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- W2037046286 abstract "Seven agents were analyzed with respect to their ability to induce heat shock protein (HSP) synthesis in C6 rat glioma cells. Induction of HSP synthesis was correlated with cytotoxicity and lipophilicity of the substances. In addition to the first four n-alcohols (methanol, ethanol, propanol and butanol) and phenol, whose capacity to induce HSP was analyzed earlier (Neuhaus-Steinmetz et al., 1994. Mol. Pharmacol. 45, 36-41), isopropanol, 1,4-dinitrophenol (DNP), diethylstilbestrol (DES), carbonylcyanide-m-chlorophenylhydrazone (CCCP), rotenone, paracetamol and acetyl salicylic acid (ASA) induced HSP synthesis after a 1-h incubation at a substance-specific concentration. The maximal induction of HSPs was closely correlated with the cytotoxicity of all substances and occurred when cell viability was reduced to 75 +/- 11% of the controls. Cytotoxicity and the ability to induce HSP were correlated with the lipophilicity of the alcohols, phenol, rotenone and paracetamol. Calculation of the hypothetical membrane concentrations of these compounds yielded a nearly equal value (0.54 +/- 0.13 M), indicating that interaction of substances with lipophilic cellular compounds, such as membranes or lipophilic core regions of proteins, is a critical step leading to HSP induction. This assumption is supported by a correlation between HSP induction and protein denaturation by the different alcohols (Herskovits et al., 1970. J. Biol. Chem. 245, 2588-2598). We assume that the amount of misfolded proteins induced by these lipophilic agents is responsible for the induction of HSP synthesis. ASA, DNP and CCCP induced HSP at lower concentrations than substances with a similar lipophilicity, which may be due to effects which add to the misfolding of proteins or to other signal pathways." @default.
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- W2037046286 date "1997-12-01" @default.
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- W2037046286 title "Heat shock protein induction by certain chemical stressors is correlated with their cytotoxicity, lipophilicity and protein-denaturing capacity" @default.
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- W2037046286 doi "https://doi.org/10.1016/s0300-483x(97)00124-8" @default.
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