Study

Spatio-temporal analysis of prostate tumors in situ suggests pre-existence of treatment-resistant clones

Study ID Alternative Stable ID Type
EGAS00001006113 Other

Study Description

The molecular mechanisms underlying lethal castration-resistant prostate cancer remain poorly understood, with intratumoral heterogeneity a likely contributing factor. To examine the temporal aspects of resistance, we analyzed tumor heterogeneity in needle biopsies collected before and after treatment with androgen deprivation therapy. By doing so, we were able to couple clinical responsiveness and morphological information such as Gleason score to transcriptome-wide data. Our data-driven analysis of transcriptomes identified several distinct intratumoral cell populations, characterized by their unique gene expression profiles. Strikingly, certain cell populations present before treatment exhibited gene expression profiles that matched those of resistant tumor cell clusters, present after treatment. We confirmed that these clusters were resistant by the localization of active androgen receptors to the nuclei in cancer cells post-treatment. Our data also demonstrated that most stromal cells adjacent to resistant clusters do not express the androgen receptor, and we identified ... (Show More)

Study Datasets 1 dataset.

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Dataset ID Description Technology Samples
EGAD00001008636
Spatial transcriptome sequencing data from prostate cancer needle biopsies. Dataset contains biopsies from before and after androgen deprivation therapy of 3 patients with 4 biopsies per patient in total. 2 sections (replicates) are taken from each biopsy.
NextSeq 550 24

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