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The present studies compared the regulation of the neurotrophin ligands and receptors by estrogen in young adult and reproductively senescent rats. Both groups of animals were ovariectomized and replaced with 17β-estradiol or placebo pellets for 4 weeks. Protein expression of specific neurotrophins and their receptors were measured in the olfactory bulb and its basal forebrain afferent, the horizontal...
Altered neuronal responses to trophic factors may play a role in neuronal maintenance in adulthood and may also be involved in neuronal atrophy in old age. We have investigated this issue in the rat iris, studying responsiveness of sympathetic and sensory iridial nerves to a range of NGF concentrations in mature and aged rats. We show here that growth responses of sensory nerves to NGF, as measured...
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