a) CD4 and CD8 expression on CD3+ cells in spleen and SAT and VAT of B6 high fat diet (HFD) and normal chow diet (NCD) mice. b) Proportion of CD4+IFNγ+ (Th1) and CD4+IL-17+ (Th17) T-cells in spleen, SAT and VAT. c) Proportion of CD4+Foxp3+ (Treg) cells in spleen, SAT and VAT (upper panel: FACS plots; lower panel: pooled data; *p<0.03, t-test). d) Total number of CD3+CD4+, CD4+IFNγ+ (Th1), CD4+IL-17+ (Th17), CD4+Foxp3+ (Treg) T cells/g of SAT and VAT in normal chow diet and HFD mice (n=4–5/group, *p<0.05, t-test). e) T-bet (Th1):Foxp3 ratio in human VAT (upper left panel, r2=0.62, p<0.05). Lower left panel: VAT T-bet:Foxp3 ratio in patients with BMI>30 vs. <25 (*p<0.02, t-test). Upper right panel: Foxp3 (brown) and T-bet (blue, Th1 cells) in human VAT (BMI>30); lower right panel: BMI<25, bar 50 μm; T-bet:Foxp3 ratios from >200 stained cells/2 tissue levels. f) CD3+CD4+ T cells (%) with secondary re-rearranged. non-OVA TCRα detected by reduced OT2 TCRα:CD3 ratio in spleens, SAT and VAT of 6 or 16 wk old, regular diet or HFD B6 OT2 mice. g) TCRVα gene usage of CD4+ T cells isolated from spleens of 16 wk old obese wild type (WT) or OT2 mice, and from VAT of HFD and NCD WT and OT2 mice. CD4+ OT2 T cells were identified and sorted as in (f).