Vascular endothelial growth factor (VEGF) stimulates neurogenesis in vitro and in vivo.
Vascular endothelial growth factor (VEGF) is an angiogenic protein with neurotrophic and neuroprotective effects. Because VEGF promotes the proliferation of vascular endothelial cells, we examined the possibility that it also stimulates the proliferation of neuronal precursors in murine cerebral cortical cultures and in adult rat brain in vivo. VEGF (>10 ng/ml) stimulated 5-bromo-2'-deoxyuridine (BrdUrd) incorporation into cells that expressed immature neuronal marker proteins and increased cell number in cultures by 20-30%. Cultured cells labeled by BrdUrd expressed VEGFR2/Flk-1, but not VEGFR1/Flt-1 receptors, and the effect of VEGF was blocked by the VEGFR2/Flk-1 receptor tyrosine kinase inhibitor SU1498. Intracerebroventricular administration of VEGF into rat brain increased BrdUrd labeling of cells in the subventricular zone (SVZ) and the subgranular zone (SGZ) of the hippocampal dentate gyrus (DG), where VEGFR2/Flk-1 was colocalized with the immature neuronal marker, doublecortin (Dcx). The increase in BrdUrd labeling after the administration of VEGF was caused by an increase in cell proliferation, rather than a decrease in cell death, because VEGF did not reduce caspase-3 cleavage in SVZ or SGZ. Cells labeled with BrdUrd after VEGF treatment in vivo include immature and mature neurons, astroglia, and endothelial cells. These findings implicate the angiogenesis factor VEGF in neurogenesis as well.
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA 94945, USA.
Kunlin
K
Jin
Yonghua
Y
Zhu
Yunjuan
Y
Sun
Xiao Ou
XO
Mao
Lin
L
Xie
David A
DA
Greenberg
D000818:Animals; D001921:Brain / Q000166:cytology / Q000187:drug effects; D053148:Caspase 3; D020169:Caspases / Q000378:metabolism; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D000089662:Doublecortin Protein; D016228:Endothelial Growth Factors / Q000494:pharmacology*; D007150:Immunohistochemistry; D066298:In Vitro Techniques; D008222:Lymphokines / Q000494:pharmacology*; D051379:Mice; D009474:Neurons / Q000166:cytology / Q000187:drug effects; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
C000714847:Dcx protein, mouse; C000714848:Dcx protein, rat; D000089662:Doublecortin Protein; D016228:Endothelial Growth Factors; D008222:Lymphokines; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors; C505409:Casp3 protein, mouse; C505410:Casp3 protein, rat; D053148:Caspase 3; D020169:Caspases