Differential association between MAOA, ADHD and neuropsychological functioning in boys and girls

Contains fulltext : 70148.pdf (publisher's version ) (Closed access)Attention-deficit/hyperactivity disorder (ADHD) is more common in boys than in girls. It has been hypothesized that this sex difference might be related to genes on the X-chromosome, like Monoamine Oxidase A (MAOA). Almost all studies on the role of MAOA in ADHD have focused predominantly on boys, making it unknown whether MAOA also has an effect on ADHD in girls, and few studies have investigated the relationship between MAOA and neuropsychological functioning, yet this may provide insight into the pathways leading from genotype to phenotype. The current study set out to examine the relationship between MAOA, ADHD, and neuropsychological functioning in both boys (265 boys with ADHD and 89 male non-affected siblings) and girls (85 girls with ADHD and 106 female non-affected siblings). A haplotype was used based on three single nucleotide polymorphisms (SNPs) (rs12843268, rs3027400, and rs1137070). Two haplotypes (GGC and ATT) captured 97% of the genetic variance in the investigated MAOA SNPs. The ATT haplotype was more common in non-affected siblings (P = 0.025), conferring a protective effect for ADHD in both boys and girls. The target and direction of the MAOA effect on neuropsychological functioning was different in boys and girls: The ATT haplotype was associated with poorer motor control in boys (P = 0.002), but with better visuo-spatial working memory in girls (P = 0.01). These findings suggest that the genetic and neuropsychological mechanisms underlying ADHD may be different in boys and girls and underline the importance of taking into account sex effects when studying ADHD

About breaking barriers, the risk paradox, and other twists

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Slow processing speed:a cross-disorder phenomenon with significant clinical value, and in need of further methodological scrutiny

Contains fulltext : 229208.pdf (Publisher’s version ) (Open Access

Substance use disorders in adolescents with attention deficit hyperactivity disorder: a 4-year follow-up study

Aim To examine the relationship between a childhood diagnosis of attention deficit hyperactivity disorder (ADHD) with or without oppositional defiant disorder (ODD)/conduct disorder (CD) and the development of later alcohol/drug use disorder [psychoactive substance use disorder (PSUD)] and nicotine dependence in a large European sample of ADHD probands, their siblings and healthy control subjects. Participants design and settingSubjects (n=1017) were participants in the Belgian, Dutch and German part of the International Multicenter ADHD Genetics (IMAGE) study. IMAGE families were identified through ADHD probands aged 5-17 years attending out-patient clinics, and control subjects from the same geographic areas. After a follow-up period (mean: 4.4 years) this subsample was re-assessed at a mean age of 16.4 years. Measurements PSUD and nicotine dependence were assessed using the Diagnostic Interview Schedule for Children, Alcohol Use Disorders Identification Test, Drug Abuse Screening Test and Fagerstrom test for Nicotine Dependence. Findings The ADHD sample was at higher risk of developing PSUD [hazard ratio (HR)=1.77, 95% confidence interval (CI)=1.05-3.00] and nicotine dependence (HR=8.61, 95% CI=2.44-30.34) than healthy controls. The rates of these disorders were highest for ADHD youth who also had CD, but could not be accounted for by this comorbidity. We did not find an increased risk of developing PSUD (HR=1.18, 95% CI=0.62-2.27) or nicotine dependence (HR=1.89, 95% CI=0.46-7.77) among unaffected siblings of ADHD youth. Conclusions A childhood diagnosis of attention deficit hyperactivity disorder is a risk factor for psychoactive substance use disorder and nicotine dependence in adolescence and comorbid conduct disorder, but not oppositional defiant disorder, further increases the risk of developing psychoactive substance use disorder and nicotine dependence

A review and analysis of the relationship between neuropsychological measures and DAT1 in ADHD

Contains fulltext : 69105.pdf (publisher's version ) (Closed access)Meta-analyses indicate that the gene coding for the dopamine transporter (DAT1 or SLC6A3) is associated with an increased risk for ADHD. The mechanisms of this gene for ADHD are unclear. We systematically reviewed studies linking the VNTR in the 3' UTR of the DAT1 to neurophysiological and neuropsychological measures. In addition, a broad set of executive/cognitive and motor tests was administered to 350 children (5-11 years) and adolescents (11-19 years) with ADHD and 195 non-affected siblings. Two VNTRs (in intron 8 and the 3' UTR) and four SNPs (two 5' and two 3') in DAT1 were genotyped. The effect of the polymorphisms on neuropsychological functioning was studied. The review indicated that the majority of studies did not find a relation between DAT1 and neurophysiological or neuropsychological measures. In our sample, several of the polymorphisms of DAT1 were associated with ADHD and ADHD was associated with impaired neuropsychological functioning. However, none of the DAT1 polymorphisms was convincingly associated with neuropsychological dysfunctioning. This suggests that the effect of DAT1 on ADHD was not mediated by neuropsychological performance. However, since DAT1 is mainly expressed in the striatum and not the prefrontal cortex, it may influence striatum-related functions (such as delay aversion) more heavily than prefrontal related functions (such as executive functions). Associations of DAT1 with ADHD were only found in adolescents, which may suggest that DAT1 mainly exerts its effect in adolescence, and/or that having a more persistent form of ADHD may mark a more severe or homogeneous genetic form of the disorder

De arbeidsongeschiktheidsverzekering: tussen publiek en privaat. Een beschrijving, analyse en waardering van de belangrijkste wijzigingen in het Nederlandse arbeidsongeschiktheidsstelsel tussen 1980 en 2010

Het Nederlandse arbeidsongeschiktheidsstelsel bestaat uit wettelijke regelingen, zoals de loondoorbetaling bij ziekte op grond van het Burgerlijk Wetboek en de Wet Werk en inkomen naar arbeidsvermogen, én uit cao-regelingen die een bovenwettelijke aanvulling verstrekken. De laatste dertig jaar zijn de wettelijke regelingen vaak en grondig herzien. In reactie daarop hebben sociale partners hun cao-regelingen aangepast. In deze studie worden de belangrijkste wijzigingen onderzocht die zich tussen 1980 en 2010 hebben voorgedaan in de personele en materiële werkingssfeer, de financiering en de uitvoering van de hiervoor bedoelde regelingen. Daarbij staat de vraag centraal hoe die wijzigingen en de daaraan ten grondslag liggende overwegingen, kunnen worden gewaardeerd. Dat geschiedt op basis van vijf criteria: mate van keuzevrijheid, mate van inkomensbescherming, mate van solidariteit, aantal arbeidsongeschikten en totale kosten. Verder wordt onderzocht welke alternatieven er bestaan voor het huidige arbeidsongeschiktheidsstelsel. Ook die alternatieven worden gewaardeerd op basis van de vijf hiervoor genoemde criteria. Op deze manier wordt de bestaande kennis over de grondslagen van het huidige arbeidsongeschiktheidsstelsel verdiept. Waarom is het stelsel ingericht zoals het is ingericht? Wat zijn de voor- en nadelen van dit stelsel? Meer concreet wordt ingegaan op de noodzaak of wenselijkheid van een verzekeringsplicht voor werknemers, de optimale verhouding tussen publieke en private inkomensbescherming, de spanning tussen rechtvaardigheid en doelmatigheid bij de financiering van de uitkeringslasten, de effectiviteit van financiële prikkels en de doelmatigheid van de uitvoering.Hervorming Sociale Regelgevin

Structural brain imaging correlates of ASD and ADHD across the lifespan:a hypothesis-generating review on developmental ASD-ADHD subtypes

Contains fulltext : 169832.pdf (publisher's version ) (Open Access)We hypothesize that it is plausible that biologically distinct developmental ASD-ADHD subtypes are present, each characterized by a distinct time of onset of symptoms, progression and combination of symptoms. The aim of the present narrative review was to explore if structural brain imaging studies may shed light on key brain areas that are linked to both ASD and ADHD symptoms and undergo significant changes during development. These findings may possibly pinpoint to brain mechanisms underlying differential developmental ASD-ADHD subtypes. To this end we brought together the literature on ASD and ADHD structural brain imaging symptoms and particularly highlight the adolescent years and beyond. Findings indicate that the vast majority of existing MRI studies has been cross-sectional and conducted in children, and sometimes did include adolescents as well, but without explicitly documenting on this age group. MRI studies documenting on age effects in adults with ASD and/or ADHD are rare, and if age is taken into account, only linear effects are examined. Data from various studies suggest that a crucial distinctive feature underlying different developmental ASD-ADHD subtypes may be the differential developmental thinning patterns of the anterior cingulate cortex and related connections towards other prefrontal regions. These regions are crucial for the development of cognitive/effortful control and socio-emotional functioning, with impairments in these features as key to both ASD and ADHD

Реалізація органами влади Автономної Республіки Крим та органами місцевого самоврядування повноважень у сфері адміністративно-територіального устрою України

Досліджено практику реалізації органами влади Автономної Республіки Крим та органами місцевого самоврядування повноважень у сфері адміністративно-територіального устрою України.Исследуется практика реализации органами власти Автономной Республики Крым и органами местного самоуправления полномочий в сфере административно-территориального устройства Украины.The article is devoted to the research of practical realization of powers by the official bodies of Autonomous Republic of Crimea and local self-government bodies in the sphere of Ukrainian administrative-territorial system

Emotion dysregulation as cross-disorder trait in child psychiatry predicting quality of life and required treatment duration

BACKGROUND: Emotion dysregulation (ED) is increasingly under investigation as a cross-disorder trait, and is by some considered as the core feature in mental disorders. The aims of this study were to scrutinize the overlapping and distinct characteristics of ED for internalizing, externalizing and neurodevelopmental disorders and to identify the most pertinent ED characteristics to guide clinicians in treatment choice.METHODS: Information on clinical diagnosis (Attention Deficit/Hyperactivity Disorder ADHD, Autism Spectrum Disorder, Oppositional Defiant Disorder/Conduct Disorder, Anxiety and Mood Disorders), ED (measured by the CBCL-Emotion Dysregulation Index), Quality of Life (Qol, measured by the Kidscreen-27), and treatment duration (measured by Electronic Health Records) was retrieved from two large samples of toddlers (1.5-5  year old; N  = 1,544) and school aged children (6-18 year old; N  = 7,259). Frequency scores and logistic regression were used to study symptom profiles of ED, as measured with CBCL-EDI, across all disorders. Linear regression was used to determine the predictive value of ED (CBCL-EDI total score) regarding QoL and treatment duration in addition to-and in interaction with-clinical diagnosis. RESULTS: Across disorders, equal levels of total ED were found, which predicted lower QoL and a longer treatment duration in addition to clinical diagnosis. The majority of items (11/15 and 16/18) were of equal relevance to the disorders; items that were not, largely reflected disorder specific DSM definitions (i.e., externalizing symptoms in ODD/CD and internalizing symptoms in Anxiety and Mood disorders).CONCLUSION: ED is a clinically useful cross-disorder trait to predict severity of impairment as well as required treatment duration. In addition, ED is largely composed of shared features across disorders, with certain disorder specific colored elements.</p