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Adult male rat hippocampus synthesizes estradiol from pregnenolone by cytochromes P45017alpha and P450 aromatase localized in neurons.
In adult mammalian brain, occurrence of the synthesis of estradiol from endogenous cholesterol has been doubted because of the inability to detect dehydroepiandrosterone synthase, P45017alpha. InExpand
Rapid modulation of long‐term depression and spinogenesis via synaptic estrogen receptors in hippocampal principal neurons
Rapid modulation of hippocampal synaptic plasticity by estrogen has long been a hot topic, but analysis of molecular mechanisms via synaptic estrogen receptors has been seriously difficult. Here, twoExpand
Comparison between hippocampus-synthesized and circulation-derived sex steroids in the hippocampus.
Estradiol (E2) and other sex steroids play essential roles in the modulation of synaptic plasticity and neuroprotection in the hippocampus. To clarify the mechanisms for these events, it is importantExpand
Rapid modulation of synaptic plasticity by estrogens as well as endocrine disrupters in hippocampal neurons
Estrogen modulates memory-related synaptic plasticity not only slowly but also rapidly in the hippocampus. However, molecular mechanisms of the rapid action are yet largely unknown. We here describeExpand
Modulation of synaptic plasticity by brain estrogen in the hippocampus.
The hippocampus is a center for learning and memory as well as a target of Alzheimer's disease in aged humans. Synaptic modulation by estrogen is essential to understand the molecular mechanisms ofExpand
Rapid spinogenesis of pyramidal neurons induced by activation of glucocorticoid receptors in adult male rat hippocampus.
Modulation of hippocampal synaptic plasticity by glucocorticoids has been attracting much attention, due to its importance in stress responses. Dendritic spines are essential for memory storageExpand
Comparison between basal and apical dendritic spines in estrogen-induced rapid spinogenesis of CA1 principal neurons in the adult hippocampus.
Modulation of hippocampal synaptic plasticity by estrogen has been attracting much attention. Here, we demonstrated the rapid effect of 17beta-estradiol on the density and morphology of spines in theExpand
Estrogen synthesis in the brain—Role in synaptic plasticity and memory
Estrogen and androgen are synthesized from cholesterol locally in hippocampal neurons of adult animals. These neurosteroids are synthesized by cytochrome P450s and hydroxysteroid dehydrogenasesExpand
Studies on the formation of germ cells in a compound ascidian Botryllus, primigenus oka
Gametogenesis of a compound ascidian Botryllus primigenus was studied histologically. On either side of the zooid (stage 9), in the gonadal space between the epidermis and the atrial epithelium,Expand
Estrogen induces rapid decrease in dendritic thorns of CA3 pyramidal neurons in adult male rat hippocampus.
Modulation of hippocampal synaptic plasticity by estrogen has been attracting much attention. Thorns of thorny excrescences of CA3 hippocampal neurons are post-synaptic regions whose presynapticExpand
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