Understanding regional variation in euthanasia using geomedical frameworks: a critical ethical reflection.

Considerable geographical variation in the uptake of euthanasia has been reported: some municipalities in the Netherlands have a 25 times higher euthanasia rate than other municipalities. Current 'geomedical' frameworks for interpreting practice variation in health care utilization seem inadequately tailored to understand regional variation in morally controversial procedures such as euthanasia. The aim of this conceptual article is threefold: i) to add relevant medical ethical principles to current frameworks; ii) to provide a four-step ethical-geomedical model for the interpretation of geographical differences in the utilization of health care in general and for ethically controversial treatments in specific; iii) to gain better understanding of the existing geographical variation in the incidence of euthanasia by using this framework in our analysis.

[Why regulation of active life termination in children remains problematic].

The case description regards a nine-years old patient who, as a consequence of a very serious epilepsy syndrome, several forms of comorbidity, severe developmental impairments, and the absence of meaningful contact with relatives, is felt to be in very serious suffering. Parents and physicians decide to end the child's life by withholding nutrition and hydration. Based on this case description and on the parents' experiences, its authors argue in favour of a stately regulated procedure for active life termination.

Challenges in pastoral care practice in euthanasia: A concept mapping study among Dutch protestant pastors.

This study explores the various difficulties that protestant pastors experience in the context of care for parishioners with a wish for euthanasia. In a reproducible and non-subjective way, using the concept mapping method, we cluster and rank-order 600 elements that pastors had mentioned as "difficult in caring for parishioners with a death wish" in an earlier survey study. The three clusters of items ranked as most difficult are connected with inappropriate care, doubts whether euthanasia in specific circumstances is justified, and disagreements between pastor and parishioner, including the emotional burden arising from those disagreements.

Simultaneous Quantification of the Concentration and Carbon Isotopologue Distribution of Polar Metabolites in a Single Analysis by Gas Chromatography and Mass Spectrometry.

C-isotope tracing is a frequently employed approach to study metabolic pathway activity. When combined with the subsequent quantification of absolute metabolite concentrations, this enables detailed characterization of the metabolome in biological specimens and facilitates computational time-resolved flux quantification. Classically, a C-isotopically labeled sample is required to quantify C-isotope enrichments and a second unlabeled sample for the quantification of metabolite concentrations.

A toolbox for the comprehensive analysis of small volume human intestinal samples that can be used with gastrointestinal sampling capsules.

Detailed knowledge on the fate of dietary components inside the human intestinal tract is lacking. Access to this inner world of digestion is now possible through novel human gastrointestinal sampling capsules. Due to the novelty of such devices, no methodology has been published to stabilise and analyse the resulting samples.

Euthanasia in the Netherlands: a claims data cross-sectional study of geographical variation.

Background: The annual incidence of euthanasia in the Netherlands as a percentage of all deaths rose from 1.9% in 1990 to 4.4% in 2017.

Urinary 3-hydroxyisovaleryl carnitine excretion, protein energy malnutrition and risk of all-cause mortality in kidney transplant recipients: Results from the TransplantLines cohort studies.

Background: Leucine is an essential amino acid and a potent stimulator of muscle protein synthesis. Since muscle wasting is a major risk factor for mortality in kidney transplant recipients (KTR), dietary leucine intake might be linked to long-term mortality. Urinary 3-hydroxyisovaleryl carnitine (3-HIC) excretion, a functional marker of marginal biotin deficiency, may also serve as a marker for dietary leucine intake.

A human-like bile acid pool induced by deletion of hepatic modulates effects of FXR activation in mice.

Bile acids (BAs) facilitate intestinal absorption of lipid-soluble nutrients and modulate various metabolic pathways through the farnesoid X receptor (FXR) and Takeda G-protein-coupled receptor 5. These receptors are targets for therapy in cholestatic and metabolic diseases. However, dissimilarities in BA metabolism between humans and mice complicate translation of preclinical data.

The effect of high compared with low dairy consumption on glucose metabolism, insulin sensitivity, and metabolic flexibility in overweight adults: a randomized crossover trial.

Background: Dairy products contain many nutritious components that may benefit metabolic health. There are indications that glucose metabolism and insulin sensitivity, which are generally disturbed in overweight and obese individuals, may improve by increased dairy intake. This may also affect one's metabolic flexibility.

Advance care planning conversations with palliative patients: looking through the GP's eyes.

Background: Although it is often recommended that general practitioners (GPs) initiate advance care planning (ACP), little is known about their experiences with ACP. This study aimed to identify GP experiences when conducting ACP conversations with palliative patients, and what factors influence these experiences.

Methods: Dutch GPs (N = 17) who had participated in a training on timely ACP were interviewed.

One- vs two-phase extraction: re-evaluation of sample preparation procedures for untargeted lipidomics in plasma samples.

Lipidomics is a rapidly developing field in modern biomedical research. While LC-MS systems are able to detect most of the known lipid classes in a biological matrix, there is no single technique able to extract all of them simultaneously. In comparison with two-phase extractions, one-phase extraction systems are of particular interest, since they decrease the complexity of the experimental procedure.

Acetyl-4'-phosphopantetheine is stable in serum and prevents phenotypes induced by pantothenate kinase deficiency.

Coenzyme A is an essential metabolite known for its central role in over one hundred cellular metabolic reactions. In cells, Coenzyme A is synthesized de novo in five enzymatic steps with vitamin B5 as the starting metabolite, phosphorylated by pantothenate kinase. Mutations in the pantothenate kinase 2 gene cause a severe form of neurodegeneration for which no treatment is available.

Transintestinal Cholesterol Transport Is Active in Mice and Humans and Controls Ezetimibe-Induced Fecal Neutral Sterol Excretion.

Except for conversion to bile salts, there is no major cholesterol degradation pathway in mammals. Efficient excretion from the body is therefore a crucial element in cholesterol homeostasis. Yet, the existence and importance of cholesterol degradation pathways in humans is a matter of debate.

Identifying 24 h variation in the pharmacokinetics of levofloxacin: a population pharmacokinetic approach.

Aim: The objective of this study was to investigate whether the pharmacokinetics of orally administered levofloxacin show 24 h variation. Levofloxacin was used as a model compound for solubility and permeability independent absorption and passive renal elimination.

Methods: In this single centre, crossover, open label study, 12 healthy subjects received an oral dose of 1000 mg levofloxacin at six different time points equally divided over the 24 h period.

[The fringes of the euthanasia law].

A survey published in the Dutch Journal of Medicine (NTvG) shows that doctors asked to assess the suffering of patients making a request for euthanasia may give very different opinions. In this paper, I argue that this stems from the subjective character of the term 'unbearable' and that differences are bound to occur even more frequently in 'borderline' cases, such as those presented here. In my opinion, such differences do not justify a plea to abandon the assessment of unbearable suffering altogether.

Repeat analysis and incurred sample reanalysis: recommendation for best practices and harmonization from the global bioanalysis consortium harmonization team.

The A7 harmonization team (A7 HT), a part of the Global Bioanalysis Consortium (GBC), focused on reviewing best practices for repeat analysis and incurred sample reanalysis (ISR) as applied during regulated bioanalysis. With international representation from Europe, Latin America, North America, and the Asia Pacific region, the team first collated common practices and guidance recommendations and assessed their suitability from both a scientific and logistical perspective. Subsequently, team members developed best practice recommendations and refined them through discussions and presentations with industry experts at scientific meetings.

Peculiar observations in measuring testosterone in women treated with oral contraceptives supplemented with dehydroepiandrosterone (DHEA).

Total testosterone is considered to be decreased during the use of combined oral contraceptives. There is, however, considerable concern about the quality of testosterone assays, especially at low levels. We aimed to confirm testosterone levels measured by direct radioimmunoassay in a recent clinical trial with a state-of-the-art LC-MSMS method.

Plasma plant sterols serve as poor markers of cholesterol absorption in man.

The validation of the use of plasma plant sterols as a marker of cholesterol absorption is frail. Nevertheless, plant sterol concentrations are routinely used to describe treatment-induced changes in cholesterol absorption. Their use has also been advocated as a clinical tool to tailor cholesterol-lowering therapy.

Recommendations on biomarker bioanalytical method validation by GCC.

The 5th GCC in Barcelona (Spain) and 6th GCC in San Antonio (TX, USA) events provided a unique opportunity for CRO leaders to openly share opinions and perspectives, and to agree upon recommendations on biomarker bioanalytical method validation.

Serial CSF sampling over a period of 30 h via an indwelling spinal catheter in healthy volunteers: headache, back pain, tolerability and measured acetylcholine profile.

Background/aim: Timed interval cerebrospinal fluid (CSF) sampling by indwelling catheterization can be a valuable corroborative tool for the pharmacokinetic and pharmacodynamic assessment of drugs. CSF sampling in studies on drug candidates for Alzheimer's disease have been conducted in evaluations of the biomarkers acetylcholine (ACh), tau proteins, amyloid precursor protein and beta-amyloid fragments. The primary aim of this study was to study the feasibility and the burden on the healthy volunteers of serial CSF sampling within the contract research organization environment in order to establish a standardized research tool for future drug development studies.

Recommendations on bioanalytical method stability implications of co-administered and co-formulated drugs by Global CRO Council for Bioanalysis (GCC).

An open letter written by the Global CRO Council for Bioanalysis (GCC) describing the GCC survey results on stability data from co-administered and co-formulated drugs was sent to multiple regulatory authorities on 14 December 2011. This letter and further discussions at different GCC meetings led to subsequent recommendations on this topic of widespread interest within the bioanalytical community over the past 2 years.