Dietary Creatine Supplementation in Gilthead Seabream (Sparus aurata): Comparative Proteomics Analysis on Fish Allergens, Muscle Quality, and Liver

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review



  • Author: Schrama, Denise

    University of Algarve, Portugal

  • Author: Cerqueira, Marco

    University of Algarve, Portugal

  • Author: Raposo, Claúdia S.

    University of Algarve, Portugal

  • Author: Rosa da Costa, Ana M.

    University of Algarve, Portugal

  • Author: Wulff, Tune

    iLoop, Pre-Pilot Plant, CHO Core, Translational Management, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet, 2800, Kgs. Lyngby, Denmark

  • Author: Goncalves, Amparo

    Instituto Português do Mar e da Atmosfera, Portugal

  • Author: Camacho, Carolina

    Instituto Português do Mar e da Atmosfera, Portugal

  • Author: Colen, Rita

    University of Algarve, Portugal

  • Author: Fonseca, Flávio

    Ciência e Tecnologia do Amazonas, Brazil

  • Author: Rodrigues, Pedro M.

    University of Algarve, Portugal

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The quality of fish flesh depends on the skeletal muscle's energetic state and delaying energy depletion through diets supplementation could contribute to the preservation of muscle's quality traits and modulation of fish allergens. Food allergies represent a serious public health problem worldwide with fish being one of the top eight more allergenic foods. Parvalbumins, have been identified as the main fish allergen. In this study, we attempted to produce a low allergenic farmed fish with improved muscle quality in controlled artificial conditions by supplementing a commercial fish diet with different creatine percentages. The supplementation of fish diets with specific nutrients, aimed at reducing the expression of parvalbumin, can be considered of higher interest and beneficial in terms of food safety and human health. The effects of these supplemented diets on fish growth, physiological stress, fish muscle status, and parvalbumin modulation were investigated. Data from zootechnical parameters were used to evaluate fish growth, food conversion ratios and hepatosomatic index. Physiological stress responses were assessed by measuring cortisol releases and muscle quality analyzed by rigor mortis and pH. Parvalbumin, creatine, and glycogen concentrations in muscle were also determined. Comparative proteomics was used to look into changes in muscle and liver tissues at protein level. Our results suggest that the supplementation of commercial fish diets with creatine does not affect farmed fish productivity parameters, or either muscle quality. Additionally, the effect of higher concentrations of creatine supplementation revealed a minor influence in fish physiological welfare. Differences at the proteome level were detected among fish fed with different diets. Differential muscle proteins expression was identified as tropomyosins, beta enolase, and creatine kinase among others, whether in liver several proteins involved in the immune system, cellular processes, stress, and inflammation response were modulated. Regarding parvalbumin modulation, the tested creatine percentages added to the commercial diet had also no effect in the expression of this protein. The use of proteomics tools showed to be sensitive to infer about changes of the underlying molecular mechanisms regarding fish responses to external stimulus, providing a holistic and unbiased view on fish allergens and muscle quality.
Original languageEnglish
Article number1844
JournalFrontiers in Physiology
Number of pages17
Publication statusPublished - 2018
CitationsWeb of Science® Times Cited: No match on DOI

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