Lysophosphatidylcholine from white muscle of bonito Euthynnus pelamis (Linnaeus): Involvement of phospholipase A1 activity for its production

Satouchi, Kiyoshi; Sakaguchi, M; Shirakawa, Márcia Aiko; Hirano, Katsuhiko; Tanaka, Tamotsu

doi:10.1016/0005-2760(94)90077-9

Cited by 18 publications

References 17 publications

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Effects of growth temperature on the fatty acid composition of the free‐living nematodeCaenorhabditis elegans

Tanaka

Ikita

Ashida

et al. 1996

Lipids

110

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The effects of growth temperature on the fatty acid compositions of the phosphatidylcholine (PC), phosphatidylethanolamine (PE), and total lipid (TL) fractions of the free-living nematode Caenorhabditis elegans were investigated. A reduction in growth temperature from 25 to 15 degrees C caused the proportions of eicosapentaenoic acid (20:5n-3) to increase from 23.6 to 32.5% in the PC, from 7.4 to 10.8% in the PE, and from 12.9 to 19.9% in the TL fractions. Conversely, the levels of dihomo-gamma-linolenic acid (20:3n-6) and arachidonic acid (20:4n-6) in these phospholipid fractions and the TL fraction both decreased with decreasing growth temperature. Analysis of the positional distribution of fatty acids in the PC fraction revealed that the change in the composition of C20 polyunsaturated fatty acid was obvious in position sn-2. Lowering the growth temperature induced an increase in the level of the diacyl subclass of PE from 58% at 25 degrees C to 71% at 15 degrees C, with a concomitant decrease in the levels of the alkylacyl and alkenylacyl subclass of PE of C. elegans. These changes observed in the phospholipids of C. elegans might be one mechanism for adaptation to low temperature.

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Effects of growth temperature on the fatty acid composition of the free‐living nematodeCaenorhabditis elegans

Tanaka

Ikita

Ashida

et al. 1996

Lipids

110

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Oral Administration of 2-Docosahexaenoyl Lysophosphatidylcholine Displayed Anti-Inflammatory Effects on Zymosan A-Induced Peritonitis

2010

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Lysophosphatidylcholines (lysoPCs) have been known to be bioactive lipid mediators, which take part in various biological and pathological processes. In the present study, we examined the anti-inflammatory actions of 2-docosahexaenoyl lysophosphatidylcholine (2-docosahexaenoyl-lysoPC) in vitro as well as in vivo systems. When RAW 264.7 cells were treated with 2-docoshexaenoyl-lysoPC, a concentration-dependent decrease of LPS-induced formation of nitric oxide (NO), tumor necrosis factor alpha (TNF-α), or IL-6 was observed. Additionally, oral administration of 2-docosahexaenoyl-lysoPC was found to inhibit zymosan A-induced plasma leakage dose-dependently in mice with ED(50) value of 50 μg/kg and E (max) value of about 65%. Moreover, mechanistic study revealed that the anti-inflammatory action of 2-docosahexaenoyl-lysoPC seemed to be related largely to LTC(4) inhibition, but not PGE(2) inhibition. Moreover, 2-(17-hydroperoxydocosahexaneoyl)-lysoPC, intravenously administrated, was more effective than 2-docosahexaenoyl-lysoPC in the inhibition of zymosan A-induced plasma leakage, suggesting that 2-(17-hydroperoxydocosahexaneoyl)-lysoPC, a product from oxygenation of 2-docosahexaenoyl-lysoPC by 15-lipoxygenase (LOX), may be an active metabolite, intimately responsible for anti-inflammatory actions, generated from 2-docosahexaenoyl-lysoPC. In a related study, 2-docosahexaenoyl-lysoPC was found to be more efficient than 1-docosahexaenoyl-lysoPC or docosahexaenoic acid (DHA) as substrate for 15-lipoxygenases such as soybean LOX-1, leukocyte 12/15-LOX, and human 15-LOX-2. Taken altogether, it is suggested that 2-docosahexaenoyl-lysoPC and its oxygenation products may exert anti-inflammatory action after oral administration.

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Cytosolic lysophosphatidylcholine/transacylase in the production of dipolyunsaturated phosphatidylcholine in bonito muscle

et al. 1998

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Phosphatidylcholine with docosahexaenoic acid at both sn-1 and sn-2 positions occurs in relatively high abundance in bonito muscle. To explore a possible route for the dipolyunsaturated molecular species, phosphatidylcholine formation from 2-[1-IR C]linoleoyl lysophosphatidylcholine was examined using a cytosolic fraction from bonito muscle. The formation of radiolabeled phosphatidylcholine was greatest at 15³C and did not require the presence of cofactors such as CoA and calcium. By DEAE-cellulofine column chromatography, the activity to form phosphatidylcholine was separated from that of phospholipase A I , and the specific activity increased by about 100-fold. The possible involvement of cytosolic lysophosphatidylcholine/ transacylase in synthesis of dipolyunsaturated phosphatidylcholine is discussed.z 1998 Federation of European Biochemical Societies.

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Lysophosphatidylcholine from white muscle of bonito Euthynnus pelamis (Linnaeus): Involvement of phospholipase A1 activity for its production

Cited by 18 publications

References 17 publications

Effects of growth temperature on the fatty acid composition of the free‐living nematodeCaenorhabditis elegans

Effects of growth temperature on the fatty acid composition of the free‐living nematodeCaenorhabditis elegans

Oral Administration of 2-Docosahexaenoyl Lysophosphatidylcholine Displayed Anti-Inflammatory Effects on Zymosan A-Induced Peritonitis

Cytosolic lysophosphatidylcholine/transacylase in the production of dipolyunsaturated phosphatidylcholine in bonito muscle

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