Faculty Bibliography

Studies have reported associations between cortical thickness (CT) and socioeconomic status (SES), as well as between CT and cognitive outcomes. However, findings have been mixed as to whether CT explains links between SES and cognitive performance. In the current study, we hypothesized that this inconsistency may have arisen from the fact that socioeconomic factors (family income and parental education) may moderate the relation between CT and neurocognitive skills. Results indicated that associations between CT and cognitive performance did vary by SES for both language and executive function (EF) abilities. Across all ages, there was a negative correlation between CT and cognitive skills, with thinner cortices associated with higher language and EF scores. Similarly, across all cognitive skills, children from higher-SES homes outperformed their age-matched peers from lower-SES homes. Moderation analyses indicated that the impact of SES was not constant across CT, with SES more strongly predictive of EF skills among children with thicker cortices and more strongly predictive of language skills among children with thinner cortices. This suggests that socioeconomic advantage may in some cases buffer against a neurobiological risk factor for poor performance. These findings suggest that links between brain structure and cognitive processes vary by family socioeconomic circumstance.

The purpose of this longitudinal study was to examine the relations of early socialization of anger with change in adolescent depression, and moderation by child anger. Using a sample of low-income, ethnic minority children at familial risk for psychopathology in the United States (n = 92; ages 3-5; 53% female; 65% African American; 27% Latina/o), early anger socialization (i.e., parent response to child anger) was tested as a predictor of change in depression from preadolescence to adolescence [i.e., age 8 (n = 63), 11 (n = 58), and 13 (n = 44)]. A videotaped parent-child interaction was coded for parental socialization of preschooler anger, and psychiatric interviews of depression were conducted three times across preadolescence and adolescence. Major depression diagnoses increased from preadolescence to adolescence. Latent growth modeling indicated parent discouragement of child anger was a significant predictor of an increase in the child's later depression from preadolescence to adolescence, and child anger intensity was a significant moderator.

Objective/UNASSIGNED:To identify factors associated with early initiation and achievement of therapeutic hypothermia (TH) in newborns with hypoxic-ischemic encephalopathy (HIE). Methods/UNASSIGNED:Retrospective cohort study of newborns who received TH according to National Institute of Child Health and Human Development (NICHD) criteria in two academic level 3 Neonatal Intensive Care Units (NICU) between 2009 and 2013. All infants were transported by a neonatal transport team (NNTT). Multivariate linear regression including who initiated cooling and degree of resuscitation in the model was performed. Results/UNASSIGNED:Two hundred and seven infants were included. Waiting for advice from a tertiary care NICU was independently associated with a 50 minute delay in the median time of initiation of TH. The need for extensive resuscitation (cardiopulmonary resuscitation [CPR] or epinephrine) was independently associated with a reduction of 43 minutes in the median time to reach target core temperature. Log-transformed time to initiation of TH was associated with time to reach target core temperature (P<0.001). A doubling of time to initiation of TH corresponds to a 24% (95% CI 18% to 30%) increase in median time to reach target core temperature. Conclusions/UNASSIGNED:Initiating passive cooling at the referring centre, before transfer, is critical to faster achievement of target core temperature in asphyxiated infants. Greater outreach education and development of clinical care pathways are needed to improve optimal delivery of TH to enhance outcome.

Contrary to the "model minority" myth, Asian American children, especially those from low-income immigrant families, are at risk for both behavioral and emotional problems early in life. Little is known, however, about the underlying developmental mechanisms placing Asian American children at risk, including the role of cultural adaptation and parenting. This study examined cultural adaptation, parenting practices and culture related parenting values and child mental health in a sample of 157 English speaking Asian American immigrant families of children enrolled in early childhood education programs in low-income, urban neighborhoods. Overall, cultural adaptation and parenting cultural values and behaviors were related to aspects of child mental health in meaningful ways. Parents' cultural value of independence appears to be especially salient (e.g., negatively related to behavior problems and positively related to adaptive behavior) and significantly mediates the link between cultural adaptation and adaptive behavior. Study findings have implications for supporting Asian American immigrant families to promote their young children's mental health.

PURPOSE/BACKGROUND: Deficits in N-methyl-D-aspartate receptor (NMDAR) function contribute to symptoms and cognitive dysfunction in schizophrenia and are associated with impaired generation of event-related potential measures including auditory mismatch negativity. Parallel studies of the NMDAR agonist d-serine have suggested that sensitivity of these measures to glutamate-based interventions is related to symptomatic and cognitive response. Bitopertin is a selective inhibitor of glycine transport. This study investigates effects of bitopertin on NMDAR-related event-related potential deficits in schizophrenia. METHODS/PROCEDURES: Patients with schizophrenia/schizoaffective disorder were treated with bitopertin (10 mg, n = 29), in a double-blind, parallel group investigation. Auditory mismatch negativity served as primary outcome measures. Secondary measures included clinical symptoms and neurocognitive performance. FINDINGS/RESULTS: No significant changes were seen with bitopertin for neurophysiological, clinical, or neurocognitive assessments. IMPLICATIONS/CONCLUSIONS: These findings represent the first assessment of the effect of bitopertin on neurophysiological biomarkers. Bitopertin did not significantly affect either symptoms or NMDAR-related biomarkers at the dose tested (10 mg). Mismatch negativity showed high test-retest reliability, supporting its use as a target engagement measure.

AIM: This proof-of-concept study examined if early trauma influences features of schizophrenia, consistent with hypothalamic-pituitary-adrenal (HPA) axis activation. METHODS: Early trauma and current perceived stress were assessed in 28 treated schizophrenia cases, along with salivary cortisol, brain volumes, cognition and symptoms. RESULTS: Early trauma predicted more positive (r = .66, P = .005) and dysthymia symptoms (r -.65, P = .007), but less negative symptoms (r = -.56, P = .023), as well as reduced whole brain volumes (r = .50, P = .040) and increased amygdala to whole brain volume ratios (r = .56, P = .018). Larger volume reductions accompanied cortisol levels: evening values predicted smaller whole brain and hippocampal volumes whereas afternoon levels only significantly predicted smaller brain volumes in women. Sex differences were demonstrated between early trauma and cognition, with better cognition in traumatized women than other women and no male effects. Current perceived stress was related to dysthymia (especially in women) and diminished sense of purpose and social drive (especially in men). CONCLUSIONS: These results suggest that early trauma and current stress impact features of schizophrenia, consistent with stress sensitization and increased dopamine activity for treatment refractory positive symptoms, as well as the cascade of increased morning cortisol, reduced brain volumes, and depressive and deficit symptoms. Conversely, cognitive deficits and negative symptoms may arise from a distinct diathesis. The sex differences accord with the literature on human HPA function and stress responses. Early trauma may be a stressor in the aetiopathophysiology of schizophrenia, particularly for cases with treatment refractory positive symptoms, and may guide future treatment development.

Approximately 30% of individuals with autism spectrum disorder (ASD) have elevated whole blood serotonin (5-HT) levels. Genetic linkage and association studies of ASD and of whole blood 5-HT levels as a quantitative trait have revealed sexual dimorphism. Few studies have examined the presence of a sex difference on hyperserotonemia within ASD. To assess whether the rate of hyperserotonemia is different in males than in females with ASD, we measured whole blood 5-HT levels in 292 children and adolescents with ASD, the largest sample in which this biomarker has been assessed. Based upon previous work suggesting that hyperserotonemia is more common prior to puberty, we focused our analysis on the 182 pre-pubertal children with ASD. 42% of pre-pubertal participants were within the hyperserotonemia range. In this population, we found that males were significantly more likely to manifest hyperserotonemia than females (P = 0.03). As expected, no significant difference was found in the post-pubertal population. Additional work will be needed to replicate this intriguing finding and to understand whether it could potentially explain differences in patterns of ASD risk between males and females. Autism Res 2017, 10: 1417-1423. © 2017 International Society for Autism Research, Wiley Periodicals, Inc.

This study focused on social support and its association with child developmental outcomes, indirectly through parenting practices, in families of 4-5 year old Latino children. Data were collected from mothers and teachers of 610 Mexican American (MA) and Dominican American (DA) children. Mothers reported on perceived social support, parenting practices and children's problem and adaptive behavior functioning at home, and teachers reported on mothers' parent involvement and children's problem and adaptive behavior functioning in the classroom. Results showed that support received from family was higher than support received from school networks for both ethnic groups. Moreover, familial support was associated with child behavior, mediated by positive parenting practices, whereas support from school networks was not associated with child outcomes. During early childhood, social support from family members may be an important protective factor that can promote positive behavioral functioning among Latino children.

Restless legs syndrome (RLS) is a relatively common neurological disorder in childhood, although it is usually overlooked due to the atypical presentation in children and associated comorbid conditions that may affect its clinical presentation. Here, we aimed to perform, for the first time, a systematic review of studies reporting the association between RLS in children and adolescents (<18 y) and somatic or neuropsychiatric conditions. We searched for peer-reviewed studies in PubMed, Ovid (including PsycINFO, Ovid MEDLINE(R), and Embase), Web of Knowledge (Web of Science, Biological abstracts, BIOSIS, FSTA) through November 2015, with no language restrictions. We found 42 pertinent studies. Based on the retrieved studies, we discuss the association between RLS and a number of conditions, including growing pains, kidney disease, migraine, diabetes, epilepsy, rheumatologic disorders, cardiovascular disease, liver and gastrointestinal disorders, and neuropsychiatric disorders (e.g., attention deficit hyperactivity disorder (ADHD), depression, and conduct disorder). Our systematic review provides empirical evidence supporting the notion that RLS in children is comorbid with a number of somatic and neuropsychiatric conditions. We posit that the awareness on comorbid diseases/disorders is pivotal to improve the diagnosis and management of RLS and might suggest fruitful avenues to elucidate the pathophysiology of RLS in children.

We examined global and local visual processing in autism spectrum disorder (ASD) via a match-to-sample task using Kanizsa illusory contours (KIC). School-aged children with ASD (n = 28) and age-matched typically developing controls (n = 22; 7-13 years) performed a sequential match-to-sample between a solid shape (sample) and two illusory alternatives. We tracked eye gaze and behavioral performance in two task conditions: one with and one without local interference from background noise elements. While analyses revealed lower accuracy and longer reaction time in ASD in the condition with local interference only, eye tracking robustly captured ASD-related global atypicalities across both conditions. Specifically, relative to controls, children with ASD showed decreased fixations to KIC centers, indicating reduced global perception. Notably, they did not differ from controls in regard to fixations to local elements or touch response location. These results indicate impaired global perception in the absence of heightened local processing in ASD. They also underscore the utility of eye-tracking measures as objective indices of global/local visual processing strategies in ASD. Autism Res 2017. (c) 2017 International Society for Autism Research, Wiley Periodicals, Inc.