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Volume 73, Issue 11

Association of gut microbiota with allograft injury in kidney transplant recipients: a comparative profiling through 16S metagenomics and quantitative PCR No Access

Abstract

The existence of a mutual relationship between gut microbiota and immune homeostasis highlights its importance in the context of kidney transplantation.

The translational utility of gut microbiota as a biomarker for allograft injury has not been assessed before.

In this study, we aimed to characterize the gut microbial diversity in kidney transplant recipients and investigate the alterations in the gut microbial composition in association with allograft injury such as histopathological graft rejection and calcineurin inhibitor toxicity. In addition, we compared the gut microbial quantitation using 16S metagenomics and quantitative PCR (qPCR) to assess its translational utility.

In this prospective longitudinal cohort study, we enrolled 38 kidney transplant recipients and collected serial faecal specimens (=114), once before the induction therapy, and twice after transplant, during the first and third month. We characterized the gut microbial composition through 16S rRNA sequencing and qPCR from the DNA isolates of the samples. The recipients were clinically followed up for a median of 600 days post-transplant. Histopathological evidence of allograft rejection and calcineurin inhibitor toxicity were used for the correlational analysis with gut microbial diversity.

Significant differences in the gut microbial diversity were observed between the pre- and post-transplant samples. Pre-transplant gut microbiota revealed a higher relative abundance of phylum in the allograft rejection group, and a higher relative abundance of phylum was observed in the histopathological features of calcineurin inhibitor toxicity (hCNI toxicity) group. We found a high concordance between 16S metagenomics and qPCR outputs for assessing the gut microbial diversity. Furthermore, the receiver operating characteristic curve analysis has also proven that the pre-transplant levels of gut microbial dysbiosis, as a potential predictive biomarker for allograft injury.

Our pilot study found a strong statistical association of gut microbial dysbiosis with kidney allograft injury, highlighting the potential of gut microbiota as a predictive biomarker and that qPCR serves as a more reliable and economic tool for assessing dysbiosis paving the way for its translational utility.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): 16S metagenomics , allograft injury , gut microbiota , kidney transplantation and qPCR
Funding
This study was supported by the:
  • Jawaharlal Institute Of Postgraduate Medical Education and Research (Award JIP/IEC/2017/0115)
    • Principle Award Recipient: RajeshNachiappa Ganesh
  • Department of Biotechnology, Ministry of Science and Technology, India (Award BT/PR24816/MED/30/1902/2017)
    • Principle Award Recipient: RajeshNachiappa Ganesh
© 2024 The Authors
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2024-11-14
2024-12-08
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/content/journal/jmm/10.1099/jmm.0.001934
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Association of gut microbiota with allograft injury in kidney transplant recipients: a comparative profiling through 16S metagenomics and quantitative PCR
J. Med. Microbiol. 73, 001934 (2024); https://doi.org/10.1099/jmm.0.001934
/content/journal/jmm/10.1099/jmm.0.001934
/content/journal/jmm/10.1099/jmm.0.001934
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