BrianĀ Feldman

Publication Details

  • Glucocorticoid regulation of the circadian clock modulates glucose homeostasis PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA So, A. Y., Bernal, T. U., Pillsbury, M. L., Yamamoto, K. R., Feldman, B. J. 2009; 106 (41): 17582-17587

    Abstract:

    Circadian clock genes are regulated by glucocorticoids; however, whether this regulation is a direct or secondary effect and the physiological consequences of this regulation were unknown. Here, we identified glucocorticoid response elements (GREs) at multiple clock genes and showed that 3 were directly regulated by the glucocorticoid receptor. We determined that a GRE within the core clock gene Per2 was continuously occupied during rhythmic expression and essential for glucocorticoid regulation of that gene in vivo. We further demonstrated that mice with a genomic deletion spanning this GRE expressed elevated leptin levels and were protected from glucose intolerance and insulin resistance on glucocorticoid treatment but not from muscle wasting. We conclude that Per2 is an integral component of a particular glucocorticoid regulatory pathway and that glucocorticoid regulation of the peripheral clock is selectively required for some actions of glucocorticoids.

    View details for DOI 10.1073/pnas.0909733106

    View details for Web of Science ID 000270754400065

    View details for PubMedID 19805059

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