Abstract
SMAD4 constrains progression of Pten-null prostate cancer and serves as a common downstream node of transforming growth factor β (TGFβ) and bone morphogenetic protein (BMP) pathways. Here, we dissected the roles of TGFβ receptor II (TGFBR2) and BMP receptor II (BMPR2) using a Pten-null prostate cancer model. These studies demonstrated that the molecular actions of TGFBR2 result in both SMAD4-dependent constraint of proliferation and SMAD4-independent activation of apoptosis. In contrast, BMPR2 deletion extended survival relative to Pten deletion alone, establishing its promoting role in BMP6-driven prostate cancer progression. These analyses reveal the complexity of TGFβ-BMP signaling and illuminate potential therapeutic targets for prostate cancer.
Keywords:
BMPR2; PTEN; SMAD4; TGFBR2; bone metastasis; prostate cancer.
© 2018 Lu et al.; Published by Cold Spring Harbor Laboratory Press.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Animals
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Bone Morphogenetic Protein Receptors, Type II / genetics*
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Bone Morphogenetic Protein Receptors, Type II / metabolism*
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Bone Neoplasms / genetics
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Bone Neoplasms / secondary
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Disease Models, Animal
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Gene Deletion
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Gene Expression Profiling
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Gene Expression Regulation, Neoplastic
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Genotype
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Kaplan-Meier Estimate
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Male
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Mice
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Mice, Inbred C57BL
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PTEN Phosphohydrolase / genetics
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Prostatic Neoplasms / genetics
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Prostatic Neoplasms / physiopathology*
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Protein Serine-Threonine Kinases / genetics*
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Protein Serine-Threonine Kinases / metabolism*
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Receptor, Transforming Growth Factor-beta Type II
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Receptors, Transforming Growth Factor beta / genetics*
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Receptors, Transforming Growth Factor beta / metabolism*
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Signal Transduction*
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Smad4 Protein / genetics
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Smad4 Protein / metabolism
Substances
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Receptors, Transforming Growth Factor beta
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Smad4 Protein
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Protein Serine-Threonine Kinases
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Bone Morphogenetic Protein Receptors, Type II
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Receptor, Transforming Growth Factor-beta Type II
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PTEN Phosphohydrolase