Clinical impact of pre-transplant gut microbial diversity on outcomes of allogeneic hematopoietic stem cell transplantation

Study information

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study design

prospective cohort

Citation

PMID PubMed identifier for scientific articles.

28733895

DOI Digital object identifier for electronic documents.

10.1007/s00277-017-3069-8

URI

Authors

Doki N, Suyama M, Sasajima S, Ota J, Igarashi A, Mimura I, Morita H, Fujioka Y, Sugiyama D, Nishikawa H, Shimazu Y, Suda W, Takeshita K, Atarashi K, Hattori M, Sato E, Watakabe-Inamoto K, Yoshioka K, Najima Y, Kobayashi T, Kakihana K, Takahashi N, Sakamaki H, Honda K, Ohashi K

Journal

Annals of hematology

Year

2017

Keywords:

Acute gastrointestinal graft-versus-host disease (GVHD), Allogeneic hematopoietic stem cell transplantation (allo-HSCT), Intestinal microbiota, Microbial diversity

Post-transplant microbial diversity in the gastrointestinal tract is closely associated with clinical outcomes following allogeneic hematopoietic stem cell transplantation (allo-HSCT). However, little is known about the impact of the fecal microbiota before allo-HSCT. We analyzed fecal samples approximately 2 weeks before conditioning among 107 allo-HSCT recipients between 2013 and 2015. Microbial analysis was performed using 16S rRNA gene sequencing. Operational taxonomic unit-based microbial diversity was estimated by calculating the Shannon index. Patients were classified into three groups based on the diversity index: low (<2), intermediate (2, 3), and high (>3) diversity (18 (16.8%), 48 (44.9%), and 41 (38.3%) patients, respectively). There were no significant differences in the 20-month overall survival, cumulative incidence of relapse, and non-relapse mortality among three groups. The cumulative incidence of grade II to IV acute graft-versus-host disease (aGVHD) was similar among the three groups (low 55.6%; intermediate 35.4%; high 48.8%, p = 0.339, at day 100). Furthermore, we found no differences in the cumulative incidence of grade II to IV acute gastrointestinal GVHD among the three groups (low 38.9%; intermediate 21.3%; high 24.4%, p = 0.778, at day 100). Regarding the composition of microbiota before allo-HSCT, aGVHD patients showed a significantly higher abundance of phylum Firmicutes (p < 0.01) and a lower tendency for Bacteroidetes (p = 0.106) than non-aGVHD patients. Maintenance of Bacteroidetes throughout allo-HSCT may be a strategy to prevent aGVHD.

Experiment 1

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Curated date: 2021/01/10

Curator: WikiWorks

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Subjects

Location of subjects: Japan

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: graft versus host disease disease, graft-versus-host,disease, graft-VS-host,disease, homologous wasting,disease, runt,diseases, graft-versus-host,diseases, graft-VS-host,graft versus host disease,graft VS host disease,graft VS. host disease,graft-versus-host disease,graft-versus-host disease, resistance to,graft-versus-host disease, susceptibility to,graft-versus-host diseases,graft-versus-host-disease,graft-VS-host disease,graft-VS-host diseases,GVH,GVHD,GVHDS,homologous wasting disease,runt disease

Group 0 name Corresponds to the control (unexposed) group for case-control studies: non-acute graft-versus-host disease
Group 1 name Corresponds to the case (exposed) group for case-control studies: acute graft-versus-host disease
Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group: participants that developed acute graft-versus-host disease after allogeneic hematopoeitic transplant and graded accordinly to pattern of organ involvement and clinical performance status using a system introduced by Glucksberg et al. (Severity Index), which includes late-onset of acute graft-versus-host disease (more than 100 days after transplantation)
Group 1 sample size Number of subjects in the case (exposed) group: 107

Lab analysis

Sequencing type: 16S

16S variable region One or more hypervariable region(s) of the bacterial 16S gene: V1-V2

Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance: Roche454

Statistical Analysis

Statistical test: T-Test

Significance threshold p-value or FDR threshold used for differential abundance testing (if any): 0.01
MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?: No

Signature 1

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Curated date: 2021/01/10

Curator: William Lam

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Source: Figure 2

Description: pre-transplant relative abundance of phylum-level gut microbial diversity on the non-acute graft-versus-host disease compared to acute graft-versus-host disease in outcomes of allogeneic hematopoietic stem cell transplantation

Abundance in Group 1: increased abundance in acute graft-versus-host disease

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Bacillota

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Experiment 2

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Differences from previous experiment shown

Subjects

Lab analysis

Statistical Analysis

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

Signature 1

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Curated date: 2021/01/10

Curator: William Lam

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Source: Figure 3

Description: pre-transplant genus-level gut microbial diversity on the non-acute graft-versus-host disease compared to acute graft-versus-host disease in outcomes of allogeneic hematopoietic stem cell transplantation

Abundance in Group 1: increased abundance in acute graft-versus-host disease

NCBI	Quality Control	Links
Faecalibacterium
Eubacterium

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