CIDEA mRNA levels in WAT and BAT of mice. A and B: CIDEA (A) and β-2 microglobulin (β2-MG) (B) mRNA levels in WAT and BAT from C57BL/6J mice on normal diet (n = 3). C and D: Body weight increase (C) and ratios of CIDEA to β2-MG mRNA levels (D) in BAT from mice of three different strains fed cafeteria diet (□) or normal diet (▪). *P < 0.05, Mann-Whitney U test. N.D., not detectable; r.u., relative units.