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5 results on '"Tokunaga, A."'

3. A 15-YEAR SPATIOTEMPORAL ANALYSIS OF MYCOBACTERIUM TUBERCULOSIS LINEAGES 1 AND 2 IN CHIANG RAI, THAILAND

Author

A. Disratthakit, P. Palittapongarnpim, P. Ajawatanawong, N. Smittipat, S. Mahasirimongkol, R. Miyahara, H. Yanai, N. Yamada, S. Nedsuwan, W. Imasanguan, P. Kantipong, B. Chaiyasirinroje, S. Bupachat, P. Ananpradit, W. Ruengchai, T. Juthayothin, J. Phelan, J. Parkhill, T. G. Clark, M. L. Hibberd, and K. Tokunaga

Subjects
Infectious and parasitic diseases, RC109-216
Published
2018
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5. [Freeze fracture study of vesicle attachment sites during mediator liberation in spinal motoneuron synapses].

Author

Akert K and Tokunaga A

Subjects
Aminopyridines pharmacology, Animals, Freeze Fracturing, Microscopy, Electron, Motor Neurons drug effects, Motor Neurons metabolism, Neurotransmitter Agents metabolism, Rats, Synaptic Membranes ultrastructure, Synaptic Vesicles ultrastructure, Motor Neurons ultrastructure, Spinal Cord cytology
Abstract

Freeze-fractured appearances of vesicle attachement sites (VAS) in presynaptic active zone were studied in the spinal cord of 4-aminopyridine (4-AP) treated and nembutalized rats. The VAS were classified into: type 1 containing no intramembranous particles, type 2 with particles around the edge of openings, type 3 containing several particles within the VAS. The application of 4-AP, which is known to enhance transmitter release, affected strikingly the total number of VAS (p less than 0.001) but not the proportion of the three types. The predominance of type 3 outside the active zone and its similarity to particle-loaded indentations possibly corresponding to coated vesicle formation, suggested that type 3 may represent endocytosis. It is likely that the remaining two types represent exocytosis.

Published
1979

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