Unknown

Dataset Information

0

Structural development and dorsoventral maturation of the medial entorhinal cortex.


ABSTRACT: We investigated the structural development of superficial-layers of medial entorhinal cortex and parasubiculum in rats. The grid-layout and cholinergic-innervation of calbindin-positive pyramidal-cells in layer-2 emerged around birth while reelin-positive stellate-cells were scattered throughout development. Layer-3 and parasubiculum neurons had a transient calbindin-expression, which declined with age. Early postnatally, layer-2 pyramidal but not stellate-cells co-localized with doublecortin - a marker of immature neurons - suggesting delayed functional-maturation of pyramidal-cells. Three observations indicated a dorsal-to-ventral maturation of entorhinal cortex and parasubiculum: (i) calbindin-expression in layer-3 neurons decreased progressively from dorsal-to-ventral, (ii) doublecortin in layer-2 calbindin-positive-patches disappeared dorsally before ventrally, and (iii) wolframin-expression emerged earlier in dorsal than ventral parasubiculum. The early appearance of calbindin-pyramidal-grid-organization in layer-2 suggests that this pattern is instructed by genetic information rather than experience. Superficial-layer-microcircuits mature earlier in dorsal entorhinal cortex, where small spatial-scales are represented. Maturation of ventral-entorhinal-microcircuits - representing larger spatial-scales - follows later around the onset of exploratory behavior.

SUBMITTER: Ray S 

PROVIDER: S-EPMC4876644 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4304787 | biostudies-literature
2017-08-01 | GSE85753 | GEO
| S-EPMC4976037 | biostudies-literature
| S-EPMC10781645 | biostudies-literature
| S-EPMC7186407 | biostudies-literature
| S-EPMC5385340 | biostudies-literature
| S-EPMC5465388 | biostudies-literature
| S-EPMC9393258 | biostudies-literature
| S-EPMC11300029 | biostudies-literature
| S-EPMC4261098 | biostudies-literature