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Effect of Aging on the Composition of Fecal Microbiota in Donors for FMT and Its Impact on Clinical Outcomes

Abstract

Background

Fecal microbiota transplantation (FMT) is emerging as an effective therapy for the treatment of recurrent Clostridium difficile infection (RCDI). Selecting an appropriate donor is vital to the success of FMT. However, the relationship between age of donors and the efficacy of FMT has not been examined to date. The aim of this study was to examine the effect of age of healthy donors on their fecal microbiota and assess the impact of these changes on the clinical efficacy of FMT.

Materials and Methods

This IRB-approved prospective study enrolled donors who were deemed healthy for FMT after careful detailed screening for infectious diseases per institutional protocol. The study was conducted between January 2011 and October 2014. Fecal samples were processed and analyzed using 16S rRNA gene amplicon sequencing. Differences in relative abundance and diversity of the donor fecal microbiota were analyzed in donors above and below 60 years of age. Effect of fecal microbiota from donors of different age groups on the efficacy of FMT was also evaluated.

Results

Twenty-eight healthy human subjects from ages 20–82 years were enrolled as donors for FMT. All patients receiving FMT from their respective donors had resolution of RCDI symptoms and had a negative C. difficile toxin test 4–12 weeks after FMT. Genomic analysis showed that the relative abundance of phylum Actinobacteria and family Bifidobacteriaceae was reduced in the donors ≥60 years of age (p < 0.05). However, Bacteroidetes-to-Fermicutes ratio did not demonstrate a significant change between the two groups. Furthermore, microbial diversity did not change significantly with advancing age.

Conclusion

These observations suggest that aging in healthy donors is associated with compositional alterations in the fecal microbiome without change in the overall microbial diversity. These changes do not seem to affect the clinical efficacy of FMT in RCDI patients over 12 months.

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Abbreviations

CDI:

Clostridium difficile infection

FMT:

Fecal microbiota transplantation

GI:

Gastrointestinal

RCDI:

Recurrent Clostridium difficile infection

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Acknowledgments

The authors thank the following people for their time and contribution toward our study: (1) Ms. Tami Parisi, Ms. Kristen Reuter, Ms. Kenda Koerner, and Ms. Barbara Bodner in the Department of Pathology, Sinai Hospital, Baltimore, for their assistance in preparing fecal samples into filtrate for administration during the FMT procedure; (2) Ms. Dayna Sherba in the Division of Gastroenterology, Sinai Hospital, Baltimore, for helping the study team with procedure scheduling and managing follow-up visits of our patients undergoing FMT; (3) Dr. Deepa Dutta, Director of the Department of Microbiology and Pathology, Sinai Hospital, for the patient’s personnel and resource management in preparation of fecal filtrates for administration during the present study; (4) Nursing staff at the Gastrointestinal Diagnostic Center at Sinai Hospital, especially Ms. Laura Thomson and Ms. Denni Arrup, for their excellent patient care and collection of fecal specimens.

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Correspondence to Mohit Girotra.

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The authors declare no conflict of interest.

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Anand, R., Song, Y., Garg, S. et al. Effect of Aging on the Composition of Fecal Microbiota in Donors for FMT and Its Impact on Clinical Outcomes. Dig Dis Sci 62, 1002–1008 (2017). https://doi.org/10.1007/s10620-017-4449-6

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  • DOI: https://doi.org/10.1007/s10620-017-4449-6

Keywords

  • Recurrent Clostridium difficile infection
  • Fecal microbiota transplantation
  • Gut microbiota
  • 16s rRNA Analysis