Abstract
The biology of metastatic pancreatic ductal adenocarcinoma (PDAC) is distinct from that of the primary tumor due to changes in cell plasticity governed by a distinct transcriptome. Therapeutic strategies that target this distinct biology are needed. We detect an upregulation of the neuronal axon guidance molecule Netrin-1 in PDAC liver metastases that signals through its dependence receptor (DR), uncoordinated-5b (Unc5b), to facilitate metastasis in vitro and in vivo. The mechanism of Netrin-1 induction involves a feedforward loop whereby Netrin-1 on the surface of PDAC-secreted extracellular vesicles prepares the metastatic niche by inducing hepatic stellate cell activation and retinoic acid secretion that in turn upregulates Netrin-1 in disseminated tumor cells via RAR/RXR and Elf3 signaling. While this mechanism promotes PDAC liver metastasis, it also identifies a therapeutic vulnerability, as it can be targeted using anti-Netrin-1 therapy to inhibit metastasis using the Unc5b DR cell death mechanism.
Original language | English |
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Article number | 113369 |
Pages (from-to) | 113369 |
Journal | Cell Reports |
Volume | 42 |
Issue number | 11 |
DOIs | |
State | Published - Nov 28 2023 |
Keywords
- Humans
- Netrin-1
- Retinoids
- Hepatic Stellate Cells/metabolism
- Cell Line, Tumor
- Pancreatic Neoplasms/pathology
- Carcinoma, Pancreatic Ductal/pathology
- Liver Neoplasms/metabolism
- Netrin Receptors
- DNA-Binding Proteins
- Transcription Factors
- Proto-Oncogene Proteins c-ets
- hepatic stellate cells
- extracellular vesicles
- metastatic niche
- pancreatic cancer
- retinoic acid
- Elf3
- metastasis
- CP: Cancer
- Unc5b
- axon guidance