Document Detail

Accumulation of estrogen in a vocal control brain region of a duetting song bird.
MedLine Citation:
PMID:  2713646     Owner:  NLM     Status:  MEDLINE    
Tritiated estradiol (E) was injected into bay wrens (Thryothorus nigricapillus), a tropical species in which females sing complex vocal duets with males. Autoradiographic analysis revealed that males and females have equal proportions of cells labeled by estradiol or its metabolites (E target cells) in a telencephalic region involved in song: the caudal nucleus of the ventral hyperstriatum (HVc). Other forebrain song regions failed to show labeling by E. E or its metabolites were accumulated, however, by cells in the midbrain song region ICo (the intercollicular nucleus) and in hypothalamic regions. This pattern of accumulation in the song system differs from that observed in a previous study in which bay wrens were injected with tritiated testosterone (T); T or its metabolites were accumulated by cells in HVc, RA (robust nucleus of the archistriatum), MAN (magnocellular nucleus of the neostriatum), ICo, and nXII (hypoglossal (nucleus). Such comparison suggests that cells in HVc have different steroid accumulation properties from those in other song regions. Bay wrens differ from zebra finches (Poephilia guttata), in which HVc contains very few E target cells. The wrens are more similar to canaries (Serinus canarius), because both species have E target cells in HVc, and females of both species are able to sing. The interspecies comparison raises the question of whether the ability of HVc cells to accumulate E or its metabolites in both species constitutes a precondition for the bisexual potential for song production.
E A Brenowitz; A P Arnold
Related Documents :
3073936 - Proliferation kinetics and cell lineages can be studied in whole mounts and macerates b...
20169356 - Intracellular bevacizumab reduces phagocytotic uptake in rpe cells.
16742806 - Biosynthesis of glycosoaminoglycans by microsomal preparations from cultured mastocytom...
20045446 - Short term treatment with estradiol decreases the rate of newly generated cells in the ...
24194146 - Ultrastructure of and plasmodesmatal frequency in mature leaves of sugarcane.
19414386 - G2-phase arrest through p21(waf1 / cip1) induction and cdc2 repression by gnidimacrin i...
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Brain research     Volume:  480     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1989 Feb 
Date Detail:
Created Date:  1989-06-16     Completed Date:  1989-06-16     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  119-25     Citation Subset:  IM    
Department of Psychology, University of Washington, Seattle 98195.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Birds / metabolism*,  physiology
Estradiol / metabolism*
Telencephalon / metabolism*,  physiology
Vocalization, Animal*
Grant Support
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  An HRP study of the central projections from primary sensory neurons innervating the rat masseter mu...
Next Document:  Uptake of leucine and alanine by cultured cerebral capillary endothelial cells.