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Effects of fescue toxicosis on rat hepatic tissue


ABSTRACT: Rats (n=24) were fed ad libitum diets containing either ground endophyte-free (E-) seed or endophyteâ??infected (E+) seed for five days at thermoneutrality (21°C). Rats (n=24) with intraperitonial transmitters were used with core temperature (Tc) and general activity measured every 5 minutes during the study. At treatment end, the liver was removed, weighed and frozen in liquid nitrogen. Twelve rats were selected for microarray experiments, based on degree of sensitivity to fescue toxicosis. Degree of sensitivity was based on changes in relative liver weights, feed intake, average daily gain, and Tc from pretreatment levels. RNA was extracted from liver samples, converted to cDNA, and hybridized with the printed oligonucleotide slides. The microarray data was analyzed using Wolfinger's two step ANOVA model.

ORGANISM(S): Rattus norvegicus

SUBMITTER: Raja Settivari 

PROVIDER: E-GEOD-2452 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Genomic analysis of the impact of fescue toxicosis on hepatic function.

Settivari R S RS   Bhusari S S   Evans T T   Eichen P A PA   Hearne L B LB   Antoniou E E   Spiers D E DE  

Journal of animal science 20060501 5


Fescue toxicosis is caused by consumption of toxins produced by an endophytic fungus, Neotyphodium coenophialum, in tall fescue [Lolium arundinaceum (Schreb.) Darbysh]. Microarray analysis was used to identify shifts in genetic expression associated with the affected physiological processes to identify potential targets for future pharmacological/toxicological intervention. Male rats (n = 24) were implanted with temperature transmitters, which measure core temperature every 5 min. After an 8-d r  ...[more]

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