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1.
AJNR Am J Neuroradiol ; 44(9): 999-1001, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37536735

RESUMO

Benign enhancing foramen magnum lesions have been previously described as T2-hyperintense small, enhancing lesions located posterior to the intradural vertebral artery. We present the first case with pathologic correlation. These lesions are fibrotic nodules adhering to the spinal accessory nerve. While they can enlarge with time on subsequent examinations, on the basis of the imaging characteristics and location, they do not necessitate surgical resection.


Assuntos
Forame Magno , Artéria Vertebral , Humanos , Forame Magno/diagnóstico por imagem
2.
Phys Rev Lett ; 130(25): 251901, 2023 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-37418716

RESUMO

We present measurements of the cross section and double-helicity asymmetry A_{LL} of direct-photon production in p[over →]+p[over →] collisions at sqrt[s]=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at sqrt[s]=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02

Assuntos
Alimentos , Fótons , Movimento (Física)
3.
Climacteric ; 26(3): 222-228, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-36847215

RESUMO

Abnormal uterine bleeding is a common reason for presentation to health-care providers: it is estimated that one woman in three will present to a care provider with abnormal uterine bleeding (AUB) during the reproductive years, and that at least one woman in 10 will experience postmenopausal bleeding. Although there are some variations in national guidelines for investigation, diagnosis and management of premenopausal AUB, there are far more areas of agreement than disagreement. A comprehensive literature search was undertaken to review national and international guidelines regarding investigation, diagnosis and management of AUB in both premenopausal and postmenopausal women. Areas of controversy are identified, and latest evidence reviewed. Although efforts to reduce hysterectomies for premenopausal AUB through medical management have largely been successful, there are areas where more research is necessary to guide optimal investigation and management. Many countries have well-defined guidelines for investigation and management of premenopausal AUB: there are fewer well-developed guidelines for investigation and management of postmenopausal bleeding. There is a paucity of evidence-based data on management of unscheduled bleeding on menopausal hormone therapy.


Assuntos
Pós-Menopausa , Doenças Uterinas , Feminino , Humanos , Hemorragia Uterina/diagnóstico , Hemorragia Uterina/etiologia , Hemorragia Uterina/terapia , Menopausa , Pré-Menopausa
4.
Am J Physiol Regul Integr Comp Physiol ; 324(3): R305-R316, 2023 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-36622086

RESUMO

Vagal preganglionic neurons innervate myenteric ganglia. These autonomic efferents are distributed so densely within the ganglia that it has been impractical to track individual vagal axons through the myenteric plexus with tracer labeling. To evaluate whether vagal efferent axons evidence selectivity, particularly for nitrergic or non-nitrergic myenteric neurons within the plexus, we limited the numbers and volumes of brainstem dextran biotin tracer injections per animal. Reduced labeling and the use of immunohistochemistry generated cases in which some individual axons could be distinguished and traced in three dimensions (Neurolucida) within and among successive (up to 46) myenteric ganglia. In the myenteric plexus of all stomach regions, the majority (∼86%) of vagal efferents were organized into two distinct subtypes. One subtype (∼24% of dextran-labeled efferents, designated "primarily nitrergic") selectively contacted and linked-both within and between ganglia-nitric oxide synthase positive (nNOS+) neurons into presumptive motor modules. A second subtype (∼62% of efferents, designated "primarily non-nitrergic") appeared to selectively contact and link-both within and between ganglia-non-nitrergic enteric neurons into a second type of effector ensemble. A third candidate type (∼14% of labeled preganglionics), appeared to lack "nitrergic selectivity" and to contact both nNOS+ and nNOS- enteric neurons. In addition to the quantitative assessment of the efferent axons in stomach, qualitative observations of the proximal duodenum indicated similar selective vagal efferent projections, in proportions comparable with those evaluated in the stomach. Limited injections of tracer, three-dimensional (3-D) tracing of individual axons, and histochemistry of myenteric neurons might distinguish additional efferent phenotypes.NEW & NOTEWORTHY The present study highlights the following: 1) one type of vagal efferent axon selectively innervates nitrergic upper gastrointestinal myenteric neurons; 2) a second type of vagal efferent selectively innervates non-nitrergic gastrointestinal myenteric neurons; and 3) the two types of vagal efferents might modulate peristalsis reciprocally and cooperatively.


Assuntos
Dextranos , Plexo Mientérico , Animais , Plexo Mientérico/fisiologia , Nervo Vago/fisiologia , Axônios , Neurônios
5.
J Neurol ; 270(2): 632-641, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35849153

RESUMO

OBJECTIVES: To compare acute nystagmus characteristics of posterior circulation stroke (PCS) and acute vestibular neuritis (AVN) in the emergency room (ER) within 24 h of presentation. METHODS: ER-based video-nystagmography (VNG) was conducted, recording ictal nystagmus in 101 patients with PCS (on imaging) and 104 patients with AVN, diagnosed on accepted clinical and vestibular test criteria. RESULTS: Patients with stroke in the brainstem (38/101, affecting midbrain (n = 7), pons (n = 19), and medulla (n = 12)), cerebellum (31/101), both (15/101) or other locations (17/101) were recruited. Common PCS territories included posterior-inferior-cerebellar-artery (41/101), pontine perforators (18/101), multiple-territories (17/101) and anterior-inferior-cerebellar-artery (7/101). In PCS, 44/101 patients had no spontaneous nystagmus. Remaining PCS patients had primary position horizontal (44/101), vertical (8/101) and torsional (5/101) nystagmus. Horizontal nystagmus was 50% ipsiversive and 50% contraversive in lateralised PCS. Most PCS patients with horizontal nystagmus (28/44) had unidirectional "peripheral-appearing" nystagmus. 32/101 of PCS patients had gaze-evoked nystagmus. AVN affected the superior, inferior or both divisions of the vestibular nerve in 55/104, 4/104 and 45/104. Most (102/104) had primary position horizontal nystagmus; none had gaze-evoked nystagmus. Two inferior VN patients had contraversive torsional-downbeat nystagmus. Horizontal nystagmus with SPV ≥ 5.8 °/s separated AVN from PCS with sensitivity and specificity of 91.2% and 83.0%. Absent nystagmus, gaze-evoked nystagmus, and vertical-torsional nystagmus were highly specific for PCS (100%, 100% and 98.1%). CONCLUSION: Nystagmus is often absent in PCS and always present in AVN. Unidirectional 'peripheral-appearing' horizontal nystagmus can be seen in PCS. ER-based VNG nystagmus assessment could provide useful diagnostic information when separating PCS from AVN.


Assuntos
Nistagmo Patológico , Neuronite Vestibular , Humanos , Neuronite Vestibular/complicações , Neuronite Vestibular/diagnóstico , Nistagmo Patológico/diagnóstico , Nistagmo Patológico/etiologia , Nervo Vestibular , Ponte , Serviço Hospitalar de Emergência
6.
Ther Adv Musculoskelet Dis ; 14: 1759720X221081652, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35844267

RESUMO

Introduction: Post hoc analyses of osteoporosis trials have suggested that alendronate and strontium ranelate may be associated with a reduction in the progression of spinal radiographic osteoarthritis (OA). We performed an analysis on a subgroup of participants in the horizon PFT trial (a 3-year randomized controlled trial (RCT) of yearly zoledronic acid (ZA) in postmenopausal women with osteoporosis), to evaluate the effect of ZA on the structural progression of spinal osteophytes (OPh) and disk space narrowing (DN). Methods: Paired lateral spinal X-rays (baseline and 36 months) were selected from the horizon PFT trial records restricted to those with radiographic OA at baseline. The X-rays were analyzed by two readers blinded to the treatment allocation. OPh and DN were scored separately using the Lane atlas (0-3 for increasing severity at each vertebral level) at all evaluable levels from T4-12 and L1-5. Results: A total of 504 sets of paired radiographs were included in the analysis, 245 in the ZA group and 259 in the placebo group. Overall, the rates of change of OPh and DN scores were low, and they were not statistically different between the groups (change in the whole spine OPh ZA 1.0 ± 1.6, placebo 0.8 ± 1.3, p = 0.1; DN ZA 0.3 ± 1.0, placebo 0.3 ± 0.8, p = 0.7). Conclusion: Yearly ZA for 3 years was not associated with a slowing of progression of OPh or DN in the thoracolumbar spine in patients with pre-existing radiographic OA.

7.
Biomed J ; 45(5): 776-787, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34666219

RESUMO

INTRODUCTION: Organs procured following brain stem death (BSD) are the main source of organ grafts for transplantation. However, BSD is associated with inflammatory responses that may damage the organ and affect both the quantity and quality of organs available for transplant. Therefore, we aimed to investigate plasma and bronchoalveolar lavage (BAL) pro-inflammatory cytokine profiles and cardiovascular physiology in a clinically relevant 6-h ovine model of BSD. METHODS: Twelve healthy female sheep (37-42 Kg) were anaesthetized and mechanically ventilated prior to undergoing BSD induction and then monitored for 6 h. Plasma and BAL endothelin-1 and cytokines (IL-1ß, 6, 8 and tumour necrosis factor alpha (TNF-α)) were assessed by ELISA. Differential white blood cell counts were performed. Cardiac function during BSD was also examined using echocardiography, and cardiac biomarkers (A-type natriuretic peptide and troponin I were measured in plasma. RESULTS: Plasma concentrations big ET-1, IL-6, IL-8, TNF-α and BAL IL-8 were significantly (p < 0.01) increased over baseline at 6 h post-BSD. Increased numbers of neutrophils were observed in the whole blood (3.1 × 109 cells/L [95% confidence interval (CI) 2.06-4.14] vs. 6 × 109 cells/L [95%CI 3.92-7.97]; p < 0.01) and BAL (4.5 × 109 cells/L [95%CI 0.41-9.41] vs. 26 [95%CI 12.29-39.80]; p = 0.03) after 6 h of BSD induction vs baseline. A significant increase in ANP production (20.28 pM [95%CI 16.18-24.37] vs. 78.68 pM [95%CI 53.16-104.21]; p < 0.0001) and cTnI release (0.039 ng/mL vs. 4.26 [95%CI 2.69-5.83] ng/mL; p < 0.0001), associated with a significant reduction in heart contractile function, were observed between baseline and 6 h. CONCLUSIONS: BSD induced systemic pro-inflammatory responses, characterized by increased neutrophil infiltration and cytokine production in the circulation and BAL fluid, and associated with reduced heart contractile function in ovine model of BSD.


Assuntos
Cardiopatias , Fator de Necrose Tumoral alfa , Ovinos , Animais , Feminino , Fator de Necrose Tumoral alfa/metabolismo , Interleucina-8 , Citocinas/metabolismo , Tronco Encefálico
8.
Int J Tuberc Lung Dis ; 25(7): 560-566, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-34183101

RESUMO

BACKGROUND: Progress towards TB elimination in the United States will require improved detection and treatment of latent TB infection among non-U.S.-born residents who remain at disproportionate risk of TB disease. To inform targeted testing efforts, we evaluated risk of TB disease among non-U.S.-born residents of Washington State, USA, by region of origin and time from U.S. entry.METHODS: We conducted a retrospective cohort study among non-U.S.-born residents diagnosed with TB disease in Washington State from 2005 to 2014, for which country-specific population estimates were also available. The risk of TB disease among non-U.S.-born residents was estimated by time since U.S. entry, World Bank region of origin, and WHO TB incidence category.RESULTS: Risk of TB disease for non-U.S.-born residents was highest within the first year after U.S. entry. Among persons from countries with high TB incidence who had resided in the United States for more than 20 years, risk for TB remained elevated.CONCLUSION: Elevated risk of developing TB disease among individuals not born in the United States persisted long after U.S. entry, particularly among persons originating from certain regions and from high-burden countries. These findings contribute to evidence supporting a refinement of existing screening guidelines.


Assuntos
Emigrantes e Imigrantes , Tuberculose , Emigração e Imigração , Humanos , Incidência , Estudos Retrospectivos , Tuberculose/diagnóstico , Tuberculose/epidemiologia , Estados Unidos/epidemiologia , Washington/epidemiologia
9.
Osteoporos Int ; 32(6): 1217-1219, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33903925

RESUMO

In patients with surgical repair of a low-trauma hip fracture, zoledronic acid (ZA) reduced the risk of subsequent fractures regardless of pretreatment femoral neck and total hip bone mineral density (BMD). INTRODUCTION: Zoledronic acid reduces the risk of subsequent fractures after repair of a hip fracture. It is still unclear whether the benefits in fracture reduction with ZA depend upon hip bone mineral density at the time of fracture. METHODS: We preformed additional post hoc analyses of data from the HORIZON Recurrent Fracture Trial to determine if ZA treatment reduced the risk of new clinical fractures regardless of pretreatment BMD. We modeled femoral neck and total hip BMD as both continuous and dichotomous variables (BMD T-score above and below -2.5). RESULTS: There are no evidence that baseline femoral neck and total hip BMD modified the anti-fracture efficacy of ZA when pretreatment BMD was analyzed as a continuous or a dichotomous variable (interaction p-values > 0.20). The clinical fracture efficacy of ZA was similar among patients with pretreatment femoral neck BMD values above and below -2.5 (relative hazards = 0.60 and 0.67, respectively, interaction p-value = 0.95). A similar result was obtained using pretreatment total hip BMD values (relative hazards = 0.72 and 0.57, respectively, interaction p-value = 0.41). CONCLUSION: There data should provide more comfort in prescribing ZA after surgical repair of a hip fracture, regardless of pretreatment BMD.


Assuntos
Conservadores da Densidade Óssea , Fraturas do Quadril , Densidade Óssea , Conservadores da Densidade Óssea/uso terapêutico , Colo do Fêmur/cirurgia , Fraturas do Quadril/prevenção & controle , Fraturas do Quadril/cirurgia , Humanos , Ácido Zoledrônico/uso terapêutico
10.
J Biomed Sci ; 27(1): 96, 2020 Oct 02.
Artigo em Inglês | MEDLINE | ID: mdl-33008372

RESUMO

BACKGROUND: A lung transplant is the last resort treatment for many patients with advanced lung disease. The majority of donated lungs come from donors following brain death (BD). The endothelin axis is upregulated in the blood and lung of the donor after BD resulting in systemic inflammation, lung damage and poor lung graft outcomes in the recipient. Tezosentan (endothelin receptor blocker) improves the pulmonary haemodynamic profile; however, it induces adverse effects on other organs at high doses. Application of ex vivo lung perfusion (EVLP) allows the development of organ-specific hormone resuscitation, to maximise and optimise the donor pool. Therefore, we investigate whether the combination of EVLP and tezosentan administration could improve the quality of donor lungs in a clinically relevant 6-h ovine model of brain stem death (BSD). METHODS: After 6 h of BSD, lungs obtained from 12 sheep were divided into two groups, control and tezosentan-treated group, and cannulated for EVLP. The lungs were monitored for 6 h and lung perfusate and tissue samples were processed and analysed. Blood gas variables were measured in perfusate samples as well as total proteins and pro-inflammatory biomarkers, IL-6 and IL-8. Lung tissues were collected at the end of EVLP experiments for histology analysis and wet-dry weight ratio (a measure of oedema). RESULTS: Our results showed a significant improvement in gas exchange [elevated partial pressure of oxygen (P = 0.02) and reduced partial pressure of carbon dioxide (P = 0.03)] in tezosentan-treated lungs compared to controls. However, the lungs hematoxylin-eosin staining histology results showed minimum lung injuries and there was no difference between both control and tezosentan-treated lungs. Similarly, IL-6 and IL-8 levels in lung perfusate showed no difference between control and tezosentan-treated lungs throughout the EVLP. Histological and tissue analysis showed a non-significant reduction in wet/dry weight ratio in tezosentan-treated lung tissues (P = 0.09) when compared to control. CONCLUSIONS: These data indicate that administration of tezosentan could improve pulmonary gas exchange during EVLP.


Assuntos
Antagonistas dos Receptores de Endotelina/farmacologia , Pulmão/efeitos dos fármacos , Piridinas/farmacologia , Testes de Função Respiratória , Tetrazóis/farmacologia , Vasodilatadores/farmacologia , Animais , Modelos Animais de Doenças , Pulmão/fisiologia , Perfusão , Carneiro Doméstico , Doadores de Tecidos
11.
Breast Cancer Res Treat ; 184(2): 459-467, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-32812177

RESUMO

BACKGROUND: Breast lymphoedema can occur following surgical treatment for breast cancer. We investigated whether an exercise program reduced breast lymphoedema symptoms compared to a non-exercise control group. METHODS: A single-blinded randomised controlled trial was conducted in which women with stable breast lymphoedema (n = 89) were randomised into an exercise (n = 41) or control (n = 47) group. The intervention comprised a 12-week combined aerobic and resistance training program, supervised weekly by an accredited exercise physiologist. All participants completed a weekly symptoms diary and were assessed monthly to ensure that there was no exacerbation of their lymphoedema. Changes in the breast were captured physically with ultrasound and bioimpedance spectroscopy and changes in symptoms were captured using European Organization for Research and Treatment of Cancer (EORTC) Breast Cancer (BR23) and Lymphoedema Symptom Intensity and Distress questionnaires. RESULTS: The exercise group reported a greater reduction in breast-related symptoms than the control group, assessed by the EORTC BR23 breast symptom questions. Measures of extracellular fluid, assessed with bioimpedance spectroscopy ratio, decreased in the exercise group compared to the control group. No significant difference was detected in dermal thickness in the breast, assessed by ultrasound. Session attendance in the exercise sessions was high, with two musculoskeletal adverse events reported, but no exacerbations of lymphoedema observed. CONCLUSION: Combined resistance and aerobic exercise training is safe for women living with breast lymphoedema. Preliminary data suggest exercise training can reduce breast lymphoedema symptoms to a greater extent than usual care.


Assuntos
Neoplasias da Mama , Linfedema , Treinamento Resistido , Neoplasias da Mama/complicações , Exercício Físico , Terapia por Exercício , Feminino , Humanos , Linfedema/diagnóstico , Linfedema/etiologia , Linfedema/terapia
12.
Osteoporos Int ; 31(9): 1741-1747, 2020 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-32361951

RESUMO

This study evaluated whether zoledronic acid (ZA) inhibited the progression of abdominal aortic calcification (AAC) over 3 years in 502 postmenopausal women with osteoporosis. AAC progressed in a similar proportion of participants in the ZA (29%) and placebo (31%) groups, suggesting no effect of ZA on AAC progression. INTRODUCTION: Bisphosphonate use is associated with reduced risk of all-cause mortality and cardiovascular events. The underlying mechanisms are uncertain but may include effects on vascular calcification. This study aimed to evaluate the effect of zoledronic acid (ZA) on abdominal aortic calcification (AAC) in postmenopausal women with osteoporosis. METHODS: This was a post hoc analysis of the HORIZON Pivotal Fracture Trial that included 502 postmenopausal women (mean age 72.5 years) with osteoporosis (234 received ZA and 268 placebo). AAC scores (range, 0-8) were assessed from paired spine X-rays at baseline and after 3 years. Progression of AAC was defined as any increase in AAC score. The association between change in hip and femoral neck bone mineral density and change in AAC score was also assessed. RESULTS: At baseline, 292 (58.2%) participants had AAC (i.e., AAC score > 0), with AAC scores similar in the two intervention groups (median [interquartile range], 1 [0 to 2] for both; p = 0.98). Over 3 years, AAC progressed in a similar proportion of participants in both groups (ZA 29% and placebo 31%; p = 0.64). Change in bone mineral density and change in AAC score were not correlated. CONCLUSION: Once-yearly zoledronic acid did not affect progression of AAC over 3 years in postmenopausal women with osteoporosis. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT00049829.


Assuntos
Conservadores da Densidade Óssea , Osteoporose Pós-Menopausa , Osteoporose , Idoso , Densidade Óssea , Conservadores da Densidade Óssea/uso terapêutico , Difosfonatos/uso terapêutico , Feminino , Humanos , Osteoporose Pós-Menopausa/tratamento farmacológico , Pós-Menopausa , Ácido Zoledrônico/uso terapêutico
13.
Support Care Cancer ; 28(7): 3073-3080, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31641870

RESUMO

INTRODUCTION: In the absence of monitoring programs, those at risk of developing breast cancer-related lymphoedema (BCRL) must detect its development. However, the efficacy of self-assessment for BCRL has not been widely investigated. This study will determine if symptoms and signs of BCRL are associated with lymphoedema detected by bioimpedance spectroscopy (BIS) and whether those with and without BCRL can accurately assess the signs of its presence. METHODS AND RESULTS: Participants with a history of breast cancer (n = 100) reported the presence/absence of symptoms associated with upper limb BCRL and underwent assessment for pitting oedema and differences in tissue texture between their arms (pinch). BIS detected BCRL in 48 women. Women were more likely to have BIS-detected BCRL if they reported swelling (odds ratio (OR), 58.8; 95% CI, 4.9 to 709.4; p = 0.001) or had inter-limb tissue texture differences in their forearm (OR, 73.5; 95% CI, 7.3 to 736.9; p = < 0.001) or upper arm (OR, 23.9; 95% CI, 2.8 to 201.7; p = 0.003). Agreement between therapist and self-assessment of signs of BCRL was almost perfect (kappa, 0.819 to 0.940). A combination of self-reported swelling and/or self-assessed forearm tissue texture difference identified all cases of BIS-detected BCRL. CONCLUSION: Participants accurately identified the presence or absence of physical signs of BCRL in their arm. Perceived swelling and differences in tissue texture in the affected arm were associated with, and sensitive to, BIS-detected BCRL. These findings support the use of self-assessment to determine if BCRL is developing, indicating the need for professional assessment.


Assuntos
Linfedema Relacionado a Câncer de Mama/diagnóstico , Autoavaliação (Psicologia) , Adulto , Idoso , Idoso de 80 Anos ou mais , Braço/patologia , Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Detecção Precoce de Câncer , Feminino , Humanos , Pessoa de Meia-Idade , Autorrelato
14.
J Proteome Res ; 18(10): 3780-3791, 2019 10 04.
Artigo em Inglês | MEDLINE | ID: mdl-31483676

RESUMO

This work addresses the question of how the Ca2+ sensor protein calmodulin shapes cellular responses to Ca2+ signals. Proteins interacting with affinity tagged calmodulin were captured by rapid (t1/2 ≈ 7 s) photoactivated cross-linking under basal conditions, after brief removal of extracellular Ca2+ and during a cytosolic [Ca2+] transient in cells metabolically labeled with a photoreactive methionine analog. Tagged adducts were stringently enriched, and captured proteins were identified and quantified by LC-MS/MS. A set of 489 proteins including 27 known calmodulin interactors was derived. A threshold for fractional capture was applied to define a high specificity group of 170 proteins, including 22 known interactors, and a low specificity group of 319 proteins. Capture of ∼60% of the high specificity group was affected by manipulations of Ca2+, compared with ∼20% of the low specificity group. This suggests that the former is likely to contain novel interactors of physiological significance. The capture of 29 proteins, nearly all high specificity, was decreased by the removal of extracellular Ca2+, although this does not affect cytosolic [Ca2+]. Capture of half of these was unaffected by the cytosolic [Ca2+] transient, consistent with high local [Ca2+]. These proteins are hypothesized to reside in or near microdomains of high [Ca2+] supported by the Ca2+ influx.


Assuntos
Calmodulina/metabolismo , Células/metabolismo , Reagentes de Ligações Cruzadas/efeitos da radiação , Metionina/metabolismo , Proteínas/metabolismo , Cálcio/metabolismo , Sinalização do Cálcio , Células/química , Células Cultivadas , Cromatografia Líquida , Humanos , Ligação Proteica , Espectrometria de Massas em Tandem
15.
Osteoporos Int ; 30(6): 1287-1295, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-30809724

RESUMO

The paper focuses on the identification of atypical fractures (AFFs). This paper examines the concordance between objective classification and expert subjective review. We believe the paper adds critical information about how to apply the American Society of Bone and Mineral Research (ASBMR) criteria to diagnose AFFs and is of high interest to the field. INTRODUCTION: Assess American Society of Bone and Mineral Research (ASBMR) criteria for identifying atypical femoral fractures (AFFs). METHODS: Two orthopedic surgeons independently evaluated radiographs of 372 fractures, applying ASBMR criteria. We assessed ease of applying ASBMR criteria and whether criteria-based assessment matched qualitative expert assessment. RESULTS: There was up to 27% uncertainty about how to classify specific features. 84% of films were classified similarly for the presence of AFF according to ASBMR criteria; agreement increased to 94% after consensus meeting. Of 37 fractures categorized as AFFs based on ASBMR criteria, 23 (62.2%) were considered AFFs according to expert assessment (not relying on criteria). Only one (0.5%) femoral shaft fracture that did not meet ASBMR criteria was considered an AFF per expert assessment. The number of major ASBMR features present (four vs five) and whether there was periosteal or endosteal thickening ("beaking" or "flaring") played major roles in the discrepancies between ASBMR criteria-based and expert-based determinations. CONCLUSIONS: ASBMR AFF criteria were useful for reviewers but several features were difficult to interpret. Expert assessments did not agree with the ASBMR classification in almost one-third of cases, but rarely identified an AFF when a femoral shaft fracture did not meet ASBMR AFF criteria. Experts identified lateral cortical transverse fracture line and associated new-bone formation along with no or minimal comminution as crucial features necessary for the definition of atypical femoral fractures.


Assuntos
Fraturas do Fêmur/diagnóstico por imagem , Comitês Consultivos , Idoso , Conservadores da Densidade Óssea/efeitos adversos , Competência Clínica , Difosfonatos/efeitos adversos , Registros Eletrônicos de Saúde , Prova Pericial , Feminino , Fraturas do Fêmur/induzido quimicamente , Humanos , Masculino , Pessoa de Meia-Idade , Variações Dependentes do Observador , Radiografia
16.
Osteoporos Int ; 30(3): 667-673, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30635696

RESUMO

Early PINP changes correlate with 18-month lumbar spine BMD changes and the correlation was greater with abaloparatide versus teriparatide. The uncoupling index was similar between the two agents. INTRODUCTION: We evaluated the relationship between early PINP changes and subsequent changes in spine BMD following abaloparatide and teriparatide treatments. We also explored the use of an "uncoupling index" (UI), the balance between bone formation and bone resorption, which we hypothesised would be similar in response to these treatment groups. METHODS: Blood samples were taken for measurement of bone turnover markers (BTMs) s-PINP and s-CTX at baseline, 1, 3, 6, 12, and 18 months from 189 abaloparatide patients and 227 teriparatide patients randomly selected from all participants who completed the study. BMD was measured by DXA at baseline, 6, 12, and 18 months. Correlations were calculated between log ratio of BTMs from baseline to 3 months and percent change from baseline in BMD at 18 months. A UI was calculated using log transformation and subtraction of the standard deviate for s-CTX from the standard deviate for s-PINP for each patient. RESULTS: Early BTM changes were associated with subsequent BMD changes for both treatments. Pearson correlations for the log ratio of PINP over baseline at 3 months and BMD percent change from baseline at 18 months were larger (P < 0.0001) with abaloparatide (r = 0.561) than teriparatide (r = 0.198). The mean UI at 1 month was greater for abaloparatide versus teriparatide (1.743 and 1.493, respectively; P = 0.03) but was similar at 3 months or later time points. CONCLUSIONS: Early s-PINP changes correlate with percentage change in lumbar spine BMD 18 months after treatment with both abaloparatide and teriparatide, though the correlation with abaloparatide was greater. The UI was similar between abaloparatide and teriparatide suggesting that the balance between formation and resorption markers was similar.


Assuntos
Conservadores da Densidade Óssea/farmacologia , Remodelação Óssea/efeitos dos fármacos , Osteoporose Pós-Menopausa/fisiopatologia , Proteína Relacionada ao Hormônio Paratireóideo/farmacologia , Teriparatida/farmacologia , Idoso , Biomarcadores/sangue , Densidade Óssea/efeitos dos fármacos , Densidade Óssea/fisiologia , Conservadores da Densidade Óssea/uso terapêutico , Remodelação Óssea/fisiologia , Colágeno Tipo I/sangue , Método Duplo-Cego , Feminino , Humanos , Vértebras Lombares/fisiopatologia , Pessoa de Meia-Idade , Osteoporose Pós-Menopausa/sangue , Osteoporose Pós-Menopausa/tratamento farmacológico , Proteína Relacionada ao Hormônio Paratireóideo/uso terapêutico , Fragmentos de Peptídeos/sangue , Peptídeos/sangue , Pró-Colágeno/sangue , Teriparatida/uso terapêutico
17.
Phys Occup Ther Pediatr ; 39(4): 404-419, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30648457

RESUMO

Aims: To examine changes in upper limb function, and performance in everyday tasks, for children with unilateral cerebral palsy who participated in a magic-themed hand-arm bimanual intensive therapy (HABIT). Methods: Twenty-eight children participated; mean age 10 y 6 mo (SD 2 y 2 mo), n = 15 male and n = 13 female. Using a single group, pre-and post-test design, the magic-themed HABIT was delivered for 60 hours over 10 days. Bimanual and unimanual hand function were measured using the Assisting Hand Assessment (AHA) and Box and Blocks Test (BBT). Occupational performance was rated using the Canadian Occupational Performance Measure (COPM). Two parent questionnaires explored change in bimanual hand use in everyday activities; ABILHAND-Kids and Children's Hand-use Experience Questionnaire (CHEQ). Assessments were completed pre-, immediately post, 3 months and 6 months after the intervention. Results: Friedman's ANOVA revealed a significant improvement for COPM and CHEQ grasp subscale. Repeated measures ANOVA revealed a significant improvement in BBT, and ABILHAND-Kids, and no significant change for AHA. Conclusions: Children who participated in the magic-themed HABIT experienced improved occupational performance, unimanual skills, and parent ratings of performance in challenging everyday tasks.


Assuntos
Paralisia Cerebral/fisiopatologia , Paralisia Cerebral/reabilitação , Extremidade Superior/fisiopatologia , Atividades Cotidianas , Adolescente , Criança , Avaliação da Deficiência , Feminino , Humanos , Magia , Masculino , Jogos e Brinquedos
18.
J Public Health (Oxf) ; 41(2): e121-e132, 2019 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-30137569

RESUMO

BACKGROUND: The built environment exerts one of the strongest directly measurable effects on physical and mental health, yet the evidence base underpinning the design of healthy urban planning is not fully developed. METHOD: This study provides a systematic review of quantitative studies assessing the impact of buildings on health. In total, 7127 studies were identified from a structured search of eight databases combined with manual searching for grey literature. Only quantitative studies conducted between January 2000 and November 2016 were eligible for inclusion. Studies were assessed using the quality assessment tool for quantitative studies. RESULTS: In total, 39 studies were included in this review. Findings showed consistently that housing refurbishment and modifications, provision of adequate heating, improvements to ventilation and water supply were associated with improved respiratory outcomes, quality of life and mental health. Prioritization of housing for vulnerable groups led to improved wellbeing. However, the quality of the underpinning evidence and lack of methodological rigour in most of the studies makes it difficult to draw causal links. CONCLUSION: This review identified evidence to demonstrate the strong association between certain features of housing and wellbeing such as adequate heating and ventilation. Our findings highlight the need for strengthening of the evidence base in order for meaningful conclusions to be drawn.


Assuntos
Ambiente Construído , Saúde , Habitação , Humanos
19.
Ann Surg Oncol ; 26(3): 815-820, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30556120

RESUMO

BACKGROUND: OncotypeDX recurrence score (RS)® has been found to predict recurrence and disease-free survival in patients with node negative breast cancer. Whether RS is useful in guiding locoregional therapy decisions is unclear. We sought to evaluate the relationship between RS and lymph node burden. METHODS: Patients with invasive breast cancer who underwent sentinel lymph node dissection from 2010 to 2015 were identified from a prospectively maintained database. Patients were excluded if they were clinically node positive or if they received neoadjuvant chemotherapy. RS was classified as low (< 18), intermediate (18-30), or high (> 30). The association between RS, lymph node burden, and disease recurrence was evaluated. Statistical analyses were performed in R version 3.4.0; p < 0.05 was considered significant. RESULTS: A positive SLN was found in 168 (15%) of 1121 patients. Completion axillary lymph node dissection was performed in 84 (50%) of SLN-positive patients. The remaining 84 (50%) patients had one to two positive SLNs and did not undergo further axillary surgery. RS was low in 58.5%, intermediate in 32.6%, and high in 8.9%. RS was not associated with a positive SLN, number of positive nodes, maximum node metastasis size, or extranodal extension. The median follow-up was 23 months. High RS was not associated with locoregional recurrence (p = 0.07) but was significantly associated with distant recurrence (p = 0.0015). CONCLUSIONS: OncotypeDX RS is not associated with nodal burden in women with clinically node-negative breast cancer, suggesting that RS is not useful to guide decisions regarding extent of axillary surgery for these patients.


Assuntos
Biomarcadores Tumorais/genética , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/secundário , Testes Genéticos/métodos , Recidiva Local de Neoplasia/patologia , Linfonodo Sentinela/patologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/genética , Neoplasias da Mama/cirurgia , Carcinoma Ductal de Mama/genética , Carcinoma Ductal de Mama/cirurgia , Feminino , Seguimentos , Perfilação da Expressão Gênica , Humanos , Metástase Linfática , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/genética , Recidiva Local de Neoplasia/cirurgia , Prognóstico , Estudos Prospectivos , Estudos Retrospectivos , Linfonodo Sentinela/metabolismo , Linfonodo Sentinela/cirurgia , Biópsia de Linfonodo Sentinela
20.
J R Coll Physicians Edinb ; 48(4): 341-345, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30488893

RESUMO

BACKGROUND: The Joint Royal Colleges of Physicians Training Board (JRCPTB) on behalf of the Federation of the three Royal Colleges of Physicians started a process of implementing UK-equivalent Core Medical Training internationally in 2014. An accreditation process was developed to ensure that training standards were at least equivalent to the current position in the UK and that a developmental process was embedded to ensure long-term program viability. METHODS: This paper describes developing the appropriate standards, the types of accreditation being offered and the process of a full accreditation visit. RESULTS: The outcomes and learning from the first three accreditation visits, two visits to Iceland and the first to Kochi in Kerala, India, are described. Significant improvement over time has been demonstrated in Iceland as well as very high standards of training in Kerala. CONCLUSIONS: The accreditation process is providing early evidence that UK-equivalent Core Medical Training can be delivered successfully in different international contexts. The findings emphasise the importance of externality as part of effective governance. Partners need to be carefully chosen with a high degree of commitment to the process of both implementation and ongoing development. Longer term evaluation will need to consider other dimensions, such as exam results, and trainee and trainer satisfaction.


Assuntos
Acreditação/métodos , Educação de Pós-Graduação em Medicina/normas , Faculdades de Medicina/normas , Currículo , Humanos , Islândia , Índia , Reino Unido
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