Visual Snow Syndrome Improves With Modulation of Resting-State Functional MRI Connectivity After Mindfulness-Based Cognitive Therapy: An Open-Label Feasibility Study

BACKGROUND

Visual snow syndrome (VSS) is associated with functional connectivity (FC) dysregulation of visual networks (VNs). We hypothesized that mindfulness-based cognitive therapy, customized for visual symptoms (MBCT-vision), can treat VSS and modulate dysfunctional VNs.

METHODS

An open-label feasibility study for an 8-week MBCT-vision treatment program was conducted. Primary (symptom severity; impact on daily life) and secondary (WHO-5; CORE-10) outcomes at Week 9 and Week 20 were compared with baseline. Secondary MRI outcomes in a subcohort compared resting-state functional and diffusion MRI between baseline and Week 20.

RESULTS

Twenty-one participants (14 male participants, median 30 years, range 22-56 years) recruited from January 2020 to October 2021. Two (9.5%) dropped out. Self-rated symptom severity (0-10) improved: baseline (median [interquartile range (IQR)] 7 [6-8]) vs Week 9 (5.5 [3-7], P = 0.015) and Week 20 (4 [3-6], P < 0.001), respectively. Self-rated impact of symptoms on daily life (0-10) improved: baseline (6 [5-8]) vs Week 9 (4 [2-5], P = 0.003) and Week 20 (2 [1-3], P < 0.001), respectively. WHO-5 Wellbeing (0-100) improved: baseline (median [IQR] 52 [36-56]) vs Week 9 (median 64 [47-80], P = 0.001) and Week 20 (68 [48-76], P < 0.001), respectively. CORE-10 Distress (0-40) improved: baseline (15 [12-20]) vs Week 9 (12.5 [11-16.5], P = 0.003) and Week 20 (11 [10-14], P = 0.003), respectively. Within-subject fMRI analysis found reductions between baseline and Week 20, within VN-related FC in the i) left lateral occipital cortex (size = 82 mL, familywise error [FWE]-corrected P value = 0.006) and ii) left cerebellar lobules VIIb/VIII (size = 65 mL, FWE-corrected P value = 0.02), and increases within VN-related FC in the precuneus/posterior cingulate cortex (size = 69 mL, cluster-level FWE-corrected P value = 0.02).

CONCLUSIONS

MBCT-vision was a feasible treatment for VSS, improved symptoms and modulated FC of VNs. This study also showed proof-of-concept for intensive mindfulness interventions in the treatment of neurological conditions.

Trajectories of depression and anxiety symptom severity during psychological therapy for common mental health problems

BACKGROUND

There is substantial variation in patient symptoms following psychological therapy for depression and anxiety. However, reliance on endpoint outcomes ignores additional interindividual variation during therapy. Knowing a patient's likely symptom trajectories could guide clinical decisions. We aimed to identify latent classes of patients with similar symptom trajectories over the course of psychological therapy and explore associations between baseline variables and trajectory class.

METHODS

Patients received high-intensity psychological treatment for common mental health problems at National Health Service Improving Access to Psychological Therapies services in South London (N = 16 258). To identify trajectories, we performed growth mixture modelling of depression and anxiety symptoms over 11 sessions. We then ran multinomial regressions to identify baseline variables associated with trajectory class membership.

RESULTS

Trajectories of depression and anxiety symptoms were highly similar and best modelled by four classes. Three classes started with moderate-severe symptoms and showed (1) no change, (2) gradual improvement, and (3) fast improvement. A final class (4) showed initially mild symptoms and minimal improvement. Within the moderate-severe baseline symptom classes, patients in the two showing improvement as opposed to no change tended not to be prescribed psychotropic medication or report a disability and were in employment. Patients showing fast improvement additionally reported lower baseline functional impairment on average.

CONCLUSIONS

Multiple trajectory classes of depression and anxiety symptoms were associated with baseline characteristics. Identifying the most likely trajectory for a patient at the start of treatment could inform decisions about the suitability and continuation of therapy, ultimately improving patient outcomes.

Patient characteristics associated with retrospectively self-reported treatment outcomes following psychological therapy for anxiety or depressive disorders - a cohort of GLAD study participants

BACKGROUND

Progress towards stratified care for anxiety and depression will require the identification of new predictors. We collected data on retrospectively self-reported therapeutic outcomes in adults who received psychological therapy in the UK in the past ten years. We aimed to replicate factors associated with traditional treatment outcome measures from the literature.

METHODS

Participants were from the Genetic Links to Anxiety and Depression (GLAD) Study, a UK-based volunteer cohort study. We investigated associations between retrospectively self-reported outcomes following therapy, on a five-point scale (global rating of change; GRC) and a range of sociodemographic, clinical and therapy-related factors, using ordinal logistic regression models (n = 2890).

RESULTS

Four factors were associated with therapy outcomes (adjusted odds ratios, OR). One sociodemographic factor, having university-level education, was associated with favourable outcomes (OR = 1.37, 95%CI: 1.18, 1.59). Two clinical factors, greater number of reported episodes of illness (OR = 0.95, 95%CI: 0.92, 0.97) and higher levels of personality disorder symptoms (OR = 0.89, 95%CI: 0.87, 0.91), were associated with less favourable outcomes. Finally, reported regular use of additional therapeutic activities was associated with favourable outcomes (OR = 1.39, 95%CI: 1.19, 1.63). There were no statistically significant differences between fully adjusted multivariable and unadjusted univariable odds ratios.

CONCLUSION

Therapy outcome data can be collected quickly and inexpensively using retrospectively self-reported measures in large observational cohorts. Retrospectively self-reported therapy outcomes were associated with four factors previously reported in the literature. Similar data collected in larger observational cohorts may enable detection of novel associations with therapy outcomes, to generate new hypotheses, which can be followed up in prospective studies.

Effects of a mindfulness-based versus a health self-management intervention on objective cognitive performance in older adults with subjective cognitive decline (SCD): a secondary analysis of the SCD-Well randomized controlled trial

Background

Older individuals with subjective cognitive decline (SCD) perceive that their cognition has declined but do not show objective impairment on neuropsychological tests. Individuals with SCD are at elevated risk of objective cognitive decline and incident dementia. Non-pharmacological interventions (including mindfulness-based and health self-management approaches) are a potential strategy to maintain or improve cognition in SCD, which may ultimately reduce dementia risk.

Methods

This study utilized data from the SCD-Well randomized controlled trial. One hundred forty-seven older adults with SCD (MAge = 72.7 years; 64% female) were recruited from memory clinics in four European countries and randomized to one of two group-based, 8-week interventions: a Caring Mindfulness-based Approach for Seniors (CMBAS) or a health self-management program (HSMP). Participants were assessed at baseline, post-intervention (week 8), and at 6-month follow-up (week 24) using a range of cognitive tests. From these tests, three composites were derived—an “abridged” Preclinical Alzheimer’s Cognitive Composite 5 (PACC5Abridged), an attention composite, and an executive function composite. Both per-protocol and intention-to-treat analyses were performed. Linear mixed models evaluated the change in outcomes between and within arms and adjusted for covariates and cognitive retest effects. Sensitivity models repeated the per-protocol analyses for participants who attended ≥ 4 intervention sessions.

Results

Across all cognitive composites, there were no significant time-by-trial arm interactions and no measurable cognitive retest effects; sensitivity analyses supported these results. Improvements, however, were observed within both trial arms on the PACC5Abridged from baseline to follow-up (Δ [95% confidence interval]: CMBAS = 0.34 [0.19, 0.48]; HSMP = 0.30 [0.15, 0.44]). There was weaker evidence of an improvement in attention but no effects on executive function.

Conclusions

Two non-pharmacological interventions conferred small, non-differing improvements to a global cognitive composite sensitive to amyloid-beta-related decline. There was weaker evidence of an effect on attention, and no evidence of an effect on executive function. Importantly, observed improvements were maintained beyond the end of the interventions. Improving cognition is an important step toward dementia prevention, and future research is needed to delineate the mechanisms of action of these interventions and to utilize clinical endpoints (i.e., progression to mild cognitive impairment or dementia).

Trial registration

ClinicalTrials.gov, NCT03005652.

The Genetic Links to Anxiety and Depression (GLAD) Study: Online recruitment into the largest recontactable study of depression and anxiety

BACKGROUND

Anxiety and depression are common, debilitating and costly. These disorders are influenced by multiple risk factors, from genes to psychological vulnerabilities and environmental stressors, but research is hampered by a lack of sufficiently large comprehensive studies. We are recruiting 40,000 individuals with lifetime depression or anxiety and broad assessment of risks to facilitate future research.

METHODS

The Genetic Links to Anxiety and Depression (GLAD) Study (www.gladstudy.org.uk) recruits individuals with depression or anxiety into the NIHR Mental Health BioResource. Participants invited to join the study (via media campaigns) provide demographic, environmental and genetic data, and consent for medical record linkage and recontact.

RESULTS

Online recruitment was effective; 42,531 participants consented and 27,776 completed the questionnaire by end of July 2019. Participants' questionnaire data identified very high rates of recurrent depression, severe anxiety, and comorbidity. Participants reported high rates of treatment receipt. The age profile of the sample is biased toward young adults, with higher recruitment of females and the more educated, especially at younger ages.

DISCUSSION

This paper describes the study methodology and descriptive data for GLAD, which represents a large, recontactable resource that will enable future research into risks, outcomes, and treatment for anxiety and depression.

Sexual orientation differences in psychological treatment outcomes for depression and anxiety: National cohort study

OBJECTIVE

This study investigates whether sexual minority patients have poorer treatment outcomes than heterosexual patients in England's Improving Access to Psychological Therapies (IAPT) services. These services provide evidence-based psychological interventions for people with depression or anxiety.

METHOD

National routinely collected data were analyzed for a cohort who had attended at least 2 treatment sessions and were discharged between April 2013-March, 2015. Depression, anxiety and functional impairment were compared for 85,831 women (83,482 [97.2%] heterosexual; 1,285 [1.5%] lesbian; 1,064 [1.2%] bisexual) and 47,092 men (44,969 [95.5%] heterosexual; 1,734 [3.7%] gay; 389 [0.8%] bisexual). Linear and logistic models were fitted adjusting for baseline scores, and sociodemographic and treatment characteristics.

RESULTS

Compared to heterosexual women, lesbian and bisexual women had higher final-session severity for depression, anxiety, and functional impairment and increased risk of not attaining reliable recovery in depression/anxiety or functioning (aORs 1.3-1.4) and reliable improvement in depression/anxiety or functioning (aORs 1.2-1.3). Compared to heterosexual and gay men, bisexual men had higher final-session severity for depression, anxiety, and functioning and increased risk of not attaining reliable recovery for depression/anxiety or functioning (aORs 1.5-1.7) and reliable improvement in depression/anxiety or functioning (aORs 1.3-1.4). Gay and heterosexual men did not differ on treatment outcomes. Racial minority lesbian/gay or bisexual patients did not have significantly different outcomes to their White lesbian/gay or bisexual counterparts.

CONCLUSIONS

The reasons for treatment outcome inequities for bisexual patients and lesbian women (e.g., 30-70% increased risk of not recovering) need investigation. Health services should address these inequalities. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Time-intensive behavioural activation for depression: A multiple baseline study

BACKGROUND AND OBJECTIVES

Depression is the second leading cause of disability, worldwide, and increasing access to its effective/preferred treatment requires more attention. Behavioural activation and time-intensive treatment delivery both show promise in this regard, yet research into their combination is limited. This study aimed to investigate the feasibility, effectiveness, and acceptability of time-intensive behavioural activation (BA) for depression METHODS: Eight adults with major depressive disorder were recruited from three outpatient IAPT services in London. The study employed a single case experimental design with multiple baselines. All participants completed time-intensive BA, consisting of up to seven twice weekly sessions with daily prompting in-between and three optional booster sessions. Idiographic, standardised and process measures of depression symptomatology were collected.

RESULTS

Treatment recruitment and retention indicated that the intervention was feasible. Visual and statistical analyses showed that relative to baseline, 6 out of 8 participants made significant improvements in all idiographic symptoms of depression following the intervention. According to standardised measures of depression, four out of eight participants were considered treatment responders. Five participants completed follow-up measures and the majority of progress was maintained after the withdrawal of the intervention. The intervention was also considered highly acceptable by participants and therapists.

LIMITATIONS

Conclusions cannot be drawn about the generalizability or the long-term durability of the findings CONCLUSIONS: Overall this study provides new, but tentative evidence highlighting the potential of time-intensive BA as a feasible, effective and acceptable treatment for some adult outpatients with depression. The findings now warrant further, more rigorous evaluation of the treatment.

Clinical characteristics of patients assessed within an Improving Access to Psychological Therapies (IAPT) service: results from a naturalistic cohort study (Predicting Outcome Following Psychological Therapy; PROMPT)

BACKGROUND

A substantial number of patients do not benefit from first line psychological therapies for the treatment of depression and anxiety. Currently, there are no clear predictors of treatment outcomes for these patients. The PROMPT project aims to establish an infrastructure platform for the identification of factors that predict outcomes following psychological treatment for depression and anxiety. Here we report on the first year of recruitment and describe the characteristics of our sample to date.

METHODS

One hundred and forty-seven patients awaiting treatment within an Improving Access to Psychological Therapies (IAPT) service were recruited between February 2014 and February 2015 (representing 48 % of those eligible). Baseline assessments were conducted to collect information on a variety of clinical, psychological and social variables including a diagnostic interview using the Mini International Neuropsychiatric Interview (MINI).

RESULTS

Our initial findings showed that over a third of our sample were not presenting to IAPT services for the first time, and 63 % had been allocated to receive higher intensity IAPT treatments. Approximately half (46 %) were taking prescribed psychotropic medication (most frequently antidepressants). Co-morbidity was common: 72 % of the sample met criteria for 2 or more current MINI diagnoses. Our initial data also indicated that 16 % met criteria for borderline personality disorder and 69 % were at high risk of personality disorder. Sixty-one percent scored above the screening threshold for bipolarity. Over half of participants (55 %) reported experiencing at least one stressful life event in the previous 12 months, whilst 67 % reported experiencing at least one form of childhood trauma.

CONCLUSIONS

Our results to date highlight the complex nature of patients seen within an urban IAPT service, with high rates of psychiatric comorbidity, personality disorder, bipolarity and childhood trauma. Whilst there are significant challenges associated with researching IAPT populations, we have also confirmed the feasibility of undertaking such research.

The impact of comorbid personality difficulties on response to IAPT treatment for depression and anxiety

The UK's Improving Access to Psychological Therapies (IAPT) initiative provides evidence-based psychological interventions for mild to moderate common mental health problems in a primary care setting. Predictors of treatment response are unclear. This study examined the impact of personality disorder status on outcome in a large IAPT service. We hypothesised that the presence of probable personality disorder would adversely affect treatment response.

METHOD

We used a prospective cohort design to study a consecutive sample of individuals (n = 1249).

RESULTS

Higher scores on a screening measure for personality disorder were associated with poorer outcome on measures of depression, anxiety and social functioning, and reduced recovery rates at the end of treatment. These associations were not confounded by demographic status, initial symptom severity nor number of treatment sessions. The presence of personality difficulties independently predicted reduced absolute change on all outcome measures.

CONCLUSIONS

The presence of co-morbid personality difficulties adversely affects treatment outcome among individuals attending for treatment in an IAPT service. There is a need to routinely assess for the presence of personality difficulties on all individuals referred to IAPT services. This information will provide important prognostic data and could lead to the provision of more effective, personalised treatment in IAPT.

Predicting outcome following psychological therapy in IAPT (PROMPT): a naturalistic project protocol

BACKGROUND

Depression and anxiety are highly prevalent and represent a significant and well described public health burden. Whilst first line psychological treatments are effective for nearly half of attenders, there remain a substantial number of patients who do not benefit. The main objective of the present project is to establish an infrastructure platform for the identification of factors that predict lack of response to psychological treatment for depression and anxiety, in order to better target treatments as well as to support translational and experimental medicine research in mood and anxiety disorders.

METHODS/DESIGN

Predicting outcome following psychological therapy in IAPT (PROMPT) is a naturalistic observational project that began patient recruitment in January 2014. The project is currently taking place in Southwark Psychological Therapies Service, an Improving Access to Psychological Therapies (IAPT) service currently provided by the South London and Maudsley NHS Foundation Trust (SLaM). However, the aim is to roll-out the project across other IAPT services. Participants are approached before beginning treatment and offered a baseline interview whilst they are waiting for therapy to begin. This allows us to test for relationships between predictor variables and patient outcome measures. At the baseline interview, participants complete a diagnostic interview; are asked to give blood and hair samples for relevant biomarkers, and complete psychological and social questionnaire measures. Participants then complete their psychological therapy as offered by Southwark Psychological Therapies Service. Response to psychological therapy will be measured using standard IAPT outcome data, which are routinely collected at each appointment.

DISCUSSION

This project addresses a need to understand treatment response rates in primary care psychological therapy services for those with depression and/or anxiety. Measurement of a range of predictor variables allows for the detection of bio-psycho-social factors which may be relevant for treatment outcome. This will enable future clinical decision making to be based on the individual needs of the patient in an evidence-based manner. Moreover, the identification of individuals who fail to improve following therapy delivered by IAPT services could be utilised for the development of novel interventions.

How equitable are psychological therapy services in South East London now? A comparison of referrals to a new psychological therapy service with participants in a psychiatric morbidity survey in the same London borough

PURPOSE

Psychological therapy services are sometimes characterised as being small and inequitable, with an over-representation of white middle class women. The 'Improving Access to Psychological Therapies (IAPT)' initiative is a programme in England that attempts to make evidence-based therapies accessible to more people more equitably. The aim of this study is to assess whether an IAPT service is delivering an equitable service a London borough. Patients using services at the Southwark IAPT service (n = 4,781) were compared with a sub-group of participants in the South East London Community Health study (SELCOH) with diagnosable mental health problems and who were also resident in Southwark (n = 196).

METHODS

We compared Southwark IAPT patients and SELCOH participants on equity criteria of age, gender, ethnicity, occupational status and benefits status. To investigate if referral pathways influenced equity, patients referred by their general practitioner (GP pathway) (n = 3,738) or who self-referred (self-referral pathway) (n = 482) were compared with SELCOH participants.

RESULTS

Southwark IAPT patients significantly differed from SELCOH participants on all our equity criteria and similar differences were found with GP pathway patients. However, self-referrals did not differ from the SELCOH group on age, gender, ethnicity and benefit status.

CONCLUSIONS

When compared to a community sample with diagnosable mental disorders, health disparities were found with the overall Southwark IAPT service and with GP pathway patients. Although unemployed people did access IAPT, fewer disparities were found with the self-referral pathway patients, suggesting that the IAPT self-referral pathway may be important in reducing inequitable access to services.

Mindfulness-based cognitive therapy for people with chronic fatigue syndrome still experiencing excessive fatigue after cognitive behaviour therapy: a pilot randomized study

Cognitive behaviour therapy (CBT) is an effective treatment for chronic fatigue syndrome (CFS; sometimes known as myalgic encephalomyelitis). However, only a minority of patients fully recover after CBT; thus, methods for improving treatment outcomes are required. This pilot study concerned a mindfulness-based cognitive therapy (MBCT) intervention adapted for people with CFS who were still experiencing excessive fatigue after CBT. The study aimed to investigate the acceptability of this new intervention and the feasibility of conducting a larger-scale randomized trial in the future. Preliminary efficacy analyses were also undertaken. Participants were randomly allocated to MBCT or waiting list. Sixteen MBCT participants and 19 waiting-list participants completed the study, with the intervention being delivered in two separate groups. Acceptability, engagement and participant-rated helpfulness of the intervention were high. Analysis of covariance controlling for pre-treatment scores indicated that, at post-treatment, MBCT participants reported lower levels of fatigue (the primary clinical outcome) than the waiting-list group. Similarly, there were significant group differences in fatigue at 2-month follow-up, and when the MBCT group was followed up to 6 months post-treatment, these improvements were maintained. The MBCT group also had superior outcomes on measures of impairment, depressed mood, catastrophic thinking about fatigue, all-or-nothing behavioural responses, unhelpful beliefs about emotions, mindfulness and self-compassion. In conclusion, MBCT is a promising and acceptable additional intervention for people still experiencing excessive fatigue after CBT for CFS, which should be investigated in a larger randomized controlled trial.

KEY PRACTITIONER MESSAGE

Only about 30% of people with chronic fatigue syndrome (CFS) recover after cognitive behaviour therapy (CBT); thus, methods for improving treatment outcomes are needed. This is the first pilot randomized study to demonstrate that a mindfulness-based intervention was associated with reduced fatigue and other benefits for people with CFS who were still experiencing excessive fatigue after a course of CBT. Levels of acceptability, engagement in the intervention and rated helpfulness were high. A larger-scale randomized controlled trial is required.

Rumination-focused cognitive-behavioural therapy for residual depression: phase II randomised controlled trial

BACKGROUND

About 20% of major depressive episodes become chronic and medication-refractory and also appear to be less responsive to standard cognitive-behavioural therapy (CBT).

AIMS

To test whether CBT developed from behavioural activation principles that explicitly and exclusively targets depressive rumination enhances treatment as usual (TAU) in reducing residual depression.

METHOD

Forty-two consecutively recruited participants meeting criteria for medication-refractory residual depression were randomly allocated to TAU v. TAU plus up to 12 sessions of individual rumination-focused CBT. The trial has been registered (ISRCTN22782150).

RESULTS

Adding rumination-focused CBT to TAU significantly improved residual symptoms and remission rates. Treatment effects were mediated by change in rumination.

CONCLUSIONS

This is the first randomised controlled trial providing evidence of benefits of rumination-focused CBT in persistent depression. Although suggesting the internal validity of rumination-focused CBT for residual depression, the trial lacked an attentional control group so cannot test whether the effects were as a result of the specific content of rumination-focused CBT v. non-specific therapy effects.

Rumination-focused cognitive behaviour therapy for residual depression: A case series

The treatment of chronic and recurrent depression is a priority for the development of new interventions. The maintenance of residual symptoms following acute treatment for depression is a risk factor for both chronic depression and further relapse/recurrence. This open case series provides the first data on a cognitive-behavioural treatment for residual depression that explicitly targets depressive rumination. Rumination has been identified as a key factor in the onset and maintenance of depression, which is found to remain elevated following remission from depression. Fourteen consecutively recruited participants meeting criteria for medication--refractory residual depression [Paykel, E.S., Scott, J., Teasdale, J.D., Johnson, A.L., Garland, A., Moore, R. et al., 1999. Prevention of relapse in residual depression by cognitive therapy--a controlled trial. Archives of General Psychiatry 56, 829-835] were treated individually for up to 12 weekly 60-min sessions. Treatment specifically focused on switching patients from less helpful to more helpful styles of thinking through the use of functional analysis, experiential/imagery exercises and behavioural experiments. Treatment produced significant improvements in depressive symptoms, rumination and co-morbid disorders: 71% responded (50% reduction on Hamilton Depression Rating Scale) and 50% achieved full remission. Treating depressive rumination appears to yield generalised improvement in depression and co-morbidity. This study provides preliminary evidence that rumination-focused CBT may be an efficacious treatment for medication--refractory residual depression.

Angry cognitive bias, trait aggression and impulsivity in substance users

RATIONALE

According to cognitive theory, people who are aggressive expect angry responses to ambiguous situations. Increased aggression has been reported a few days or weeks following use of MDMA (ecstasy). This may relate to low 5-HT release, and so a 5-HT challenge may increase cognitive bias towards anger differentially in MDMA users and non-users.

OBJECTIVES

To investigate whether: (1) measures of anger and aggression will correlate with processing time of angry material and with generation of aggressive responses and (2) tryptophan challenge in people abstinent from MDMA and controls will affect angry cognitive bias.

METHODS

Thirty-two current MDMA users abstinent for 3 weeks, 32 ex-users abstinent for longer than 1 year and 32 non-MDMA substance users were recruited. Trait measures were administered before and state measures before and 5 h after an amino acid drink, depleted or augmented with tryptophan. After the drink, subjects undertook a computer task, which involved reading ambiguous short stories. Reading times to a key sentence describing an angry or non-angry reaction were recorded and subjects wrote a continuing sentence for half the stories.

RESULTS

Subjects were faster to process angry than non-angry reactions, indicating the presence of angry cognitive bias. Trait anger and aggression were correlated with processing time of angry relative to non-angry reactions, particularly in the current users. Impulsivity was correlated with non-specific speed of response. Subjects wrote more aggressive sentences after an angry reaction. Tryptophan depletion tended to increase aggressive content. Trait aggression was correlated with aggressive content following non-angry reactions.

CONCLUSIONS

Evidence of angry cognitive bias was shown in this group of substance users, which was not specific to MDMA use. People high on trait aggression were more likely to expect an angry reaction to an ambiguous situation and to generate more written aggression when this did not occur.

Buspirone decreases physiological reactivity to unconditioned and conditioned aversive stimuli

RATIONALE

Serotonergic pathways are thought to be important in mediating the effects of aversive events.

OBJECTIVE

To investigate the effects of buspirone, a 5-HT(1A) partial agonist, on habituation and extinction in an aversive classical conditioning model.

METHODS

Forty healthy male volunteers were randomly assigned to a single dose of buspirone (10 mg) or placebo. They filled in questionnaires of anxiety and depression at baseline and visual analogue scales of tension and anxiety before and at 60, 120 and 150 min after drug administration. Their skin conductance responses to auditory stimuli were measured on the conditioning model 2 h after drug intake.

RESULTS

There were no differences between groups on depression or anxiety. Buspirone decreased the amplitude of the skin conductance response and the number of spontaneous fluctuations in both the habituation and extinction phases but had no effect on skin conductance level. Buspirone also attenuated the unconditioned response to the white noise and the response to the first tone. Visual analogue ratings of tension and anxiety decreased after buspirone.

CONCLUSIONS

Buspirone decreased physiological reactivity in an aversive classical conditioning model. It had anxiolytic effects on both conditioned and unconditioned anxiety. This might be due to its multiple actions on 5-HT receptors.

Treatment of generalised anxiety disorder with a short course of psychological therapy, combined with buspirone or placebo

BACKGROUND

Very few studies have examined the combination of drug and psychological treatment in generalised anxiety disorder (GAD). Theoretically, buspirone should be a useful drug to combine with a learning-based therapy.

METHODS

Sixty patients with GAD were randomly assigned to treatment with buspirone or placebo, combined with anxiety management training or non-directive therapy for a period of 8 weeks.

RESULTS

Forty-four patients with a mean Hamilton Anxiety Scale score of 28 completed treatment. There were no significant differences between treatment groups. All groups showed significant improvement after 8 weeks compared to baseline. There were no baseline differences between those who completed the trial and those who did not but patients given buspirone were more likely to drop out.

CONCLUSIONS

A short course of psychological therapy, whether or not accompanied by active medication, was an effective treatment for patients diagnosed as having quite severe symptoms of GAD. CLINICAL IMPLICATIONS AND LIMITATIONS: Dropouts led to a sample size which may have been too small to detect group differences. Cognitive therapy may have been more effective.

Women with premenstrual dysphoric disorder do not recall aberrant parenting

Premenstrual dysphoric disorder (PMDD) is related to the affective disorders and thus is expected to share similar psychological risk factors. Depressed subjects have been found to recall lack of warmth and parental overcontrol in childhood as assessed by the Parental Bonding Instrument (PBI). The present study aimed to find out if such risk factors contributed to the development of PMDD in adulthood. Thirty-four women from South London who fulfilled rigorous criteria for PMDD and 22 controls were assessed for symptom severity, and each subject completed the PBI. All the women included in the study were free from other concurrent psychiatric disorders. Subjects with PMDD and controls had similar scores for warmth and parental overcontrol on the PBI and therefore had not been subject to more affectionless control. The PBI retained expected internal characteristics such as the inverse relationship of warmth and control scores. The findings indicate that recollection of parenting problems in childhood is not a major risk factor for subsequent development of PMDD in these women. A potential explanation for this is that PMDD is more biologically than psychosocially determined.

Mood disorder history and personality assessment in premenstrual dysphoric disorder

BACKGROUND

Menstrually related dysphoria is known to be associated with other affective disorders, notably major depressive disorder and puerperal depression. The relationship between premenstrual dysphoric disorder (PMDD) and maladaptive personality disorders and traits, however, is less established, at least in part because of the methodological and nosologic difficulties in the diagnosis of both PMDD and personality disorders. This study seeks to address this problem to elucidate the relationship between PMDD, other affective disturbances commonly experienced by women, and maladaptive personality.

METHOD

Axis I and II disorders were examined using standardized instruments and stringent diagnostic criteria (DSM-IV and the International Personality Disorders Examination) in 34 women with DSM-IV PMDD and 22 healthy women without severe premenstrual mood changes.

RESULTS

Seventy-seven percent of the PMDD group had suffered from a past Axis I disorder in comparison with 17% of the control group. Two thirds of the parous women with PMDD had suffered from major depressive disorder in the puerperium. Personality disorder diagnoses were not highly represented in either group of women. The women with PMDD had significantly more obsessional personality traits (p < .001 ) but not absolute personality disorder diagnoses.

CONCLUSION

Obsessional symptoms are known to cluster with the affective disorders and may reflect underlying temperamental and biological vulnerability. This study provides further evidence of the link between serotonergic dysregulation, personality vulnerability, and mood changes related to the female reproductive cycle.

Tryptophan depletion increases aggression in women during the premenstrual phase

RATIONALE

Reducing serotonin by the method of tryptophan depletion (TD) has led to increased aggression but experimental studies have not used female subjects.

OBJECTIVE

To evaluate the effects of TD on aggression in women in the late luteal phase of their menstrual cycle.

METHODS

Healthy women were recruited and randomly assigned to an amino acid drink either depleted or with a balanced amount of tryptophan. At 4.5 h later, they competed on the competitive reaction time task.

RESULTS

Women who had received the TD drink showed more behavioural aggression in response to provocation.

CONCLUSION

Decreased serotonergic neurotransmission increases aggression in women as well as men.

Tryptophan enhancement/depletion and reactions to failure on a cooperative computer game

Twenty-eight high trait hostility male volunteers played a "cooperative" computer game 4.5 hours after an amino acid drink enhanced with, or depleted of, tryptophan. Each trial involved steering a tank through minefields following directions from an unknown "partner." Failure was experienced when the tank hit a mine or when time ran out. Subjects' moods, verbal aggression, attributions of blame, vocal acoustics, and blood pressure were assessed. Differences between tryptophan groups were not significant for primary measures of anger and verbal aggression. However, depleted subjects reported greater increases in feelings of restlessness and incompetence, were less successful in avoiding mines and showed greater increases in blood pressure during the game. Subjects in both groups sent more negative ratings when they lost the game by virtue of hitting a mine rather than losing by running out of time. However, ratings of the depleted group were less influenced by the reason for losing the game. Also, vocal acoustics showed a group X reason-for-losing interaction in the high-frequency band. Tryptophan-depleted subjects with high scores on Behavioral-Activation-System-Drive were most likely to send negative ratings and those scoring high on Buss-Durkee Hostility Inventory Assault and Guilt to report increased anger after the game.

Trait hostility and prolactin response to tryptophan enhancement/depletion

This study investigated the relationship between trait hostility and aspects of serotonergic function by assessing the prolactin (PRL) response to acute tryptophan depletion and enhancement in 28 healthy male volunteers. Serum PRL was assessed immediately before, and 4.5 h after, administration of an amino acid drink enhanced with, or depleted of, the 5-HT precursor tryptophan. Trait hostility and DeltaPRL (value at 4.5 h minus baseline) correlated negatively following enhancement and positively following depletion, indicating that the higher the hostility the smaller the change in PRL in either direction. This is consistent with previous research reporting an association between aggression and blunted neuroendocrine responses to serotonergic agents. The results indicate the possibility that, in people high on hostility, part of the serotonergic pathway that leads to modulation of PRL release is characterised by a stage with either low capacity relative to input availability or a strong negative feedback component.

Plasma tryptophan and trait aggression

Many studies have reported correlations between measures of aggression and indices of serotonergic function, but most have studied patient or offender populations and relatively few have investigated plasma concentrations of the serotonin precursor tryptophan. This study investigates the relationship between plasma concentrations of tryptophan and trait hostility, depression and anxiety in male healthy volunteers. Sixty-seven healthy male volunteers gave blood samples and completed trait questionnaires. Plasma tryptophan was positively correlated with the Buss-Durkee Hostility Inventory Total score and Motor Aggression subscale, but not with the Attitudinal Hostility subscale or with trait anxiety or depression. In conclusion, there is evidence for an association between high concentrations of plasma tryptophan and aggressive behaviour in men, presumably mediated by some aspect of central serotonergic function, which seems unlikely to be explained by high trait anxiety or depression.