiGE. Differentially regulated proteins were trypsin-digested and identified by MALDI-ToF-ToF and NCBInr database. A total of 36 differentially regulated proteins (>|1.5| fold change, P < 0.05) were identified in the membrane fraction and 22 in the cytosol, and were mainly involved in cell structure and in stress response, but also in xenobiotic metabolism. 67% (membrane) and 50% (cytosol) of differentially regulated proteins were more abundant following atrazine exposure whereas nearly 100% (membrane) and 45% (cytosol) were less abundant following PCB 153 exposure. Western blots of selected proteins (HSBP1, FKBP4, STMN1) confirmed 2D-DiGE results. This study emphasizes the numerous potential effects that ED compounds could have on exposed humans.

Original languageEnglish
Pages (from-to)833-841
Number of pages9
JournalBiochimica et Biophysica Acta - Proteins and Proteomics
Volume1824
Issue number6
DOIs
Publication statusPublished - Jun 2012

Keywords

  • 2D-DiGE
  • Atrazine
  • MCF-7 human cell
  • PCB 153
  • Subcellular fraction

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