D Nutt

..This research has identified novel potential targets, with the goal of developing new antidepressant drugs with better efficacy and faster onset of action than current "gold-standard" treatments...

..The findings of structural and functional neuroimaging studies of PTSD are reviewed as they relate to our current understanding of the pathophysiology of this disorder...

..Finally, some pointers to future research and especially to drug development by pharma are elaborated...

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..In addition, the faculty discussed the importance of patient psychoeducation and self-management as well as the ways in which disease models of depression affect treatment...

..There is no evidence they are addictive in the formal sense of leading to a drug dependence syndrome. Some suggestions on the way these issues can be more precisely defined and studied in future are given...

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..Our methodology offers a systematic framework and process that could be used by national and international regulatory bodies to assess the harm of current and future drugs of abuse...

..In addition, how this large and unique dataset may be utilized for maximum benefit to patients is outlined...

..We hope that, by the time these guidelines are updated, much evidence will be available to address the many directions for future research that are detailed here...

..Focusing treatment on the predominant or driving symptomatology for an individual patient with major depression could potentially improve rates of response and remission...

..Prescribing physicians must take into account these abnormalities when choosing a drug. Effective diagnosis and treatment should improve patients' quality of life and their prognosis for recovery...

..Additional research is needed to determine whether anxiolytic effect occurs in generalized anxiety disorder populations by day 1 or within 3-4 h post-first dose...

..In the 40 years since the first benzodiazepine was brought into clinical use there has been a substantial growth in understanding the molecular basis of action of these drugs and the role of their receptors in disease states...

..In conclusion, mirtazapine has a good tolerability and safety profile that demonstrates several benefits over other antidepressants...

..Variations in sleep patterns have also been assessed and indicate a biological separation from depression...

..Taken together, the data collected over the last 40 years have allowed the emergence of a unified monoamine hypothesis of antidepressant drug action...

..Finally, current pharmacological and non-pharmacological treatment options for GAD are reviewed, with particular attention being paid to published clinical-trial data...

..This article reviews current knowledge regarding the psychobiology of PTSD and considers specific agents that are emerging as key modulators of this pathological process...

..This article presents the conclusions of this consensus and illustrates it using published data in the field of antidepressant treatment of generalized anxiety disorder...

..A greater understanding of the brain mechanisms underlying the adverse effects of alcohol is now possible, thanks to significant research advances made over the past decade...

..Finally, a new class of drugs, which show selectivity for imidazoline receptors is described. These compounds are shown to similarly increase extracellular NA in the PFC. Their potential utility as clinical treatments is discussed...

..This paper will provide evidence to demonstrate the short- and long-term efficacy of SSRIs in the treatment of depression and comorbid anxiety, with most clinical evidence supporting the anxiolytic profile of the SSRI paroxetine...

..Future research in this field will greatly benefit from recent advances in neuroimaging techniques and the discovery of novel ligands targeting specific receptors...

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..It is unknown whether this is because serotonin function plays a part in determining the dimension of trait impulsiveness in the general population or whether this is restricted to these behaviourally extreme groups...

..We argue for a translational approach to addiction science, using an important current research question as a case study...

..Although some studies indicate a role for COMT in emotionality, anxiety, and depression in adults, no direct effect or interaction of COMT genotype was observed in this large sample of young children...

..Studies of brain connectivity can now begin to help further unravel the tangle of disparate brain regions and their connections that underpin the psychopharmacological processes of dependence...

..Young cohorts are essential to improve our understanding of the impact of development on gene and environment interactions...

..We review GABA, serotonin, glutamate, noradrenaline, dopamine and some neuropeptides herein...

..However, there was a significant reduction in SWS produced by only the combination treatment, which may suggest a specific effect of the combination on non-REM sleep mechanisms...

..This suggests a difference in serotonergic functioning between these two groups and provides evidence to support the hypothesis that 5-HT dysfunction is involved in IBS...

..Results are discussed in light of current cognitive approaches to alcohol dependence...

..A single breath of 35% CO(2) safely and reliably produced sympathetic and HPA axis activation and should prove a useful addition to currently available laboratory tests of the human stress response...

..This article briefly describes current treatments, both evidence-based and common practice, and goes on to describe some emerging approaches...

..The aim of this study was to measure GABAA benzodiazepine receptor (GBzR) sensitivity in alcohol-dependent patients and compare with matched non-dependent drinkers...

..05). These findings demonstrate that females with diarrhoea-predominant IBS have an exaggerated pressor response to 35% CO(2) stress challenge, suggesting a more stress-responsive sympathetic nervous system...

..Advances in genetic engineering have led to the development of transgenic mouse models that have further refined our understanding of the pharmacology and physiology for various GABAA receptor subunits...

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..Sufficient and significant differences between these disorders support the view that they are independent entities. Shared abnormalities in the 5HT1A receptor function, for example, may help explain some of the comorbidity...

..Alternative means may be needed to address clinical issues regarding opioid receptor occupancy that are required to optimize treatment strategies...

..This paper reviews some of the evidence and attempts to relate and compare these findings across species from the human to the Drosophila...

..These data indicate that the high affinity site which is occupied by [(3)H]2BFI and irreversibly binds BU99006, is not the same as that which causes inhibition of MAO, and may point to the existence of another I(2) binding site...

..It is the major problem facing efforts to identify the possible 'suicidal effects' of antidepressants...

..Insomnia is a common and disabling complaint for which there is a need for improved treatments. Successful drug discovery relies on the use of appropriate animal models to assess likely outcome in the clinic...

..In addition, BU98008 did not appear to affect serotonergic neurotransmission in the frontal cortex. In conclusion, the present study demonstrates that BU98008 shares some functional similarities with known selective I(2)-BS ligands...

..Although opioid receptor function in humans is clearly reduced during opioid dependence, what happens to the receptor in early abstinence is not understood...

..These results support a role for the DA system in nicotine addiction, but reveal a more complex relationship than suggested by studies in animals...

..Comparisons with the finding in opiate dependence suggest a shared region, the anterior cingulate/left medial prefrontal cortex is involved in the cue response in dependent subjects but not controls...

..Only SSRIs have been proven effective and safe in long-term randomized controlled trials. Current guidelines from the Expert Consensus Panel for PTSD recommend treatment of chronic PTSD for a minimum of 12-24 months...

..Long-term efficacy and ease of use are important considerations in treatment selection, as maintenance treatment is recommended for at least 12-24 months, and in some cases, indefinitely...

..Further, pharmacotherapy for a minimum of 1-2 years is recommended before very gradual withdrawal may be considered...

..This argues that neural circuits of dependence and craving are not specific "craving" or "addiction" brain regions but are "normal" circuits activated to a greater degree...

..The partial discrepancy between subjective and objective measures suggests that a cognitive element is combined with the biological element to produce the sleep problems reported by depressed patients...

..g cholinergic effects). Overall, the results suggest that caffeine counteracts reductions in the turnover of central noradrenaline. This mechanism may underlie the beneficial effects of caffeine seen in low alertness states...

..Selective I(2) receptor ligands modulate central monoamine levels and activate the hypothalamo-pituitary-adrenal (HPA) axis and may have potential as antidepressants...

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..Therefore, the differences in functional effects observed with these compounds may reflect agonist and antagonist properties...

..The authors conclude that [11C]Ro15 4513 PET labels in vivo the GABA-benzodiazepine receptor containing the alpha5 subtype in limbic structures and can be used to further explore the functional role of this subtype in humans...

..It also had a significant cardiovascular and psychological (anxiogenic) effect, as expected from previous published studies. The test is potentially useful in studying the responsivity of the HPA axis in health and disease...

..In light of the chronicity and disability associated with social phobia, as well as the high relapse rate after short-term therapy, it is recommended that effective treatment be continued for at least 12 months...

..Treatment gains after a 12-week course of CBT may be maintained for up to 1 year. Currently, no guidelines exist for the long-term treatment of GAD...

..Data by [Bell et al. J Psychopharmacol (2002) 16:5-14] suggest that a decrease in 5-HT neurotransmission predisposes to panic attacks and that the antipanic effect of SSRIs depends upon the availability of 5-HT in the brain...

..In these studies we have shown that this CO2 model of anxiety is sensitive to lorazepam and to a lesser extent paroxetine. This gives support to its utility as an experimental model of general anxiety disorder in healthy volunteers...

..Using the MAO-A knockout mice it was also possible to demonstrate a non-MAO-A population of binding sites labelled by the putative I-BS endogenous ligand, harmane...

..Wakefulness in sleep was significantly greatest after morning eptapirone. REM sleep effects were greatest after evening eptapirone, suggesting a greater effect on central serotonin receptors than that of buspirone...

..The guidelines cover the diagnosis of anxiety disorders and key steps in clinical management, including acute treatment, relapse prevention and approaches for patients who do not respond to first-line treatments...

..Further evidence for a non-MAO, IBS [3H]harmane population has not been shown but the high level of expression of the MAO-A site is likely to have masked the much smaller population of I2BS...

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..These data provide further evidence for the uptake and distribution of antisense oligonucleotides in neuronal tissue in vivo...

..CONCLUSIONS: Acute tryptophan depletion remains a useful psychiatric research tool. The findings from the clinical studies reviewed here are summarized and implications for future research detailed...

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..This finding supports the notion that SSRIs improve social anxiety by increasing 5-HT availability. The autobiographical script seems to be a more robust challenge test for SAD than the stressful verbal task...

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..This implies that in panic disorder increased 5-HT availability is important in maintaining the response to SSRIs...