Reduced microbial diversity in adult survivors of childhood acute lymphoblastic leukemia and microbial associations with increased immune activation

Study information

Needs review

study design

case-control

Citation

PMID PubMed identifier for scientific articles.

28320465

DOI Digital object identifier for electronic documents.

10.1186/s40168-017-0250-1

URI Uniform resource identifier for web resources.

Authors

Chua LL, Rajasuriar R, Azanan MS, Abdullah NK, Tang MS, Lee SC, Woo YL, Lim YA, Ariffin H, Loke P

Journal

Microbiome

Year

2017

BACKGROUND: Adult survivors of childhood cancers such as acute lymphoblastic leukemia (ALL) have health problems that persist or develop years after cessation of therapy. These late effects include chronic inflammation-related comorbidities such as obesity and type 2 diabetes, but the underlying cause is poorly understood. RESULTS: We compared the anal microbiota composition of adult survivors of childhood ALL (N = 73) with healthy control subjects (N = 61). We identified an altered community with reduced microbial diversity in cancer survivors, who also exhibit signs of immune dysregulation including increased T cell activation and chronic inflammation. The bacterial community among cancer survivors was enriched for Actinobacteria (e.g. genus Corynebacterium) and depleted of Faecalibacterium, correlating with plasma concentrations of IL-6 and CRP and HLA-DR+CD4+ and HLA-DR+CD8+ T cells, which are established markers of inflammation and immune activation. CONCLUSIONS: We demonstrated a relationship between microbial dysbiosis and immune dysregulation in adult ALL survivors. These observations suggest that interventions that could restore microbial diversity may ameliorate chronic inflammation and, consequently, development of late effects of childhood cancer survivors.

Experiment 1

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Curated date: 2021/01/10

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Subjects

Location of subjects: Malaysia

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: Caecum Blind intestine,Blindgut,Caeca,Caecum,Ceca,Cecum,Intestinum caecum,Intestinum crassum caecum,Intestinum crassum cecum

Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology: leukemia blood (leukemia),leukemia,leukemia (disease),leukemia, disease,leukemia, malignant,leukemias,leukemias, general

Group 0 name Corresponds to the control (unexposed) group for case-control studies: controls
Group 1 name Corresponds to the case (exposed) group for case-control studies: survivors of acute lymphoblastic leukemia
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: adult surviors of childhood leukemia
Group 0 sample size Number of subjects in the control (unexposed) group: 61
Group 1 sample size Number of subjects in the case (exposed) group: 73

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

Statistical test: LEfSe

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
LDA Score above Threshold for the linear discriminant analysis (LDA) score for studies using the popular LEfSe tool: 4

Alpha Diversity

Chao1 Abundance-based estimator of species richness: decreased

Signature 1

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Curated date: 2021/01/10

Curator: Fatima Zohra

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Source: Figure 2,Supplementary table S1

Description: Alterations to microbial communities in adult survivors of acute lymphoblastic leukemia

Abundance in Group 1: increased abundance in survivors of acute lymphoblastic leukemia

NCBI	Links
Actinomycetota
Corynebacterium
Corynebacteriaceae
Peptoniphilus ⚠
Finegoldia
Archaea
Staphylococcaceae
Staphylococcus
Actinomyces

Revision editor(s): WikiWorks

Signature 2

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Curated date: 2021/01/10

Curator: Fatima Zohra

Revision editor(s): WikiWorks

Source: Figure 2,Supplementary table S1

Description: Alterations to microbial communities in adult survivors of acute lymphoblastic leukemia

Abundance in Group 1: decreased abundance in survivors of acute lymphoblastic leukemia

NCBI	Links
Bacteroidales
Bacteroidia
Bacteroidota
Oscillospiraceae
Faecalibacterium
Ruminococcus
Rikenellaceae
Lachnospira
Desulfovibrionales
Deltaproteobacteria
Desulfovibrionaceae

Revision editor(s): WikiWorks