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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
10
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pubmed:dateCreated |
1993-12-10
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pubmed:abstractText |
To precisely determine the biologic role of fish oil-derived constituents (n-3 polyunsaturated fatty acids), it is imperative that information on highly purified n-3 polyunsaturated fatty acids be evolved. Therefore, we studied the effects of a low dose, short term dietary supplementation with highly purified (n-3) ethyl esters with regard to murine T lymphocyte function. A 10-day dietary supplementation with low dose, highly purified (n-3) fatty acid ethyl esters was examined for effects on murine splenic lymphocyte function and membrane composition. Mice were fed diets containing either 3% safflower oil (SAF) ethyl esters, 2% SAF plus 1% eicosapentaenoic acid ethyl esters (EPA) (99% pure), or 2% SAF plus 1% docosahexaenoic acid ethyl esters (DHA) (97% pure). Fatty acid analysis of the lymphocyte membranes showed that membrane compositions of the EPA- and DHA-fed mice were subsequently enriched with these (n-3) fatty acids. Con A-induced lymphoproliferative assays (Con A, 5 and 10 micrograms/ml) revealed that splenic lymphocytes from the EPA group had significantly higher mitogenic responses relative to lymphocytes from the DHA or SAF groups (p < 0.05). In contrast, DHA splenocytes had the highest level of 3H-labeled diradylglycerol as a percentage of total lipid. Macrophage-lymphocyte co-cultures demonstrated that the dietary effect on proliferation in response to Con A was influenced by lymphocyte source, but apparently not by macrophage source. In addition, cells from Mycobacterium bovis vaccine-vaccinated mice were placed in culture with purified protein derivative (PPD) (10, 20, and 40 micrograms/ml), as well as Con A (5 and 10 micrograms/ml) to allow comparison between mitogenic and antigenic stimulation. No statistically significant differences (p > 0.05) existed between the diet groups upon PPD stimulation. However, lymphocytes from the DHA group exhibited significantly higher proliferative responses to Con A than cells from the EPA and SAF groups (p < 0.05). M. bovis vaccine-immunized EPA and DHA fed mice also exhibited significantly reduced delayed-type hypersensitive reactivity to footpad testing with PPD in comparison to that demonstrated by SAF-fed mice (p < 0.05). EPA-fed mice demonstrated the most decreased response. Overall, this study demonstrates for the first time that: 1) low dose, short term dietary supplementation with highly purified EPA or DHA can modulate select functional and transmembrane signaling responses of murine splenic lymphocytes; and 2) that these dietary agents have differing effects on mitogen vs Ag receptors.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
AIM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/4,7,10,13,16,19-docosahexaenoic...,
http://linkedlifedata.com/resource/pubmed/chemical/Anti-Inflammatory Agents,
http://linkedlifedata.com/resource/pubmed/chemical/Diglycerides,
http://linkedlifedata.com/resource/pubmed/chemical/Docosahexaenoic Acids,
http://linkedlifedata.com/resource/pubmed/chemical/Eicosapentaenoic Acid,
http://linkedlifedata.com/resource/pubmed/chemical/Interleukin-1,
http://linkedlifedata.com/resource/pubmed/chemical/eicosapentaenoic acid ethyl ester
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pubmed:status |
MEDLINE
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pubmed:month |
Nov
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pubmed:issn |
0022-1767
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
151
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
5186-97
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:8228217-Animals,
pubmed-meshheading:8228217-Anti-Inflammatory Agents,
pubmed-meshheading:8228217-Cells, Cultured,
pubmed-meshheading:8228217-Diet,
pubmed-meshheading:8228217-Diglycerides,
pubmed-meshheading:8228217-Docosahexaenoic Acids,
pubmed-meshheading:8228217-Eicosapentaenoic Acid,
pubmed-meshheading:8228217-Female,
pubmed-meshheading:8228217-Interleukin-1,
pubmed-meshheading:8228217-Lipid Metabolism,
pubmed-meshheading:8228217-Lymphocyte Activation,
pubmed-meshheading:8228217-Mice,
pubmed-meshheading:8228217-Mice, Inbred C57BL,
pubmed-meshheading:8228217-T-Lymphocytes
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pubmed:year |
1993
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pubmed:articleTitle |
Effects of purified dietary n-3 ethyl esters on murine T lymphocyte function.
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pubmed:affiliation |
Department of Animal Science, Texas A&M University, College Station 77843-2471.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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