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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.46 no.1 São Paulo Mar. 1988 

A freeze-fracture study on the developing satellite cells of spinal ganglia in the chick embryo


Estudo com a técnica da crio-fratura das células satélites dos gânglios sensitivos do embrião de galinha



Claudio A. Ferraz de CarvalhoI; Ciro F. da SilvaII

IFull Professor - Department of Anatomy, Institute of Biomedical Science, University of São Paulo
IIAssistant Professor - Department of Anatomy, Institute of Biomedical Science, University of São Paulo




A freeze-fracture analysis of the satellite cells of spinal ganglia of the chick embryo was performed in 8 successive stages of development, from the 5th incubation day to hatching. The characteristic laminar disposition of the cells were first observed on the 7th day. Tight junctions were found at the 20th incubation day. Small groups or irregular aggregates of particles, but not gap junctions, were described on the 7th and 8th days. Pinocytotic vesicles were pointed out in the different stages considered.


Foi feita análise pelo método da crio-fratura de células satélites em 8 diferentes fases do desenvolvimento do embrião de galinha, do quinto dia à eclosão. A disposição laminar característica das células foi observada inicialmente no sétimo dia. Foram encontradas junções do tipo «tight» no 20º dia de incubação. Pequenos grupos ou agregados de partículas foram descritos no sétimo e oitavo dias, mas não típicas junções «gap». Vesículas de pinocitose foram apontadas nos diferentes estágios considerados.



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This work was performed in the Department of Anatomy, Institute of Biomedical Science, University of São Paulo and supported by a grant from FAPESP (PB-86/3336-0) to C.A.F.C.
We thank Prof. Antonio Sesso for the preparation of the freeze-fracture replicas
Departamento de Anatomia, Instituto de Ciências Biomédicas, Universidade de São Paulo - Caixa Postal 4365 - 01051 - São Paulo, SP - Brasil.

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