Microarray analysis reveals marked intestinal microbiota aberrancy in infants having eczema compared to healthy children in at-risk for atopic disease

From BugSigDB
Needs review
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Nylund L, Satokari R, Nikkilä J, Rajilić-Stojanović M, Kalliomäki M, Isolauri E, Salminen S, de Vos WM
Journal
BMC microbiology
Year
2013
BACKGROUND: Deviations in composition and diversity of intestinal microbiota in infancy have been associated with both the development and recurrence of atopic eczema. Thus, we decided to use a deep and global microarray-based method to characterize the diversity and temporal changes of the intestinal microbiota in infancy and to define specific bacterial signatures associated with eczema. Faecal microbiota at 6 and 18 months of age were analysed from 34 infants (15 with eczema and 19 healthy controls) selected from a prospective follow-up study based on the availability of faecal samples. The infants were originally randomized to receive either Lactobacillus rhamnosus GG or placebo. RESULTS: Children with eczema harboured a more diverse total microbiota than control subjects as assessed by the Simpson's reciprocal diversity index of the microarray profiles. Composition of the microbiota did not differ between study groups at age of 6 months, but was significantly different at age of 18 months as assessed by MCPP (p=0.01). At this age healthy children harboured 3 -fold greater amount of members of the Bacteroidetes (p=0.01). Microbiota of children suffering from eczema had increased abundance of the Clostridium clusters IV and XIVa, which are typically abundant in adults. Probiotic Lactobacillus rhamnosus GG supplementation in early infancy was observed to have minor long-term effects on the microbiota composition. CONCLUSION: A diverse and adult-type microbiota in early childhood is associated with eczema and it may contribute to the perpetuation of eczema.

Experiment 1


Needs review

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks

Subjects

Location of subjects
Finland
Host species Species from which microbiome was sampled (if applicable)
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
Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
Eczema Eczema
Group 0 name Corresponds to the control (unexposed) group for case-control studies
healthy control
Group 1 name Corresponds to the case (exposed) group for case-control studies
child with eczema
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
child with eczema
Group 0 sample size Number of subjects in the control (unexposed) group
19
Group 1 sample size Number of subjects in the case (exposed) group
15

Lab analysis

Sequencing type
16S
Not specified
Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
Human Intestinal Tract Chip

Statistical Analysis

Statistical test
ANOVA
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)?
No

Alpha Diversity

Inverse Simpson Modification of Simpsons index D as 1/D to obtain high values in datasets of high diversity and vice versa
increased

Signature 1

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): Fatima, WikiWorks

Source: Table 2

Description: Differences in microbiota of healthy and eczematous children at 18 months of age

Abundance in Group 1: increased abundance in child with eczema

NCBI Quality ControlLinks
Ruminococcus bromii
[Clostridium] nexile
[Ruminococcus] lactaris
[Clostridium] leptum
[Clostridium] cellulosi

Revision editor(s): Fatima, WikiWorks

Signature 2

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): WikiWorks

Source: Table 2

Description: Differences in microbiota of healthy and eczematous children at 18 months of age

Abundance in Group 1: decreased abundance in child with eczema

NCBI Quality ControlLinks
Bacteroides fragilis
Bacteroides ovatus
Phocaeicola plebeius
Bacteroides stercoris
Bacteroides uniformis
Phocaeicola vulgatus
Alloprevotella tannerae
Bacteroidota

Revision editor(s): WikiWorks

Experiment 2


Needs review

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks

Differences from previous experiment shown

Subjects

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
age age
Group 0 name Corresponds to the control (unexposed) group for case-control studies
infant at 6 months
Group 1 name Corresponds to the case (exposed) group for case-control studies
infant at 18 months
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
infant 18 months of age
Group 0 sample size Number of subjects in the control (unexposed) group
34
Group 1 sample size Number of subjects in the case (exposed) group
34

Lab analysis

Statistical Analysis

Alpha Diversity

Inverse Simpson Modification of Simpsons index D as 1/D to obtain high values in datasets of high diversity and vice versa
increased

Signature 1

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): WikiWorks, Merit

Source: Figure 1

Description: Relative contribution of phylum-like bacterial groups to the total HITChip signals of infants at 6 and 18 months of age

Abundance in Group 1: increased abundance in infant at 18 months

NCBI Quality ControlLinks
Clostridiaceae
Clostridium
Clostridia
Clostridiales bacterium

Revision editor(s): WikiWorks, Merit

Signature 2

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): WikiWorks

Source: Figure 1

Description: Relative contribution of phylum-like bacterial groups to the total HITChip signals of infants at 6 and 18 months of age

Abundance in Group 1: decreased abundance in infant at 18 months

NCBI Quality ControlLinks
Actinomycetota
Bacilli

Revision editor(s): WikiWorks

Experiment 3


Needs review

Curated date: 2021/01/10

Curator: WikiWorks

Revision editor(s): WikiWorks

Differences from previous experiment shown

Subjects

Lab analysis

Statistical Analysis

Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
0.01

Alpha Diversity

Inverse Simpson Modification of Simpsons index D as 1/D to obtain high values in datasets of high diversity and vice versa
increased

Signature 1

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): WikiWorks

Source: Table 1

Description: Genus-like phylogenetic groups changing statistically significantly from 6 to 18 months of age as assessed by HITChip analysis

Abundance in Group 1: increased abundance in infant at 18 months

NCBI Quality ControlLinks
Ruminococcus bromii
Phascolarctobacterium faecium
Butyrivibrio crossotus
[Clostridium] symbiosum
Lachnobacterium bovis
Coprobacillus cateniformis
Fusobacterium
Proteus
Sutterella wadsworthensis
Mollicutes

Revision editor(s): WikiWorks

Signature 2

Needs review

Curated date: 2021/01/10

Curator: Lucy Mellor

Revision editor(s): WikiWorks

Source: Table 1

Description: Genus-like phylogenetic groups changing statistically significantly from 6 to 18 months of age as assessed by HITChip analysis

Abundance in Group 1: decreased abundance in infant at 18 months

NCBI Quality ControlLinks
Bifidobacterium
Lactiplantibacillus plantarum

Revision editor(s): WikiWorks