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• W1996026361 abstract "5-(hydroxymethyl)-2-furfural (HMF), a common product of the Maillard reaction, occurs in many foods in high concentrations, sometimes exceeding 1 g/kg (in certain dried fruits and caramel products). The toxicological relevance of this exposure has not yet been clarified. Induction of aberrant colonic crypt foci had been reported for HMF, in vitro studies on genotoxicity/mutagenicity have given controversial results. To elucidate the toxic potential of HMF, cytotoxicity (trypan blue exclusion), growth inhibition (SRB assay), mutagenicity (HPRT assay), DNA damage (single-cell gel electrophoresis) and depletion of cellular glutathione were investigated in mammalian cells. Genotoxicity (SOS repair) was monitored in Salmonella typhimurium (umu assay). HMF induced moderate cytotoxicity in V79 cells (LC(50): 115 mM, 1 hr incubation) and in Caco-2 cells (LC(50): 118 mM, 1 hr incubation). Growth inhibition was monitored following 24 hr of incubation (V79, IC(50): 6.4 mM). DNA damage was detectable neither in these cell lines nor in primary rat hepatocytes up to the cytotoxic threshold concentration (75% absolute viability). Likewise, in primary human colon cells, obtained from biopsy material, DNA damage was not measurable. At 120 mM, already exhibiting some reduction in cell viability, HMF was weakly mutagenic at the hprt-locus in V79 cells (mutants/10(6) cells: HMF 120 mM: 16 vs control: 3). Intracelluar glutathione was depleted by HMF (>/=50 mM) in V79 cells, in the human colon adenocarcinoma cell line Caco-2 and in primary rat hepatocytes down to approximately 30% of control (120 mM). Genotoxicity was observed with HMF in the umu assay without external activation (16 mM: 185 rel. umu units, %, P<0.001). The genotoxic potential was not altered by addition of rat liver microsomes. By comparison, the natural flavour constituent (E)-2-hexenal (HEX) was already cytotoxic, mutagenic and depleted glutathione at about 1000-fold lower concentrations. It induced DNA damage in mammalian cells (200-400 microM). These results suggest that HMF does not pose a serious health risk, even though the highest concentrations in specific foods approach the biologically effective concentration range in cell systems." @default.
• W1996026361 created "2016-06-24" @default.
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• W1996026361 date "2000-09-01" @default.
• W1996026361 modified "2023-10-01" @default.
• W1996026361 title "5-Hydroxymethylfurfural: assessment of mutagenicity, DNA-damaging potential and reactivity towards cellular glutathione" @default.
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• W1996026361 doi "https://doi.org/10.1016/s0278-6915(00)00070-3" @default.
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