A novel cell migratory zone in the developing hippocampal formation.
The hippocampal formation (HF) is a unique structure in the mammalian brain and is subdivided into the dentate gyrus, Ammon's horn, and subiculum by their functions and connectivity in the neuronal circuit. Because behaviors of the neural stem cells, neuronal progenitors, and the differentiating neurons are complex during hippocampal morphogenesis, the differentiation of these subdivisions has not been well understood. In this study, we investigated embryonic and postnatal expression of the proteins Prox1, Math2, and Ctip2, which clearly indicate principal cells of the dentate gyrus (Prox1 positive) and Ammon's horn (Math2 and Ctip2 positive). Expression patterns of Prox1 and Math2 were consistent with previously suggested localization of migratory pathways of the dentate granule cells and hippocampal pyramidal cells. Interestingly, we found intermingling of Prox1-expressing cells and Math2-expressing cells in a cell migratory stream, suggesting previously unknown behaviors of differentiating cells of the HF.
Department of Developmental Neuroscience, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.
Taku
T
Sugiyama
Noriko
N
Osumi
Yu
Y
Katsuyama
D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins / Q000378:metabolism; D002465:Cell Movement / Q000502:physiology*; D006624:Hippocampus / Q000033:anatomy & histology* / Q000254:growth & development* / Q000502:physiology; D018398:Homeodomain Proteins / Q000378:metabolism; D007150:Immunohistochemistry; D008810:Mice, Inbred C57BL; D009419:Nerve Tissue Proteins / Q000378:metabolism; D058953:Neural Stem Cells / Q000166:cytology / Q000502:physiology; D055495:Neurogenesis / Q000502:physiology; D017966:Pyramidal Cells / Q000166:cytology / Q000254:growth & development / Q000502:physiology; D012097:Repressor Proteins / Q000378:metabolism; D025521:Tumor Suppressor Proteins / Q000378:metabolism; D000098551:Prospero-Related Homeobox 1 Protein
D051792:Basic Helix-Loop-Helix Proteins; D018398:Homeodomain Proteins; D009419:Nerve Tissue Proteins; D012097:Repressor Proteins; D025521:Tumor Suppressor Proteins; D000098551:Prospero-Related Homeobox 1 Protein; C511143:Bcl11b protein, mouse; C110701:Neurod6 protein, mouse
Math2; Prox1; cell migration; dentate granule cell progenitor; differentiation; hippocampal pyramidal cell