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1.
Lancet ; 403(10445): 2747-2750, 2024 Jun 22.
Artigo em Inglês | MEDLINE | ID: mdl-38795713

RESUMO

The Dobbs v Jackson Women's Health Organization Supreme Court decision, which revoked the constitutional right to abortion in the USA, has impacted the national medical workforce. Impacts vary across states, but providers in states with restrictive abortion laws now must contend with evolving legal and ethical challenges that have the potential to affect workforce safety, mental health, education, and training opportunities, in addition to having serious impacts on patient health and far-reaching societal consequences. Moreover, Dobbs has consequences on almost every facet of the medical workforce, including on physicians, nurses, pharmacists, and others who work within the health-care system. Comprehensive research is urgently needed to understand the wide-ranging implications of Dobbs on the medical workforce, including legal, ethical, clinical, and psychological dimensions, to inform evidence-based policies and standards of care in abortion-restrictive settings. Lessons from the USA might also have global relevance for countries facing similar restrictions on reproductive care.


Assuntos
Decisões da Suprema Corte , Feminino , Humanos , Gravidez , Aborto Induzido/legislação & jurisprudência , Aborto Induzido/ética , Aborto Legal/legislação & jurisprudência , Pessoal de Saúde , Mão de Obra em Saúde , Estados Unidos , Saúde da Mulher
2.
Lancet ; 403(10445): 2751-2754, 2024 Jun 22.
Artigo em Inglês | MEDLINE | ID: mdl-38795714

RESUMO

On June 24, 2022, the US Supreme Court's decision in Dobbs v Jackson Women's Health Organization marked the removal of the constitutional right to abortion in the USA, introducing a complex ethical and legal landscape for patients and providers. This shift has had immediate health and equity repercussions, but it is also crucial to examine the broader impacts on states, health-care systems, and society as a whole. Restrictions on abortion access extend beyond immediate reproductive care concerns, necessitating a comprehensive understanding of the ruling's consequences across micro and macro levels. To mitigate potential harm, it is imperative to establish a research agenda that informs policy making and ensures effective long-term monitoring and reporting, addressing both immediate and future impacts.


Assuntos
Decisões da Suprema Corte , Saúde da Mulher , Humanos , Feminino , Estados Unidos , Gravidez , Saúde da Mulher/legislação & jurisprudência , Acessibilidade aos Serviços de Saúde/legislação & jurisprudência , Direitos da Mulher/legislação & jurisprudência , Aborto Legal/legislação & jurisprudência , Aborto Induzido/legislação & jurisprudência , Aborto Induzido/ética
3.
Clin Rehabil ; 37(4): 557-568, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36310441

RESUMO

OBJECTIVE: To examine the trajectory of the Rating of Everyday Arm-use in the Community and Home (REACH) scores over the first-year post-stroke, determine if REACH scores are modified by baseline impairment level and explore the responsiveness of the REACH scale through hypothesis testing. DESIGN: Consecutive sample longitudinal study. SETTING: Participants were recruited from an acute stroke unit and followed up at three, six, and 12 months post-stroke. PARTICIPANTS: Seventy-three participants with upper limb weakness (Shoulder Abduction and Finger Extension score ≤ 8). MAIN MEASURES: The REACH scale is a six-level self-report classification scale that captures how the affected upper limb is being used in one's own environment. The Fugl-Meyer Upper Limb Assessment (FMA-UL), Stroke Upper Limb Capacity Scale (SULCS), accelerometer-based activity count ratio and Global Rating of Change Scale (GRCS) were used to capture upper limb impairment, capacity, and use. RESULTS: The following proportions of participants improved at least one REACH level: 64% from baseline to three months, 37% from three to six months and 13% from six to 12 months post-stroke. The trajectory of REACH scores over time was associated with baseline impairment. Change in REACH had a moderate correlation to change in SULCS and the GRCS but not FMA-UL or the activity count ratio. CONCLUSIONS: Results of hypothesis testing provide preliminary evidence of the responsiveness of the REACH scale. On average, individuals with severe impairment continued to show improvement in use over the first year, while those with mild/moderate impairment plateaued and a small proportion decreased in the early chronic phase.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral , Humanos , Braço , Estudos Longitudinais , Recuperação de Função Fisiológica , Acidente Vascular Cerebral/complicações , Extremidade Superior
4.
Artigo em Inglês | MEDLINE | ID: mdl-37624473

RESUMO

BACKGROUND: The 1997 legislation authorizing the United States Child Health Insurance Program sparked progress to measure and publicly report on children's healthcare services quality and system performance. To meet the moment, the national Child and Adolescent Health Measurement Initiative (CAHMI) public-private collaboration was launched to put families at the center of defining, measuring and using healthcare performance information to drive improved services quality and outcomes. METHODS: Since 1996 the CAHMI followed an intentional path of collaborative action to (1) articulate shared goals for child health and advance a comprehensive, life-course and outcomes-based healthcare performance measurement and reporting framework; (2) collaborate with families, providers, payers and government agencies to specify, validate and support national, state and local use of dozens of framework aligned measures; (3) create novel public-facing digital data query, collection and reporting tools that liberate data findings for use by families, providers, advocates, policymakers, the media and researchers (Data Resource Center, Well Visit Planner); and (4) generate field building research and systems change agendas and frameworks (Prioritizing Possibilities, Engagement In Action) to catalyze prevention, flourishing and healing centered, trauma-informed, whole child and family engaged approaches, integrated systems and supportive financing and policies. CONCLUSIONS: Lessons call for a restored, sustainable family and community engaged measurement infrastructure, public activation campaigns, and undeterred federal, state and systems leadership that implement policies to incentivize, resource, measure and remove barriers to integrated systems of care that scale family engagement to equitably promote whole child, youth and family well-being. Population health requires effective family engagement.

5.
Am J Occup Ther ; 77(1)2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36706274

RESUMO

IMPORTANCE: A simple measure that can be administered remotely by means of videoconferencing is needed for telerehabilitation. OBJECTIVE: To develop a valid and reliable measure, the Arm Capacity and Movement Test (ArmCAM), that can be administered remotely by means of videoconferencing to evaluate upper extremity motor function poststroke. DESIGN: Cross-sectional. SETTING: Participants' homes. PARTICIPANTS: A sample of people with stroke (N = 31). OUTCOMES AND MEASURES: Test-retest and interrater reliabilities were assessed through intraclass correlation coefficients (ICCs), Cohen's κ, standard error of measurement (SEM), and minimal detectable change (MDC). Interrater reliability validity was examined with Pearson and Spearman rank correlation coefficients. RESULTS: The ArmCAM (range = 0-30) consists of 10 items and takes 15 min to administer with no special equipment except for a computer and internet access. The ICCs for test-retest reliability and interrater reliability were .997 and .993, respectively. The SEM and MDC95 were 0.74 and 2.05 points, respectively. Individual items' test-retest reliability and interrater levels of agreement ranged from .811 to .957 and from .475 to .842, respectively, as measured with Cohen's κ. Correlations between the ArmCAM and the Rating of Everyday Arm-use in the Community and Home scale; the Stroke Impact Scale, hand function domain; the Fugl-Meyer Assessment for upper extremity; and the Action Research Arm Test were good to excellent. CONCLUSIONS AND RELEVANCE: The ArmCAM has good reliability and validity. It is an easy-to-use assessment designed to be administered remotely by means of videoconferencing. What This Article Adds: The ArmCAM is a psychometrically sound instrument that can be easily administered remotely by means of videoconferencing to evaluate upper extremity motor function after stroke.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral , Humanos , Projetos Piloto , Reprodutibilidade dos Testes , Estudos Transversais , Extremidade Superior , Avaliação da Deficiência
6.
J Neuroeng Rehabil ; 18(1): 135, 2021 09 08.
Artigo em Inglês | MEDLINE | ID: mdl-34496894

RESUMO

BACKGROUND: There is growing interest in the use of wearable devices that track upper limb activity after stroke to help determine and motivate the optimal dose of upper limb practice. The purpose of this study was to explore clinicians' perceptions of a prospective wearable device that captures upper limb activity to assist in the design of devices for use in rehabilitation practice. METHODS: Four focus groups with 18 clinicians (occupational and physical therapists with stroke practice experience from a hospital or private practice setting) were conducted. Data were analyzed thematically. RESULTS: Our analysis revealed three themes: (1) "Quantity and quality is ideal" emphasized how an ideal device would capture both quantity and quality of movement; (2) "Most useful outside therapy sessions" described how therapists foresaw using the device outside of therapy sessions to monitor homework adherence, provide self-monitoring of use, motivate greater use and provide biofeedback on movement quality; (3) "User-friendly please" advocated for the creation of a device that was easy to use and customizable, which reflected the client-centered nature of their treatment. CONCLUSIONS: Findings from this study suggest that clinicians support the development of wearable devices that capture upper limb activity outside of therapy for individuals with some reach to grasp ability. Devices that are easy to use and capture both quality and quantity may result in greater uptake in the clinical setting. Future studies examining acceptability of wearable devices for tracking upper limb activity from the perspective of individuals with stroke are needed.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Dispositivos Eletrônicos Vestíveis , Grupos Focais , Humanos , Percepção , Estudos Prospectivos , Extremidade Superior
7.
Stroke ; 50(12): 3643-3646, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31662119

RESUMO

Background and Purpose- A reliable measure of movement repetitions is required to assist in determining the optimal dose for maximizing upper limb recovery after stroke. This study investigated the ability of a new wearable device to capture reach-to-grasp repetitions in individuals with stroke. Methods- Eight individuals with stroke wore an instrumented wrist bracelet while completing 12 upper limb activities. Participants completed 5 and 10 repetitions of each activity on 2 separate sessions (time 1 and time 2) and completed clinical assessments (Fugl-Meyer Upper Extremity Assessment and Action Research Arm Test). Mean reach-to-grasp counts (ie, hand counts) were compared across activities. Scaling properties were assessed by the ratio of 10 repetitions to 5 repetitions for the activities (ie, expected value of 2). Bland-Altman diagrams were used to examine agreement between time 1 and time 2 counts. Results- The wrist bracelet averaged 0 to 0.6 hand counts per repetition for the arm-only and hand-only activities and averaged 1 to 2 counts per repetition of the reach-to-grasp activities. The mean ratio of 10 repetition to 5 repetition counts was ≈2 for all of the reach-to-grasp activities. Mean differences from time 1 to time 2 were <0.3 counts/repetition for all activities except one. Conclusions- These preliminary results provide evidence that the wrist bracelet is able to capture hand counts over a variety of tasks in a consistent manner. This wrist bracelet could be further developed as a tool to record dose of upper limb practice for research or clinical practice, as well as providing motivation and accountability to patients participating in treatments requiring upper limb movement repetitions. Currently, there are limitations in interpreting the impact of impairment and common compensatory movements on hand counts, and it would be valuable for future studies to explore these effects.


Assuntos
Força da Mão , Mãos , Atividade Motora/fisiologia , Paresia/fisiopatologia , Acidente Vascular Cerebral/fisiopatologia , Dispositivos Eletrônicos Vestíveis , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Miografia/instrumentação , Paresia/reabilitação , Reabilitação do Acidente Vascular Cerebral , Análise e Desempenho de Tarefas
8.
BMC Health Serv Res ; 19(1): 192, 2019 Mar 27.
Artigo em Inglês | MEDLINE | ID: mdl-30917828

RESUMO

BACKGROUND: More people are surviving stroke but are living with functional limitations that pose increasing demands on their families and the healthcare system. The aim of this study was to determine the extent to which stroke survivors use healthcare services on a population level compared to people without a stroke. METHODS: This was a cross-sectional population-based survey that collected information related to health status, healthcare utilization and health determinants using the 2014 Canadian Community Health Survey. Healthcare utilization was assessed by a computer-assisted personal interview asking about visits to healthcare professionals in the last 12 months. Negative binomial regression was used to estimate the incidence rate ratios (IRR) and 95% confidence intervals (CI) for the number of health professional visits between stroke survivors and people without a stroke. The regression models were adjusted for demographics, as well as for mobility, mood/anxiety disorder and cardiometabolic comorbid conditions. RESULTS: The study sample included 35,759 respondents (948 stroke, 34,811 non-stroke) and equate to 12,396,641 (286,783 stroke; 12,109,858 non-stroke) when sampling weights were applied. Stroke survivors visited their family doctor the most, and stroke was significantly associated with more visits to most healthcare professionals [e.g., family doctor IRR 1.6 (CI 1.4-1.8); nurse IRR 3.0 (CI 1.8-4.8); physiotherapist IRR 1.8 (CI 1.1-1.9); psychologist IRR 4.0 (CI 1.1-5.7)] except the dental practitioner, which was less [IRR 0.7 (CI 0.6-0.9)]. Mood/anxiety condition, but not cardiometabolic comorbid condition increased the probability of visiting a family doctor or social worker/ counsellor among people with stroke. CONCLUSION: Stroke survivors visited healthcare professionals more often than people without stroke, and were approximately twice as likely to visit with those who manage problems that may arise after a stroke (e.g., family doctor, nurse, psychologist, physiotherapist). The effects of a stroke include mobility impairment and mood/ anxiety disorders. Therefore, adequate access to stroke-related healthcare services should be provided for stroke survivors, as this may improve functional outcome and reduce future healthcare costs.


Assuntos
Serviços de Saúde/estatística & dados numéricos , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Acidente Vascular Cerebral/terapia , Idoso , Transtornos de Ansiedade/etiologia , Canadá , Estudos de Casos e Controles , Estudos Transversais , Atenção à Saúde , Feminino , Custos de Cuidados de Saúde/estatística & dados numéricos , Nível de Saúde , Inquéritos Epidemiológicos , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Regressão , Acidente Vascular Cerebral/psicologia , Sobreviventes
9.
Int J Qual Health Care ; 30(suppl_1): 24-28, 2018 Apr 20.
Artigo em Inglês | MEDLINE | ID: mdl-29447351

RESUMO

The gap between implementers and researchers of quality improvement (QI) has hampered the degree and speed of change needed to reduce avoidable suffering and harm in health care. Underlying causes of this gap include differences in goals and incentives, preferred methodologies, level and types of evidence prioritized and targeted audiences. The Salzburg Global Seminar on 'Better Health Care: How do we learn about improvement?' brought together researchers, policy makers, funders, implementers, evaluators from low-, middle- and high-income countries to explore how to increase the impact of QI. In this paper, we describe some of the reasons for this gap and offer suggestions to better bridge the chasm between researchers and implementers. Effectively bridging this gap can increase the generalizability of QI interventions, accelerate the spread of effective approaches while also strengthening the local work of implementers. Increasing the effectiveness of research and work in the field will support the knowledge translation needed to achieve quality Universal Health Coverage and the Sustainable Development Goals.


Assuntos
Pesquisa sobre Serviços de Saúde , Melhoria de Qualidade/organização & administração , Pesquisa Translacional Biomédica , Conservação dos Recursos Naturais , Atenção à Saúde/organização & administração , Atenção à Saúde/normas , Humanos , Motivação , Objetivos Organizacionais , Desenvolvimento de Programas , Pesquisa Translacional Biomédica/métodos , Pesquisa Translacional Biomédica/organização & administração
11.
Arterioscler Thromb Vasc Biol ; 38(9): 1959-1960, 2018 09.
Artigo em Inglês | MEDLINE | ID: mdl-30354263
12.
Arch Phys Med Rehabil ; 95(12): 2410-9, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24946084

RESUMO

OBJECTIVES: To use 3 measures of intensity­time, observed repetitions, and wrist accelerometer activity counts­to describe the intensity of exercise carried out when completing a structured upper limb exercise program, and to explore whether a relationship exists between wrist accelerometer activity counts and observed repetitions. DESIGN: Observational study design. SETTING: Rehabilitation center research laboratory. PARTICIPANTS: Community-dwelling stroke survivors (N=13) with upper limb hemiparesis. INTERVENTION: Not applicable. MAIN OUTCOME MEASURES: Time engaged in exercise, total repetitions, and accelerometer activity counts for the affected upper limb. RESULTS: Mean session time ± SD was 48.5±7.8 minutes. Participants were observed to be engaged in exercises for 63.8%±7.5% of the total session time. The median number of observed repetitions per session was 340 (interquartile range [IQR], 199-407), of which 251 (IQR, 80-309) were purposeful repetitions. Wrist accelerometers showed the stroke survivors' upper limbs to be moving for 75.7%±15.9% of the total session time. Purposeful repetitions and activity counts were found to be significantly correlated (ρ=.627, P<.05). CONCLUSIONS: Stroke survivors were not actively engaged in exercises for approximately one third of each exercise session. Overall session time may not be the most accurate measure of intensity. Counting repetitions was feasible when using a structured exercise program and provides a clinically meaningful way of monitoring intensity and progression. Wrist accelerometers provided an objective measure for how much the arm moves, which correlated with purposeful repetitions. Further research using repetitions and accelerometers as measures of intensity is warranted.


Assuntos
Terapia por Exercício , Exercício Físico/fisiologia , Paresia/reabilitação , Reabilitação do Acidente Vascular Cerebral , Acelerometria , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Paresia/etiologia , Acidente Vascular Cerebral/complicações , Fatores de Tempo , Extremidade Superior/fisiopatologia
14.
Physiother Res Int ; 28(4): e2010, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37104710

RESUMO

BACKGROUND AND OBJECTIVES: While arm function has been traditionally used as a primary goal for upper extremity rehabilitation post-stroke, we propose a simple measure of arm use, which may translate into better activities and participation. The aim was to determine the relationship between arm use and measures of activity and participation. METHODS: This was a cross-sectional study with evaluative components involving community-dwelling individuals with chronic stroke. The Rating of Everyday Arm-Use in the Community and Home (REACH) Scale was used to assess affected arm use, Barthel Index and activity domain of the Stroke Impact Scale (SIS) for activities, and participation domain of the SIS for participation. The participants were also asked if they resumed driving after the stroke. RESULTS: Forty-nine individuals (mean age = 70.3 ± 11.5 years, male sex = 51%) living with the effects of a stroke for at least 3 months participated in this study. There was a positive relationship between affected arm use and activities (Barthel Index score - rs  = 0.464; SIS activities - rs  = 0.686), participation (rs  = 0.479), and driving (rs  = 0.581). The Barthel Index scores were higher for individuals with dominant arm hemiparesis (p = 0.003) or left hemisphere lesions (p = 0.005). There was also greater arm use in left hemisphere lesions (p = 0.018). CONCLUSIONS: Affected arm use in individuals with chronic stroke is related to activities and participation. Given the importance of arm use in activities and participation after stroke, rehabilitation therapists may consider utilizing the REACH Scale, a simple and quick outcome measure, as a means to assess arm use and implement effective interventions for improving arm use.


Assuntos
Reabilitação do Acidente Vascular Cerebral , Acidente Vascular Cerebral , Idoso , Idoso de 80 Anos ou mais , Humanos , Masculino , Pessoa de Meia-Idade , Atividades Cotidianas , Braço , Estudos Transversais , Recuperação de Função Fisiológica , Acidente Vascular Cerebral/diagnóstico , Feminino
15.
Adv Ther ; 40(7): 2944-2964, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-37233876

RESUMO

INTRODUCTION: Randomized controlled trials (RCTs) of biologics in patients with severe, uncontrolled asthma have shown differential results by baseline blood eosinophil count (BEC). In the absence of head-to-head trials, we describe the effects of biologics on annualized asthma exacerbation rate (AAER) by baseline BEC in placebo-controlled RCTs. Exacerbations associated with hospitalization or an emergency room visit, pre-bronchodilator forced expiratory volume in 1 s, Asthma Control Questionnaire score, and Asthma Quality of Life Questionnaire score were also summarized. METHODS: MEDLINE (via PubMed) was searched for RCTs of biologics in patients with severe, uncontrolled asthma and with AAER reduction as a primary or secondary endpoint. AAER ratios and change from baseline in other outcomes versus placebo were compared across baseline BEC subgroups. Analysis was limited to US Food and Drug Administration-approved biologics. RESULTS: In patients with baseline BEC ≥ 300 cells/µL, AAER reduction was demonstrated with all biologics, and other outcomes were generally improved. In patients with BEC 0 to < 300 cells/µL, consistent AAER reduction was demonstrated only with tezepelumab; improvements in other outcomes were inconsistent across biologics. In patients with BEC 150 to < 300 cells/µL, consistent AAER reduction was demonstrated with tezepelumab and dupilumab (300 mg dose only), and in those with BEC 0 to < 150 cells/µL, AAER reduction was demonstrated only with tezepelumab. CONCLUSION: The efficacy of all biologics in reducing AAER in patients with severe asthma increases with higher baseline BEC, with varying profiles across individual biologics likely due to differing mechanisms of action.


Assuntos
Antiasmáticos , Asma , Produtos Biológicos , Eosinofilia , Humanos , Eosinófilos , Antiasmáticos/uso terapêutico , Produtos Biológicos/uso terapêutico , Asma/tratamento farmacológico , Contagem de Leucócitos , Eosinofilia/tratamento farmacológico , Método Duplo-Cego
16.
J Asthma Allergy ; 16: 755-774, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37496824

RESUMO

Background: Airway hyperresponsiveness (AHR) is a key feature of asthma. Biologic therapies used to treat asthma target specific components of the inflammatory pathway, and their effects on AHR can provide valuable information about the underlying disease pathophysiology. This review summarizes the available evidence regarding the effects of biologics on allergen-specific and non-allergen-specific airway responses in patients with asthma. Methods: We conducted a systematic review in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, including risk-of-bias assessment. PubMed and Ovid were searched for studies published between January 1997 and December 2021. Eligible studies were randomized, placebo-controlled trials that assessed the effects of biologics on AHR, early allergic response (EAR) and/or late allergic response (LAR) in patients with asthma. Results: Thirty studies were identified for inclusion. Bronchoprovocation testing was allergen-specific in 18 studies and non-allergen-specific in 12 studies. Omalizumab reduced AHR to methacholine, acetylcholine or adenosine monophosphate (3/9 studies), and reduced EAR (4/5 studies) and LAR (2/3 studies). Mepolizumab had no effect on AHR (3/3 studies), EAR or LAR (1/1 study). Tezepelumab reduced AHR to methacholine or mannitol (3/3 studies), and reduced EAR and LAR (1/1 study). Pitrakinra reduced LAR, with no effect on AHR (1/1 study). Etanercept reduced AHR to methacholine (1/2 studies). No effects were observed for lebrikizumab, tocilizumab, efalizumab, IMA-638 and anti-OX40 ligand on AHR, EAR or LAR; benralizumab on LAR; tralokinumab on AHR; and Ro-24-7472 on AHR or LAR (all 1/1 study each). No dupilumab or reslizumab studies were identified. Conclusion: Omalizumab and tezepelumab reduced EAR and LAR to allergens. Tezepelumab consistently reduced AHR to methacholine or mannitol. These findings provide insights into AHR mechanisms and the precise effects of asthma biologics. Furthermore, findings suggest that tezepelumab broadly targets allergen-specific and non-allergic forms of AHR, and the underlying cells and mediators involved in asthma.

17.
Biochem Soc Trans ; 40(2): 394-9, 2012 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-22435818

RESUMO

Our previously derived models of the active state of the ß2-adrenergic receptor are compared with recently published X-ray crystallographic structures of activated GPCRs (G-protein-coupled receptors). These molecular dynamics-based models using experimental data derived from biophysical experiments on activation were used to restrain the receptor to an active state that gave high enrichment for agonists in virtual screening. The ß2-adrenergic receptor active model and X-ray structures are in good agreement over both the transmembrane region and the orthosteric binding site, although in some regions the active model is more similar to the active rhodopsin X-ray structures. The general features of the microswitches were well reproduced, but with minor differences, partly because of the unexpected X-ray results for the rotamer toggle switch. In addition, most of the interacting residues between the receptor and the G-protein were identified. This analysis of the modelling has also given important additional insight into GPCR dimerization: re-analysis of results on photoaffinity analogues of rhodopsin provided additional evidence that TM4 (transmembrane helix 4) resides at the dimer interface and that ligands such as bivalent ligands may pass between the mobile helices. A comparison, and discussion, is also carried out between the use of implicit and explicit solvent for active-state modelling.


Assuntos
Modelos Biológicos , Multimerização Proteica , Receptores Acoplados a Proteínas G/metabolismo , Motivos de Aminoácidos , Animais , Sítios de Ligação , Humanos , Simulação de Dinâmica Molecular , Receptores Acoplados a Proteínas G/química
18.
Phys Ther ; 102(1)2022 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-34718796

RESUMO

OBJECTIVE: The purpose of this study was to provide contemporary estimates of the prevalence of lower extremity motor impairment and walking limitation after first-ever stroke and to characterize the predictive nature of early walking ability for being discharged home after acute hospitalization. METHODS: In this cohort study, data were collected from a metropolitan acute care hospital in Canada at admission for 487 adults with first-ever acute ischemic or hemorrhagic stroke. Lower extremity motor impairment and walking limitation were measured using the National Institutes of Health Stroke Scale and AlphaFIM, respectively. Parallel multivariable logistic regression models were built to predict discharge home after acute hospitalization compared with further hospitalization. RESULTS: For patients surviving a first-ever stroke, 44.1% presented with some degree of lower extremity motor impairment and 46.0% were unable to walk. In a multivariable model built around a binary classification of walking (Nagelkerke R2 = 0.41), those with any ability to walk at admission (with or without therapist assistance) had 9.48 times greater odds of being discharged home (odds ratio = 9.48, 95% CI = 6.11-14.92) than those who were unable. In a parallel multivariable model built around an ordinal classification of walking (Nagelkerke R2 = 0.49), patients had 2.07 times greater odds (odds ratio = 2.07, 95% CI = 1.82-2.38) of being discharged home for each increment on a 6-point walking scale (total dependence to complete independence) assessed at acute admission. CONCLUSION: Approximately one-half of patients with first-ever stroke present with lower extremity weakness and walking limitation. Early walking ability is a significant predictor of returning home after acute hospitalization, independent of stroke severity. Discharge planning may be facilitated early after stroke with the familiar assessment of walking ability. IMPACT: An early assessment of walking function within days of stroke admission can help to streamline discharge planning. LAY SUMMARY: Nearly one-half of all individuals who experience a first-time stroke have walking difficulty when they arrive at the hospital. The severity of the walking limitation can predict whether a patient will eventually be discharged home or go on to further hospitalization.


Assuntos
Transtornos Neurológicos da Marcha/reabilitação , Limitação da Mobilidade , Alta do Paciente , Reabilitação do Acidente Vascular Cerebral/métodos , Caminhada/fisiologia , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Feminino , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Prevalência
19.
J Cell Biol ; 221(2)2022 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-35024764

RESUMO

The repertoire of extratranslational functions of components of the protein synthesis apparatus is expanding to include control of key cell signaling networks. However, very little is known about noncanonical functions of members of the protein synthesis machinery in regulating cellular mechanics. We demonstrate that the eukaryotic initiation factor 6 (eIF6) modulates cellular mechanobiology. eIF6-depleted endothelial cells, under basal conditions, exhibit unchanged nascent protein synthesis, polysome profiles, and cytoskeleton protein expression, with minimal effects on ribosomal biogenesis. In contrast, using traction force and atomic force microscopy, we show that loss of eIF6 leads to reduced stiffness and force generation accompanied by cytoskeletal and focal adhesion defects. Mechanistically, we show that eIF6 is required for the correct spatial mechanoactivation of ERK1/2 via stabilization of an eIF6-RACK1-ERK1/2-FAK mechanocomplex, which is necessary for force-induced remodeling. These results reveal an extratranslational function for eIF6 and a novel paradigm for how mechanotransduction, the cellular cytoskeleton, and protein translation constituents are linked.


Assuntos
Células Endoteliais/metabolismo , Mecanotransdução Celular , Fatores de Iniciação de Peptídeos/metabolismo , Animais , Fenômenos Biomecânicos , Bovinos , Citoesqueleto/metabolismo , Adesões Focais/metabolismo , Células HEK293 , Humanos , Sistema de Sinalização das MAP Quinases , Camundongos , Biossíntese de Proteínas , Ribossomos/metabolismo
20.
Trials ; 23(1): 129, 2022 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-35135585

RESUMO

BACKGROUND: Encouraging upper limb use and increasing intensity of practice in rehabilitation are two important goals for optimizing upper limb recovery post stroke. Feedback from novel wearable sensors may influence practice behaviour to promote achieving these goals. A wearable sensor can potentially be used in conjunction with a virtually monitored home program for greater patient convenience, or due to restrictions that preclude in-person visits, such as COVID-19. This trial aims to (1) determine the efficacy of a virtual behaviour change program that relies on feedback from a custom wearable sensor to increase use and function of the upper limb post stroke; and (2) explore the experiences and perceptions of using a program coupled with wearable sensors to increase arm use from the perspective of people with stroke. METHODS: This mixed-methods study will utilize a prospective controlled trial with random allocation to immediate or 3-week delayed entry to determine the efficacy of a 3-week behaviour change program with a nested qualitative description study. The intervention, the Virtual Arm Boot Camp (V-ABC) features feedback from a wearable device, which is intended to increase upper limb use post stroke, as well as 6 virtual sessions with a therapist. Sixty-four adults within 1-year post stroke onset will be recruited from seven rehabilitation centres. All outcomes will be collected virtually. The primary outcome measure is upper limb use measured by grasp counts over 3 days from the wearable sensor (TENZR) after the 3-week intervention. Secondary outcomes include upper limb function (Arm Capacity and Movement Test) and self-reported function (Hand Function and Strength subscale from the Stroke Impact Scale). Outcome data will be collected at baseline, post-intervention and at 2 months retention. The qualitative component will explore the experiences and acceptability of using a home program with a wearable sensor for increasing arm use from the point of view of individuals with stroke. Semi-structured interviews will be conducted with participants after they have experienced the intervention. Qualitative data will be analysed using content analysis. DISCUSSION: This study will provide novel information regarding the efficacy and acceptability of virtually delivered programs to improve upper extremity recovery, and the use of wearable sensors to assist with behaviour change. TRIAL REGISTRATION: ClinicalTrials.gov NCT04232163 . January 18, 2020.


Assuntos
COVID-19 , Reabilitação do Acidente Vascular Cerebral , Adulto , Braço , Força da Mão , Humanos , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Recuperação de Função Fisiológica , SARS-CoV-2 , Resultado do Tratamento , Extremidade Superior
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