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Titolo:
Development of commissural connections in the hippocampus of reeler mice: Evidence of an inhibitory influence of Cajal-Retzius cells
Autore:
Borrell, V; Ruiz, M; Del Rio, JA; Soriano, E;
Indirizzi:
Univ Barcelona, Dept Anim & Plant Cell Biol, Barcelona 08028, Spain Univ Barcelona Barcelona Spain 08028 t Cell Biol, Barcelona 08028, Spain
Titolo Testata:
EXPERIMENTAL NEUROLOGY
fascicolo: 2, volume: 156, anno: 1999,
pagine: 268 - 282
SICI:
0014-4886(199904)156:2<268:DOCCIT>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXTRACELLULAR-MATRIX PROTEINS; POSTNATAL MURINE HIPPOCAMPUS; AXON GUIDANCE; NEURITE OUTGROWTH; IN-VIVO; ORGANOTYPIC CULTURES; TARGET SELECTION; CEREBRAL-CORTEX; PIONEER NEURONS; NERVOUS-SYSTEM;
Keywords:
axonal guidance; reelin; extracellular; matrix proteins; Cajal-Retzius cells;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Soriano, E Univ Barcelona, Dept Anim & Plant Cell Biol, Diagonal 645, Barcelona 08028, Univ Barcelona Diagonal 645 Barcelona Spain 08028 elona 08028,
Citazione:
V. Borrell et al., "Development of commissural connections in the hippocampus of reeler mice: Evidence of an inhibitory influence of Cajal-Retzius cells", EXP NEUROL, 156(2), 1999, pp. 268-282

Abstract

Reelin is a large, extracellular matrix protein involved in neuronal migration and axonal growth. To analyze the contribution of Reelin to the development of the commissural projection in the hippocampus, we analyzed the ontogeny of this projection in the reeler mutant mouse. Injections of the lipophilic tracer DiI revealed many commissural fibers in the hippocampus of both reeler and control nice at P1-P2. At P5, at P12, and in the adult, the topography of commissural connections was normal in the CA1 region of reelermice, with axons innervating the stratum radiatum and stratum oriens. In contrast, in the CA3/CA2 region, commissural fibers abnormally innervated the stratum lacunosum-moleculare and, in the dentate gyrus, some fibers were observed in the outer molecular layer. Next, we monitored the distribution of Cajal-Retzius cells in the hippocampus of reeler mutant mice and noted that the stratum lacunosum-moleculare of the CA3/CA2 region was largely devoid of Cajal-Retzius (GR) cells. Taken together, the above results indicate that in the absence of CR cells in the CA3/CA2, commissural axons abnormally grow to the stratum lacunosum-moleculare. To test this hypothesis a series of coculture experiments was performed in collagen gels, in which the CA3axonal growth was monitored when confronted to the marginal zone. These experiments showed that the marginal zone containing GR cells exerts short-range inhibitory influences for conmissural axonal growth. (C) 1999 Academic Press.

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Documento generato il 09/04/20 alle ore 07:37:55