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- W1595480129 abstract "J. Neurochem. (2010) 115, 759–770. Abstract 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 (GFRα1) are over-expressed in human gliomas. We have previously reported that human gliomas express high levels of GFRα1b, an alternatively spliced isoform of GFRα1. However, the functional significance of GFRα1b in glioma behaviors is currently unknown. In this study, we have designed isoform-specific small-interfering RNA to knockdown the highly homologous GFRα1a or GFRα1b isoform efficiently in malignant C6 glioma cells. Unexpectedly, the knockdown of GFRα1b but not GFRα1a induced cell elongation and inhibited C6 cell migration and invasion in vitro. In addition, GFRα1b 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 GFRα1b knockdown were attenuated by small-interfering RNA -resistant GFRα1b but not GFRα1a, further demonstrating the specific role of GFRα1b 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 GFRα1b is involved in glioma migration through glial cell line-derived neurotrophic factor –GFRα1b-NCAM signaling complex and modulation of RhoA expression." @default.
- W1595480129 created "2016-06-24" @default.
- W1595480129 creator A5058383517 @default.
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- W1595480129 date "2010-09-28" @default.
- W1595480129 modified "2023-09-23" @default.
- W1595480129 title "A specific isoform of glial cell line-derived neurotrophic factor family receptor alpha 1 regulates RhoA expression and glioma cell migration" @default.
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- W1595480129 doi "https://doi.org/10.1111/j.1471-4159.2010.06975.x" @default.
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