title: Influence of genotype on the phospholipid fatty acid composition of splenic T and B lymphocytes in MRL/MpJ-lpr/lpr mice.
abstract: The MRL/MpJ-lpr/lpr mice manifest a T cell proliferative and autoimmune disorder. Similar changes occur much later in the life of MRL/MpJ-+/+ mice. MRL/MpJ-lpr/lpr (lpr/lpr) and MRL/MpJ-+/+ (+/+) mice were fed for six weeks nutritionally adequate semipurified diets containing 20% (w/w) fat, but differing in linoleic acid content. The phospholipid fatty acid composition of T and B cells was found to be dependent on genetic background of mice and level of linoleic acid in the diet. Changes in the levels of specific fatty acids like 16:0, 18:2 omega 6, 22:5 omega 3 and 22:6 omega 3 in some of the phospholipid components were observed in the MRL/MpJ-lpr/lpr strain in both the B and T cell types as compared with their normal +/+ counterpart strain. T cells of lpr/lpr mice exhibited significantly higher levels of 20:4 omega 6 than did T cells of other strain. High levels of dietary linoleic acid significantly increased incorporation of 18:2 omega 6 in T and B cells, while the effect on other fatty acids of the two types of cells varied with the phospholipid classes and fatty acids when compared with the low linoleic acid fed-group. Differences observed in the phospholipid fatty acid composition of the T and B cells of the congenic mice might contribute to differences in rate of progression of age-related changes suggesting that the autoimmune disorder might be mitigated by dietary manipulation.
authors.affiliation: Department of Foods and Nutrition, University of Alberta, Edmonton, Canada.
authors.forename: R K
authors.initials: RK
authors.lastname: Tiwari
authors.forename: J T
authors.initials: JT
authors.lastname: Venkatraman
authors.forename: B
authors.initials: B
authors.lastname: Cinader
authors.forename: J
authors.initials: J
authors.lastname: Flory
authors.forename: A
authors.initials: A
authors.lastname: Wierzbicki
authors.forename: Y K
authors.initials: YK
authors.lastname: Goh
authors.forename: M T
authors.initials: MT
authors.lastname: Clandinin
mesh_terms: D000818:Animals; D001327:Autoimmune Diseases / Q000178:diet therapy / Q000235:genetics* / Q000378:metabolism; D001402:B-Lymphocytes / Q000378:metabolism; D004042:Dietary Fats, Unsaturated / Q000008:administration & dosage; D005227:Fatty Acids / Q000378:metabolism*; D005260:Female; D005838:Genotype; D019787:Linoleic Acid; D008041:Linoleic Acids / Q000008:administration & dosage; D008214:Lymphocytes / Q000378:metabolism*; D051379:Mice; D008817:Mice, Mutant Strains; D010743:Phospholipids / Q000378:metabolism*; D013154:Spleen / Q000378:metabolism; D013601:T-Lymphocytes / Q000378:metabolism
chemical_list: D004042:Dietary Fats, Unsaturated; D005227:Fatty Acids; D008041:Linoleic Acids; D010743:Phospholipids; D019787:Linoleic Acid