Search results for: Recombinant Human PEDF [from HEK cells] Proteins





Expression and purification of functional recombinant human pigment epithelium-derived factor (PEDF) secreted by the yeast Pichia pastoris.
Pigment epithelium-derived factor (PEDF) combines neurotrophic, neuroprotective, anti-angiogenic, anti-tumor and neural stem cell self-renewal properties in a single molecule, making this protein a valuable potential therapeutic agent. We herein analyzed the expression of human recombinant full-length PEDF, and its N- and C-terminal regions (amino acids 1-243 and 195-418, respectively) in three mammalian cell lines (HEK-293T, COS-1, and 26HCMsv), and in the yeast Pichia pastoris. The highest production of recombinant PEDF was achieved in P. pastoris which secreted approximately 30 microg of full-length rPEDF, and 47 microg of C-terminal/ml of culture medium. Full-length rPEDF was purified by one-step Ni-chelating high-performance liquid chromatography, recovering almost 70% of secreted rPEDF with a purity of 98.6%. The C-terminal region of PEDF was isolated by low-pressure liquid chromatography, recovering around 4% of the recombinant molecule with a purity of 98%. The N-terminal region of PEDF was not secreted by any expression system assayed. The two isolated recombinant PEDF polypeptides inhibited in vitro endothelial cell migration, and full-length rPEDF also increased cerebellar granule cell survival, thus demonstrating their biological activity. These polypeptides can be used to investigate the therapeutic role of PEDF in cancer, neurodegenerative and ocular diseases, and stem cell-based therapies.
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