Abstract
Aims
To identify fecal microbiota profiles associated with metabolic abnormalities belonging to the metabolic syndrome (MS), high count of white blood cells (WBCs) and insulin resistance (IR).
Methods
Sixty-eight young patients with obesity were stratified for percentile distribution of MS abnormalities. A MS risk score was defined as low, medium, and high MS risk. High WBCs were defined as a count ≥ 7.0 103/µL; severe obesity as body mass index Z-score ≥ 2 standard deviations; IR as homeostatic assessment model algorithm of IR (HOMA) ≥ 3.7. Stool samples were analyzed by 16S rRNA-based metagenomics.
Results
We found reduced bacterial richness of fecal microbiota in patients with IR and high diastolic blood pressure (BP). Distinct microbial markers were associated to high BP (Clostridium and Clostridiaceae), low high-density lipoprotein cholesterol (Lachnospiraceae, Gemellaceae, Turicibacter), and high MS risk (Coriobacteriaceae), WBCs (Bacteroides caccae, Gemellaceae), severe obesity (Lachnospiraceae), and impaired glucose tolerance (Bacteroides ovatus and Enterobacteriaceae). Conversely, taxa such as Faecalibacterium prausnitzii, Parabacterodes, Bacteroides caccae, Oscillospira, Parabacterodes distasonis, Coprococcus, and Haemophilus parainfluenzae were associated to low MS risk score, triglycerides, fasting glucose and HOMA-IR, respectively. Supervised multilevel analysis grouped clearly “variable” patients based on the MS risk.
Conclusions
This was a proof-of-concept study opening the way at the identification of fecal microbiota signatures, precisely associated with cardiometabolic risk factors in young patients with obesity. These evidences led us to infer, while some gut bacteria have a detrimental role in exacerbating metabolic risk factors some others are beneficial ameliorating cardiovascular host health.
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Availability of data and materials
Sequencing reads and the associated metadata are available at BioProject database of NCBI (PRJNA356507 and PRJNA280490) (https://www.ncbi.nlm.nih.gov/bioproject/).
Abbreviations
- 2HPG:
-
2H plasma glucose
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- BMI:
-
Body mass index
- CVD:
-
Cardiovascular disease
- DBP:
-
Diastolic blood pressures
- HbA1c:
-
Hemoglobin A1c
- HDL-C:
-
High-density lipoprotein cholesterol
- HFD:
-
High-fat diet
- HOMA-IR:
-
Homeostatic assessment model algorithm of insulin resistance
- IGT:
-
Impaired glucose tolerance
- IQR:
-
Interquartile range
- IR:
-
Insulin resistance
- LDA:
-
Linear discriminant analysis
- LEfSe:
-
Linear discriminant analysis effect size
- MS:
-
Metabolic syndrome
- NAST:
-
Nearest Alignment Space Termination
- NGT:
-
Normal glucose tolerance
- OPBG:
-
''Bambino Gesù'' Children’s Hospital
- OTUs:
-
Operational taxonomic units
- PCA:
-
Principal component analysis
- PCoA:
-
Principal coordinate analysis
- PLS:
-
Sparse partial least squares
- QIIME:
-
Quantitative Insights Into Microbial Ecology
- SBP:
-
Systolic blood pressures
- SDS:
-
Standard deviation score
- T2D:
-
Type 2 diabetes
- WBCs:
-
White blood cells
- γ-GT:
-
γ-Glutamyl transferase
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This work was supported by the European Commission under the 7th FP_Information Communication Technologies Programme_MD-Paedigree, Model Driven Paediatric European Digital Repository, (Grant Agreement No. 600932).
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Conceptualization, Melania Manco; Data curation, Marzia Bianchi; Formal analysis, Federica Del Chierico, Valentina Tortosa and Andrea Quagliariello, Simone Gardini, Valerio Guarrasi; Funding acquisition, Melania Manco; Investigation, Alessandra Russo, Blegina Shashaj and Danilo Fintini; Methodology, Alessandra Russo; Project administration, Marzia Bianchi; Resources, Danilo Fintini and Lorenza Putignani; Software, Valentina Tortosa, Andrea Quagliariello, Simone Gardini, Valerio Guarrasi; Supervision, Lorenza Putignani; Writing – original draft, Federica Del Chierico and Melania Manco; Writing – review & editing, Federica Del Chierico, Melania Manco, Alessandra Russo, Marzia Bianchi, Valentina Tortosa, Andrea Quagliariello, Simone Gardini, Valerio Guarrasi, Blegina Shashaj, Danilo Fintini and Lorenza Putignani. All authors had final approval of the submitted and published versions.
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The study was approved by the OPBG ethical committee (protocol #615/2013) and was conducted in accordance with the Principles of Good Clinical Practice and the Declaration of Helsinki.
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Del Chierico, F., Manco, M., Gardini, S. et al. Fecal microbiota signatures of insulin resistance, inflammation, and metabolic syndrome in youth with obesity: a pilot study. Acta Diabetol 58, 1009–1022 (2021). https://doi.org/10.1007/s00592-020-01669-4
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DOI: https://doi.org/10.1007/s00592-020-01669-4