Single-cell chromatin accessibility landscape of T cell-mediated rejection and BK polyomavirus-associated nephropathy...

Area of Science:

• Nephrology
• Immunology
• Genomics

Background:

• Kidney transplantation faces challenges from T cell-mediated rejection (TCMR) and BK polyomavirus-associated nephropathy (BKPyVAN).
• Accurate diagnosis is crucial for timely intervention, but molecular understanding remains limited.
• Developing novel diagnostic strategies requires deeper insights into the molecular underpinnings of these conditions.

Purpose of the Study:

• To investigate the chromatin landscape of kidney samples with TCMR or BKPyVAN at the single-cell level.
• To identify distinct cell population dynamics and chromatin changes associated with each condition.
• To uncover upstream regulators of chromatin modifications in TCMR and BKPyVAN.

Main Methods:

• Single-cell assay for transposase-accessible chromatin sequencing (scATAC-seq) was applied to kidney transplant samples.
• Analysis focused on chromatin accessibility at the single-cell level.
• Computational methods were used to identify cell populations, pathways, and regulatory elements.

Main Results:

• scATAC-seq revealed distinct cell population dynamics in TCMR and BKPyVAN samples.
• Enriched pathways associated with chromatin changes were identified for both conditions.
• Upstream transcriptional and epigenetic regulators were analyzed for each cell population.

Conclusions:

• This study provides a high-resolution view of the chromatin landscape in kidney transplant complications.
• Findings offer valuable resources for characterizing the molecular features of TCMR and BKPyVAN.
• The identified regulators shed light on molecular mechanisms underlying these transplant-related diseases.