title: Rapid estrogen signaling in the brain: implications for the fine-tuning of neuronal circuitry.
abstract: Rapid actions of estrogens were first described >40 years ago. However, the importance of rapid estrogen-mediated actions in the CNS is only now becoming apparent. Several lines of evidence demonstrate that rapid estrogen-mediated signaling elicits potent effects on molecular and cellular events, resulting in the "fine-tuning" of neuronal circuitry. At an ultrastructural level, the details of estrogen receptor localization and how these are regulated by the circulating hormone and age are now becoming evident. Furthermore, the mechanisms that allow membrane-associated estrogen receptors to couple with intracellular signaling pathways are also now being revealed. Elucidation of complex actions of rapid estrogen-mediated signaling on synaptic proteins, connectivity, and synaptic function in pyramidal neurons has demonstrated that this neurosteroid engages specific mechanisms in different areas of the brain. The regulation of synaptic properties most likely underlies the fine-tuning of neuronal circuitry. This in turn may influence how learned behaviors are encoded by different circuitry in male and female subjects. Importantly, as estrogens have been suggested as potential treatments of a number of disorders of the CNS, advancements in our understanding of rapid estrogen signaling in the brain will serve to aid in the development of potential novel estrogen-based treatments.
authors.affiliation: Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA. d-srivastava@northwestern.edu
authors.forename: Deepak P
authors.initials: DP
authors.lastname: Srivastava
authors.forename: Elizabeth M
authors.initials: EM
authors.lastname: Waters
authors.forename: Paul G
authors.initials: PG
authors.lastname: Mermelstein
authors.forename: Enikö A
authors.initials: EA
authors.lastname: Kramár
authors.forename: Tracey J
authors.initials: TJ
authors.lastname: Shors
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology*; D004958:Estradiol / Q000494:pharmacology; D004967:Estrogens / Q000378:metabolism* / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D009415:Nerve Net / Q000187:drug effects* / Q000502:physiology; D009473:Neuronal Plasticity / Q000187:drug effects; D009474:Neurons / Q000187:drug effects*; D014176:Protein Biosynthesis / Q000187:drug effects; D011960:Receptors, Estrogen / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*
chemical_list: D004967:Estrogens; D011960:Receptors, Estrogen; D004958:Estradiol
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