COMT Val158Met polymorphism and socioeconomic status interact to predict attention deficit/hyperactivity problems in children aged 10–14

The functional Val158Met COMT polymorphism appears to affect a host of behaviours mediated by the pre-frontal cortex, and has been found associated to the risk for disruptive behaviours including ADHD. Parental socioeconomic status (SES) has also been reported as a predictor for the same childhood disorders. In a general population sample of 575 Italian pre-adolescents aged 10–14, we examined the association of the functional Val158Met COMT polymorphism and SES—both as linear and interactive effects—with oppositional defiant problems, conduct problems, and attention deficit/hyperactivity problems, as defined by the newly established Child Behaviour Check-List/6-18 DSM oriented scales. Multivariate- and subsequent univariate-analysis of covariance showed a significant association of COMT × SES interaction with CBCL 6/18 DOS attention deficit/hyperactivity problems (p = 0.004), and revealed higher scores among those children with Val/Val COMT genotype who belonged to low-SES families. We also found a significant association of SES with attention deficit/hyperactivity problems and conduct problems DOS (p = 0.04 and 0.01, respectively). Our data are consistent with a bulk of recent literature suggesting a role of environmental factors in moderating the contribution of specific genetic polymorphisms to human variability in ADHD. While future investigations will refine and better clarify which specific environmental and genetic mechanisms are at work in influencing the individual risk to ADHD in pre-adolescence, these data may contribute to identify/prevent the risk for ADHD problems in childhood

Contribution of SNP arrays in diagnosis of deletion 2p11.2-p12

Deletions of the short arm of chromosome 2 are exceedingly rare, having been reported in few patients. Fur- thermore most cases with deletion in 2p11.2\u2013p12 have been studied using standard karyotype and so it is not possible to delineate the precise size of deletions. Here, we describe a 9-year-old girl with a 9.4 Mb de novo interstitial deletion of region 2p11.2\u2013p12 identified by SNP array analysis. The deleted region encompasses over 40 known genes, including LRRTM1, CTNNA2 and REEP1, haploinsuffi- ciency of which could explain some clinical features of this patient such as mental retardation, speech delay and gait abnormalities. A comparison of our case with previously reported patients who present deletions in 2p11.2\u2013p12 was carried out. Our case adds new information to the deletion of 2p11.2\u2013p12, improving the knowledge on this rearrangement

Prevalence and correlates of mental disorders among adolescents in Italy: the PrISMA study

Background While in the last 5 years several studies have been conducted in Italy on the prevalence of mental disorders in adults, to date no epidemiological study has been targeted on mental disorders in adolescents. Method A two-phase study was conducted on 3,418 participants using the child behavior checklist/6-18 (CBCL) and the development and well-being assessment (DAWBA), a structured interview with verbatim reports reviewed by clinicians. Results The prevalence of CBCL caseness and DSM-IV disorders was 9.8% (CI 8.8-10.8%) and 8.2% (CI 4.2-12.3%), respectively. DSM-IV Emotional disorders were more frequently observed (6.5% CI 2.2-10.8%) than externalizing disorders (1.2% CI 0.2-2.3%). In girls, prevalence estimates increased significantly with age; furthermore, living with a single parent, low level of maternal education, and low family income were associated with a higher likelihood of suffering from emotional or behavioral problems. Conclusions Approximately one in ten adolescents has psychological problems. Teachers and clinicians should focus on boys and girls living with a single parent and/or in disadvantaged socioeconomic conditions