کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5814338 1556627 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Psychostimulants, antidepressants and neurokinin-1 receptor antagonists ('motor disinhibitors') have overlapping, but distinct, effects on monoamine transmission: The involvement of L-type Ca2+ channels and implications for the treatment of ADHD
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
Psychostimulants, antidepressants and neurokinin-1 receptor antagonists ('motor disinhibitors') have overlapping, but distinct, effects on monoamine transmission: The involvement of L-type Ca2+ channels and implications for the treatment of ADHD
چکیده انگلیسی


- The monoamine response to NK1R antagonists differs from psychostimulants and antidepressants.
- NK1R possibly modulate motor behaviour by activating L-type Ca(v) channel-opening.
- Blunted motor activity in depression could be the opposite of hyperactivity/impulsivity in ADHD.
- Evidence points to a beneficial effect of L-type Ca(v) channel blockers in treating ADHD.

Both psychostimulants and antidepressants target monoamine transporters and, as a consequence, augment monoamine transmission. These two groups of drugs also increase motor activity in preclinical behavioural screens for antidepressants. Substance P-preferring receptor (NK1R) antagonists similarly increase both motor activity in these tests and monoamine transmission in the brain. In this article, the neurochemical and behavioural responses to these three groups of drugs are compared. It becomes evident that NK1R antagonists represent a distinct class of compounds ('motor disinhibitors') that differ substantially from both psychostimulants and antidepressants, especially during states of heightened arousal or stress. Also, all three groups of drugs influence the activation of voltage-gated Ca(v)1.2 and Ca(v)1.3 L-type channels (LTCCs) in the brain, albeit in different ways. This article discusses evidence that points to disruption of these functional interactions between NK1R and LTCCs as a contributing factor in the cognitive and behavioural abnormalities that are prominent features of Attention Deficit Hyperactivity Disorder (ADHD). Arising from this is the interesting possibility that the hyperactivity and impulsivity (as in ADHD) and psychomotor retardation (as in depression) reflect opposite poles of a behavioural continuum. A better understanding of this pharmacological network could help explain why psychostimulants augment motor behaviour during stress (e.g., in preclinical screens for antidepressants) and yet reduce locomotor activity and impulsivity in ADHD.This article is part of the Special Issue entitled 'CNS Stimulants'.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropharmacology - Volume 87, December 2014, Pages 9-18
نویسندگان
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