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Gene expression in the liver of rainbow trout, Oncorhynchus mykiss, during the stress response

January 1, 2007

To better appreciate the mechanisms underlying the physiology of the stress response, an oligonucleotide microarray and real-time RT-PCR (QRT-PCR) were used to study gene expression in the livers of rainbow trout (Oncorhynchus mykiss). For increased confidence in the discovery of candidate genes responding to stress, we conducted two separate experiments using fish from different year classes. In both experiments, fish exposed to a 3 h stressor were compared to control (unstressed) fish. In the second experiment some additional fish were exposed to only 0.5 h of stress and others were sampled 21 h after experiencing a 3 h stressor. This 21 h post-stress treatment was a means to study gene expression during recovery from stress. The genes we report as differentially expressed are those that responded similarly in both experiments, suggesting that they are robust indicators of stress. Those genes are a major histocompatibility complex class 1 molecule (MHC1), JunB, glucose 6-phosphatase (G6Pase), and nuclear protein 1 (Nupr1). Interestingly, Nupr1 gene expression was still elevated 21 h after stress, which indicates that recovery was incomplete at that time.

Citation Information

Publication Year 2007
Title Gene expression in the liver of rainbow trout, <i>Oncorhynchus mykiss</i>, during the stress response
DOI 10.1016/j.cbd.2007.06.002
Authors T.S. Momoda, A.R. Schwindt, G.W. Feist, L. Gerwick, C.J. Bayne, C.B. Schreck
Publication Type Article
Publication Subtype Journal Article
Series Title Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics
Series Number
Index ID 70031261
Record Source USGS Publications Warehouse
USGS Organization