Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.1.1.7 (acetylcholinesterase)
 28,390 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

All birds have a glial enclosed, glycogen-containing structure in the lumbosacral region of their spinal cords. Recently, a dorsal, central, glycogen-rich area surrounding the central canal in the brachial spinal cord was described in domestic chickens. In order to topographically delineate and histochemically describe this structure, fresh, frozen serial sections of chicken brains and spinal cords were processed for glycogen content, phosphorylase, succinic dehydrogenase and cholinesterase activities. The glycogen-rich area surrounding the central canal in the lumbosacral region is found at all levels of the spinal cord and lower medulla. In the upper medulla, it is located in the medline floor immediately ventral to the ependyma. It persists in this position until the level of the oculomotor complex where it ends. Phosphorylase positive regions closely parallel the glycogen distribution. No succinic dehydrogenase or cholinesterase activities are found in these areas.
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PMID:The craniocaudal extent of the glycogen body in the domestic chicken. 89 22

The literature data for normal glia enzyme activity are reviewed, with special reference to the specific phosphatases and the nucleoside-phosphatases and their relationship to transport mechanisms and the Golgi apparatus. Their demonstration still presents technical difficulties and is also hindered by substrate affinity variations which influence the histochemical picture; greater activity is sometimes observed in the oligodendrocytes and sometimes in the astrocytes and, in the latter, in different cytoplasma or nucleus structures. Using 32ATP, Hyden has shown the importance of this enzyme as a regulator of neuron K availability and of substrate transport from the capillaries to the nerve cells. Several workers have shown the striking positivity of the ATPase reaction in animal glia, as well as its importance in the sodium pump mechanism. Carboanhydrase is also involved in transport mechanisms. Giacobini has demonstrated high cholinesterase values and an absence of AChE in oligodendrocytes and astrocytes. Lysosome has been proved to be an arylsulphatase site. Phosphorylase is important in glial cell metabolism, since high levels indicate increased glycogen metabolism.
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PMID:[Histochemical demonstration of glial enzyme activity. I. Normal glia]. 1734 Aug 7