Proteomic characterization of the pseudocapsule of clear cell renal cell carcinoma in VHL disease reveals a distinct microenvironment at the tumor boundary zone.

ABSTRACT: Von Hippel-Lindau (VHL) disease describes a hereditary tumor predisposition syndrome, caused by germline mutations in the VHL tumor suppressor gene, resulting in the functional loss of the VHL protein (pVHL). pVHL loss translates into a pseudo-hypoxic state that drives clear cell renal cell carcinoma (ccRCC) development. ccRCC tumors frequently form a pseudocapsule (PC) at the tumor boundary. This study describes the first comprehensive proteomic analysis of the PC in ccRCC patients with hereditary VHL inactivation, revealing a distinctive matrisomal signature. We conducted a deep, mass spectrometry-based proteomic analysis of 130 formalin-fixed paraffin-embedded (FFPE) ccRCC samples, comprising 54 tumor, 45 PC, and 31 non-malignant adjacent tissue (NAT) specimens from 34 patients. The PC

SUBMITTER: Feilen T 

PROVIDER: S-EPMC12446972 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature