Single-cell analysis of ovarian cancer organoids identifies AGRIN as a metastasis driver
Researchers used patient-derived organoids and single-cell RNA sequencing to map tumor progression in high-grade serous ovarian cancer, identifying the proteoglycan AGRIN as a consistently upregulated gene along the metastatic axis. The study profiled tumor samples from seven patients across primary ovarian and omental metastatic sites, finding that AGRIN promotes cancer cell migration and invasion through extracellular matrix and integrin-associated pathways. The findings suggest AGRIN is a potential therapeutic target in a cancer type with poor long-term survival due to metastatic relapse.
A new preprint study published on bioRxiv used patient-derived organoids (PDOs) combined with single-cell RNA sequencing to investigate how high-grade serous ovarian carcinoma (HGSOC) progresses from primary tumors to metastatic sites. The researchers profiled PDOs and matched tumor tissue from both ovarian and omental disease sites in seven patients, reconstructing inferred trajectories of tumor evolution at single-cell resolution. This analysis revealed both conserved and patient-specific cellular states, and comparative trajectory analysis pinpointed gene expression programs associated with the metastatic transition. Among the genes consistently upregulated along the metastatic axis, AGRIN — a heparan sulfate proteoglycan involved in extracellular matrix signaling — emerged as a top candidate. Cell-cell communication analyses implicated AGRIN in signaling between epithelial tumor cells and stromal components, suggesting a role for mechanotransduction and integrin pathways in shaping metastatic behavior. Functional experiments using genetic depletion of AGRIN in ovarian cancer cell lines confirmed reduced migratory and invasive capacity, supporting a causal role. The authors argue that PDO-based single-cell approaches offer a scalable framework for therapeutic target discovery across cancer types.
What's missing
The study is a preprint and has not yet undergone peer review. The patient cohort is small (n=7), which limits statistical power and generalizability. Functional validation was performed in cell lines rather than in vivo models, leaving open questions about AGRIN's therapeutic relevance in living organisms. The study does not address whether AGRIN expression levels correlate with clinical outcomes such as survival or chemotherapy response in larger patient datasets. Mechanisms by which AGRIN could be pharmacologically targeted are not discussed.
What different sources said
- bioRxivCenter
Single-cell transcriptomics of heterogeneous patient-derived organoids reveals novel therapeutic targets in high-grade serous ovarian cancer
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