Document Detail

Comparative analysis of the subventricular zone in rat, ferret and macaque: evidence for an outer subventricular zone in rodents.
MedLine Citation:
PMID:  22272298     Owner:  NLM     Status:  MEDLINE    
The mammalian cerebral cortex arises from precursor cells that reside in a proliferative region surrounding the lateral ventricles of the developing brain. Recent work has shown that precursor cells in the subventricular zone (SVZ) provide a major contribution to prenatal cortical neurogenesis, and that the SVZ is significantly thicker in gyrencephalic mammals such as primates than it is in lissencephalic mammals including rodents. Identifying characteristics that are shared by or that distinguish cortical precursor cells across mammalian species will shed light on factors that regulate cortical neurogenesis and may point toward mechanisms that underlie the evolutionary expansion of the neocortex in gyrencephalic mammals. We immunostained sections of the developing cerebral cortex from lissencephalic rats, and from gyrencephalic ferrets and macaques to compare the distribution of precursor cell types in each species. We also performed time-lapse imaging of precursor cells in the developing rat neocortex. We show that the distribution of Pax6+ and Tbr2+ precursor cells is similar in lissencephalic rat and gyrencephalic ferret, and different in the gyrencephalic cortex of macaque. We show that mitotic Pax6+ translocating radial glial cells (tRG) are present in the cerebral cortex of each species during and after neurogenesis, demonstrating that the function of Pax6+ tRG cells is not restricted to neurogenesis. Furthermore, we show that Olig2 expression distinguishes two distinct subtypes of Pax6+ tRG cells. Finally we present a novel method for discriminating the inner and outer SVZ across mammalian species and show that the key cytoarchitectural features and cell types that define the outer SVZ in developing primates are present in the developing rat neocortex. Our data demonstrate that the developing rat cerebral cortex possesses an outer subventricular zone during late stages of cortical neurogenesis and that the developing rodent cortex shares important features with that of primates.
Verónica Martínez-Cerdeño; Christopher L Cunningham; Jasmin Camacho; Jared L Antczak; Anish N Prakash; Matthew E Cziep; Anita I Walker; Stephen C Noctor
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-01-17
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2012-01-24     Completed Date:  2012-06-11     Revised Date:  2014-03-20    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e30178     Citation Subset:  IM    
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MeSH Terms
Anatomy, Comparative
Cell Count
Cerebral Cortex / cytology*,  embryology,  metabolism
Embryo, Mammalian / cytology,  embryology,  metabolism
Eye Proteins / metabolism
Homeodomain Proteins / metabolism
Macaca mulatta
Neocortex / cytology,  embryology,  metabolism
Neural Stem Cells / cytology*,  metabolism
Neurons / cytology*,  metabolism
Paired Box Transcription Factors / metabolism
Rats, Sprague-Dawley
Repressor Proteins / metabolism
Somatosensory Cortex / cytology,  embryology,  metabolism
T-Box Domain Proteins / metabolism
Time Factors
Grant Support
Reg. No./Substance:
0/Eye Proteins; 0/Homeodomain Proteins; 0/PAX6 protein; 0/Paired Box Transcription Factors; 0/Repressor Proteins; 0/T-Box Domain Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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