Abstract: |
Pancreatic ductal adenocarcinoma (PDAC) is an increasingly diagnosed cancer that kills 90% of afflicted patients, with most patients receiving palliative chemotherapy. We identified neuronal pentraxin 1 (NPTX1) as a cancer-secreted protein that becomes overexpressed in human and murine PDAC cells during metastatic progression and identified adhesion molecule with Ig-like domain 2 (AMIGO2) as its receptor. Molecular, genetic, biochemical, and pharmacologic experiments revealed that secreted NPTX1 acts cell-autonomously on the AMIGO2 receptor to drive PDAC metastatic colonization of the liver—the primary site of PDAC metastasis. NPTX1–AMIGO2 signaling enhanced hypoxic growth and was critically required for hypoxia-inducible factor-1α (HIF1α) nuclear retention and function. NPTX1 is overexpressed in human PDAC tumors and upregulated in liver metastases. Therapeutic targeting of NPTX1 with a high-affinity monoclonal anti-body substantially reduced PDAC liver metastatic colonization. We thus identify NPTX1–AMIGO2 as druggable critical upstream regulators of the HIF1α hypoxic response in PDAC. Significance: We identified the NPTX1–AMIGO2 axis as a regulatory mechanism upstream of HIF1α-driven hypoxia response that promotes PDAC liver metastasis. Therapeutic NPTX1 targeting outperformed a common chemotherapy regimen in inhibiting liver metastasis and suppressed primary tumor growth in preclinical models, revealing a novel therapeutic strategy targeting hypoxic response in PDAC. © 2024 American Association for Cancer Research. |
Keywords: |
immunohistochemistry; controlled study; human tissue; protein expression; unclassified drug; human cell; gene deletion; splenectomy; cancer growth; nonhuman; liver neoplasms; gemcitabine; pancreas cancer; pancreatic neoplasms; pancreaticoduodenectomy; cell proliferation; c reactive protein; animal cell; mouse; animal; metabolism; animals; mice; cell viability; gene; gene overexpression; metastasis; apoptosis; gene expression; carcinoma, pancreatic ductal; animal experiment; animal model; nerve tissue proteins; c-reactive protein; immunofluorescence; pathology; cell line, tumor; angiogenesis; proteomics; enzyme linked immunosorbent assay; histology; cancer mortality; hypoxia; ubiquitination; genetic transfection; liver tumor; escherichia coli; pancreas tumor; tumor cell line; western blotting; scoring system; neoplasm metastasis; immunoprecipitation; pimonidazole; eosin; hematoxylin; dye; tumor growth; autopsy; drug therapy; doxycycline; ubiquitin protein ligase e3; tetracycline; hypoxia inducible factor 1alpha; nerve protein; fluorescence activated cell sorting; cell invasion; bioluminescence; phage display; rank sum test; student t test; hif1a protein, human; hypoxia-inducible factor 1, alpha subunit; stoichiometry; immunization; tumor microenvironment; saponin; short tandem repeat; glucose metabolism; pancreatic ductal carcinoma; metastatic progression; metastatic colonization; genomic copy number; tumor spheroid; humans; human; article; rna sequencing; cell growth assay; differential expression analysis; polyvinylidene fluoride; 4',6 diamidino 2 phenylindole; transwell assay; adhesion molecule with ig like domain 2; neuronal pentraxin 1; neuronal pentraxin; anc1 lm3 cell; burkholderia pseudomallei; hypoxia cell growth assay; in vivo crispr competition assay; in vivo devd luciferase apoptosis assay; in vivo hypoxia pimonidazole reporter assay; in vivo spontaneous metastasis assay; ki 67 immunofluorescence staining; kpc lm2 cell; liver metastasis assay; luciferin based apoptosis assay; mantel cox log rank test; mia paca-2 cell; mst assay; neuronal cell death; nuclear retention; orthotopic liver metastatic progression capacity; proximity ligation assay; stable cell line
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