Abstract
Aging is associated with the loss of brain neurotransmitter function, which apparently is the substrate for an adverse constellation of age-associated symptoms. In particular, cholinergic deficits have been associated with cognitive impairment in aging. Systemic administration of GM1 ganglioside, 30 mg/kg, i.p., for 30 days, enhances the cholinergic neurochemical presynaptic markers, choline acetyltransferase, choline uptake, and acetylcholine, in the brain and spinal cord of aged 22-24-month-old Sprague-Dawley rats. In addition to correcting cholinergic neurochemistry, it improves spatial learning and memory impairment, and restores the number and the size of the cholinergic neurons in the basal forebrain and striatum. The induced neuronal recovery by GM1 is long-lasting.
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