Designing for caregiving networks: a case study of primary caregivers of children with medical complexity.

OBJECTIVE: The study aimed to characterize the experiences of primary caregivers of children with medical complexity (CMC) in engaging with other members of the child's caregiving network, thereby informing the design of health information technology (IT) for the caregiving network. Caregiving networks include friends, family, community members, and other trusted individuals who provide resources, information, health, or childcare. MATERIALS AND METHODS: We performed a secondary analysis of two qualitative studies. Primary studies conducted semi-structured interviews (n = 50) with family caregivers of CMC. Interviews were held in the Midwest (n = 30) and the mid-Atlantic region (n = 20). Interviews were transcribed verbatim for thematic analysis. Emergent themes were mapped to implications for the design of future health IT. RESULTS: Thematic analysis identified 8 themes characterizing a wide range of primary caregivers' experiences in constructing, managing, and ensuring high-quality care delivery across the caregiving network. DISCUSSION: Findings evidence a critical need to create flexible and customizable tools designed to support hiring/training processes, coordinating daily care across the caregiving network, communicating changing needs and care updates across the caregiving network, and creating contingency plans for instances where caregivers are unavailable to provide care to the CMC. Informaticists should additionally design accessible platforms that allow primary caregivers to connect with and learn from other caregivers while minimizing exposure to sensitive or emotional content as indicated by the user. CONCLUSION: This article contributes to the design of health IT for CMC caregiving networks by uncovering previously underrecognized needs and experiences of CMC primary caregivers and drawing direct connections to design implications.

Adaptive Intervention to Prevent Respiratory Illness in Cerebral Palsy: Protocol for a Feasibility Pilot Randomized Controlled Trial.

BACKGROUND: This study will pilot-test an innovative just-in-time adaptive intervention to reduce severe respiratory illness among children with severe cerebral palsy (CP). Our intervention program, Respiratory Exacerbation-Plans for Action and Care Transitions (RE-PACT), delivers timely customized action planning and rapid clinical response when hospitalization risk is elevated. OBJECTIVE: This study aims to establish RE-PACT's feasibility, acceptability, and fidelity in up to 90 children with severe CP. An additional aim is to preliminarily estimate RE-PACT's effect size. METHODS: The study will recruit up to 90 caregivers of children with severe CP aged 0 to 17 years who are cared for by a respiratory specialist or are receiving daily respiratory treatments. Participants will be recruited from pediatric complex care programs at the University of Wisconsin-Madison (UW) and the University of California, Los Angeles (UCLA). Study participants will be randomly assigned to receive usual care through the complex care clinical program at UW or UCLA or the study intervention, RE-PACT. The intervention involves action planning, rapid clinical response to prevent and manage respiratory illness, and weekly SMS text messaging surveillance of caregiver confidence for their child to avoid hospitalization. RE-PACT will be run through 3 successively larger 6-month trial waves, allowing ongoing protocol refinement according to prespecified definitions of success for measures of feasibility, acceptability, and fidelity. The feasibility measures include recruitment and intervention time. The acceptability measures include recruitment and completion rates as well as intervention satisfaction. The fidelity measures include observed versus expected rates of intervention and data collection activities. The primary clinical outcome is a severe respiratory illness, defined as a respiratory diagnosis requiring hospitalization. The secondary clinical outcomes include hospital days and emergency department visits, systemic steroid courses, systemic antibiotic courses, and death from severe respiratory illness. RESULTS: The recruitment of the first wave began on April 27, 2022. To date, we have enrolled 30 (33%) out of 90 participants, as projected. The final wave of recruitment will end by October 31, 2023, and the final participant will complete the study by April 30, 2024. We will start analyzing the complete responses by April 30, 2024, and the publication of results is expected at the end of 2024. CONCLUSIONS: This pilot intervention, using adaptive just-in-time strategies, represents a novel approach to reducing the incidence of significant respiratory illness for children with severe CP. This protocol may be helpful to other researchers and health care providers caring for patients at high risk for acute severe illness exacerbations. TRIAL REGISTRATION: ClinicalTrials.gov NCT05292365; https://clinicaltrials.gov/study/NCT05292365. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/49705.

An mHealth Design to Promote Medication Safety in Children with Medical Complexity.

BACKGROUND: Children with medical complexity (CMC) are uniquely vulnerable to medication errors and preventable adverse drug events because of their extreme polypharmacy, medical fragility, and reliance on complicated medication schedules and routes managed by undersupported family caregivers. There is an opportunity to improve CMC outcomes by designing health information technologies that support medication administration accuracy, timeliness, and communication within CMC caregiving networks. OBJECTIVES: The present study engaged family caregivers, secondary caregivers, and clinicians who work with CMC in a codesign process to identify: (1) medication safety challenges experienced by CMC caregivers and (2) design requirements for a mobile health application to improve medication safety for CMC in the home. METHODS: Study staff recruited family caregivers, secondary caregivers, and clinicians from a children's hospital-based pediatric complex care program to participate in virtual codesign sessions. During sessions, the facilitator-guided codesigners in generating and converging upon medication safety challenges and design requirements. Between sessions, the research team reviewed notes from the session to identify design specifications and modify the prototype. After design sessions concluded, each session recording was reviewed to confirm that all designer comments had been captured. RESULTS: A total of N = 16 codesigners participated. Analyses yielded 11 challenges to medication safety and 11 corresponding design requirements that fit into three broader challenges: giving the right medication at the right time; communicating with others about medications; and accommodating complex medical routines. Supporting quotations from codesigners and prototype features associated with each design requirement are presented. CONCLUSION: This study generated design requirements for a tool that may improve medication safety by creating distributed situation awareness within the caregiving network. The next steps are to pilot test tools that integrate these design requirements for usability and feasibility, and to conduct a randomized control trial to determine if use of these tools reduces medication errors.

A Supportive Heart Failure Care Program to Reduce Hospital Readmissions.

In the United States, heart failure (HF) is the leading reason for hospital readmissions, with 27% of Medicare recipients with HF being readmitted within 30 days The purpose of this quality improvement project was to decrease HF readmissions during their first 30 days of care with our home health agency. The Supportive Heart Failure Care education program was based on the results of a population assessment and included establishment of agency-wide best practices, nursing education sessions, and implementation of best practices focused on evidence-based self-management. After implementation of this project, the hospital readmission rate decreased from 32% to 21%. The nurses who completed the education sessions (N = 35) showed an increase in knowledge of 4.1% from pre-test scores. However, chart audits showed varying levels of documented practice in alignment with best practices. Although results of this project showed a small improvement in nurse knowledge and varied changes to documented practice, the overall project goal of decreasing hospital readmissions was achieved. Understanding individual and systems-level barriers to translating education to practice is needed to better meet the needs of home health nurses and the HF patients they serve.

Barriers to and facilitators of a just-in-time adaptive intervention for respiratory illness in cerebral palsy: a qualitative study.

OBJECTIVE: To understand caregiver, healthcare professional and national expert perspectives on implementation of a just-in-time adaptive intervention, RE-PACT (Respiratory Exacerbation-Plans for Action and Care Transitions) to prevent respiratory crises in severe cerebral palsy. DESIGN: Qualitative research study. SETTING: Paediatric complex care programmes at two academic medical institutions. PARTICIPANTS: A total of n=4 focus groups were conducted with caregivers of children with severe cerebral palsy and chronic respiratory illness, n=4 with healthcare professionals, and n=1 with national experts. METHODS: Participants viewed a video summarising RE-PACT, which includes action planning, mobile health surveillance of parent confidence to avoid hospitalisation and rapid clinical response at times of low confidence. Moderated discussion elicited challenges and benefits of RE-PACT's design, and inductive thematic analysis elicited implementation barriers and facilitators. RESULTS: Of the 19 caregivers recruited, nearly half reported at least one hospitalisation for their child in the prior year. Healthcare professionals and national experts (n=26) included physicians, nurses, respiratory therapists, social workers and researchers. Four overarching themes and their barriers/facilitators emphasised the importance of design and interpersonal relationships balanced against health system infrastructure constraints. Intervention usefulness in crisis scenarios relies on designing action plans for intuitiveness and accuracy, and mobile health surveillance tools for integration into daily life. Trust, knowledge, empathy and adequate clinician capacity are essential components of clinical responder-caregiver relationships. CONCLUSIONS: RE-PACT's identified barriers are addressable. Just-in-time adaptive interventions for cerebral palsy appear well-suited to address families' need to tailor intervention content to levels of experience, preference and competing demands.

School Attendance Decisions for Children With Medical Complexity During COVID-19.

OBJECTIVE: School attendance by children with medical complexity (CMC) may be influenced by parent perceptions of their child's risk for coronavirus disease 2019 (COVID-19). The authors of this study aimed to quantify in-person school attendance and identify attendance predictors. METHODS: From June to August 2021, surveys were collected from English- and Spanish-speaking parents of children aged 5 to 17 years with ≥1 complex chronic condition who received care at an academic tertiary children's hospital in the Midwestern United States and who attended school prepandemic. The outcome, in-person attendance, was defined dichotomously as any in-person attendance versus none. We evaluated parent-perceived school attendance benefits, barriers, motivation, and cues, COVID-19 severity and susceptibility using survey items derived from the health belief model (HBM). Latent HBM constructs were estimated with exploratory factor analysis. Associations between the outcome and the HBM were evaluated with multivariable logistic regression and structural equation models. RESULTS: Among 1330 families (response rate 45%), 19% of CMC were not attending in-person school. Few demographic and clinical variables predicted school attendance. In adjusted models, family-perceived barriers, motivation, and cues predicted in-person attendance, whereas benefits, susceptibility, and severity did not. The predicted probability (95% confidence interval) of attendance ranged from 80% (70% to 87%) for high perceived barriers to 99% (95% to 99%) for low perceived barriers. Younger age (P <.01) and previous COVID-19 infection (P = .02) also predicted school attendance. CONCLUSIONS: Overall, 1 in 5 CMC did not attend school at the end of the 2020 to 2021 academic year. Family perceptions of schools' mitigation policies and encouragement of attendance may be promising avenues to address this disparity.

Interventions in the Home and Community for Medically Complex Children: A Systematic Review.

CONTEXT: Most care occurs in home and community settings; however, the best approaches to improve CMC health are poorly understood. OBJECTIVE: We sought to summarize evidence from interventions in the home and community to improve health for children with medical complexity (CMC) using comprehensive conceptions of CMC health. DATA SOURCES: PubMed, CINAHL, Scopus, and Cochrane databases. STUDY SELECTION: Included studies evaluated interventions for CMC caregivers in home or community settings and evaluated at least 1 outcome in 10 domains of CMC health. DATA EXTRACTION: Data were extracted on participant characteristics, intervention activities, and outcomes. Interventions were categorized thematically into strategies, with results summarized by effects on outcomes within each health domain. RESULTS: The 25 included interventions used 5 strategies: intensive caregiver education (n = 18), support groups (n = 3), crisis simulation (n = 2), mobile health tracking (n = 1), and general education (n = 1). Substantial variation existed in the extent to which any outcome domain was studied (range 0-22 studies per domain). Interventions addressing 4 domains showed consistent improvement: support group and mobile health tracking improved long-term child and caregiver self-sufficiency; mobile health tracking improved family-centered care; intensive caregiver education and support groups improved community system supports. Three domains (basic needs, inclusive education, patient-centered medical home) were not studied. LIMITATIONS: Risk of bias was moderate due primarily to limited controlled experimental designs and heterogeneous population and outcome definitions. CONCLUSIONS: Interventions that improve CMC health exist; however, current studies focus on limited segments of the 10 domains framework. Consensus outcome measures for CMC health are needed.

What makes a home? Designing home personas to represent the homes of families caring for children with medical complexity.

Personas are widely recognized as valuable design tools for communicating dimensions of individuals, yet they often lack critical contextual factors. For those people managing chronic health conditions, the home is a critical context of their patient work system (PWS). We propose the development of 'home personas' to convey essential aspects of the home context to those tasked with designing technologies and interventions to fit it. We used an iterative, multi-stakeholder design process to design 'home personas' for a model population, families caring for children with medical complexity. Each of the four resultant home personas-Multi-level, Customized, Ranch, and Rental-has a unique home layout, pain points, and are described on three dimensions that emerged from the data. This study builds on a foundation of work in the emerging field of Patient Ergonomics, describing a mechanism for distilling rich descriptions of the PWS into brief yet informative design tools.

In-Home COVID-19 Testing for Children With Medical Complexity: Feasibility and Association With School Attendance and Safety Perceptions.

The REstarting Safe Education and Testing program for children with medical complexity was implemented in May 2021 at the University of Wisconsin to evaluate the feasibility of in-home rapid antigen COVID-19 testing among neurocognitively affected children. Parents or guardians administered BinaxNOW rapid antigen self-tests twice weekly for three months and changed to symptom and exposure testing or continued surveillance. In-home testing was feasible: nearly all (92.5%) expected tests were conducted. Symptomatic testing identified seven of nine COVID-19 cases. School safety perceptions were higher among those opting for symptom testing. Clinical Trials.gov identifier: NCT04895085. (Am J Public Health. 2022;112(S9):S878-S882. https://doi.org/10.2105/AJPH.2022.306971).

Caregiver perceptions of in-home COVID-19 testing for children with medical complexity: a qualitative study.

BACKGROUND: In-home direct antigen rapid testing (DART) plays a major role in COVID-19 mitigation and policy. However, perceptions of DART within high-risk, intellectually impaired child populations are unknown. This lack of research could negatively influence DART uptake and utility among those who stand to benefit most from DART. The purpose of this study was to describe caregivers' perceptions of an in-home COVID-19 DART regimen in children with medical complexity, including the benefits and limitations of DART use. METHODS: This qualitative study was a subproject of the NIH Rapid Acceleration of Diagnostics Underserved Populations research program at the University of Wisconsin. We combined survey data and the thematic analysis of semi-structured interview data to understand caregivers' perceptions of in-home COVID-19 testing and motivators to perform testing. Caregivers of children with medical complexity were recruited from the Pediatric Complex Care Program at the University of Wisconsin (PCCP). Data were collected between May and August 2021. RESULTS: Among n = 20 caregivers, 16/20 (80%) of their children had neurologic conditions and 12/20 (60%) used home oxygen. Survey data revealed that the largest caregiver motivators to test their child were to get early treatment if positive (18/20 [90%] of respondents agreed) and to let the child's school know if the child was safe to attend (17/20 [85%] agreed). Demotivators to testing included that the child could still get COVID-19 later (7/20 [35%] agreed), and the need for officials to reach out to close contacts (6/20 [30%] agreed). From interview data, four overarching themes described perceptions of in-home COVID-19 testing: Caregivers perceived DART on a spectrum of 1) benign to traumatic and 2) simple to complex. Caregivers varied in the 3) extent to which DART contributed to their peace of mind and 4) implications of test results for their child. CONCLUSIONS: Although participants often described DART as easy to administer and contributing to peace of mind, they also faced critical challenges and limitations using DART. Future research should investigate how to minimize the complexity of DART within high-risk populations, while leveraging DART to facilitate safe school attendance for children with medical complexity and reduce caregiver burden.

COVID-19 Vaccination Intentions for Children With Medical Complexity.

OBJECTIVES: The chronic conditions and functional limitations experienced by children with medical complexity (CMC) place them at disproportionate risk for COVID-19 transmission and poor outcomes. To promote robust vaccination uptake, specific constructs associated with vaccine hesitancy must be understood. Our objective was to describe demographic, clinical, and vaccine perception variables associated with CMC parents' intention to vaccinate their child against COVID-19. METHODS: We conducted a cross-sectional survey (June-August 2021) for primary caregivers of CMC between ages 5 to 17 at an academic medical center in the Midwest. Multivariable logistic regression examined associations between vaccination intent and selected covariates. RESULTS: Among 1330 families, 65.8% indicated vaccination intent. In multivariable models, demographics had minimal associations with vaccination intent; however, parents of younger children (<12 years) had significantly lower adjusted odds of vaccination intent (adjusted odds ratio [95% confidence interval]: 0.26 [0.17-0.3]) compared to parents of older children (≥12 years). CMC with higher severity of illness, ie, those with ≥1 hospitalization in the previous year (versus none) or >1 complex chronic condition (vs 1), had higher adjusted odds of vaccination intent (1.82 [1.14-2.92] and 1.77 [1.16-2.71], respectively). Vaccine perceptions associated with vaccine intention included "My doctor told me to get my child a COVID-19 vaccine" (2.82 [1.74-4.55]); and "I'm concerned about my child's side effects from the vaccine" (0.18 [0.12-0.26]). CONCLUSIONS: One-third of CMC families expressed vaccine hesitation; however, constructs strongly associated with vaccination intent are potentially modifiable. Pediatrician endorsement of COVID-19 vaccination and careful counseling on side effects might be promising strategies to encourage uptake.

Feasibility Testing of Tubes@HOME: A Mobile Application to Support Family-Delivered Enteral Care.

BACKGROUND: Assistance from medical devices is common for children with medical complexity (CMC) but introduces caregiving challenges. We tested the feasibility of "Tubes@HOME," a mobile application supporting CMC family-delivered care using enteral care as a model. METHODS: Caregivers of CMC with enteral tubes participated in a 30-day feasibility study of Tubes@HOME November 2020 through January 2021. Tubes@HOME was available on mobile devices and designed to support collaborative care and tracking over time. Key features include child profile, caregiving network management, care routines, feedback loop, and action plans. Care routines delineated nutrition, medication, and procedural tasks needed for the child: frequencies, completions, and reminders. Metadata summarized feature use among users. Feasibility was evaluated with postuse questionnaires and interviews. Measures of Tubes@HOME's usability and usefulness included the NASA Task Load Index (TLX), System Usability Scale (SUS), and Acceptability and Use of Technology Questionnaire (AUTQ). RESULTS: Among n = 30 children, there were 30 primary (eg, parent) and n = 22 nonprimary caregivers using Tubes@HOME. Children had a median (IQR) 10 (5.5-13) care routines created. For care routines created, 93% were marked complete at least once during the study period, with participants engaging with routines throughout study weeks 2 to 4. Results (mean [SD]) indicated low mental workload (TLX) 30.9 (12.2), good usability (SUS) 75.4 (14.7), and above-average usefulness (AUTQ) 4.0 (0.7) associated with Tubes@HOME, respectively. Interviews contextualized usefulness and suggested improvements. CONCLUSIONS: Longitudinal use of Tubes@HOME among caregiving networks appeared feasible. Efficacy testing is needed, and outcomes could include reliability of care delivered in home and community.

Priorities for Safer In-Person School for Children With Medical Complexity During COVID-19.

OBJECTIVES: To establish statewide consensus priorities for safer in-person school for children with medical complexity (CMC) during the coronavirus disease 2019 (COVID-19) pandemic using a rapid, replicable, and transparent priority-setting method. METHODS: We adapted the Child Health and Nutrition Research Initiative Method, which allows for crowdsourcing ideas from diverse stakeholders and engages technical experts in prioritizing these ideas using predefined scoring criteria. Crowdsourcing surveys solicited ideas from CMC families, school staff, clinicians and administrators through statewide distribution groups/listservs using the prompt: "It is safe for children with complex health issues and those around them (families, teachers, classmates, etc.) to go to school in-person during the COVID-19 pandemic if/when…" Ideas were aggregated and synthesized into a unique list of candidate priorities. Thirty-four experts then scored each candidate priority against 5 criteria (equity, impact on COVID-19, practicality, sustainability, and cost) using a 5-point Likert scale. Scores were weighted and predefined thresholds applied to identify consensus priorities. RESULTS: From May to June 2021, 460 stakeholders contributed 1166 ideas resulting in 87 candidate priorities. After applying weighted expert scores, 10 consensus CMC-specific priorities exceeded predetermined thresholds. These priorities centered on integrating COVID-19 safety and respiratory action planning into individualized education plans, educating school communities about CMC's unique COVID-19 risks, using medical equipment safely, maintaining curricular flexibility, ensuring masking and vaccination, assigning seats during transportation, and availability of testing and medical staff at school. CONCLUSIONS: Priorities for CMC, identified by statewide stakeholders, complement and extend existing recommendations. These priorities can guide implementation efforts to support safer in-person education for CMC.

Medical Device Workarounds in Providing Care for Children With Medical Complexity in the Home.

OBJECTIVES: Children with medical complexity (CMC) are commonly assisted by medical devices, which family caregivers are responsible for managing and troubleshooting in the home. Optimizing device use by maximizing the benefits and minimizing the complications is a critical goal for CMC but is relatively unexplored. In this study, we sought to identify and describe workarounds families have developed to optimize medical device use for their needs. METHODS: We conducted 30 contextual inquiry interviews with families of CMC in homes. Interviews were recorded, transcribed, and analyzed for barriers and workarounds specific to medical device usage through a directed content analysis. We used observation notes and photographs to confirm and elaborate on interview findings. RESULTS: We identified 4 barriers to using medical devices in the home: (1) the quantity and type of devices allotted do not meet family needs, (2) the device is not designed to be used in locations families require, (3) device use is physically or organizationally disruptive to the home, and (4) the device is not designed to fit the user. We also identified 11 categories of workarounds to the barriers. CONCLUSIONS: Families face many barriers in using medical devices to care for CMC. Our findings offer rich narrative and photographic data revealing the ways in which caregivers work around these barriers. Future researchers should explore the downstream effects of these ubiquitous, necessary workarounds on CMC outcomes toward developing interventions that optimize device use for families.

Codesign and Usability Testing of a Mobile Application to Support Family-Delivered Enteral Tube Care.

BACKGROUND: Enteral tubes are prevalent among children with medical complexity (CMC), and complications can lead to costly health care use. Our objective was to design and test the usability of a mobile application (app) to support family-delivered enteral tube care. METHODS: Human-centered design methods (affinity diagramming, persona development, and software development) were applied with family caregivers of CMC to develop a prototype. During 3 waves of usability testing with design refinement between waves, screen capture software collected user-app interactions and inductive content analysis of narrative feedback identified areas for design improvement. The National Aeronautics and Space Administration Task Load Index and the System Usability Scale quantified mental workload and ease of use. RESULTS: Design participants identified core app functions, including displaying care routines, reminders, tracking inventory and health data, caregiver communication, and troubleshooting. Usability testing participants were 80% non-Hispanic white, 28% lived in rural settings, and 20% had not completed high school. Median years providing enteral care was 2 (range 1-14). Design iterations improved app function, simplification, and user experience. The mean System Usability Scale score was 76, indicating above-average usability. National Aeronautics and Space Administration Task Load Index revealed low mental demand, frustration, and effort. All 14 participants reported that they would recommend the app, and that the app would help with organization, communication, and caregiver transitions. CONCLUSIONS: Using a human-centered codesign process, we created a highly usable mobile application to support enteral tube caregiving at home. Future work involves evaluating the feasibility of longitudinal use and effectiveness in improving self-efficacy and reduce device complications.

Intervention to Prevent Falls: Community-Based Clinics.

PURPOSE: The purpose of this study was to document results of State funded fall prevention clinics on rates of self-reported falls and fall-related use of health services. METHODS: Older adults participated in community-based fall prevention clinics providing individual assessments, interventions, and referrals to collaborating community providers. A pre-post design compares self-reported 6-month fall history and fall-related use of health care before and after clinic attendance. RESULTS: Participants ( N = 751) were predominantly female (82%) averaging 81 years of age reporting vision (75%) and mobility (57%) difficulties. Assessments revealed polypharmacy (54%), moderate- to high-risk mobility issues (39%), and postural hypotension (10%). Self-reported preclinic fall rates were 256/751(34%) and postclinic rates were 81/751 (10.8%), ( p = .0001). Reported use of fall-related health services, including hospitalization, was also significantly lower after intervention. IMPLICATIONS: Evidence-based assessments, risk-reducing recommendations, and referrals that include convenient exercise opportunities may reduce falls and utilization of health care services. Estimates regarding health care spending and policy are presented.

Psychodynamic treatment, training, and supervision using internet-based technologies.

For several years, the China American Psychoanalytic Alliance (CAPA) has provided treatment, training, and supervision to Chinese mental health professionals over the Internet. The lack of Chinese analysts and mentors has created an intense demand for psychodynamic psychotherapy training and treatment that CAPA is addressing using Skype™ and other distance communication technologies. This article describes the project, its history, scope, and activities, and the experiences of CAPA teachers and clinicians in exploring and developing the usefulness and power of this very new teaching method. Some particular characteristics of Chinese culture have become apparent as a result of the teaching experience. Aspects of the transference and countertransference that are shaped by the virtual nature of the technology are discussed, using case material. Our hope is that, in helping to train our Chinese students in psychodynamic psychotherapy, they will go on to train future generations of clinicians. This model of teaching and training could also be applied in other underserved areas.

An open-label study of naltrexone and bupropion combination therapy for smoking cessation in overweight and obese subjects.

A combination of sustained release (SR) naltrexone (32 mg/day) and bupropion SR (360 mg/day) plus behavioral counseling was evaluated for the treatment of smoking cessation and mitigation of nicotine withdrawal and weight gain. Thirty overweight or obese nicotine-dependent subjects were enrolled in a 24-week, open-label study; 85% and 63% completed 12 and 2 4weeks, respectively. The target quit date was Week 4. Week 4-12 continuous abstinence rate was 48%, 78% of subjects achieved CO < or = 10 ppm, serum cotinine decreased from 185 to 48 microg/L, and tobacco use decreased from 129 to 14 cigarettes/week. Similar results were seen at Week 24. Body weight was essentially unchanged (Week 12: -0.1%; Week 24: +0.4%). Except for a transient significant increase 1 week after the target quit date (p<0.05), nicotine withdrawal scores did not change. The most common adverse events were nausea, insomnia, and constipation. These tended to be transient and mild or moderate in severity. In overweight or obese smokers, naltrexone/bupropion combination therapy with behavioral counseling was associated with decreased nicotine use, limited nicotine withdrawal symptoms, and no significant weight gain.

Inhibition of MCF-7 breast cancer cell proliferation by MCF-10A breast epithelial cells in coculture.

A coculture system was developed to investigate the interactions between MCF-10A breast epithelial cells and MCF-7 breast cancer cells stably expressing the green fluorescent protein (MCF-7-GFP). Studies with this MCF-10A/MCF-7-GFP coculture system on microtiter plates and on reconstituted basement membrane (Matrigel), revealed paracrine inhibition of MCF-7-GFP cell proliferation. Epidermal growth factor, which in monocultures modestly enhanced MCF-7-GFP and markedly increased MCF-10A cell proliferation, greatly inhibited MCF-7-GFP cell proliferation in MCF-10A/MCF-7-GFP cocultures. 17beta-Estradiol, which stimulated MCF-7-GFP but not MCF-10A cell proliferation in monoculture, inhibited MCF-7-GFP cell proliferation in MCF-10A/MCF-7-GFP cocultures, an effect that was blocked by the antiestrogen, ICI 182,780. On Matrigel, complex MCF-10A/MCF-7-GFP cellular interactions were observed in real time that resulted in the formation of acinus-like structures. These results indicate a role of normal epithelial cells in inhibiting tumor-cell proliferation and demonstrate the utility of this coculture system as a model of early paracrine control of breast cancer.