نتایج جستجو برای: dopaminergic neurotransmission
تعداد نتایج: 27281 فیلتر نتایج به سال:
The compulsive gnawing (CG) test has been used for numerous years as an assay to determine the dopaminergic activity of various compounds. We developed a new method of quantification via a digitization step which allowed a more precise measurement of the gnawing activity. It was the aim of the present study to explore possible dopaminergic effects of salvinorin A (SA), the major active compound...
Parkinson's disease (PD) is the second most common neurodegenerative disorder, characterized by alterations of nigrostriatal dopaminergic neurotransmission. Compared to the wealth of data on the impairment of the dopamine system, relatively limited evidence is available concerning the role of major non-dopaminergic neurotransmitter systems in PD. Therefore, we comprehensively investigated the d...
Parkinsonism and attention deficit hyperactivity disorder (ADHD) are widespread brain disorders that involve disturbances of dopaminergic signaling. The sodium-coupled dopamine transporter (DAT) controls dopamine homeostasis, but its contribution to disease remains poorly understood. Here, we analyzed a cohort of patients with atypical movement disorder and identified 2 DAT coding variants, DAT...
Increased responsiveness to stress plays an important role in the manifestation of schizophrenia symptoms. Evidence indicates that the prefrontal cortex (PFC), and dopamine neurotransmission in the PFC in particular, is involved in the modulation of stress responsiveness. Decreased dopaminergic activity and loss of dopamine fibres have been reported in PFC in schizophrenia patients. Consequentl...
Although banned in the 1970s, significant levels of the organochlorine pesticide heptachlor are still present in the environment raising concern over potential human exposure. In particular, organochlorine pesticides have been linked to an increased risk of Parkinson's disease. Studies from our laboratory and others have demonstrated that exposure of laboratory animals to heptachlor alters the ...
Evidence suggests that nicotine and alcohol can each serve as a gateway drug. We determined whether prior treatment would alter amphetamine reward. Also, we examined age dopaminergic neurotransmission are important in this regard. Male female adolescent adult C57BL/6J mice were tested for baseline place preference. Mice then received six conditioning with saline/nicotine (0.25 mg/kg) twice dail...
Involvement of dopamine neurotransmission in human emotional processing is unclear but animal studies have indicated that it is critical for processing of fear response. In this experiment we examined dopaminergic involvement in the processing of human emotions. We used a novel dynamic molecular imaging technique to detect and map dopamine released during presentation of emotional stimuli. The ...
Glial cell line-derived neurotrophic factor (GDNF) is a potent survival factor for dopaminergic neurons of the nigrostriatal pathway that degenerate in Parkinson’s disease (PD). In animal models of PD, GDNF delivery has been shown to both protect dopaminergic neurons against toxin-induced injury and to rescue damaged neurons, promoting recovery of the motor deficit. GDNF may act both as a targe...
To delineate the modulatory effects of induced positive affect on cognitive control, the current study investigated whether positive affect increases the ability to suppress a reflexive saccade in the antisaccade task. Results of the antisaccade task showed that participants made fewer erroneous prosaccades in the condition in which a positive mood was induced compared to the neutral condition ...
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