[A]: Serum IGF-I levels in homozygous and heterozygous TRα0/0 and TRβ mutant mice and corresponding WT littermates at 14 days of age. A = P<0.01 vs WT mice of the same genotype, B = P<0.01 vs heterozygous mice of the same genotype. N = 8–12 mice per genotype. [B-C]: IGF-I mRNA levels in the liver, bone, cartilage and muscle of homozygous and heterozygous TRα0/0 (B) and TRβ (C) mutant mice and corresponding WT littermate control mice at 14 days of age. Values are fold-change of WT control mice. A = P<0.01 vs WT mice of the same genotype, B = P<0.01 vs heterozygous mice of the same genotype. N = 8 mice per group. [D-F]: ALS (D), IGFBP-3 (E) and IGFBP-5 (F) mRNA levels in the liver of homozygous and heterozygous TRα0/0 and TRβ mutant mice and corresponding WT littermates at 14 days of age. A = P<0.01 vs WT mice of the same genotype, B = P<0.01 vs heterozygous mice of the same genotype. N = 8–12 mice per genotype.