The human cancer and stem cell marker podocalyxin interacts with the glucose-3-transporter in malignant pluripotent stem cells
| Autor: | Jung M. Lee, William M. Schopperle, William C. DeWolf |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Pluripotent Stem Cells
Sialoglycoproteins Cell Biophysics Biology Stem cell marker Biochemistry Embryonal carcinoma chemistry.chemical_compound Cancer stem cell Cell Line Tumor Neoplasms medicine Biomarkers Tumor Humans Amino Acid Sequence RNA Small Interfering Induced pluripotent stem cell Molecular Biology Glucose Transporter Type 3 Cell Biology medicine.disease Cell biology medicine.anatomical_structure Podocalyxin chemistry Multipotent Stem Cell Gene Knockdown Techniques Neoplastic Stem Cells Stem cell |
| Zdroj: | Biochemical and biophysical research communications. 398(3) |
| ISSN: | 1090-2104 |
| Popis: | Podocalyxin, an integral plasma membrane cell-adhesion glycoprotein, is a marker of human pluripotent and multipotent stem cells. Podocalyxin is also a marker of many types of cancers and its expression correlates with an aggressive and poor-prognosis tumor phenotype. The function of podocalyxin in stem cells and malignant cells is unknown. Protein sequence data obtained from purified podocalyxin protein isolated from embryonal carcinoma cancer stem cells reveals peptide sequence data for the glucose-3-transporter. Protein-precipitation experiments of embryonal carcinoma protein extracts identify a podocalyxin/glucose-3-transporter protein complex. Cell imaging studies demonstrate co-localization of podocalyxin and glucose-3-transporter and confirm the interaction in vivo. Finally, siRNA podocalyxin-knockdown experiments show decreased expression levels of the glucose-3-transporter. These findings suggest a novel interaction of the glucose-3-transporter and the cell-adhesion protein podocalyxin. In pluripotent stem cells and in human cancer disease, podocalyxin may function in part to regulate and maintain the cell surface expression of the glucose-3-transporter. |
| Databáze: | OpenAIRE |
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