GEO DataSets

(Submitter supplied) RNA-sequencing (RNA-Seq) is a precise tool to analyze global transcriptional changes, develop biomarkers, and decipher pathogenic mechanisms. We performed RNA-Seq of urinary cells to investigate gene expression patterns and pathways and whether urinary cell mRNA transcriptional profiles are enriched for biopsy transcriptional profiles.

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

57 Samples

Download data: TXT

(Submitter supplied) Acute rejection of human allografts has been viewed mostly through the lens of adaptive immunity, and the intragraft landscape of innate immunity genes has not been characterized in an unbiased fashion. We did RNA sequencing of 34 kidney allograft biopsy specimens from 34 adult recipients; 16 were categorized as Banff acute T-cell mediated rejection (TCMR) and 18 as normal. Computational analysis of intragraft mRNA transcriptome identified significantly higher abundance of mRNA for pattern recognition receptors in TCMR compared to normal biopsies, as well as increased expression of mRNAs for cytokines, chemokines, interferons, and caspases. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

34 Samples

Download data: TXT

(Submitter supplied) The enigmatic natural killer (NK) cells mediate spontaneous cell-mediated cytotoxicity and antibody-dependent cell-mediated cytotoxicity via cell surface Fc receptors. The dual functionality of NK cells may enable their participation in chronic active antibody-mediated rejection (CA-ABMR), wherein evidence for complement activation is inconsistent. We RNA sequenced 57 human kidney allograft biopsies to determine whether NK cell cytotoxicity pathway gene set enrichment is an attribute of CA-ABMR. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

57 Samples

Download data: TXT

(Submitter supplied) Herein, we used the whole exome GeoMX Digital Space Profiling platform to study five tubular and three glomerular regions of interest in the kidney graft biopsy from a patient with a chronic-active TCMR episode and in analogous areas from two different normal kidney control biopsies. All kidney sections were from paraffin blocks. Overall, inflammatory genes were significantly upregulated in the tubular areas of the TCMR biopsy and showed an enrichment for gene-ontology terms associated with T-cell activation, differentiation, and proliferation. more...

Organism:

Homo sapiens

Type:

Other

Platform:

GPL24676

19 Samples

Download data: CSV, DCC

(Submitter supplied) Intimal arteritis is known to be a negative prognostic factor for kidney allograft survival. Although Banff classification assesses isolated v-lesion (IV) as a T-cell mediated rejection, its origin and significance remain unclear. To help resolve if IV truly represents acute rejection, molecular study was performed. Transcriptome of early IV, T cell-mediated vascular rejection (TCMRV) and nonrejection histologic findings was compared using microarrays (Illumina Human HT-12 v4 Expression BeadChips). more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

18 Samples

Download data: TXT

(Submitter supplied) In this proof-of-concept study, spatial transcriptomics combined with public single-cell RNA sequencing data were used to explore the potential of this technology to study kidney allograft rejection. We aimed to map gene expression patterns within diverse pathological states by examining biopsies classified across non-rejection, T cell-mediated acute rejection, and interstitial fibrosis and tubular atrophy (IFTA). more...

Organism:

Homo sapiens

Type:

Other

Platform:

GPL24676

4 Samples

Download data: MTX, TSV

(Submitter supplied) Kidney transplant recipients are currently treated with nonspecific immunosuppressants that cause severe systemic side effects. Current immunosuppressants were developed based on their effect on T-cell activation rather than the underlying mechanisms driving alloimmune responses. Thus, understanding the role of the intragraft microenvironment will help us identify more directed therapies with lower side effects. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL20795

3 Samples

Download data: MTX, TSV

(Submitter supplied) Polyoma virus nephropathy (PVAN) is a common cause of kidney allograft dysfunction and loss. Microscopic descriptions of PVAN are very similar to T-cell mediated rejection (TCMR) and have unclear underlying molecular mechanisms. To identify PVAN-specific gene expression, we analyzed 162 kidney biopsies with and without PVAN for global gene expression. Unsupervised hierarchical clustering analysis of all 162 biopsies revealed high similarity between PVAN and TCMR gene expression. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

168 Samples

Download data: CEL

(Submitter supplied) Kidney transplant injury processes are associated with molecular changes in renal tissue, primarily related to immune cell activation and infiltration. How these processes are reflected by molecular alterations in circulating immune cells is poorly understood. We performed RNA-sequencing on 384 biobanked blood samples from four transplant centers, taken at time of a kidney allograft biopsy, selected for their phenotype (acute T cell- and antibody-mediated rejection, polyomavirus-associated nephropathy, and control). more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL20301

384 Samples

Download data: CSV

(Submitter supplied) Single nucleus inDrops to profile adult human kidney

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL16791

1 Sample

Download data: TXT

(Submitter supplied) Kidney transplantation offers the best survival and quality of life for patients’ with end-stage kidney disease. The major barrier to successful long-term transplantation is the host’s immune response to alloantigens’ causing rejection of the transplant. The complexity of this immune response in kidney transplantation is still not fully understood and effective treatment strategies are needed. To better understand rejection at the molecular and cellular level we characterized 4,487 cells from a single biopsy core from a kidney transplant undergoing mixed rejection using single cell RNA sequencing.

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platforms:

GPL18573 GPL16791

7 Samples

Download data: TXT

(Submitter supplied) Chronic T-cell mediated rejection (TCMR) is characterized by the reduction of vessel lumen with marked intimal thickening, fibrous hyperplasia and a strong component of leukocyte infiltrate. Aim of our work was the study of gene expression profile in renal TCMR biopsies. We performed transcriptomics study using RNA extracted from archival formalin-fixed and paraffin-embedded (FFPE) renal biopsies obtained from patients with chronic and acute TCMR. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL14951

76 Samples

Download data: TXT

(Submitter supplied) Human biopsies were collected from kidney transplant recipients in 4 different european centers in the context of BIOMARGIN study. We used TaqMan™ Advanced miRNA Human A and B Cards to quantitate 754 miRNAs expression according to patient outcome ; ie patient presenting Microvascular Inflammation (MVI) or No MVI .

Organism:

Homo sapiens

Type:

Other

Platform:

GPL30379

88 Samples

Download data: TXT

(Submitter supplied) The authors report that in INTERCOM, a prospective international study of 300 kidney transplant biopsies, a microarray-based molecular score for T cell-mediated rejection changed the assessment of 26% of all biopsies, illustrating the potential of precision diagnostics to impact practice.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

306 Samples

Download data: CEL

(Submitter supplied) Histologic diagnosis of T cell-mediated rejection in kidney transplant biopsies has limited reproducibility because it is based on non-specific lesions using arbitrary rules that are subject to differing interpretations. We used microarray results from 403 indication biopsies previously given histologic diagnoses to develop a molecular classifier that assigned a molecular T cell-mediated rejection score to each biopsy. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL570

411 Samples

Download data: CEL

(Submitter supplied) Banff 2019 update of kidney allograft pathology excluded isolated tubulitis without interstitial inflammation (ISO-T) from category of borderline (suspicious) for acute T cell-mediated rejection due to its proposed benign clinical outcome. However, molecular assessment of ISO-T has not been explored yet. ISO-T or interstitial inflammation with tubulitis (I+T) were diagnosed in indication biopsies within first 14 postoperative days. more...

Organism:

Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platform:

GPL24676

16 Samples

Download data: TXT

(Submitter supplied) To unveil the molecular mechanisms underlying TCMR, we utilized spatial transcriptomics on post-transplant TCMR and non-TCMR patients. Contrary to the prevailing T cell-centric view, our findings reveal uniform inflammatory responses across glomerular and tubulointerstitial regions in TCMR.

Organism:

Homo sapiens

Type:

Other

Platform:

GPL24676

12 Samples

Download data: DCC

(Submitter supplied) Chronic antibody-mediated rejection (CAMR) represents the main cause of kidney graft loss, but its pathogenesis is unclear. In order to uncover the molecular mechanisms underlying this condition, we characterized the molecular signature of circulating peripheral blood mononuclear cells and, separately, of CD4+ T lymphocytes isolated from CAMR patients compared to kidney transplant recipients with normal graft function and histology. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL6480

10 Samples

Download data: TXT

(Submitter supplied) Chronic antibody-mediated rejection (CAMR) represents the main cause of kidney graft loss, but its pathogenesis is unclear. In order to uncover the molecular mechanisms underlying this condition, we characterized the molecular signature of circulating peripheral blood mononuclear cells and, separately, of CD4+ T lymphocytes isolated from CAMR patients compared to kidney transplant recipients with normal graft function and histology. more...

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by array

Platform:

GPL16770

9 Samples

Download data: TXT

(Submitter supplied) Chronic antibody-mediated rejection (CAMR) represents the main cause of kidney graft loss, but its pathogenesis is unclear. In order to uncover the molecular mechanisms underlying this condition, we characterized the molecular signature of circulating peripheral blood mononuclear cells and, separately, of CD4+ T lymphocytes isolated from CAMR patients compared to kidney transplant recipients with normal graft function and histology. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL6480

18 Samples

Download data: TXT