Complementary medicine, self-help, and lifestyle interventions for obsessive compulsive disorder (OCD) and the OCD spectrum: a systematic review

Efficacy of lifestyle medicine on sleep quality: A meta-analysis of randomized controlled trials

OBJECTIVES

Randomized controlled trials (RCTs) on the efficacy of multicomponent lifestyle medicine (LM) interventions for improving sleep quality have yielded inconsistent findings. This study marks the first meta-analysis to evaluate the efficacy of multicomponent LM interventions in improving sleep quality.

METHODS

We searched six online databases for RCTs that compared multicomponent LM interventions to an active or inactive control group in an adult population and assessed subjective sleep quality as a primary or secondary outcome using validated sleep measures at any post-intervention time-point.

RESULTS

A total of 23 RCTs with 26 comparisons involving 2534 participants were included in the meta-analysis. After excluding outliers, the analysis revealed that multicomponent LM interventions significantly improved sleep quality at immediate post-intervention (d = 0.45) and at short-term follow-up (i.e., <three months) (d = 0.50) relative to an inactive control group. Regarding the comparison with active control, no significant between-group difference was found at any time-point. No meta-analysis was conducted at the medium- and long-term follow-up due to insufficient data. Subgroup analyses supported that multicomponent LM interventions had a more clinically relevant effect on improving sleep quality in participants with clinical levels of sleep disturbance (d = 1.02) relative to an inactive control at immediate post-intervention assessment. There was no evidence of publication bias.

CONCLUSION

Our findings provided preliminary evidence that multicomponent LM interventions were efficacious in improving sleep quality relative to an inactive control at immediate post-intervention and at short-term follow-up. Additional high-quality RCTs targeting individuals with clinically significant sleep disturbance and long-term follow-up are warranted.

Neurobiology and Applications of Inositol in Psychiatry: A Narrative Review

Inositol is a natural sugar-like compound, commonly present in many plants and foods. It is involved in several biochemical pathways, most of them controlling vital cellular mechanisms, such as cell development, signaling and nuclear processes, metabolic and endocrine modulation, cell growth, signal transduction, etc. In this narrative review, we focused on the role of inositol in human brain physiology and pathology, with the aim of providing an update on both potential applications and current limits in its use in psychiatric disorders. Overall, imaging and biomolecular studies have shown the role of inositol levels in the pathogenesis of mood disorders. However, when administered as monotherapy or in addition to conventional drugs, inositol did not seem to influence clinical outcomes in both mood and psychotic disorders. Conversely, more encouraging results have emerged for the treatment of panic disorders. We concluded that, despite its multifaceted neurobiological activities and some positive findings, to date, data on the efficacy of inositol in the treatment of psychiatric disorders are still controversial, partly due to the heterogeneity of supporting studies. Therefore, systematic use of inositol in routine clinical practice cannot be recommended yet, although further basic and translational research should be encouraged.

Psychotherapies and digital interventions for OCD in adults: What do we know, what do we need still to explore?

BACKGROUND

Despite significant advances in the understanding and treatment of obsessive compulsive disorder (OCD), current treatment options are limited in terms of efficacy for symptom remission. Thus, assessing the potential role of iterative or alternate psychotherapies is important. Also, the potential role of digital technologies to enhance the accessibility of these therapies, should not be underestimated. We also need to embrace the idea of a more personalized treatment choice, being cognisant of clinical, genetic and neuroimaging predictors of treatment response.

PROCEDURES

Non-systematic review of current literature on emerging psychological and digital therapies for OCD, as well as of potential biomarkers of treatment response.

FINDINGS

A number of 'third wave' therapies (e.g., Acceptance and Commitment Therapy, Mindfulness-Based Cognitive Therapy) have an emerging and encouraging evidence base in OCD. Other approaches entail employment of elements of other psychotherapies such as Dialectical Behaviour Therapy; or trauma-focussed therapies such as Eye Movement Desensitisation and Reprocessing, and Imagery Rescripting and Narrative Therapy. Further strategies include Danger Ideation Reduction Therapy and Habit Reversal. For these latter approaches, large-scale randomised controlled trials are largely lacking, and the precise role of these therapies in treating people with OCD, remains to be clarified. A concentrated 4-day program (the Bergen program) has shown promising short- and long-term results. Exercise, music, and art therapy have not been adequately tested in people with OCD, but may have an adjunctive role. Digital technologies are being actively investigated for enhancing reach and efficacy of psychological therapies for OCD. Biomarkers, including genetic and neuroimaging, are starting to point to a future with more 'personalised medicine informed' treatment strategizing for OCD.

CONCLUSIONS

There are a number of potential psychological options for the treatment of people with OCD who do not respond adequately to exposure/response prevention or cognitive behaviour therapy. Adjunctive exercise, music, and art therapy might be useful, albeit the evidence base for these is very small. Consideration should be given to different ways of delivering such interventions, including group-based, concentrated, inpatient, or with outreach, where appropriate. Digital technologies are an emerging field with a number of potential applications for aiding the treatment of OCD. Biomarkers for treatment response determination have much potential capacity and deserve further empirical testing.

Antioxidant and antimicrobial activities of phytonutrients as antibiotic substitutes in poultry feed

Globally, there is increasing demand for safe poultry food products free from antibiotic residues. There is thus a need to develop alternatives to antibiotics with safe nutritional feed derivatives that maximize performance, promote the intestinal immune status, enrich beneficial microbiota, promote health, and reduce the adverse effects of pathogenic infectious microorganisms. With the move away from including antibiotics in poultry diets, botanicals are among the most important alternatives to antibiotics. Some botanicals such as fennel, garlic, oregano, mint, and rosemary have been reported to increase the poultry's growth rate and/or feed to gain ratio. Botanicals' role is assumed to be mediated by improved immune responses and/or shifts in the microbial population in the intestine, with the elimination of pathogenic species. In addition, modulation of the gut microbiota resulted in various physiological and immunological responses and promoted beneficial bacterial strains that led to a healthy gut. There is thus a need to understand the relationship between poultry diets supplemented with botanicals and good health of the entire gastrointestinal tract if we intend to use these natural products to promote general health status and production. This current review provides an overview of current knowledge about certain botanicals that improve poultry productivity by modulating intestinal health and reducing the negative impacts of numerous pathogenic bacteria. This review also describes the efficacy, negative effects, and modes of action of some common herbal plants applied in poultry as alternatives to reduce the use of antibiotics.

The clinical characterization of the adult patient with an anxiety or related disorder aimed at personalization of management

The clinical construct of "anxiety neurosis" was broad and poorly defined, so that the delineation of specific anxiety disorders in the DSM-III was an important advance. However, anxiety and related disorders are not only frequently comorbid, but each is also quite heterogeneous; thus diagnostic manuals provide only a first step towards formulating a management plan, and the development of additional decision support tools for the treatment of anxiety conditions is needed. This paper aims to describe systematically important domains that are relevant to the personalization of management of anxiety and related disorders in adults. For each domain, we summarize the available research evidence and review the relevant assessment instruments, paying special attention to their suitability for use in routine clinical practice. We emphasize areas where the available evidence allows the clinician to personalize the management of anxiety conditions, and we point out key unmet needs. Overall, the evidence suggests that we are becoming able to move from simply recommending that anxiety and related disorders be treated with selective serotonin reuptake inhibitors, cognitive-behavioral therapy, or their combination, to a more complex approach which emphasizes that the clinician has a broadening array of management modalities available, and that the treatment of anxiety and related disorders can already be personalized in a number of important respects.

Yoga therapy for Obsessive Compulsive Disorder (OCD): A case series from India

Yoga is an ancient science which has been found to be helpful in the management of several psychiatric disorders including Obsessive Compulsive Disorder (OCD). Yoga as add-on treatment in OCD may help address issues like partial response and adverse effects of medications. However, research in this area is sparse, which led us to explore it through this case series. In this case series we have described the benefits of 1 month of yoga as add-on treatment in patients with OCD. All patients were on stable doses of medications prior to and during yoga practice. Pre-post assessments for the core symptoms of obsession/compulsions as well as depressive and anxiety symptoms were done. The assessments showed significant improvement in Y-BOCS and HAM-D scores after 1 month of yoga. Yoga therapy could be an effective add-on therapy for the treatment of OCD.

A narrative review of exercise and obsessive-compulsive disorder

OBJECTIVE

Individuals with obsessive-compulsive disorder (OCD) suffer significant distress due to their condition; however, there can be multiple barriers to treatment. Even following OCD-tailored treatment, symptoms often remain. Exercise may be an effective and available approach to managing OCD, and yet, there are no specifically dedicated reviews, limiting integration into clinical practice. This study aimed to provide an overview of the literature on exercise and OCD.

METHOD

Four databases, the Cochrane Central Register of Controlled Trials, MEDLINE, PsycINFO, and EMBASE, were systematically searched. 1534 records were screened and the reference lists of eligible articles were examined. For this review, 11 extracted studies were narratively explored.

RESULTS

Two observational and nine interventional studies were included, of which one article focused on youth and ten studies focused on adults. Physical activity likely reduces the risk of metabolic syndrome or general health conditions. Several pre-post studies demonstrated exercise's benefits for OCD symptoms, while the only randomized controlled trial showed negative findings for its efficacy in reducing obsessions and compulsions.

CONCLUSIONS

The evidence for aerobic exercise's long-term benefits for the symptoms of OCD is mixed, but remains promising. Potential mechanisms of exercise's effects and future directions for research are explored.

The Perception of Physical Health Status in Obsessive-Compulsive Disorder: A Systematic Review and Meta-Analysis

Background:

Physical Health Status is a neglected outcome in clinical practice with Obsessive-Compulsive Disorder (OCD) and a systematic review is lacking.

Objective:

The current study presents the first systematic review and meta-analysis summarizing the evidence on (a) perceived Physical Health Status, Bodily Pain and Role Limitations due to Physical Problems in patients with OCD compared with controls, (b) age, gender, severity of OCD symptoms, study publication date, study methodological quality as moderators of perceived Physical Health Status.

Methods:

Case-control studies were included if they (a) compared OCD patients with healthy/general population participants as controls, and (b) used validated self-report instruments. Two reviewers searched electronic databases, contacted corresponding authors, and examined reference lists/conference proceedings/theses.

Results:

Fourteen studies were included. A large significant negative effect size without publication bias showed that controls reported higher perceived Physical Health Status than patients with OCD. Medium and small effect sizes favouring controls emerged for Role Limitations due to Physical Problems and Bodily Pain, respectively. Higher age, females percentage, and publication date were associated with larger effect sizes; higher OCD severity and methodological quality were associated with smaller effect sizes.

Conclusion:

Perceived Physical Health should be evaluated and addressed by clinicians during treatment, particularly with older, female and less severe patients. Lifestyle interventions might be implemented.

Obsessive-compulsive disorder

Obsessive-compulsive disorder (OCD) is a highly prevalent and chronic condition that is associated with substantial global disability. OCD is the key example of the 'obsessive-compulsive and related disorders', a group of conditions which are now classified together in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, and the International Classification of Diseases, 11th Revision, and which are often underdiagnosed and undertreated. In addition, OCD is an important example of a neuropsychiatric disorder in which rigorous research on phenomenology, psychobiology, pharmacotherapy and psychotherapy has contributed to better recognition, assessment and outcomes. Although OCD is a relatively homogenous disorder with similar symptom dimensions globally, individualized assessment of symptoms, the degree of insight, and the extent of comorbidity is needed. Several neurobiological mechanisms underlying OCD have been identified, including specific brain circuits that underpin OCD. In addition, laboratory models have demonstrated how cellular and molecular dysfunction underpins repetitive stereotyped behaviours, and the genetic architecture of OCD is increasingly understood. Effective treatments for OCD include serotonin reuptake inhibitors and cognitive-behavioural therapy, and neurosurgery for those with intractable symptoms. Integration of global mental health and translational neuroscience approaches could further advance knowledge on OCD and improve clinical outcomes.

Perceived physical health in obsessive-compulsive disorder: a protocol for a systematic review and meta-analysis

INTRODUCTION

Obsessive-compulsive disorder (OCD) is a mental health condition associated with severe impairment in a variety of quality of life domains, an increased physical health burden, and a higher risk of general medical conditions and mortality compared with the general population. While there is a large amount of literature on psychological quality of life, a systematic review of perceived physical health in OCD is lacking. A quantitative summary might suggest that policy makers also focus the evaluation on perceived physical health and develop new strategies also aimed at this outcome. The current paper presents a protocol for the first systematic review and meta-analysis aimed at summarising perceived physical health in OCD by specifically examining perceived physical health status, bodily pain and role limitations due to physical problems in patients with OCD compared with controls. The review will also investigate potential demographic and clinical moderators of perceived physical health status (age, gender, OCD severity, publication date, methodological quality).

METHODS AND ANALYSIS

A systematic review and meta-analysis will be conducted according to PRISMA guidelines. Studies will be included if using a clinical group with a current primary diagnosis of OCD established by international standardised criteria, if measuring perceived physical health status, and if using screened or community participants as controls. No publication date or language restriction will be applied. An online systematic search of electronic databases (Scopus, PubMed, PsycINFO, EMBASE, Cochrane Library), and examination of conference proceedings and theses/dissertations will be conducted by independent reviewers. Risk of bias will be assessed through the Newcastle-Ottawa Scale.

ETHICS AND DISSEMINATION

The current review does not require ethics approval. The results will be disseminated through publications in peer-reviewed journals.

PROSPERO REGISTRATION NUMBER

2018 CRD42018106194.

Mindfulness meditation for workplace wellness: An evidence map

BACKGROUND

Mindfulness interventions aim to foster greater attention and awareness of present moment experiences. Uptake of mindfulness programs in the workplace has grown as organizations look to support employee health, wellbeing, and performance.

OBJECTIVE

In support of evidence-based decision making in workplace contexts, we created an evidence map summarizing physical and mental health, cognitive, affective, and interpersonal outcomes from systematic reviews of randomized controlled trials (RCTs) of mindfulness interventions.

METHODS

We searched nine electronic databases to July 2017, dually-screened all reviews, and consulted topic experts to identify systematic reviews on mindfulness interventions. The distribution of evidence is presented as an evidence map in a bubble plot.

RESULTS

In total, 175 systematic reviews met inclusion criteria. Reviews included a variety of mindfulness-based interventions. The largest review included 109 randomized controlled trials. The majority of these addressed general health, psychological conditions, chronic illness, pain, and substance use. Twenty-six systematic reviews assessed studies conducted in workplace settings and with healthcare professionals, educators, and caregivers. The evidence map shows the prevalence of research by the primary area of focus. An outline of promising applications of mindfulness interventions is included.

CONCLUSIONS

The evidence map provides an overview of existing mindfulness research. It shows the body of available evidence to inform policy and organizational decision-making supporting employee wellbeing in work contexts.

Designing and validation of a yoga-based intervention for obsessive compulsive disorder

Some yoga-based practices have been found to be useful for patients with obsessive compulsive disorder (OCD). The authors could not find a validated yoga therapy module available for OCD. This study attempted to formulate a generic yoga-based intervention module for OCD. A yoga module was designed based on traditional and contemporary yoga literature. The module was sent to 10 yoga experts for content validation. The experts rated the usefulness of the practices on a scale of 1-5 (5 = extremely useful). The final version of the module was pilot-tested on patients with OCD (n = 17) for both feasibility and effect on symptoms. Eighty-eight per cent (22 out of 25) of the items in the initial module were retained, with modifications in the module as suggested by the experts along with patients' inputs and authors' experience. The module was found to be feasible and showed an improvement in symptoms of OCD on total Yale-Brown Obsessive-Compulsive Scale (YBOCS) score (p = 0.001). A generic yoga therapy module for OCD was validated by experts in the field and found feasible to practice in patients. A decrease in the symptom scores was also found following yoga practice of 2 weeks. Further clinical validation is warranted to confirm efficacy.

A systematic review and meta-analysis of self-help therapeutic interventions for obsessive-compulsive disorder: Is therapeutic contact key to overall improvement?

BACKGROUND AND OBJECTIVES

The presence of obsessive-compulsive disorder (OCD) can result in low quality of life, with significant impairments in social and occupational functioning. An increase in the dissemination of self-help programs has been observed in the treatment of OCD, and has provided improved accessibility to treatment. The present study examined the efficacy of self-help interventions for OCD in the context of therapeutic contact.

METHODS

Randomised controlled trials and quasi-experimental studies were identified through computerised database searches. Self-help format (bibliotherapy, internet-based, computerised), and therapeutic contact were examined for their effect on treatment outcomes.

RESULTS

Eighteen studies targeting self-help for OCD met inclusion criteria with 1570 participants. The average post-treatment effect size (Hedges' g) of self-help interventions on primary outcomes was .51 (95% CI: .41 to 0.61). Subgroup analysis revealed large effect sizes for minimal-contact self-help (g = 0.91, 95% CI: 0.66 to 1.17), moderate effect sizes for predominantly self-help (g = 0.68, 95% CI: 0.40 to 0.96), and small effect sizes for self-administered self-help (g = 0.33, 95% CI: .18 to 0.47).

LIMITATIONS

A large variation of treatment approaches, amount of therapeutic contact, and risk of bias within each study may account for the large magnitude in effect sizes across studies. Additionally, the long-term follow-up effects of treatment approaches were not examined.

CONCLUSIONS

A growing body of literature supporting to the use of self-help treatments for OCD is evident, however, further investigation through use of randomised controlled trials is required, particularly the use of stepped care and long-term effectiveness.

Clinical Feedback About Empirically Supported Treatments for Obsessive-Compulsive Disorder

Previous evidence for the treatment of obsessive-compulsive disorder (OCD) has been derived principally from randomized controlled trials. As such, evidence about the treatment of OCD has unilaterally flowed from researchers to clinicians. Despite often having decades of experience treating OCD, clinicians' feedback on their clinical observations in using these treatments has not been solicited. The current study contacted clinicians for their clinical observations on empirically supported treatments for OCD to identify commonly used cognitive-behavioral techniques and their limitations in their practices. One hundred eighty-one psychotherapists completed an online survey. The average participant practiced psychotherapy for 15 years, worked in private practice, held a doctorate, and treated an average of 25 clients with OCD in their lifetime. In regard to the most common techniques, behavioral strategies involving exposure to a feared outcome and prevention of a compulsive ritual were the most frequent group of interventions, followed by techniques that attempted to identify and challenge irrational thoughts. However, the majority of participants also reported incorporating mindfulness or acceptance-based methods. Based on therapists' reports, the most common barriers to the efficacy of cognitive-behavioral interventions included limited premorbid functioning, chaotic lifestyles, controlling and critical families, OCD symptom severity, OCD symptom chronicity, and comorbidities. This study provides insight into common practices and limitations in clinical practice to inform future clinically relevant treatment research.

A proprietary herbal medicine (5-Ling Granule) for Tourette syndrome: a randomized controlled trial

BACKGROUND

Tourette syndrome (TS) is a common tic disorder in children and adolescents. There is preliminary evidence that herbal medicine may possess the potential to treat tics. The purpose of this study was to formally evaluate the efficacy and safety of 5-Ling Granule (5-LGr), a proprietary polyherbal product, for the treatment of patients with TS in comparison with tiapride and placebo.

METHODS

In this multisite, double-blind, double-dummy, randomized, placebo-controlled trial, 603 patients with TS aged 5-18 years were randomly assigned to treatment with placebo (n = 117), tiapride (n = 123, 200-400 mg/day) or 5-LGr (n = 363, 15-22.5 g/day) for 8 weeks. The primary outcome was measured using the Yale Global Tic Severity Scale (YGTSS) and its subscales, total tic Score (TTS) and tic-related impairment. Incidence of adverse events was compared among the three groups.

RESULTS

While tics of all patients were reduced over time, 5-LGr and tiapride treatment produced significantly greater improvement on the YGTSS overall scale and subscale for TTS and impairment at endpoint than the placebo. Seventy-four percentage of patients in the 5-LGr arm and 68.3% in the tiapride arm had clinical response and these rates of response were significantly higher than those on placebo (44.0%, p < .001). The incidence of overall adverse events was significantly fewer for patients on placebo and 5-LGr compared to tiapride (11.2% and 13.8% vs. 26.0%, p = .002); in particular physical tiredness, dizziness and sleep disturbance.

CONCLUSIONS

The clinical efficacy of 5-LGr is comparable to tiapride in reducing tics. Its safety profile is better than tiapride. 5-LGr can be considered a safe and effective therapy for TS (Trial registration: www.clinicaltrials.gov: NCT01501695).

Music therapy as an adjunct to standard treatment for obsessive compulsive disorder and co-morbid anxiety and depression: A randomized clinical trial

BACKGROUND

Previous studies have highlighted the potential therapeutic benefits of music therapy as an adjunct to standard care, in a variety of psychiatric ailments including mood and anxiety disorders. However, the role of music in the treatment of obsessive-compulsive disorder (OCD) have not been investigated to date.

METHODS

In a single-center, parallel-group, randomized clinical trial (NCT02314195) 30 patients with OCD were randomly assigned to standard treatment (pharmacotherapy and cognitive-behavior therapy) plus 12 sessions of individual music therapy (n = 15) or standard treatment only (n = 15) for one month. Maudsley Obsessive-Compulsive Inventory, Beck Anxiety Inventory, and Beck Depression Inventory-Short Form were administered baseline and after one month.

RESULTS

Thirty patients completed the study. Music therapy resulted in a greater decrease in total obsessive score (post-intervention score: music therapy+standard treatment: 12.4 ± 1.9 vs standard treatment only: 15.1 ± 1.7, p < 0.001, effect size = 56.7%). For subtypes, significant between-group differences were identified for checking (p = 0.004), and slowness (p = 0.019), but not for washing or responsibility. Music therapy was significantly more effective in reducing anxiety (post-intervention score: music therapy + standard treatment: 16.9 ± 7.4 vs standard treatment only: 22.9 ± 4.6, p < 0.001, effect size = 47.0%), and depressive symptoms (post-intervention score: music therapy + standard treatment: 10.8 ± 3.8 vs standard treatment: 17.1 ± 3.7, p < 0.001, effect size = 47.0%).

LIMITATIONS

Inclusion of a small sample size, lack of blinding due to the nature of the intervention, short duration of follow-up.

CONCLUSION

In patients with OCD, music therapy, as an adjunct to standard care, seems to be effective in reducing obsessions, as well as co-morbid anxiety and depressive symptoms.

Mindfulness and relaxation treatment reduce depressive symptoms in individuals with psychosis

Introduction

Self-help is increasingly accepted for the treatment of mental disorders, including psychosis, as both a provisional first step and a way to bridge the large treatment gap. Though mindfulness-based interventions do not belong to first line treatment strategies in psychosis and randomized controlled trials are lacking, encouraging preliminary findings speak for the usefulness of this approach. For the present study, we examined whether patients with psychosis benefit from mindfulness bibliotherapy.

Methods

A sample of 90 patients with psychosis (including a subsample with a verified diagnosis of schizophrenia) took part in the study via the Internet. Following baseline assessment, participants were randomized to either a mindfulness group or a Progressive Muscle Relaxation (PMR) control group and received the respective self-help manual including accompanying audio files. Symptom change was measured six weeks after the baseline assessment with self-rating scales including the Paranoia Checklist. The retention rate was 71%. The quality of the online dataset was confirmed by various strategies (e.g., psychosis lie scale; examination of response biases). The trial was registered at the ISRCTN registry (ISRCTN86762253).

Results

No changes across time or between groups were noted for the Paranoia Checklist. Both conditions showed a decline in depressive and obsessive-compulsive symptoms at a medium effect size (per protocol and intention to treat analyses).

Discussion/conclusion

The study provided partial support for the effectiveness of self-help mindfulness and PMR for depression in psychosis. Whether mindfulness delivered by a licensed therapist might lead to improved treatment adherence and a superior outcome relative to PMR remains to be established. The results underscore that bibliotherapy is a worthwhile approach to narrow the large treatment gap seen in psychosis.

Decreased thalamic glutamate level in unmedicated adult obsessive-compulsive disorder patients detected by proton magnetic resonance spectroscopy

BACKGROUND

Previous neuroimaging studies implied that the dysfunction of cortico-striato-thalamo-cortical (CSTC) circuit served as the neural basis for the pathophysiology of obsessive-compulsive disorder (OCD). The imbalances in neuronal metabolite and neurotransmitter within CSTC circuit have been shown as the leading reasons of the OCD onset. The aim of this study is to investigate the metabolic alterations, especially the glutamatergic signal dysfunction within CSTC circuit, and the relationships between neural metabolites and the symptom severity of OCD patients.

METHODS

Single voxel magnetic resonance spectroscopy (MRS) was conducted in medial prefrontal cortex (mPFC) and bilateral thalamus areas for thirteen unmedicated adult OCD patients with age-, gender-, and education-matched healthy controls. Quantification and multivariate analysis were performed to identify vital metabolic biomarkers for patients and healthy controls group differentiation. Moreover, we performed Spearman׳s rank correlation analysis for OCD patients to examine the relationship between the metabolite concentration level and OCD symptomatology.

RESULTS

Patients with OCD showed significantly decreased glutamate level in mPFC (p=0.021) and right thalamus (p=0.039), and significantly increased choline compounds in left thalamus (p=0.044).The glutamate in right thalamus was shown as the most important metabolite for group separation from multivariate analysis (Q(2)=0.134) and was significantly correlated with the patients׳ compulsion scores (Spearman r=-0.674, p=0.016).

LIMITATIONS

Limited sample size, the use of creatine and phosphocreatine (Cr) ratios rather than absolute concentrations and unresolved glutamine (Gln) are limitations of the present study.

CONCLUSION

Our study results consolidated the hypothesis about glutamatergic signaling dysfunction in OCD. To our knowledge, it is the first finding about a reduced thalamic glutamate level in adult unmedicated OCD patients. The dysregulation of glutamate serves as a potential target for the OCD pharmacotherapy and the detailed mechanisms underlying the glutamate alterations within CSTC circuits merit further investigations.

N-acetyl cysteine in the treatment of obsessive compulsive and related disorders: a systematic review

OBJECTIVE

Obsessive compulsive and related disorders are a collection of debilitating psychiatric disorders in which the role of glutamate dysfunction in the underpinning neurobiology is becoming well established. N-acetyl cysteine (NAC) is a glutamate modulator with promising therapeutic effect. This paper presents a systematic review of clinical trials and case reports exploring the use of NAC for these disorders. A further objective was to detail the methodology of current clinical trials being conducted in the area.

METHODS

PubMed, Web of Science and Cochrane Library Database were searched for human clinical trials or case reports investigating NAC in the treatment of obsessive compulsive disorder (OCD) or obsessive compulsive related disorders. Researchers with known involvement in NAC studies were contacted for any unpublished data.

RESULTS

Four clinical trials and five case reports/series were identified. Study durations were commonly 12-weeks, using 2,400-3,000 mg/day of NAC. Overall, NAC demonstrates activity in reducing the severity of symptoms, with a good tolerability profile and minimal adverse effects. Currently there are three ongoing randomized controlled trials using NAC for OCD (two adults and one pediatric), and one for excoriation.

CONCLUSIONS

Encouraging results have been demonstrated from the few pilot studies that have been conducted. These results are detailed, in addition to a discussion of future potential research.

Pharmacological treatment of obsessive-compulsive disorder

Obsessive-compulsive disorder (OCD) affects up to 2.5% of the population of the course of a lifetime and produces substantial morbidity. Approximately 70% of patients can experience significant symptomatic relief with appropriate pharmacotherapy. Selective serotonin reuptake inhibitors are the mainstay of pharmacological treatment. These drugs are typically used at higher doses and for longer periods than in depression. Proven second-line treatments include the tricyclic clomipramine and the addition of low-dose neuroleptic medications. OCD refractory to available treatments remains a profound clinical challenge.

Adverse childhood experiences and gender influence treatment seeking behaviors in obsessive-compulsive disorder

BACKGROUND

Exposure to adverse childhood experiences (ACE) increases the risk of adult physical and mental health disorders, including obsessive-compulsive disorder (OCD), and influences adult brain structure and function. ACE could influence the use of psychotropic drugs in adulthood, and treatment seeking behaviors.

METHODS

We assessed the severity of ACE in a sample of 31 healthy controls and 66 patients with OCD who were consecutively referred for hospitalization and were either drug-naïve or drug-treated. In addition, we explored the possible clinical relevance of ACE with two additional analyses: (a) a discriminant function analysis with sex and ACE as factors, and (b) a logistic regression with use of medication as dependent variable and ACE as factor.

RESULTS

Despite comparable age, years at school, age at onset of illness, duration of illness, and severity of illness (Y-BOCS), adult drug-naïve patients reported lower exposure to ACE and later contacts with mental health professionals than drug-treated. This effect was particularly evident in female patients compared to males.

CONCLUSIONS

The interaction of gender with factors linked with the early familial environment biased access to psychiatric care and use of medication, independent of OCD-associated factors such as severity of symptoms or duration of illness. The need for medications of patients could be higher in families where OCD symptomatology is associated with ACE.