Abstract
Pancreatic ductal adenocarcinoma (PDAC) has a grim prognosis with <5% survivors after 5 years. High expression levels of ADAM8, a metalloprotease disintegrin, are correlated with poor clinical outcome. We show that ADAM8 expression is associated with increased migration and invasiveness of PDAC cells caused by activation of ERK1/2 and higher MMP activities. For biological function, ADAM8 requires multimerization and associates with β1 integrin on the cell surface. A peptidomimetic ADAM8 inhibitor, BK-1361, designed by structural modelling of the disintegrin domain, prevents ADAM8 multimerization. In PDAC cells, BK-1361 affects ADAM8 function leading to reduced invasiveness, and less ERK1/2 and MMP activation. BK-1361 application in mice decreased tumour burden and metastasis of implanted pancreatic tumour cells and provides improved metrics of clinical symptoms and survival in a Kras(G12D)-driven mouse model of PDAC. Thus, our data integrate ADAM8 in pancreatic cancer signalling and validate ADAM8 as a target for PDAC therapy.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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ADAM Proteins / antagonists & inhibitors
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ADAM Proteins / metabolism*
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Animals
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Blotting, Western
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Carcinoma, Pancreatic Ductal / enzymology
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Carcinoma, Pancreatic Ductal / pathology
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Cell Line, Tumor
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Cell Movement / drug effects
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Extracellular Space / metabolism
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Focal Adhesion Protein-Tyrosine Kinases / metabolism
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Gene Knockdown Techniques
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Humans
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Hydroxamic Acids / pharmacology
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Hydroxamic Acids / therapeutic use
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Integrin beta1 / metabolism
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Kaplan-Meier Estimate
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Matrix Metalloproteinase 14 / metabolism
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Matrix Metalloproteinase 2 / metabolism
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Membrane Proteins / antagonists & inhibitors
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Membrane Proteins / metabolism*
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Mice
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Molecular Targeted Therapy*
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Neoplasm Invasiveness
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Pancreatic Neoplasms / drug therapy*
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Pancreatic Neoplasms / enzymology
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Pancreatic Neoplasms / pathology
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Peptides, Cyclic / pharmacology
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Peptides, Cyclic / therapeutic use
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Phosphorylation / drug effects
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Protein Binding / drug effects
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Protein Multimerization / drug effects
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Protein Processing, Post-Translational
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Signal Transduction / drug effects
Substances
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Hydroxamic Acids
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Integrin beta1
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Membrane Proteins
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Peptides, Cyclic
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Focal Adhesion Protein-Tyrosine Kinases
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ADAM Proteins
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ADAM8 protein, human
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Matrix Metalloproteinase 2
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Matrix Metalloproteinase 14