Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 43
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Pharmacogenomics J ; 19(6): 528-537, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-30713337

RESUMO

Effective doctor-patient communication is critical for disease management, especially when considering genetic information. We studied patient-provider communications after implementing a point-of-care pharmacogenomic results delivery system to understand whether pharmacogenomic results are discussed and whether medication recall is impacted. Outpatients undergoing preemptive pharmacogenomic testing (cases), non-genotyped controls, and study providers were surveyed from October 2012-May 2017. Patient responses were compared between visits where pharmacogenomic results guided prescribing versus visits where pharmacogenomics did not guide prescribing. Provider knowledge of pharmacogenomics, before and during study participation, was also analyzed. Both providers and case patients frequently reported discussions of genetic results after visits where pharmacogenomic information guided prescribing. Importantly, medication changes from visits where pharmacogenomics influenced prescribing were more often recalled than non-pharmacogenomic guided medication changes (OR = 3.3 [1.6-6.7], p = 0.001). Case patients who had separate visits where pharmacogenomics did and did not, respectively, influence prescribing more often remembered medication changes from visits where genomic-based guidance was used (OR = 3.4 [1.2-9.3], p = 0.02). Providers also displayed dramatic increases in personal genomic understanding through program participation (94% felt at least somewhat informed about pharmacogenomics post-participation, compared to 61% at baseline, p = 0.04). Using genomic information during prescribing increases patient-provider communications, patient medication recall, and provider understanding of genomics, important ancillary benefits to clinical use of pharmacogenomics.


Assuntos
Prescrições de Medicamentos/normas , Farmacogenética/normas , Medicamentos sob Prescrição/normas , Comunicação , Gerenciamento Clínico , Recall de Medicamento , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Testes Farmacogenômicos/métodos , Relações Médico-Paciente , Sistemas Automatizados de Assistência Junto ao Leito/normas , Medicina de Precisão/normas , Pesquisa/normas
2.
Biochim Biophys Acta ; 1857(12): 1829-1839, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27614060

RESUMO

A challenge associated with the utilisation of bioenergetic proteins in new, synthetic energy transducing systems is achieving efficient and predictable self-assembly of individual components, both natural and man-made, into a functioning macromolecular system. Despite progress with water-soluble proteins, the challenge of programming self-assembly of integral membrane proteins into non-native macromolecular architectures remains largely unexplored. In this work it is shown that the assembly of dimers, trimers or tetramers of the naturally monomeric purple bacterial reaction centre can be directed by augmentation with an α-helical peptide that self-associates into extra-membrane coiled-coil bundle. Despite this induced oligomerisation the assembled reaction centres displayed normal spectroscopic properties, implying preserved structural and functional integrity. Mixing of two reaction centres modified with mutually complementary α-helical peptides enabled the assembly of heterodimers in vitro, pointing to a generic strategy for assembling hetero-oligomeric complexes from diverse modified or synthetic components. Addition of two coiled-coil peptides per reaction centre monomer was also tolerated despite the challenge presented to the pigment-protein assembly machinery of introducing multiple self-associating sequences. These findings point to a generalised approach where oligomers or longer range assemblies of multiple light harvesting and/or redox proteins can be constructed in a manner that can be genetically-encoded, enabling the construction of new, designed bioenergetic systems in vivo or in vitro.


Assuntos
Proteínas de Bactérias/metabolismo , Metabolismo Energético , Complexos de Proteínas Captadores de Luz/metabolismo , Fotossíntese , Complexo de Proteínas do Centro de Reação Fotossintética/metabolismo , Proteobactérias/metabolismo , Adaptação Fisiológica , Proteínas de Bactérias/química , Proteínas de Bactérias/efeitos da radiação , Metabolismo Energético/efeitos da radiação , Cinética , Luz , Complexos de Proteínas Captadores de Luz/química , Complexos de Proteínas Captadores de Luz/efeitos da radiação , Simulação de Dinâmica Molecular , Fotossíntese/efeitos da radiação , Complexo de Proteínas do Centro de Reação Fotossintética/química , Complexo de Proteínas do Centro de Reação Fotossintética/efeitos da radiação , Conformação Proteica em alfa-Hélice , Multimerização Proteica , Proteobactérias/efeitos da radiação , Relação Estrutura-Atividade
3.
Am J Med Genet C Semin Med Genet ; 166C(1): 68-75, 2014 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24616296

RESUMO

Pharmacogenomic testing is viewed as an integral part of precision medicine. To achieve this, we originated The 1,200 Patients Project which offers broad, preemptive pharmacogenomic testing to patients at our institution. We analyzed enrollment, genotype, and encounter-level data from the first year of implementation to assess utility of providing pharmacogenomic results. Results were delivered via a genomic prescribing system (GPS) in the form of traffic lights: green (favorable), yellow (caution), and red (high risk). Additional supporting information was provided as a virtual pharmacogenomic consult, including citation to relevant publications. Currently, 812 patients have participated, representing 90% of those approached; 608 have been successfully genotyped across a custom array. A total of 268 clinic encounters have occurred at which results were accessible via the GPS. At 86% of visits, physicians accessed the GPS, receiving 367 result signals for medications patients were taking: 57% green lights, 41% yellow lights, and 1.4% red lights. Physician click frequencies to obtain clinical details about alerts varied according to color severity (100% of red were clicked, 72% yellow, 20% green). For 85% of visits, clinical pharmacogenomic information was available for at least one drug the patient was taking, suggesting relevance of the delivered information. We successfully implemented an individualized health care model of preemptive pharmacogenomic testing, delivering results along with pharmacogenomic decision support. Patient interest was robust, physician adoption of information was high, and results were routinely utilized. Ongoing examination of a larger number of clinic encounters and inclusion of more physicians and patients is warranted.


Assuntos
Centros Médicos Acadêmicos/métodos , Assistência Ambulatorial/métodos , Farmacogenética/métodos , Desenvolvimento de Programas/métodos , Centros Médicos Acadêmicos/tendências , Adulto , Idoso , Idoso de 80 Anos ou mais , Chicago , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Farmacogenética/estatística & dados numéricos , Farmacogenética/tendências , Desenvolvimento de Programas/estatística & dados numéricos
4.
Front Immunol ; 15: 1415102, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39007132

RESUMO

Human regulatory T cells (Treg) suppress other immune cells. Their dysfunction contributes to the pathophysiology of autoimmune diseases, including type 1 diabetes (T1D). Infusion of Tregs is being clinically evaluated as a novel way to prevent or treat T1D. Genetic modification of Tregs, most notably through the introduction of a chimeric antigen receptor (CAR) targeting Tregs to pancreatic islets, may improve their efficacy. We evaluated CAR targeting of human Tregs to monocytes, a human ß cell line and human islet ß cells in vitro. Targeting of HLA-A2-CAR (A2-CAR) bulk Tregs to HLA-A2+ cells resulted in dichotomous cytotoxic killing of human monocytes and islet ß cells. In exploring subsets and mechanisms that may explain this pattern, we found that CD39 expression segregated CAR Treg cytotoxicity. CAR Tregs from individuals with more CD39low/- Tregs and from individuals with genetic polymorphism associated with lower CD39 expression (rs10748643) had more cytotoxicity. Isolated CD39- CAR Tregs had elevated granzyme B expression and cytotoxicity compared to the CD39+ CAR Treg subset. Genetic overexpression of CD39 in CD39low CAR Tregs reduced their cytotoxicity. Importantly, ß cells upregulated protein surface expression of PD-L1 and PD-L2 in response to A2-CAR Tregs. Blockade of PD-L1/PD-L2 increased ß cell death in A2-CAR Treg co-cultures suggesting that the PD-1/PD-L1 pathway is important in protecting islet ß cells in the setting of CAR immunotherapy. In summary, introduction of CAR can enhance biological differences in subsets of Tregs. CD39+ Tregs represent a safer choice for CAR Treg therapies targeting tissues for tolerance induction.


Assuntos
Apirase , Receptores de Antígenos Quiméricos , Linfócitos T Reguladores , Humanos , Apirase/imunologia , Apirase/metabolismo , Linfócitos T Reguladores/imunologia , Receptores de Antígenos Quiméricos/imunologia , Receptores de Antígenos Quiméricos/genética , Receptores de Antígenos Quiméricos/metabolismo , Citotoxicidade Imunológica , Ilhotas Pancreáticas/imunologia , Ilhotas Pancreáticas/metabolismo , Diabetes Mellitus Tipo 1/imunologia , Diabetes Mellitus Tipo 1/terapia , Antígeno HLA-A2/imunologia , Antígeno HLA-A2/genética , Antígeno HLA-A2/metabolismo , Subpopulações de Linfócitos T/imunologia , Subpopulações de Linfócitos T/metabolismo , Células Secretoras de Insulina/imunologia , Células Secretoras de Insulina/metabolismo , Antígenos CD
5.
Acta Orthop Belg ; 79(3): 260-5, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23926726

RESUMO

We previously reported early favourable results concerning allograft use in proximal humerus reconstruction following malignancy. We now present the long-term follow-up of patients who underwent tumour resection with massive humeral allograft reconstruction. This is a retrospective review of 8 consecutive patients who underwent massive proximal humeral allograft for primary or secondary bone tumours. The median age at first surgery was 41 years; the median followup is 11.1 years. The overall revision rate of the allografts was 75%. A total of 10 revision procedures were required in this cohort. Five-year survival for implants was 44%; at ten years no implants were intact. Five-year survival for patients was 88%; it was 60% at ten years. In our experience, proximal humerus allograft reconstruction was associated with a high complication rate and resulted in multiple revision procedures in the long-term. We no longer perform or recommend this procedure.


Assuntos
Neoplasias Ósseas/cirurgia , Úmero/transplante , Sarcoma/cirurgia , Adolescente , Adulto , Idoso , Neoplasias Ósseas/secundário , Feminino , Seguimentos , Humanos , Salvamento de Membro , Masculino , Pessoa de Meia-Idade , Procedimentos de Cirurgia Plástica , Reoperação/estatística & dados numéricos , Sarcoma/secundário , Transplante Homólogo , Adulto Jovem
7.
Med Teach ; 34(2): e116-22, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22289009

RESUMO

BACKGROUND: Although medical student specialty choices shape the future of the healthcare workforce, factors influencing changes in specialty preference during training remain poorly understood. AIM: To explore if medical student distress and empathy predicts changes in students' specialty preference. METHODS: A total of 858/1321 medical students attending five medical schools responded to surveys in 2006 and 2007. The survey included questions about specialty choice, burnout, depression, quality of life, and empathy. RESULTS: A total of 26% (205/799) changed their specialty preference over 1 year. Depersonalization--an aspect of burnout--was the only distress variable associated with change in specialty preference (OR, odds ratio 0.962 for each 1-point increase in score, p = 0.03). Empathy at baseline and changes in empathy over the course of 1 year did not predict change in specialty preference (all p > 0.05). On multi-variable analysis, being a third year (OR 1.92), being male (OR 1.48), and depersonalization score (OR 0.962 for each point increase) independently predicted a change in specialty preference. Distress and empathy did not independently predict students' losing interest in primary care whereas being a fourth-year student (OR 1.83) and being female (OR 1.83) did. CONCLUSION: Among those who did have a major change in their specialty preference, distress and empathy did not play a major role.


Assuntos
Esgotamento Profissional/psicologia , Escolha da Profissão , Especialização , Estudantes de Medicina/psicologia , Distribuição de Qui-Quadrado , Despersonalização/psicologia , Empatia , Feminino , Humanos , Estudos Longitudinais , Masculino , Fatores Sexuais , Estresse Psicológico/psicologia , Estudantes de Medicina/estatística & dados numéricos , Inquéritos e Questionários , Estados Unidos
8.
Cureus ; 14(6): e25690, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35812622

RESUMO

Thyroid storm (TS) and pulmonary embolus (PE) are both dangerous conditions. We present a case of a 34-year-old woman suffering from both conditions concomitantly. She was given propranolol, propylthiouracil (PTU), potassium iodide (SSKI), hydrocortisone, and heparin, and improved gradually over the course of a 5-day hospitalization. The patient's presentation provided difficulties in diagnosis as well as management. Based on our experience with this case, we recommend that the practitioner refrains from prematurely anchoring on one diagnosis without a full workup for the other, as these conditions can be mutually causative. Also, if the patient meets the criteria for TS, it is important to treat them as such, even in the setting of "unimpressive" thyroid study abnormalities. Finally, it is important to administer a beta blocker in the setting of TS, even in the combined setting of PE, as long as the patient has no evidence of heart strain.

9.
CJC Open ; 4(6): 568-576, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35252829

RESUMO

Background: Effective treatments for COVID-19 are urgently needed, but conducting randomized trials during the pandemic has been challenging. Methods: The Anti-Coronavirus Therapy (ACT) trials are parallel factorial international trials that aimed to enroll 3500 outpatients and 2500 inpatients with symptomatic COVID-19. The outpatient trial is evaluating colchicine vs usual care, and aspirin vs usual care. The primary outcome for the colchicine randomization is hospitalization or death, and for the aspirin randomization, it is major thrombosis, hospitalization, or death. The inpatient trial is evaluating colchicine vs usual care, and the combination of rivaroxaban 2.5 mg twice daily and aspirin 100 mg once daily vs usual care. The primary outcome for the colchicine randomization is need for high-flow oxygen, need for mechanical ventilation, or death, and for the rivaroxaban plus aspirin randomization, it is major thrombotic events, need for high-flow oxygen, need for mechanical ventilation, or death. Results: At the completion of enrollment on February 10, 2022, the outpatient trial had enrolled 3917 patients, and the inpatient trial had enrolled 2611 patients. Challenges encountered included lack of preliminary data about the interventions under evaluation, uncertainties related to the expected event rates, delays in regulatory and ethics approvals, and in obtaining study interventions, as well as the changing pattern of the COVID-19 pandemic. Conclusions: The ACT trials will determine the efficacy of anti-inflammatory therapy with colchicine, and antithrombotic therapy with aspirin given alone or in combination with rivaroxaban, across the spectrum of mild, moderate, and severe COVID-19. Lessons learned from the conduct of these trials will inform planning of future trials.


Contexte: Il est urgent de mettre au point des traitements efficaces contre la COVID-19, mais il n'est pas facile de réaliser des essais à répartition aléatoire dans un contexte pandémique. Méthodologie: Les essais internationaux factoriels ACT (Anti-Coronavirus Therapy) avaient un objectif d'inscription de 3 500 patients externes et de 2 500 patients hospitalisés présentant une COVID-19 symptomatique. L'essai mené auprès de patients externes visait à évaluer la colchicine par rapport aux soins habituels, et l'aspirine par rapport aux soins habituels. Le paramètre d'évaluation principal au terme de la répartition aléatoire des patients était l'hospitalisation ou le décès dans le groupe traité par la colchicine, et la thrombose majeure, l'hospitalisation ou le décès dans le groupe traité par l'aspirine. L'essai mené auprès de patients hospitalisés visant à évaluer la colchicine par rapport aux soins habituels, et un traitement associant le rivaroxaban à 2,5 mg deux fois par jour et l'aspirine à 100 mg une fois par jour par rapport aux soins habituels. Le paramètre d'évaluation principal au terme de la répartition aléatoire des patients était le recours à l'oxygénothérapie à haut débit ou à la ventilation mécanique ou le décès dans le groupe traité par la colchicine, et la survenue de manifestations thrombotiques majeures, le recours à l'oxygénothérapie à haut débit ou à la ventilation mécanique ou le décès dans le groupe traité par l'association rivaroxaban-aspirine. Résultats: À la fin de la période d'inscription, le 10 février 2022, 3 917 patients externes et 2 611 patients hospitalisés formaient la population des essais. Certains aspects se sont révélés problématiques, notamment le manque de données préliminaires sur les interventions à évaluer, les incertitudes liées aux taux d'événements prévus, les retards touchant les approbations réglementaires et éthiques et les interventions de recherche, de même que l'évolution de la pandémie de COVID-19. Conclusions: Les essais ACT détermineront l'efficacité du traitement anti-inflammatoire par la colchicine et du traitement antithrombotique par l'aspirine, administrée seule ou en association avec le rivaroxaban, contre la COVID-19 légère, modérée ou sévère. Les leçons tirées de ces essais orienteront la planification d'essais ultérieurs.

10.
Lancet Respir Med ; 10(12): 1160-1168, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36228639

RESUMO

BACKGROUND: The large number of patients worldwide infected with the SARS-CoV-2 virus has overwhelmed health-care systems globally. The Anti-Coronavirus Therapies (ACT) outpatient trial aimed to evaluate anti-inflammatory therapy with colchicine and antithrombotic therapy with aspirin for prevention of disease progression in community patients with COVID-19. METHODS: The ACT outpatient, open-label, 2 × 2 factorial, randomised, controlled trial, was done at 48 clinical sites in 11 countries. Patients in the community aged 30 years and older with symptomatic, laboratory confirmed COVID-19 who were within 7 days of diagnosis and at high risk of disease progression were randomly assigned (1:1) to receive colchicine 0·6 mg twice daily for 3 days and then 0·6 mg once daily for 25 days versus usual care, and in a second (1:1) randomisation to receive aspirin 100 mg once daily for 28 days versus usual care. Investigators and patients were not masked to treatment allocation. The primary outcome was assessed at 45 days in the intention-to-treat population; for the colchicine randomisation it was hospitalisation or death, and for the aspirin randomisation it was major thrombosis, hospitalisation, or death. The ACT outpatient trial is registered at ClinicalTrials.gov, NCT04324463 and is ongoing. FINDINGS: Between Aug 27, 2020, and Feb 10, 2022, 3917 patients were randomly assigned to colchicine or control and to aspirin or control; after excluding 36 patients due to administrative reasons 3881 individuals were included in the analysis (n=1939 colchicine vs n=1942 control; n=1945 aspirin vs 1936 control). Follow-up was more than 99% complete. Overall event rates were 5 (0·1%) of 3881 for major thrombosis, 123 (3·2%) of 3881 for hospitalisation, and 23 (0·6%) of 3881 for death; 66 (3·4%) of 1939 patients allocated to colchicine and 65 (3·3%) of 1942 patients allocated to control experienced hospitalisation or death (hazard ratio [HR] 1·02, 95% CI 0·72-1·43, p=0·93); and 59 (3·0%) of 1945 of patients allocated to aspirin and 73 (3·8%) of 1936 patients allocated to control experienced major thrombosis, hospitalisation, or death (HR 0·80, 95% CI 0·57-1·13, p=0·21). Results for the primary outcome were consistent in all prespecified subgroups, including according to baseline vaccination status, timing of randomisation in relation to onset of symptoms (post-hoc analysis), and timing of enrolment according to the phase of the pandemic (post-hoc analysis). There were more serious adverse events with colchicine than with control (34 patients [1·8%] of 1939 vs 27 [1·4%] of 1942) but none in either group that led to discontinuation of study interventions. There was no increase in serious adverse events with aspirin versus control (31 [1·6%] vs 31 [1·6%]) and none that led to discontinuation of study interventions. INTERPRETATION: The results provide no support for the use of colchicine or aspirin to prevent disease progression or death in outpatients with COVID-19. FUNDING: Canadian Institutes for Health Research, Bayer, Population Health Research Institute, Hamilton Health Sciences Research Institute, and Thistledown Foundation. TRANSLATIONS: For the Portuguese, Russian and Spanish translations of the abstract see Supplementary Materials section.


Assuntos
COVID-19 , Trombose , Humanos , Aspirina/uso terapêutico , SARS-CoV-2 , Colchicina/uso terapêutico , Resultado do Tratamento , Canadá , Progressão da Doença
11.
Lancet Respir Med ; 10(12): 1169-1177, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36228641

RESUMO

BACKGROUND: COVID-19 disease is accompanied by a dysregulated immune response and hypercoagulability. The Anti-Coronavirus Therapies (ACT) inpatient trial aimed to evaluate anti-inflammatory therapy with colchicine and antithrombotic therapy with the combination of rivaroxaban and aspirin for prevention of disease progression in patients hospitalised with COVID-19. METHODS: The ACT inpatient, open-label, 2 × 2 factorial, randomised, controlled trial was done at 62 clinical centres in 11 countries. Patients aged at least 18 years with symptomatic, laboratory confirmed COVID-19 who were within 72 h of hospitalisation or worsening clinically if already hospitalised were randomly assigned (1:1) to receive colchicine 1·2 mg followed by 0·6 mg 2 h later and then 0·6 mg twice daily for 28 days versus usual care; and in a second (1:1) randomisation, to the combination of rivaroxaban 2·5 mg twice daily plus aspirin 100 mg once daily for 28 days versus usual care. Investigators and patients were not masked to treatment allocation. The primary outcome, assessed at 45 days in the intention-to-treat population, for the colchicine randomisation was the composite of the need for high-flow oxygen, mechanical ventilation, or death; and for the rivaroxaban plus aspirin randomisation was the composite of major thrombosis (myocardial infarction, stroke, acute limb ischaemia, or pulmonary embolism), the need for high-flow oxygen, mechanical ventilation, or death. The trial is registered at www. CLINICALTRIALS: gov, NCT04324463 and is ongoing. FINDINGS: Between Oct 2, 2020, and Feb 10, 2022, at 62 sites in 11 countries, 2749 patients were randomly assigned to colchicine or control and the combination of rivaroxaban and aspirin or to the control. 2611 patients were included in the analysis of colchicine (n=1304) versus control (n=1307); 2119 patients were included in the analysis of rivaroxaban and aspirin (n=1063) versus control (n=1056). Follow-up was more than 98% complete. Overall, 368 (28·2%) of 1304 patients allocated to colchicine and 356 (27·2%) of 1307 allocated to control had a primary outcome (hazard ratio [HR] 1·04, 95% CI 0·90-1·21, p=0·58); and 281 (26·4%) of 1063 patients allocated to the combination of rivaroxaban and aspirin and 300 (28·4%) of 1056 allocated to control had a primary outcome (HR 0·92, 95% CI 0·78-1·09, p=0·32). Results were consistent in subgroups defined by vaccination status, disease severity at baseline, and timing of randomisation in relation to onset of symptoms. There was no increase in the number of patients who had at least one serious adverse event for colchicine versus control groups (87 [6·7%] of 1304 vs 90 [6·9%] of 1307) or with rivaroxaban and aspirin versus control groups (85 [8·0%] vs 91 [8·6%]). Among patients assigned to colchicine, 8 (0·61%) had adverse events that led to discontinuation of study drug, mostly gastrointestinal in nature. 17 (1·6%) patients assigned to the combination of rivaroxaban and aspirin had bleeding compared with seven (0·66%) of those allocated to control (p=0·042); the number of serious bleeding events was two (0·19%) versus six (0·57%), respectively (p=0·18). No patients assigned to rivaroxaban and aspirin had serious adverse events that led to discontinuation of study drug. INTERPRETATION: Among patients hospitalised with COVID-19, neither colchicine nor the combination of rivaroxaban and aspirin prevent disease progression or death. FUNDING: Canadian Institutes for Health Research, Bayer, Population Health Research Institute, Hamilton Health Sciences Research Institute, Thistledown Foundation. TRANSLATIONS: For the Portuguese, Russian and Spanish translations of the abstract see Supplementary Materials section.


Assuntos
Tratamento Farmacológico da COVID-19 , Rivaroxabana , Humanos , Adolescente , Adulto , Rivaroxabana/uso terapêutico , Rivaroxabana/efeitos adversos , Aspirina/uso terapêutico , Colchicina/efeitos adversos , Canadá , Progressão da Doença , Oxigênio , Resultado do Tratamento
12.
Science ; 376(6594): eabl4896, 2022 05 13.
Artigo em Inglês | MEDLINE | ID: mdl-35549404

RESUMO

Molecular characterization of cell types using single-cell transcriptome sequencing is revolutionizing cell biology and enabling new insights into the physiology of human organs. We created a human reference atlas comprising nearly 500,000 cells from 24 different tissues and organs, many from the same donor. This atlas enabled molecular characterization of more than 400 cell types, their distribution across tissues, and tissue-specific variation in gene expression. Using multiple tissues from a single donor enabled identification of the clonal distribution of T cells between tissues, identification of the tissue-specific mutation rate in B cells, and analysis of the cell cycle state and proliferative potential of shared cell types across tissues. Cell type-specific RNA splicing was discovered and analyzed across tissues within an individual.


Assuntos
Atlas como Assunto , Células , Especificidade de Órgãos , Splicing de RNA , Análise de Célula Única , Transcriptoma , Linfócitos B/metabolismo , Células/metabolismo , Humanos , Especificidade de Órgãos/genética , Linfócitos T/metabolismo
13.
Med Teach ; 33(10): 834-9, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21942482

RESUMO

BACKGROUND: How multiple forms of psychological distress coexist in individual medical students has not been formally studied. AIM: To explore the prevalence of various forms of distress in medical students and their relationship to recent suicidal ideation or serious thoughts of dropping out of school. METHODS: All medical students at seven US schools were surveyed with standardized instruments to evaluate burnout, depression, stress, mental quality of life (QOL), physical QOL, and fatigue. Additional items explored recent suicidal ideation and serious thoughts of dropping out of medical school. RESULTS: Nearly all (1846/2246, 82%) of medical students had at least one form of distress with 1066 (58%) having ≥3 forms of distress. A dose-response relationship was found between the number of manifestations of distress and recent suicidal ideation or serious thoughts of dropping out. For example, students with 2, 4, or 6 forms of distress were 5, 15, and 24 fold, respectively, more likely to have suicidal ideation than students with no forms of distress assessed. All forms of distress were independently associated with suicidal ideation or serious thoughts of dropping out on multivariable analysis. CONCLUSIONS: Most medical students experience ≥1 manifestation of distress with many experiencing multiple forms of distress simultaneously. The more forms of distress experienced the greater the risk for suicidal ideation and thoughts of dropping out of medical school.


Assuntos
Adaptação Psicológica , Esgotamento Profissional/psicologia , Faculdades de Medicina/tendências , Meio Social , Estudantes de Medicina/psicologia , Adulto , Esgotamento Profissional/epidemiologia , Coleta de Dados , Depressão/epidemiologia , Depressão/psicologia , Fadiga , Feminino , Humanos , Modelos Logísticos , Masculino , Prevalência , Psicometria , Qualidade de Vida/psicologia , Fatores de Risco , Estresse Psicológico/complicações , Estresse Psicológico/psicologia , Ideação Suicida , Estados Unidos
14.
Med Teach ; 33(9): 756-8, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21854153

RESUMO

BACKGROUND: Distress is prevalent among residents and often attributed to rigors of training. AIMS: To explore the prevalence of burnout and depression and measured mental quality of life (QOL) among graduating medical students shortly before they began residency. METHOD: Pooled analysis of data from 1428 fourth year medical students who responded to 1 of 3 multi-institutional studies. Students completed the Maslach Burnout Inventory, PRIME MD, and SF-8 to measure burnout, depression, and low mental QOL (defined as mean mental SF-8 scores ½ a standard deviation below the population norm) and answered demographic items. RESULTS: Shortly before beginning residency, 49% of responding medical students had burnout, 38% endorsed depressive symptoms, and 34% had low mental QOL. While no differences in the prevalence of distress was observed by residency specialty area, there were subtle differences in the manifestation of burnout by specialty. Medical students entering surgical fields had lower mean emotional scores, students entering primary care fields had lower mean depersonalization scores, and students entering non-primary care/non-surgical fields reported the lowest mean personal accomplishment scores (all p ≤ 0.03). CONCLUSION: Our results indicate a high prevalence of distress among graduating medical students across all specialty disciplines before they even begin residency training.


Assuntos
Estresse Psicológico , Estudantes de Medicina/psicologia , Esgotamento Profissional/epidemiologia , Depressão/epidemiologia , Feminino , Humanos , Internato e Residência , Masculino , Qualidade de Vida , Inquéritos e Questionários , Estados Unidos/epidemiologia
15.
Indian Pacing Electrophysiol J ; 11(5): 134-44, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21994471

RESUMO

AIMS: The goals of this study were to apply the 2001 ACEP recommendations for admission to hospital after a syncopal event and to validate the OESIL risk stratification score, in patients with syncope admitted to a general internal medicine ward. METHODS: A retrospective study applied the 2001 ACEP recommendations and OESIL score to all the patients admitted from the emergency department to a general internal medicine ward with a diagnosis of syncope during a 12-month period. The patients were classified as meeting criteria for 2001 ACEP class B or C recommendations and OESIL score 0-1 (low-risk for a major cardiac event) or 2-4 (high-risk for a major cardiac event). The sensitivity and specificity of each group for predicting high-risk patients was calculated. RESULTS: After applying the 2001 ACEP recommendations to our population, 25% (19 patients) were classified as level B, whereas 68% of the patients were classified as Level C. Sensitivity for ACEP level B recommendations was 100% and specificity was 81%. The ACEP level C recommendations also had 100% sensitivity but markedly reduced specificity at 26%. An OESIL score of 0-1 points was calculated for 30.6% of the population, identifying them as low-risk. An OESIL score of 2-4 points was documented in the remaining 69.4% with a mortality risk of 20 % /year. CONCLUSION: A significant proportion (30%) of patients presenting with syncope to a tertiary care University Hospital emergency department and admitted to an Internal Medicine ward were retrospectively classified as low-risk and could have potentially been managed as outpatients. Implementing current guidelines and clinical pathways for the management of syncope may improve this approach.

16.
CJC Open ; 3(12 Suppl): S53-S61, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34993434

RESUMO

BACKGROUND: Achieving diversity, inclusion, and gender equity remains an elusive challenge for many institutions worldwide and is understudied in Canadian academic health science centres. METHODS: McMaster University's Department of Medicine undertook surveys and analyses to determine whether there was inequity in leadership positions and salaries, or unprofessional behaviour within the department. Measures of academic productivity in relation to gender for both educators and researchers were analyzed. The department began shifting policies to foster greater gender diversity and inclusion. A revision of the leadership selection process, incorporating tenets of equity and a new game theory-based strategy called Diversitive Agreement Versus Nash Equilibrium (DAvNE) was evaluated. RESULTS: The department's survey revealed underrepresentation of women and people of colour in leadership positions, with perceived barriers to their promotion. Both women and people of colour reported experiencing unprofessional behaviour directed toward them. A gender gap in base salary was observed, with female full professors being paid less. No difference in academic productivity was seen between male and female educators or researchers. The leadership competitions conducted under new selection processes emphasizing diversity resulted in 66% of participating women securing a leadership position, in comparison to 25% of participating men. People of colour made up 27% of members participating in these leadership competitions, but none was successful in obtaining a position. CONCLUSIONS: Diversity and inclusion disparities in the Department of Medicine at McMaster University indicate a need for further efforts and innovation to bring about greater gender and racial equity.


CONTEXTE: La mise en place des conditions nécessaires à la diversité, à l'inclusion et à l'équité des genres demeure un défi difficile à relever pour de nombreux établissements dans le monde entier. C'est une démarche peu étudiée dans les centres universitaires canadiens des sciences de la santé. MÉTHODOLOGIE: Le département de médecine de l'Université McMaster a mené des sondages et des analyses en vue de déterminer s'il existait en son sein même des iniquités en matière d'attribution des postes de direction et de fixation des salaires, ou des comportements non professionnels. Des mesures de la productivité universitaire des éducateurs et des chercheurs ont été analysées en fonction des genres. Le département a entrepris une réforme de ses politiques afin de favoriser une plus grande diversité et inclusion des genres. Une révision du processus de sélection des candidats aux postes de direction, intégrant les principes d'équité et une nouvelle stratégie fondée sur la théorie des jeux appelée Diversitive Agreement Versus Nash Equilibrium (DAvNE [accord de diversité vs équilibre de Nash]), a été évaluée. RÉSULTATS: Le sondage du département a révélé qu'il existait une sous-représentation des femmes et des personnes de couleur parmi les titulaires des postes de direction, ainsi que des obstacles perçus à leur promotion. Tant les femmes que les personnes de couleur ont fait état de comportements non professionnels à leur endroit. Un écart entre les genres a été observé au chapitre de la rémunération de base, les professeurs titulaires de sexe féminin étant moins rémunérées. Aucune différence n'a été observée sur le plan de la productivité universitaire entre les femmes et les hommes au sein de l'effectif des éducateurs et des chercheurs. Les concours pour les postes de direction ont été organisés en fonction de nouveaux processus de sélection mettant l'accent sur la diversité. Au final, 66 % des candidats qui ont vu leur candidature retenue étaient des femmes et 25 %, des hommes. Dans le cadre de ces concours, 27 % des candidats étaient des personnes de couleur, mais aucun n'a réussi à obtenir un poste. CONCLUSIONS: Les disparités notées en matière de diversité et d'inclusion au sein du département de médecine de l'Université McMaster montrent que l'atteinte d'une plus grande équité des genres et des races passe par des efforts et une innovation soutenus.

17.
Med Educ ; 44(10): 1016-26, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-20880371

RESUMO

CONTEXT: Burnout is prevalent among medical students and is a predictor of subsequent serious consideration of dropping out of medical school and suicide ideation. Understanding of the factors that protect against burnout is needed to guide student wellness programmes. METHODS: A total of 1321 medical students attending five institutions were studied longitudinally (2006-2007). The surveys included standardised instruments to evaluate burnout, quality of life, fatigue and stress. Additional items explored social support, learning climate, life events, employment status and demographics. Students who did not have burnout at either time-point (resilient students) were compared with those who indicated burnout at one or both time-points (vulnerable students) using a Wilcoxon-Mann-Whitney test or Fisher's exact test. Similarly, the differences between those who recovered and those who were chronically burned out were also compared in students with burnout at the first time-point. Logistic regression modelling was employed to evaluate associations between the independent variables and resiliency to and recovery from burnout. RESULTS: Overall, 792 (60.0%) students completed the burnout inventory at both time-points. No differences in demographic characteristics were observed between resilient (290/792 [36.6%]) and vulnerable (502/792 [63.4%]) students. Resilient students were less likely to experience depression, had a higher quality of life, were less likely to be employed, had experienced fewer stressful life events, reported higher levels of social support, perceived their learning climate more positively and experienced less stress and fatigue (all p < 0.05) than vulnerable students. On multivariable analysis, perceiving student education as a priority for faculty staff, experiencing less stress, not being employed and being a minority were factors independently associated with recovery from burnout. CONCLUSIONS: Modifiable individual factors and learning climate characteristics including employment status, stress level and perceptions of the prioritising of student education by faculty members relate to medical students' vulnerability to burnout.


Assuntos
Esgotamento Profissional/psicologia , Resiliência Psicológica , Estudantes de Medicina/psicologia , Adulto , Fadiga/psicologia , Feminino , Humanos , Acontecimentos que Mudam a Vida , Masculino , Estudos Prospectivos , Qualidade de Vida , Apoio Social , Estados Unidos , Adulto Jovem
18.
JAMA ; 304(11): 1173-80, 2010 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-20841530

RESUMO

CONTEXT: The relationship between professionalism and distress among medical students is unknown. OBJECTIVE: To determine the relationship between measures of professionalism and burnout among US medical students. DESIGN, SETTING, AND PARTICIPANTS: Cross-sectional survey of all medical students attending 7 US medical schools (overall response rate, 2682/4400 [61%]) in the spring of 2009. The survey included the Maslach Burnout Inventory (MBI), the PRIME-MD depression screening instrument, and the SF-8 quality of life (QOL) assessment tool, as well as items exploring students' personal engagement in unprofessional conduct, understanding of appropriate relationships with industry, and attitudes regarding physicians' responsibility to society. MAIN OUTCOME MEASURES: Frequency of self-reported cheating/dishonest behaviors, understanding of appropriate relationships with industry as defined by American Medical Association policy, attitudes about physicians' responsibility to society, and the relationship of these dimensions of professionalism to burnout, symptoms of depression, and QOL. RESULTS: Of the students who responded to all the MBI items, 1354 of 2566 (52.8%) had burnout. Cheating/dishonest academic behaviors were rare (endorsed by <10%) in comparison to unprofessional conduct related to patient care (endorsed by up to 43%). Only 14% (362/2531) of students had opinions on relationships with industry consistent with guidelines for 6 scenarios. Students with burnout were more likely to report engaging in 1 or more unprofessional behaviors than those without burnout (35.0% vs 21.9%; odds ratio [OR], 1.89; 95% confidence interval [CI], 1.59-2.24). Students with burnout were also less likely to report holding altruistic views regarding physicians' responsibility to society. For example, students with burnout were less likely to want to provide care for the medically underserved than those without burnout (79.3% vs 85.0%; OR, 0.68; 95% CI, 0.55-0.83). After multivariable analysis adjusting for personal and professional characteristics, burnout was the only aspect of distress independently associated with reporting 1 or more unprofessional behaviors (OR, 1.76; 95% CI, 1.45-2.13) or holding at least 1 less altruistic view regarding physicians' responsibility to society (OR, 1.65; 95% CI, 1.35-2.01). CONCLUSION: Burnout was associated with self-reported unprofessional conduct and less altruistic professional values among medical students at 7 US schools.


Assuntos
Atitude do Pessoal de Saúde , Esgotamento Profissional , Depressão/psicologia , Médicos/ética , Má Conduta Profissional/psicologia , Estudantes de Medicina/psicologia , Adulto , Altruísmo , Estudos Transversais , Coleta de Dados , Feminino , Humanos , Masculino , Qualidade de Vida , Faculdades de Medicina , Responsabilidade Social , Estresse Psicológico , Estados Unidos , Adulto Jovem
19.
Med Educ ; 43(3): 274-82, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19250355

RESUMO

OBJECTIVES: Little is known about specific personal and professional factors influencing student distress. The authors conducted a comprehensive assessment of how learning environment, clinical rotation factors, workload, demographics and personal life events relate to student burnout. METHODS: All medical students (n = 3080) at five medical schools were surveyed in the spring of 2006 using a validated instrument to assess burnout. Students were also asked about the aforementioned factors. RESULTS: A total of 1701 medical students (response rate 55%) completed the survey. Learning climate factors were associated with student burnout on univariate analysis (odds ratio [OR] 1.36-2.07; all P < or = 0.02). Being on a hospital ward rotation or a rotation requiring overnight call was also associated with burnout (ORs 1.69 and 1.48, respectively; both P < or = 0.02). Other workload characteristics (e.g. number of admissions) had no relation to student burnout. Students who experienced a positive personal life event had a lower frequency of burnout (OR 0.70; P < or = 0.02), whereas those who experienced negative personal life events did not have a higher frequency of burnout than students who did not experience a negative personal life event. On multivariate analysis personal characteristics, learning environment and personal life events were all independently related to student burnout. CONCLUSIONS: Although a complex array of personal and professional factors influence student well-being, student satisfaction with specific characteristics of the learning environment appears to be a critical factor. Studies determining how to create a learning environment that cultivates student well-being are needed.


Assuntos
Esgotamento Profissional , Educação de Graduação em Medicina/métodos , Estudantes de Medicina/psicologia , Adulto , Currículo , Coleta de Dados , Feminino , Humanos , Acontecimentos que Mudam a Vida , Masculino , Análise Multivariada , Carga de Trabalho , Adulto Jovem
20.
Ann Intern Med ; 149(5): 334-41, 2008 Sep 02.
Artigo em Inglês | MEDLINE | ID: mdl-18765703

RESUMO

BACKGROUND: Little is known about the prevalence of suicidal ideation among U.S. medical students or how it relates to burnout. OBJECTIVE: To assess the frequency of suicidal ideation among medical students and explore its relationship with burnout. DESIGN: Cross-sectional 2007 and longitudinal 2006 to 2007 cohort study. SETTING: 7 medical schools in the United States. PARTICIPANTS: 4287 medical students at 7 medical schools, with students at 5 institutions studied longitudinally. MEASUREMENTS: Prevalence of suicidal ideation in the past year and its relationship to burnout, demographic characteristics, and quality of life. RESULTS: Burnout was reported by 49.6% (95% CI, 47.5% to 51.8%) of students, and 11.2% (CI, 9.9% to 12.6%) reported suicidal ideation within the past year. In a sensitivity analysis that assumed all nonresponders did not have suicidal ideation, the prevalence of suicidal ideation in the past 12 months would be 5.8%. In the longitudinal cohort, burnout (P < 0.001 for all domains), quality of life (P < 0.002 for each domain), and depressive symptoms (P < 0.001) at baseline predicted suicidal ideation over the following year. In multivariable analysis, burnout and low mental quality of life at baseline were independent predictors of suicidal ideation over the following year. Of the 370 students who met criteria for burnout in 2006, 99 (26.8%) recovered. Recovery from burnout was associated with markedly less suicidal ideation, which suggests that recovery from burnout decreased suicide risk. LIMITATION: Although response rates (52% for the cross-sectional study and 65% for the longitudinal cohort study) are typical of physician surveys, nonresponse by some students reduces the precision of the estimated frequency of suicidal ideation and burnout. CONCLUSION: Approximately 50% of students experience burnout and 10% experience suicidal ideation during medical school. Burnout seems to be associated with increased likelihood of subsequent suicidal ideation, whereas recovery from burnout is associated with less suicidal ideation.


Assuntos
Esgotamento Profissional/epidemiologia , Estudantes de Medicina/psicologia , Suicídio , Adulto , Esgotamento Profissional/prevenção & controle , Estudos Transversais , Depressão/epidemiologia , Feminino , Humanos , Estudos Longitudinais , Masculino , Prevalência , Qualidade de Vida , Estresse Psicológico/epidemiologia , Estados Unidos/epidemiologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA