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Area of Science:

  • Oncology
  • Nephrology
  • Genomics

Background:

  • End-stage renal disease (ESRD) is linked to acquired cystic kidney disease (ACKD).
  • ACKD can progress to acquired cystic disease-associated renal cell carcinoma (ACD-RCC).
  • The cellular origins and molecular drivers of ACKD and ACD-RCC remain incompletely understood.

Purpose of the Study:

  • To comprehensively analyze the genomic, transcriptomic, and spatial characteristics of ACD-RCC.
  • To elucidate the cellular origins and developmental pathways of ACKD and associated ACD-RCC.
  • To identify key molecular and microenvironmental factors driving the pathogenesis of ACKD and ACD-RCC.

Main Methods:

  • Multi-omic analysis including genomics, transcriptomics, and spatial transcriptomics.
  • Comparative analysis of normal kidney tissue, ACKD cysts, and ACD-RCC.
  • Cellular lineage tracing and microenvironment characterization.

Main Results:

  • Demonstrated clonal expansion of a specific subset of proximal tubule cells.
  • Identified a pro-inflammatory microenvironment supporting cyst and tumor development.
  • Revealed distinct molecular signatures differentiating ACKD cysts from ACD-RCC.

Conclusions:

  • ACKD cysts and ACD-RCC originate from a common progenitor cell population.
  • An inflammatory microenvironment is crucial for the development of both ACKD and ACD-RCC.
  • These findings provide a framework for understanding kidney cystogenesis and tumorigenesis in ESRD.