Figure 2.
Dietary EPA increases the number and proportion of Tregs irrespective of the size of adipose tissue in ob/ob mice. ob/ob mice that lack leptin and express excess food intake and obesity were fed normal diet free of fish oils, or 5% EPA-containing diet for 4–5 weeks. (A) Body weight of ob/ob mice during treatment with 5% EPA starting from 5 weeks of age (n = 8). (B) Organ weight of ob/ob mice treated with 5% EPA (n = 8). (C) Serum adiponectin of mice fasted for 4 hours (n = 8). (D–H) Flow cytometric analysis of SVF of adipose tissues from 5% EPA-treated mice. (D) Number of Epididymal adipose tissue Treg per 1 g adipose tissue (n = 6). (E) Amount of total cell number per g adipose tissue (area of circular chart) and composition of stromal vascular fraction (% of total SVF). (F) Total cell number of SVF per tissue (n = 8). (G) Number of preadipocytes, hematopoietic cell and endothelial cells (n = 8). (H) Amount of CD45+ immune cell number per g adipose tissue (area of circular chart) and composition of immune cells (% of CD45+ cells). (I) Number of adipose immune cells (n = 8). Data are mean ± SEM. *P < 0.05, **P < 0.01 and ***P < 0.001. Epi, epididymal adipose tissue: Sub, subcutaneous adipose tissue: Mesen, mesenteric adipose tissue.