Compensatory mechanisms at the presynaptic level (e.g. increased dopamine-intake and dopamine-decarboxylation activity) may result in relatively higher striatal F-fluorodopa uptake in the initial phase of Parkinson's disease, underestimating the degree of nigral cell decrease (Nandhagopal et al., 2011).
Indeed, ethanol intake increases dopamine levels in several brain areas and adaptive changes in the dopamine transporter and receptors are associated with alcoholism in humans and rodent models [2], [45] [47].
Administration of amphetamine (AMPH) or nomifensine (NOM), drugs which increase synaptic dopamine concentration, inhibits food intake in virally rescued DD mice (vrDD) as in control animals.
Food intake induces a dopamine release in the striatum thereby exerting its rewarding effect [18].
In the mammalian brain, ECs modulate appetite via leptin-regulated circuits in the lateral hypothalamus or by direct activation of the mesolimbic dopamine "reward" pathways for food intake and thus may increase feeding behavior in animal models of obesity [19].
Furthermore, candidate gene association studies have focused primarily on genes involved in the central control of food intake, such as dopamine receptor (DRD2) (6, 7) and serotonin receptor (HTR2A) (8, 9), and the obesity genes fat mass obesity-associated protein (FTO) (10– 13) and MC4R (11, 13, 14 ).
This linkage between L-Dopa uptake and sodium transport explains why urinary dopamine increases after a high salt intake [ 20].
As previously mentioned, food intake induces a striatal dopamine release [18], so this can transiently lead to increased dopamine levels.
While adenosine receptor antagonists were shown to improve motor activity in MPTP administered primates [ 79, 80] and caffeine intake reduced MPTP-induced dopamine depletion in mice [ 81], agonist of the receptor disrupted dopamine transmission, resulting in exacerbated motor deficits in rodents [ 82].
Furthermore, sucrose consumption increases dopamine release in the nucleus accumbens [17], a brain area exhibiting opiate-like activation following excessive sugar intake [18].
However, many dairy and meat products are high in calories and fat, so exercise caution and monitor your caloric intake with this high-dopamine diet.
