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Research Article | Host-Microbe Biology

Impact of Individual Traits, Saturated Fat, and Protein Source on the Gut Microbiome

Jennifer M. Lang, Calvin Pan, Rita M. Cantor, W. H. Wilson Tang, Jose Carlos Garcia-Garcia, Ira Kurtz, Stanley L. Hazen, Nathalie Bergeron, Ronald M. Krauss, Aldons J. Lusis
Claire M. Fraser, Editor
Jennifer M. Lang
aDepartment of Medicine, Division of Cardiology, University of California, Los Angeles, California, USA
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Calvin Pan
bDepartment of Human Genetics, University of California, Los Angeles, California, USA
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Rita M. Cantor
bDepartment of Human Genetics, University of California, Los Angeles, California, USA
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W. H. Wilson Tang
cLerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Jose Carlos Garcia-Garcia
dLife Sciences TPT, Procter & Gamble, Cincinnati, Ohio, USA
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Ira Kurtz
eDepartment of Medicine, Division of Nephrology, University of California, Los Angeles, California, USA
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Stanley L. Hazen
cLerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Nathalie Bergeron
fDepartment of Biological and Pharmaceutical Sciences, College of Pharmacy, Touro University California, Vallejo, California, USA
gChildren’s Hospital Oakland Research Institute, Oakland, California, USA
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Ronald M. Krauss
gChildren’s Hospital Oakland Research Institute, Oakland, California, USA
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Aldons J. Lusis
aDepartment of Medicine, Division of Cardiology, University of California, Los Angeles, California, USA
bDepartment of Human Genetics, University of California, Los Angeles, California, USA
hDepartment of Microbiology, Immunology and Molecular Genetics, University of California, Los Angeles, California, USA
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Claire M. Fraser
University of Maryland, School of Medicine
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DOI: 10.1128/mBio.01604-18
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  • FIG 1
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    FIG 1

    Study design and dietary composition breakdown of APPROACH study. All participants were put on a baseline diet for 2 weeks and then separated into low- and high-saturated-fat groups for the experimental diets. Within the fat group, the protein diets were randomized to create a split-plot design, meaning that participants received all protein treatments but only one fat level. Experimental diets lasted 4 weeks with a 2-week, but up to 7-week, washout period where participants ate their home diet. Levels are based on compositional analysis of 10,460-kJ four-day rotating menus. Protein and fiber were calculated values (Nutrition Data System for Research, University of Minnesota) to include adjustments of compositional analysis of daily menus.

  • FIG 2
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    FIG 2

    Overall dietary influence on the microbiome. Unweighted UniFrac PCoA data of fecal samples from 109 participants are labeled by (A) saturated fat level and (B) protein diet. Differentially abundant OTUs between (C) saturated fat level and (D) protein diet were determined by DESeq2 using age, sex, ethnicity, and diet order as covariates. Significant OTUs with P values (Benjamini-Hochberg corrected) that are described at the genus level are displayed as relative abundance within each diet.

  • FIG 3
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    FIG 3

    Participant characteristics outweighed dietary interventions and drove overall microbiome community composition. Continuous traits were fit to the ordination as vectors using regression, and (A) alpha diversity (P < 0.001), (B) beta diversity (P < 0.001), and (C) age (P < 0.001) were the most influential. Categorical variables were tested with nonparametric multivariate analysis of variance (PERMANOVA) to determine if variables were clustered significantly differently, and (D) sex (P < 0.001), (E) ethnicity (P < 0.001), and (F) participant (P < 0.001) were significant. Dashed lines for sex represent 95% confidence interval from the centroid of the cluster. Polygons connect all of the samples from one participant.

  • FIG 4
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    FIG 4

    Differentially abundant OTUs between sex (A) and ethnicity (B) are displayed at the genus level. Significance was determined with DESeq2 and accounted for age, diet, diet order, saturated fat level, and sex or ethnicity.

  • FIG 5
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    FIG 5

    Microbiota are correlated with physical traits. Correlations between genera and traits were conducted using nonparametric Spearman correlation and organized into heat maps with hierarchical clustering. P values were determined by permuting by participant, and significant correlations are designated with asterisks representing P values where *** is <0.001, ** is 0.001 to 0.01, and * is 0.01 to 0.05.

  • FIG 6
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    FIG 6

    “Protein-sensitive” OTUs were determined to respond to any change in protein source regardless of saturated fat level. Differentially abundant OTUs between each protein diet were determined with DESeq2 and accounted for age, diet order, saturated fat level, sex, and ethnicity. OTUs that were differentially abundant in all comparisons of protein source were determined to be “protein sensitive.”

  • FIG 7
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    FIG 7

    Alpha diversity predicts beta diversity. Linear mixed model using age, sex, ethnicity, saturated fat level, and protein diet as covariates was significant (r2 = 0.87, P value = 0.015). Beta diversity was calculated as the distance between the baseline diet and each experimental diet (three per person) for each participant.

Tables

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  • TABLE 1

    Differentially abundant OTUs between protein sources

    Diet comparisonNo. of OTUs
    All dataSaturated fat level
    LowHigh
    Red meat vs nonmeat3115203
    White meat vs nonmeat1145198
    Red meat vs white meat0130240
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Impact of Individual Traits, Saturated Fat, and Protein Source on the Gut Microbiome
Jennifer M. Lang, Calvin Pan, Rita M. Cantor, W. H. Wilson Tang, Jose Carlos Garcia-Garcia, Ira Kurtz, Stanley L. Hazen, Nathalie Bergeron, Ronald M. Krauss, Aldons J. Lusis
mBio Dec 2018, 9 (6) e01604-18; DOI: 10.1128/mBio.01604-18

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Impact of Individual Traits, Saturated Fat, and Protein Source on the Gut Microbiome
Jennifer M. Lang, Calvin Pan, Rita M. Cantor, W. H. Wilson Tang, Jose Carlos Garcia-Garcia, Ira Kurtz, Stanley L. Hazen, Nathalie Bergeron, Ronald M. Krauss, Aldons J. Lusis
mBio Dec 2018, 9 (6) e01604-18; DOI: 10.1128/mBio.01604-18
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    • ABSTRACT
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KEYWORDS

DIET
diversity
gut microbiome
personal traits
protein
saturated fat

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