Related Experiment Videos
Sex differences in the activational effect of ERalpha on spatial learning
H N Fugger1, S G Cunningham, E F Rissman
1Neuroscience Graduate Program, University of Virginia, Charlottesville, Virginia, 22903, USA. tfoster@POP.UKY.EDU
Hormones and Behavior
|November 4, 1998
Summary
Estrogen receptor alpha (ERalpha) activation impairs spatial learning in female mice but not cue learning. This suggests ERalpha
Area of Science:
- Neuroendocrinology
- Behavioral Neuroscience
- Molecular Biology
Background:
- Estrogen receptor alpha (ERalpha) plays a critical role in various physiological processes.
- ERalpha's influence on cognitive functions, particularly spatial learning, is complex and sex-dependent.
Purpose of the Study:
- To investigate the specific role of ERalpha in mediating spatial discrimination learning.
- To determine if ERalpha activation differentially affects spatial versus cue learning in mice.
Main Methods:
- Utilized gonadectomized male and female wild-type (WT) and ERalpha knockout (ERalphaKO) mice.
- Administered estradiol benzoate (EB) or vehicle control.
- Assessed performance on the Morris water maze (spatial discrimination and cue versions).
Main Results:
- Female WT mice treated with EB showed impaired spatial learning, failing to find the hidden platform.
- All male mice (WT and ERalphaKO), WT females treated with oil, and ERalphaKO females learned the task.
- WT females (EB and oil-treated) demonstrated intact cue discrimination, ruling out sensory-motor deficits.
Conclusions:
- ERalpha activation specifically impairs the acquisition of spatial discrimination, not cue discrimination, in female mice.
- The findings suggest that ligand-bound ERalpha affects learning differently in males and females.
- Hypothesizes that ERalpha's impact on learning is developmentally organized.