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Isolated White Lupin Proteins Beneficially Modulate the Intestinal Microbiota Composition in Rats.

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Dietary Milk or Isolated Legume Proteins Modulate Intestinal Microbiota Composition in Rats.

Luis A Rubio1

  • 1Department of Animal Nutrition and Sustainable Production, Estación Experimental del Zaidin (CSIC), Profesor Abareda 1, 18008 Granada, Spain.

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|January 11, 2024
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Summary
This summary is machine-generated.

Dietary proteins significantly impact gut microbiota. Legume proteins, particularly lupin protein isolate, promote a healthier gut microbiome compared to milk proteins like casein and lactalbumin.

Keywords:
Cicer arietinumLupinus angustifioliuscaseinintestinal microbiota compositionlactalbuminprotein isolatesrat

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Area of Science:

  • Microbiology
  • Nutritional Science
  • Gastroenterology

Background:

  • High-protein diets can alter gut microbial composition and produce potentially harmful metabolites.
  • Dietary protein sources, such as milk and legumes, may differentially affect the intestinal environment.

Purpose of the Study:

  • To investigate the impact of different dietary protein sources (milk vs. legume) on rat caecal microbiota composition and predicted functionality.
  • To compare the effects of casein (CAS), lactalbumin (LA), chickpea protein isolate (CPI), and lupin protein isolate (LI) on gut microbial profiles.

Main Methods:

  • Rats were fed diets varying only in protein source: milk (CAS, LA) or legume (CPI, LI).
  • Intestinal (caecal) microbiota composition and predicted functionality were analyzed using ANOSIM, Discriminant Analysis, PICRUSt, and LEfSe.
  • Statistical significance was determined at p < 0.05.

Main Results:

  • Significant differences in microbiota composition and predicted functionality were observed between protein groups at family and genus levels.
  • Lactalbumin (LA) resulted in a healthier microbiota profile compared to casein (CAS).
  • Lupin protein isolate (LI) consumption was associated with increased Methanobrevibacter spp. and Methanogenic_PWY.

Conclusions:

  • Dietary proteins exert distinct effects on gut microbiota composition and function.
  • Legume-based proteins, particularly lupin protein isolate, appear to beneficially modulate the intestinal microbiota.
  • The protein constituents of legume-based diets contribute to their positive effects on gut health.