A) Western blot and (B) quantitative RT-PCR analysis of PTP1B expression in Ad−/− mice and wild-type (WT) mice demonstrates reduced PTP1B expressed in Ad−/− mice compared with wild-type mice. (*p < 0.05 vs. WT). C) Data from quantitative RT-PCR shows PTP1B expression in rat HSCs after treatment with leptin (Lep, 100 ng/ml), adiponectin (Adi, 10 μg/ml), both (LA) or neither (Utx). Leptin suppressed PTP1B mRNA expression, while adiponectin stimulated PTP1B mRNA expression, whether administered alone or in the presence of leptin (*p < 0.05 vs. untreated).