TrkC binds to the type II TGF-β receptor to suppress TGF-β signaling

Growing evidence suggests that overexpression of TrkC, a member of the Trk family of neurotrophin receptors, could drive tumorigenesis, invasion and metastatic capability in cancer cells. However, relatively little is known about the mechanism of TrkC-mediated oncogenesis. The TrkC gene is a partner...

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Veröffentlicht in:Oncogene 2007-12, Vol.26 (55), p.7684-7691
Hauptverfasser: Jin, W, Yun, C, Kwak, M-K, Kim, T-A, Kim, S-J
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container_title Oncogene
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creator Jin, W
Yun, C
Kwak, M-K
Kim, T-A
Kim, S-J
description Growing evidence suggests that overexpression of TrkC, a member of the Trk family of neurotrophin receptors, could drive tumorigenesis, invasion and metastatic capability in cancer cells. However, relatively little is known about the mechanism of TrkC-mediated oncogenesis. The TrkC gene is a partner of the Tel-TrkC (ETV6-NTRK3) chimeric tyrosine kinase, a potent oncoprotein expressed in tumors derived from multiple cell lineages. Recently, we have shown that ETV6-NTRK3 suppresses transforming growth factor- β (TGF- β ) signaling by directly binding to the type II TGF- β receptor (T β RII). Here, we report that expression of TrkC also suppresses TGF- β -induced Smad2/3 phosphorylation and transcriptional activation. Silencing TrkC expression by small interfering RNA in the highly metastatic 4T1 mammary tumor cell line expressing endogenous TrkC significantly enhanced TGF- β -induced Smad2/3 phosphorylation and restored TGF- β growth inhibitory activity. In contrast, expression of TrkC in 67NR cells, in which TrkC is not expressed, suppressed TGF- β transcriptional activation. Moreover, we show that TrkC directly binds to the T β RII, thereby preventing it from interacting with the type I TGF- β receptor (T β RI). These results indicate that TrkC is an inhibitor of TGF- β tumor suppressor activity.
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source MEDLINE; Nature; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature - Complete Springer Journals
subjects Animals
Apoptosis
Biological and medical sciences
Cancer
Care and treatment
Cell Biology
Cell Line, Tumor
Cell physiology
Cell receptors
Cell structures and functions
Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes
Cellular signal transduction
Fundamental and applied biological sciences. Psychology
Gene silencing
Genetic aspects
Growth factor receptors
Health aspects
Human Genetics
Humans
Internal Medicine
Kinases
Mammary gland
Medicine
Medicine & Public Health
Metastases
Metastasis
Mice
Miscellaneous
Molecular and cellular biology
Neurotrophin receptors
NIH 3T3 Cells
Oncology
original-article
Phosphorylation
Protein-Serine-Threonine Kinases - metabolism
Protein-tyrosine kinase
Receptor, trkC - antagonists & inhibitors
Receptor, trkC - genetics
Receptor, trkC - metabolism
Receptors, Transforming Growth Factor beta - metabolism
RNA, Small Interfering - pharmacology
Signal Transduction
siRNA
Smad2 protein
Smad2 Protein - metabolism
Smad3 Protein - metabolism
Transcription activation
Transcriptional Activation
Transforming Growth Factor beta - antagonists & inhibitors
Transforming Growth Factor beta - metabolism
Transforming Growth Factor beta - pharmacology
Transforming growth factor-b
TrkC receptors
Tumor suppressor genes
Tumor Suppressor Proteins - antagonists & inhibitors
Tumor Suppressor Proteins - metabolism
Tumor Suppressor Proteins - pharmacology
Tumorigenesis
Tumors
title TrkC binds to the type II TGF-β receptor to suppress TGF-β signaling
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