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Interactions of multilamellar phospholipid vesicles with bovine lymphocytes: Effects of α-tocopherol on lymphocyte blastogenesis

Molecular Immunology, ISSN: 0161-5890, Vol: 19, Issue: 11, Page: 1491-1498
1982
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  • Citations
    9
    • Citation Indexes
      9

Article Description

Multilamellar lipid vesicles (MLV) composed of egg yolk lecithin (EYL) suppressed the response of bovine peripheral blood lymphocytes (BPBL) to phytohemagglutinin (PHA). EYL contains 18:1 and 18:2 as the major unsaturated phospholipids. Dioleoyllecithin (DOL; cis 9) MLV did not suppress BPBL blastogencsis. Dilinoeyllecithin (DLL: cis. cis 9. 12) MLV suppressed BPBL blastogenesis. The suppressive effect could be reversed by increasing the MLV DML concentration. The addition of α-tocopherol (α-T) at 10 mole% into MLV containing DLL reversed blastogenic suppression of BPBL. MLV composed of mixed saturated phospholipids (dimyristoyllecithin and dipalmitoyllecithin) and α-T enhanced the BPBL blastogenic response to PHA. BPBL incubated with varying PHA concentrations (11.82–375 mg/ml) and a constant concentration (2 μmoles/ml) of MLV composed of EYL remained suppressed either when PHA and MLV were added simultaneously or when MLV were incubated for 1 hr prior to the addition of PHA. This suggests that a-T may act as an immunomodulator in the blastogenic response to PHA. Results suggest that α-T reversion of EYL suppression of BPBL blastogenesis may be due to interactions of α-T with unsaturated acyl chains in EYL phospholipids.

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