The Intergenerational Impact of Genetic and Psychological Factors on Blood Pressure Study (InterGEN): Design and Methods for Recruitment and Psychological Measures

BACKGROUND

Although studies show that genomics and environmental stressors affect blood pressure, few studies have examined their combined effects, especially in African Americans.

OBJECTIVE

We present the recruitment methods and psychological measures of the Intergenerational Impact of Genetic and Psychological Factors on Blood Pressure (InterGEN) study, which seeks to investigate the individual and combined effects of genetic (G) and environmental (E) (psychological) stressors on blood pressure in African American mother-child dyads. Genetic methods are presented elsewhere, but here we present the recruitment methods, psychological measures, and analysis plan for these environmental stressors.

METHODS

This longitudinal study will enroll 250 mother-child dyads (N = 500). Study participation is restricted to women who (a) are ≤21 years of age, (b) self-identify as African American or Black, (c) speak English, (d) do not have an identified mental illness or cognitive impairment, and (e) have a biological child between 3 and 5 years old. The primary environmental stressors assessed are parenting stress, perceived racism and discrimination, and maternal mental health. Covariates include age, cigarette smoking (for mothers), and gender (for children). The study outcome variables are systolic and diastolic blood pressure.

ANALYSIS

The main analytic outcome is genetic-by-environment interaction analyses (G × E); however, main effects (G) and (E) will be individually assessed first. Genetic (G) and interaction analyses (G × E) are described in a companion paper and will include laboratory procedures. Statistical modeling of environmental stressors on blood pressure will be done using descriptive statistics and generalized estimating equation models.

IMPLICATIONS

The methodology presented here includes the study rationale, community engagement and recruitment protocol, psychological variable measurement, and analysis plan for assessing the association of environmental stressors and blood pressure. This study may provide the foundation for other studies and development of interventions to reduce the risk for hypertension and to propose targeted health promotion programs for this high-risk population.

The Interactive Effects of Stressful Family Life Events and Cortisol Reactivity on Adolescent Externalizing and Internalizing Behaviors

This study investigated the associations between stressful family life events and adolescent externalizing and internalizing behaviors, and the interactive effects of family life events and cortisol reactivity on problem behaviors. In a sample of 100 mothers and their adolescents (M age = 15.09; SD age = .98; 68 % girls), adolescent cortisol reactivity was measured in response to a mother-adolescent conflict interaction task designed to elicit a stress response. Mothers reported on measures of family life events and adolescent problem behaviors. Results indicated that a heightened adolescent cortisol response moderated the relations between stressful family life events and both externalizing and internalizing behaviors. Results support context-dependent theoretical models, suggesting that for adolescents with higher cortisol reactivity (compared to those with lower cortisol reactivity), higher levels of stressful family life events were associated with greater problem behaviors, whereas lower levels of stressful family life events were related to fewer problem behaviors.

Maltreatment, family environment, and social risk factors: Determinants of the child welfare to juvenile justice transition among maltreated children and adolescents

This study prospectively examines the transition from the child welfare system into the juvenile justice system among 10,850 maltreated children and adolescents and explores how patterns of risks, including severity and chronicity of maltreatment, adverse family environment, and social risk factors, affect service systems transition. Almost three percent of maltreated children and adolescents had their first juvenile justice adjudication within an average of approximately six years of their initial child protective services investigation (CPS). Social risk factors, including a child's age at index CPS investigation (older), gender (boys), and race/ethnicity (Black and Hispanic) significantly predicted the risk of transition into the juvenile justice system. Recurrence of maltreatment and experiencing at least one incident of neglect over the course of the study period also increased the risk of transition into the juvenile justice system. However, subtypes of maltreatment, including physical, sexual, and other types of abuse did not significantly predict the risk of juvenile justice system transition. Finally, family environment characterized by poverty also significantly increased the risk of juvenile justice system transition. These findings have important implications for developing and tailoring services for maltreated children, particularly those at-risk for transitioning into the juvenile justice system.

Youth E-cigarette, Blunt, and Other Tobacco Use Profiles: Does SES Matter?

OBJECTIVE

We examined the associations between socioeconomic status (SES) and adolescent polytobacco use profiles (including e-cigarettes and blunts).

METHODS

Adolescents (N = 1932) completed surveys conducted in 2014 in 3 Connecticut high schools. Within a Latent Class Analysis (LCA) framework, logistic regressions examined associations between SES and polytobacco use profiles comprising never, ever, and current e-cigarette, blunt, cigarette, cigar, cigarillo, hookah, and smokeless tobacco use.

RESULTS

We identified 5 classes: (1) current polytobacco users; (2) ever polytobacco users; (3) current e-cigarette, blunt, and cigarette users; (4) ever e-cigarette and blunt users; and (5) never users. Low SES, relative to high SES, was associated with greater likelihood of being: (1) an ever polytobacco user; (2) a current e-cigarette, blunt, and cigarette user; and (3) an ever e-cigarette and blunt user, relative to a never user.

CONCLUSIONS

Low SES is associated with membership in distinct polytobacco use latent classes. Regulatory initiatives that focus exclusively on cigarette use may miss the opportunity to influence adolescent use of other products, which may be especially relevant to low-income individuals. Future research should examine whether targeting a broader range of products reduces SES-related tobacco use disparities.

Reflections on a Community Psychology Setting and the Future of the Field

The 50th anniversary of the Swampscott Conference offers an opportunity to reflect on a community psychology setting, The Consultation Center at Yale, that was formed in response to the 1963 Community Mental Health Act and the 1965 Swampscott Conference. The Center has flourished as a community psychology setting for practice, research, and training for 39 of the 50 years since Swampscott. Its creation and existence over this period offers an opportunity for reflection on the types of settings needed to sustain the field into the future.

Development and validation of a brief trauma screening measure for children: The Child Trauma Screen

OBJECTIVE

Childhood exposure to trauma, including violence and abuse, is a major public health concern that has resulted in increased efforts to promote trauma-informed child-serving systems. Trauma screening is an important component of such trauma-informed systems, yet widespread use of trauma screening is rare in part due to the lack of brief, validated trauma screening measures for children. We describe development and validation of the Child Trauma Screen (CTS), a 10-item screening measure of trauma exposure and posttraumatic stress disorder (PTSD) symptoms for children consistent with the DSM-5 definition of PTSD.

METHOD

Study 1 describes measure development incorporating analysis to derive items based on existing measures from 1,065 children and caregivers together with stakeholder input to finalize item selection. Study 2 describes validation of the CTS with a clinical sample of 74 children and their caregivers.

RESULTS

Results support the CTS as an empirically derived, reliable measure to screen children for trauma exposure and PTSD symptoms with strong convergent, divergent, and criterion validity.

CONCLUSION

The CTS is a promising measure for rapidly and reliably screening children for trauma exposure and PTSD symptoms. Future research is needed to confirm validation and to examine feasibility and utility of its use across various child-serving systems. (PsycINFO Database Record

Child and case influences on recidivism in a statewide dissemination of Multisystemic Therapy for juvenile offenders

Multisystemic Therapy (MST) is an evidence-based treatment for high-risk youth and their families shown to reduce subsequent delinquent activity. This study investigated (1) re-arrest rates of a statewide MST dissemination; and (2) the relation of child, family, and case characteristics to re-arrest rates following receipt of MST. Analyses examined outcomes for 633 youth following referral to MST. Separate models examined predictors of general re-arrest of any type and of more serious misdemeanor or felony arrests. Sixty-five percent of youth experienced a new arrest of any type within 12-months of MST initiation; fewer (53%) experienced a misdemeanor or felony charge in that timeframe. Recipients who were younger, had an externalizing behavior disorder, and had a greater number and severity of pre-MST charges were more likely to recidivate. Findings highlight potential child and case factors that may account for variability in treatment effects when MST is implemented broadly within a system.

The Relation of Exposure to Traumatic Events and Longitudinal Mental Health Outcomes for Children Enrolled in Systems of Care: Results from a National System of Care Evaluation

This study examined the relation between children's history of exposure to potentially traumatic events (PTEs) and clinical and functional mental health trajectories over a 18-month period among a national sample of youth referred for services in children's behavioral health systems of care (SOCs). Using data from the national evaluation of the Comprehensive Community Mental Health Services program for communities funded from 1997 to 2000, the study sample included 9556 children and their families. Latent growth modeling was used to assess the effect of history of exposure to PTEs on trajectories in a number of behavioral health outcomes during the 3-year period following referral to services, controlling for child demographic characteristics (gender, race, and age). Results revealed that, on average, children in SOCs exhibited significant improvements over time on all four outcome measures. Children with a history of exposure to PTEs had higher rates of internalizing and externalizing problem behaviors and functional impairments and fewer behavioral and emotional strengths at baseline, but experienced improvements in these outcomes at the same rates as children without exposure to a traumatic event. Finally, child race, gender, and age also were associated with differences in behavioral health trajectories among service recipients. Implications for SOCs, including approaches to make them more trauma-informed, are discussed.

Building Capacity for Trauma-Informed Care in the Child Welfare System: Initial Results of a Statewide Implementation

Exposure to childhood trauma is a major public health concern and is especially prevalent among children in the child welfare system (CWS). State and tribal CWSs are increasingly focusing efforts on identifying and serving children exposed to trauma through the creation of trauma-informed systems. This evaluation of a statewide initiative in Connecticut describes the strategies used to create a trauma-informed CWS, including workforce development, trauma screening, policy change, and improved access to evidence-based trauma-focused treatments during the initial 2-year implementation period. Changes in system readiness and capacity to deliver trauma-informed care were evaluated using stratified random samples of child welfare staff who completed a comprehensive assessment prior to (N = 223) and 2 years following implementation (N = 231). Results indicated significant improvements in trauma-informed knowledge, practice, and collaboration across nearly all child welfare domains assessed, suggesting system-wide improvements in readiness and capacity to provide trauma-informed care. Variability across domains was observed, and frontline staff reported greater improvements than supervisors/managers in some domains. Lessons learned and recommendations for implementation and evaluation of trauma-informed care in child welfare and other child-serving systems are discussed.

Profiles of Intimate Partner Violence Victimization, Substance Misuse, and Depression Among Female Caregivers Involved with Child Protective Services

Intimate partner violence (IPV) victimization, substance misuse, and depression are highly prevalent among female caregivers involved with child protective services (CPS). Understanding heterogeneity in the occurrence of these problems is essential to improving pathways to intervention for women in this population. Latent class analysis was employed to determine whether there exist homogeneous subgroups of female caregivers who experience different patterns of IPV victimization, substance misuse, and depression. A restricted three-class solution best fit the data, suggesting high risk, moderate risk, and no risk subgroups. A substantial number of female caregivers comprise the high-risk subgroup (33%) in which caregivers reported very high rates of IPV victimization, substance misuse, and depression. Only a very small proportion comprised the no-risk subgroup (9%). Findings emphasize the heterogeneity among subgroups of female caregivers based on these risk factors, which may have implications for practitioners, such as CPS caseworkers, and researchers alike.

Adolescents' and Young Adults' Perceptions of Electronic Cigarettes for Smoking Cessation: A Focus Group Study

INTRODUCTION

Research has shown that adults perceive that electronic cigarettes (e-cigarettes) are effective for smoking cessation, yet little is known about adolescents and young adults' perceptions of e-cigarettes for quitting cigarette smoking. This study describes middle, high school, and college students' beliefs about, and experiences with, e-cigarettes for cigarette smoking cessation.

METHODS

We conducted 18 focus groups (n = 127) with male and female cigarette smokers and nonsmokers in 2 public colleges, 2 high schools, and 1 middle school in Connecticut between November 2012 and April 2013. Participants discussed cigarette smoking cessation in relation to e-cigarettes. Verbatim transcripts were analyzed using thematic analysis.

RESULTS

All participants, regardless of age and smoking status, were aware that e-cigarettes could be used for smoking cessation. College and high school participants described different methods of how e-cigarettes could be used for smoking cessation: (a) nicotine reduction followed by cessation; (b) cigarette reduction/dual use; and (c) long-term exclusive e-cigarette use. However, overall, participants did not perceive that e-cigarette use led to successful quitting experiences. Participants described positive attributes (maintenance of smoking actions, "healthier" alternative to cigarettes, and parental approval) and negative attributes (persistence of craving, maintenance of addiction) of e-cigarettes for cessation. Some college students expressed distrust of marketing of e-cigarettes for smoking cessation.

CONCLUSIONS

Adolescent and young adult smokers and nonsmokers perceive that there are several methods of using e-cigarettes for quitting and are aware of both positive and negative aspects of the product. Future research is needed to determine the role of e-cigarettes for smoking cessation in this population.

Relationship of risk assessment to placement characteristics in a statewide child welfare population

Risk assessments allow child and youth services to identify children who are at risk for maltreatment (e.g., abuse, neglect) and help determine the restrictiveness of placements or need for services among youth entering a child welfare system. Despite the use of instruments by many agencies within the U.S. to determine the appropriate placements for youth, research has shown that placement decisions are often influenced by factors such as gender, age, and severity of social-emotional and behavior problems. This study examined ratings of risk across multiple domains using a structured assessment tool used by caseworkers in the Rhode Island child welfare system. The relationship between ratings of risk and placement restrictiveness was also examined. Risk levels varied across placement settings. Multivariate analyses revealed that lower caseworker ratings of parent risk and higher ratings of youth risk were associated with more restrictive placements for youth. Implications for the child welfare system are discussed.

The moderating effect of family involvement on substance use risk factors in adolescents with severe emotional and behavioral challenges

OBJECTIVE

The current study longitudinally examined the moderating effects of family involvement, which previous research has shown to be a protective factor against adolescents' substance use involvement, on the associations between internalizing and externalizing problems, respectively, and substance use (alcohol, marijuana, and tobacco) and problems in a unique sample of adolescents with severe emotional and behavioral problems.

METHOD

Adolescents (n=4786) and their parents were assessed at three waves over a 1-year period as part of the SAMHSA funded Comprehensive Community Mental Health Initiative (CMHI). Multilevel growth curve models were estimated using Hierarchical Linear Modeling (HLM) to examine the associations between time-varying internalizing and externalizing problems, respectively, and substance use involvement over time as a function of family involvement at baseline.

RESULTS

Results supported the hypothesis that family involvement protects against adolescent substance use involvement by buffering the adverse effects of both internalizing and externalizing problems. Specifically, for alcohol use, family involvement buffered the negative effects of high externalizing problems. For tobacco use, family involvement buffered the negative effects of both internalizing and externalizing problems, respectively. For substance use problems, family involvement buffered the effects of only internalizing problems. Family involvement did not moderate effects of emotional and behavioral problems on marijuana use, however, a significant main effect was observed such that family involvement was negatively related to marijuana use.

CONCLUSIONS

Results suggest that the beneficial effects of family involvement on at-risk adolescents' substance use involvement are dependent on the type of emotional and behavioral problems the adolescent experiences as well as the type of substance the adolescent uses. Implications for family- and adolescent-focused treatment are discussed.

Racial/ethnic differences in patterns of sexual risk behavior and rates of sexually transmitted infections among female young adults

OBJECTIVES

We examined patterns of sexual behavior and risk for sexually transmitted infections (STIs) in young adulthood for Black, Hispanic, and White females.

METHODS

We used a nationally representative sample of 7015 female young adults from wave III of the National Longitudinal Study of Adolescent Health. Sexual risk items assessed behaviors occurring in the previous 6 years and past year to determine classes of sexual risk and links to STIs in young adulthood.

RESULTS

Latent class analysis revealed 3 sexual risk classes for Black and Hispanic youths and 4 sexual risk classes for White youths. The moderate and high risk classes had the highest probabilities of risky sexual partners, inconsistent condom use, and early age of sexual initiation, which significantly increased odds for STIs compared with recent abstainers.

CONCLUSIONS

We found different classes of sexual behavior by race/ethnicity, with Black and Hispanic young women most at risk for STIs in young adulthood. Preventive efforts should target younger adolescents and focus on sexual partner behavior.

Psychological distress and substance use among community-recruited women currently victimized by intimate partners: a latent class analysis and examination of between-class differences

Latent class analysis was used to examine patterns of victimization among a community sample of 212 women experiencing intimate partner violence (IPV). Results identified three classes of women characterized by victimization history (recent IPV, childhood victimization); classes were further differentiated by IPV-related posttraumatic stress disorder symptoms, other indicators of psychological distress, and substance use. Differentiating levels of victimization and their associated patterns of psychosocial functioning can be used to develop intervention strategies targeting the needs of different subgroups of women so that mental health and substance use problems can be reduced or prevented altogether. Implications for treatment and future research are presented here.

The role of ethnic pride and parental disapproval of smoking on smoking behaviors among minority and white adolescents in a suburban high school

BACKGROUND

Adolescence is a critical developmental period when tobacco use is initiated and progression to regular smoking occurs. Another growing concern is the mounting evidence of ethnic/racial disparities in the smoking rates and adverse health consequences related to smoking. To reduce ethnic/racial disparities in smoking behaviors, understanding the protective influences against smoking behaviors among minority adolescents is important. Therefore, we examined the role of ethnic pride and parental disapproval of smoking on a wide range of smoking behaviors in ethnic/racial minority and White adolescents attending a suburban high school in Connecticut.

METHODS

A total of 870 adolescents (ethnic/racial minority: n= 202) completed questions on susceptibility to smoking, ever trying a cigarette, smoking at least one cigarette daily in the past 30 days, as well as parental disapproval of smoking and ethnic pride in a school-wide survey.

RESULTS

Logistic regression analyses indicated that perceived parental disapproval of adolescent smoking and ethnic pride were associated with susceptibility to smoking, ever trying a cigarette, and daily smoking differently for minority and White adolescents. For White youth, high parental disapproval of smoking was protective against all three smoking behaviors whereas ethnic pride was not. For minority youth, the combined protective effect of higher ethnic pride and higher parental disapproval of smoking was protective against all smoking behaviors.

CONCLUSION

The protective role of parental disapproval of smoking and ethnic pride on smoking behaviors may inform culturally sensitive smoking interventions aimed at diverse, multi-ethnic youth, and future studies are needed to examine this.

Exposure to traumatic events and the behavioral health of children enrolled in an early childhood system of care

Children may be exposed to numerous types of traumatic events that can negatively affect their development. The scope to which studies have examined an array of events among young children has been limited, thereby restricting our understanding of exposure and its relationship to behavioral functioning. The current cross-sectional study describes traumatic event exposure in detail and its relationship to behavioral health among an at-risk sample of young children (N = 184), under 6 years of age, upon enrollment into an early childhood, family-based, mental health system of care. Caregivers completed home-based semistructured interviews that covered children's exposure to 24 different types of traumatic events and behavioral and emotional functioning. Findings indicated that nearly 72% of young children experienced 1 or more types of traumatic events. Multiple regression model results showed that exposure was significantly associated with greater behavioral and emotional challenges with children's age, gender, race/ethnicity, household income, and caregiver's education in the model. These findings highlight the prevalence of traumatic exposures among an at-risk sample of young children in a system of care and suggest that this exposure is associated with behavioral and emotional challenges at a young age.

An Examination of Exposure to Traumatic Events and Symptoms and Strengths for Children Served in a Behavioral Health System of Care

The present study examined how exposure to traumatic events impacts children with severe emotional disturbance who are being served in a school-based system of care. Multilevel growth curve models were used to examine the relationships between a child's history of traumatic events (physical abuse, sexual abuse, or domestic violence) and behavioral and emotional strengths, internalizing problem behaviors, or externalizing problem behaviors over 18 months. Results indicate that children receiving services (N = 134) exhibited increased emotional and behavioral strengths and decreased internalizing and externalizing problem behaviors from enrollment to 18 months follow-up. Children with a history of traumatic events improved more slowly than children without such a history on both strengths and internalizing problem behaviors, even after controlling for dosage of services received and other characteristics previously found to predict outcomes. Gender was also related to improvement in internalizing symptoms. Results highlight the continued need to assess the impact of exposure to traumatic events for children served in a system of care.

Tobacco use and suicidality: latent patterns of co-occurrence among black adolescents

INTRODUCTION

Tobacco use is responsible for a considerable portion of the health disparities experienced by Blacks. In addition to its physiological effects, tobacco use has consistently been shown to be associated with suicidality among adolescents. The purpose of the present study is to describe the association between specific patterns of tobacco use behavior and those of suicidality among a nationally representative sample of Black high school students.

METHODS

Responses from Black adolescents (N = 2,931) who completed the 2007 Youth Risk Behavior Surveillance Survey were included. Latent class analysis was utilized to identify typologies based on two domains: (a) lifetime and recent tobacco use and (b) suicidality. The association between tobacco use class membership and suicidality class membership as well as the direct effects of age and gender on class membership was also investigated.

RESULTS

A significant proportion of Black youth reported smoking and suicidal behaviors. A 4-class model provided the best overall fit to the data for tobacco use behavior (nonsmokers, former smokers, light current smokers, and frequent current smokers); a 3-class model provided the best overall fit to the data for suicidality (not suicidal, mild suicidality, suicidal). Smoking status was associated with suicidality class membership, with more intense patterns of smoking related to increased probability of identification with both mild suicidality and being classified as suicidal compared with not suicidal.

CONCLUSIONS

The results of this study indicate that any current smoking status increases the likelihood of suicidality at least 5-fold and provides incentive to target this specific portion of the population of Black adolescent smokers.

Parental Knowledge and Substance Use among African American Adolescents: Influence of Gender and Grade Level

Parental knowledge is defined as parental awareness and information about a child's activities, whereabouts, and associations that is obtained through parental monitoring, parental solicitation, or self-disclosure. Increased parental knowledge is generally associated with lower adolescent substance use; however, the influence of various contextual factors, such as adolescent gender and grade level is not well understood, particularly for different racial or ethnic groups. In the present study, we used Hierarchical Generalized Linear Modeling (HGLM) analyses to examine the longitudinal relationship of parental knowledge to adolescent substance use in the context of adolescent gender and grade level among 207 urban African American adolescents in grades 6-11. Results indicated that increased parental knowledge is associated with a concurrent lower likelihood of substance use across all types of substances examined (alcohol, tobacco, marijuana, other drug use, and any drug use), but it did not predict changes in substance use one year later for the entire sample. However, analyses by gender and grade level showed that for boys and middle school youth, parental knowledge was a protective factor for increases in substance use across one year. Findings are discussed in terms of their implications for prevention and health promotion interventions for adolescent substance use among African American youth.

The impact of youth and family risk factors on service recommendations and delivery in a school-based system of care

The present study examines the impact of child and family risk factors on service access for youth and families in a school-based system of care. Regression analyses examined the relationships between risk factors and services recommended, services received, and dosage of services received. Logistic regression analyses examined the relationship between risk factors and whether or not youth received specific types of services within the system of care. Results revealed that youth with a personal or family history of substance use had more services recommended than youth without these risk factors, while youth with a family history of substance use received more services. Youth with a history of substance use received a significantly higher dosage of services overall. Finally, history of family mental illness was associated with receiving mental health and operational services (e.g., family advocacy, emergency funds). Implications and limitations are discussed.

Risk and protective factors associated with patterns of antisocial behavior among nonmetropolitan adolescents

This study used latent class analysis (LCA) to identify patterns of antisocial behavior (ASB) in a sample of 1,820 adolescents in a nonmetropolitan region of the Northeast. Self-reported ASBs including stealing, fighting, damaging property, and police contact were assessed. LCA identified four classes of ASB including a non-ASB class, a mild, a moderate, and a serious ASB class. Multinomial logistic regression indicated that parent-child relationships served as a protective factor against engaging in ASB and peer, school, and community risk and protective factors differentiated mild patterns of ASB from more intense patterns of involvment. These findings suggest utility in using the LCA to better understand predictors of adolescent ASB to inform more effective prevention and intervention efforts targeting youth who exhibit different patterns of behavior.

Substance use among Asian American adolescents: Influence of race, ethnicity, and acculturation in the context of key risk and protective factors

This study examines the relative influence of race/ethnicity, acculturation, peer substance use, and academic achievement on adolescent substance use among different Asian American ethnic groups and U.S. racial/ethnic groups. Data from the Wave 1 in-home sample of the National Longitudinal Study of Adolescent Health was used to examine lifetime use of alcohol, tobacco, and marijuana in a full adolescent sample of all racial/ethnic groups (N=20,745) and a subsample of Asian American adolescents (N=1,248). Path analysis examined the hypothesized relationships of peer substance use and acculturation as risk factors and academic achievement as a protective factor for racial/ethnic groups. The results indicated that when Asian American adolescents were compared to other major U.S. racial/ethnic groups, peer use and acculturation were both significant mediators of smoking, drinking, and marijuana use, and academic achievement mediated each type of use at a trend level. For Asian American ethnic groups, peer use is a risk factor and, to a lesser extent, academic achievement a protective factor for substance use. Also, although acculturation is a predictor of substance use, when peer use and academic achievement are taken into account, acculturation -- like ethnicity -- no longer predicts use. Mediation analyses indicated that: peer substance use mediates smoking, drinking, and marijuana use; academic achievement does not; and acculturation mediates substance use for some substances and some Asian American ethnic groups. The results are discussed for their implications for understanding how culturally-specific approaches can inform preventive interventions.

Low-dose paclitaxel synergizes with oncolytic adenoviruses via mitotic slippage and apoptosis in ovarian cancer

The microtubule-stabilizing drug paclitaxel has activity in relapsed ovarian cancer. dl922-947, an oncolytic adenovirus with a 24-bp deletion in E1A CR2, replicates selectively within and lyses cells with a dysregulated Rb pathway and has efficacy in ovarian cancer. In the aggressive A2780CP xenograft, combination treatment with weekly dl922-947 and paclitaxel has significantly greater efficacy than either treatment alone and can produce complete tumor eradication in some animals. We investigated the mechanisms of paclitaxel's synergy with dl922-947 in ovarian cancer. The host-cell microtubule network is grossly rearranged and stabilized following adenovirus infection, but paclitaxel does not increase this significantly. Paclitaxel does not synergize by increasing infectivity, viral protein expression or virus release. However, destabilizing the microtubule network with nocodazole reduces viral exit, revealing a novel microtubule-dependent pathway for non-lytic adenoviral exit. dl922-947 can override multiple cell cycle checkpoints but induces cell death by a non-apoptotic mechanism. In combination, dl922-947 and low-dose paclitaxel induces aberrant, multipolar mitoses, mitotic slippage and multinucleation, triggering an apoptotic cell death.

Social-ecological influences on patterns of substance use among non-metropolitan high school students

Patterns of substance use are examined in a sample of over 1,200 youth in a non-metropolitan region of New England. Self-reported history and frequency of alcohol, tobacco, marijuana, inhalants, pain medications, and other hard drug use was assessed for 9th and 10th grade students. Latent class analyses identified four patterns of substance use: non-users (22%), alcohol experimenters (38%), occasional polysubstance users (29%), and frequent polysubstance users (10%). Contextual risk and protective factors in the individual, family, peer, and community domains predicted substance use patterns. Youth report of peer substance use had the largest effects on substance use class membership. Other individual characteristics (e.g., gender, antisocial behavior, academic performance, perceived harm from use), family characteristics (e.g., parental drinking, parental disapproval of youth use), and community characteristics (e.g., availability of substances) demonstrated consistent effects on substance use classes. Implications for prevention are discussed from a social-ecological perspective.