Insulin receptors in the brain cortex of aging mice.

The aim of the present study was to analyze whether aging also affects central insulin receptors in brain cortex as it does in whole brain of BALB/c-nu mice. Results showed statistically significant decrease of number and increase of affinity of insulin high affinity binding sites in old animals. As a consequence, central insulin actions, among which neuromodulation of monoaminergic system, can result altered during aging.