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ABSTRACT: Post-Kidney Transplant Urine Microbiome Characterization

PROVIDER: PRJNA1010193 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25780378_1.fastq.gz	Fastqsanger.gz
	SRR25780378_2.fastq.gz	Fastqsanger.gz
	SRR25780379_1.fastq.gz	Fastqsanger.gz
	SRR25780379_2.fastq.gz	Fastqsanger.gz
	SRR25780380_1.fastq.gz	Fastqsanger.gz

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Identifying urinary RNA from prospective urine as non-invasive biomarkers for kidney transplant patients

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Identifying urinary RNA from biopsy associated urine as non-invasive biomarkers for kidney transplant patients

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Pre-Transplant T-Cell Clonal Analysis Identifies CD8+ Donor Reactive Clones That Contribute To Kidney Transplant Rejection Following Two Different Induction Modalities

Project description:Introduction: Responses to allogeneic human leukocyte antigen (HLA) molecules limit the survival of transplanted organs. The changes in T-cell alloreactivity that contribute to this process, however, are not fully understood. We defined a set of donor reactive T-cell clones (DRTC) with the goal to elucidate signatures of kidney allograft rejection. Methods: DRTC were identified pretransplant using an anti-donor mixed lymphocyte reaction assay: CFSE-diluting CD4+ and CD8+ DRTC were flow-sorted, and the TCR sequences were identified using Adaptive Immunosequencing. DRTC were then tracked in post-transplant biopsies, blood, and urine samples in a cohort of kidney transplant recipients. Results: In patients with an abnormal biopsy, the majority of CD8+ DRTC found within the allograft were detected in the circulating pre-transplant repertoire. Circulating CD8+ DRTC were more abundant pre- and post-transplant in patients that received non-lymphodepletional induction and developed an abnormal biopsy when compared to stable patients. Additionally, DRTC were detected as early as two weeks post-transplant in the urine of some patients, with some of these clones subsequently identified in follow-up kidney biopsy samples. Discussion: The findings of our study add to our understanding of T-cell alloreactivity following kidney transplantation and provide evidence for the role of pre-defined alloreactive T-cells in the development of allograft rejection.

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Project description:Kidney transplantation is the treatment of choice for patients with end-stage chronic kidney disease (ESKD). Despite the usefulness of transplantation as replacement therapy, long-term graft survival represents a major challenge for transplant immunology. Although nowadays there has been an advance in understanding immunological mechanisms mediating rejection, and the improvement of immunomodulation therapies, there are still underlying molecular processes marking an important variability among patients, and presumably influencing allograft rejection. With our analysis we explored differences in gene expression by Next Generation Sequencing implementing RNA-Seq in biopsies, blood and urine from kidney transplant patients with acute and chronic rejection. For this, we performed an intra-outcome analysis simultaneously in acute and chronic rejection, with which we sought: 1. To identify differences in gene expression between peripheral blood vs renal tissue and peripheral blood vs urine in acute rejection and chronic rejection; 2. To identify the level of agreement in gene expression between renal tissue and urine in acute rejection and chronic rejection and 3. To identify genes and biological processes associated with acute rejection and chronic rejection that could be potentially detected in blood, and simultaneously in urine and biopsy in acute rejection and in chronic rejection.

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