Moderate adiposity levels counteract protein metabolism modifications associated with aging in rats.

Purpose: Physiological parameters such as adiposity and age are likely to influence protein digestion and utilization. The aim of this study was to evaluate the combined effects of age and adiposity on casein protein and amino acid true digestibility and its postprandial utilization in rats. Methods...

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Publicado en:European Journal of Nutrition Vol. 61; no. 6; pp. 3189 - 3201
Autores principales: Atallah, Nathalie, Gaudichon, Claire, Boulier, Audrey, Baniel, Alain, Azzout-Marniche, Dalila, Khodorova, Nadezda, Chaumontet, Catherine, Piedcoq, Julien, Chapelais, Martin, Calvez, Juliane
Formato: research tables/charts Journal Article
Publicado: Springer Nature Sep2022
Acceso en línea:Ver este registro en EBSCOhost
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      dt: Sep2022
      vid: 61
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      pub: Springer Nature
      place: New York, New York
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        10.1007/s00394-022-02881-4
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        atl: Moderate adiposity levels counteract protein metabolism modifications associated with aging in rats.
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        au:
          Atallah, Nathalie
          Gaudichon, Claire
          Boulier, Audrey
          Baniel, Alain
          Azzout-Marniche, Dalila
          Khodorova, Nadezda
          Chaumontet, Catherine
          Piedcoq, Julien
          Chapelais, Martin
          Calvez, Juliane
        affil: Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, 75005, Paris, France
      sug:
        subj:
          Adipose Tissue Distribution Evaluation
          Proteins Metabolism
          Caseins Metabolism
          Amino Acids Metabolism
          Aging
          Animal Studies
          Rats
          Obesity
          Nitrogen Compounds
          Dietary Proteins Metabolism
          Deamination
          Outcome Assessment
          Descriptive Statistics
      ab: Purpose: Physiological parameters such as adiposity and age are likely to influence protein digestion and utilization. The aim of this study was to evaluate the combined effects of age and adiposity on casein protein and amino acid true digestibility and its postprandial utilization in rats. Methods: Four groups were included (n = 7/8): 2 months/normal adiposity, 2 months/high adiposity, 11 months/normal adiposity and 11 months/high adiposity. Rats were given a calibrated meal containing 15N-labeled casein (Ingredia, Arras, France) and were euthanized 6 h later. Digestive contents were collected to assess protein and amino acid digestibilities. 15N enrichments were measured in plasma and urine to determine total body deamination. Fractional protein synthesis rate (FSR) was determined in different organs using a flooding dose of 13C valine. Results: Nitrogen and amino acid true digestibility of casein was around 95–96% depending on the group and was increased by 1% in high adiposity rats (P = 0.04). Higher adiposity levels counteracted the increase in total body deamination (P = 0.03) that was associated with older age. Significant effects of age (P = 0.006) and adiposity (P = 0.002) were observed in the muscle FSR, with age decreasing it and adiposity increasing it. Conclusion: This study revealed that a higher level of adiposity resulted in a slight increase in protein and individual amino acid true digestibility values and seemed to compensate for the metabolic postprandial protein alterations observed at older age.
      pubtype: Academic Journal
      doctype:
        research
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        Journal Article
      ougenre: Article
    language: English
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