Selective expression of presenilin 1 in neural progenitor cells rescues the cerebral hemorrhages and cortical lamination defects in presenilin 1-null mutant mice.
Mice with a null mutation of the presenilin 1 gene (Psen1(-/-)) die during late intrauterine life or shortly after birth and exhibit multiple CNS and non-CNS abnormalities, including cerebral hemorrhages and altered cortical development. The cellular and molecular basis for the developmental effects of Psen1 remain incompletely understood. Psen1 is expressed in neural progenitors in developing brain, as well as in postmitotic neurons. We crossed transgenic mice with either neuron-specific or neural progenitor-specific expression of Psen1 onto the Psen1(-/-) background. We show that neither neuron-specific nor neural progenitor-specific expression of Psen1 can rescue the embryonic lethality of the Psen1(-/-) embryo. Indeed neuron-specific expression rescued none of the abnormalities in Psen1(-/-) mice. However, Psen1 expression in neural progenitors rescued the cortical lamination defects, as well as the cerebral hemorrhages, and restored a normal vascular pattern in Psen1(-/-) embryos. Collectively, these studies demonstrate that Psen1 expression in neural progenitor cells is crucial for cortical development and reveal a novel role for neuroectodermal expression of Psen1 in development of the brain vasculature.
Wen
Paul H
PH
Department of Psychiatry, Mount Sinai School of Medicine, New York, NY 10029, USA.
De Gasperi
Rita
R
Sosa
Miguel A Gama
MA
Rocher
Anne B
AB
Friedrich
Victor L
VL
Hof
Patrick R
PR
Elder
Gregory A
GA
D000818:Animals; D002465:Cell Movement; D002540:Cerebral Cortex / Q000196:embryology / Q000378:metabolism* / Q000473:pathology*; D002543:Cerebral Hemorrhage / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D020964:Embryo Loss; D004622:Embryo, Mammalian / Q000098:blood supply / Q000196:embryology / Q000378:metabolism / Q000473:pathology; D042783:Endothelial Cells / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D006801:Humans; D007381:Intermediate Filament Proteins / Q000235:genetics; D007438:Introns / Q000235:genetics; D008565:Membrane Proteins / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008822:Mice, Transgenic; D009419:Nerve Tissue Proteins / Q000235:genetics; D064231:Nestin; D009474:Neurons / Q000378:metabolism* / Q000473:pathology; D053764:Presenilin-1; D051381:Rats; D013234:Stem Cells / Q000378:metabolism* / Q000473:pathology; D013687:Telencephalon / Q000196:embryology / Q000378:metabolism / Q000473:pathology
D007381:Intermediate Filament Proteins; D008565:Membrane Proteins; C577484:NES protein, human; D009419:Nerve Tissue Proteins; C577485:Nes protein, mouse; C577486:Nes protein, rat; D064231:Nestin; C508853:PSEN1 protein, human; D053764:Presenilin-1