PXD069630-1

PXD069630 is an original dataset announced via ProteomeXchange.

Title	Spatial proteomics of ovarian cancer precursors delineates early disease changes and drug targets
Description	High-grade serous ovarian cancer (HGSOC) is often detected at an advanced stage, where curative treatment options are limited. Recent advances in ultrasensitive mass spectrometry-based spatial proteomics have provided a unique opportunity to uncover molecular drivers of early tumorigenesis and novel therapeutic targets. Here, we present a comprehensive proteomic analysis of serous tubal intraepithelial carcinoma (STIC), the HGSOC precursor lesion, and concurrent invasive carcinoma, covering more than 10,000 proteins from ultra-low input archival tissue. STIC and HGSOC showed highly similar proteomes, clustering into two subtypes with distinct tumor immune microenvironments and common remodelling of the extracellular matrix. We discovered cell-of-origin signatures from secretory fallopian tube epithelial cells in STICs and identified early dysregulated pathways of therapeutic relevance. Targeting cholesterol biosynthesis by inhibiting the terminal steps via DHCR7 showed therapeutic effects in ovarian cancer cell lines and synergized with standard-of-care carboplatin treatment. This study demonstrates the power of spatially resolved quantitative proteomics in understanding early carcinogenesis and provides a rich resource for biomarker and drug target research.
HostingRepository	PRIDE
AnnounceDate	2025-10-22
AnnouncementXML	Submission_2025-10-22_15:43:56.428.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Fabian Coscia
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: NEWT:9606;
ModificationList	No PTMs are included in the dataset
Instrument	timsTOF Ultra

Revision	Datetime	Status	ChangeLog Entry
0	2025-10-19 07:03:12	ID requested
⏵ 1	2025-10-22 15:43:56	announced

Dataset with its publication pending

submitter keyword: STIC, fallopian tube,Ovarian cancer

Dr. Fabian Coscia
contact affiliation	Max Delbrück Center Robert-Rössle-Straße 10 13125 Berlin, Germany
contact email	fabian.coscia@mdc-berlin.de
lab head
Fabian Coscia
contact affiliation	Max Delbrück Center
contact email	fabian.coscia@mdc-berlin.de
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2025/10/PXD069630

PRIDE project URI

• PRIDE
  1. PXD069630
     1. Label: PRIDE project
     2. Name: Spatial proteomics of ovarian cancer precursors delineates early disease changes and drug targets