Abstract
We previously showed that dietary fish oil (FO) and energy restriction (R) have beneficial anti-inflammatory properties in the peripheral blood and spleens of (NZB x NZW)F1 (B/W) lupus-prone mice. Furthermore, unsaturated fatty acids also were shown in the past to influence mesenteric lymph node (MLN) lymphocyte function in healthy young rats. The MLN play a pivotal role in mediating food allergy. To date, the effect of R on intestinal immunity is not well understood; therefore we determined the effect of diet on MLN lymphocyte function. Mice were given either free access to a 5 g/100 g corn oil (CO) or fish oil (FO) diet or the same corn oil (CR) or fish oil (FR) diets restricted to 60% of the intake of the control group. At the age of 4 (young) and 8 (old) mo, MLN lymphocytes were isolated and B- (CD19+) and T- lymphocyte subsets (CD4+ and CD8+) were determined by flow cytometry. Additional MLN lymphocytes were placed in culture with or without concanavalin A and culture supernatants collected after 72 h for cytokine and immunoglobulin (lg) quantitation by ELISA. Aging significantly (P < 0.05) decreased both CD4+ and CD8+ T-lymphocytes. Spontaneous and activation- induced interleukin-4 (IL-4), IL-10, and interferon-γ secretion were greater while IL-2 was lower in CO-fed old mice compared to CO-fed young mice. In contrast, CR or FO alone partially blunted the age-dependent alterations in T-lymphocyte ratios including cytokine and lg secretion, whereas the FR diet significantly (P < 0.005) normalized the accelerated aging effects on these immune variables. We show for the first time that FR is a far more potent anti-inflammatory therapy than either CR or FO alone in modulating MLN lymphocyte function.
Original language | English (US) |
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Pages (from-to) | 1657-1664 |
Number of pages | 8 |
Journal | Journal of Nutrition |
Volume | 130 |
Issue number | 7 |
DOIs | |
State | Published - 2000 |
Keywords
- Cytokine
- Energy restriction
- Fatty acid
- Immunoglobulin
- Lymphocyte
- Mice
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Nutrition and Dietetics