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Human behavior is influenced by a number of brain neurotransmitters. Central dopamine, serotonin and melanocortin systems have special importance for male sexual function. We searched for associations between male aging symptoms and polymorphic sites of serotonin (5-HTR1B), melanocortin (MC4R) and dopamine (DRD2, DRD4) receptors.

Polymorphic Variants of Neurotransmitter Receptor Genes May Affect Sexual Function in Aging Males: Data from the HALS Study