Linked Life Data

20807316

Source:http://linkedlifedata.com/resource/pubmed/id/20807316

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2010-11-2
pubmed:abstractText
Malignant gliomas are highly invasive neuroepithelial tumors where the tendency to invade and migrate away from the primary tumor mass is thought to be a leading cause of tumor recurrence and treatment failures. Autocrine signals produced by secreted factors that signal through receptors on the tumor are known to contribute to the invasiveness. Glial cell line-derived neurotrophic factor and GDNF family receptor alpha 1 (GFR?1) are over-expressed in human gliomas. We have previously reported that human gliomas express high levels of GFR?1b, an alternatively spliced isoform of GFR?1. However, the functional significance of GFR?1b in glioma behaviors is currently unknown. In this study, we have designed isoform-specific small-interfering RNA to knockdown the highly homologous GFR?1a or GFR?1b isoform efficiently in malignant C6 glioma cells. Unexpectedly, the knockdown of GFR?1b but not GFR?1a induced cell elongation and inhibited C6 cell migration and invasion in vitro. In addition, GFR?1b was found to regulate the expression of RhoA small GTPase, which was required for migration of C6 cells. The decreases in RhoA expression and cell migration after GFR?1b knockdown were attenuated by small-interfering RNA -resistant GFR?1b but not GFR?1a, further demonstrating the specific role of GFR?1b in glioma migration. Interestingly, the knockdown of NCAM but not receptor tyrosine kinase Ret resulted in the reduction of RhoA expression and C6 cell migration. Taken together, these unanticipated results indicate that GFR?1b is involved in glioma migration through glial cell line-derived neurotrophic factor -GFR?1b-NCAM signaling complex and modulation of RhoA expression.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1471-4159
pubmed:author
pubmed:copyrightInfo
© 2010 The Authors. Journal of Neurochemistry © 2010 International Society for Neurochemistry.
pubmed:issnType
Electronic
pubmed:volume
115
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
759-70
pubmed:meshHeading
pubmed-meshheading:20807316-Animals, pubmed-meshheading:20807316-Blotting, Western, pubmed-meshheading:20807316-Cell Division, pubmed-meshheading:20807316-Cell Movement, pubmed-meshheading:20807316-Fluorescent Antibody Technique, pubmed-meshheading:20807316-Glial Cell Line-Derived Neurotrophic Factor, pubmed-meshheading:20807316-Glial Cell Line-Derived Neurotrophic Factor Receptors, pubmed-meshheading:20807316-Glioma, pubmed-meshheading:20807316-Isomerism, pubmed-meshheading:20807316-Microscopy, Confocal, pubmed-meshheading:20807316-Neoplasm Invasiveness, pubmed-meshheading:20807316-Neural Cell Adhesion Molecules, pubmed-meshheading:20807316-RNA, Small Interfering, pubmed-meshheading:20807316-Rats, pubmed-meshheading:20807316-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:20807316-Transfection, pubmed-meshheading:20807316-rhoA GTP-Binding Protein
pubmed:year
2010
pubmed:articleTitle
A specific isoform of glial cell line-derived neurotrophic factor family receptor alpha 1 regulates RhoA expression and glioma cell migration.
pubmed:affiliation
Department of Biochemistry, National University of Singapore, Singapore.
pubmed:publicationType
Journal Article