title: Endothelium-induced proliferation and electrophysiological differentiation of human embryonic stem cell-derived neuronal precursors.
abstract: Neurogenesis occurs in a stem cell niche in which vascular elements, including endothelial cells (ECs), are thought to play an important role. Using co-culture experiments, we investigated the effect of ECs on proliferation and functional neuronal differentiation of human embryonic stem (ES) cellderived neuronal precursor cells (NPCs). NPCs were cultured for 5 days in medium containing fibroblast growth factor-2 (FGF-2), with or without ECs. FGF-2 and ECs were then removed, and NPCs were maintained in culture for additional periods. Compared to control NPC cultures, EC-treated NPC cultures showed increased cell proliferation at short intervals (5 days) after withdrawal of FGF-2 and larger tetrodotoxin-sensitive inward membrane currents at longer intervals (10-14 days), but a similar pattern of development of neuronal differentiation markers. The effects of ECs appeared to result from the release of soluble factors rather than from cell contact, because they were observed despite the physical separation of NPCs from ECs by a cell-impermeable membrane. These findings indicate that ECs can regulate the proliferation and electrophysiological neuronal differentiation of human NPCs.
authors.affiliation: Buck Institute for Age Research, Novato, CA 94945-0638, USA.
authors.forename: Bin
authors.initials: B
authors.lastname: Lai
authors.forename: Xiao Ou
authors.initials: XO
authors.lastname: Mao
authors.forename: David A
authors.initials: DA
authors.lastname: Greenberg
authors.forename: Kunlin
authors.initials: K
authors.lastname: Jin
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D018920:Coculture Techniques; D004594:Electrophysiology; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000187:drug effects; D004727:Endothelium / Q000166:cytology* / Q000187:drug effects; D016222:Fibroblast Growth Factor 2 / Q000494:pharmacology; D006801:Humans; D051379:Mice; D009474:Neurons / Q000166:cytology* / Q000187:drug effects; D010641:Phenotype
chemical_list: D016222:Fibroblast Growth Factor 2