Microarray analysis of differential utilization of plant-based diets by rainbow trout |
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| Authors: | Ken Overturf Roger L Vallejo Yniv Palti Fredrick T Barrows James E Parsons |
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| Institution: | (1) USDA-ARS, Hagerman Fish Culture Experiment Station, 3059-F National Fish Hatchery Road, Hagerman, ID 83332, USA;(2) USDA-ARS, National Center for Cool and Cold Water Aquaculture, 11861 Leetown Road, Kearneysville, WV 25430, USA;(3) Troutlodge, Inc, 1200 McCutcheon Road, Sumner, WA 938390, USA |
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| Abstract: | Microarray analysis was conducted using liver samples from two families of rainbow trout that differed in their growth responses
when compared between individuals fed a fishmeal or plant protein-based diet. Differential expression relating to dietary
utilization between the two families found significant changes in expression of 33 expressed sequence tags (ESTs). Eight of
the differentially expressed ESTs had identified mammalian homologs that had been previously researched with identified cellular
interactions and functions. Utilizing pathway analysis software to analyze sequences annotated with known mammalian genes,
we were able to map gene pathways and process interactions. From this information, we were able to infer that the metabolic
changes associated with utilization of plant protein versus fishmeal were associated with differential regulation of genes
related to cell oxidative stress, proliferation, growth and survival. Furthermore, we inferred from the changes we observed
in immune response gene expression that ingestion of this plant-based diet upregulated the expression of genes involved in
immunoregulatory processes. |
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