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1.
Am J Epidemiol ; 193(3): 489-499, 2024 Feb 05.
Artigo em Inglês | MEDLINE | ID: mdl-37939151

RESUMO

We aimed to compare rates and characteristics of suicide mortality in formerly incarcerated people with those of the general population in North Carolina. We conducted a retrospective cohort study of 266,400 people released from North Carolina state prisons between January 1, 2000, and March 1, 2020. Using direct and indirect standardization by age, sex, and calendar year, we calculated standardized suicide mortality rates and standardized mortality ratios comparing formerly incarcerated people with the North Carolina general population. We evaluated effect modification by race/ethnicity, sex, age, and firearm involvement. Formerly incarcerated people had approximately twice the overall suicide mortality of the general population for 3 years after release, with the highest rate of suicide mortality being observed in the 2-week period after release. In contrast to patterns in the general population, formerly incarcerated people had higher rates of non-firearm-involved suicide mortality than firearm-involved suicide mortality. Formerly incarcerated female, White and Hispanic/Latino, and emerging adult people had a greater elevation of suicide mortality than their general-population peers compared with other groups. These findings suggest a need for long-term support for formerly incarcerated people as they return to community living and a need to identify opportunities for interventions that reduce the harms of incarceration for especially vulnerable groups. This article is part of a Special Collection on Mental Health.


Assuntos
Prisioneiros , Suicídio , Adulto , Humanos , Feminino , North Carolina/epidemiologia , Estudos Retrospectivos , Causas de Morte
2.
Pharmacoepidemiol Drug Saf ; 32(5): 577-585, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-36585827

RESUMO

BACKGROUND: In the US, over 200 lives are lost from opioid overdoses each day. Accurate and prompt diagnosis of opioid use disorders (OUD) may help prevent overdose deaths. However, international classification of disease (ICD) codes for OUD are known to underestimate prevalence, and their specificity and sensitivity are unknown. We developed and validated algorithms to identify OUD in electronic health records (EHR) and examined the validity of OUD ICD codes. METHODS: Through four iterations, we developed EHR-based OUD identification algorithms among patients who were prescribed opioids from 2014 to 2017. The algorithms and OUD ICD codes were validated against 169 independent "gold standard" EHR chart reviews conducted by an expert adjudication panel across four healthcare systems. After using 2014-2020 EHR for validating iteration 1, the experts were advised to use 2014-2017 EHR thereafter. RESULTS: Of the 169 EHR charts, 81 (48%) were reviewed by more than one expert and exhibited 85% expert agreement. The experts identified 54 OUD cases. The experts endorsed all 11 OUD criteria from the Diagnostic and Statistical Manual of Mental Disorders-5, including craving (72%), tolerance (65%), withdrawal (56%), and recurrent use in physically hazardous conditions (50%). The OUD ICD codes had 10% sensitivity and 99% specificity, underscoring large underestimation. In comparison our algorithm identified OUD with 23% sensitivity and 98% specificity. CONCLUSIONS AND RELEVANCE: This is the first study to estimate the validity of OUD ICD codes and develop validated EHR-based OUD identification algorithms. This work will inform future research on early intervention and prevention of OUD.


Assuntos
Overdose de Drogas , Transtornos Relacionados ao Uso de Opioides , Humanos , Analgésicos Opioides/uso terapêutico , Registros Eletrônicos de Saúde , Transtornos Relacionados ao Uso de Opioides/diagnóstico , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/prevenção & controle , Atenção à Saúde , Overdose de Drogas/epidemiologia , Algoritmos
3.
Pain Med ; 24(Suppl 1): S3-S12, 2023 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-36622041

RESUMO

In 2019, the National Health Interview survey found that nearly 59% of adults reported pain some, most, or every day in the past 3 months, with 39% reporting back pain, making back pain the most prevalent source of pain, and a significant issue among adults. Often, identifying a direct, treatable cause for back pain is challenging, especially as it is often attributed to complex, multifaceted issues involving biological, psychological, and social components. Due to the difficulty in treating the true cause of chronic low back pain (cLBP), an over-reliance on opioid pain medications among cLBP patients has developed, which is associated with increased prevalence of opioid use disorder and increased risk of death. To combat the rise of opioid-related deaths, the National Institutes of Health (NIH) initiated the Helping to End Addiction Long-TermSM (HEAL) initiative, whose goal is to address the causes and treatment of opioid use disorder while also seeking to better understand, diagnose, and treat chronic pain. The NIH Back Pain Consortium (BACPAC) Research Program, a network of 14 funded entities, was launched as a part of the HEAL initiative to help address limitations surrounding the diagnosis and treatment of cLBP. This paper provides an overview of the BACPAC research program's goals and overall structure, and describes the harmonization efforts across the consortium, define its research agenda, and develop a collaborative project which utilizes the strengths of the network. The purpose of this paper is to serve as a blueprint for other consortia tasked with the advancement of pain related science.


Assuntos
Dor Crônica , Dor Lombar , Transtornos Relacionados ao Uso de Opioides , Adulto , Humanos , Projetos de Pesquisa , Analgésicos Opioides/uso terapêutico , Comitês Consultivos , Medição da Dor/métodos , Dor Crônica/epidemiologia , Dor Lombar/diagnóstico , Dor Lombar/terapia , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/terapia
4.
Inj Prev ; 29(2): 180-185, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-36600665

RESUMO

BACKGROUND: Natural disasters are associated with increased mental health disorders and suicidal ideation; however, associations with suicide deaths are not well understood. We explored how Hurricane Florence, which made landfall in September 2018, may have impacted suicide deaths in North Carolina (NC). METHODS: We used publicly available NC death records data to estimate associations between Hurricane Florence and monthly suicide death rates using a controlled, interrupted time series analysis. Hurricane exposure was determined by using county-level support designations from the Federal Emergency Management Agency. We examined effect modification by sex, age group, and race/ethnicity. RESULTS: 8363 suicide deaths occurred between January 2014 and December 2019. The overall suicide death rate in NC between 2014 and 2019 was 15.53 per 100 000 person-years (95% CI 15.20 to 15.87). Post-Hurricane, there was a small, immediate increase in the suicide death rate among exposed counties (0.89/100 000 PY; 95% CI -2.69 to 4.48). Comparing exposed and unexposed counties, there was no sustained post-Hurricane Florence change in suicide death rate trends (0.02/100 000 PY per month; 95% CI -0.33 to 0.38). Relative to 2018, NC experienced a statewide decline in suicides in 2019. An immediate increase in suicide deaths in Hurricane-affected counties versus Hurricane-unaffected counties was observed among women, people under age 65 and non-Hispanic black individuals, but there was no sustained change in the months after Hurricane Florence. CONCLUSIONS: Although results did not indicate a strong post-Hurricane Florence impact on suicide rates, subgroup analysis suggests differential impacts of Hurricane Florence on several groups, warranting future follow-up.


Assuntos
Tempestades Ciclônicas , Suicídio , Humanos , Feminino , Idoso , North Carolina/epidemiologia , Análise de Séries Temporais Interrompida , Ideação Suicida
5.
Am J Public Health ; 112(6): 923-930, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35446610

RESUMO

Objectives. To assess linkages of patient data from a health care system in the southeastern United States to microdata from the American Community Survey (ACS) with the goal of better understanding health disparities and social determinants of health in the population. Methods. Once a data use agreement was in place, a stratified random sample of approximately 200 000 was drawn of patients aged 25 to 74 years with at least 2 visits between January 1, 2016, and December 31, 2019. Information from the sampled electronic health records (EHRs) was transferred securely to the Census Bureau, put through the Census Person Identification Validation System to assign Protected Identification Keys (PIKs) as unique identifiers wherever possible. EHRs with PIKs assigned were then linked to 2001-2017 ACS records with a PIK. Results. PIKs were assigned to 94% of the sampled patients. Of patients with PIKs, 15.5% matched to persons sampled in the ACS. Conclusions. Linking data from EHRs to ACS records is feasible and, with adjustments for differential coverage, will advance understanding of social determinants and enhance the ability of integrated delivery systems to reflect and affect the health of the populations served. (Am J Public Health. 2022;112(6):923-930. https://doi.org/10.2105/AJPH.2022.306783).


Assuntos
Prestação Integrada de Cuidados de Saúde , Registros Eletrônicos de Saúde , Censos , Estudos de Viabilidade , Humanos , Sudeste dos Estados Unidos , Estados Unidos
6.
Inj Prev ; 2022 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-35701110

RESUMO

BACKGROUND: Suicide deaths have been increasing for the past 20 years in the USA resulting in 45 979 deaths in 2020, a 29% increase since 1999. Lack of data linkage between entities with potential to implement large suicide prevention initiatives (health insurers, health institutions and corrections) is a barrier to developing an integrated framework for suicide prevention. OBJECTIVES: Data linkage between death records and several large administrative datasets to (1) estimate associations between risk factors and suicide outcomes, (2) develop predictive algorithms and (3) establish long-term data linkage workflow to ensure ongoing suicide surveillance. METHODS: We will combine six data sources from North Carolina, the 10th most populous state in the USA, from 2006 onward, including death certificate records, violent deaths reporting system, large private health insurance claims data, Medicaid claims data, University of North Carolina electronic health records and data on justice involved individuals released from incarceration. We will determine the incidence of death from suicide, suicide attempts and ideation in the four subpopulations to establish benchmarks. We will use a nested case-control design with incidence density-matched population-based controls to (1) identify short-term and long-term risk factors associated with suicide attempts and mortality and (2) develop machine learning-based predictive algorithms to identify individuals at risk of suicide deaths. DISCUSSION: We will address gaps from prior studies by establishing an in-depth linked suicide surveillance system integrating multiple large, comprehensive databases that permit establishment of benchmarks, identification of predictors, evaluation of prevention efforts and establishment of long-term surveillance workflow protocols.

7.
Health Expect ; 25(4): 1643-1651, 2022 08.
Artigo em Inglês | MEDLINE | ID: mdl-35678017

RESUMO

BACKGROUND: The preferences of autism stakeholders regarding the top priorities for future autism research are largely unknown. OBJECTIVE: This study had two objectives: First, to examine what autism stakeholders think new research investments should be and the attributes of investment that they consider important, and second, to explore the feasibility, acceptability and outcomes of two prioritization exercises among autism stakeholders regarding their priorities for future research in autism. DESIGN: This was  a prospective stakeholder-engaged iterative study consisting of best-worst scaling (BWS) and direct prioritization exercise. SETTING AND PARTICIPANTS: A national snowball sample of 219 stakeholders was included: adults with autism, caregivers, service providers and researchers. MAIN OUTCOME MEASURES: The main outcomes measures were attributes that participants value in future research investments, and priority research investments for future research. RESULTS: Two hundred and nineteen participants completed the exercises, of whom 11% were adults with autism, 58% were parents/family members, 37% were service providers and 21% were researchers. Among stakeholders, the BWS exercises were easier to understand than the direct prioritization, less frequently skipped and yielded more consistent results. The proportion of children with autism affected by the research was the most important attribute for all types of stakeholders. The top three priorities among future research investments were (1) evidence on which child, family and intervention characteristics lead to the best/worst outcomes; (2) evidence on how changes in one area of a child's life are related to changes in other areas; and (3) evidence on dietary interventions. Priorities were similar for all stakeholder types. CONCLUSIONS: The values and priorities examined here provide a road map for investigators and funders to pursue autism research that matters to stakeholders. PATIENT OR PUBLIC CONTRIBUTION: Stakeholders completed a BWS and direct prioritization exercise to inform us about their priorities for future autism research.


Assuntos
Transtorno Autístico , Pesquisa Biomédica , Prioridades em Saúde , Adulto , Transtorno Autístico/terapia , Cuidadores , Criança , Estudos de Viabilidade , Humanos , Pais , Estudos Prospectivos
8.
J Gen Intern Med ; 36(5): 1319-1326, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33694071

RESUMO

BACKGROUND: The HERO registry was established to support research on the impact of the COVID-19 pandemic on US healthcare workers. OBJECTIVE: Describe the COVID-19 pandemic experiences of and effects on individuals participating in the HERO registry. DESIGN: Cross-sectional, self-administered registry enrollment survey conducted from April 10 to July 31, 2020. SETTING: Participants worked in hospitals (74.4%), outpatient clinics (7.4%), and other settings (18.2%) located throughout the nation. PARTICIPANTS: A total of 14,600 healthcare workers. MAIN MEASURES: COVID-19 exposure, viral and antibody testing, diagnosis of COVID-19, job burnout, and physical and emotional distress. KEY RESULTS: Mean age was 42.0 years, 76.4% were female, 78.9% were White, 33.2% were nurses, 18.4% were physicians, and 30.3% worked in settings at high risk for COVID-19 exposure (e.g., ICUs, EDs, COVID-19 units). Overall, 43.7% reported a COVID-19 exposure and 91.3% were exposed at work. Just 3.8% in both high- and low-risk settings experienced COVID-19 illness. In regression analyses controlling for demographics, professional role, and work setting, the risk of COVID-19 illness was higher for Black/African-Americans (aOR 2.32, 99% CI 1.45, 3.70, p < 0.01) and Hispanic/Latinos (aOR 2.19, 99% CI 1.55, 3.08, p < 0.01) compared with Whites. Overall, 41% responded that they were experiencing job burnout. Responding about the day before they completed the survey, 53% of participants reported feeling tired a lot of the day, 51% stress, 41% trouble sleeping, 38% worry, 21% sadness, 19% physical pain, and 15% anger. On average, healthcare workers reported experiencing 2.4 of these 7 distress feelings a lot of the day. CONCLUSIONS: Healthcare workers are at high risk for COVID-19 exposure, but rates of COVID-19 illness were low. The greater risk of COVID-19 infection among race/ethnicity minorities reported in the general population is also seen in healthcare workers. The HERO registry will continue to monitor changes in healthcare worker well-being during the pandemic. TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT04342806.


Assuntos
COVID-19 , Pandemias , Adulto , Estudos Transversais , Feminino , Pessoal de Saúde , Humanos , Masculino , Sistema de Registros , SARS-CoV-2
9.
BMC Health Serv Res ; 21(1): 1191, 2021 Nov 03.
Artigo em Inglês | MEDLINE | ID: mdl-34732177

RESUMO

BACKGROUND: Recent increases in state laws to reduce opioid prescribing have demonstrated a need to understand how they are interpreted and implemented in healthcare systems. The purpose of this study was to explore the systems, strategies, and resources that hospital administrators and prescribers used to implement the 2017 North Carolina Strengthen Opioid Prevention (STOP) Act opioid prescribing limits, which limited initial prescriptions to a five (for acute) or seven (for post-surgical) days' supply. METHODS: We interviewed 14 hospital administrators and 38 prescribers with degrees in medicine, nursing, pharmacy, business administration and public health working across North Carolina. Interview guides, informed by the Consolidated Framework for Implementation Research, explored barriers and facilitators to implementation. Interview topics included communication, resources, and hospital system support. Interviews were recorded and transcribed, then analyzed using flexible coding, integrating inductive and deductive coding, to inform analytic code development and identify themes. RESULTS: We identified three main themes around implementation of STOP act mandated prescribing limits: organizational communication, prescriber education, and changes in the electronic medical record (EMR) systems. Administrators reflected on implementation in the context of raising awareness and providing reminders to facilitate changes in prescriber behavior, operationalized through email and in-person communications as well as dedicated resources to EMR changes. Prescribers noted administrative communications about prescribing limits often focused on legality, suggesting a directive of the organization's policy rather than a passive reminder. Prescribers expressed a desire for more spaces to have their questions answered and resources for patient communications. While hospital administrators viewed compliance with the law as a priority, prescribers reflected on concerns for adequately managing their patients' pain and limited time for clinical care. CONCLUSIONS: Hospital administrators and prescribers approached implementation of the STOP act prescribing limits with different mindsets. While administrators were focused on policy compliance, prescribers were focused on their patients' needs. Strategies to implement the mandate then had to balance patient needs with policy compliance. As states continue to legislate to prevent opioid overdose deaths, understanding how laws are implemented by healthcare systems and prescribers will improve their effectiveness through tailoring and maximizing available resources.


Assuntos
Analgésicos Opioides , Padrões de Prática Médica , Humanos , North Carolina , Prescrições
10.
Ann Intern Med ; 172(4): 272-278, 2020 02 18.
Artigo em Inglês | MEDLINE | ID: mdl-31931530

RESUMO

Expert groups, including the U.S. Preventive Services Task Force (USPSTF), recommend a range of clinical preventive services for persons at average risk for disease. Use of these services often is substantially lower among racial and ethnic minority groups, rural residents, and persons of lower socioeconomic status. On 19 and 20 June 2019, the National Institutes of Health (NIH) convened the Pathways to Prevention Workshop: Achieving Health Equity in Preventive Services to assess the available evidence on disparities in the use of 10 USPSTF-recommended clinical preventive services for cancer, heart disease, and diabetes. The workshop was cosponsored by the NIH Office of Disease Prevention; National Institute on Minority Health and Health Disparities; National Cancer Institute; National Heart, Lung, and Blood Institute; and National Institute of Diabetes and Digestive and Kidney Diseases. A multidisciplinary working group developed the agenda, and an Evidence-based Practice Center prepared the evidence report. During the workshop, invited experts considered the evidence, with discussion among attendees. After weighing evidence from the review, presentations, and public comments, an independent panel prepared a draft report that was posted for public comment. This final report summarizes the panel's findings, identifying current gaps in knowledge. The panel made 26 recommendations for new research and methods development to improve implementation of proven services to reduce disparities in preventable conditions.


Assuntos
Equidade em Saúde , National Institutes of Health (U.S.) , Serviços Preventivos de Saúde/organização & administração , Adulto , Educação , Equidade em Saúde/organização & administração , Disparidades em Assistência à Saúde/organização & administração , Humanos , Estados Unidos
11.
Dis Colon Rectum ; 63(11): 1550-1558, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-33044296

RESUMO

BACKGROUND: Thirty-day readmissions, emergency department visits, and observation stays are common after colorectal surgery (9%-25%, 8%-12%, and 3%-5%), yet it is unknown to what extent planned postdischarge care can decrease the frequency of emergency department visits. OBJECTIVE: This study's aim was to determine whether early follow-up with the surgical team reduces 30-day emergency department visits. DESIGN: This retrospective cohort study used a central data repository of clinical and administrative data for 2013 through 2018. SETTING: This study was conducted in a large statewide health care system (10 affiliated hospitals, >300 practices). PATIENTS: All adult patients undergoing colorectal surgery were included unless they had a length of stay <1 day or died during the index hospitalization. INTERVENTION: Early (<10 days after discharge) versus late (≥10 days) follow-up at the outpatient surgery clinic, or no outpatient surgery clinic follow-up, was assessed. MAIN OUTCOME MEASURES: The primary outcome measured was the time to 30-day postdischarge emergency department visit. RESULTS: Our cohort included 3442 patients undergoing colorectal surgery; 38% of patients had an early clinic visit. Overall, 11% had an emergency department encounter between 11 and 30 days after discharge. Those with early follow-up had decreased emergency department encounters (adjusted HR 0.13; 95% CI, 0.08-0.22). An early clinic visit within 10 days, compared to 14 days, prevented an additional 142 emergency department encounters. Nationwide, this could potentially prevent 8433 unplanned visits each year with an estimated cost savings of $49 million annually. LIMITATIONS: We used retrospective data and were unable to assess for health care utilization outside our health system. CONCLUSIONS: Early follow-up within 10 days of adult colorectal surgery is associated with decreased subsequent emergency department encounters. See Video Abstract at http://links.lww.com/DCR/B330. EL SEGUIMIENTO TEMPRANO DESPUÉS DE LA CIRUGÍA COLORRECTAL REDUCE LAS VISITAS AL SERVICIO DE URGENCIAS POSTERIOR AL ALTA: Los readmisión a los treinta días, las visitas al servicio de urgencias y las estancias de observación son comunes después de la cirugía colorrectal, 9-25%, 8-12% y 3-5%, respectivamente. Sin embargo, se desconoce en qué medida la atención planificada posterior al alta puede disminuir la frecuencia de las visitas al servicio de urgencias.Determinar si el seguimiento temprano con el equipo quirúrgico reduce las visitas a 30 días al servicio de urgencias.Este estudio de cohorte retrospectivo utilizó un depósito central de datos clínicos y administrativos para 2013-2018.Gran sistema de salud estatal (10 hospitales afiliados,> 300 consultorios).Se incluyeron todos los pacientes adultos de cirugía colorrectal a menos que tuvieran una estadía <1 día o murieran durante el índice de hospitalización.Temprano (<10 días después del alta) versus tardío (≥10 días) o sin seguimiento en la clínica de cirugía ambulatoria.Tiempo para la visita al servicio de urgencias a 30 días después del alta.Nuestra cohorte incluyó 3.442 pacientes de cirugía colorrectal; El 38% de los pacientes tuvieron una visita temprana a clínica. En total, el 11% tuvo un encuentro con el servicio de urgencias entre 11 y 30 días después de ser dado de alta. Aquellos con seguimiento temprano disminuyeron las visitas al servicio de urgencias (HR 0,13; IC del 95%: 0,08 a 0,22). Además, una visita temprana a la clínica en un plazo de 10 días, en comparación con 14 días, evitó 142 encuentros adicionales en el servicio de urgencias. A nivel nacional, esto podría prevenir 8.433 visitas no planificadas cada año con un ahorro estimado de $ 49 millones anuales.Utilizamos datos retrospectivos y no pudimos evaluar la utilización de la atención médica fuera de nuestro sistema de salud.El seguimiento temprano dentro de los 10 días de la cirugía colorrectal en adultos se asocia con una disminución de los encuentros posteriores en el servicio de urgencias. Consulte Video Resumen en http://links.lww.com/DCR/B330. (Traducción-Dr. Gonzalo Hagerman).


Assuntos
Assistência ao Convalescente , Cirurgia Colorretal/efeitos adversos , Intervenção Médica Precoce , Uso Excessivo dos Serviços de Saúde/prevenção & controle , Alta do Paciente/normas , Complicações Pós-Operatórias , Assistência ao Convalescente/métodos , Assistência ao Convalescente/estatística & dados numéricos , Cirurgia Colorretal/métodos , Cirurgia Colorretal/estatística & dados numéricos , Intervenção Médica Precoce/métodos , Intervenção Médica Precoce/organização & administração , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Avaliação de Processos e Resultados em Cuidados de Saúde , Readmissão do Paciente/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/terapia , Melhoria de Qualidade , Estados Unidos/epidemiologia
12.
Development ; 142(9): 1606-15, 2015 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-25858457

RESUMO

Cell fate decisions are fundamental to the development of multicellular organisms. In mammals the first cell fate decision involves segregation of the pluripotent inner cell mass and the trophectoderm, a process regulated by cell polarity proteins, HIPPO signaling and lineage-specific transcription factors such as CDX2. However, the regulatory mechanisms that operate upstream to specify the trophectoderm lineage have not been established. Here we report that transcription factor AP-2γ (TFAP2C) functions as a novel upstream regulator of Cdx2 expression and position-dependent HIPPO signaling in mice. Loss- and gain-of-function studies and promoter analysis revealed that TFAP2C binding to an intronic enhancer is required for activation of Cdx2 expression during early development. During the 8-cell to morula transition TFAP2C potentiates cell polarity to suppress HIPPO signaling in the outside blastomeres. TFAP2C depletion triggered downregulation of PARD6B, loss of apical cell polarity, disorganization of F-actin, and activation of HIPPO signaling in the outside blastomeres. Rescue experiments using Pard6b mRNA restored cell polarity but only partially corrected position-dependent HIPPO signaling, suggesting that TFAP2C negatively regulates HIPPO signaling via multiple pathways. Several genes involved in regulation of the actin cytoskeleton (including Rock1, Rock2) were downregulated in TFAP2C-depleted embryos. Inhibition of ROCK1 and ROCK2 activity during the 8-cell to morula transition phenocopied TFAP2C knockdown, triggering a loss of position-dependent HIPPO signaling and decrease in Cdx2 expression. Altogether, these results demonstrate that TFAP2C facilitates trophectoderm lineage specification by functioning as a key regulator of Cdx2 transcription, cell polarity and position-dependent HIPPO signaling.


Assuntos
Diferenciação Celular/fisiologia , Linhagem da Célula/fisiologia , Regulação da Expressão Gênica no Desenvolvimento/fisiologia , Proteínas de Homeodomínio/metabolismo , Transdução de Sinais/fisiologia , Fator de Transcrição AP-2/metabolismo , Fatores de Transcrição/metabolismo , Trofoblastos/fisiologia , Amidas/farmacologia , Análise de Variância , Animais , Fator de Transcrição CDX2 , Polaridade Celular/fisiologia , Imunoprecipitação da Cromatina , Regulação da Expressão Gênica no Desenvolvimento/genética , Via de Sinalização Hippo , Luciferases , Camundongos , Microscopia de Fluorescência , Proteínas Serina-Treonina Quinases/metabolismo , Piridinas/farmacologia , RNA Interferente Pequeno/genética , Reação em Cadeia da Polimerase em Tempo Real , Transdução de Sinais/genética , Quinases Associadas a rho/antagonistas & inibidores , Quinases Associadas a rho/metabolismo
13.
J Biol Chem ; 290(23): 14462-75, 2015 Jun 05.
Artigo em Inglês | MEDLINE | ID: mdl-25903125

RESUMO

The retinoblastoma (RB) tumor suppressor and related family of proteins play critical roles in development through their regulation of genes involved in cell fate. Multiple regulatory pathways impact RB function, including the ubiquitin-proteasome system with deregulated RB destruction frequently associated with pathogenesis. With the current study we explored the mechanisms connecting proteasome-mediated turnover of the RB family to the regulation of repressor activity. We find that steady state levels of all RB family members, RB, p107, and p130, were diminished during embryonic stem cell differentiation concomitant with their target gene acquisition. Proteasome-dependent turnover of the RB family is mediated by distinct and autonomously acting instability elements (IE) located in their C-terminal regulatory domains in a process that is sensitive to cyclin-dependent kinase (CDK4) perturbation. The IE regions include motifs that contribute to E2F-DP transcription factor interaction, and consistently, p107 and p130 repressor potency was reduced by IE deletion. The juxtaposition of degron sequences and E2F interaction motifs appears to be a conserved feature across the RB family, suggesting the potential for repressor ubiquitination and specific target gene regulation. These findings establish a mechanistic link between regulation of RB family repressor potency and the ubiquitin-proteasome system.


Assuntos
Proteína do Retinoblastoma/análise , Proteína do Retinoblastoma/metabolismo , Sequência de Aminoácidos , Animais , Linhagem Celular , Sequência Conservada , Células-Tronco Embrionárias/citologia , Células-Tronco Embrionárias/metabolismo , Evolução Molecular , Humanos , Camundongos , Modelos Moleculares , Dados de Sequência Molecular , Complexo de Endopeptidases do Proteassoma/metabolismo , Estabilidade Proteica , Estrutura Terciária de Proteína , Alinhamento de Sequência , Transcrição Gênica
14.
Development ; 139(24): 4623-32, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23136388

RESUMO

The trophectoderm epithelium is the first differentiated cell layer to arise during mammalian development. Blastocyst formation requires the proper expression and localization of tight junction, polarity, ion gradient and H2O channel proteins in the outer cell membranes. However, the underlying transcriptional mechanisms that control their expression are largely unknown. Here, we report that transcription factor AP-2γ (Tcfap2c) is a core regulator of blastocyst formation in mice. Bioinformatics, chromatin immunoprecipitation and transcriptional analysis revealed that Tcfap2c binds and regulates a diverse group of genes expressed during blastocyst formation. RNA interference experiments demonstrated that Tcfap2c regulates genes important for tight junctions, cell polarity and fluid accumulation. Functional and ultrastructural studies revealed that Tcfap2c is necessary for tight junction assembly and paracellular sealing in trophectoderm epithelium. Aggregation of control eight-cell embryos with Tcfap2c knockdown embryos rescued blastocyst formation via direct contribution to the trophectoderm epithelium. Finally, we found that Tcfap2c promotes cellular proliferation via direct repression of p21 transcription during the morula-to-blastocyst transition. We propose a model in which Tcfap2c acts in a hierarchy to facilitate blastocyst formation through transcriptional regulation of core genes involved in tight junction assembly, fluid accumulation and cellular proliferation.


Assuntos
Desenvolvimento Embrionário/fisiologia , Regulação da Expressão Gênica no Desenvolvimento , Junções Íntimas/metabolismo , Fator de Transcrição AP-2/metabolismo , Animais , Blastocisto/metabolismo , Técnicas de Cultura de Células , Diferenciação Celular , Polaridade Celular , Proliferação de Células , Imunoprecipitação da Cromatina , Biologia Computacional , Células-Tronco Embrionárias/citologia , Feminino , Íons , Masculino , Camundongos , Microscopia Eletrônica de Transmissão , Interferência de RNA , Fator de Transcrição AP-2/genética , Transcrição Gênica
15.
Am J Kidney Dis ; 66(6): 1033-46, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26210069

RESUMO

BACKGROUND: Patients with end-stage renal disease (ESRD) receiving dialysis have poor health-related quality of life. Physical symptoms are highly prevalent among dialysis-dependent patients and play important roles in health-related quality of life. A range of symptom assessment tools have been used in dialysis-dependent patients, but there has been no previous systematic assessment of the existing symptom measures' content, validity, and reliability. STUDY DESIGN: Systematic review of the literature. SETTINGS & POPULATION: Patients with ESRD on maintenance dialysis therapy. SELECTION CRITERIA FOR STUDIES: Instruments with 3 or more physical symptoms previously used in dialysis-dependent patients and evidence of validity or reliability testing. INTERVENTION: Patient-reported physical symptom assessment instrument. OUTCOMES: Instrument symptom-related content, validity, and reliability. RESULTS: From 3,148 screened abstracts, 89 full-text articles were eligible for review. After article exclusion and further article identification by reference reviews, 58 articles on 23 symptom assessment instruments with documented reliability or validity testing were identified. Of the assessment instruments, 43.5% were generic and 56.5% were ESRD specific. Symptoms most frequently assessed were fatigue, shortness of breath, insomnia, nausea and vomiting, and appetite. Instruments varied widely in respondent time burden, recall period, and symptom attributes. Few instruments considered recall periods less than 2 weeks and few assessed a range of symptom attributes. Psychometric testing was completed for congruent validity (70%), known-group validity (25%), responsiveness (30%), internal consistency (78%), and test-retest reliability (65%). Content validity was assessed in dialysis populations in 57% of the 23 instruments. LIMITATIONS: Consideration of physical symptoms only and exclusion of single symptom-focused instruments. CONCLUSIONS: The number of available instruments focused exclusively on physical symptoms in dialysis patients is limited. Few symptom-containing instruments have short recall periods, assess diverse symptom attributes, and have undergone comprehensive psychometric testing. Improved symptom-focused assessment tools are needed to improve symptom evaluation and symptom responsiveness to intervention among dialysis-dependent patients.


Assuntos
Falência Renal Crônica/psicologia , Falência Renal Crônica/terapia , Avaliação de Resultados da Assistência ao Paciente , Qualidade de Vida/psicologia , Diálise Renal/psicologia , Autorrelato , Humanos , Falência Renal Crônica/diagnóstico , Diálise Renal/efeitos adversos
17.
Pediatr Diabetes ; 15(8): 573-84, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24913103

RESUMO

BACKGROUND: The performance of automated algorithms for childhood diabetes case ascertainment and type classification may differ by demographic characteristics. OBJECTIVE: This study evaluated the potential of administrative and electronic health record (EHR) data from a large academic care delivery system to conduct diabetes case ascertainment in youth according to type, age, and race/ethnicity. SUBJECTS: Of 57 767 children aged <20 yr as of 31 December 2011 seen at University of North Carolina Health Care System in 2011 were included. METHODS: Using an initial algorithm including billing data, patient problem lists, laboratory test results, and diabetes related medications between 1 July 2008 and 31 December 2011, presumptive cases were identified and validated by chart review. More refined algorithms were evaluated by type (type 1 vs. type 2), age (<10 vs. ≥10 yr) and race/ethnicity (non-Hispanic White vs. 'other'). Sensitivity, specificity, and positive predictive value were calculated and compared. RESULTS: The best algorithm for ascertainment of overall diabetes cases was billing data. The best type 1 algorithm was the ratio of the number of type 1 billing codes to the sum of type 1 and type 2 billing codes ≥0.5. A useful algorithm to ascertain youth with type 2 diabetes with 'other' race/ethnicity was identified. Considerable age and racial/ethnic differences were present in type-non-specific and type 2 algorithms. CONCLUSIONS: Administrative and EHR data may be used to identify cases of childhood diabetes (any type), and to identify type 1 cases. The performance of type 2 case ascertainment algorithms differed substantially by race/ethnicity.


Assuntos
Algoritmos , Diabetes Mellitus Tipo 1/classificação , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 2/classificação , Diabetes Mellitus Tipo 2/diagnóstico , Registros Eletrônicos de Saúde , Adolescente , Adulto , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/epidemiologia , Diabetes Mellitus Tipo 2/epidemiologia , Registros Eletrônicos de Saúde/normas , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Programas de Rastreamento/métodos , Adulto Jovem
20.
Curr Rheumatol Rep ; 15(2): 305, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23307577

RESUMO

Lumbar spine osteoarthritis (OA) is very common, with estimates of prevalence ranging from 40-85 %. The process of degeneration of the spine has commonly been classified as OA (disc space narrowing together with vertebral osteophyte formation); however, anatomically, the facet joint is the only synovial joint in the spine that has a similar pathological degenerative process to appendicular joints. Low back pain (LBP) is also a common condition, with nearly 80 % of Americans experiencing at least one episode of LBP in their lifetime. The complex relationship between spine radiographs and LBP has many clinical and research challenges. Specific conservative treatments for spine degeneration have not been established; there has, however, been recent interest in use of exercise therapy, because of some moderate benefits in treating chronic LBP. An understanding of the relationship between spine degeneration and LBP may be improved with further population-based research in the areas of genetics, biomarkers, and pain pathways.


Assuntos
Dor Lombar/fisiopatologia , Vértebras Lombares/fisiopatologia , Osteoartrite da Coluna Vertebral/fisiopatologia , Previsões , Humanos , Dor Lombar/epidemiologia , Dor Lombar/terapia , Vértebras Lombares/anatomia & histologia , Osteoartrite da Coluna Vertebral/epidemiologia , Prevalência , Fatores de Risco
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