ArticleThe Journal of nutrition2023
Low-Protein Diets Composed of Protein Recovered from Food Processing Supported Growth, but Induced Mild Hepatic Steatosis Compared with a No-Protein Diet in Young Female Rats.
Article in The Journal of nutrition, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors at 3 institutions in 1 country.
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Abstract
backgroundLiving in low-income countries often restricts the consumption of adequate protein and animal protein.
objectivesThis study aimed to investigate the effects of feeding low-protein diets on growth and liver health using proteins recovered from animal processing.
methodsFemale Sprague-Dawley rats (aged 28 d) were randomly assigned (n = 8 rats/group) to be fed standard purified diets with 0% or 10% kcal protein that was comprised of either carp, whey, or casein.
resultsRats that were fed low-protein diets showed higher growth but developed mild hepatic steatosis compared to rats that were fed a no-protein diet, regardless of the protein source. Real-time quantitative polymerase chain reactions targeting the expression of genes involved in liver lipid homeostasis were not significantly different among groups. Global RNA-sequencing technology identified 9 differentially expressed genes linked to folate-mediated 1-carbon metabolism, endoplasmic reticulum (ER) stress, and metabolic diseases. Canonical pathway analysis revealed that mechanisms differed depending on the protein source. ER stress and dysregulated energy metabolism were implicated in hepatic steatosis in carp- and whey-fed rats. In contrast, impaired liver one-carbon methylations, lipoprotein assembly, and lipid export were implicated in casein-fed rats.
conclusionsCarp sarcoplasmic protein showed comparable results to commercially available casein and whey protein. A better understanding of the molecular mechanisms in hepatic steatosis development can assist formulation of proteins recovered from food processing into a sustainable source of high-quality protein.
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