scholarly journals Gut microbiota signature in treatment-naïve attention-deficit/hyperactivity disorder

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vanesa Richarte ◽  
Cristina Sánchez-Mora ◽  
Montserrat Corrales ◽  
Christian Fadeuilhe ◽  
Laura Vilar-Ribó ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Gut Microbiota ◽  
Relative Abundance ◽  
Attention Deficit ◽  
Gut Microbiome ◽  
Rating Scale ◽  
Small Sample ◽  
Adhd Group ◽  
Healthy Controls ◽  
Hyperactivity Disorder

AbstractCompelling evidence supports alterations in gut microbial diversity, bacterial composition, and/or relative abundance of several bacterial taxa in attention-deficit/hyperactivity disorder (ADHD). However, findings for ADHD are inconsistent among studies, and specific gut microbiome signatures for the disorder remain unknown. Given that previous studies have mainly focused on the pediatric form of the disorder and involved small sample sizes, we conducted the largest study to date to compare the gastrointestinal microbiome composition in 100 medication-naïve adults with ADHD and 100 sex-matched healthy controls. We found evidence that ADHD subjects have differences in the relative abundance of several microbial taxa. At the family level, our data support a lower relative abundance of Gracilibacteraceae and higher levels of Selenomonadaceae and Veillonellaceae in adults with ADHD. In addition, the ADHD group showed higher levels of Dialister and Megamonas and lower abundance of Anaerotaenia and Gracilibacter at the genus level. All four selected genera explained 15% of the variance of ADHD, and this microbial signature achieved an overall sensitivity of 74% and a specificity of 71% for distinguishing between ADHD patients and healthy controls. We also tested whether the selected genera correlate with age, body mass index (BMI), or scores of the ADHD rating scale but found no evidence of correlation between genera relative abundance and any of the selected traits. These results are in line with recent studies supporting gut microbiome alterations in neurodevelopment disorders, but further studies are needed to elucidate the role of the gut microbiota on the ADHD across the lifespan and its contribution to the persistence of the disorder from childhood to adulthood.

scholarly journals Diminished modulation of preparatory sensorimotor mu rhythm predicts attention-deficit/hyperactivity disorder severity

2017 ◽  
Vol 47 (11) ◽  
pp. 1947-1956 ◽  
Author(s):  
N. ter Huurne ◽  
D. Lozano-Soldevilla ◽  
M. Onnink ◽  
C. Kan ◽  
J. Buitelaar ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Motor Activity ◽  
Attention Deficit ◽  
Rating Scale ◽  
Oscillatory Activity ◽  
Adhd Group ◽  
Mu Rhythm ◽  
Hyperactivity Disorder ◽  
Α Band ◽  
Μ Rhythm

BackgroundAttention-deficit/hyperactivity disorder (ADHD) is characterized by problems in regulating attention and in suppressing disruptive motor activity, i.e. hyperactivity and impulsivity. We recently found evidence that aberrant distribution of posterior α band oscillations (8–12 Hz) is associated with attentional problems in ADHD. The sensorimotor cortex also produces strong 8–12 Hz band oscillations, namely the μ rhythm, and is thought to have a similar inhibitory function. Here, we now investigate whether problems in distributing α band oscillations in ADHD generalize to the μ rhythm in the sensorimotor domain.MethodIn a group of adult ADHD (n = 17) and healthy control subjects (n = 18; aged 21–40 years) oscillatory brain activity was recorded using magnetoencephalography during a visuo-spatial attention task. Subjects had to anticipate a target with unpredictable timing and respond by pressing a button.ResultsPreparing a motor response, the ADHD group failed to increase hemispheric μ lateralization with relatively higher μ power in sensorimotor regions not engaged in the task, as the controls did (F1,33 = 8.70, p = 0.006). Moreover, the ADHD group pre-response μ lateralization not only correlated positively with accuracy (rs = 0.64, p = 0.0052) and negatively with intra-individual reaction time variability (rs = −0.52, p = 0.033), but it also correlated negatively with the score on an ADHD rating scale (rs = −0.53, p = 0.028).ConclusionsWe suggest that ADHD is associated with an inability to sufficiently inhibit task-irrelevant sensorimotor areas by means of modulating μ oscillatory activity. This could explain disruptive motor activity in ADHD. These results provide further evidence that impaired modulation of α band oscillations is involved in the pathogenesis of ADHD.

scholarly journals Evaluation of estrogen and G protein-coupled estrogen receptor 1 (GPER) levels in drug-naïve patients with attention deficit hyperactivity disorder (ADHD)

2018 ◽  
Vol 18 (2) ◽  
pp. 126-131 ◽  
Author(s):  
Nilfer Sahin ◽  
Hatice Altun ◽  
Ergül Belge Kurutaş ◽  
Ebru Fındıklı
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Estrogen Receptor ◽  
G Protein ◽  
Attention Deficit ◽  
Adhd Group ◽  
Healthy Controls ◽  
Hyperactivity Disorder ◽  
Drug Naïve ◽  
G Protein Coupled ◽  
Estrogen Receptor 1

Estrogen has a crucial role in the regulation of reproductive and neuroendocrine function and exerts its effects through two classes of receptors, nuclear and membrane estrogen receptors (mERs). G protein-coupled estrogen receptor 1 (GPER) is a member of mERs, and despite limited research on the levels of GPER in patients with psychiatric diseases, a role of GPER in such conditions has been suggested. Here we evaluated serum estrogen and GPER levels in children with attention deficit hyperactivity disorder (ADHD) in relation to their age- and gender-matched healthy controls. A total of 82 children were included in the study, 47 drug- naïve patients with ADHD (age: 6–12 years; male/female: 34/13) and 35 healthy controls (age: 6–12 years; male/female: 19/16). The subgroups according to ADHD types were inattentive, hyperactive/impulsive, and combined. Serum estrogen was measured using an immunoassay system, while serum GPER was determined using a commercial sandwich enzyme-linked immunosorbent assay kit. Estrogen levels in children with ADHD were similar as in control group, while GPER levels were significantly lower in ADHD group compared to controls (p < 0.05). Logistic regression analysis showed a significant association between GPER levels and ADHD (p < 0.05), and no association between estrogen levels and ADHD (p > 0.05). No significant differences were found in GPER and estrogen levels between ADHD subgroups (p > 0.05). To the best of our knowledge, this study is the first to investigate estrogen and GPER levels in ADHD. Our preliminary findings suggest a relationship between serum GPER levels and ADHD, and this should be further investigated.

Attributions for School Success and Failure by Adolescent Students with and without Attention Deficit Hyperactivity Disorder

2008 ◽  
Vol 102 (2) ◽  
pp. 616-620 ◽  
Author(s):  
Helmut Niederhofer
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
School Success ◽  
Causal Attributions ◽  
Adhd Group ◽  
Healthy Controls ◽  
Adolescent Students ◽  
Hyperactivity Disorder

A study of possible differences in causal attributions between ADHD youth and non-ADHD controls is reported. 40 students (12 to 18 years of age), diagnosed with ADHD by a psychologist and a psychiatrist according to Conners' criteria were compared with healthy controls. Analyses confirmed that external attributions regarding luck were significantly higher for the ADHD group than for the 40 healthy controls. Implications of these findings for intervention in ADHD are discussed.

scholarly journals The Roles of Salience and Value in Inattention Among Children With Attention-Deficit/Hyperactivity Disorder: A Pilot Investigation

2021 ◽  
Vol 12 ◽  
Author(s):  
Erica D. Musser ◽  
Stephanie S. J. Morris ◽  
Kathleen Feeney ◽  
Rosario Pintos Lobo ◽  
Edward F. Ester
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Pilot Study ◽  
Task Performance ◽  
Attention Deficit ◽  
Small Sample ◽  
Group Differences ◽  
Adhd Group ◽  
Typically Developing ◽  
Hyperactivity Disorder

Although inattention is a key symptom subdomain of attention-deficit/hyperactivity disorder (ADHD), the mechanisms underlying this subdomain and related symptoms remain unclear. There is a need for more granular approaches that allow for greater specificity in linking disruptions in specific domains of cognitive performance (e.g., executive function and reward processing) with behavioral manifestations of ADHD. Such approaches may inform the development of more targeted therapeutic interventions. Here, we describe the results of a pilot study of elementary-aged children (ages 6–12years) with ADHD (n=50) and typically developing children (n=48) utilizing a cognitive science task designed to target two dissociable mechanisms of attentional selection: a goal-driven mechanism (i.e., reward/value-driven) and a salience-driven mechanism. Participants were asked to optimally extract and combine information about stimulus salience and value to maximize rewards. While results of this pilot study are ambiguous due to the small sample size and limited number of task trials, data suggest that neither participants with ADHD nor typically developing participants performed optimally to maximize rewards, though typically developing participants were somewhat more successful at the task (i.e., more likely to report high-value targets) regardless of task condition. Further, the manuscript examines several follow-up questions regarding group differences in task response times and group differences in task performance as related to sustained attention across the duration of the task. Finally, the manuscript examines follow-up questions related to heterogeneity in the ADHD group (i.e., age, DSM 5 presentation, and comorbid diagnosis) in predicting task performance.

scholarly journals Atomoxetine and circadian gene expression in human dermal fibroblasts from study participants with a diagnosis of attention-deficit hyperactivity disorder

2021 ◽  
Author(s):  
Frank Faltraco ◽  
Denise Palm ◽  
Adriana Uzoni ◽  
Frederick Simon ◽  
Oliver Tucha ◽  
...  
Keyword(s):  
Gene Expression ◽  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Dermal Fibroblasts ◽  
Adhd Group ◽  
Healthy Controls ◽  
Circadian Gene ◽  
Hyperactivity Disorder ◽  
Circadian Preference ◽  
Study Participants

AbstractAtomoxetine (ATO) is a second line medication for attention-deficit hyperactivity disorder (ADHD). We proposed that part of the therapeutic profile of ATO may be through circadian rhythm modulation. Thus, the aim of this study was to investigate the circadian gene expression in primary human-derived dermal fibroblast cultures (HDF) after ATO exposure. We analyzed circadian preference, behavioral circadian and sleep parameters as well as the circadian gene expression in a cohort of healthy controls and participants with a diagnosis of ADHD. Circadian preference was evaluated with German Morningness-Eveningness-Questionnaire (D-MEQ) and rhythms of sleep/wake behavior were assessed via actigraphy. After ex vivo exposure to different ATO concentrations in HDF cultures, the rhythmicity of circadian gene expression was analyzed via qRT-PCR. No statistical significant effect of both groups (healthy controls, ADHD group) for mid-sleep on weekend days, mid-sleep on weekdays, social jetlag, sleep WASO and total number of wake bouts was observed. D-MEQ scores indicated that healthy controls had no evening preference, whereas subjects with ADHD displayed both definitive and moderate evening preferences. ATO induced the rhythmicity of Clock in the ADHD group. This effect, however, was not observed in HDF cultures of healthy controls. Bmal1 and Per2 expression showed a significant ZT × group interaction via mixed ANOVA. Strong positive correlations for chronotype and circadian genes were observed for Bmal1, Cry1 and Per3 among the study participants. Statistical significant different Clock, Bmal1 and Per3 expressions were observed in HDFs exposed to ATO collected from ADHD participants exhibiting neutral and moderate evening preference, as well as healthy participants with morning preferences. The results of the present study illustrate that ATO impacts on circadian function, particularly on Clock, Bmal1 and Per2 gene expression.

EARLY RECOGNIZATION OF THE CHILDREN WITH ATTENTION DEFICIT HYPERACTIVITY DISORDER BY VANDERBILT ADHD RATING SCALE FOR TEACHERS AND PARENTS

2019 ◽  
pp. 85-91
Author(s):  
Dinh Duong Le ◽  
Van Thang Vo ◽  
Thi Mai Nguyen ◽  
Thi Han Vo ◽  
Huu Chau Duc Nguyen ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
High Risk ◽  
Attention Deficit ◽  
Primary Schools ◽  
Rating Scale ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Hyperactivity Disorder ◽  
Teachers And Parents ◽  
Key Words Adhd

Objectives: The study aims to explore the prevalence of attention deficit hyperactivity disorder and to examine the associated factors with ADHD among primary students by Vanderbilt ADHD rating scale for teacher and parents. Methods: A cross-sectional study design was conducted in 564 students who selected randomly in 4 primary schools in Hue city. Vanderbilt ADHD rating scale for parents and teachers were applied to evaluate the ADHD of children over 6 months ago. Results: The overall prevalence of children who had high risk with ADHD was 4.1% (95%CI: 2.44 - 5.72), including 4.6% and 4.8% in the rating of teachers and parents, respectively. Male was more likely to have ADHD than female (OR adj: 4.64 (95%CI: 1.53 - 14.05) and lack of closely friend (OR adj: 5.11 (95% CI: 2.13 - 12.24). Conclusion: Vanderbilt ADHD diagnosis rating scale for teachers and parents can be used to early recognization children with a high risk of ADHD. Key words: ADHD, Vanderbilt, ratings scale, teacher, parent, children

scholarly journals Psychometric Evaluation of the Persian Version of Barkley Adult Attention Deficit/Hyperactivity Disorder Screening Tool among the Elderly

Scientifica ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Mostafa Sadeghi ◽  
Homayoun Sadeghi-Bazargani ◽  
Shahrokh Amiri
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Internal Consistency ◽  
Attention Deficit ◽  
Concurrent Validity ◽  
Rating Scale ◽  
Retest Reliability ◽  
Hyperactivity Disorder ◽  
Persian Version ◽  
Test Retest Reliability ◽  
Tabriz City

Background. The Barkley Adult Attention Deficit/Hyperactivity Disorder (ADHD) Rating Scale-IV (BAARS-IV) was developed, and it demonstrated good psychometric properties. The BAARS-IV includes 27 questions on the symptoms of adult ADHD. The purpose of the present study is to investigate the psychometric testing of the Persian version of BAARS-IV among the elderlies in Tabriz City. Method. This cross-sectional study was conducted in Tabriz City—in the west of Iran—in 2015 via enrolling of 121 old-aged people. We did the process of translation and adaptation of BAARS-IV and examined its concurrent validity, internal consistency, and test-retest reliability. Result. The BAARS-IV demonstrated good internal consistency and test-retest reliability. Correlations between the BAARS-IV and the CAARS-S: SV were high and evidence supporting concurrent validity was revealed. Cronbach’s alpha for the overall scale and subscales stood at 0.89, 0.81, 0.66, 0.56, and 0.82, respectively. Conclusion. The Persian BAARS-IV showed acceptable reliability and validity. BAARS-IV was determined to be composed of internally consistent and psychometrically sound items.

Neural correlates of visuospatial working memory in attention-deficit/hyperactivity disorder and healthy controls

2015 ◽  
Vol 233 (2) ◽  
pp. 233-242 ◽  
Author(s):  
Hanneke van Ewijk ◽  
Wouter D. Weeda ◽  
Dirk J. Heslenfeld ◽  
Marjolein Luman ◽  
Catharina A. Hartman ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Working Memory ◽  
Attention Deficit ◽  
Neural Correlates ◽  
Healthy Controls ◽  
Visuospatial Working Memory ◽  
Hyperactivity Disorder
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