Open Access. Powered by Scholars. Published by Universities.®
Translational Medical Research Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Translational Medical Research
Thiazolidinediones Inhibit Lipoprotein Lipase Activity In Adipocytes, Subramanian Ranganathan, Philip A. Kern
Thiazolidinediones Inhibit Lipoprotein Lipase Activity In Adipocytes, Subramanian Ranganathan, Philip A. Kern
Clinical and Translational Science Faculty Publications
The thiazolidinediones troglitazone and BRL 49653 improve insulin sensitivity in humans and animals with insulin resistance. Adipose tissue lipoprotein lipase is an insulin-sensitive enzyme. We examined the effects of thiazolidinediones on lipoprotein lipase expression in adipocytes. When added to 3T3-F442A, 3T3-L1, and rat adipocytes in culture, troglitazone and BRL 49653 inhibited lipoprotein lipase activity. This inhibition was observed at concentrations as low as 0.1 μM and within 2 h after addition of the drug. Lipoprotein lipase activity was inhibited in differentiated adipocytes as well as the differentiating cells. Despite this decrease in enzyme activity, these drugs increased mRNA levels in …
Lack Of Effect Of Leptin On Glucose Transport, Lipoprotein Lipase, And Insulin Action In Adipose And Muscle Cells, Subramanian Ranganathan, Theodore P. Ciaraldi, Robert R. Henry, Sunder Mudaliar, Philip A. Kern
Lack Of Effect Of Leptin On Glucose Transport, Lipoprotein Lipase, And Insulin Action In Adipose And Muscle Cells, Subramanian Ranganathan, Theodore P. Ciaraldi, Robert R. Henry, Sunder Mudaliar, Philip A. Kern
Clinical and Translational Science Faculty Publications
The effect of leptin on glucose transport, lipogenesis, and lipoprotein lipase activity was studied in cultured rat adipocytes and 3T3-L1 adipocytes. Leptin had no effect on basal and insulin stimulated glucose transport in isolated adipocytes from the rat and the genetically obese mouse. The incorporation of glucose into lipids was also unaffected. Lipoprotein lipase (LPL) activity remained unchanged in response to leptin in these cells, as well as in minced adipose tissue. Leptin also had no effect on both basal and insulin-stimulated glucose transport in cultured rat and human skeletal muscle cells. These studies showed that leptin had no effect …