Title : Galectin-3 promotes chronic activation of K-Ras and differentiation block in malignant thyroid carcinomas.

Pub. Date : 2010 Aug

PMID : 20682656






6 Functional Relationships(s)
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1 Therefore, it is not known whether chronically active Ras contributes to thyroid carcinoma cell proliferation, although galectin-3 (Gal-3), which is strongly expressed in thyroid carcinomas but not in benign tumors or normal glands, is known to act as a K-Ras chaperone that stabilizes and drives K-Ras.GTP nanoclustering and signal robustness. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus
2 Therefore, it is not known whether chronically active Ras contributes to thyroid carcinoma cell proliferation, although galectin-3 (Gal-3), which is strongly expressed in thyroid carcinomas but not in benign tumors or normal glands, is known to act as a K-Ras chaperone that stabilizes and drives K-Ras.GTP nanoclustering and signal robustness. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus
3 Thyroid carcinoma cells strongly expressing Gal-3 showed high levels of K-Ras.GTP expression, and K-Ras.GTP transmitted strong signals to extracellular signal-regulated kinase. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus
4 Thyroid carcinoma cells strongly expressing Gal-3 showed high levels of K-Ras.GTP expression, and K-Ras.GTP transmitted strong signals to extracellular signal-regulated kinase. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus
5 FTS disrupted interactions between Gal-3 and K.Ras, strongly reduced K-Ras.GTP and phospho-extracellular signal-regulated kinase expression, and enhanced the expression of the cell cycle inhibitor p21 as well as of the thyroid transcription factor 1, which is involved in thyroid cell differentiation. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus
6 We conclude that wild-type K-Ras.GTP in association with Gal-3 contributes to thyroid carcinoma malignancy and that Ras inhibition might be a useful treatment strategy against these deadly tumors. Guanosine Triphosphate lectin, galactose binding, soluble 3 Mus musculus