Leta i den här bloggen

lördag 27 augusti 2016

DHA aineenvaihdunnasta artikkeli (2016)

DHA Metabolism: Targeting the Brain and Lipoxygenation (PDF ...

https://www.researchgate.net/.../43346505_DHA_Metabolism_T... - Översätt den här sidan
17 maj 2016 - This paper reviews how it could accumulate through specific uptake of DHA-containing lysophosphatidylcholine (LysoPC-DHA). DHA migrates


Abstract
Docosahexaenoic acid (DHA), the end-product of the metabolism of omega-3 family fatty acids, is the main polyunsaturated fatty acid of the brain, but its accumulation is incompletely understood. This paper reviews how it could accumulate through specific uptake of DHA-containing lysophosphatidylcholine (LysoPC-DHA).

 Proposed metabolism for DHA with ultimate incorporation into brain phospholipids. DHA is weakly produced from linolenic acid (LNA) in the liver. LysoPC-DHA may be produced from PC-DHA hydrolysis by liver phospholipase A1 and released and/or by endothelial lipase from circulating PC-DHA. LysoPC-DHA may be taken up by the brain to be reacylated into PC and/or hydrolyzed to provide DHA to be esterified into phospholipids within the brain. Interconversion between brain phospholipids may also occur
 DHA migrates very easily from the sn-2 position of LysoPC, which could be considered as the physiological form of polyunsaturated LysoPC, to the sn-1 position, which is much more stable.
 An approach preventing migration by acetylating the sn-1 position, while retaining the main physico-chemical properties of the carrier, is described. 
Also, the double lipoxygenation and bond-isomerization of DHA into 10(S),17(S)-docosahexa-4Z,7Z,11E,13Z,15E,19Z-enoic acid, named PDX, by soybean lipoxygenase is described. As in other E,Z,E conjugated trienes, PDX is shown to inhibit human blood platelet aggregation at submicromolar concentrations.

Inga kommentarer:

Skicka en kommentar