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On the effect of brain phospholipase A1on specifically labelled glycerophospholipids in the course of subacute sclerosing panencephalitis

✍ Scribed by Ulrike Jakumeit-Morgott; Helmut Woelk

Publisher
Springer
Year
1975
Tongue
English
Weight
498 KB
Volume
209
Category
Article
ISSN
0340-5354

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✦ Synopsis

The effect of phospholipase A1 of human brain on 1,2-diacyl-sn-glycero-3-phosphorylcholine, -ethanolamine and -serine, specifically labelled with different fatty acids at either the 1 or 2 position, was determined in subacute sclerosing panencephalitis. An increase of approximately 40% in the specific activity of phospholipase A1 could be observed for all substrates investigated during the demyelinating disorder. On investigating the specific activity of the enzyme with various molecular species of phosphatidylcholine and -ethanolamine, labelled at the 1 position with different radioactive fatty acids, we found that the phospholipase A1 preferentially removed those fatty acids from the 1 position of phosphatidylcholines that have the fewest double bonds, while oleic and linoleic acid were released at almost similar rates from phosphatidylethanolamine.

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