Endocrine Abstracts

IGF1 concentrations have been reported to increase with 25-hydroxyvitamin D (25(OH)D) values in population studies, but it is unclear whether this association expresses a cause-effect relationship. Mice genetically deficient of steroid receptor coactivator 3, a transcriptional coactivator for the nuclear vitamin D receptor, have significantly lower circulating IGF1 levels than wild-types.We measured serum fasting 25(OH)D and IGF1 by enzyme- and radioimmu...

We found that mast cells were present in pubertal mammary glands, and hypothesized that they participate in mammary morphogenesis and are sensitive to IGF1, which is essential for mammary development.As independently reported in another model of mast cell deficiency (Developmental Biology 2010 337 124), mast cell-deficient W/Wv mice had significantly less terminal end buds and ducts and smaller gland areas than controls at 3, 6, ...

Abscissic acid (ABA) is a hormone best known for its role in plants. We previously showed that it is released by pancreatic beta-cells upon glucose stimulation, and autocrinally enhances insulin secretion.Here we additionally report that ABA promotes glucose uptake by rat L6 myoblasts and murine 3T3-L1 cells differentiated to adipocytes, at least partly by inducing GLUT-4 translocation to the plasma membrane.To determine whether AB...