A High Threshold of Biotherapeutic Aggregate Numbers is Needed to Induce an Immunogenic Response In Vitro, In Vivo, and in the Clinic

BACKGROUND AND PURPOSE

There is concern that subvisible aggregates in biotherapeutic drug products pose a risk to patient safety. We investigated the threshold of biotherapeutic aggregates needed to induce immunogenic responses.

METHODS AND RESULTS

Highly aggregated samples were tested in cell-based assays and induced cellular responses in a manner that depended on the number of particles. The threshold of immune activation varied by disease state (cancer, rheumatoid arthritis, allergy), concomitant therapies, and particle number. Compared to healthy donors, disease state patients showed an equal or lower response at the late phase (7 days), suggesting they may not have a higher risk of responding to aggregates. Xeno-het mice were used to assess the threshold of immune activation in vivo. Although highly aggregated samples (~ 1,600,000 particles/mL) induced a weak and transient immunogenic response in mice, a 100-fold dilution of this sample (~ 16,000 particles/mL) did not induce immunogenicity. To confirm this result, subvisible particles (up to ~ 18,000 particles/mL, containing aggregates and silicone oil droplets) produced under representative administration practices (created upon infusion of a drug product through an IV catheter) did not induce a response in cell-based assays or appear to increase the rate of adverse events or immunogenicity during phase 3 clinical trials.

CONCLUSION

The ability of biotherapeutic aggregates to elicit an immune response in vitro, in vivo, and in the clinic depends on high numbers of particles. This suggests that there is a high threshold for aggregates to induce an immunogenic response which is well beyond that seen in standard biotherapeutic drug products.

Measurement of adolescent psychological wellbeing: A test of factor structure and measurement invariance

Gains in holistic approaches to adult mental health have been associated with increasing interest in understanding psychological wellbeing (PWB) among adolescents. Empirical examination of measurement models for PWB in adolescence is lacking. Thus, the current study examined PWB in a longitudinal, diverse sample of 433 adolescents (non-Latinx Black: 37.6%; non-Latinx White: 25.9%; Latinx: 36.5%; Male adolescents: 50.1%). A one-factor, correlated six-factor and hierarchical models were examined across racial/ethnic (White, Black, and Hispanic) and gender (female, male) identities, after which the best fitting model was selected to undergo invariance testing. A one-factor structure was superior, and exhibited strict invariance across racial/ethnic and gender identities at each wave of the study, as well as longitudinal invariance within the entire sample.

Interpersonal Well-Being and Suicidal Outcomes in a Nationally Representative Study of Adolescents: A Translational Study

Adolescent suicide continues to rise despite burgeoning research on interpersonal risk for suicide. This may reflect challenges in applying developmental psychopathology research into clinical settings. In response, the present study used a translational analytic plan to examine indices of social well-being most accurate and statistically fair for indexing adolescent suicide. Data from the National Comorbidity Survey Replication Adolescent Supplement were used. Adolescents aged 13-17 (N = 9,900) completed surveys on traumatic events, current relationships, and suicidal thoughts and attempts. Both frequentist (e.g., receiver operating characteristics) and Bayesian (e.g., Diagnostic Likelihood Ratios; DLRs) techniques provided insight into classification, calibration, and statistical fairness. Final algorithms were compared to a machine learning-informed algorithm. Overall, parental care and family cohesion best classified suicidal ideation, while these indices and school engagement best classified attempts. Multi-indicator algorithms suggested adolescents at high risk across these indices were approximately 3-times more likely to engage in ideation (DLR = 3.26) and 5-times more likely to engage in attempts (DLR = 4.53). Although equitable for attempts, models for ideation underperformed in non-White adolescents. Supplemental, machine learning-informed algorithms performed similarly, suggesting non-linear and interactive effects did not improve model performance. Future directions for interpersonal theories for suicide are discussed and clinical implications for suicide screening are demonstrated.

Quantitative measurement of the requirement of diverse protein degradation pathways in MHC class I peptide presentation

Peptides from degradation of intracellular proteins are continuously displayed by major histocompatibility complex (MHC) class I. To better understand origins of these peptides, we performed a comprehensive census of the class I peptide repertoire in the presence and absence of ubiquitin-proteasome system (UPS) activity upon developing optimized methodology to enrich for and quantify these peptides. Whereas most class I peptides are dependent on the UPS for their generation, a surprising 30%, enriched in peptides of mitochondrial origin, appears independent of the UPS. A further ~10% of peptides were found to be dependent on the proteasome but independent of ubiquitination for their generation. Notably, clinically achievable partial inhibition of the proteasome resulted in display of atypical peptides. Our results suggest that generation of MHC class I•peptide complexes is more complex than previously recognized, with UPS-dependent and UPS-independent components; paradoxically, alternative protein degradation pathways also generate class I peptides when canonical pathways are impaired.

Testing the temporal precedence of family functioning and child psychopathology in the LONGSCAN sample

Family functioning may serve as protective or risk factors in the development of youth psychopathology. However, few studies have examined the potentially reciprocal relation between child psychopathology and family functioning. To fill this gap in the literature, this study tested for time-ordered associations between measures of family functioning (e.g., cohesion, conflict, and emotional expressiveness) and child psychopathology (e.g., total behavior problems, externalizing, and internalizing problems) using data from the Longitudinal Studies of Child Abuse and Neglect (LONGSCAN; N = 1143, 52.3% female, Nwaves = 5). We used a random-intercept cross-lagged panel model to identify whether child psychopathology preceded and predicted family functioning, the reverse, or both processes occurred simultaneously. At the between-person level, families who tended to have more cohesion, who lacked conflict, and who expressed their emotions had lower levels of child psychopathology. At the within-person level in childhood, we found minimal evidence for time-ordered associations. In adolescence, however, a clear pattern whereby early psychopathology consistently predicted subsequent family functioning emerged, and the reverse direction was rarely found. Results indicate a complex dynamic relation between the family unit and child that have important implications for developmental models that contextualize risk and resilience within the family unit.

Recommendations for Imaging of the Temporomandibular Joint. Position Statement from the American Academy of Oral and Maxillofacial Radiology and the American Academy of Orofacial Pain

This position statement was developed by an ad hoc committee of the American Academy of Oral and Maxillofacial Radiology and the American Academy of Orofacial Pain. The committee reviewed the pertinent literature and drafted recommendations for imaging. This joint statement provides evidence-based recommendations and clinical guidance for applying appropriate diagnostic imaging to evaluate the temporomandibular joint (TMJ). This manuscript guides the design of TMJ imaging examinations, addresses in-office CBCT imaging, and provides timely evidence-based recommendations to evaluate the TMJ bony components, also addressing the use of MRI and other modalities to evaluate TMJ involvement in different pathologic conditions.

The role of hopelessness and procedural justice on depressogenic outcomes in serious adolescent offenders

OBJECTIVE

Despite increasing depression and suicide rates in justice-system-involved youth, little is known about depressogenic risk factors in this population. Therefore, we explored how levels of and changes in hopelessness and perceptions of procedural justice predicted depressive and suicidal outcomes in justice-system-involved youth.

HYPOTHESES

We hypothesized that higher levels and increasing trajectories of hopelessness, as well as of perceived injustice, would predict depressive symptoms and suicidal ideation across adolescence and emerging adulthood. We also expected that procedural injustice would explain the relation between hopelessness and these outcomes. Finally, we hypothesized that gender and race/ethnicity would moderate the influence of hopelessness and perceived injustice.

METHOD

Data for the present study were collected as part of the Pathways to Desistance study. In total, 1,354 adolescents (Mage = 16.04 years; 86.4% male; 41.4% non-Hispanic Black, 33.5% Hispanic, 20.2% non-Hispanic White) convicted of serious offenses participated. For the present study, participants answered questions on measures of procedural justice, hopelessness, depression, and suicidal ideation across 11 time points over 7 years.

RESULTS

Using latent growth curve modeling, we found partial support for our hypotheses. Specifically, baseline levels of hopelessness predicted depression levels and increases in depression during adolescence (ps < .01). Further, changes in hopelessness predicted corresponding changes in depression throughout adolescence and emerging adulthood (ps < .001). Similarly, procedural justice levels predicted levels of depression (p < .001), and changes in procedural justice corresponded to changes in depression during emerging adulthood (p = .01). With regard to suicidal ideation, levels of and changes in hopelessness in emerging adulthood predicted corresponding suicidal ideation outcomes (ps ≤ .01). Meanwhile, we found only marginal support for our mediation model (p = .05). Collectively, results did not vary across gender or race/ethnicity.

CONCLUSIONS

Hopelessness and perceived injustice are unique predictors of depression for juvenile-justice-system-involved youth. Preventive interventions targeting both hopelessness and procedural justice could help attenuate elevated depression rates in this population. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Adolescent Loneliness during the COVID-19 Pandemic: The Role of Pre-Pandemic Risk Factors

The COVID-19 pandemic is a global mental health crisis that disproportionately impacts adolescents. Loneliness is a particularly salient pandemic psychosocial outcome to understand; however, research to date on this outcome is sparse and largely cross-sectional. In response, we examined pre-pandemic risk factors for pandemic loneliness. Further, we examined how risk may differ based on key demographics, and whether mediation or moderation models best explained potential disparities in experiencing loneliness. Self-reported, pre-pandemic mental health, trauma exposure, and family conflict survey data were collected at Wave 1 in a diverse sample of 369 adolescents (54.5% female, 45.5% male; 30.1% White; 30.9% Black; 18.4% Hispanic; M_age = 15.04; SD _age  = 1.10). Subsequently, self-reported experiences of loneliness during the pandemic were collected 6 months (April-June 2020) and 12 months (October-December 2020) later. Using a regression-based framework (i.e., PROCESS), we tested (a) which pre-pandemic risks uniquely predicted prospective loneliness and (b) whether loneliness risk was elevated for certain identities (i.e., mediation models) or whether certain identities were more sensitive to specific risks (i.e., moderation models). Overall, pre-pandemic depressive and aggression symptoms predicted early pandemic loneliness (6-month follow-up), whereas anxiety symptoms specifically predicted mid-pandemic loneliness (12-month follow-up). Environmental stressors were moderated by gender, such that females with pre-pandemic trauma exposure were more likely to report pandemic loneliness. Further, pre-pandemic internalizing distress for girls and externalizing symptoms for boys, reflected gender-specific pathways for loneliness. Implications for mental health prevention in the wake of national disasters are discussed.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s12187-022-09984-8.

Engineered IL13 variants direct specificity of IL13Rα2-targeted CAR T cell therapy

IL13Rα2 is an attractive target due to its overexpression in a variety of cancers and rare expression in healthy tissue, motivating expansion of interleukin 13 (IL13)-based chimeric antigen receptor (CAR) T cell therapy from glioblastoma into systemic malignancies. IL13Rα1, the other binding partner of IL13, is ubiquitously expressed in healthy tissue, raising concerns about the therapeutic window of systemic administration. IL13 mutants with diminished binding affinity to IL13Rα1 were previously generated by structure-guided protein engineering. In this study, two such variants, termed C4 and D7, are characterized for their ability to mediate IL13Rα2-specific response as binding domains for CAR T cells. Despite IL13Rα1 and IL13Rα2 sharing similar binding interfaces on IL13, mutations to IL13 that decrease binding affinity for IL13Rα1 did not drastically change binding affinity for IL13Rα2. Micromolar affinity to IL13Rα1 was sufficient to pacify IL13-mutein CAR T cells in the presence of IL13Rα1-overexpressing cells in vitro. Interestingly, effector activity of D7 CAR T cells, but not C4 CAR T cells, was demonstrated when cocultured with IL13Rα1/IL4Rα-coexpressing cancer cells. While low-affinity interactions with IL13Rα1 did not result in observable toxicities in mice, in vivo biodistribution studies demonstrated that C4 and D7 CAR T cells were better able to traffic away from IL13Rα1+ lung tissue than were wild-type (WT) CAR T cells. These results demonstrate the utility of structure-guided engineering of ligand-based binding domains with appropriate selectivity while validating IL13-mutein CARs with improved selectivity for application to systemic IL13Rα2-expressing malignancies.

Is ACEs Screening for Adolescent Mental Health Accurate and Fair?

Increasingly, adversity-focused assessment tools are being introduced into preventive mental health screening protocols. However, few studies have explicitly examined whether use of these instruments serves as equitable, clinically useful measures of mental health risk in adolescents. In response, the present study examined whether an adverse childhood experiences (ACEs) measure was accurate and fair as an index of environmental risk for adolescent mental health diagnoses. Secondary data analyses were conducted on the National Comorbidity Survey-Adolescent Supplement. Adolescents (N = 10,148; Age_Mean = 15.20; 51.3% male; 65.6% White, 15.1% Black, and 14.4% Hispanic) answered ten questions concerning childhood adversities and completed diagnostic interviews for PTSD, depression, and externalizing disorders. In the overall sample, ACEs showed some clinical utility (e.g., area under the curve (AUCs) ≥ 0.64), diagnostic likelihood ratios (DLRs) > 4.0) and acceptable calibration (i.e., expected/observed indices' confidence intervals included 1) across diagnoses. Within subpopulations, however, predictive validity varied. The AUCs were lower for multiple diagnoses in Black male and Hispanic female adolescents and DLRs suggested greater clinical utility for indexing mental health in White, female adolescents. Finally, models were not well-calibrated between adolescent subpopulations, suggesting recommended ACEs screening can potentially produce biased results when used to inform mental health policy and prevention. Reasons for why results from ACEs screening may vary across adolescent subpopulations and the importance of testing statistical fairness for preventive mental health screening are discussed.

Testing the factor structure and measurement invariance of the Temporal Experience of Pleasure Scale in adolescents across time, gender, and race/ethnicity

The Temporal Experience of Pleasure Scale (TEPS) is a self-report measure designed to assess anticipatory and consummatory pleasure, two facets of anhedonic predispositions. Despite its widespread use, the factor structure of the TEPS has yet to be tested in adolescents, who are at increased risk for psychopathology and undergoing rapid changes in reward-related processes. In response, the present study aimed to test the factor structure and measurement invariance of the TEPS across time, gender, and race/ethnicity in a diverse adolescent sample. Adolescents (N = 441; M_age = 14.98; 223 female) who identified as either Black (37%), Hispanic (37%), or White (26%), completed the TEPS at Baseline, 6-month, and 12-month follow-ups. Factor analyses were conducted to examine the factor structure of the TEPS, while configural, metric, scalar, and strict invariance were tested across time and demographics. Findings supported the two-factor structure of the TEPS, above and beyond other conceptualizations (e.g., 4-factor, bifactor), full longitudinal invariance, and partial invariance across gender and race/ethnicity. Examination of mean differences suggested no temporal, gender nor race/ethnic differences for anticipatory pleasure. For consummatory pleasure, no differences were found for gender, but results suggested higher levels over time and lower levels in Black adolescents. Our findings provide preliminary support for reliable cross-group interpretations of anticipatory and consummatory anhedonic predispositions as measured through the TEPS. Together, results provide support for the clinical utility of the TEPS for anhedonic-related psychopathology risk assessment in adolescence. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Childhood Maltreatment and Anhedonic Symptoms: Test of a Dual-risk Model in Emerging Adults

Anhedonia, defined as deficits in positive affect and approach related behaviors, remains an understudied trauma response. As anhedonic responses to interpersonal violence are associated with a more severe course of psychopathology that is more difficult to treat, an increased focus on risk factors for anhedonia is necessary. The present study sought to address this gap in the literature by testing a theoretical model that highlights two transdiagnostic pathways leading to anhedonic responses in emerging adults attending college. Specifically, our study examined how childhood maltreatment subtypes (a) uniquely associate with depressive and post-traumatic stress (PTS) manifestations of anhedonia and (b) how temperament (i.e., anticipatory positive affect) and distress (i.e., negative mood) explain these relations. At baseline, a racially diverse sample of 462 emerging adults (Age_Mean = 19.45; 75.5% female; 45.5% White) completed self-report forms on childhood abuse and neglect, anticipatory positive affect, negative mood, and anhedonia. Individuals completed measures of temperament and psychological distress again 6-weeks, and 12-weeks later. Latent growth curve models were utilized to test our model. Consistent with hypotheses, deficits in anticipatory positive affect uniquely explained the relation between neglect and depressive/PTS anhedonic symptoms. Meanwhile, negative mood mediated the relation between abuse and both forms of anhedonia. These findings support the theory that two separate risk pathways lead to anhedonia. Support for our model suggests that distinguishing between pathways for anhedonic responses may be the key to a more targeted, transdiagnostic, trauma-informed approach for treating and preventing these deleterious, treatment-resistant, internalizing symptoms.

Cardiac autonomic functioning across stress and reward: Links with depression in emerging adults

The autonomic nervous system (ANS) has received much attention as a potential low-cost, peripheral indicator of depression. Despite theoretical support, however, results have been mixed as to whether indices of the ANS reliably index depression. In response, the present study sought to clarify the relation between ANS activity and depression by examining cardiac autonomic balance (CAB) and cardiac autonomic regulation (CAR), two composite indices of the parasympathetic and sympathetic nervous system, within both a stressful and rewarding context. We hypothesized that CAB_Stress, representing the difference between the parasympathetic and sympathetic branches in response to stress, and CAR_Reward, representing the summation of the two branches in response to reward, will be most indicative of depressogenic risk. We examined the parasympathetic (i.e., respiratory sinus arrhythmia) and sympathetic (i.e., pre-ejection period) responses of 97 emerging adults (M_age = 18.93) for a stress (i.e., negative mood induction) and reward (i.e., probabilistic learning) task, as well as their depressive symptoms at baseline, 3-week, and 6-week follow-up. Analyses found partial support for our hypotheses, revealing greater CAR_Reward (i.e., coactivation of both branches) was related to lower depressive symptoms. Further, exploratory analyses examining gender differences found lower CAB_Stress (i.e., sympathetically-oriented response) was predictive of an increasing trajectory of depression, but only among males. Overall, the current study highlights the importance of simultaneously examining both branches of the ANS across various environmental contexts. Research and clinical implications of the current findings are discussed.

Psychological Distress and Well-Being in Trauma-Exposed Adolescents: A Residualized, Person-Centered Approach to Resilience

Positive adaptation manifests differently in the aftermath of traumatic events. Methodological limitations, however, impede the ability to test conceptualizations of resilience that emphasize the multifaceted nature of these responses. In response, an approach that synthesized a residualized and person-centered conceptualization of resilience examined associations between aspects of resilience in an adolescent sample. In total, 584 racially/ethnically diverse adolescents (age range: 12-17 years; M = 14.98 years; SD = 1.05; 50.9% female; 30.1% White, 29.6% African American, 19.5% Hispanic) self-reported lifetime emotional maltreatment and community violence exposure as well as current levels of depression, posttraumatic stress symptoms (PTSS), violent behavior, and psychological well-being (PWB). Each mental health outcome was regressed on lifetime trauma exposure to create residuals used as indices of resilience. Correlations between the residuals suggested that PWB was more closely related to resilience to depression and PTS, rs = .17-.30, than violent behavior, r = .00. Residuals were subsequently entered into person-centered analyses to identify representative well-being profiles. Cluster analysis identified four groups, including two adaptive profiles defined by (a) lower distress and higher PWB and (b) lower psychopathology and lower PWB, based on adolescents' levels of trauma exposure. These two profiles did not vary regarding impairment, p > .999, suggesting both profiles represent positive adaption to lifetime trauma exposure. Theoretical and clinical implications of distinguishing between these two profiles by assessing PWB in adolescents are discussed, as well as how PWB may manifest within the context of different patterns of psychological distress.

The Association Between PTSD Symptoms and IPV Perpetration Across 6 Years

A large literature documents that posttraumatic stress disorder (PTSD) symptoms are associated with intimate partner violence (IPV) perpetration among adults. However, research on this relationship among adolescents and young adults has been plagued by methodological flaws (e.g., cross-sectional designs). Thus, the purpose of the present study was to examine the longitudinal and bidirectional associations between PTSD symptoms and psychological and physical IPV perpetration from adolesence to young adulthood. A sample of racially and ethnically diverse high school students (N = 1,042; 56% female) were assessed annually for 6 years (from 2010 to 2015 in Southeastern Texas). At each assessment, participants completed measures of PTSD symptoms and psychological and physical IPV perpetration. The mean age of the sample at the first assessment was 15.09 (SD = .79). Structural equation modeling demonstrated that PTSD symptoms at Years 2, 3, and 4 predicted increases in psychological IPV perpetration in the subsequent year. In turn, psychological IPV perpetration at Years 1 and 4 predicted increases in PTSD symptoms in the subsequent years. In addition, psychological IPV perpetration mediated the association between PTSD symptoms and physical IPV perpetration over time. Results were consistent across gender and race/ethnicity. Findings provide initial evidence that PTSD symptoms are associated with IPV perpetration across time from adolescence to young adulthood. Prevention and intervention programs for adolescent and young adult IPV perpetration may benefit from screening for, and potentially treating, PTSD symptoms.

Developmental consequences of emotional abuse and neglect in vulnerable adolescents: A multi-informant, multi-wave study

BACKGROUND

Extant research and theory posit that emotional abuse and emotional neglect-exposure is uniquely harmful during adolescence. Yet, these findings are mostly based on mono-informant, retrospective studies with unselected adults that examine emotional maltreatment in the aggregate. This prevents inferences concerning the unique, prospective risk emotional abuse and neglect, as reported by multiple informants, may confer within at-risk, adolescent samples.

OBJECTIVE

In response, the present study examined how emotional abuse and emotional neglect-exposure in adolescence uniquely related to psychological symptoms and social impairment.

PARTICIPANTS AND SETTING

Our aims were tested in a child welfare system (CWS)-involved sample of adolescents (N = 657; Age_M = 12.49 at baseline) who were participating in a longitudinal study.

METHODS

A multi-informant approach was used to assess emotional abuse/neglect and mental health. Physical abuse and lifetime CWS contact represented covariates in growth curve models.

RESULTS

Emotional abuse predicted symptoms within informant, such that youth-reported emotional abuse predicted youth-reported internalizing, β = 0.21, p = .001, and externalizing, β=0.35, p = .001, symptoms while parent-reported emotional abuse predicted parent-reported externalizing, β=0.30, p <  .001, and internalizing β=0.29, p <  .001, symptoms. Meanwhile, youth-reported emotional neglect predicted heightened self-reported internalizing symptoms, β=0.29, p <  .001, parent-reported externalizing symptoms, β=0.15, p = .002 and social impairment across youth, β=-0.17, p = .01 and parent, β=-0.24, p <  .001, report.

CONCLUSIONS

This study shows the importance of distinguishing between these maltreatment subtypes in adolescence and provides measurement recommendations for future maltreatment research. The manuscript concludes by discussing adolescent emotional abuse and neglect-exposure as a maintenance, as opposed to causal risk, factors.

Comorbid Depression and Anxiety Symptoms in Chinese Adolescents: Testing the Explanatory Power of a Diathesis-Anxiety Model

Anxiety and depressive symptoms frequently co-occur in adolescence and confer greater distress compared to experiencing either symptom alone. A causal model (anxiety symptoms predicting depressive symptoms), a correlated liabilities model (vulnerabilities interacting with stressors to predict both symptoms), and a diathesis-anxiety model (vulnerabilities interacting with anxiety symptoms to predict depressive symptoms) have all been proposed as explanations for the relation between depression and anxiety. To date, however, research has mostly examined these models among North American/Western European adolescents. In response, the present study sought to identify the best explanatory model concerning the relationship between anxiety and depressive symptoms among Chinese adolescents. 494 10^th grade students were assessed for their perceived levels of family cohesion and conflict, stressors, and depressive and anxiety symptoms. Every 3 months for 18 months, youth reported their symptoms and stressors. Symptoms and stressors were person-mean and grand-mean centered to compare nomothetic and idiographic conceptualizations of vulnerability. Overall, evidence suggested a reciprocal, versus causal, relation between anxiety and depressive symptoms. Further, while cohesion and conflict independently predicted anxiety and depressive symptoms, their interactions with stressors were not supported. Ultimately, strong support was found for a diathesis-anxiety model using an idiographic conceptualization of anxiety, such that low perceived family cohesion interacted with within-subject fluctuations of anxiety to predict prospective depressive symptoms. This study provides cross-cultural support for a diathesis-anxiety model and shows the importance of distinguishing between positive and negative family functioning when examining vulnerability in Chinese adolescents. Research and clinical implications of these findings are discussed.

The development and validation of an algorithm to predict future depression onset in unselected youth

BACKGROUND

Universal depression screening in youth typically focuses on strategies for identifying current distress and impairment. However, these protocols also play a critical role in primary prevention initiatives that depend on correctly estimating future depression risk. Thus, the present study aimed to identify the best screening approach for predicting depression onset in youth.

METHODS

Two multi-wave longitudinal studies (N = 591, AgeM = 11.74; N = 348, AgeM = 12.56) were used as the 'test' and 'validation' datasets among youth who did not present with a history of clinical depression. Youth and caregivers completed inventories for depressive symptoms, adversity exposure (including maternal depression), social/academic impairment, cognitive vulnerabilities (rumination, dysfunctional attitudes, and negative cognitive style), and emotional predispositions (negative and positive affect) at baseline. Subsequently, multi-informant diagnostic interviews were completed every 6 months for 2 years.

RESULTS

Self-reported rumination, social/academic impairment, and negative affect best predicted first depression onsets in youth across both samples. Self- and parent-reported depressive symptoms did not consistently predict depression onset after controlling for other predictors. Youth with high scores on the three inventories were approximately twice as likely to experience a future first depressive episode compared to the sample average. Results suggested that one's likelihood of developing depression could be estimated based on subthreshold and threshold risk scores.

CONCLUSIONS

Most pediatric depression screening protocols assess current manifestations of depressive symptoms. Screening for prospective first onsets of depressive episodes can be better accomplished via an algorithm incorporating rumination, negative affect, and impairment.

Offspring Self-Disclosure Predicts Substance-Related Outcomes in an Emergency Department Sample of Young Adults with Traumatic Injury

Background

Hundreds of thousands of individuals visit the emergency department (ED) every year, with many visits occurring following alcohol misuse. Parent-child relationship factors are associated with alcohol-related outcomes. For example, offspring choice to self-disclose information about their lives to parents, rather than parents actively soliciting this information, is associated with substance use. However, it is unclear whether self-disclosure uniquely predicts alcohol-related outcomes in a young adult ED sample.

Methods

Data were collected from young adults (age 18-30 years) visiting an ED for a traumatic injury (n=79). Participants were about 24.4 years old, majority male (53.7%), and Caucasian (76%; 24% African-American). A bifactor model within a structural equation model tested unique effects of self-disclosure on age at first drink, propensity for risky drinking, and likelihood of consuming substances prior to ED visit, over and above parental solicitation and a general factor and gender.

Results

Those who shared more information with their caregivers reported an older age at first drink, lower propensity for risky drinking and lower propensity to consume substances prior to their ED visit.

Conclusions

These findings suggest that self-disclosure may be a unique risk factor in the initiation of alcohol use, development of problem use, and consequences following use.

Short-Term and Long-Term Resilience Among At-Risk Adolescents: The Role of Family and Community Settings

Objective: Given the severe consequences associated with maltreatment, establishing an understanding of pathways to resilience among trauma-exposed youth is a critical public health aim. Longitudinal research has either examined short-term or long-term responses to traumatic events, which prevents testing for a) individual differences between resilience subtypes and b) consistency of short-term, resilient responses over time. Additionally, post-traumatic stress and depression represent the two most common symptom patterns in youth exposed to maltreatment, however few studies have simultaneously investigated resilience to these outcomes. In response, the current study employs a dimensional analytic approach to distinguish between short-term (the ability to demonstrate adaptive responses to ongoing adversities) and long-term (lack of distress over several years in response to a prior adversity) resilience. Consistent with an ecological perspective, the study examines whether family- and community-level protective factors are similarly or uniquely associated with different resilience subtypes.Method: Participants included 943 individuals (469 male, 474 female) from a nationally-representative, at-risk sample of adolescents who completed self-report measures of maltreatment exposure, depressive symptoms and post-traumatic stress symptoms at ages 12, 16, and 18. During the age 12 visit, participants' caregivers completed self-report measures of family routines and neighborhood social cohesion.Results: Overall, we found that family routines uniquely buffered against trauma-related distress across resilience conceptualizations, while social cohesion played a role in short-term resilience to depressive symptoms (p <.05). Participant gender did not moderate these results (p > .05).Conclusion: These findings highlight the importance of understanding resilience dimensionally for adolescents exposed to maltreatment.

Use of cone beam computed tomography imaging for airway measurement to predict obstructive sleep apnea

Objective: This retrospective chart review examined whether airway parameters were correlated with scores on the STOP-Bang questionnaireMethods: Minimal upper airway area, upper airway volume, minimal retropalatal area, retropalatal volume, minimal retroglossal area, and retroglossal volume were calculated from cone beam computed tomography (CBCT) images. Patients were grouped based on their STOP-Bang scores (<3 or ≥3) for obstructive sleep apnea (OSA), and airway parameters were compared across the 2 groups.Results: Thirty-one (43%) of 72 patients with a minimal upper airway area of <110 mm² had STOP-Bang scores of ≥3. Most patients (90%) with STOP-Bang scores of ≥3 had minimal retropalatal areas of <110 mm². Differences were found between groups for minimal upper airway area (P=.03), upper airway volume (P=.04), and minimal retropalatal area (P=.001).Discussion: To assess OSA risk, dentists should compare CBCT images with STOP-Bang scores.

Emotional Maltreatment and Adolescent Depression: Mediating Mechanisms and Demographic Considerations in a Child Welfare Sample

Emotional maltreatment is a risk factor for adolescent depression. Yet, it remains unclear whether commissions and omissions of emotional maltreatment (a) confer vulnerability via distinct mechanisms and (b) demonstrate similar risk across adolescent subpopulations. The present, multiwave study examined whether school engagement and peer relationships explain the depressive effects of distinct emotional maltreatment subtypes in an at-risk child welfare sample (N = 657; ages 11-14, Age_Mean  = 12.49). The findings indicated that commission subtypes of emotional maltreatment predicted increasing depressive symptoms via increasing peer relationship problems, especially for girls. Meanwhile, decreasing school engagement was a depressogenic risk pathway for Hispanic adolescents reporting omission subtypes of emotional maltreatment. The results emphasize the importance of distinguish between emotional maltreatment subtypes to identify specific risk pathways for adolescent depression.

Cardiac autonomic functioning and post-traumatic stress: A preliminary study in youth at-risk for PTSD

The identification of robust, psychophysiological markers of trauma-related distress is critical for developing comprehensive, trauma-informed, mental health assessments for youth. Thus, the present study examined the clinical utility of cardiac autonomic balance (CAB) and cardiac autonomic regulation (CAR), two composite indices of the sympathetic and parasympathetic nervous system. We hypothesized that CAB/CAR would more reliably index post-traumatic stress (PTS) responses compared to measuring the parasympathetic (i.e., respiratory sinus arrhythmia; RSA) and sympathetic (i.e., pre-ejection period; PEP) nervous systems in isolation. Our sample was comprised of 88 diverse, low-income youth (40.9% African-American and 36.4% White; 60.5% girls; M_age = 12.05 years; SD_age = 1.57) who are at increased risk for adversity-exposure. RSA and PEP were measured during a 5-minute baseline period and 5-minute parent-child conflict discussion task. Adolescent-caregiver dyads completed a clinician-administered measure of the youth's lifetime trauma-exposure and current PTS. CAB represented the difference between RSA and PEP, while CAR was the summation of RSA and PEP. Analyses revealed that sympathetically-oriented CAB reactivity uniquely (a) indexed PTS, especially in the context of elevated trauma, and (b) distinguished between those with and without PTSD. Findings highlight the translational promise of using physiological markers that account for the balance between the parasympathetic and sympathetic nervous system.

Predicting sexual behaviors from mid-adolescence to emerging adulthood: The roles of dating violence victimization and substance use

The purpose of the present study was to determine whether dating violence victimization (psychological, physical, and sexual) and substance use (alcohol and marijuana) predicted sexual behaviors that increase risk for poor outcomes from ages 15-19. Adolescents (N = 1042; 56% female) were recruited from high schools in Southeast Texas in 2010 and followed annually for six years. The mean age of the sample at baseline was 15.09 (SD = 0.79). Participants primarily identified as Hispanic (31.4%), White (29.4%), and Black/African American (27.9%). Participants completed measures of dating violence victimization, substance use, and sexual behaviors annually. We examined unique and interactive associations between substance use and dating violence victimization with sexual behaviors that increase risk for poor outcomes. Multilevel modeling demonstrated that, when examining predictors simultaneously, marijuana use and psychological victimization predicted sexual behaviors over time for males. For females, marijuana use, and physical and psychological victimization all predicted sexual behaviors over time, with marijuana exerting the strongest effect, particularly among females who also used alcohol. Prevention efforts for adolescent sexual behaviors that increase risk for poor outcomes should include a focus on reducing substance use, particularly marijuana, and the effects of dating violence victimization.

Predicting Adolescent Substance Use in a Child Welfare Sample: A Multi-Indicator Algorithm

Given the risk of substance use (SU) among adolescents in the child welfare system, identification of risk for prospective impairing SU behaviors is a significant public health priority. We sought to quantify the incremental validity of routine multi-informant assessments of adolescent psychological distress (i.e., the Child Behavior Checklist and Youth Self-Report) and a commonly used SU screening protocol (i.e., the CRAFFT) to predict SU at 18 and 36 months after baseline in a nationally representative child welfare sample (N = 1,054; M_age = 13.72). We used receiver operator characteristics and reclassification analyses to develop our algorithms. We found that a battery consisting of baseline CRAFFT scores, self-reported delinquent behavior, and parent-reported rule-breaking behavior provided an incrementally valid prediction model for SU behavior among females, while baseline CRAFFT scores and self-reported delinquent behavior incrementally predicted SU for males. Results suggest that leveraging existing assessments within the child welfare system can improve forecasting of SU risk for this population.

Synthetic molecular recognition nanosensor paint for microalbuminuria

Microalbuminuria is an important clinical marker of several cardiovascular, metabolic, and other diseases such as diabetes, hypertension, atherosclerosis, and cancer. The accurate detection of microalbuminuria relies on albumin quantification in the urine, usually via an immunoturbidity assay; however, like many antibody-based assessments, this method may not be robust enough to function in global health applications, point-of-care assays, or wearable devices. Here, we develop an antibody-free approach using synthetic molecular recognition by constructing a polymer to mimic fatty acid binding to the albumin, informed by the albumin crystal structure. A single-walled carbon nanotube, encapsulated by the polymer, as the transduction element produces a hypsochromic (blue) shift in photoluminescence upon the binding of albumin in clinical urine samples. This complex, incorporated into an acrylic material, results in a nanosensor paint that enables the detection of microalbuminuria in patient samples and comprises a rapid point-of-care sensor robust enough to be deployed in resource-limited settings.

Youth Depression Screening with Parent and Self-Reports: Assessing Current and Prospective Depression Risk

Few studies have examined the incremental validity of multi-informant depression screening approaches. In response, we examined how recommendations for using a multi-informant approach may vary for identifying concurrent or prospective depressive episodes. Participants included 663 youth (Age_M = 11.83; Age_SD = 2.40) and their caregiver who independently completed youth depression questionnaires, and clinical diagnostic interviews, every 6 months for 3 years. Receiver operating characteristic (ROC) analyses showed that youth-report best predicted concurrent episodes, and that both youth and parent-report were necessary to adequately forecast prospective episodes. More specifically, youth-reported negative mood symptoms and parent-reported anhedonic symptoms incrementally predicted future depressive episodes. Findings were invariant to youth's sex and age, and results from person and variable-centered analyses suggested that discrepancies between informants were not clinically meaningful. Implications for future research and evidence-based decision making for depression screening initiatives are discussed.

Anxiety and Depression During Childhood and Adolescence: Testing Theoretical Models of Continuity and Discontinuity

The present study sought to clarify the trajectory (i.e., continuous vs. discontinuous) and expression (i.e., homotypic vs. heterotypic) of anxiety and depressive symptoms across childhood and adolescence. We utilized a state-of-the-science analytic approach to simultaneously test theoretical models that describe the development of internalizing symptoms in youth. In a sample of 636 children (53% female; M _age = 7.04; SD _age = 0.35) self-report measures of anxiety and depression were completed annually by youth through their freshman year of high school. For both anxiety and depression, a piecewise growth curve model provided the best fit for the data, with symptoms decreasing until age 12 (the "developmental knot") and then increasing into early adolescence. The trajectory of anxiety symptoms was best described by a discontinuous homotypic pattern in which childhood anxiety predicted adolescent anxiety. For depression, two distinct pathways were discovered: A discontinuous homotypic pathway in which childhood depression predicted adolescent depression and a discontinuous heterotypic pathway in which childhood anxiety predicted adolescent depression. Analytical, methodological, and clinical implications of these findings are discussed.

Translating Cognitive Vulnerability Theory Into Improved Adolescent Depression Screening: A Receiver Operating Characteristic Approach

Traditionally, screening research tests how well a given symptom inventory can identify a concurrent depressive episode. Although developmental psychopathology could inform screening protocols for a myriad of depression outcomes (e.g., prospective depressive episodes), approaches typically used in research make it difficult to translate these findings. Using a translational analytic approach and multiwave longitudinal study design, we examined how screening for cognitive vulnerabilities (rumination, dysfunctional attitudes, and attributional style) may improve our ability to identify concurrent depressive episodes, prospective depressive episodes, first lifetime episodes of depression, and recurrent major depressive episodes. There were 473 sixth-grade (early adolescents) and ninth-grade (middle adolescents; AgeM = 13.15, AgeSD = 1.62) students who completed baseline self-report cognitive vulnerability and depressive symptom measures. At baseline and every 6 months for 3 years, pediatric depression interviews were completed by the caregiver and youth. A receiver operating characteristic (ROC) approach was utilized to test our aims. Distinct algorithms best forecasted our depression outcomes. Rumination and attributional style emerged as unique and incrementally valid predictors for prospective episodes after controlling for baseline depressive symptoms. Rumination was the only unique predictor for first lifetime depressive episodes. For recurrent major depression, rumination in early adolescence and attributional style in middle adolescence served as incremental predictors beyond baseline depressive symptoms. Proposed cutoffs and diagnostic likelihood ratios are offered for algorithms for each depression outcome. Assessing cognitive vulnerability represents a feasible method to improve depression screening initiatives. Using an ROC-informed approach can help prevention initiatives better leverage the considerable gains made within developmental psychopathology research.

Emerging Adulthood and Prospective Depression: A Simultaneous Test of Cumulative Risk Theories

Past research indicates that a history of depression and exposure to abuse and neglect represent some of the most robust predictors of depression in emerging adults. However, studies rarely test the additive or interactive risk associated with these distinct risk factors. In response, the present study explored how these three risk factors (prior depression, abuse, and neglect) synergistically predicted prospective depressive symptoms in a sample of 214 emerging adults (M_age = 21.4 years; SD_age = 2.4; 78% females). Subtypes of maltreatment and lifetime history of depression were assessed through semi-structured interviews, and depressive symptoms were assessed annually for three years via self-report measures. The results indicated that for both males and females, a lifetime history of depression, abuse, and neglect-exposure uniquely conferred risk for elevated depressive symptoms. Furthermore, the interaction between neglect and prior depression forecasted increasing depressive symptoms, and a history of abuse also predicted increasing depressive symptoms, but only in females. These findings are contextualized within extant developmental psychopathology theories, and translational implications for trauma-informed depression prevention efforts are discussed.

Testing the factor structure and measurement invariance of the conflict in Adolescent Dating Relationship Inventory

Intimate-partner violence (IPV) in adolescent and young-adult dating relationships is a prevalent and serious public health problem. The measurement of IPV across adolescence has most commonly relied on the Conflict in Adolescent Dating Relationship Inventory (CADRI; Wolfe et al., 2001), which postulates 5 distinct yet related types of IPV (i.e., threatening, verbal/emotional, relational, physical, and sexual). However, the CADRI has received minimal examination to confirm its factor structure, in particular, whether the factor structure is invariant across sex, race/ethnicity, and time, despite the clinical use of this measure for screening and treatment purposes. In response, we conducted a confirmatory factor analysis of the CADRI and tested whether the factor structure was invariant across sex, race/ethnicity, and time. Adolescents (N = 1,042, 56% girls, mean age at baseline = 15.09, SD = 0.79) from high schools in the southwestern United States completed the CADRI annually for 6 consecutive years. Results confirmed the 5-factor structure of the CADRI and demonstrated measurement invariance across sex, race/ethnicity, and time. Our findings suggest that the CADRI captures 5 related but distinct types of IPV and that use of the CADRI is appropriate across sex, race/ethnicity, and time. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Maltreatment subtypes, depressed mood, and anhedonia: A longitudinal study with adolescents

OBJECTIVE

Maltreatment exposure is a robust predictor of adolescent depression. Yet despite this well-documented association, few studies have simultaneously examined how maltreatment subtypes relate to qualitatively distinct depressive symptoms. The present multiwave longitudinal study addressed this gap in the literature by examining how different maltreatment subtypes independently impact depressed mood and anhedonia over time in a diverse adolescent sample.

METHOD

Adolescents (N = 673, M_age = 14.83, SD_age = 0.66, 57.1% female, 32.8% Hispanic, 30.4% Caucasian, 25.0% African American) completed self-report inventories for child-maltreatment and annual self-report measures of depressed mood and anhedonia over the course of 6 years. We used latent-growth-curve modeling to test how maltreatment exposure predicted anhedonia and depressed mood, and whether these relations differed as a function of sex and/or race/ethnicity.

RESULTS

Overall, both emotional abuse (p < .001) and neglect (p = .002) predicted levels of depressed mood over time, whereas only emotional neglect predicted levels (p < .001) and trajectories (p = .001) of anhedonia. Physical and sexual abuse did not predict depressive symptoms after accounting for emotional abuse and neglect (ns). These findings were largely invariant across sex and race.

CONCLUSION

Findings suggest that the consequences of emotional neglect may be especially problematic in adolescence because of its impact on both depressed mood and anhedonia, and that emotional abuse's association with depression is best explained via symptoms of depressed mood. These findings are congruent with recent findings that more "silent types" of maltreatment uniquely predict depression, and that abuse and neglect experiences confer distinct profiles of risk for psychological distress. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

A multimethod screening approach for pediatric depression onset: An incremental validity study

OBJECTIVE

Screening protocols that rely on a single informant are inadequate in predicting pediatric depression. Multi-informant and risk factor screening approaches are potentially more sensitive methods for identifying depression risk, but the incremental validity of these protocols has not been adequately tested. Using a translational analytic approach and multimethod, longitudinal study design, we simultaneously tested several multi-indicator approaches to depression screening to identify an optimal algorithm for predicting depression onset in youth.

METHOD

Participants were 222 never-depressed children and adolescents (M_age = 10.75 years old, SD_age = 1.85; female = 50.45%; 82.88% White), who completed baseline questionnaires for depressive symptoms and cognitive vulnerabilities, in addition to a morphed face task to assess pupil dilation. Mothers, meanwhile, completed baseline questionnaires and a semistructured interview to assess maternal and pediatric depression. Follow-up depression diagnostic assessments with both the mother and youth occurred every 6 months for 2 years. Receiver operating characteristics and reclassification analyses were used to test our aims.

RESULTS

Overall, we found moderate support for a multi-informant approach, and convincing evidence that individual differences in pupil dilation uniquely predicted depression onset. Youth with subthreshold depressive symptoms and elevated pupil dilation were over twice as likely to develop a first lifetime episode of depression compared to one's risk rate based on sex and age.

CONCLUSIONS

Our study provides one of the first screening batteries for detecting first lifetime episodes of depression in youth. The unique and incremental validity provided by pupil dilation suggests feasible biological indicators of depression risk can improve primary prevention efforts that target depression, such as universal pediatric depression screening. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

The Stability of Intimate Partner Violence Perpetration From Adolescence to Emerging Adulthood in Sexual Minorities

PURPOSE

The objective of this study was to examine the stability of physical and sexual intimate partner violence (IPV) perpetration from adolescence to emerging adulthood among sexual minorities.

METHODS

Adolescents who identified as a sexual minority (N = 135; 71.1% female; mean age = 15.02, standard deviation=.77; 34.1% African-American/black, 26.7% white, 22.2% Hispanic) from southeast Texas were assessed annually for 6 years on their IPV perpetration.

RESULTS

Structural equation modeling demonstrated that physical IPV perpetration was modestly stable across years 1-4 (24.6%, 24.6%, 26.4%, and 21.6%, respectively), decreased in year 5 (18.6%), and increased in year 6 (24.5%). The stability of sexual IPV perpetration was high across all 6 years (14.3%, 13%, 14.9%, 10.8%, 12.4%, and 14.4%).

CONCLUSIONS

This is the first study to examine the stability of IPV perpetration among sexual minority adolescents. Findings suggest that the development of interventions for IPV among sexual minority adolescents is needed, as IPV is unlikely to desist from adolescence to emerging adulthood.

Predicting Teen Dating Violence Perpetration

OBJECTIVES

With our study we aimed to (1) understand what factors uniquely conferred risk for physical and sexual forms of teen dating violence (TDV) perpetration and (2) create a screening algorithm to quantify perpetration risk on the basis of these factors.

METHODS

A total of 1031 diverse public high school students living in Southeast Texas participated in our study (56% female; 29% African American, 28% white, and 31% Hispanic). Self-report measures concerning TDV and associated risk factors were completed annually for 6 years.

RESULTS

Results suggested that family violence (domestic violence exposure, maltreatment) together with deficits in conflict resolution incrementally improved our forecasts above and beyond lifetime history of physical TDV perpetration (net reclassification improvement = 0.44; 95% confidence interval [CI] = 0.30-0.59). Meanwhile, a violent dating history (TDV sexual perpetration, sexual victimization, and emotional perpetration) and acceptance of TDV incrementally improved our models for forecasting sexual forms of perpetration (net reclassification improvement = 0.41; 95% CI = 0.24-0.58). These models adequately discriminated between future perpetrators and nonoffenders (area under the curve statistic >0.70; 95% CI: 0.69-0.74). Overall, adolescents with positive test results on our algorithms were over twice as likely to perpetrate dating violence over the course of 6 years.

CONCLUSIONS

Our study represents one of the first applications of reclassification analyses to psychosocial research in a pediatric population. The result is a theoretically informed, empirically based algorithm that can adequately estimate the likelihood of physical and sexual TDV perpetration during vulnerable developmental periods. These findings can immediately aid emerging preventive initiatives for this increasing public health concern.

The Impact of Intimate Partner Violence Exposure in Adolescence and Emerging Adulthood: A Developmental Psychopathology Approach

Despite increased attention on parental intimate partner violence (IPV) exposure, a relative paucity of research has examined the developmental consequences of this traumatic experience within a life span approach. The aim of the present study was to examine how parental IPV exposure may relate to mental health during the transition from adolescence to emerging adulthood. Furthermore, we examined whether the impact of parental IPV exposure was unique from more commonly studied maltreatment experiences, specifically neglect and physical abuse. A large, racially and ethnically diverse sample (N_baseline = 1,042; 56% female; M_age = 15.1, SD = 0.79; 31.4% Hispanic, 29.4% White, 27.9% African American, 3.6% Asian, 7.7% biracial or other) of adolescents completed a baseline assessment for parental physical IPV exposure and maltreatment as well as measures for symptoms of depression, posttraumatic stress, and substance use, annually for 6 consecutive years. Mixed-level modeling was used to examine how parental IPV exposure was uniquely associated with different patterns of mental health across developmental epochs. Findings demonstrated a multifaceted relation with mental health. For internalizing symptoms, the effect was pronounced during adolescence, and neglect increased the risk for depression symptomatology. Meanwhile, parental-IPV-exposed adolescents were at increasing risk for substance use as they aged into adulthood. Symptom levels and trajectories were independent and distinct from maltreatment experiences. This study helps illuminate parental IPV exposure's unique influence on well-being during vulnerable developmental periods. It also calls attention to the importance of developing suitable intervention/prevention programs to target this vulnerable population.

Does change in perceptions of peer teen dating violence predict change in teen dating violence perpetration over time?

Research has previously demonstrated that perceptions of peer's teen dating violence (TDV) is associated with one's own perpetration of TDV, although little research has examined whether this relationship is consistent across developmental time periods (i.e., mid-to-late adolescence). The present study examined whether changes in perceptions of peer's TDV predicted change in one's own perpetration of TDV in a sample of ethnically diverse adolescents from ages 15 to 18 (N = 1,042). Parallel process modeling demonstrated that decreases in perceptions of peer's TDV predicted decreases in TDV perpetration over time, and this relationship was more pronounced for males than females. These findings lend further support to the need for TDV prevention and intervention programs to include peer influence in their programs.

PACAP Promotes Matrix-Driven Adhesion of Cultured Adult Murine Neural Progenitors

New neurons are born throughout the life of mammals in germinal zones of the brain known as neurogenic niches: the subventricular zone of the lateral ventricles and the subgranular zone of the dentate gyrus of the hippocampus. These niches contain a subpopulation of cells known as adult neural progenitor cells (aNPCs), which self-renew and give rise to new neurons and glia. aNPCs are regulated by many factors present in the niche, including the extracellular matrix (ECM). We show that the neuropeptide PACAP (pituitary adenylate cyclase-activating polypeptide) affects subventricular zone-derived aNPCs by increasing their surface adhesion. Gene array and reconstitution assays indicate that this effect can be attributed to the regulation of ECM components and ECM-modifying enzymes in aNPCs by PACAP. Our work suggests that PACAP regulates a bidirectional interaction between the aNPCs and their niche: PACAP modifies ECM production and remodeling, in turn the ECM regulates progenitor cell adherence. We speculate that PACAP may in this manner help restrict adult neural progenitors to the stem cell niche in vivo, with potential significance for aNPC function in physiological and pathological states.

Age of onset for physical and sexual teen dating violence perpetration: A longitudinal investigation

Teen dating violence (TDV) is a serious and prevalent public health problem. TDV is associated with a number of negative health consequences for victims and predicts violence in adult relationships. Thus, efforts should be devoted to the primary prevention of TDV. However, only a few studies have examined when the risk for the first occurrence of TDV is greatest. Continued research in this area would inform the timing of, as well as developmentally appropriate strategies for, TDV primary prevention efforts. The current study examined at which age(s) the risk for TDV perpetration onset was greatest. Utilizing a panel-based design, a sample of racially/ethnically diverse high school students (N=872; 56% female) from the Southwestern United States completed self-report surveys on physical and sexual TDV perpetration annually for six years (2010 to 2016). Findings suggested that the physical TDV risk of onset was at or before ages 15 to 16 for females and at or before age 18 for males. For sexual TDV perpetration, risk was similar for males and females during adolescence, before uniquely increasing for males, and not females in emerging adulthood. Findings highlight the need for TDV primary prevention programs to be implemented early in high school, and potentially in middle school.

Clinical Decision-Making Following Disasters: Efficient Identification of PTSD Risk in Adolescents

The present study aimed to utilize a Receiver Operating Characteristic (ROC) approach in order to improve clinical decision-making for adolescents at risk for the development of psychopathology in the aftermath of a natural disaster. Specifically we assessed theoretically-driven individual, interpersonal, and event-related vulnerability factors to determine which indices were most accurate in forecasting PTSD. Furthermore, we aimed to translate these etiological findings by identifying clinical cut-off recommendations for relevant vulnerability factors. Our study consisted of structured phone-based clinical interviews with 2000 adolescent-parent dyads living within a 5-mile radius of tornados that devastated Joplin, MO, and northern Alabama in Spring 2011. Demographics, tornado incident characteristics, prior trauma, mental health, and family support and conflict were assessed. A subset of youth completed two behavioral assessment tasks online to assess distress tolerance and risk-taking behavior. ROC analyses indicated four variables that significantly improved PTSD diagnostic efficiency: Lifetime depression (AUC = .90), trauma history (AUC = .76), social support (AUC = .70), and family conflict (AUC = .72). Youth were 2-3 times more likely to have PTSD if they had elevated scores on any of these variables. Of note, event-related characteristics (e.g., property damage) were not related to PTSD diagnostic status. The present study adds to the literature by making specific recommendations for empirically-based, efficient disaster-related PTSD assessment for adolescents following a natural disaster. Implications for practice and future trauma-related developmental psychopathology research are discussed.

The distal consequences of physical and emotional neglect in emerging adults: A person-centered, multi-wave, longitudinal study

Despite being the most prevalent form of child maltreatment, the correlates and consequences of neglect are poorly understood, particularly during early adulthood. The present multi-wave, longitudinal study sought to address this gap in this literature by examining physical and emotional neglect in emerging adults in a diverse community sample. 580 adolescents (Age_Mean=18.25; Age_SD=0.59; 58.3% female; 31% Hispanic, 28.9% Caucasian; 26.2% African-American; 13.9% other) completed self-report measures for child maltreatment at baseline, and measures for depression, posttraumatic stress disorder, generalized anxiety disorder, and substance use every year for three years. For our analyses, we used both variable-centered (mixed-level modeling) and person-centered (latent profile analysis) analyses to best understand a) how physical and emotional neglect relate to other forms of maltreatment and b) to determine physical and emotional neglect's unique impact on prospective mental health functioning. Our person-centered analyses revealed that a three-profile model provided the best solution for our data ("No Trauma," "Abuse", and "Neglect"). In longitudinal analyses, the "the neglect" group had significantly elevated scores compared to the "no trauma" group on all outcomes except alcohol use (p<0.01). Results from our variable-centered analyses showed comparable findings between physical and emotional neglect, with higher scores corresponding to elevated symptoms of depression, PTSD, illicit substance use, and cigarette use over time (p<0.01). In conclusion, our results suggest that early neglect-exposure poses a risk for the subsequent development of internalizing symptoms and substance use behaviors among emerging adults.

How should we screen for depression following a natural disaster? An ROC approach to post-disaster screening in adolescents and adults

BACKGROUND

The present study's aim was to provide the foundation for an efficient, empirically based protocol for depression screening following a natural disaster. Utilizing a Receiver Operating Characteristic (ROC) analytic approach, the study tested a) what specific disaster-related stressors (i.e., property damage, loss of basic services) and individual-related constructs (i.e., PTSD symptoms, trauma history, social support) conveyed the greatest risk for post-natural disaster depression, b) specific cutoff scores across these measures, and c) whether the significance or cutoff scores for each construct varied between adolescents and adults.

METHODS

Structured phone-based clinical interviews were conducted with 2000 adolescents who lived through a tornado and 1543 adults who survived a hurricane.

RESULTS

Findings suggested that in both adolescents and adults, individual-related constructs forecasted greater risk for depressive symptoms following a natural disaster compared to disaster-related stressors. Furthermore, trauma history and PTSD symptoms were particularly strong indicators for adolescent depressive symptoms compared to adult depressive symptoms. Adolescents and adults who reported vulnerable scores for social support, trauma history, and lifetime PTSD symptoms were approximately twice as likely to present as depressed following the natural disaster.

LIMITATIONS

Findings from the present study were limited to post-disaster assessments and based on self-reported functioning 6-12 months following the natural disaster.

CONCLUSIONS

The present study synthesizes the extensive body of research on post-disaster functioning by providing a clear framework for which questions may be most important to ask when screening for depression following a natural disaster.

Dating Violence and Substance Use as Longitudinal Predictors of Adolescents' Risky Sexual Behavior

The objectives of this study is to examine dating violence perpetration and victimization (physical, psychological, and sexual) and lifetime substance use (alcohol, marijuana, and hard drugs) as longitudinal predictors of adolescents' risky sexual behavior across 1 year and to determine whether predictors varied across adolescents' gender and ethnicity. A sample of Caucasian, African American, and Hispanic male and female adolescents from seven public high schools in Texas (N = 882) participated. Adolescents completed self-report measures of dating violence, lifetime substance use, and risky sexual behavior at baseline and, 1-year later, completed a second assessment of their risky sexual behavior. Path analysis demonstrated that greater physical dating violence victimization, lifetime alcohol use, lifetime marijuana use, and age (being older) were all significant predictors of risky sexual behavior at the 1-year follow-up. These results did not vary across gender or the three ethnic groups (Caucasian, African American, and Hispanic). Overall, substance use was a longitudinal predictor of risky sexual behavior across the three ethnic groups, with physical dating violence victimization being the only type of dating violence longitudinally predicting risky sexual behavior. Prevention efforts should consider the roles of physical dating violence and substance use in preventing risky sexual behavior.