Dopamine is a neurotransmitter that is produced in the substantia nigra, ventral tegmental area, and hypothalamus of the brain. Dysfunction of the dopamine system has been implicated in different nervous system diseases. The level of dopamine transmission increases in response to any type of reward and by a large number of strongly additive drugs. The role of dopamine dysfunction as a consequence of oxidative stress is involved in health and disease. Introduce new potential targets for the development of therapeutic interventions based on antioxidant compounds. The present review focuses on the therapeutic potential of antioxidant compounds as a coadjuvant treatment to conventional neurological disorders is discussed.
The aim of the present study is to evaluate the oxidative damage in rats of different ages. Weaned rats of 25 g and adults of 300 g were used in groups of 6, a single i.p. dose of morphine sulfate of 3, 6 or 12 mg/kg was administered. All animals were sacrificed to measure GSH and 5-HT levels in brain by liquid chromatography, as well as Na(+), K(+)-ATPase and total ATPase enzymatic activity. 5-HT levels decreased significantly (p < 0.05) in adult animals that received 3 and 6 mg morphine. Na(+), K(+)-ATPase activity increased significantly (p < 0.05) in all groups of weaned animals. In adult animals, Na(+), K(+)-ATPase and total ATPase partially diminished. GSH levels diminished significantly (p < 0.05) both in weaned and in adult groups. The results indicate age-induced changes in cellular regulation and biochemical responses to oxidative stress induced by morphine.
Oseltamivir is used for the treatment of AH1N1 swine influenza in Mexico. The aim of the present study was to analyze the effect of oseltamivir on dopamine levels in patients exposed to vitamins A, D, and C as well as to ozone. For this, forty male Wistar rats (80 g) were divided into 6 groups. A combination of oseltamivir (20 vmg/kg) with A (39 v0UI.), C (30 mg) and D (60 UI.) vitamins with or without ozone 0.5 ppm were intraperitoneally administered for 5 days. The exposition to ozone was through a camera controlled. The animals were sacrificed and the brain dissected in cortex (I), hemispheres (II) and cerebellum/medulla oblongata (III) to measure dopamine, glutathione (GSH) and lipoperoxidation using fluorescence. Dopamine increased in I, II and III regions while GSH increased only in II and III regions and lipoperoxidation decreased in the same regions. This changes were significant (p < 0.05) in the groups that received oseltamivir and ozone. Administration of oseltamivir and ozone induces synergic effect on dopamine metabolism.
Major depressive disorder (MDD) is one of the most common psychiatric illnesses in the general population. In mental disorders, the activation of inflammatory pathways in the brain is a major producer of excitotoxicity and an inducer of oxidative stress. The occurrence of these 2 events is partly responsible for the neuronal damage inherent in patients with mental disorders. In the case of MDD, the release of hormone and increase in pro-inflammatory cytokines in plasma and indicators of oxidative stress have been identified as consequences of this event. The most important affectations in patients with MDD are changes in their cognitive and executive functions due to brain inflammation. Hence, these biomarkers can serve as diagnostic and severity classification tools and treatment. In this work, we described the communication pathway between the immune and neuroendocrine systems in MDD and suggested possible therapeutic options for the disease.
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