Gut Microbiome Profiles Are Associated With Type 2 Diabetes in Urban Africans

Study information

Reviewed Marked as Reviewed by Claregrieve1 on 2022/12/31

study design

case-control

Citation

PMID PubMed identifier for scientific articles.

32158702

DOI Digital object identifier for electronic documents.

10.3389/fcimb.2020.00063

URI

https://pubmed.ncbi.nlm.nih.gov/32158702/

Authors

Doumatey AP, Adeyemo A, Zhou J, Lei L, Adebamowo SN, Adebamowo C, Rotimi CN

Journal

Frontiers in cellular and infection microbiology

Year

2020

Keywords:

16S V4 rRNA sequencing, gut microbiome, microbial composition, type 2 diabetes, urban Africans

Gut dysbiosis has been associated with several disease outcomes including diabetes in human populations. Currently, there are no studies of the gut microbiome composition in relation to type 2 diabetes (T2D) in Africans. Here, we describe the profile of the gut microbiome in non-diabetic adults (controls) and investigate the association between gut microbiota and T2D in urban West Africans. Gut microbiota composition was determined in 291 Nigerians (98 cases, 193 controls) using fecal 16S V4 rRNA gene sequencing done on the Illumina MiSeq platform. Data analysis of operational taxonomic units (OTU) was conducted to describe microbiome composition and identify differences between T2D and controls. The most abundant phyla were Firmicutes, Actinobacteria, and Bacteroidetes. Clostridiaceae, and Peptostreptococcaceaea were significantly lower in cases than controls (p < 0.001). Feature selection analysis identified a panel of 18 OTUs enriched in cases that included Desulfovibrio piger, Prevotella, Peptostreptococcus, and Eubacterium. A panel of 17 OTUs that was enriched in the controls included Collinsella, Ruminococcus lactaris, Anaerostipes, and Clostridium. OTUs with strain-level annotation showing the largest fold-change included Cellulosilyticum ruminicola (log2FC = -3.1; p = 4.2 × 10-5), Clostridium paraputrificum (log2FC = -2.5; p = 0.005), and Clostridium butyricum (log2FC = -1.76; p = 0.01), all lower in cases. These findings are notable because supplementation with Clostridium butyricum and Desulfovibrio piger has been shown to improve hyperglycemia and reduce insulin resistance in murine models. This first investigation of gut microbiome and diabetes in urban Africans shows that T2D is associated with compositional changes in gut microbiota highlighting the possibility of developing strategies to improve glucose control by modifying bacterial composition in the gut.

Experiment 1

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Reviewed Marked as Reviewed by Claregrieve1 on 2022/12/31

Curated date: 2021/05/26

Curator: Madhubani Dey

Revision editor(s): WikiWorks, Madhubani Dey, Claregrieve1, Victoria

Subjects

Location of subjects: Nigeria

Host species Species from which microbiome was sampled. Contact us to have more species added.: Homo sapiens

Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology: Feces Cow dung,Cow pat,Droppings,Dung,Excrement,Excreta,Faeces,Fecal material,Fecal matter,Fewmet,Frass,Guano,Matières fécales@fr,Merde@fr,Ordure,Partie de la merde@fr,Piece of shit,Porción de mierda@es,Portion of dung,Portion of excrement,Portion of faeces,Portion of fecal material,Portion of fecal matter,Portion of feces,Portion of guano,Portion of scat,Portionem cacas,Scat,Spoor,Spraint,Stool,Teil der fäkalien@de,Feces,feces

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology

Group 0 name Corresponds to the control (unexposed) group for case-control studies: Healthy controls

Group 1 name Corresponds to the case (exposed) group for case-control studies: Individuals diagnosed with Type 2 Diabetes Mellitus

Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: Individuals diagnosed with Type 2 Diabetes Mellitus; The definition of T2D was based on the American Diabetes Association (ADA) criteria: a fasting plasma glucose concentration (FPG) ≥ 126 mg/dl (7.0 mmol/l) or a 2-h post-load value in the oral glucose tolerance test ≥ 200 mg/dl (11.1 mmol/l) on more than one occasion. Alternatively, a diagnosis of T2D was accepted if an individual was on pharmacological treatment for T2D, and a review of clinical records indicated adequate justification for that therapy.

Group 0 sample size Number of subjects in the control (unexposed) group: 193

Group 1 sample size Number of subjects in the case (exposed) group: 98

Lab analysis

Sequencing type: 16S

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: V4

Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance: Illumina

Statistical Analysis

Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).: raw counts

Statistical test: DESeq2

Significance threshold p-value or FDR threshold used for differential abundance testing (if any): 0.05

MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?: Yes

Alpha Diversity

Shannon Estimator of species richness and species evenness: more weight on species richness: increased

Richness Number of species: increased

Signature 1

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Curated date: 2021/06/27

Curator: Madhubani Dey

Revision editor(s): Madhubani Dey, Claregrieve1, WikiWorks

Source: Table 3, Table 4

Description: Differential microbial abundance between controls and individuals with Type 2 Diabetes

Abundance in Group 1: decreased abundance in Individuals diagnosed with Type 2 Diabetes Mellitus

NCBI	Quality Control	Links
Cellulosilyticum ruminicola
Clostridiaceae
Clostridium butyricum
Clostridium paraputrificum
Bacillota
Peptostreptococcaceae

Revision editor(s): Madhubani Dey, Claregrieve1, WikiWorks

Signature 2

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Curated date: 2021/08/15

Curator: Madhubani Dey

Revision editor(s): Madhubani Dey, Claregrieve1, WikiWorks

Source: Table 3, Table 4

Description: Differential microbial abundance between controls and individuals with Type 2 Diabetes

Abundance in Group 1: increased abundance in Individuals diagnosed with Type 2 Diabetes Mellitus

NCBI	Quality Control	Links
Bacteroidota
Desulfovibrio piger ATCC 29098
Methanobacteriota
Prevotella
Terrisporobacter glycolicus
[Ruminococcus] lactaris ATCC 29176

Revision editor(s): Madhubani Dey, Claregrieve1, WikiWorks