RESUMO
Despite extensive studies into severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the effect of maternal infection on the neonate is unclear. To investigate this, we characterized the immunology of neonates born to mothers with confirmed SARS-CoV-2 infection during pregnancy. Here we show that maternal SARS-CoV-2 infection affects the neonatal immune system. Despite similar proportions of B cells, CD4+ T cells and CD8+ T cells, increased percentages of natural killer cells, Vδ2+ γδ T cells and regulatory T cells were detected in neonates born to mothers with recent or ongoing infection compared with those born to recovered or uninfected mothers. Increased plasma cytokine levels were also evident in neonates and mothers within the recent or ongoing infection group. Cytokine functionality was enhanced in neonates born to SARS-CoV-2-exposed mothers, compared to those born to uninfected mothers. In most neonates, this immune imprinting was nonspecific, suggesting vertical transmission of SARS-CoV-2 is limited, a finding supported by a lack of SARS-CoV-2-specific IgM in neonates despite maternal IgG transfer.
Assuntos
COVID-19/imunologia , Doenças do Recém-Nascido/imunologia , Transmissão Vertical de Doenças Infecciosas , Complicações Infecciosas na Gravidez/imunologia , SARS-CoV-2/imunologia , Adulto , Anticorpos Antivirais/imunologia , COVID-19/diagnóstico , COVID-19/virologia , Citocinas/sangue , Citocinas/imunologia , Citocinas/metabolismo , Feminino , Humanos , Imunidade Inata/imunologia , Imunoglobulina G/imunologia , Recém-Nascido , Doenças do Recém-Nascido/diagnóstico , Doenças do Recém-Nascido/virologia , Células Matadoras Naturais/imunologia , Gravidez , Complicações Infecciosas na Gravidez/virologia , Receptores de Antígenos de Linfócitos T gama-delta/imunologia , Receptores de Antígenos de Linfócitos T gama-delta/metabolismo , SARS-CoV-2/fisiologia , Linfócitos T/imunologia , Linfócitos T/metabolismo , Linfócitos T Reguladores/imunologiaRESUMO
Maternal morbidity and mortality continue to rise, and pre-eclampsia is a major driver of this burden1. Yet the ability to assess underlying pathophysiology before clinical presentation to enable identification of pregnancies at risk remains elusive. Here we demonstrate the ability of plasma cell-free RNA (cfRNA) to reveal patterns of normal pregnancy progression and determine the risk of developing pre-eclampsia months before clinical presentation. Our results centre on comprehensive transcriptome data from eight independent prospectively collected cohorts comprising 1,840 racially diverse pregnancies and retrospective analysis of 2,539 banked plasma samples. The pre-eclampsia data include 524 samples (72 cases and 452 non-cases) from two diverse independent cohorts collected 14.5 weeks (s.d., 4.5 weeks) before delivery. We show that cfRNA signatures from a single blood draw can track pregnancy progression at the placental, maternal and fetal levels and can robustly predict pre-eclampsia, with a sensitivity of 75% and a positive predictive value of 32.3% (s.d., 3%), which is superior to the state-of-the-art method2. cfRNA signatures of normal pregnancy progression and pre-eclampsia are independent of clinical factors, such as maternal age, body mass index and race, which cumulatively account for less than 1% of model variance. Further, the cfRNA signature for pre-eclampsia contains gene features linked to biological processes implicated in the underlying pathophysiology of pre-eclampsia.
Assuntos
Ácidos Nucleicos Livres , Pré-Eclâmpsia , RNA , Ácidos Nucleicos Livres/sangue , Feminino , Humanos , Pré-Eclâmpsia/diagnóstico , Pré-Eclâmpsia/genética , Valor Preditivo dos Testes , Gravidez , RNA/sangue , Estudos Retrospectivos , Sensibilidade e EspecificidadeRESUMO
BACKGROUND: Cervical cerclage, cervical pessary, and vaginal progesterone have each been shown to reduce preterm birth (PTB) in high-risk women, but to our knowledge, there has been no randomised comparison of the 3 interventions. The SuPPoRT "Stitch, Pessary, or Progesterone Randomised Trial" was designed to compare the rate of PTB <37 weeks between each intervention in women who develop a short cervix in pregnancy. METHODS AND FINDINGS: SuPPoRT was a multicentre, open label 3-arm randomised controlled trial designed to demonstrate equivalence (equivalence margin 20%) conducted from 1 July 2015 to 1 July 2021 in 19 obstetric units in the United Kingdom. Asymptomatic women with singleton pregnancies with transvaginal ultrasound cervical lengths measuring <25 mm between 14+0 and 23+6 weeks' gestation were eligible for randomisation (1:1:1) to receive either vaginal cervical cerclage (n = 128), cervical pessary (n = 126), or vaginal progesterone (n = 132). Minimisation variables were gestation at recruitment, body mass index (BMI), and risk factor for PTB. The primary outcome was PTB <37 weeks' gestation. Secondary outcomes included PTB <34 weeks', <30 weeks', and adverse perinatal outcome. Analysis was by intention to treat. A total of 386 pregnant women between 14+0 and 23+6 weeks' gestation with a cervical length <25 mm were randomised to one of the 3 interventions. Of these women, 67% were of white ethnicity, 18% black ethnicity, and 7.5% Asian ethnicity. Mean BMI was 25.6. Over 85% of women had prior risk factors for PTB; 39.1% had experienced a spontaneous PTB or midtrimester loss (>14 weeks gestation); and 45.8% had prior cervical surgery. Data from 381 women were available for outcome analysis. Using binary regression, randomised therapies (cerclage versus pessary versus vaginal progesterone) were found to have similar effects on the primary outcome PTB <37 weeks (39/127 versus 38/122 versus 32/132, p = 0.4, cerclage versus pessary risk difference (RD) -0.7% [-12.1 to 10.7], cerclage versus progesterone RD 6.2% [-5.0 to 17.0], and progesterone versus pessary RD -6.9% [-17.9 to 4.1]). Similarly, no difference was seen for PTB <34 and 30 weeks, nor adverse perinatal outcome. There were some differences in the mild side effect profile between interventions (vaginal discharge and bleeding) and women randomised to progesterone reported more severe abdominal pain. A small proportion of women did not receive the intervention as per protocol; however, per-protocol and as-treated analyses showed similar results. The main study limitation was that the trial was underpowered for neonatal outcomes and was stopped early due to the COVID-19 pandemic. CONCLUSIONS: In this study, we found that for women who develop a short cervix, cerclage, pessary, and vaginal progesterone were equally efficacious at preventing PTB, as judged with a 20% equivalence margin. Commencing with any of the therapies would be reasonable clinical management. These results can be used as a counselling tool for clinicians when managing women with a short cervix. TRIAL REGISTRATION: EU Clinical Trials register. EudraCT Number: 2015-000456-15, clinicaltrialsregister.eu., ISRCTN Registry: ISRCTN13364447, isrctn.com.
Assuntos
Cerclagem Cervical , Colo do Útero , Pessários , Nascimento Prematuro , Progesterona , Humanos , Feminino , Nascimento Prematuro/prevenção & controle , Progesterona/administração & dosagem , Progesterona/uso terapêutico , Gravidez , Cerclagem Cervical/métodos , Adulto , Administração Intravaginal , Colo do Útero/diagnóstico por imagem , Resultado do Tratamento , Medida do Comprimento CervicalRESUMO
INTRODUCTION: Spontaneous preterm birth prior to 32 weeks' gestation accounts for 1% of all deliveries and is associated with high rates of morbidity and mortality. A total of 70% are associated with chorioamnionitis which increases the incidence of morbidity, but for which there is no noninvasive antenatal test. Fetal adrenal glands produce cortisol and dehydroepiandosterone-sulphate which upregulate prior to spontaneous preterm birth. Ultrasound suggests that adrenal volumes may increase prior to preterm birth, but studies are limited. This study aimed to: (i) demonstrate reproducibility of magnetic resonance imaging (MRI) derived adrenal volumetry; (ii) derive normal ranges of total adrenal volumes, and adrenal: body volume for normal; (iii) compare with those who have spontaneous very preterm birth; and (iv) correlate with histopathological chorioamnionitis. MATERIAL AND METHODS: Patients at high risk of preterm birth prior to 32 weeks were prospectively recruited, and included if they did deliver prior to 32 weeks; a control group who delivered an uncomplicated pregnancy at term was also recruited. T2 weighted images of the entire uterus were obtained, and a deformable slice-to-volume method was used to reconstruct the fetal abdomen. Adrenal and body volumes were obtained via manual segmentation, and adrenal: body volume ratios generated. Normal ranges were created using control data. Differences between groups were investigated accounting for the effect of gestation by use of regression analysis. Placental histopathology was reviewed for pregnancies delivering preterm. RESULTS: A total of 56 controls and 26 cases were included in the analysis. Volumetry was consistent between observers. Adrenal volumes were not higher in the case group (p = 0.2); adrenal: body volume ratios were higher (p = 0.011), persisting in the presence of chorioamnionitis (p = 0.017). A cluster of three pairs of adrenal glands below the fifth centile were noted among the cases all of whom had a protracted period at risk of preterm birth prior to MRI. CONCLUSIONS: Adrenal: body volume ratios are significantly larger in fetuses who go on to deliver preterm than those delivering at term. Adrenal volumes were not significantly larger, we hypothesize that this could be due to an adrenal atrophy in fetuses with fulminating chorioamnionitis. A straightforward relationship of adrenal size being increased prior to preterm birth should not be assumed.
Assuntos
Corioamnionite , Nascimento Prematuro , Gravidez , Feminino , Humanos , Recém-Nascido , Nascimento Prematuro/diagnóstico por imagem , Corioamnionite/diagnóstico por imagem , Projetos Piloto , Reprodutibilidade dos Testes , Placenta , FetoRESUMO
BACKGROUND: Spontaneous preterm birth remains the main driver of childhood morbidity and mortality. Because of an incomplete understanding of the molecular pathways that result in spontaneous preterm birth, accurate predictive markers and target therapeutics remain elusive. OBJECTIVE: This study sought to determine if a cell-free RNA profile could reveal a molecular signature in maternal blood months before the onset of spontaneous preterm birth. STUDY DESIGN: Maternal samples (n=242) were obtained from a prospective cohort of individuals with a singleton pregnancy across 4 clinical sites at 12-24 weeks (nested case-control; n=46 spontaneous preterm birth <35 weeks and n=194 term controls). Plasma was processed via a next-generation sequencing pipeline for cell-free RNA using the Mirvie RNA platform. Transcripts that were differentially expressed in next-generation sequencing cases and controls were identified. Enriched pathways were identified in the Reactome database using overrepresentation analysis. RESULTS: Twenty five transcripts associated with an increased risk of spontaneous preterm birth were identified. A logistic regression model was developed using these transcripts to predict spontaneous preterm birth with an area under the curve =0.80 (95% confidence interval, 0.72-0.87) (sensitivity=0.76, specificity=0.72). The gene discovery and model were validated through leave-one-out cross-validation. A unique set of 39 genes was identified from cases of very early spontaneous preterm birth (<25 weeks, n=14 cases with time to delivery of 2.5±1.8 weeks); a logistic regression classifier on the basis of these genes yielded an area under the curve=0.76 (95% confidence interval, 0.63-0.87) in leave-one-out cross validation. Pathway analysis for the transcripts associated with spontaneous preterm birth revealed enrichment of genes related to collagen or the extracellular matrix in those who ultimately had a spontaneous preterm birth at <35 weeks. Enrichment for genes in insulin-like growth factor transport and amino acid metabolism pathways were associated with spontaneous preterm birth at <25 weeks. CONCLUSION: Second trimester cell-free RNA profiles in maternal blood provide a noninvasive window to future occurrence of spontaneous preterm birth. The systemic finding of changes in collagen and extracellular matrix pathways may serve to identify individuals at risk for premature cervical remodeling, with growth factor and metabolic pathways implicated more often in very early spontaneous preterm birth. The use of cell-free RNA profiles has the potential to accurately identify those at risk for spontaneous preterm birth by revealing the underlying pathophysiology, creating an opportunity for more targeted therapeutics and effective interventions.
Assuntos
Ácidos Nucleicos Livres , Nascimento Prematuro , Ácidos Nucleicos Livres/genética , Colo do Útero , Feminino , Humanos , Recém-Nascido , Gravidez , Nascimento Prematuro/genética , Estudos Prospectivos , RNARESUMO
Chorioamnionitis is present in up to 70% of spontaneous preterm births. It is defined as an acute inflammation of the chorion, with or without involvement of the amnion, and is evidence of a maternal immunological response to infection. A fetal inflammatory response can coexist and is diagnosed on placental histopathology postnatally. Fetal inflammatory response syndrome (FIRS) is associated with poorer fetal and neonatal outcomes. The only antenatal diagnostic test is amniocentesis which carries risks of miscarriage or preterm birth. Imaging of the fetal immune system, in particular the thymus and the spleen, and the placenta may give valuable information antenatally regarding the diagnosis of fetal inflammatory response. While ultrasound is largely limited to structural information, MRI can complement this with functional information that may provide insight into the metabolic activities of the fetal immune system and placenta. This review discusses fetal and placental imaging in pregnancies complicated by chorioamnionitis and their potential future use in achieving non-invasive antenatal diagnosis.
Assuntos
Corioamnionite , Nascimento Prematuro , Amniocentese , Corioamnionite/diagnóstico por imagem , Feminino , Doenças Fetais , Humanos , Recém-Nascido , Placenta/diagnóstico por imagem , Placenta/patologia , Gravidez , Síndrome de Resposta Inflamatória SistêmicaRESUMO
The contribution and role of psychologists, psychiatrists or mental health practitioners in working alongside forced migrants may take many forms. The guidance on which this paper is based, came about when several members of the British Psychological Society (including those with lived experience and insight and those who had set up services); became aware of the need for good practice guidance for clinicians working with refugees, asylum seekers including forced migrants across Britain. These guidelines cover a range of areas where clinicians work with individuals in clinical contexts, schools, nurseries, colleges and within community organisations.
Assuntos
Refugiados , Humanos , Refugiados/psicologia , Saúde MentalRESUMO
281 million people were recorded as having migrated across national borders by the United Nations in 2021, this equates to approximately 3.6 percent of the world's population. Forced migrants/refugees account for 12 per cent of all international migrants. A percentage of these people will not speak the language of their new country fluently. If they are to access and utilize mental health services, they will require access to an interpreter. This paper provides guidance on working with interpreters in health settings when the work is either face to face or on-line. These guidelines are based on those written by the authors for the British Psychological Society. Working effectively with interpreters should be a skill in the repertoire of every clinician. This is to ensure that equal opportunities are upheld and that certain groups (including forced migrants) are not denied access to mental health services. Interpreters may also assist with teaching clinicians about diverse cultural views surrounding mental health and well-being. They may also advise on idioms of distress, cultural meanings and expression of emotional problems across cultures, explanatory health models and contextual factors which may help extend the repertoire of clinicians. The guidelines cover key recommendations for practice, booking and finding an interpreter, preparation before the consultation/meeting, practical considerations, preparation with the interpreter, during the meeting/consultation, issues to address after the meeting, written translations, psychometric testing, working by telephone or online and other issues to consider when working with an interpreter. These are reproduced below (with the permission of the BPS) in a shortened and updated form.Key recommendations for practiceUndertake a language needs analysis of the population covered by your service or Trust and consider how you will best meet needs.If you have not undertaken training in working with interpreters, undertake a training course. If you are working with an interpreter unexpectedly and training is not feasible, read these or other relevant guidelines and allocate time to consider the issues or discuss them with a more experienced colleague.Check that the interpreter is qualified and appropriate for the consultation/meeting and speaks the service user's first language.Allocate 10-15 minutes in advance of the session to brief the interpreter about the purpose of the meeting and to enable them to inform you about any cultural issues which may have bearing on the session.Be mindful of issues of confidentiality and trust when working with someone from a small language community as the service user may be anxious about being identifiable and mistrustful of an interpreter's professionalism. This has particular relevance when working with forced migrants.State clearly that you alone hold clinical responsibility for the meeting.Commit to a collaborative working relationship based on trust and mutual respect.Match if appropriate for gender, age or religion, avoid using relatives and never use a child.Create an atmosphere where each member of the triad feels able to ask for clarification if anything is unclear and be respectful to your interpreter, they are an important member of the team who makes your work possible.Be aware of the well-being of your interpreter and mindful of the risk of vicarious traumatization. Consider what support they will be offered, and if they are subcontracted from an external agency, be aware that there is often little support provided by their employer.At the end of the session always allocate 10-15 minutes to debrief the interpreter about the session and offer support and supervision as appropriate.Extreme caution should be exercised when considering the use of translated assessment measures as languages and concepts are not interchangeable and results may therefore not be valid or meaningful.All written translations used should have been back translated to ensure they are fit for purpose.Commissioners of health services need to ensure that there are clear pathways to support for all members of their local community including those who do not speak the majority language.
Assuntos
Saúde Mental , Migrantes , Criança , Humanos , Idioma , Tradução , Cuidados PaliativosRESUMO
BACKGROUND: Preterm delivery (before 37 weeks of gestation) is the single most important contributor to neonatal death and morbidity, with lifelong repercussions. However, the majority of women who present with preterm labour (PTL) symptoms do not deliver imminently. Accurate prediction of PTL is needed in order ensure correct management of those most at risk of preterm birth (PTB) and to prevent the maternal and fetal risks incurred by unnecessary interventions given to the majority. The QUantitative Innovation in Predicting Preterm birth (QUIPP) app aims to support clinical decision-making about women in threatened preterm labour (TPTL) by combining quantitative fetal fibronectin (qfFN) values, cervical length (CL), and significant PTB risk factors to create an individualised percentage risk of delivery. METHODS AND FINDINGS: EQUIPTT was a multi-centre cluster randomised controlled trial (RCT) involving 13 maternity units in South and Eastern England (United Kingdom) between March 2018 and February 2019. Pregnant women (n = 1,872) between 23+0 and 34+6 weeks' gestation with symptoms of PTL in the analysis period were assigned to either the intervention (762) or control (1,111). The mean age of the study population was 30.2 (+/- SD 5.93). A total of 56.0% were white, 19.6% were black, 14.2% were Asian, and 10.2% were of other ethnicities. The intervention was the use of the QUiPP app with admission, antenatal corticosteroids (ACSs), and transfer advised for women with a QUiPP risk of delivery >5% within 7 days. Control sites continued with their conventional management of TPTL. Unnecessary management for TPTL was a composite primary outcome defined by the sum of unnecessary admission decisions (admitted and delivery interval >7 days or not admitted and delivery interval ≤7 days) and the number of unnecessary in utero transfer (IUT) decisions/actions (IUT that occurred or were attempted >7 days prior to delivery) and ex utero transfers (EUTs) that should have been in utero (attempted and not attempted). Unnecessary management of TPTL was 11.3% (84/741) at the intervention sites versus 11.5% (126/1094) at control sites (odds ratio [OR] 0.97, 95% confidence interval [CI] 0.66-1.42, p = 0.883). Control sites frequently used qfFN and did not follow UK national guidance, which recommends routine treatment below 30 weeks without testing. Unnecessary management largely consisted of unnecessary admissions which were similar at intervention and control sites (10.7% versus 10.8% of all visits). In terms of adverse outcomes for women in TPTL <36 weeks, 4 women from the intervention sites and 12 from the control sites did not receive recommended management. If the QUiPP percentage risk was used as per protocol, unnecessary management would have been 7.4% (43/578) versus 9.9% (134/1,351) (OR 0.72, 95% CI 0.45-1.16). Our external validation of the QUiPP app confirmed that it was highly predictive of delivery in 7 days; receiver operating curve area was 0.90 (95% CI 0.85-0.95) for symptomatic women. Study limitations included a lack of compliance with national guidance at the control sites and difficulties in implementation of the QUiPP app. CONCLUSIONS: This cluster randomised trial did not demonstrate that the use of the QUiPP app reduced unnecessary management of TPTL compared to current management but would safely improve the management recommended by the National Institute for Health and Care Excellence (NICE). Interpretation of qfFN, with or without the QUiPP app, is a safe and accurate method for identifying women most likely to benefit from PTL interventions. TRIAL REGISTRATION: ISRCTN Registry ISRCTN17846337.
Assuntos
Aplicativos Móveis , Trabalho de Parto Prematuro/diagnóstico , Trabalho de Parto Prematuro/prevenção & controle , Adulto , Feminino , Humanos , GravidezRESUMO
Cyclic adenosine monophosphate (cAMP) contributes to maintenance of a quiescent (relaxed) state in the myometrium (i.e. uterine smooth muscle) during pregnancy, which most commonly has been attributed to activation of protein kinase A (PKA). PKA-mediated phosphorylation of cytosolic contractile apparatus components in myometrial smooth muscle cells (mSMCs) are known to promote relaxation. Additionally, PKA also regulates nuclear transcription factor (TF) activity to control expression of genes important to the labour process; these are mostly involved in actin-myosin interactions, cell-to-cell connectivity and inflammation, all of which influence mSMC transition from a quiescent to a contractile (pro-labour) phenotype. This review focuses on the evidence that cAMP modulates the activity of TFs linked to pro-labour gene expression, predominantly cAMP response element (CRE) binding TFs, nuclear factor κB (NF-κB), activator protein 1 (AP-1) family and progesterone receptors (PRs). This review also considers the more recently described exchange protein directly activated by cAMP (EPAC) that may oppose the pro-quiescent effects of PKA, as well as explores findings from other cell types that have the potential to be of novel relevance to cAMP action on TF function in the myometrium.
Assuntos
AMP Cíclico/metabolismo , Regulação da Expressão Gênica , Músculo Liso/metabolismo , Miométrio/metabolismo , Parto/genética , Fatores de Transcrição/genética , Proteínas Quinases Dependentes de AMP Cíclico/genética , Proteínas Quinases Dependentes de AMP Cíclico/metabolismo , Feminino , Humanos , Trabalho de Parto/genética , Trabalho de Parto/metabolismo , NF-kappa B/genética , NF-kappa B/metabolismo , Parto/metabolismo , Gravidez , Fatores de Transcrição/metabolismoRESUMO
INTRODUCTION: Preterm prelabor rupture of membranes (PPROM) complicates 3% of pregnancies in the UK. Where delivery does not occur spontaneously, expectant management until 37 weeks of gestation is advocated, unless signs of maternal infection develop. However, clinical presentation of maternal infection can be a late sign and injurious fetal inflammatory responses may already have been activated. There is therefore a need for more sensitive markers to aid optimal timing of interventions. At present there is no non-invasive test in clinical practice to assess for infection in the fetal compartment and definitive diagnosis of chorioamnionitis is by histological assessment of the placenta after delivery. This study presents comprehensive functional placental magnetic resonance imaging (MRI) quantification, already used in other organ systems, to assess for infection/inflammation, in women with and without PPROM aiming to explore its use as a biomarker for inflammation within the feto-placental compartment in vivo. MATERIAL AND METHODS: Placental MRI scans were performed in a cohort of 12 women (with one having two scans) with PPROM before 34 weeks of gestation (selected because of their high risk of infection), and in a control group of 87 women. Functional placental assessment was performed with magnetic resonance techniques sensitive to changes in the microstructure (diffusion) and tissue composition (relaxometry), with quantification performed both over the entire organ and in regions of interest between the basal and chorionic plate. Placental histology was analyzed after delivery where available. RESULTS: Normative evolution of functional magnetic resonance biomarkers over gestation was studied. Cases of inflammation, as assessed by histological presence of chorioamnionitis, and umbilical cord vasculitis with or without funisitis, were associated with lower T2* (mean T2* at 30 weeks 50 ms compared with 58 ms in controls) and higher fractional anisotropy (mean at 30 weeks 0.55 compared with 0.45 in controls). These differences did not reach significance and there was substantial heterogeneity both in T2* and Apparent Diffusivitiy across the cohort. CONCLUSIONS: This first exploration of functional placental assessment in a cohort of women with PPROM demonstrates that functional placental MRI can reveal a range of placental changes associated with inflammatory processes. It is a promising tool to gain information and in the future to identify inflammation in vivo, and could therefore assist in improving optimal timing for interventions designed to prevent fetal injury.
Assuntos
Ruptura Prematura de Membranas Fetais/diagnóstico por imagem , Diagnóstico Pré-Natal , Adulto , Feminino , Humanos , Londres , Imageamento por Ressonância Magnética , Projetos Piloto , Gravidez , Estudos Prospectivos , Centros de Atenção TerciáriaRESUMO
INTRODUCTION: Infection and inflammation have been implicated in the etiology and subsequent morbidity associated with preterm birth. At present, there are no tests to assess for fetal compartment infection. The thymus, a gland integral in the fetal immune system, has been shown to involute in animal models of antenatal infection, but its response in human fetuses has not been studied. This study aims: (a) to generate magnetic resonance imaging (MRI) -derived fetal thymus volumes standardized for fetal weight; (b) to compare standardized thymus volumes from fetuses that delivered before 32 weeks of gestation with fetuses that subsequently deliver at term; (c) to assess thymus size as a predictor of preterm birth; and (d) to correlate the presence of chorioamnionitis and funisitis at delivery with thymic volumes in utero in fetuses that subsequently deliver preterm. MATERIAL AND METHODS: Women at high-risk of preterm birth at 20-32 weeks of gestation were recruited. A control group was obtained from existing data sets acquired as part of three research studies. A fetal MRI was performed on a 1.5T or 3T MRI scanner: T2 weighted images were obtained of the entire uterine content and specifically the fetal thorax. A slice-to-volume registration method was used for reconstruction of three-dimensional images of the thorax. Thymus segmentations were performed manually. Body volumes were calculated by manual segmentation and thymus:body volume ratios were generated. Comparison of groups was performed using multiple regression analysis. Normal ranges were created for thymus volume and thymus:body volume ratios using the control data. Receiver operating curves (ROC) curves were generated for thymus:body volume ratio and gestation-adjusted thymus volume centiles as predictors of preterm birth. Placental histology was analyzed where available from pregnancies that delivered very preterm and the presence of chorioamnionitis/funisitis was noted. RESULTS: Normative ranges were created for thymus volume, and thymus volume was standardized for fetal size from fetuses that subsequently delivered at term, but were imaged at 20-32 weeks of gestation. Image data sets from 16 women that delivered <32 weeks of gestation (ten with ruptured membranes and six with intact membranes) and 80 control women that delivered >37 weeks were included. Mean gestation at MRI of the study group was 28+4 weeks (SD 3.2) and for the control group was 25+5 weeks (SD 2.4). Both absolute fetal thymus volumes and thymus:body volume ratios were smaller in fetuses that delivered preterm (P < .001). Of the 16 fetuses that delivered preterm, 13 had placental histology, 11 had chorioamnionitis, and 9 had funisitis. The strongest predictors of prematurity were the thymus volume Z-score and thymus:body volume ratio Z-score (ROC areas 0.915 and 0.870, respectively). CONCLUSIONS: We have produced MRI-derived normal ranges for fetal thymus and thymus:body volume ratios between 20 and 32 weeks of gestation. Fetuses that deliver very preterm had reduced thymus volumes when standardized for fetal size. A reduced thymus volume was also a predictor of spontaneous preterm delivery. Thymus volume may be a suitable marker of the fetal inflammatory response, although further work is needed to assess this, increasing the sample size to correlate the extent of chorioamnionitis with thymus size.
Assuntos
Nascimento Prematuro/diagnóstico por imagem , Timo/diagnóstico por imagem , Timo/fisiologia , Ultrassonografia Pré-Natal/métodos , Adulto , Estudos de Casos e Controles , Feminino , Ruptura Prematura de Membranas Fetais/diagnóstico por imagem , Idade Gestacional , Humanos , Recém-Nascido , Imageamento por Ressonância Magnética , Tamanho do Órgão/fisiologia , Projetos Piloto , Gravidez , Gravidez de Alto Risco , Timo/embriologia , Timo/patologiaRESUMO
Investigating culturally specific views and experiences of trauma and resilience can offer new insights that can aid distress management, meaning making, coping and resilience in adverse conditions, and inform emergency and disaster responses. Sumud is a Palestinian cultural construct and component of resilience in the occupied Palestinian territories (oPt). Sumud in Arabic refers to steadfastness or perseverance. This literature review focuses on research studies on Sumud in the oPt, with particular attention to the meaning and manifestations of Sumud, the role of non-violent resistance, and how Sumud and non-violent resistance informs resilience and coping in the context of a military occupation, protracted political conflict, and chronic adversity. The peer-reviewed literature was surveyed using the PubMed and PsycINFO databases. The findings indicate how Sumud is a central component of resilience and provides a meta-cognitive framework which Palestinians use to interpret, cope and respond to ongoing injustice and traumatic experiences, engendering a sense of purpose and meaning. It is both a value and an action that manifests via individual and collective action to protect family and community survival, wellbeing, dignity, Palestinian identity and culture, and a determination to remain on the land. The implications of this study and the relevance of the findings to mental health and disaster relief are considered.
Assuntos
Adaptação Psicológica , Árabes , Conflitos Armados/psicologia , Humanos , Estudos Longitudinais , Oriente Médio , Inquéritos e QuestionáriosRESUMO
Identifying culturally-relevant concepts and coping mechanisms can help protect civilian wellbeing. This study explores how seven professional Palestinian university graduates in the Gaza Strip (occupied Palestinian territories) cope with war, military occupation, military blockade and the challenges of living in a conflict-affected area. Participants were interviewed to determine whether culturally specific modes of coping were used. Thematic analysis was applied. The use of resistance and more specifically sumud, 1 being steadfast and persevering, were identified alongside the motivation to persevere and other adaptive responses to living conditions. Coping strategies identified in this study include adapting, problem-solving, accepting reality, exercising patience, utilising social support, and faith in God (iman) and religion. The implications of this study and the relevance of the findings to mental health and disaster relief are considered.
Assuntos
Adaptação Psicológica , Saúde Mental/estatística & dados numéricos , Militares , Política , Guerra/psicologia , Adulto , Feminino , Humanos , Masculino , Oriente Médio , Religião , Apoio Social , Adulto JovemRESUMO
Numbers of older adults are rising globally. In the UK, rates of mental ill-health are thought to be higher in Black Asian and Minority Ethnic communities than in the white population. Older adults from BAME groups are an under researched group. It is important to understand the experiences and beliefs that underlie help-seeking behaviour among BAME older adults to deliver effective, culturally appropriate, and accessible services. This study aims to explore help-seeking views and strategies utilized in relation to depression among older Black Caribbean people in the UK. Semi-structured interviews were conducted with eight UK Black Caribbean participants, aged between 65 and 79 years. Transcripts were analysed using Interpretative Phenomenological Analysis. Three master themes emerged from the analysis: (1) 'If you don't know, you don't seek help', (2) 'I was depressed I knew I was depressed', 3) 'You have to decide': Attitudes to help-seeking and mental health service use. Participants' past personal experiences of coping with depression, including migratory histories, cultural and religious views, and personal relationships influenced their help-seeking views and preferred coping methods for depression.
Assuntos
População Negra/psicologia , Depressão/psicologia , Depressão/terapia , Pesquisa Qualitativa , Idoso , Região do Caribe/etnologia , Feminino , Humanos , Masculino , Reino UnidoRESUMO
BACKGROUND: Within the current context of a global pandemic, the value of the Internet has been greatly elevated for many people. This study is an investigation into a 30-day online intervention called Creativity in Mind (CIM). AIMS: To provide a preliminary indication of the relationship between participation in CIM and change in mood symptoms and wellbeing. METHODS: A co-produced mixed methods design was used to evaluate CIM. Data was obtained from 55 participants. Each day for 30 days participants received a predetermined creative challenge that they were encouraged to complete and share within the group. Measures of mood and wellbeing were collected at three time points, including a 3-month follow-up. Qualitative interviews were undertaken with 18 participants and analysed using framework analysis. RESULTS: Scores on mood and wellbeing measures showed an overall significant improvement following completion of the programme. However, only a small number of participants demonstrated clinically significant improvement (14%) or deterioration (5%). The qualitative data indicated that CIM was experienced positively, with some negative emotions arising from the volume of interactions and negative comparisons made between participants. CONCLUSIONS: Preliminary results demonstrate that the pattern of clinically significant change across individual participants was comparable to other psychological therapy.
Assuntos
Intervenção Baseada em Internet , Afeto , Ansiedade , Transtornos de Ansiedade , Depressão , HumanosRESUMO
BACKGROUND: Midwifery continuity of care is the only health system intervention shown to reduce preterm birth (PTB) and improve perinatal survival, but no trial evidence exists for women with identified risk factors for PTB. We aimed to assess feasibility, fidelity, and clinical outcomes of a model of midwifery continuity of care linked with a specialist obstetric clinic for women considered at increased risk for PTB. METHODS AND FINDINGS: We conducted a hybrid implementation-effectiveness, randomised, controlled, unblinded, parallel-group pilot trial at an inner-city maternity service in London (UK), in which pregnant women identified at increased risk of PTB were randomly assigned (1:1) to either midwifery continuity of antenatal, intrapartum, and postnatal care (Pilot study Of midwifery Practice in Preterm birth Including women's Experiences [POPPIE] group) or standard care group (maternity care by different midwives working in designated clinical areas). Pregnant women attending for antenatal care at less than 24 weeks' gestation were eligible if they fulfilled one or more of the following criteria: previous cervical surgery, cerclage, premature rupture of membranes, PTB, or late miscarriage; previous short cervix or short cervix this pregnancy; or uterine abnormality and/or current smoker of tobacco. Feasibility outcomes included eligibility, recruitment and attrition rates, and fidelity of the model. The primary outcome was a composite of appropriate and timely interventions for the prevention and/or management of preterm labour and birth. We analysed by intention to treat. Between 9 May 2017 and 30 September 2018, 334 women were recruited; 169 women were allocated to the POPPIE group and 165 to the standard group. Mean maternal age was 31 years; 32% of the women were from Black, Asian, and ethnic minority groups; 70% were in employment; and 46% had a university degree. Nearly 70% of women lived in areas of social deprivation. More than a quarter of women had at least one pre-existing medical condition and multiple risk factors for PTB. More than 75% of antenatal and postnatal visits were provided by a named/partner midwife, and a midwife from the POPPIE team was present at 80% of births. The incidence of the primary composite outcome showed no statistically significant difference between groups (POPPIE group 83.3% versus standard group 84.7%; risk ratio 0.98 [95% confidence interval (CI) 0.90 to 1.08]; p = 0.742). Infants in the POPPIE group were significantly more likely to have skin-to-skin contact after birth, to have it for a longer time, and to breastfeed immediately after birth and at hospital discharge. There were no differences in other secondary outcomes. The number of serious adverse events was similar in both groups and unrelated to the intervention (POPPIE group 6 versus standard group 5). Limitations of this study included the limited power and the nonmasking of group allocation; however, study assignment was masked to the statistician and researchers who analysed the data. CONCLUSIONS: In this study, we found that it is feasible to set up and achieve fidelity of a model of midwifery continuity of care linked with specialist obstetric care for women at increased risk of PTB in an inner-city maternity service in London (UK), but there is no impact on most outcomes for this population group. Larger appropriately powered trials are needed, including in other settings, to evaluate the impact of relational continuity and hypothesised mechanisms of effect based on increased trust and engagement, improved care coordination, and earlier referral on disadvantaged communities, including women with complex social factors and social vulnerability. TRIAL REGISTRATION: We prospectively registered the pilot trial on the UK Clinical Research Network Portfolio Database (ID number: 31951, 24 April 2017). We registered the trial on the International Standard Randomised Controlled Trial Number (ISRCTN) (Number: 37733900, 21 August 2017) and before trial recruitment was completed (30 September 2018) when informed that prospective registration for a pilot trial was also required in a primary clinical trial registry recognised by WHO and the International Committee of Medical Journal Editors (ICMJE). The protocol as registered and published has remained unchanged, and the analysis conforms to the original plan.
Assuntos
Continuidade da Assistência ao Paciente/organização & administração , Cuidado Pós-Natal/métodos , Cuidado Pré-Natal/métodos , Adulto , Cesárea , Etnicidade , Feminino , Idade Gestacional , Humanos , Lactente , Recém-Nascido , Idade Materna , Serviços de Saúde Materna/tendências , Tocologia/tendências , Grupos Minoritários , Trabalho de Parto Prematuro , Obstetrícia , Parto , Projetos Piloto , Gravidez , Nascimento Prematuro/prevenção & controle , Estudos Prospectivos , Distribuição Aleatória , Reino Unido/epidemiologiaRESUMO
BACKGROUND: Intrahepatic cholestasis of pregnancy is associated with adverse perinatal outcomes, but the association with the concentration of specific biochemical markers is unclear. We aimed to quantify the adverse perinatal effects of intrahepatic cholestasis of pregnancy in women with increased serum bile acid concentrations and determine whether elevated bile acid concentrations were associated with the risk of stillbirth and preterm birth. METHODS: We did a systematic review by searching PubMed, Web of Science, and Embase databases for studies published from database inception to June 1, 2018, reporting perinatal outcomes for women with intrahepatic cholestasis of pregnancy when serum bile acid concentrations were available. Inclusion criteria were studies defining intrahepatic cholestasis of pregnancy based upon pruritus and elevated serum bile acid concentrations, with or without raised liver aminotransferase concentrations. Eligible studies were case-control, cohort, and population-based studies, and randomised controlled trials, with at least 30 participants, and that reported bile acid concentrations and perinatal outcomes. Studies at potential higher risk of reporter bias were excluded, including case reports, studies not comprising cohorts, or successive cases seen in a unit; we also excluded studies with high risk of bias from groups selected (eg, a subgroup of babies with poor outcomes were explicitly excluded), conference abstracts, and Letters to the Editor without clear peer review. We also included unpublished data from two UK hospitals. We did a random effects meta-analysis to determine risk of adverse perinatal outcomes. Aggregate data for maternal and perinatal outcomes were extracted from case-control studies, and individual patient data (IPD) were requested from study authors for all types of study (as no control group was required for the IPD analysis) to assess associations between biochemical markers and adverse outcomes using logistic and stepwise logistic regression. This study is registered with PROSPERO, number CRD42017069134. FINDINGS: We assessed 109 full-text articles, of which 23 studies were eligible for the aggregate data meta-analysis (5557 intrahepatic cholestasis of pregnancy cases and 165â136 controls), and 27 provided IPD (5269 intrahepatic cholestasis of pregnancy cases). Stillbirth occurred in 45 (0·83%) of 4936 intrahepatic cholestasis of pregnancy cases and 519 (0·32%) of 163â947 control pregnancies (odds ratio [OR] 1·46 [95% CI 0·73-2·89]; I2=59·8%). In singleton pregnancies, stillbirth was associated with maximum total bile acid concentration (area under the receiver operating characteristic curve [ROC AUC]) 0·83 [95% CI 0·74-0·92]), but not alanine aminotransferase (ROC AUC 0·46 [0·35-0·57]). For singleton pregnancies, the prevalence of stillbirth was three (0·13%; 95% CI 0·02-0·38) of 2310 intrahepatic cholestasis of pregnancy cases in women with serum total bile acids of less than 40 µmol/L versus four (0·28%; 0·08-0·72) of 1412 cases with total bile acids of 40-99 µmol/L (hazard ratio [HR] 2·35 [95% CI 0·52-10·50]; p=0·26), and versus 18 (3·44%; 2·05-5·37) of 524 cases for bile acids of 100 µmol/L or more (HR 30·50 [8·83-105·30]; p<0·0001). INTERPRETATION: The risk of stillbirth is increased in women with intrahepatic cholestasis of pregnancy and singleton pregnancies when serum bile acids concentrations are of 100 µmol/L or more. Because most women with intrahepatic cholestasis of pregnancy have bile acids below this concentration, they can probably be reassured that the risk of stillbirth is similar to that of pregnant women in the general population, provided repeat bile acid testing is done until delivery. FUNDING: Tommy's, ICP Support, UK National Institute of Health Research, Wellcome Trust, and Genesis Research Trust.
Assuntos
Ácidos e Sais Biliares/sangue , Colestase Intra-Hepática/sangue , Complicações na Gravidez/sangue , Nascimento Prematuro/sangue , Natimorto , Alanina Transaminase/sangue , Aspartato Aminotransferases/sangue , Bilirrubina/sangue , Biomarcadores/sangue , Estudos de Casos e Controles , Colestase Intra-Hepática/epidemiologia , Estudos de Coortes , Feminino , Humanos , Recém-Nascido , Morte Perinatal , Gravidez , Complicações na Gravidez/epidemiologia , Nascimento Prematuro/epidemiologia , Curva ROC , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Risco , Natimorto/epidemiologiaRESUMO
INTRODUCTION: To evaluate cervicovaginal fluid quantitative fetal fibronectin, measured by a bedside analyzer, to predict spontaneous preterm birth in twin pregnancy before 30 weeks of gestation. MATERIAL AND METHODS: In a prospective cohort study, we studied the accuracy of quantitative fetal fibronectin measured between 18 and 27+6 weeks of gestation in high-risk asymptomatic women with twin pregnancies, to predict spontaneous preterm birth before 30 weeks of gestation. Predefined fetal fibronectin thresholds were ≥10, ≥50 and ≥200 ng/mL. Predictive statistics were also calculated to evaluate accuracy of "early" tests, performed between 18 and 21+6 weeks and "standard" tests performed between 22+0 and 27+6 weeks of gestation in the same cohort. Subgroup analysis was performed according to cervical length measurement. In addition, we compared accuracy of prediction with quantitative fetal fibronectin measured during the standard test period in asymptomatic twin pregnancy with no additional risk factors, to twin pregnancies with one or more additional risk factors for spontaneous preterm birth. RESULTS: Of 130 eligible women identified with quantitative fetal fibronectin tests undertaken during the standard testing period, 9% delivered before 30 weeks of gestation. Quantitative fetal fibronectin was significantly related to outcome before 30/40 (ROC curves of 0.8 [95% CI 0.7-1]). Early tests were not significantly predictive; ROC area 0.53 (95% CI 0.29-0.81). There was a trend towards better predictive accuracy when one or more additional risk factors for spontaneous preterm birth or cervical length were considered. CONCLUSIONS: Quantitative fetal fibronectin measured from 22 to 27+6 weeks of gestation accurately predicts spontaneous preterm birth at <30 weeks of gestation. Tests undertaken earlier are of limited value. Consideration of cervical length or prior history in addition to quantitative fetal fibronectin strengthens prediction.
Assuntos
Líquido Amniótico/química , Fibronectinas/análise , Nascimento Prematuro/diagnóstico , Medida do Comprimento Cervical , Feminino , Humanos , Gravidez , Gravidez de GêmeosRESUMO
BACKGROUND AND OBJECTIVE: PRECISE is a population-based, prospective pregnancy cohort study designed for deep phenotyping of pregnancies in women with placenta-related disorders, and in healthy controls. The PRECISE Network is recruiting ~ 10,000 pregnant women in three countries (The Gambia, Kenya, and Mozambique) representing sub-Saharan Africa. The principal aim is to improve our understanding of pre-eclampsia, fetal growth restriction and stillbirth. This involves the creation of a highly curated biorepository for state of the art discovery science and a rich database of antenatal variables and maternal and neonatal outcomes. Our overarching aim is to provide large sample numbers with adequate power to address key scientific questions. Here we describe our experience of establishing a biorepository in the PRECISE Network and review the issues and challenges surrounding set-up, management and scientific use. METHODS: The feasibility of collecting and processing each sample type was assessed in each setting and plans made for establishing the necessary infrastructure. Quality control (QC) protocols were established to ensure that biological samples are 'fit-for-purpose'. The management structures required for standardised sample collection and processing were developed. This included the need for transport of samples between participating countries and to external academic/commercial institutions. RESULTS: Numerous practical challenges were encountered in setting up the infrastructure including facilities, staffing, training, cultural barriers, procurement, shipping and sample storage. Whilst delaying the project, these were overcome by establishing good communication with the sites, training workshops and constant engagement with the necessary commercial suppliers. A Project Executive Committee and Biology Working Group together defined the biospecimens required to answer the research questions paying particular attention to harmonisation of protocols with other cohorts so as to enable cross-biorepository collaboration. Governance structures implemented include a Data and Sample Committee to ensure biospecimens and data will be used according to consent, and prioritisation by scientific excellence. A coordinated sample and data transfer agreement will prevent delay in sample sharing. DISCUSSION: With adequate training and infrastructure, it is possible to establish high quality sample collections to facilitate research programmes such as the PRECISE Network in sub-Saharan Africa. These preparations are pre-requisites for effective execution of a biomarker-based approach to better understand the complexities of placental disease in these settings, and others.