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1.
J Child Psychol Psychiatry ; 65(1): 100-111, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37062713

RESUMO

BACKGROUND: To assess whether age of onset and duration of stimulant therapy for attention-deficit/hyperactivity disorder (ADHD) are associated with cocaine, methamphetamine, and prescription stimulant misuse during adolescence. METHODS: Nationally representative samples of US 10th and 12th grade students (N = 150,395) from the Monitoring the Future study were surveyed via self-administered questionnaires from 16 annual surveys (2005-2020). RESULTS: An estimated 8.2% of youth received stimulant therapy for ADHD during their lifetime (n = 10,937). More than one in 10 of all youth reported past-year prescription stimulant misuse (10.4%)-past-year cocaine (4.4%) and methamphetamine (2.0%) use were less prevalent. Youth who initiated early stimulant therapy for ADHD (≤9 years old) and for long duration (≥6 years) did not have significantly increased adjusted odds of cocaine or methamphetamine use relative to population controls (ie, non-ADHD and unmedicated ADHD youth). Youth who initiated late stimulant therapy for ADHD (≥10 years old) and for short duration (<1 year) had significantly higher odds of past-year cocaine or prescription stimulant misuse in adolescence than those initiating early stimulant therapy for ADHD (≤9 years old) and for long duration (≥6 years). Youth who initiated late stimulant therapy for ADHD (≥10 years) for short duration (<1 year) had significantly higher odds of past-year cocaine, methamphetamine, and prescription stimulant misuse versus population controls during adolescence. No differences in past-year cocaine, methamphetamine, and prescription stimulant misuse were found between individuals who only used non-stimulant therapy for ADHD relative to youth who initiated early stimulant therapy (≤9 years old) and for long duration (≥6 years). CONCLUSIONS: An inverse relationship was found between years of stimulant therapy and illicit and prescription stimulant misuse. Adolescents with later initiation and/or shorter duration of stimulant treatment for ADHD should be monitored for potential illicit and prescription stimulant misuse.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Estimulantes do Sistema Nervoso Central , Cocaína , Metanfetamina , Transtornos Relacionados ao Uso de Substâncias , Adolescente , Humanos , Criança , Metanfetamina/efeitos adversos , Transtorno do Deficit de Atenção com Hiperatividade/tratamento farmacológico , Transtorno do Deficit de Atenção com Hiperatividade/epidemiologia , Estimulantes do Sistema Nervoso Central/efeitos adversos , Idade de Início , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Cocaína/efeitos adversos , Prescrições de Medicamentos
2.
Luminescence ; 39(2): e4686, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38359905

RESUMO

Warm red-emitting praseodymium-doped LiSrVO4 phosphors were synthesized via solid-state reaction. The phase formation was verified using an X-ray diffraction study and the morphology was investigated using a scanning electron microscope study. The LiSrVO4 :Pr3+ phosphors emitted red light when exposed to ultraviolet light, indicating their possibility for use in warm white light-emitting diodes (WLEDs). Furthermore, the effect of charge compensators on the luminescence characteristics was addressed. The decay time was investigated using time-resolved photoluminescence. Furthermore, thermal quenching was analyzed through temperature-dependent photoluminescence spectra. Their sensitivity was calculated using temperature-dependent decay time analysis. The colour purity of the emitted light could be measured by photometric analysis. This comprehensive investigation provides a thorough understanding of the luminescence properties of phosphors for WLED applications.


Assuntos
Luminescência , Luz Vermelha , Difração de Raios X , Raios Ultravioleta , Temperatura
3.
Mol Ecol ; : e17244, 2023 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-38108560

RESUMO

Natural variation can provide important insights into the genetic and environmental factors that shape social behaviour and its evolution. The sweat bee, Lasioglossum baleicum, is a socially flexible bee capable of producing both solitary and eusocial nests. We demonstrate that within a single nesting aggregation, soil temperatures are a strong predictor of the social structure of nests. Sites with warmer temperatures in the spring have a higher frequency of social nests than cooler sites, perhaps because warmer temperatures provide a longer reproductive window for those nests. To identify the molecular correlates of this behavioural variation, we generated a de novo genome assembly for L. baleicum, and we used transcriptomic profiling to compare adults and developing offspring from eusocial and solitary nests. We find that adult, reproductive females have similar expression profiles regardless of social structure in the nest, but that there are strong differences between reproductive females and workers from social nests. We also find substantial differences in the transcriptomic profiles of stage-matched pupae from warmer, social-biased sites compared to cooler, solitary-biased sites. These transcriptional differences are strongly predictive of adult reproductive state, suggesting that the developmental environment may set the stage for adult behaviours in L. baleicum. Together, our results help to characterize the molecular mechanisms shaping variation in social behaviour and highlight a potential role of environmental tuning during development as a factor shaping adult behaviour and physiology in this socially flexible bee.

4.
Transfusion ; 63 Suppl 3: S146-S158, 2023 05.
Artigo em Inglês | MEDLINE | ID: mdl-37070399

RESUMO

BACKGROUND: Platelet concentrates (PLT) can be manufactured using a combination of apheresis collection devices and suspension media (plasma or platelet additive solution (PAS)). It is unclear how platelet quality and hemostatic function differ across the current in-use manufacturing methods in the United States. The objective of this study was therefore to compare baseline function of PLT collected using different apheresis collection platforms and storage media. STUDY DESIGN AND METHODS: PLT were collected at two sites with identical protocols (N = 5 per site, N = 10 total per group) on the MCS® + 9000 (Haemonetics; "MCS"), the Trima Accel® 7 (Terumo; "Trima"), and the Amicus Cell Separator (Fresenius Kabi, "Amicus"). MCS PLT were collected into plasma while Trima and Amicus PLT were collected into plasma or PAS (Trima into Isoplate and Amicus into InterSol; yielding groups "TP", "TI" and "AP", "AI", respectively). PLT units were sampled 1 h after collection and assayed to compare cellular counts, biochemistry, and hemostatic function. RESULTS: Differences in biochemistry were most evident between plasma and PAS groups, as anticipated. MCS and TP had the highest clot strength as assessed by viscoelastometry. AI had the lowest thrombin generation capacity. Both TP and TI had the highest responses on platelet aggregometry. AI had the greatest number of microparticles. DISCUSSION: Platelet quality and function differ among collection platforms at baseline. MCS and Trima platelets overall appear to trend toward higher hemostatic function. Future investigations will assess how these differences change throughout storage, and if these in vitro measures are clinically relevant.


Assuntos
Plaquetas , Hemostáticos , Humanos , Plaquetoferese/métodos , Separação Celular , Contagem de Células
5.
Int J Behav Nutr Phys Act ; 19(1): 141, 2022 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-36451168

RESUMO

BACKGROUND: Whole-of-school programs have demonstrated success in improving student physical activity levels, but few have progressed beyond efficacy testing to implementation at-scale. The purpose of our study was to evaluate the scale-up of the 'Internet-based Professional Learning to help teachers promote Activity in Youth' (iPLAY) intervention in primary schools using the RE-AIM framework. METHODS: We conducted a type 3 hybrid implementation-effectiveness study and collected data between April 2016 and June 2021, in New South Wales (NSW), Australia. RE-AIM was operationalised as: (i) Reach: Number and representativeness of students exposed to iPLAY; (ii) Effectiveness: Impact of iPLAY in a sub-sample of students (n = 5,959); (iii) Adoption: Number and representativeness of schools that received iPLAY; (iv) Implementation: Extent to which the three curricular and three non-curricular components of iPLAY were delivered as intended; (v) Maintenance: Extent to which iPLAY was sustained in schools. We conducted 43 semi-structured interviews with teachers (n = 14), leaders (n = 19), and principals (n = 10) from 18 schools (11 from urban and 7 from rural locations) to determine program maintenance. RESULTS: Reach: iPLAY reached ~ 31,000 students from a variety of socio-economic strata (35% of students were in the bottom quartile, almost half in the middle two quartiles, and 20% in the top quartile). EFFECTIVENESS: We observed small positive intervention effects for enjoyment of PE/sport (0.12 units, 95% CI: 0.05 to 0.20, d = 0.17), perceptions of need support from teachers (0.26 units, 95% CI: 0.16 to 0.53, d = 0.40), physical activity participation (0.28 units, 95% CI: 0.10 to 0.47, d = 0.14), and subjective well-being (0.82 units, 95% CI: 0.32 to 1.32, d = 0.12) at 24-months. Adoption: 115 schools received iPLAY. IMPLEMENTATION: Most schools implemented the curricular (59%) and non-curricular (55%) strategies as intended. Maintenance: Based on our qualitative data, changes in teacher practices and school culture resulting from iPLAY were sustained. CONCLUSIONS: iPLAY had extensive reach and adoption in NSW primary schools. Most of the schools implemented iPLAY as intended and effectiveness data suggest the positive effects observed in our cluster RCT were sustained when the intervention was delivered at-scale. TRIAL REGISTRATION: ACTRN12621001132831.


Assuntos
Internet , Instituições Acadêmicas , Humanos , Adolescente , Estudantes , Coleta de Dados , Prazer
6.
Issues Ment Health Nurs ; 43(8): 755-765, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35358004

RESUMO

Previous research has found that major depressive disorder (MDD) commonly occurs in hypothyroid populations. The purpose of this study was to use the biopsychosocial model to investigate factors associated with MDD and hypothyroidism by comparing hypothyroid patients with MDD and without MDD. A sample of 386 participants with hypothyroidism completed both cognitive and psychosocial self-reported assessments along with a questionnaire rating the severity of common hypothyroid symptoms. Participants were divided into two groups (MDD and no MDD) using the diagnostic criteria of the Patient Health Questionnaire. Univariate comparisons were used to assess differences in the severity of physical, psychological, and social correlates in participants with and without MDD. Participants with MDD reported significantly worse symptom severity, increased stress, and disruptions of cognitive functioning. Compared to individuals without MDD, they also indicated poorer quality of life, doctor-patient relationships, and treatment adherence. Individuals with comorbid depression and hypothyroidism reported worse outcomes across physical symptoms, social factors, and psychological and cognitive states than individuals without MDD. Integrating depression screeners and independent treatment for MDD, in addition to the patient's hypothyroid treatment plan, may result in hypothyroid symptom relief and greater quality of life.


Assuntos
Transtorno Depressivo Maior , Hipotireoidismo , Transtorno Depressivo Maior/complicações , Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/epidemiologia , Humanos , Hipotireoidismo/complicações , Qualidade de Vida/psicologia , Autorrelato , Índice de Gravidade de Doença
7.
Ultrasound Obstet Gynecol ; 57(4): 614-623, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-32196791

RESUMO

OBJECTIVE: To construct international ultrasound-based standards for fetal cerebellar growth and Sylvian fissure maturation. METHODS: Healthy, well nourished pregnant women, enrolled at < 14 weeks' gestation in the Fetal Growth Longitudinal Study (FGLS) of INTERGROWTH-21st , an international multicenter, population-based project, underwent serial three-dimensional (3D) fetal ultrasound scans every 5 ± 1 weeks until delivery in study sites located in Brazil, India, Italy, Kenya and the UK. In the present analysis, only those fetuses that underwent developmental assessment at 2 years of age were included. We measured the transcerebellar diameter and assessed Sylvian fissure maturation using two-dimensional ultrasound images extracted from available 3D fetal head volumes. The appropriateness of pooling data from the five sites was assessed using variance component analysis and standardized site differences. For each Sylvian fissure maturation score (left or right side), mean gestational age and 95% CI were calculated. Transcerebellar diameter was modeled using fractional polynomial regression, and goodness of fit was assessed. RESULTS: Of those children in the original FGLS cohort who had developmental assessment at 2 years of age, 1130 also had an available 3D ultrasound fetal head volume. The sociodemographic characteristics and pregnancy/perinatal outcomes of the study sample confirmed the health and low-risk status of the population studied. In addition, the fetuses had low morbidity and adequate growth and development at 2 years of age. In total, 3016 and 2359 individual volumes were available for transcerebellar-diameter and Sylvian-fissure analysis, respectively. Variance component analysis and standardized site differences showed that the five study populations were sufficiently similar on the basis of predefined criteria for the data to be pooled to produce international standards. A second-degree fractional polynomial provided the best fit for modeling transcerebellar diameter; we then estimated gestational-age-specific 3rd , 50th and 97th smoothed centiles. Goodness-of-fit analysis comparing empirical centiles with smoothed centile curves showed good agreement. The Sylvian fissure increased in maturation with advancing gestation, with complete overlap of the mean gestational age and 95% CIs between the sexes for each development score. No differences in Sylvian fissure maturation between the right and left hemispheres were observed. CONCLUSION: We present, for the first time, international standards for fetal cerebellar growth and Sylvian fissure maturation throughout pregnancy based on a healthy fetal population that exhibited adequate growth and development at 2 years of age. © 2020 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.


Assuntos
Cerebelo/embriologia , Aqueduto do Mesencéfalo/embriologia , Desenvolvimento Fetal , Gráficos de Crescimento , Ultrassonografia Pré-Natal , Adulto , Brasil , Cerebelo/crescimento & desenvolvimento , Aqueduto do Mesencéfalo/crescimento & desenvolvimento , Pré-Escolar , Feminino , Idade Gestacional , Humanos , Índia , Lactente , Recém-Nascido , Itália , Quênia , Estudos Longitudinais , Masculino , Gravidez , Resultado da Gravidez , Padrões de Referência , Reino Unido
8.
Int J Mol Sci ; 22(1)2021 Jan 05.
Artigo em Inglês | MEDLINE | ID: mdl-33466228

RESUMO

Atrial fibrillation (AF) is the most common age-related cardiac arrhythmia worldwide and is associated with ischemic stroke, heart failure, and substantial morbidity and mortality. Unfortunately, current AF therapy is only moderately effective and does not prevent AF progression from recurrent intermittent episodes (paroxysmal) to persistent and finally permanent AF. It has been recognized that AF persistence is related to the presence of electropathology. Electropathology is defined as structural damage, including degradation of sarcomere structures, in the atrial tissue which, in turn, impairs electrical conduction and subsequently the contractile function of atrial cardiomyocytes. Recent research findings indicate that derailed proteostasis underlies structural damage and, consequently, electrical conduction impairment. A healthy proteostasis is of vital importance for proper function of cells, including cardiomyocytes. Cells respond to a loss of proteostatic control by inducing a heat shock response (HSR), which results in heat shock protein (HSP) expression. Emerging clinical evidence indicates that AF-induced proteostasis derailment is rooted in exhaustion of HSPs. Cardiomyocytes lose defense against structural damage-inducing pathways, which drives progression of AF and induction of HSP expression. In particular, small HSPB1 conserves sarcomere structures by preventing their degradation by proteases, and overexpression of HSPB1 accelerates recovery from structural damage in experimental AF model systems. In this review, we provide an overview of the mechanisms of action of HSPs in preventing AF and discuss the therapeutic potential of HSP-inducing compounds in clinical AF, as well as the potential of HSPs as biomarkers to discriminate between the various stages of AF and recurrence of AF after treatment.


Assuntos
Fibrilação Atrial/metabolismo , Proteínas de Choque Térmico/metabolismo , Animais , Átrios do Coração/metabolismo , Resposta ao Choque Térmico/fisiologia , Humanos , Contração Miocárdica/fisiologia , Miócitos Cardíacos/metabolismo , Proteostase/fisiologia
9.
Ultrasound Obstet Gynecol ; 56(3): 359-370, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32048426

RESUMO

OBJECTIVE: To create prescriptive growth standards for five fetal brain structures, measured using ultrasound, in healthy, well-nourished women at low risk of impaired fetal growth and poor perinatal outcome, taking part in the Fetal Growth Longitudinal Study (FGLS) of the INTERGROWTH-21st Project. METHODS: This was a complementary analysis of a large, population-based, multicenter, longitudinal study. The sample analyzed was selected randomly from the overall FGLS population, ensuring an equal distribution among the eight diverse participating sites and of three-dimensional (3D) ultrasound volumes across pregnancy (range: 15-36 weeks' gestation). We measured, in planes reconstructed from 3D ultrasound volumes of the fetal head at different timepoints in pregnancy, the size of the parieto-occipital fissure (POF), Sylvian fissure (SF), anterior horn of the lateral ventricle, atrium of the posterior horn of the lateral ventricle (PV) and cisterna magna (CM). Fractional polynomials were used to construct the standards. Growth and development of the infants were assessed at 1 and 2 years of age to confirm their adequacy for constructing international standards. RESULTS: From the entire FGLS cohort of 4321 women, 451 (10.4%) were selected at random. After exclusions, 3D ultrasound volumes from 442 fetuses born without a congenital malformation were used to create the charts. The fetal brain structures of interest were identified in 90% of cases. All structures, except the PV, showed increasing size with gestational age, and the size of the POF, SF, PV and CM showed increasing variability. The 3rd , 5th , 50th , 95th and 97th smoothed centiles are presented. The 5th centiles for the POF and SF were 3.1 mm and 4.7 mm at 22 weeks' gestation and 4.6 mm and 9.9 mm at 32 weeks, respectively. The 95th centiles for the PV and CM were 8.5 mm and 7.5 mm at 22 weeks and 8.6 mm and 9.5 mm at 32 weeks, respectively. CONCLUSIONS: We have produced prescriptive size standards for fetal brain structures based on prospectively enrolled pregnancies at low risk of abnormal outcome. We recommend these as international standards for the assessment of measurements obtained using ultrasound from fetal brain structures. © 2020 Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.


Assuntos
Encéfalo/diagnóstico por imagem , Ultrassonografia Pré-Natal , Adulto , Encéfalo/crescimento & desenvolvimento , Cefalometria , Feminino , Desenvolvimento Fetal , Idade Gestacional , Saúde Global , Humanos , Estudos Longitudinais , Gravidez , Valores de Referência
10.
Stud Fam Plann ; 51(4): 343-360, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-33336831

RESUMO

Reproductive coercion (RC), or partner interference in reproductive decisions, limits women's autonomy. Little is known about RC behaviors and measurement in low- and middle-income countries (LMICs). In this mixed-methods study, we examined the transferability of the US-developed RC Scale to the Kenyan context. Through community-based sampling, recent intimate partner violence (IPV) survivors were recruited from Nairobi's informal settlements. We conducted quantitative analyses (n = 327) to assess the transferability of RC measures via exploratory factor analysis and used descriptive statistics to examine prevalence and continuous metrics. We conducted in-depth interviews (IDIs; n = 30) to contextualize results. Psychometric analyses indicated a two-factor solution comprising pregnancy coercion and condom manipulation (alpha = 0.86). Eighty-two percent of IPV survivors reported experiencing RC (pregnancy coercion = 76.6 percent; condom manipulation = 59.5 percent). IDIs highlighted women's multiple, severe RC experiences; experiences described in IDIs were largely consistent with quantitative findings. We found the RC Scale was transferable to this LMIC context, where IPV survivors face prevalent, severe RC and would benefit from linkage to woman-centered support services.


Assuntos
Coerção , Violência por Parceiro Íntimo , Autonomia Pessoal , Comportamento Reprodutivo , Adulto , Preservativos , Feminino , Humanos , Quênia , Gravidez , Prevalência , Sobreviventes
11.
BMC Public Health ; 20(1): 808, 2020 May 29.
Artigo em Inglês | MEDLINE | ID: mdl-32471469

RESUMO

BACKGROUND: Intimate partner violence (IPV) is a leading threat to women's health and safety globally. Women in abusive relationships make critical decisions about safety and harm reduction while weighing multiple competing priorities, such as safety of children, housing and employment. In many low- and middle-income countries (LMIC), IPV prevention and response services are limited and women lack access to safety planning resources. In high-resource settings, an interactive safety decision aid app (myPlan) has been found valuable in reducing decisional conflict and empowering women to take action in accordance with their safety priorities. This paper describes 1) the community-participatory formative process used to adapt the myPlan app content, interface, and implementation for the Kenya context, and 2) the randomized clinical trial study protocol for efficacy evaluation of myPlan Kenya. METHODS: A community-participatory formative process engaged service providers and stakeholders, as well as IPV survivors for adaptation, followed by an in-depth pilot and final refinements. A randomized clinical trial design will then be used to determine efficacy of the myPlan Kenya app compared to standard care among women reporting IPV or fear of partner and living in an urban settlement. myPlan Kenya app provides and solicits information on a) relationship health; b) safety priorities; and c) severity of relationship violence. Based on the woman's inputs, the evidence-based algorithm developed for myPlan Kenya generates a tailored safety plan. Outcome measures are assessed at baseline, immediate post-intervention, and 3-month post-baseline. Difference-in-differences analysis compares primary (e.g. safety preparedness, safety behavior, IPV), and secondary outcomes (e.g. resilience, mental health, service utilization, self-blame) across timepoints by group. DISCUSSION: Formative phase revealed high feasibility and acceptability of a technology-based intervention for safety planning in this LMIC setting. This phase generated essential refinements to myPlan Kenya app readability, content and implementation, including increased visualization of messaging, and implementation via community health volunteers (CHVs). The resulting trial will be the first to evaluate efficacy of a community-partnered technology-based IPV intervention in a LMIC. Our adaptation process and trial results will inform researchers and interventionists to integrate multiple data sources to adapt IPV intervention content and interface in settings where technology-based interventions for IPV are novel and literacy is limited. TRIAL REGISTRATION: Pan African Clinical Trial Registry approval received 25 April 2018 (PACTR201804003321122); retrospectively registered.


Assuntos
Técnicas de Apoio para a Decisão , Países em Desenvolvimento/estatística & dados numéricos , Violência por Parceiro Íntimo/prevenção & controle , Violência por Parceiro Íntimo/estatística & dados numéricos , Aplicativos Móveis , Gestão da Segurança/métodos , Gestão da Segurança/estatística & dados numéricos , Adolescente , Adulto , Feminino , Humanos , Quênia , Adulto Jovem
12.
J Pharmacol Exp Ther ; 371(1): 63-74, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31371480

RESUMO

Sphingosine kinase [(SK), isoforms SK1 and SK2] catalyzes the formation of the bioactive lipid, sphingosine 1-phosphate (S1P). This can be exported from cells and bind to S1P receptors to modulate vascular function. We investigated the effect of short-term hypoxia on SK1 expression and the response of arteries to S1P. SK1 expression in rat aortic and coronary artery endothelial cells was studied using immunofluorescence and confocal microscopy. Responses of rat aortic rings were studied using wire myography and reversible hypoxia induced by bubbling myography chambers with 95% N2:5% CO2 Inhibitors were added 30 minutes before induction of hypoxia. S1P induced endothelium-dependent vasodilation via activation of S1P3 receptors and generation of nitric oxide. Hypoxia significantly increased relaxation to S1P and this was attenuated by (2R)-1-[[(4-[[3-methyl-5-[(phenylsulfonyl)methyl] phenoxy]methyl]phenyl]methyl]-2-pyrrolidinemethanol [(PF-543), SK1 inhibitor] but not (R)-FTY720 methyl ether [(ROMe), SK2 inhibitor]. Hypoxia also increased vessel contractility to the thromboxane mimetic, 9,11-dideoxy-11α,9α-epoxymethanoprostaglandin F2α, which was further increased by PF-543 and ROMe. Hypoxia upregulated SK1 expression in aortic and coronary artery endothelial cells and this was blocked by PF-543 and 2-(p-hydroxyanilino)-4-(p-chlorophenyl)thiazole [(SKi), SK1/2 inhibitor]. The effects of PF-543 and SKi were associated with increased proteasomal/lysosomal degradation of SK1. A short period of hypoxia increases the expression of SK1, which may generate S1P to oppose vessel contraction. Under hypoxic conditions, upregulation of SK1 is likely to lead to increased export of S1P from the cell and vasodilation via activation of endothelial S1P3 receptors. These data have significance for perfusion of tissue during episodes of ischemia.


Assuntos
Hipóxia/metabolismo , Lisofosfolipídeos/farmacologia , Fosfotransferases (Aceptor do Grupo Álcool)/metabolismo , Receptores de Esfingosina-1-Fosfato/metabolismo , Esfingosina/análogos & derivados , Vasodilatação , Animais , Aorta/efeitos dos fármacos , Aorta/metabolismo , Aorta/fisiologia , Vasos Coronários/efeitos dos fármacos , Vasos Coronários/metabolismo , Vasos Coronários/fisiopatologia , Hipóxia/fisiopatologia , Masculino , Fosfotransferases (Aceptor do Grupo Álcool)/antagonistas & inibidores , Fosfotransferases (Aceptor do Grupo Álcool)/genética , Proteólise , Ratos , Ratos Sprague-Dawley , Esfingosina/farmacologia , Regulação para Cima
13.
Osteoarthritis Cartilage ; 27(9): 1347-1360, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31132406

RESUMO

OBJECTIVES: Wnt pathway upregulation contributes to knee osteoarthritis (OA) through osteoblast differentiation, increased catabolic enzymes, and inflammation. The small-molecule Wnt pathway inhibitor, lorecivivint (SM04690), which previously demonstrated chondrogenesis and cartilage protection in an animal OA model, was evaluated to elucidate its mechanism of action. DESIGN: Biochemical assays measured kinase activity. Western blots measured protein phosphorylation in human mesenchymal stem cells (hMSCs), chondrocytes, and synovial fibroblasts. siRNA knockdown effects in hMSCs and BEAS-2B cells on Wnt pathway, chondrogenic genes, and LPS-induced inflammatory cytokines was measured by qPCR. In vivo anti-inflammation, pain, and function were evaluated following single intra-articular (IA) lorecivivint or vehicle injection in the monosodium iodoacetate (MIA)-induced rat OA model. RESULTS: Lorecivivint inhibited intranuclear kinases CDC-like kinase 2 (CLK2) and dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A). Lorecivivint inhibited CLK2-mediated phosphorylation of serine/arginine-rich (SR) splicing factors and DYRK1A-mediated phosphorylation of SIRT1 and FOXO1. siRNA knockdowns identified a role for CLK2 and DYRK1A in Wnt pathway modulation without affecting ß-catenin with CLK2 inhibition inducing early chondrogenesis and DYRK1A inhibition enhancing mature chondrocyte function. NF-κB and STAT3 inhibition by lorecivivint reduced inflammation. DYRK1A knockdown was sufficient for anti-inflammatory effects, while combined DYRK1A/CLK2 knockdown enhanced this effect. In the MIA model, lorecivivint inhibited production of inflammatory cytokines and cartilage degradative enzymes, resulting in increased joint cartilage, decreased pain, and improved weight-bearing function. CONCLUSIONS: Lorecivivint inhibition of CLK2 and DYRK1A suggested a novel mechanism for Wnt pathway inhibition, enhancing chondrogenesis, chondrocyte function, and anti-inflammation. Lorecivivint shows potential to modify structure and improve symptoms of knee OA.


Assuntos
Anti-Inflamatórios/uso terapêutico , Imidazóis/uso terapêutico , Indazóis/uso terapêutico , Osteoartrite do Joelho/tratamento farmacológico , Proteínas Serina-Treonina Quinases/antagonistas & inibidores , Proteínas Tirosina Quinases/antagonistas & inibidores , Piridinas/uso terapêutico , Via de Sinalização Wnt/efeitos dos fármacos , Animais , Western Blotting , Células Cultivadas , Modelos Animais de Doenças , Humanos , Reação em Cadeia da Polimerase , Ratos , Quinases Dyrk
14.
BJOG ; 126 Suppl 4: 34-42, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31257668

RESUMO

OBJECTIVES: A diagnosis of hypertensive disorders during pregnancy (HDPs) or gestational diabetes mellitus (GDM) is highly predictive of women at increased risk of developing chronic hypertension, Type 2 diabetes, and cardiovascular disease. This study investigates perceptions of women and healthcare providers in rural India regarding these long-term risks. DESIGN: Qualitative study using modified grounded theory. SETTING: Two states in rural India: Haryana and Andhra Pradesh. POPULATION: Pregnant and postpartum women, community health workers (CHWs), primary care physicians, obstetricians, laboratory technicians, and healthcare officials. METHODS: In-depth interviews and focus group discussions explored: (1) priorities for high-risk pregnant women; (2) detection and management of HDPs and GDM; (3) postpartum management, and (4) knowledge of long-term sequelae of high-risk conditions. A thematic analysis was undertaken. RESULTS: Seven focus group discussions and 11 in-depth interviews (n = 71 participants) were performed. The key priority area for high-risk pregnant women was anaemia. Blood pressure measurement was routinely embedded in antenatal care; however, postpartum follow up and knowledge of the long-term complications were limited. GDM was not considered a common problem, although significant variations and challenges to GDM screening were identified. Knowledge of the long-term sequelae of GDM with regard to an increased risk of Type 2 diabetes and cardiovascular disease among doctors was minimal. CONCLUSIONS: There is a need for improved education, standardisation of testing and postpartum follow up of HDPs and GDM in rural Indian settings. FUNDING: SN is supported by an MRC Clinical Research Training Fellowship (MR/R017182/1). The George Institute for Global Health Global Women's Health programme provided financial support for the research assistant and fieldwork costs in India. TWEETABLE ABSTRACT: Improved education and postpartum care of women with hypertension and diabetes in pregnancy in rural India are needed to prevent long-term risks.


Assuntos
Atitude do Pessoal de Saúde , Diabetes Gestacional/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Pré-Eclâmpsia/psicologia , Adulto , Idoso , Anemia/psicologia , Feminino , Grupos Focais , Teoria Fundamentada , Humanos , Índia , Masculino , Pessoa de Meia-Idade , Cuidado Pós-Natal , Gravidez , Pesquisa Qualitativa , População Rural/estatística & dados numéricos , Saúde da Mulher
15.
Int J Mol Sci ; 20(12)2019 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-31242551

RESUMO

Infants born to diabetic or obese mothers are at greater risk of heart disease at birth and throughout life, but prevention is hindered because underlying mechanisms remain poorly understood. Using a rat model, we showed that prenatal exposure to maternal diabetes and a high-fat diet caused diastolic and systolic dysfunction, myocardial lipid accumulation, decreased respiratory capacity, and oxidative stress in newborn offspring hearts. This study aimed to determine whether mitochondrial dynamism played a role. Using confocal live-cell imaging, we examined mitochondrial dynamics in neonatal rat cardiomyocytes (NRCM) from four prenatally exposed groups: controls, diabetes, high-fat diet, and combination exposed. Cardiac expression of dynamism-related genes and proteins were compared, and gender-specific differences were evaluated. Findings show that normal NRCM have highly dynamic mitochondria with a well-balanced number of fusion and fission events. Prenatal exposure to diabetes or a high-fat diet impaired dynamism resulting in shorter, wider mitochondria. Mechanisms of impaired dynamism were gender-specific and protein regulated. Females had higher expression of fusion proteins which may confer a cardioprotective effect. Prenatally exposed male hearts had post-translational modifications known to impair dynamism and influence mitophagy-mediated cell death. This study identifies mitochondrial fusion and fission proteins as targetable, pathogenic regulators of heart health in offspring exposed to excess circulating maternal fuels.


Assuntos
Dieta Hiperlipídica/efeitos adversos , Desenvolvimento Fetal , Coração/embriologia , Dinâmica Mitocondrial , Organogênese , Gravidez em Diabéticas , Animais , Animais Recém-Nascidos , Biomarcadores , Feminino , Desenvolvimento Fetal/genética , Imunofluorescência , Regulação da Expressão Gênica , Masculino , Mitocôndrias Cardíacas/genética , Mitocôndrias Cardíacas/metabolismo , Mitocôndrias Cardíacas/ultraestrutura , Dinâmica Mitocondrial/genética , Proteínas Mitocondriais/genética , Proteínas Mitocondriais/metabolismo , Miócitos Cardíacos/metabolismo , Organogênese/genética , Gravidez , Processamento de Proteína Pós-Traducional , Ratos , Fatores Sexuais
16.
Pharmacogenomics J ; 18(3): 406-412, 2018 05 22.
Artigo em Inglês | MEDLINE | ID: mdl-28696415

RESUMO

We investigated variants associated with treatment response in depressed patients treated with either the antidepressant duloxetine or placebo using a genome-wide approach. Our sample (N=391) included individuals aged 18-75 years, diagnosed with major depressive disorder and treated with either duloxetine or placebo for up to 8 weeks. We conducted genome-wide associations for treatment response as operationalized by percentage change in Montgomery-Åsberg Depression Rating Scale score from baseline, as well as mixed models analyses across five time points. In the placebo-treated subsample (N=205), we observed a genome-wide association with rs76767803 (ß=0.69, P=1.25 × 10-8) upstream of STAC1. STAC1 rs76767803 was also associated with response using mixed model analysis (χ2=3.95; P=0.001). In the duloxetine-treated subsample (N=186), we observed suggestive associations with ZNF385D (rs4261893; ß=-0.46, P=1.55 × 10-5), NCAM1 (rs2303377; ß=0.45, P=1.76 × 10-5) and MLL5 (rs117986340; ß=0.91, P=3.04 × 10-5). Our findings suggest that a variant upstream of STAC1 is associated with placebo response, which might have implications for treatment optimization, clinical trial design and drug development.


Assuntos
Proteínas de Ligação a DNA/genética , Transtorno Depressivo Maior/tratamento farmacológico , Estudo de Associação Genômica Ampla , Proteínas do Tecido Nervoso/genética , Adolescente , Adulto , Idoso , Antidepressivos/administração & dosagem , Antidepressivos/efeitos adversos , Antígeno CD56/genética , Transtorno Depressivo Maior/genética , Transtorno Depressivo Maior/patologia , Método Duplo-Cego , Cloridrato de Duloxetina/administração & dosagem , Cloridrato de Duloxetina/efeitos adversos , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Placebos , Fatores de Transcrição/genética , Adulto Jovem
17.
BJOG ; 125(9): 1145-1153, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28029221

RESUMO

OBJECTIVES: To identify risk factors for antepartum stillbirth, including fetal growth restriction, among women with well-dated pregnancies and access to antenatal care. DESIGN: Population-based, prospective, observational study. SETTING: Eight international urban populations. POPULATION: Pregnant women and their babies enrolled in the Newborn Cross-Sectional Study of the INTERGROWTH-21st Project. METHODS: Cox proportional hazard models were used to compare risks among antepartum stillborn and liveborn babies. MAIN OUTCOME MEASURES: Antepartum stillbirth was defined as any fetal death after 16 weeks' gestation before the onset of labour. RESULTS: Of 60 121 babies, 553 were stillborn (9.2 per 1000 births), of which 445 were antepartum deaths (7.4 per 1000 births). After adjustment for site, risk factors were low socio-economic status, hazard ratio (HR): 1.6 (95% CI, 1.2-2.1); single marital status, HR 2.0 (95% CI, 1.4-2.8); age ≥40 years, HR 2.2 (95% CI, 1.4-3.7); essential hypertension, HR 4.0 (95% CI, 2.7-5.9); HIV/AIDS, HR 4.3 (95% CI, 2.0-9.1); pre-eclampsia, HR 1.6 (95% CI, 1.1-3.8); multiple pregnancy, HR 3.3 (95% CI, 2.0-5.6); and antepartum haemorrhage, HR 3.3 (95% CI, 2.5-4.5). Birth weight <3rd centile was associated with antepartum stillbirth [HR, 4.6 (95% CI, 3.4-6.2)]. The greatest risk was seen in babies not suspected to have been growth restricted antenatally, with an HR of 5.0 (95% CI, 3.6-7.0). The population-attributable risk of antepartum death associated with small-for-gestational-age neonates diagnosed at birth was 11%. CONCLUSIONS: Antepartum stillbirth is a complex syndrome associated with several risk factors. Although small babies are at higher risk, current growth restriction detection strategies only modestly reduced the rate of stillbirth. TWEETABLE ABSTRACT: International stillbirth study finds individual risks poor predictors of death but combinations promising.


Assuntos
Natimorto/epidemiologia , Estudos Transversais , Feminino , Retardo do Crescimento Fetal/epidemiologia , Retardo do Crescimento Fetal/etiologia , Peso Fetal , Idade Gestacional , Humanos , Recém-Nascido , Gravidez , Modelos de Riscos Proporcionais , Estudos Prospectivos , Fatores de Risco , Síndrome
18.
Ultrasound Obstet Gynecol ; 52(4): 430-441, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29920817

RESUMO

OBJECTIVE: The cerebroplacental ratio (CPR) has been proposed for the routine surveillance of pregnancies with suspected fetal growth restriction (FGR), but the predictive performance of this test is unclear. The aim of this study was to determine the accuracy of CPR for predicting adverse perinatal and neurodevelopmental outcomes in suspected FGR. METHODS: PubMed, EMBASE, CINAHL and Lilacs were searched from inception to 31 July 2017 for cohort or cross-sectional studies reporting on the accuracy of CPR for predicting adverse perinatal and/or neurodevelopmental outcomes in singleton pregnancies with FGR suspected antenatally based on sonographic parameters. Summary receiver-operating characteristics (ROC) curves, pooled sensitivities and specificities, and summary likelihood ratios (LRs) were generated. RESULTS: Twenty-two studies (including 4301 women) met the inclusion criteria. Summary ROC curves showed that the best predictive accuracy of CPR was for perinatal death and the worst was for neonatal acidosis, with areas under the summary ROC curves of 0.83 and 0.57, respectively. The predictive accuracy of CPR was moderate to high for perinatal death (pooled sensitivity and specificity of 93% and 76%, respectively, and summary positive and negative LRs of 3.9 and 0.09, respectively) and low for composite of adverse perinatal outcomes, Cesarean section for non-reassuring fetal status, 5-min Apgar score < 7, admission to the neonatal intensive care unit, neonatal acidosis and neonatal morbidity, with summary positive and negative LRs ranging from 1.1 to 2.5 and 0.3 to 0.9, respectively. An abnormal CPR result had moderate accuracy for predicting small-for-gestational age at birth (summary positive LR of 7.4). CPR had a higher predictive accuracy in pregnancies with suspected early-onset FGR. No study provided data for assessing the predictive accuracy of CPR for adverse neurodevelopmental outcome. CONCLUSION: CPR appears to be useful in predicting perinatal death in pregnancies with suspected FGR. Nevertheless, before incorporating CPR into the routine clinical management of suspected FGR, randomized controlled trials should assess whether the use of CPR reduces perinatal death or other adverse perinatal outcomes. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.


Assuntos
Desenvolvimento Infantil/fisiologia , Deficiências do Desenvolvimento/fisiopatologia , Retardo do Crescimento Fetal/diagnóstico por imagem , Artéria Cerebral Média/diagnóstico por imagem , Placenta/diagnóstico por imagem , Ultrassonografia Pré-Natal , Artérias Umbilicais/diagnóstico por imagem , Feminino , Retardo do Crescimento Fetal/fisiopatologia , Humanos , Recém-Nascido , Artéria Cerebral Média/embriologia , Artéria Cerebral Média/fisiopatologia , Placenta/irrigação sanguínea , Valor Preditivo dos Testes , Gravidez , Fluxo Pulsátil/fisiologia , Padrões de Referência , Artérias Umbilicais/fisiopatologia
19.
Br J Anaesth ; 120(6): 1304-1314, 2018 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29793597

RESUMO

BACKGROUND: Persistent post-surgical pain affects 10-80% of individuals after common operations, and is more common among patients with psychological factors such as depression, anxiety, or catastrophising. METHODS: We conducted a systematic review and meta-analysis of randomised, controlled trials to evaluate the efficacy of perioperative psychotherapy for persistent post-surgical pain and physical impairment. Paired independent reviewers identified studies, extracted data, and assessed risk of bias. The Grading of Recommendations, Assessment, Development and Evaluation system was used to assess the quality of evidence. RESULTS: Our search of five electronic databases, up to September 1, 2016, found 15 trials (2220 patients) that were eligible for review. For both persistent post-surgical pain and physical impairment, perioperative education was ineffective, while active psychotherapy suggested a benefit (test of interaction P=0.01 for both outcomes). Moderate quality evidence showed that active perioperative psychotherapy (cognitive-behaviour therapy, relaxation therapy, or both) significantly reduced persistent post-surgical pain [weighted mean difference (WMD) -1.06 cm on a 10 cm visual analogue scale for pain, 95% confidence interval (CI) -1.56 to -0.55 cm; risk difference (RD) for achieving no more than mild pain (≤3 cm) 14%, 95% CI 8-21%] and physical impairment [WMD -9.87% on the 0-100% Oswestry Disability Index, 95% CI -13.42 to -6.32%, RD for achieving no more than mild disability (≤20%) 21%, 95% CI 13-29%]. CONCLUSIONS: Perioperative cognitive behavioural therapy and relaxation therapy are effective for reducing persistent pain and physical impairment after surgery. Future studies should explore targeted psychotherapy for surgical patients at higher risk for poor outcome. CLINICAL TRIAL REGISTRATION: PROSPERO CRD42016047335.


Assuntos
Dor Crônica/terapia , Dor Pós-Operatória/terapia , Assistência Perioperatória/métodos , Psicoterapia/métodos , Terapia Cognitivo-Comportamental/métodos , Humanos , Manejo da Dor/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto , Terapia de Relaxamento/métodos
20.
Age Ageing ; 47(1): 149-155, 2018 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-29206906

RESUMO

Background: Comprehensive Geriatric Assessment (CGA) is now the accepted gold standard for caring for frail older people in hospital. However, there is uncertainty about identifying and targeting suitable recipients and which patients benefit the most. Objectives: our objectives were to describe the key elements, principal measures of outcome and the characteristics of the main beneficiaries of inpatient CGA. Methods: we used the Joanna Briggs Institute umbrella review method. We searched for systematic reviews and meta-analyses describing CGA services for hospital inpatients in the Cochrane Database of Systematic Reviews, Database of Reviews of Effectiveness (DARE), MEDLINE and EMBASE and a range of other sources. Results: we screened 1,010 titles and evaluated 419 abstracts for eligibility, 143 full articles for relevance and included 24 in a final quality and relevance check. Thirteen reviews, reported in 15 papers, were selected for review. The most widely used definition of CGA was: 'a multidimensional, multidisciplinary process which identifies medical, social and functional needs, and the development of an integrated/co-ordinated care plan to meet those needs'. Key clinical outcomes included mortality, activities of daily living and dependency. The main beneficiaries were people ≥55 years in receipt of acute care. Frailty in CGA recipients and patient related outcomes were not usually reported. Conclusions: we confirm a widely used definition of CGA. Key outcomes are death, disability and institutionalisation. The main beneficiaries in hospital are older people with acute illness. The presence of frailty has not been widely examined as a determinant of CGA outcome.


Assuntos
Prestação Integrada de Cuidados de Saúde/métodos , Fragilidade/terapia , Avaliação Geriátrica/métodos , Geriatria/métodos , Admissão do Paciente , Fatores Etários , Idoso , Prestação Integrada de Cuidados de Saúde/classificação , Feminino , Idoso Fragilizado , Fragilidade/diagnóstico , Fragilidade/fisiopatologia , Fragilidade/psicologia , Avaliação Geriátrica/classificação , Geriatria/classificação , Humanos , Vida Independente , Masculino , Pessoa de Meia-Idade , Equipe de Assistência ao Paciente , Participação Social , Terminologia como Assunto
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