Distinct mesenchymal cell states mediate prostate cancer progression

Author:

Pakula Hubert,Omar MohamedORCID,Carelli Ryan,Pederzoli Filippo,Fanelli Giuseppe Nicolò,Pannellini Tania,Van Emmenis Lucie,Rodrigues Silvia,Fidalgo-Ribeiro Caroline,Nuzzo Pier V.,Brady Nicholas J.,Jere Madhavi,Unkenholz Caitlin,Alexanderani Mohammad K.,Khani Francesca,de Almeida Francisca Nunes,Abate-Shen Cory,Greenblatt Matthew B,Rickman David S.,Barbieri Christopher E.,Robinson Brian D.,Marchionni Luigi,Loda Massimo

Abstract

SummaryAlterations in tumor stroma influence prostate cancer progression and metastatic potential. However, the molecular underpinnings of this stromal-epithelial crosstalk are largely unknown. Here, we compare mesenchymal cells from four genetically engineered mouse models (GEMMs) of prostate cancer representing different stages of the disease to their wild-type (WT) counterparts by single-cell RNA sequencing (scRNA-seq) and, ultimately, to human tumors with comparable genotypes. We identified 8 transcriptionally and functionally distinct stromal populations responsible for common and GEMM-specific transcriptional programs. We show that stromal responses are conserved in mouse models and human prostate cancers with the same genomic alterations. We noted striking similarities between the transcriptional profiles of the stroma of murine models of advanced disease and those of of human prostate cancer bone metastases. These profiles were then used to build a robust gene signature that can predict metastatic progression in prostate cancer patients with localized disease and is also associated with progression-free survival independent of Gleason score. Taken together, this offers new evidence that stromal microenvironment mediates prostate cancer progression, further identifying tissue-based biomarkers and potential therapeutic targets of aggressive and metastatic disease.

Publisher

Cold Spring Harbor Laboratory

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