Document Detail

Neurogenic development of the auditory areas of the midbrain and diencephalon in the Xenopus laevis and evolutionary implications.
MedLine Citation:
PMID:  18346715     Owner:  NLM     Status:  MEDLINE    
To study whether the core-versus-shell pattern of neurogenesis occurred in the mesencephalic and diencephalic auditory areas of amniotes also appears in the amphibian, [(3)H]-thymidine was injected into tadpoles at serial developmental stages of Xenopus laevis. Towards the end of metamorphism, [(3)H]-thymidine labeling was examined and led to two main observations: 1) neuron generation in the principal nucleus (Tp) started at stage 50, and peaked at stage 53, whereas it began at stage 48.5, and peaked around stage 49 in the other two mesencephalic auditory areas, the laminar nucleus (Tl) and the magnocellular nucleus (Tmc). 2) Neuron generation appeared at stage 40, and peaked around stage 52 in the posterior thalamic nucleus (P) and the central thalamic nucleus (C). Our study revealed that, like the cores of mesencephalic auditory nuclei in amniotes, Tp showed differences from Tl and Tmc in the onset and the peak of neurogenesis. However, such differences did not occur in the P and C. Our neurogenetic data were consistent with anatomical and physiological reports indicating a clear distinction between the mesencephalic, but not the diencephalic auditory areas of the amphibian. Our data are helpful to get insights into the organization of auditory nuclei and its evolution in vertebrates.
Shao Ju Zeng; CuiPing Tian; XinWen Zhang; Ming Xue Zuo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-02-20
Journal Detail:
Title:  Brain research     Volume:  1206     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  2008 Apr 
Date Detail:
Created Date:  2008-04-14     Completed Date:  2008-07-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  44-60     Citation Subset:  IM    
Key Laboratory for Cell Proliferation And Regulation Biology, Ministry of Education, Beijing Normal University, China.
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MeSH Terms
Antigens, Surface / metabolism
Auditory Cortex / cytology,  growth & development,  metabolism
Auditory Pathways / cytology,  growth & development*,  metabolism
Cell Differentiation
Diencephalon / cytology,  growth & development,  metabolism
Mesencephalon / cytology,  growth & development*,  metabolism
Metamorphosis, Biological / physiology
Neurons / cytology*,  metabolism
RNA-Binding Proteins / metabolism
Stem Cells / cytology,  metabolism
Thalamic Nuclei / cytology,  growth & development*,  metabolism
Xenopus laevis / growth & development*,  metabolism
Reg. No./Substance:
0/Antigens, Surface; 0/ELAV-like protein 1; 0/RNA-Binding Proteins

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