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Proteome analysis of pyloric ceca: a methodology for fish feed development?
Tune Wulff1, Jørgen Petersen, Mette R Nørrelykke
1Division of Industrial Food Research, Technical University of Denmark , Kgs. Lyngby, Denmark.
Journal of Agricultural and Food Chemistry
|August 8, 2012
Summary
Substituting fish meal in rainbow trout feed with alternative proteins alters gut protein expression. This proteomic study reveals how fish adapt their digestive proteins to new feed formulations.
Area of Science:
- Aquaculture
- Proteomics
- Fish Nutrition
Background:
- Fish feed protein sources significantly impact fish growth, quality, and feed utilization.
- Investigating the molecular mechanisms behind these impacts is crucial for sustainable aquaculture.
Purpose of the Study:
- To develop and apply a proteomic workflow using two-dimensional gel electrophoresis (2D-PAGE) to analyze fish gut protein changes.
- To assess the effects of substituting fish meal with alternative protein sources on rainbow trout gut proteomes.
Main Methods:
- Rainbow trout were divided into five groups and fed experimental diets varying in protein composition for 72 days.
- Proteins were extracted from the pyloric ceca and separated using 2D-PAGE, allowing analysis of over 440 protein spots.
- Protein identification was performed using mass spectrometry.
Main Results:
- Significant changes in the expression of 41 protein spots were observed in response to dietary protein variations.
- Mass spectrometry identified 31 of these differentially expressed proteins.
- Key identified proteins were involved in digestive processes, such as trypsinogen and aminopeptidase.
Conclusions:
- Dietary formulation significantly influences the protein composition of the rainbow trout gut.
- The developed proteomic workflow effectively reveals adaptive changes in fish digestive systems in response to feed alterations.
- These findings contribute to optimizing fish feed strategies for improved aquaculture outcomes.
