Download Acetylthiocholinesterase Distribution in the Brain Stem of by E. Ramon-Moliner PDF

By E. Ramon-Moliner

ISBN-10: 3540060367

ISBN-13: 9783540060369

The earliest reports at the local distribution of acetylcholinesterase (AChE) in the principal worried process have been in keeping with the decision of the volume of CO liberated by way of homogenates of chosen components within the presence of an ester of two choline and a bicarbonate buffer. utilizing this biochemical method, Burgen and Chipman (1951) have been capable of identify that acetylcholinesterase isn't calmly allotted in the relevant apprehensive process. they discovered that the cerebellum, the lateral geniculate physique, and the striatum contained a excessive focus of soreness. The excessive focus of soreness within the striatum should be correlated with the next cost of acetylcholine synthesis. despite the fact that, this used to be no longer the case for the cerebellum, the place acetylcholine synthesis was once very low. different in vitro reports were geared toward setting up the nearby distribution of the opposite parts of the cholinergic method, cholinacetylase (ChA) and acetylcholine (ACh). An both asymetrical distribution for those components has been verified in vitro (MacIntosh, 1941; Feldberg and Mann, 1946; Feldberg and V ogt, 1948; MacIntosh and Oborin, 1953; Quastel, 1962; Mitchell, 1963; Krnjevic and Phillis, 1963; Aprison et al., 1964; McLennan, 1964; Cohen, 1956). The in vitro selection of acetylcholinesterase (Koelle, 1950; Burgen and Chipman, 1951; Giacobini, 1959; Bennett et al., 1966; Fahn and Cote, 1968; Miller et al., 1969) provides the advan tage of allowing using a substrate like ACh that's a commonly taking place ester of choline in order that the institution of enzyme specificity is much less questionable.

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The brain stem of the cat. A cytoarchitectonic atlas with stereotaxic coordinates. Madison, Wisconsin: University of Wisconsin Press 1968. : Cholinesterase in human and ruminant nervous tissue. Proc. Soc. expo Bio!. (N. ) 95,672-674 (1957). Bloom, F. , Barrnett, R. : The fine structural localization of cholinesterases in nervous tissue. Ann. N. Y. Acad. Sci. 144, 613-625 (1967). Bonichon, A. : Acetylcholinesterase dans la cellule et la fibre nerveuse au cours du developpement. Bib!. anat. (Basel) 2,62-72 (1961).

Acetylcholine synthesis in different regions of the central nervous system. J. Physiol. ) 107,372-381 (1948). Foldes, F. , Zsigmond, E. , Foldes, V. , Erdos, E. : The distribution of acetylcholinesterase in the human brain. J. Neurochem. 9, 559-572 (1962). Friede, R. : A histochemical atlas of tissue Oxidation in the brain stem of the cat. Basel and New York: Karger 1961. Friede, R. : Topographic brain chemistry. New York: Academic Press 1966. Friede, R. : A comparative histochemical mapping of the distribution of butyryl cholinesterase in the brain of four species of mammals, including man.

But these areas are seen blending with each other, as one could have expected by taking into account the considerable degree of overlapping of their dendritic fields. For this reason, we feel that the term "tegmentum" remains useful. It can still be subdivided into several regions which, in turn, can be coined on topographical grounds. But, on the other hand, it still conveys the idea of a continuum within which other better outlined centers of "nuclei" are embedded. The fact that the various regions of the brain stem are so differently stained in AThChE material is not easy to correlate with any known functional or physiological differences.

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