Up-Regulation of Peroxisome Proliferator-Activated Receptors (PPAR-α) and PPAR-γ Messenger Ribonucleic Acid Expression in the Liver in Murine Obesity: Troglitazone Induces Expression of PPAR-γ-Responsive Adipose Tissue-Specific Genes in the Liver of Obese Diabetic Mice* * This work was supported by