@phdthesis{Peters2023,
  author    = {Peters, Katharina},
  title     = {Biological Substrates of Waiting Impulsivity in Children and Adolescents with and without ADHD},
  doi       = {10.25972/OPUS-24636},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-246368},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2023},
  abstract  = {Focus of the present work were the questions whether and how the concept of waiting impulsivity (WI), defined as the ability to regulate a response in anticipation of reward and measured by the 4-choice serial reaction time task (4-CSRTT), may contribute to our understanding of Attention-Deficit/Hyperactivity Disorder (ADHD) and its neurobiological underpinnings. To address this topic, two studies were conducted: in a first study, the relationship be-tween 4-CSRTT behavioral measures, neural correlates and ADHD symptom domains, i.e. inattention (IA) and hyperactivity/impulsivity (H/I) was explored in a pooled sample of 90 children and adolescents with (n=44) and without (n=46) ADHD diagnosis. As ex-pected, IA was associated with dorsolateral prefrontal brain regions linked with executive functions and attentional control, which was evident on the structural and the functional level. Higher levels of both IA and H/I covaried with decreased activity in the right ven-trolateral prefrontal cortex (PFC), a central structure for response inhibition. Moderation analyses revealed that H/I-related decreased activation in this region did not map linearly on difficulties on the behavioral level: brain activation was a significant predictor of task accuracy only, when H/I symptoms were low/absent but not for clinically relevant ADHD symptoms. Further, H/I was implicated in dysfunctional top-down control of reward eval-uation. Both symptom domains correlated positively with hippocampus (HC) activity in anticipation of reward. In addition, for high H/I symptoms, greater activation in the HC was found to correlate with higher motivation on the behavioral level, indicating that rein-forcement-learning and/or contingency awareness may contribute to altered reward pro-cessing in ADHD patients. In a second study, the possible serotonergic modulation of WI and the ADHD-WI relation-ship was addressed in a sub-sample comprising 86 children and adolescents of study I. The effects of a functional variant in the gene coding for the rate-limiting enzyme in the synthesis of brain serotonin on behavior and structure or function of the WI-network was investigated. Moderation analyses revealed that on the behavioral level, a negative corre-lation between accuracy and IA was found only in GG-homozygotes, whereas no signifi-cant relationship emerged for carriers of the T-allele. This is in line with previous reports of differential effects of serotonergic modulation on attentional performance depending on the presence of ADHD symptoms. A trend-wise interaction effect of genotype and IA for regional volume of the right middle frontal gyrus was interpreted as a hint towards an involvement of the PFC in this relationship, although a more complex mechanism includ-ing developmental effects can be assumed. In addition, interaction effects of genotype and IA were found for brain activation in the amygdala (AMY) und HC during perfor-mance of the 4-CSRTT, while another interaction was found for H/I symptoms and geno-type for right AMY volume. These findings indicate a serotonergic modulation of coding of the emotional value of reward during performance of the 4-CSRTT that varies de-pending on the extent of psychopathology-associated traits. Taken together, it was shown that the 4-CSRTT taps distinct domains of impulsivity with relevance to ADHD symptomatology: (proactive) response inhibition difficulties in relation with anticipation of reward. Furthermore, the two symptom domains, IA and H/I, contrib-ute differently to WI, which emphasizes the need to distinguish both in the research of ADHD. The results of study II emphasized the relevance of serotonergic transmission especially for attentional control and emotional processing. Although the present findings need replication and further refinement in more homogenous age groups, the use of the 4-CSRTT with a dimensional approach is a very promising strategy, which will hopefully extend our understanding of impulsivity-related mental disorders in the future.},
  subject      = {Aufmerksamkeitsdefizit-Syndrom},
  language  = {en}
}
@article{FernandezCastilloCabanaDominguezKappeletal.2021,
  author    = {Fern{\`a}ndez-Castillo, No{\`e}lia and Cabana-Dom{\´i}nguez, Judit and Kappel, Djenifer B. and Torrico, B{\`a}rbara and Weber, Heike and Lesch, Klaus-Peter and Lao, Oscar and Reif, Andreas and Cormand, Bru},
  title     = {Exploring the contribution to ADHD of genes involved in Mendelian disorders presenting with hyperactivity and/or inattention},
  series = {Genes},
  volume    = {13},
  journal   = {Genes},
  number    = {1},
  issn      = {2073-4425},
  doi       = {10.3390/genes13010093},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-252346},
  year      = {2021},
  abstract  = {Attention-deficit hyperactivity disorder (ADHD) is a complex neurodevelopmental disorder characterized by hyperactivity, impulsivity, and/or inattention, which are symptoms also observed in many rare genetic disorders. We searched for genes involved in Mendelian disorders presenting with ADHD symptoms in the Online Mendelian Inheritance in Man (OMIM) database, to curate a list of new candidate risk genes for ADHD. We explored the enrichment of functions and pathways in this gene list, and tested whether rare or common variants in these genes are associated with ADHD or with its comorbidities. We identified 139 genes, causal for 137 rare disorders, mainly related to neurodevelopmental and brain function. Most of these Mendelian disorders also present with other psychiatric traits that are often comorbid with ADHD. Using whole exome sequencing (WES) data from 668 ADHD cases, we found rare variants associated with the dimension of the severity of inattention symptoms in three genes: KIF11, WAC, and CRBN. Then, we focused on common variants and identified six genes associated with ADHD (in 19,099 cases and 34,194 controls): MANBA, UQCC2, HIVEP2, FOPX1, KANSL1, and AUH. Furthermore, HIVEP2, FOXP1, and KANSL1 were nominally associated with autism spectrum disorder (ASD) (18,382 cases and 27,969 controls), as well as HIVEP2 with anxiety (7016 cases and 14,475 controls), and FOXP1 with aggression (18,988 individuals), which is in line with the symptomatology of the rare disorders they are responsible for. In conclusion, inspecting Mendelian disorders and the genes responsible for them constitutes a valuable approach for identifying new risk genes and the mechanisms of complex disorders.},
  language  = {en}
}
@phdthesis{Lueffe2023,
  author    = {L{\"u}ffe, Teresa Magdalena},
  title     = {Behavioral and pharmacological validation of genetic zebrafish models for ADHD},
  doi       = {10.25972/OPUS-25716},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-257168},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2023},
  abstract  = {Attention-deficit/hyperactivity disorder (ADHD) is the most prevalent neurodevelopmental disorder described in psychiatry today. ADHD arises during early childhood and is characterized by an age-inappropriate level of inattention, hyperactivity, impulsivity, and partially emotional dysregulation. Besides, substantial psychiatric comorbidity further broadens the symptomatic spectrum. Despite advances in ADHD research by genetic- and imaging studies, the etiopathogenesis of ADHD remains largely unclear. Twin studies suggest a heritability of 70-80 \% that, based on genome-wide investigations, is assumed to be polygenic and a mixed composite of small and large, common and rare genetic variants. In recent years the number of genetic risk candidates is continuously increased. However, for most, a biological link to neuropathology and symptomatology of the patient is still missing. Uncovering this link is vital for a better understanding of the disorder, the identification of new treatment targets, and therefore the development of a more targeted and possibly personalized therapy. The present thesis addresses the issue for the ADHD risk candidates GRM8, FOXP2, and GAD1. By establishing loss of function zebrafish models, using CRISPR/Cas9 derived mutagenesis and antisense oligonucleotides, and studying them for morphological, functional, and behavioral alterations, it provides novel insights into the candidate's contribution to neuropathology and ADHD associated phenotypes. Using locomotor activity as behavioral read-out, the present work identified a genetic and functional implication of Grm8a, Grm8b, Foxp2, and Gad1b in ADHD associated hyperactivity. Further, it provides substantial evidence that the function of Grm8a, Grm8b, Foxp2, and Gad1b in activity regulation involves GABAergic signaling. Preliminary indications suggest that the three candidates interfere with GABAergic signaling in the ventral forebrain/striatum. However, according to present and previous data, via different biological mechanisms such as GABA synthesis, transmitter release regulation, synapse formation and/or transcriptional regulation of synaptic components. Intriguingly, this work further demonstrates that the activity regulating circuit, affected upon Foxp2 and Gad1b loss of function, is involved in the therapeutic effect mechanism of methylphenidate. Altogether, the present thesis identified altered GABAergic signaling in activity regulating circuits in, presumably, the ventral forebrain as neuropathological underpinning of ADHD associated hyperactivity. Further, it demonstrates altered GABAergic signaling as mechanistic link between the genetic disruption of Grm8a, Grm8b, Foxp2, and Gad1b and ADHD symptomatology like hyperactivity. Thus, this thesis highlights GABAergic signaling in activity regulating circuits and, in this context, Grm8a, Grm8b, Foxp2, and Gad1b as exciting targets for future investigations on ADHD etiopathogenesis and the development of novel therapeutic interventions for ADHD related hyperactivity. Additionally, thigmotaxis measurements suggest Grm8a, Grm8b, and Gad1b as interesting candidates for prospective studies on comorbid anxiety in ADHD. Furthermore, expression analysis in foxp2 mutants demonstrates Foxp2 as regulator of ADHD associated gene sets and neurodevelopmental disorder (NDD) overarching genetic and functional networks with possible implications for ADHD polygenicity and comorbidity. Finally, with the characterization of gene expression patterns and the generation and validation of genetic zebrafish models for Grm8a, Grm8b, Foxp2, and Gad1b, the present thesis laid the groundwork for future research efforts, for instance, the identification of the functional circuit(s) and biological mechanism(s) by which Grm8a, Grm8b, Foxp2, and Gad1b loss of function interfere with GABAergic signaling and ultimately induce hyperactivity.},
  language  = {en}
}
@article{MichelSoellMolitor2022,
  author    = {Michel, Eva and S{\"o}ll, Lena and Molitor, Sabine},
  title     = {Die Rolle elternbeurteilter exekutiver Funktionen zur Schulleistungsprognose},
  series = {Lernen und Lernst{\"o}rungen},
  volume    = {11},
  journal   = {Lernen und Lernst{\"o}rungen},
  number    = {1},
  issn      = {2235-0977},
  doi       = {10.1024/2235-0977/a000334},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-231575},
  pages     = {43-54},
  year      = {2022},
  abstract  = {Einleitung: Unter dem Begriff exekutive Funktionen (EF) werden h{\"a}ufig die Komponenten Inhibition, kognitive Flexibilit{\"a}t und Aktualisierung von Arbeitsged{\"a}chtnisrepr{\"a}sentationen subsumiert. EF sind bereichs{\"u}bergreifende Pr{\"a}diktoren schulischer Leistungen. Verschiedene Operationalisierungen derselben Komponente, z.B. Performanztests und Elterneinsch{\"a}tzungen, zeigen h{\"a}ufig nur geringe Interkorrelationen. Die Methoden scheinen unterschiedliche Aspekte einer Komponente zu erfassen, daher k{\"o}nnte eine Kombination zur Vorhersage schulischer Leistungen sinnvoll sein. Methode: N = 96 Erst- und Zweitkl{\"a}ssler_innen mit und ohne Entwicklungsauff{\"a}lligkeiten wurden mittels EF-Performanztests und Schulleistungstests zu Mathematik und Lesen untersucht. Per Fragebogen wurden elternbeurteilte EF und als Kontrollvariablen der sozio{\"o}konomische Status (S{\"O}S) und das Vorliegen von Merkmalen einer Aufmerksamkeitsdefizit-Hyperaktivit{\"a}tsst{\"o}rung (ADHS) erfasst. Ergebnisse: Elternbeurteilungen hatten {\"u}ber die Performanztests hinaus einen bedeutsamen Vorhersagewert f{\"u}r die Mathematik- und Leseleistung. Der Einfluss von Alter, S{\"O}S und ADHS-Merkmalen wurde kontrolliert. Diskussion: Die kombinierte Anwendung beider Erfassungsmethoden scheint somit vorteilhaft f{\"u}r die Prognose schulischer Leistungen und die Pr{\"a}vention von Schulleistungsproblemen.},
  language  = {de}
}
@article{PalladinoChiocchettiFranketal.2020,
  author    = {Palladino, Viola Stella and Chiocchetti, Andreas G. and Frank, Lukas and Haslinger, Denise and McNeill, Rhiannon and Radtke, Franziska and Till, Andreas and Haupt, Simone and Br{\"u}stle, Oliver and G{\"u}nther, Katharina and Edenhofer, Frank and Hoffmann, Per and Reif, Andreas and Kittel-Schneider, Sarah},
  title     = {Energy metabolism disturbances in cell models of PARK2 CNV carriers with ADHD},
  series = {Journal of Clinical Medicine},
  volume    = {9},
  journal   = {Journal of Clinical Medicine},
  number    = {12},
  issn      = {2077-0383},
  doi       = {10.3390/jcm9124092},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220074},
  year      = {2020},
  abstract  = {The main goal of the present study was the identification of cellular phenotypes in attention-deficit-/hyperactivity disorder (ADHD) patient-derived cellular models from carriers of rare copy number variants (CNVs) in the PARK2 locus that have been previously associated with ADHD. Human-derived fibroblasts (HDF) were cultured and human-induced pluripotent stem cells (hiPSC) were reprogrammed and differentiated into dopaminergic neuronal cells (mDANs). A series of assays in baseline condition and in different stress paradigms (nutrient deprivation, carbonyl cyanide m-chlorophenyl hydrazine (CCCP)) focusing on mitochondrial function and energy metabolism (ATP production, basal oxygen consumption rates, reactive oxygen species (ROS) abundance) were performed and changes in mitochondrial network morphology evaluated. We found changes in PARK2 CNV deletion and duplication carriers with ADHD in PARK2 gene and protein expression, ATP production and basal oxygen consumption rates compared to healthy and ADHD wildtype control cell lines, partly differing between HDF and mDANs and to some extent enhanced in stress paradigms. The generation of ROS was not influenced by the genotype. Our preliminary work suggests an energy impairment in HDF and mDAN cells of PARK2 CNV deletion and duplication carriers with ADHD. The energy impairment could be associated with the role of PARK2 dysregulation in mitochondrial dynamics.},
  language  = {en}
}
@article{BaaderKianiBrunkhorstKanaanetal.2020,
  author    = {Baader, Anna and Kiani, Behnaz and Brunkhorst-Kanaan, Nathalie and Kittel-Schneider, Sarah and Reif, Andreas and Grimm, Oliver},
  title     = {A within-sample comparison of two innovative neuropsychological tests for assessing ADHD},
  series = {Brain Sciences},
  volume    = {11},
  journal   = {Brain Sciences},
  number    = {1},
  issn      = {2076-3425},
  doi       = {10.3390/brainsci11010036},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-220089},
  year      = {2020},
  abstract  = {New innovative neuropsychological tests in attention deficit hyperactivity disorder ADHD have been proposed as objective measures for diagnosis and therapy. The current study aims to investigate two different commercial continuous performance tests (CPT) in a head-to-head comparison regarding their comparability and their link with clinical parameters. The CPTs were evaluated in a clinical sample of 29 adult patients presenting in an ADHD outpatient clinic. Correlational analyses were performed between neuropsychological data, clinical rating scales, and a personality-based measure. Though inattention was found to positively correlate between the two tests (r = 0.49, p = 0.01), no association with clinical measures and inattention was found for both tests. While hyperactivity did not correlate between both tests, current ADHD symptoms were positively associated with Nesplora Aquarium's motor activity (r = 0.52 to 0.61, p < 0.05) and the Qb-Test's hyperactivity (r = 0.52 to 0.71, p < 0.05). Conclusively, the overall comparability of the tests was limited and correlation with clinical parameters was low. While our study shows some interesting correlation between clinical symptoms and sub-scales of these tests, usage in clinical practice is not recommended.},
  language  = {en}
}
@phdthesis{Keleş2022,
  author    = {Kele{\c{s}}, Can-Florian},
  title     = {Funktionelle Untersuchung zur Duplikation des SLC2A3-Gens in Patienten mit Aufmerksamkeitsdefizit-/Hyperaktivit{\"a}tsst{\"o}rung},
  doi       = {10.25972/OPUS-27161},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-271611},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2022},
  abstract  = {Zusammenfassung 1) Fragestellung und zentrale Untersuchung Unter der Hypothese, dass die Transportrate des Glukosetransporters Typ 3 (GLUT3) abh{\"a}ngig von der Kopienanzahl (CNV) des f{\"u}r ihn kodierenden Gens SLC2A3 ist, wurden Zelllinien mit drei Kopien (Duplikation) mit Kontroll-Zelllinien mit nur zwei Kopien bez{\"u}glich ihrer Glukoseaufnahme miteinander verglichen (n=2; N=9). Hierzu wurde die zellul{\"a}re Glukoseaufnahme mittels radioaktiv markierter 2-Desoxyglukose in via Eppstein-Barr-Virus immortalisierten lymphoblastoiden Zelllinien (EBV-LCLs) gemessen. In den initialen Untersuchungen zeigt sich, dass das Protokoll an manchen Stellen zu viel Spielraum l{\"a}sst. Die Methode wird daraufhin standardisiert und bez{\"u}glich einiger Parameter angepasst: g-Zentrifugeneinstellung, Mischen/Aliquotieren, Zellanzahl, Replikatanzahl, Inkubationszeit/-intervalle und Durchf{\"u}hrungsdauer. 2) Wichtigste Ergebnisse Die funktionelle Untersuchung zur Duplikation des SLC2A3-Gens in Patienten mit Aufmerksamkeitsdefizit-/Hyperaktivit{\"a}tsst{\"o}rung (ADHS) zeigt schließlich im dynamischen Aushungerungsversuch der EBV-LCLs {\"u}ber vier Tage (Vergleich t2 zu t1) statistisch f{\"u}r die Gruppen eine deutliche Differenz mit mittlerer Effektst{\"a}rke (Lineares Gemischtes Modell; p = 0,06; Cohens d = 0,37). Zum zweiten Messzeitpunkt (t2) zeigt sich statistisch zwischen den Gruppen eine sehr signifikante Differenz mit hoher Effektst{\"a}rke (Lineares Gemischtes Modell; p < 0,006; Cohens d = 0,55). Damit konnte in dieser Arbeit nachgewiesen werden, dass die SLC2A3-Duplikation neben dem Gendosiseffekt auf mRNA-Ebene auch hypermorph funktionelle Ver{\"a}nderungen auf zellul{\"a}rer Ebene nach sich zieht. Nachfolgende Untersuchungen sollten vor diesem Hintergrund m{\"o}gliche Kofaktoren investigieren und auf Alterationen in nachgeschalteten Signalwegen abzielen.},
  subject      = {Genemutation},
  language  = {de}
}
@phdthesis{Nachtigall2022,
  author    = {Nachtigall, Lea},
  title     = {Vergleichende Untersuchung der Beeintr{\"a}chtigung der Gesundheit und Arbeitsf{\"a}higkeit von Eltern mit Kindern, welche an ADHS leiden, gegen{\"u}ber einer Stichprobe von Eltern mit unauff{\"a}lligen Kindern},
  doi       = {10.25972/OPUS-25949},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-259495},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2022},
  abstract  = {In der dargestellten Arbeit wurden verschiedene Hypothesen im Hinblick auf die berufliche und gesundheitliche Belastung von Eltern mit Kindern, die an ADHS leiden, untersucht. So wurde zun{\"a}chst der Fragestellung nachgegangen, in wieweit das von ADHS betroffene Kind in der Familie selbst zu einer erh{\"o}hten Belastung der Eltern am Arbeitsplatz und somit zu einer gesteigerten gesundheitlichen Einschr{\"a}nkung f{\"u}hrt. Zudem untersuchten wir die Auswirkungen einer m{\"o}glichen eigenen ADHS-Symptomatik in der Kindheit laut WURS auf die gesundheitliche Verfassung und die Leistungsf{\"a}higkeit am Arbeitsplatz. Schließlich wurde in der dritten Hypothese die Frage untersucht, in wieweit ein Effekt der Anzahl betroffener Kinder mit ADHS innerhalb einer Familie feststellbar ist. Entsprechend wurde eine vergleichende Untersuchung mit einer klinischen Stichprobe (n=91) und einer gesunden Vergleichsstichprobe (n=198) durchgef{\"u}hrt. Um die verschiedenen Einflussfaktoren verifizierbar zu machen, wurden verschiedene Untersuchungsinstrumente in Form von Frageb{\"o}gen sowohl an die klinische Stichprobe als auch an die Vergleichsstichprobe (Familien, deren Kinder als gesund beschrieben wurden) verteilt. Zur allgemeinen Einsch{\"a}tzung von Verhaltensauff{\"a}lligkeiten der Kinder in den jeweiligen Familien wurde die Child-Behavior-Checklist von den Eltern ausgef{\"u}llt. Zudem sch{\"a}tzten die Eltern {\"u}ber den Fremdbeurteilungsbogen f{\"u}r hyperkinetische St{\"o}rungen die ADHS-Symptomatik ihrer Kinder ein. Dar{\"u}ber hinaus beurteilten die Eltern eine m{\"o}gliche eigene ADHS-Symptomatik in der Kindheit {\"u}ber die retrospektiv ausgelegte Wender Utah Rating Scale. Der individuelle Gesundheitszustand der V{\"a}ter und M{\"u}tter wurde {\"u}ber den „EQ-5D" erfragt, w{\"a}hrend die Belastung am Arbeitsplatz mittels der Work Limitation Questionnaire ermittelt wurde. Schließlich f{\"u}llten alle teilnehmenden Eltern einen sozio{\"o}konomischen Fragebogen aus, in dem Alter, Geschlecht, Familienstand, Schulabschluss und das Haushaltsnettoeinkommen ber{\"u}cksichtigt wurden. In zahlreichen, im Diskussionsteil bereits erw{\"a}hnten Studien wurde eine Mehrbelastung der Eltern festgestellt. In der vorliegenden Arbeit wurden dar{\"u}ber hinaus die konkreten Auswirkungen dieser bereits festgestellten Mehrbelastung auf den Gesundheitszustand und das berufliche Umfeld untersucht. Die Untersuchung dieser Auswirkungen auf das allt{\"a}gliche Leben der betroffenen Eltern geriet bislang kaum in den Fokus wissenschaftlicher Arbeiten. Um zuk{\"u}nftig betroffene Familien gezielter in unterschiedlichen Lebensbereichen unterst{\"u}tzen zu k{\"o}nnen ist es jedoch von eminenter Bedeutung, diese Auswirkungen zu kennen und besser zu verstehen. In den Ergebnissen konnte konkret gezeigt werden, dass bez{\"u}glich der Hypothese 1 die Anwesenheit eines ADHS-Kindes innerhalb einer Familie den Gesundheitszustand der Eltern laut Selbsturteil im EQ-5D signifikant beeinflusst. Im Rahmen der beruflichen Belastung war feststellbar, dass ein ADHS-Kind sich signifikant auf die physische Konstitution laut WLQ der Eltern auswirkt. Die Untersuchung der Hypothese II ergab, dass eine m{\"o}gliche eigene ADHS-Symptomatik in der Kindheit sich auf unterschiedliche Dimensionen im beruflichen Umfeld auswirkt, jedoch nicht signifikant auf den individuellen Gesundheitszustand. V{\"a}ter und M{\"u}tter, die selbst in ihrer Kindheit ADHS-Symptome angaben, geben eine signifikante Beeintr{\"a}chtigung bez{\"u}glich der mentalen F{\"a}higkeiten, des Zeitmanagements und der allgemeinen Arbeitsproduktivit{\"a}t laut Selbsteinsch{\"a}tzung im WLQ an. Eine physische Einschr{\"a}nkung am Arbeitsplatz laut WLQ war bei den V{\"a}tern signifikant feststellbar, nicht jedoch bei den M{\"u}ttern. Die Ergebnisse der Hypothese III ergaben, dass bez{\"u}glich der Arbeitsf{\"a}higkeit bereits bei einem oder mehr Kindern mit ADHS die kognitiven F{\"a}higkeiten der Eltern am Arbeitsplatz laut WLQ beeintr{\"a}chtigt sind. Gleichermaßen wird die Arbeitsproduktivit{\"a}t bereits bei einem oder mehr von ADHS betroffenen Kindern signifikant beeinflusst. Auf die physische Konstitution der Eltern laut Selbsteinsch{\"a}tzung im WLQ haben ein oder auch mehrere von ADHS betroffene Kinder jedoch keinen signifikanten Einfluss. Die zeitliche Organisation der Eltern am Arbeitsplatz laut WLQ ist folglich bei einem Kind mit ADHS noch nicht signifikant beeintr{\"a}chtigt, wohl aber, wenn mehr als ein Kind betroffen ist. Ebenso ist der Gesundheitszustand der Eltern laut EQ-5D erst ab zwei betroffenen Kindern in einer Familie durch diesen Umstand beeinflusst. Zusammenfassend l{\"a}sst sich also feststellen, dass durch die Anwesenheit eines Kindes mit ADHS in einer Familie eher der Gesundheitszustand der Eltern signifikant beeinflusst wird, wohingegen die eigene ADHS-Symptomatik der Eltern in der Kindheit viel mehr zu einer signifikanten und mehrdimensionalen Beeintr{\"a}chtigung am Arbeitsplatz f{\"u}hrt. Diese Erkenntnis zeigt, dass die eigene ADHS-Symptomatik der Eltern in der Kindheit neben der Anwesenheit eines ADHS - Kindes nicht unerhebliche Auswirkungen auf die allt{\"a}glichen Aufgaben der Betroffenen hat. Die Erkenntnis dieser neuen Zusammenh{\"a}nge sollte in zuk{\"u}nftigen Forschungsvorhaben ber{\"u}cksichtigt werden.},
  subject      = {Aufmerksamkeitsdefizit-Syndrom},
  language  = {de}
}
@article{GrimmWeberKittelSchneideretal.2020,
  author    = {Grimm, Oliver and Weber, Heike and Kittel-Schneider, Sarah and Kranz, Thorsten M. and Jacob, Christian P. and Lesch, Klaus-Peter and Reif, Andreas},
  title     = {Impulsivity and Venturesomeness in an Adult ADHD Sample: Relation to Personality, Comorbidity, and Polygenic Risk},
  series = {Frontiers in Psychiatry},
  volume    = {11},
  journal   = {Frontiers in Psychiatry},
  issn      = {1664-0640},
  doi       = {10.3389/fpsyt.2020.557160},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-219751},
  year      = {2020},
  abstract  = {While impulsivity is a basic feature of attention-deficit/hyperactivity disorder (ADHD), no study explored the effect of different components of the Impulsiveness (Imp) and Venturesomeness (Vent) scale (IV7) on psychiatric comorbidities and an ADHD polygenic risk score (PRS). We used the IV7 self-report scale in an adult ADHD sample of 903 patients, 70\% suffering from additional comorbid disorders, and in a subsample of 435 genotyped patients. Venturesomeness, unlike immediate Impulsivity, is not specific to ADHD. We consequently analyzed the influence of Imp and Vent also in the context of a PRS on psychiatric comorbidities of ADHD. Vent shows a distinctly different distribution of comorbidities, e.g., less anxiety and depression. PRS showed no effect on different ADHD comorbidities, but correlated with childhood hyperactivity. In a complementary analysis using principal component analysis with Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition ADHD criteria, revised NEO Personality Inventory, Imp, Vent, and PRS, we identified three ADHD subtypes. These are an impulsive-neurotic type, an adventurous-hyperactive type with a stronger genetic component, and an anxious-inattentive type. Our study thus suggests the importance of adventurousness and the differential consideration of impulsivity in ADHD. The genetic risk is distributed differently between these subtypes, which underlines the importance of clinically motivated subtyping. Impulsivity subtyping might give insights into the organization of comorbid disorders in ADHD and different genetic background.},
  language  = {en}
}
@article{ZieglerEhlisWeberetal.2021,
  author    = {Ziegler, Georg C. and Ehlis, Ann-Christine and Weber, Heike and Vitale, Maria Rosaria and Z{\"o}ller, Johanna E. M. and Ku, Hsing-Ping and Schiele, Miriam A. and K{\"u}rbitz, Laura I. and Romanos, Marcel and Pauli, Paul and Kalisch, Raffael and Zwanzger, Peter and Domschke, Katharina and Fallgatter, Andreas J. and Reif, Andreas and Lesch, Klaus-Peter},
  title     = {A Common CDH13 Variant is Associated with Low Agreeableness and Neural Responses to Working Memory Tasks in ADHD},
  series = {Genes},
  volume    = {12},
  journal   = {Genes},
  number    = {9},
  issn      = {2073-4425},
  doi       = {10.3390/genes12091356},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-245220},
  year      = {2021},
  abstract  = {The cell—cell signaling gene CDH13 is associated with a wide spectrum of neuropsychiatric disorders, including attention-deficit/hyperactivity disorder (ADHD), autism, and major depression. CDH13 regulates axonal outgrowth and synapse formation, substantiating its relevance for neurodevelopmental processes. Several studies support the influence of CDH13 on personality traits, behavior, and executive functions. However, evidence for functional effects of common gene variation in the CDH13 gene in humans is sparse. Therefore, we tested for association of a functional intronic CDH13 SNP rs2199430 with ADHD in a sample of 998 adult patients and 884 healthy controls. The Big Five personality traits were assessed by the NEO-PI-R questionnaire. Assuming that altered neural correlates of working memory and cognitive response inhibition show genotype-dependent alterations, task performance and electroencephalographic event-related potentials were measured by n-back and continuous performance (Go/NoGo) tasks. The rs2199430 genotype was not associated with adult ADHD on the categorical diagnosis level. However, rs2199430 was significantly associated with agreeableness, with minor G allele homozygotes scoring lower than A allele carriers. Whereas task performance was not affected by genotype, a significant heterosis effect limited to the ADHD group was identified for the n-back task. Heterozygotes (AG) exhibited significantly higher N200 amplitudes during both the 1-back and 2-back condition in the central electrode position Cz. Consequently, the common genetic variation of CDH13 is associated with personality traits and impacts neural processing during working memory tasks. Thus, CDH13 might contribute to symptomatic core dysfunctions of social and cognitive impairment in ADHD.},
  language  = {en}
}