alexa Interaction of age and chronic estradiol replacement on memory and markers of brain aging.
Healthcare

Healthcare

Journal of Womens Health Care

Author(s): Foster TC, Sharrow KM, Kumar A, Masse J

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Abstract The current study examined effects of chronic estradiol replacement on cognition and biomarkers of aging. Young, middle-aged, and aged rats were ovariectomized and implanted with blank capsules, or capsules containing high or low doses of estradiol benzoate (EB). Three weeks later, animals were tested on inhibitory avoidance and cue and spatial discrimination on the Morris water maze. High plasma estradiol levels were associated with slower swim speed and impaired retention of inhibitory avoidance. No effect of EB treatment was observed for acquisition of the spatial discrimination task, however, a dose by age interaction was observed for retention of spatial discrimination such that higher retention scores were observed for young, middle-aged and aged animals under blank, low and high dose conditions, respectively. EB treatment reversed several hippocampal markers of age-related memory impairment, blocking induction of long-term depression and decreasing cytosolic calcineurin activity. Results indicate that the level of chronic hormone replacement interacts with age to influence hippocampal function.
This article was published in Neurobiol Aging and referenced in Journal of Womens Health Care

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