Binary mixture effects by PBDE congeners (47, 153, 183 or 209) and PCB congeners (126 or 153) in MCF-7 cells: biochemical alterations assessed by IR spectroscopy and multivariate analysis
Llabjani, Valon; Trevisan, Julio; Jones, Kevin C.; Shore, Richard F.; Martin, Francis L.. 2010 Binary mixture effects by PBDE congeners (47, 153, 183 or 209) and PCB congeners (126 or 153) in MCF-7 cells: biochemical alterations assessed by IR spectroscopy and multivariate analysis. Environmental Science & Technology, 44. 3992-3998. 10.1021/es100206fFull text not available from this repository.
Target organisms are continuously and variously exposed to contaminant mixtures in the environment. We noted that treatment with brominated diphenyl ether (BDE)47 or polychlorinated biphenyl (PCB)126 (toxic equivalency factor [TEF] = 0.1) induces similar alterations in MCF-7 cells when these were determined using attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy with multivariate analysis. Because this method appears sensitive enough to signature low-dose effects, we examined how various test agents interact in binary mixtures to induce cell alterations. MCF-7 cells were exposed for 24 h to low concentrations (10−12 M) of polybrominated diphenyl ether (PBDE) congeners (47, 153, 183, or 209) with or without the coplanar PCB126 or nonplanar PCB153. Following treatment, ethanol-fixed cellular material was interrogated using ATR-FTIR spectroscopy; derived IR spectra in the biochemical-cell fingerprint region (1800 cm−1−900 cm−1) were then subjected to principal component analysis-linear discriminant analysis. Assuming that if two test agents independently induce the same cell alteration that in combination they’ll give rise to an additive effect, we examined predicted versus observed differences in induced alterations by binary mixtures. Compared to corresponding control clusters, treatment with PBDE congener plus PCB126 appeared to cancel out their respective induced alterations. However, treatment with binary mixtures including PCB153 gave rise to an enhanced segregation. Our findings suggest that test agents which mediate their cellular effects via similar mechanisms might result in inhibition within a binary mixture whereas independently acting agents could exacerbate induced alterations in overall cell status.
|Programmes:||CEH Topics & Objectives 2009 onwards > Biogeochemistry > BGC Topic 1 - Monitoring and Interpretation of Biogeochemical and Climate Changes > BGC - 1.4 - Develop innovative, effective methods for monitoring fluxes, exposure and effects|
|NORA Subject Terms:||Biology and Microbiology
Ecology and Environment
|Date made live:||23 Jun 2010 09:49|
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