The sinoatrial node extracellular matrix promotes pacemaker phenotype and protects automaticity in engineered heart tissues from cyclic strain.

The composite material-like extracellular matrix (ECM) in the sinoatrial node (SAN) supports the native pacemaking cardiomyocytes (PCMs). To test the roles of SAN ECM in the PCM phenotype and function, we engineered reconstructed-SAN heart tissues (rSANHTs) by recellularizing porcine SAN ECMs with hiPSC-derived PCMs. The hiPSC-PCMs in rSANHTs self-organized into clusters resembling the native SAN and displayed higher expression of pacemaker-specific genes and a faster automaticity compared with PCMs in reconstructed-left ventricular heart tissues (rLVHTs). To test the protective nature of SAN ECMs under strain, rSANHTs and rLVHTs were transplanted onto the murine thoracic diaphragm to undergo constant cyclic strain. All strained-rSANHTs preserved automaticity, whereas 66% of strained-rLVHTs lost their automaticity. In contrast to the strained-rLVHTs, PCMs in strained-rSANHTs maintained high expression of key pacemaker genes (HCN4, TBX3, and TBX18). These findings highlight the promotive and protective roles of the composite SAN ECM and provide valuable insights for pacemaking tissue engineering.

The Efficacy of Modafinil as a Cognitive Enhancer: A Systematic Review and Meta-Analysis.

BACKGROUND: Animal models and human studies have identified the potential of modafinil as a cognitive enhancing agent, independent of its effects on promoting wakefulness in sleep-deprived samples. Given that single-dose applications of other putative memory enhancers (eg, D-cycloserine, yohimbine, and methylene blue) have shown success in enhancing clinical outcomes for anxiety-related disorders, we conducted a meta-analytic review examining the potential for single-dose effects for modafinil on cognitive functioning in non-sleep-deprived adults. METHODS: A total of 19 placebo-controlled trials that examined the effects of single-dose modafinil versus placebo on the cognitive domains of attention, executive functioning, memory, or processing speed were identified, allowing for the calculation of 67 cognitive domain-specific effect sizes. RESULTS: The overall positive effect of modafinil over placebo across all cognitive domains was small and significant (g = 0.10; 95% confidence interval, 0.05-0.15; P < 0.001). No significant differences between cognitive domains were found. Likewise, no significant moderation was found for modafinil dose (100 mg vs 200 mg) or for the populations studied (psychiatric vs nonpsychiatric). CONCLUSIONS: In conclusion, the available evidence indicates only limited potential for modafinil to act as a cognitive enhancer outside sleep-deprived populations.

Homelessness History Impacts on Health Outcomes and Economic and Risk Behavior Intermediaries: New Insights from Population Data.

Using data from the Washington Behavioral Risk Factor Surveillance System, this study assesses the relationship between homelessness history and physical and mental health outcomes as well as between homelessness history and health risk behaviors and economic precariousness as important intermediaries of subsequent health outcomes. Study results indicate that persons with a history of adult homelessness have consistently poorer health outcomes as compared to never homeless persons, and that even after accounting for childhood adversity and social assets, adult homelessness remains a consistent and strong predictor of poor health. These findings indicate that adult homelessness is a key component in understanding cumulative risk and vulnerability. Study results emphasize the importance of considering homelessness history in comprehensive health assessment and intervention services, as well as the utility of using representative public health surveys to understand population trends in housing instability.

Engaging in secondhand smoke reduction discussions with parents of hospitalized pediatric patients: a national survey of pediatric nurses in the United States.

OBJECTIVE: To identify individual- and system-level predictors and barriers associated with US pediatric nurses' routine counseling about child secondhand smoke exposure for parents of hospitalized children. METHODS: In 2008, members of the Society of Pediatric Nurses completed a questionnaire assessing demographic, hospital systems, and work attitudes related to the following outcomes: asking about child secondhand smoke exposure, informing about sources of secondhand smoke exposure, counseling about the dangers of secondhand smoke exposure, and advising a smoke-free home policy. RESULTS: Of 1475 eligible nurses, 888 completed the survey. We found that 39% asked, 43% informed, 29% counseled, and 25% advised parents. Nurses working in hospitals with mandatory prompts in the medical record to assess child secondhand smoke exposure, the availability of written materials for parent smokers, and regular secondhand smoke counseling training for nurses had increased odds of routinely engaging parents in secondhand smoke reduction best practices. Nurses reported parents' resistance to discussions about smoking, short hospital stays, and non-standardized care as the most common barriers to counseling parents. CONCLUSION: System supports in hospitals significantly increases the odds of nurses engaging in child secondhand smoke reduction practices. Strengthening existing systems and introducing new policies are critical for nurses' engagement of parents in discussions about reducing child secondhand smoke exposure.

The teachable moment captured: a framework for nurse-led smoking cessation interventions for parents of hospitalized children.

This article explores the topic of smoking cessation counseling for parents in the context of pediatric hospitalization. Teachable moments, a widely used concept in the literature, uses three key concepts including perception of risk, emotional response, and self-concept to precipitate change (McBride, Health Education Research, 18 [McBride, 2003], 156-170). The interweaving of these concepts with institutional systems; clinically trained personnel; parental smoking considerations; parent presence; and external supports, or collectively the novel idea of the "capturable moment", may allow for an increased rate of parental smoking cessation. Using these concepts, the authors constructed a hospital model for pediatric nursing efforts in parental smoking cessation. The pilot study built on this framework in February 2010 began enrolling parents of hospitalized pediatric patients into two intervention groups to motivate smoking cessation. Starting in September 2010, new electronic medical record-based systems of identifying parents who smoke were implemented in the hopes of enhancing enrollment numbers and streamlining recruitment. It is hoped that by introducing this process and framework, there will be increased national dialogue related to secondhand smoke (SHS) exposure, routine screening for SHS exposure, and nursing recognition of teachable moments.

Addressing cancer disparities via community network mobilization and intersectoral partnerships: a social network analysis.

Community mobilization and collaboration among diverse partners are vital components of the effort to reduce and eliminate cancer disparities in the United States. We studied the development and impact of intersectoral connections among the members of the Massachusetts Community Network for Cancer Education, Research, and Training (MassCONECT). As one of the Community Network Program sites funded by the National Cancer Institute, this infrastructure-building initiative utilized principles of Community-based Participatory Research (CBPR) to unite community coalitions, researchers, policymakers, and other important stakeholders to address cancer disparities in three Massachusetts communities: Boston, Lawrence, and Worcester. We conducted a cross-sectional, sociometric network analysis four years after the network was formed. A total of 38 of 55 members participated in the study (69% response rate). Over four years of collaboration, the number of intersectoral connections reported by members (intersectoral out-degree) increased, as did the extent to which such connections were reported reciprocally (intersectoral reciprocity). We assessed relationships between these markers of intersectoral collaboration and three intermediate outcomes in the effort to reduce and eliminate cancer disparities: delivery of community activities, policy engagement, and grants/publications. We found a positive and statistically significant relationship between intersectoral out-degree and community activities and policy engagement (the relationship was borderline significant for grants/publications). We found a positive and statistically significant relationship between intersectoral reciprocity and community activities and grants/publications (the relationship was borderline significant for policy engagement). The study suggests that intersectoral connections may be important drivers of diverse intermediate outcomes in the effort to reduce and eliminate cancer disparities. The findings support investment in infrastructure-building and intersectoral mobilization in addressing disparities and highlight the benefits of using CBPR approaches for such work.

Smoking cessation counseling for parents during child hospitalization: a national survey of pediatric nurses.

OBJECTIVE: Given the central role played by pediatric nurses in intake assessment, discharge planning, and education for families of hospitalized pediatric patients, a child's hospitalization may provide a unique opportunity for counseling parents about smoking. We sought to determine if hospital policies can support nurses in effectively counseling parents about smoking. DESIGN AND SAMPLE: We conducted a national survey of pediatric staff nurses and administrators/educators who were members of the Society of Pediatric Nurses in 2008 (n=888) to explore counseling practices for tobacco control. MEASURES: Questionnaires included data on demographics, personal and work environment characteristics, hospital policy characteristics, work attitudes and barriers and the main outcome--5As for smoking cessation counseling--Ask, Advise, Assess, Assist, and Arrange. RESULTS: Overall, routine screening for household smokers was most common (43%), followed by advice to quit (25%), assessing willingness to quit (19%), assisting with a quit plan (6%), and arranging follow-up contact (3%). Nurses working in hospitals with admission assessments specifically asking about household members who smoke were 7 times more likely than those without such assessments to routinely ask about smoking (OR: 7.2, 95% CI: 4.9-10.5). CONCLUSION: Future research should test the efficacy of developing comprehensive hospital-wide policies to deliver smoking cessation for parents during a child's hospitalization.

The Boston Health Care for the Homeless Program: a public health framework.

During the past 25 years, the Boston Health Care for the Homeless Program has evolved into a service model embodying the core functions and essential services of public health. Each year the program provides integrated medical, behavioral, and oral health care, as well as preventive services, to more than 11 000 homeless people. Services are delivered in clinics located in 2 teaching hospitals, 80 shelters and soup kitchens, and an innovative 104-bed medical respite unit. We explain the program's principles of care, describe the public health framework that undergirds the program, and offer lessons for the elimination of health disparities suffered by this vulnerable population.

Translating research evidence into practice to reduce health disparities: a social determinants approach.

Translating research evidence to reduce health disparities has emerged as a global priority. The 2008 World Health Organization Commission on Social Determinants of Health recently urged that gaps in health attributable to political, social, and economic factors should be closed in a generation. Achieving this goal requires a social determinants approach to create public health systems that translate efficacy documented by research into effectiveness in the community. We review the scope, definitions, and framing of health disparities and explore local, national, and global programs that address specific health disparities. Such efforts translate research evidence into real-world settings and harness collaborative social action for broad-scale, sustainable change.