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J Integr Neurosci ; 8(4): 433-40, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-20205296

RESUMO

In order to explore neuroglial relationships in a simple nervous system, the ultrastructure of crayfish stretch receptor, which consists of only two sensory neurons enveloped by satellite glial cells, was studied. Neuronal Golgi complex was oriented such that its output trans-Golgi network usually faced the bundles of microtubules within the neuronal cytoplasm and very rarely to the outer membrane. Therefore, it participates mainly in the processing of proteins transported along microtubules to distal neuron parts rather than those transported to glial cells. Structural triads of submembrane cisterns-vesicles-mitochondria were involved in formation of glial protrusions into the neuronal cytoplasm. The double-wall vesicles within the neuron body were the captured parts of such glial protrusions. Glial protrusions and double-wall vesicles facilitated the neuroglial transport and large-scale delivery of the glial material into the neuron. The neuroglial transport could also be performed by diffusion across the intercellular space. These data indicate the significant neuroglial exchange with cellular components.


Assuntos
Astacoidea/fisiologia , Fusos Musculares/fisiologia , Músculo Estriado/fisiologia , Neuroglia/metabolismo , Células Satélites Perineuronais/metabolismo , Células Receptoras Sensoriais/metabolismo , Animais , Astacoidea/ultraestrutura , Comunicação Celular/fisiologia , Citoplasma/metabolismo , Citoplasma/ultraestrutura , Eletrofisiologia , Retículo Endoplasmático/metabolismo , Retículo Endoplasmático/ultraestrutura , Complexo de Golgi/metabolismo , Complexo de Golgi/ultraestrutura , Membranas Intracelulares/metabolismo , Membranas Intracelulares/ultraestrutura , Microscopia Eletrônica de Transmissão , Microtúbulos/metabolismo , Microtúbulos/ultraestrutura , Fusos Musculares/ultraestrutura , Músculo Estriado/ultraestrutura , Neuroglia/ultraestrutura , Organelas/metabolismo , Organelas/ultraestrutura , Transporte Proteico/fisiologia , Células Satélites Perineuronais/ultraestrutura , Células Receptoras Sensoriais/ultraestrutura , Vesículas Transportadoras/metabolismo , Vesículas Transportadoras/ultraestrutura
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