Is There an Enhancing Effect of Neuroleptic Drugs on Blood Coagulation and Thrombosis

Sordinol (R), (clopenthixol, W.H. 0.), a potent sedative of the thiaxanthene group, in the concentrations used therapeutically, had no direct influence on blood coagulation as investigated by the thrombin generation test and the thromboplastin activation test. No significant direct effect on the fibrinolytic system was observed using urokinase, streptokinase activated human euglobulin, trypsin, porcine plasmin, or human plasmin. There was no effect on the urokinase-inhibiting effect of normal human plasma. The influence of the immobilization produced by heavy sedation on the development of thrombotic states is discussed. When the effects of drugs are evaluated it is necessary to distinguish between the direct effect of the drug and secondary effects caused by the treatment.

Subcortical volumetric abnormalities in bipolar disorder

Considerable uncertainty exists about the defining brain changes associated with bipolar disorder (BD). Understanding and quantifying the sources of uncertainty can help generate novel clinical hypotheses about etiology and assist in the development of biomarkers for indexing disease progression and prognosis. Here we were interested in quantifying case-control differences in intracranial volume (ICV) and each of eight subcortical brain measures: nucleus accumbens, amygdala, caudate, hippocampus, globus pallidus, putamen, thalamus, lateral ventricles. In a large study of 1710 BD patients and 2594 healthy controls, we found consistent volumetric reductions in BD patients for mean hippocampus (Cohen's d=-0.232; P=3.50 × 10-7) and thalamus (d=-0.148; P=4.27 × 10-3) and enlarged lateral ventricles (d=-0.260; P=3.93 × 10-5) in patients. No significant effect of age at illness onset was detected. Stratifying patients based on clinical subtype (BD type I or type II) revealed that BDI patients had significantly larger lateral ventricles and smaller hippocampus and amygdala than controls. However, when comparing BDI and BDII patients directly, we did not detect any significant differences in brain volume. This likely represents similar etiology between BD subtype classifications. Exploratory analyses revealed significantly larger thalamic volumes in patients taking lithium compared with patients not taking lithium. We detected no significant differences between BDII patients and controls in the largest such comparison to date. Findings in this study should be interpreted with caution and with careful consideration of the limitations inherent to meta-analyzed neuroimaging comparisons.

Consensus Statements On Cognitive Dysfunction In Depression In The Uk: Rationale And Process For Gaining Consensus

Introduction

Cognitive dysfunction is an important aspect of depression that includes problems with thinking, concentration and memory. Research suggests that the cognitive aspect of depression is highly prevalent and has a significant impact on patient functioning. Currently, cognitive dysfunction in depression is largely unrecognised, unmonitored and untreated.

Aims

We aim to define cognitive dysfunction in clinical depression (major depressive disorder) and explore its detection and management in the UK, highlighting priority areas to be addressed.

Methods

A modified Delphi method was used as the process to gain consensus. A multi-stakeholder steering committee of depression experts (including psychiatrists, psychologists, primary care physicians, and representatives from occupational therapy and a depression charity) provided the key themes and, through round-table discussion, developed draft statements. The main areas of focus were burden, detection and management of cognitive dysfunction in depression. These statements formed a questionnaire to be reviewed by 150–200 health-care professionals with an involvement in the management of depression, with level of agreement noted as ‘strongly disagree’, ‘disagree’, ‘don’t know/uncertain’, ‘agree’ or ‘strongly agree’. Responses to the questionnaire will be analysed (very high agreement [> 66%] or very low agreement [< 33%]) and the steering committee will revise and finalise the consensus statements, and identify priority areas for future consideration. The steering committee was initiated and supported by the pharmaceutical company Lundbeck Ltd, through an educational grant. Lundbeck Ltd did not influence content.

Results

Results of the questionnaire and the evolution of the final consensus statements will be presented.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Carnitine levels in skeletal muscle, blood, and urine in patients with primary carnitine deficiency during intermission of L-carnitine supplementation

BACKGROUND

Primary carnitine deficiency (PCD) is a disorder of fatty acid oxidation with a high prevalence in the Faroe Islands. Only patients homozygous for the c.95A>G (p.N32S) mutation have displayed severe symptoms in the Faroese patient cohort. In this study, we investigated carnitine levels in skeletal muscle, plasma, and urine as well as renal elimination kinetics before and after intermission with L-carnitine in patients homozygous for c.95A>G.

METHODS

Five male patients homozygous for c.95A>G were included. Regular L-carnitine supplementation was stopped and the patients were observed during five days. Blood and urine were collected throughout the study. Skeletal muscle biopsies were obtained at 0, 48, and 96 h.

RESULTS

Mean skeletal muscle free carnitine before discontinuation of L-carnitine was low, 158 nmol/g (SD 47.4) or 5.4% of normal. Mean free carnitine in plasma (fC0) dropped from 38.7 (SD 20.4) to 6.3 (SD 1.7) μmol/L within 96 h (p < 0.05). Mean T 1/2 following oral supplementation was approximately 9 h. Renal reabsorption of filtered carnitine following oral supplementation was 23%. The level of mean free carnitine excreted in urine correlated (R (2) = 0.78, p < 0.01) with fC0 in plasma.

CONCLUSION

Patients homozygous for the c.95A>G mutation demonstrated limited skeletal muscle carnitine stores despite long-term high-dosage L-carnitine supplementation. Exacerbated renal excretion resulted in a short T 1/2 in plasma carnitine following the last oral dose of L-carnitine. Thus a treatment strategy of minimum three daily separate doses of L-carnitine is recommended, while intermission with L-carnitine treatment might prove detrimental.

Velocity-space sensitivity of the time-of-flight neutron spectrometer at JET

The velocity-space sensitivities of fast-ion diagnostics are often described by so-called weight functions. Recently, we formulated weight functions showing the velocity-space sensitivity of the often dominant beam-target part of neutron energy spectra. These weight functions for neutron emission spectrometry (NES) are independent of the particular NES diagnostic. Here we apply these NES weight functions to the time-of-flight spectrometer TOFOR at JET. By taking the instrumental response function of TOFOR into account, we calculate time-of-flight NES weight functions that enable us to directly determine the velocity-space sensitivity of a given part of a measured time-of-flight spectrum from TOFOR.

Resolving the bulk ion region of millimeter-wave collective Thomson scattering spectra at ASDEX Upgrade

Collective Thomson scattering (CTS) measurements provide information about the composition and velocity distribution of confined ion populations in fusion plasmas. The bulk ion part of the CTS spectrum is dominated by scattering off fluctuations driven by the motion of thermalized ion populations. It thus contains information about the ion temperature, rotation velocity, and plasma composition. To resolve the bulk ion region and access this information, we installed a fast acquisition system capable of sampling rates up to 12.5 GS/s in the CTS system at ASDEX Upgrade. CTS spectra with frequency resolution in the range of 1 MHz are then obtained through direct digitization and Fourier analysis of the CTS signal. We here describe the design, calibration, and operation of the fast receiver system and give examples of measured bulk ion CTS spectra showing the effects of changing ion temperature, rotation velocity, and plasma composition.