Axoplasmic Transport in Physiology and Pathology by Dieter G. Weiss (auth.), Dr. Dieter G. Weiss, Dr. Alfredo

By Dieter G. Weiss (auth.), Dr. Dieter G. Weiss, Dr. Alfredo Gorio (eds.)

Cajal and modern scientists have laid the root of the modem recommendations of the association of the apprehensive method: the cir­ cuits of the mind are made of person neurons which move details through really expert constructions referred to as synapses. Soma and den­ drites frequently obtain the inputs, then the sign is carried all alongside the axon to the objective parts. to satisfy this activity various kinds of neurons have built their distinctive geometry characterised through a wide recep­ tive region (soma and dendrites) and a frequently very huge distal branching with the axon terminals. the amount of cytoplasm which constitutes the neuronal outer edge is frequently some distance higher than the phone physique, the place the substitute equipment is found. it truly is one of many roles ofaxoplasmic delivery to provide the outer edge with right fabric and to maintain the really expert buildings important for the physiological job of the neuron. additionally, it has develop into increasingly more transparent that focus on parts additionally exert results at the innervating neurons, and those results aren't in basic terms mediated through recurrent fibers. Synapses were proven so that it will choose up fabric from the synaptic left that's then intra­ axon best friend transported again to the mobilephone physique. This retrograde axoplasmic shipping has as a result been famous as one other easy mechanism to express indications from the outer edge to the centre.

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Brain Res 121:353-357 27. Sattin A, Rail TW (1970) Cyclic AMP content of guinea pig cerebral cortex slices. Mol PharmacoI6:13-23 28. Schubert P, Komp W, Kreutzberg GW (1979) Correlation of 5 '-nucleotidase activity and selective transneuronal transfer of adenosine in the hippocampus. Brain Res 168 :419-424 29. Schubert P, Kreutzberg GW (1974) Axonal transport of adenosine and uridine derivatives and transfer to postsynaptic neurons. Brain Res 76:526-530 30. Schubert P, Kreutzberg GW (1975) Parameters of dendritic transport.

Magnified XIS. Darkfield autoradiography Fig. 3. Transfer of 3H-adenosine derivatives from septal fibers to single neurons in the dentate gyrus (arrows) probably repre senting hippocampal interneurons. Note the non-selective tran sfer also to perineuronal glial cells. Magnified X 600 . (26) 36 P. W. Kreutzberg For more detailed studies on the parameters of this transneuronal transfer of adenine compounds we used the afferent projection to the hippocampus which originates in the entorhinal cortex and terminates in well defined layers on the dendrites of hippocampal granule cells.

Kreutzberg GW, T6th L, Kaiya H (1975) Acetylcholinesterase as a marker for dendritic transport and dendritic secretion. Adv NeuroI12:269-281 18. Lee KS, Schubert P (1982) Modulation of an inhibitory circuit by adenosine and AMP in the hippocampus. Brain Res (in press) 19. Lee KS, Schubert P, GribkoffV, Brimmer S, Lynch G (1982) A combined in vivo/in vitro study of the presynaptic release of adenosine derivatives in the hippocampus. J Neurochem 38:80-83 20. Lux HD, Schubert P, Kreutzberg GW, Globus A (1970) Excitation and axonal flow.

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