Corticosterone是肾上腺皮质类固醇，有盐皮质激素和糖皮质激素的活性。

Corticosterone is a sensitive inhibitor of monoamine transport.

Corticosterone, via SGK phosphorylation of GDI at Ser-213, increases the formation of GDI-Rab4 complex, facilitating the functional cycle of Rab4 and Rab4-mediated recycling of AMPARs to the synaptic membrane. It enhances AMPAR-mediated miniature excitatory postsynaptic current (mEPSC) amplitude and surface expression of GluR1 and GluR2 subunits in hippocampal neurons, increases the surface mobility and synaptic content of AMPAR GluR2 subunits, and enhances L-type calcium currents in CA1 pyramidal neurons. Corticosterone operates through mineralocorticoid receptors and glucocorticoid receptors, both of which belong to the family of nuclear receptors that bind to response elements in the DNA, thus modifying the activity of responsive genes[1].

Corticosterone plays an important role in regulating neuronal functions of the limbic system. After stress, the level of stress hormones such as corticosterone is markedly increased. Corticosterone exerts a time- and region-specific action on cellular physiology of limbic neurons[1].

HEK293 cells are grown in 6-cm dishes in 10% fetal bovine serum DMEM medium. When cells are 90% confluent, the medium is changed to 0.5% fetal bovine serum DMEM to limit serum-induced up-regulation of SGK. For in vitro phosphorylation analysis, the following approach is used. HEK293 cells are transfected with or without SGK1 small interfering RNA. One day after transfection, cells are treated without or with 100 nM corticosterone for 30 min, washed, and maintained in 0.5% fetal bovine serum DMEM for 1.5 h. Then cells are lysed in the CytoBuster protein extraction reagent containing protease inhibitors. Cell lysates are centrifuged at 16,000 × g at 4 °C for 20 min. The supernatants (40 μl, ～50 μg of total protein) are incubated with 1 μg of purified GST fusion protein of wild-type GDI or its mutants for 30 min at 30 °C in the reaction buffer (30 mM HEPES, pH 7.5, 10 mM MgCl2, 30 μM ATP, 1 μCi of [γ-32P]ATP, 100 nM calyculin, 1 μM okadaic acid). SDS-PAGE is carried out, and phosphorylated GDI is visualized with autoradiography.(Only for Reference)

50-22-6

C21H30O4

346.46

17-Deoxycortisol;Kendall's compound B;肾上腺酮;皮质酮;11β,21-Dihydroxyprogesterone

Ethanol:3.5 mg/mL (10 mM)
DMSO:34.7 mg/mL (100 mM)
Powder: -20°C for 3 years
In solvent: -80°C for 2 years