O-129 Lactobacillus deplete vaginal microbial composition is associated with chromosomally normal miscarriage and local inflammation

Study question

To investigate the vaginal microbial composition and the local immune response in chromosomally normal and abnormal miscarriages and compare this to uncomplicated pregnancies delivering at term.

Summary answer

We show that euploid miscarriage is associated with a significantly higher prevalence of Lactobacillus spp. deplete vaginal microbial communities compared to aneuploid miscarriage.

What is known already

Emerging evidence supports the role of the vaginal microbiota in adverse pregnancy outcome, but the underlying mechanisms are poorly understood. A dominance of Lactobacillus spp. in pregnancy provides protection against pathogenic bacteria by producing lactic acid and antimicrobial compounds. A depletion in Lactobacillus spp. is often linked to adverse pregnancy outcomes.Current work also implicates the reproductive tract microbiota as a key modulator of local inflammatory and immune pathways. We have previously shown that miscarriage is associated with vaginal dysbiosis but without knowledge of the cytogenetic status of those miscarriages or the local immune profile.

Study design, size, duration

This study was a prospective observational cohort study based at Queen Charlotte’s & Chelsea Hospital, Early Pregnancy Unit, London between March 2014-February 2019. Vaginal swabs were collected from the posterior vaginal fornix of 167 patients.

Participants/materials, setting, methods

We used 16S rRNA gene based metataxonomics to interrogate the vaginal microbiota in a cohort of 167 women, 93 miscarriage patients (54 euploid and 39 aneuploid using molecular cytogenetics) and 74 women who delivered at term and correlate this with the aneuploidy status of the miscarriages. We also measured the concentrations of IL-2, IL-4, IL-6, IL-8, TNF-α, IFN-γ, IL-1β, IL-18 and IL-10 in cervical vaginal fluid using Human Magnetic Luminex Screening Assay (8-plex).

Main results and the role of chance

We show that euploid miscarriage is associated with a significantly higher prevalence of Lactobacillus spp. deplete vaginal microbial communities compared to aneuploid miscarriage (P=0.008). In women having Lactobacillus spp. deplete vaginal microbial communities, euploid miscarriage associates with higher concentrations of pro-inflammatory cytokines IL-1β, IL-8, IL-6 (P<0.001, P=0.01 and P<0.001 respectively) and lower concentrations of anti-inflammatory cytokines IL10 (P<0.001) when compared to viable term pregnancy. We identified Prevotella bivia and Streptococcus as particularly common in euploid miscarriage and as drivers of pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α). Co-occurrence network analyses revealed low levels of co-occurrence between Lactobacillus crispatus and other organisms and strong co-occurrence between Streptococcal species. Our data show a combination of both an adverse vaginal microbiota and a cytokine response to it influences early pregnancy outcome. Although this may be a reflection of intrinsic maternal immune response, it appears that the cytokine response is largely driven by the bacterial taxa present in the vagina, which presents an opportunity for specific, directed intervention. The negative co-occurrence between L.crispatus and all other organisms suggests a possible therapeutic role for probiotics containing this organism. The influence of Streptococci also suggests a potential benefit of targeted antibiotics with probiotics for some patients.

Limitations, reasons for caution

There were no longitudinal samples in this cohort and our results are based on the assumption that the vaginal microbial composition is stable throughout the first trimester.Future longitudinal studies with larger sample sizes are needed to corroborate these findings and provide insights to the mechanisms that trigger the inflammatory response.

Wider implications of the findings

These findings support the hypothesis that the vaginal microbiota plays an important aetiological role in euploid miscarriage and may represent a target to modify the risk of pregnancy loss.

Trial registration number

n/a

How to use remote patient monitoring successfully in cardiac and pulmonary patients: a realist review

Funding Acknowledgements

Type of funding sources: Public hospital(s). Main funding source(s): Queensland Health

Background

Remote patient monitoring (RPM) is an underutilised telehealth intervention that can enhance self-management of cardiovascular and pulmonary disease and reduce acute care use. However, studies of effectiveness of RPM interventions vary widely. This study aimed to explain the variation in outcomes related to RPM interventions within cardiac and pulmonary populations. Specifically, we aimed to answer why some RPM interventions are more successful than others in reducing demand on acute care services.

Methods

In brief, search terms for remote monitoring and acute care utilisation were used across three electronic databases: PubMed, EMBASE and CINAHL. The search, conducted in October 2020, included articles published in the last five years (2015-2020). Articles were included if they used RPM to monitor an individual’s biometrics (e.g. heart rate, blood pressure) from a distance while they are not in hospital. Realist review methodology was used to enable exploration of how, why and for whom interventions do and do not work.  Outcomes were evaluated to determine contextual factors and potential mechanisms that led to variation in cardiac and pulmonary intervention outcomes.

Results

After screening, 91 articles met the eligibility criteria and were included. We found that across a broad range of RPM interventions 31 factors emerged that are likely to impact the effectiveness of cardiac and pulmonary RPM innovations. These were synthesised into six theories of intervention success: 1) targeting populations at high risk; 2) accurately detecting a decline in health; 3) providing responsive and timely care; 4) personalising care; 5) enhancing self-management and, 6) ensuring collaborative and coordinated care.

Conclusion

 While RPM interventions are complex, if they are designed with patients, providers and the implementation setting in mind and with the key variables identified within this review  incorporated, it is more likely that they will be effective at reducing acute hospital events.

Mental health and wellbeing coordinators in primary schools to support student mental health: protocol for a quasi-experimental cluster study

Background

Half of mental health disorders begin before the age of 14, highlighting the importance of prevention and early-intervention in childhood. Schools have been identified globally by policymakers as a platform to support good child mental health; however, the majority of the research is focused on secondary schools, with primary schools receiving very little attention by comparison. The limited available evidence on mental health initiatives in primary schools is hindered by a lack of rigorous evaluation. This quasi-experimental cluster study aims to examine the implementation and effectiveness of a Mental Health and Wellbeing Co-ordinator role designed to build mental health capacity within primary schools.

Methods

This is a primary (ages 5–12) school-based cluster quasi-experimental study in Victoria, Australia. Before baseline data collection, 16 schools selected by the state education department will be allocated to intervention, and another 16 matched schools will continue as ‘Business as Usual’. In intervention schools, a mental health and well-being coordinator will be recruited and trained, and three additional school staff will also be selected to receive components of the mental health training. Surveys will be completed by consenting staff (at 2-, 5-, 10- and 17-months post allocation) and by consenting parents/carers (at 3-, 10- and 17-months post allocation) in both intervention and business as usual schools. The primary objective is to assess the change in teacher’s confidence to support student mental health and wellbeing using the School Mental Health Self-Efficacy Teacher Survey. Secondary objectives are to assess the indirect impact on systemic factors (level of support, prioritisation of child mental health), parent and teachers’ mental health literacy (stigma, knowledge), care access (school engagement with community-based services), and student mental health outcomes. Implementation outcomes (feasibility, acceptability, and fidelity) and costs will also be evaluated.

Discussion

The current study will examine the implementation and effectiveness of having a trained Mental Health and Wellbeing Coordinator within primary schools. If the intervention increases teachers’ confidence to support student mental health and wellbeing and builds the capacity of primary schools it will improve student mental health provision and inform large-scale mental health service reform.

Trial registration

The trial was retrospectively registered in the Australian New Zealand Clinical Trials Registry (ANZCTR) on July 6, 2021. The registration number is ACTRN12621000873820.

Use of antibiotic coated intramedullary nails in open tibia fractures: A European medical resource use and cost-effectiveness analysis

PURPOSE

In patients with open tibial fractures, bone and wound infections are associated with an increased hospital length of stay and higher costs. The infection risk increases with the use of implants. Innovations to reduce this risk include antibiotic-coated implants. This study models whether the use of a gentamicin-coated intramedullary tibial nail is cost-effective for trauma centers managing patients with a high risk of infection.

EFFICACY

Absolute infection risk and relative risk reduction, by fracture grade, for antibiotic-coated nails compared to standard nails for patients with open tibial fractures were estimated based on the results of a meta-analysis, which assessed the additional benefit of locally-administered prophylactic antibiotics in open tibia fractures treated with implants. The observed efficacy of antibiotic-coated nails in reducing infections was applied in an economic model.

METHODS

The model compared infection rates, inpatient days, theatre usage and costs in high risk patients, with a Gustilo-Anderson (GA) grade III open fracture, for two patient cohorts from a trauma center perspective, with a 1-year time horizon. In one cohort all GAIII patients received a gentamicin-coated nail whilst GAI and GAII patients received a standard nail. All patients in the comparator cohort received a standard nail. Four European trauma centers provided patient-level data (n=193) on inpatient days, procedures and related costs for patients with and without infections.

RESULTS

Using the gentamicin-coated nail in patients at high risk of infection (GAIII) was associated with 75% lower rate of infection and cost savings (€477 - €3.263) for all included centers; the higher cost of the implant was offset by savings from fewer infections, inpatient days (-26%) and re-operations (-10%). This result was confirmed by extensive sensitivity analyses.

CONCLUSIONS

Analyses demonstrated that infection rates and total costs for in-hospital treatment could be potentially reduced by 75% and up to 15% respectively, by using a gentamicin-coated nail in patients at high risk of infection. Fewer infections, reduced inpatient days and re-operations may be potentially associated with use of antibiotic-coated implants. Results are sensitive to the underlying infection risk, with greatest efficacy and cost-savings when the coated implant is used in high risk patients.

Discrimination in the surgical discipline: an international European evaluation (DISDAIN)

Background

Negative workplace experiences (NWPEs), such as gender discrimination, bullying, sexual harassment and ethnic discrimination, are concerns in today’s surgical society. These negative experiences potentially impair surgeons’ performance and might impact patient care or outcomes negatively. This study aimed to assess the experience of NWPEs across the European surgical workforce.

Methods

A prospective online 34-point questionnaire was designed using a combination of Likert scale, multiple-choice and short-answer questions. Invitations were distributed through surgical associations via email/social media between 1 September and 15 November 2019. Data were analysed using non-parametric methods.

Results

Some 840 complete responses were included in the analysis. The distribution across genders and stage of surgical training was even. Of the respondents, 20 per cent (168 respondents) considered quitting their job, 4.5 per cent (38) took time off and 0.5% (4) left surgery due to NWPEs; 12.9 per cent of females and 4.4 per cent of males experienced some form of physical harassment. Females and those in training were significantly more likely to experience or witness gender discrimination and sexual harassment. Just over half of the respondents (448) did not report negative experiences, with most of these (375 respondents) being unaware of whom to report to. Nearly a fifth of respondents felt that NWPEs influenced patient care or outcomes negatively.

Conclusion

NWPEs were frequent, especially among females and those in training. While a substantial proportion of respondents experienced physical harassment, many individuals were unaware of how to raise concerns. Adverse effects on patient outcomes, surgical training and workforce retention indicate a need for urgent action.

Outcomes of biosynthetic absorbable mesh use in high risk CDC Class I ventral hernia repair: a single surgeon series

PURPOSE

Biosynthetic absorbable meshes have emerged as suitable alternatives to permanent synthetic and biologic meshes in complex ventral hernia repair in contaminated wounds. Evidence regarding the use of these products in clean wounds is currently scant. This paper presents a large single surgeon series using GORE^®BIO-A^® (W.L. Gore & Associates, Newark, DE) (Bio-A) tissue reinforcement in high risk patients with predominantly CDC Class I wounds.

METHODS

Retrospective review of a prospectively maintained database of consecutive patients who underwent open ventral hernia repair with biosynthetic absorbable mesh was conducted. Ventral Hernia Working Group (VHWG) classification based on patient demographics and Centers for Disease Control (CDC) wound type were collected prospectively. All patients were followed up for a minimum of 12 months post-operatively.

RESULTS

155 patients were included with a mean post-operative follow up of 29 months (range 12-62 months). Mean age was 61.8 years with an average BMI of 33.5 kg/m². 147 patients (94.9%) were classified as VHWG 2 or 3 based on comorbidities or surgical field contamination. 69% (n = 107) of wounds were designated CDC Class I. Mean hernia size was 119.7cm² with recurrent defects comprising 32.3% (n = 50). Retrorectus mesh repair was achieved in 84.5% of patients (n  = 131). Post-operative wound events occurred in 19.3%. No mesh was explanted. Hernia recurrence rate was 9.0% with a mean time to recurrence of 14 months. There was no significant difference in recurrence rates between clean and contaminated wounds.

CONCLUSION

This study supports the use of Bio-A in high risk ventral hernias, demonstrating a safe and durable repair across all wound classes. Ongoing follow-up continues to monitor for late complications and recurrence.

MO612THE ROLE OF MECHANICAL MUSCLE POWER IN PHYSICAL DYSFUNCTION: A MODEL FOR TAILORING RESISTANCE-BASED REHABILITATION IN CHRONIC KIDNEY DISEASE

Background and Aims

Individuals living with CKD are characterised by adverse changes in physical function. Knowledge of the factors that mediate impairments in physical functioning is crucial for developing effective interventions that preserve mobility and future independence. Mechanical muscle power describes the rate of performing work and is the product of muscular force and velocity of contraction. Muscle power has been shown to have stronger associations with functional limitations and mortality than sarcopenia in older adults. In CKD, the role of mechanical muscle power is poorly understood and is overlooked as a target in many rehabilitation programmes, often at the expense of muscle mass or strength. The aims of this study were to 1) explore the prevalence of low absolute mechanical power, low relative mechanical power, and low specific mechanical power in CKD; and 2) investigate the association of mechanical power with the ability to complete activities of daily living and physical performance.

Method

Mechanical muscle power (relative, allometric, specific) was calculated using the sit-to-stand-5 (STS5) test as per previously validated equations. Legs lean mass was derived from regional analyses conducted using bioelectrical impedance analysis (BIA). Physical performance was assessed using two objective tests: usual gait speed and the ‘time-up-and-go’ (TUAG) test. Self-reported activities of daily living (ADLs) were assessed via the Duke Activity Status Index (DASI). Balance and postural stability (postural sway and velocity) was assessed using a FysioMeter. Sex-specific tertiles were used to determine low, medium and high levels of relative STS power and its main components.

Results

102 participants with non-dialysis CKD were included (mean age: 62.0 (±14.1) years, n=49 males (48%), mean eGFR: 38.0 (±21.5) ml.min.1.73m2). The mean estimated relative power was 3.1 (±1.5) W.kg in females and 3.3 (±1.3) W.kg in males. Low relative power was found in 35/102 (34%) patients. Relative power was a significant independent predictor of self-reported ADLs (via the DASI) (B=.413, P=.004), and performance on the TUAG (B=-.719, P<.001) and gait speed (B=.404, P=.003) tests. Skeletal muscle mass was not associated with the DASI or any of the objective function tests

Conclusion

Patients presenting with low muscle power would benefit from participation in appropriate interventions designed to improve the physiological components accounting for low relative muscle power. Assessment of power can be used to tailor renal rehabilitation programmes as shown in Figure 1. Incorporation of power-based training, a novel type of strength training, designed by manipulating traditional strength training variables and primarily movement velocity and training intensity may present the best strategy for improving physical function in CKD.

FC 007CKD DERIVED MUSCLE CELLS RETAIN PHENOTYPIC CHARACTERISTICS OF UREIC SARCOPENIA: THE NEXT STEP IN CELLULAR MODELLING FOR THERAPEUTIC SCREENING

Background and Aims

Skeletal muscle wasting and dysfunction is a debilitating co-morbidity for people who suffer from kidney disease. To date research has sought to understand the mechanisms by which this occurs, in order to inform the prescription of required interventions in order to counteract such effects. Though progress has been made through in-vivo physiology research, the lack of an in-vitro translational model which replicates the phenotype noted in this patient group has hindered progression. The aim of the work presented was to systematically define a human derived skeletal muscle model with cells derived from people with kidney disease, in order to provide a test bed for the future screening of novel therapeutics and the investigation of the dynamic processes involved in the unwanted characteristics observed in this population.

Method

Skeletal muscle biopsies were taken from the vastus lateralis of non-dialysis dependent CKD patients (CKD; n=12) and Controls (CON; n=12), matched for age, sex, ethnicity and physical activity levels. Biopsy samples were subject to an enzymatic digestion method to enable the isolation of the muscle derived cells required for cellular experimentation. Once taken through the cell cycle, cells were plated into experimental wells and proliferated for 5 days or until confluent. Once confluent cells were differentiated through serum restriction to form mature myotubes (muscle fiber like structures) for a minimum of 7 days. Sampling time points were taken throughout to allow for the analysis of markers of proliferation, myogenic capacity, maturation, inflammation, protein synthesis and protein degradation. Further experiments were conducted on mature myotubes, where myotubes from both donor groups were exposed to either 0.4nM or 100nM of IGF-1 and p-Akt and protein synthesis quantified to investigate the presence of anabolic resistance in CKD derived cells.

Results

We report here that muscle cells derived from CKD patients have significantly higher levels of markers of proliferation (p = 0.041) and myogenic capacity (p = 0.034). Regarding myotube maturity, lower ratios of mature Myosin Heavy Chains were noted in CKD derived cells in comparison with CON derived cells (p = 0.012). On analysis of rates of protein synthesis and degradation in mature myotubes, no differences were noted in the rate of protein synthesis or the p-Akt in basal conditions (p > 0.05), however, significant elevations were noted in both protein degradation rates (p = 0.014) and the mRNA gene expression levels of E3-ligases (p = 0.016). On analysis of the experimentation investigating anabolic resistance, a degree of anabolic resistance was noted with inhibited p-Akt (p = 0.019) and protein synthesis (p ≤ 0.001) noted in cells derived from CKD cells in comparison to CON cells, when exposed to both doses of IGF-1.

Conclusion

Here we describe for the first time a human derived, disease specific model of uremic sarcopenia with many of the phenotypic traits noted in this population being maintained, such as elevated protein degradation and anabolic inhibition. This work not only provides a translational mechanistic insight into the cellular underpinnings of uremic sarcopenia but will allow for the future screening of novel therapeutics, in order manipulate the dynamic processes which lead to the debilitations noted in CKD populations.

MO1036DEVELOPMENT OF A DIGITAL SELF-MANAGEMENT EDUCATION PROGRAMME TO IMPROVE HEALTH BEHAVIOURS IN PEOPLE WITH NON-DIALYSIS CKD

Background and Aims

Appropriate disease and healthcare management are key behaviours for health optimisation in people with long-term conditions including CKD. Effective self-management of health requires appropriate knowledge, skills and confidence. Digital health interventions are potentially appealing tools to improve knowledge and self-management behaviours, as well as actively involving individuals in their healthcare, particularly in the post-COVID-19 era. However, the development strategies and processes behind such interventions are poorly defined. Here we describe the systematic development of a digital self-management programme for people living with non-dialysis CKD which includes novel approaches to improving self-management and health behaviours.

Method

Intervention mapping (IM) was used to guide the development of a digital self-management programme called ‘My Kidneys and Me’ (MK&M) to ensure that it can be implemented in clinical practice. The development process was guided by the first four steps of IM: (1) establish multidisciplinary and patient and public involvement (PPI) steering groups to describe the context of the intervention and programme goals; (2) identify objectives and determinants at early design stages to maintain a focus on the strategies adopted; (3) generate the programme components underpinned by appropriate psychological theories and models; (4) develop the programme content and describe the iterative process of refining the content and format of the digital programme for evaluation and implementation. The last two steps (adoption, implementation, and evaluation plan) will be evaluated alongside a forthcoming trial.

Results

A multidisciplinary steering group was formed consisting of 23 healthcare professionals, researchers, and digital health experts who provided expertise in the clinical and psychosocial aspects of CKD, self-management, digital health, and behaviour change research. A PPI steering group of 12 patients and family members identified the needs and priorities of MK&M, providing feedback at relevant time points.

As a result of previous literature and input from both steering groups, MK&M was developed with the aim to improve and maintain self-management behaviours, including to improve knowledge, promote self-care skill, increase self-efficacy, improve well-being, and increase physical activity. These target behaviours were translated into key programme goals: 1) increase patient activation; 2) reduce health risks; 3) manage symptoms; and 4) increase physical function.

Based on patient input and needs, MK&M was designed to comprise educational (Learn about …) and behaviour change (How to …) sessions, health trackers (e.g. blood pressure, weight, fruit and veg consumption), symptom tracker, exercise trackers, goal setting features, and social support. For example, to improve symptom management behaviours, patients can use MK&M to: 1) learn about symptoms associated with CKD and strategies to help manage these symptoms; 2) learn how to recognise and keep track of their symptoms so that they can modify their lifestyle accordingly and speak to their healthcare professional if needed; 3) track their symptoms using a bespoke tool.

Conclusion

Applying the IM framework enabled us to systematically use theory, empirical evidence, and practical perspectives in the development of MK&M. Our evidence- and theory-based online self-management programme provides ongoing support and guidance to people with CKD. The efficacy of MK&M to improve patient self-management behaviour is being studied in a multi-site RCT in the UK.

MO615SUPPORT FOR CHRONIC KIDNEY DISEASE PATIENTS DURING COVID-19: PERSPECTIVES FROM PATIENTS, FAMILY AND HEALTHCARE PROFESSIONALS

Background and Aims

Patients with non-dialysis chronic kidney disease (CKD patients) require specialised management, including routine clinical visits, laboratory measures, and medication adjustments. Inevitably, the COVID-19 pandemic has resulted in changes to delivery of care in a bid to prevent virus transmission in this clinically vulnerable group. The extent of the impact of any changes in support provision for patients is largely unknown. The study aimed to capture the views of CKD patients, family or other significant person in their lives (SO), and nephrology healthcare professionals (HCPs) on how patients’ healthcare needs were and could be supported during this time.

Method

CKD patients, their SO (e.g., family member, friend) and HCPs from 10 secondary care sites across England were invited to take part in a bespoke online survey, as part of the DIMENSION-KD portfolio adopted study. Participants responded to yes/no and free-text questions about their satisfaction with available healthcare support (CKD, SO) and patients’ need for additional support (CKD, SO, HCP). Thematic analysis was applied to the free-text responses.

Results

230 CKD patients (mean age 63.8, SD 13.8 years), 67 SO (74% spouses), and 59 HCP of various specialties completed the survey between August and December 2020. 84% of CKD participants felt they could get the support they needed. The most frequent explanation (25%) was that direct contact with a member of their renal team was available when needed. Other explanations included 1. being monitored by the renal team, 2. continuation of regular appointments and having additional treatment when necessary, 3. an accessible local General Practice (GP), and 4. a particularly “helpful” nephrologist or “good relationships” with their doctors. All SO felt the patient could get the help they required. Their explanations were in line with those of CKD patients, i.e., readily available contact and access to the renal team (25%), followed by good relationship or highly positive experience with member(s) of the renal team, regularity of contact/ appointments, and GP accessibility. When asked about additional healthcare information and support they would like, “none” was the most common response by CKD patients (28%), followed by the need for reliable information around COVID-19 and renal conditions, access to local GP, and a reliable point of contact when kidney condition deteriorates. Similarly, for many SO there was no need for additional support, whilst the most often suggested type of support was provision of reliable information on COVID-19 and renal health. For HCP, accessible service and guidance (36%) and psychosocial support for patients (25%) were most frequently cited types of additional support that would benefit patients.

Conclusion

An accessible point of contact for renal care and continuation of regular monitoring of some form emerged as key factors in CKD patient support across the three stakeholder groups. Some needs raised, such as limited access to GP, are relevant to local primary or secondary healthcare services, while practices adopted by some renal teams, such as a number for patients to ring when needed, seemed to offer reassurance and satisfaction among patients and their SO.

Patient-reported outcome measures (PROMs) use in post-stroke patient care and clinical practice: a realist synthesis protocol

BACKGROUND

There is growing interest in the use of routine patient-reported outcome measures (PROMs) to influence the care of individual patients with stroke. However, there are significant gaps in our understanding as to how PROMs influence post-stroke patient care and clinical practice. This is due to factors including the number of purported uses for PROMs and that PROMs are complex interventions, which attempt to stimulate varied actions or behaviours. Therefore, the objective of this realist synthesis is to offer theory-based explanations as to how PROMs influence post-stroke clinical practice and patient care.

METHODS

This is a protocol for a realist synthesis, which involves three distinct phases: theory building (phase 1), theory testing and refinement (phase 2) and synthesis (phase 3). Phase 1 will develop initial rough programme theories (IRPTs), through literature searches (from January 2000 onwards) of MEDLINE, EMBASE, PsycINFO, CINAHL, Cochrane Library and the grey literature. Only secondary sources will be included that contribute to the development of IRPTs. Only two IRPTs, prioritised by the stakeholder group, will be taken forward to be tested and refined during phase 2. Further novel searches will be employed in phase 2, utilising the same criteria as phase 1; however, phase 2 searches will not utilise grey literature searches, and only primary research studies that contribute to the refinement of programme theories under investigation will be included. Two independent reviewers will screen and select all returned results. The reviewers will code and annotate relevant sources, resulting in 'fragments' to be extracted and graded based on the richness of their contribution to explanation and causal insight. Further, these fragments will be organised into 'Context-Mechanism-Outcome' configurations. Phase 3 of the review will involve the synthesis of context-mechanism-outcome configurations to form middle-range theory-based explanations and developed logic models for stakeholders to understand how PROMs in post-stroke clinical practice and patient care work for whom, how and under what circumstances.

DISCUSSION

The resulting realist synthesis will provide guidance on the implementation of PROMs within routine post-stroke clinical practice and patient care and act as a touchstone for further testing and refinement of PROMs programmes.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42020138649 .

O15: DISRUPTION OF THE BLOOD-SPINAL CORD BARRIER PREDICTS PERMANENT PARAPLEGIA AFTER THORACOABDOMINAL AORTIC ANEURYSM REPAIR

Introduction

Paraplegia post-thoracoabdominal aortic aneurysm (TAAA) repair remains both a devastating and poorly understood complication. We related temporal changes in cellular and protein composition of cerebrospinal fluid (CSF) to neurological outcomes after TAAA repair to gain mechanistic insights driving paraplegia.

Method

Patients undergoing TAAA repair (open or endovascular) with a CSF drain were prospectively recruited between 2016-2018. CSF was collected pre-operatively and 24-hourly until removal. Daily neurological examinations were performed by blinded neurologists to the study. CSF cell content was characterised by flow cytometry and proteome analysed by tandem-mass-tag proteomics. An in-vivo rat model was modified using 15 minutes of aortic occlusion to produce consistent paraplegia. Rats were analysed neuro-behaviourally and histologically.

Result

CSF was analysed from 52 patients (age: 70.27+/-11.4; 66% male; open (n=9), endovascular (n=43)). 12 developed paraplegia of whom 5 remained permanently-paraplegic. Demographics were comparable between paraplegics, those who recovered and without post-op neurology. Permanent paraplegia was associated with a significant infiltration of CSF CD45+ leucocytes (P<0.0001). Levels of ADVS-1 was >3-fold higher in permanent-paraplegics CSF versus those who recovered (P=0.0008). ADVS-1 >15ng/ml predicted permanent paraplegia with 100% specificity. Pre-treatment with ADVS-1 inhibition significantly improved walking (<0.001) and increased astrocytic staining in the lateral corticospinal, reticulospinal and rubrospinal tracts versus controls (P=0.03, 0.04, 0.04 respectively).

Conclusion

Permanent paraplegia is associated with shedding of ADVS-1 from parenchymal cord into CSF and blood/spinal-cord barrier disruption leading to cord oedema/leucocyte infiltration. Pre-treatment with ADVS-1 inhibition led to neurobehavioural and histological improvements offering translational hope for this devastating complication.

Take-home message

ADVS-1 is a novel biomarker of paraplegia where accurate biomarkers have proven challenging but more importantly it has proven a therapeutic target with genuine translational potential.

Prospects for beyond the Standard Model physics searches at the Deep Underground Neutrino Experiment: DUNE Collaboration

The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for a variety of physics topics. The high-intensity proton beams provide a large neutrino flux, sampled by a near detector system consisting of a combination of capable precision detectors, and by the massive far detector system located deep underground. This configuration sets up DUNE as a machine for discovery, as it enables opportunities not only to perform precision neutrino measurements that may uncover deviations from the present three-flavor mixing paradigm, but also to discover new particles and unveil new interactions and symmetries beyond those predicted in the Standard Model (SM). Of the many potential beyond the Standard Model (BSM) topics DUNE will probe, this paper presents a selection of studies quantifying DUNE's sensitivities to sterile neutrino mixing, heavy neutral leptons, non-standard interactions, CPT symmetry violation, Lorentz invariance violation, neutrino trident production, dark matter from both beam induced and cosmogenic sources, baryon number violation, and other new physics topics that complement those at high-energy colliders and significantly extend the present reach.

Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm

We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g-2 Experiment for the positive muon magnetic anomaly a_{μ}≡(g_{μ}-2)/2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency ω_{a} between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nuclear magnetic resonance probes calibrated in terms of the equivalent proton spin precession frequency ω[over ˜]_{p}^{'} in a spherical water sample at 34.7 °C. The ratio ω_{a}/ω[over ˜]_{p}^{'}, together with known fundamental constants, determines a_{μ}(FNAL)=116 592 040(54)×10^{-11} (0.46 ppm). The result is 3.3 standard deviations greater than the standard model prediction and is in excellent agreement with the previous Brookhaven National Laboratory (BNL) E821 measurement. After combination with previous measurements of both μ^{+} and μ^{-}, the new experimental average of a_{μ}(Exp)=116 592 061(41)×10^{-11} (0.35 ppm) increases the tension between experiment and theory to 4.2 standard deviations.

Splenogonadal fusion: aiding detection and avoiding radical orchidectomy

Splenogonadal fusion is a rare benign congenital anomaly in which there is an abnormal connection between the gonad and the spleen. It was first described over 100 years ago with limited reports in the literature since then. Its similarity in presentation to testicular neoplasia poses a significant challenge in diagnosis and management, often resulting in radical orchidectomy. We present the case of a 31-year-old man who presented with a rapidly growing left-sided testicular mass and suspicious ultrasound findings; histology from the subsequent radical inguinal orchidectomy showed findings consistent with splenogonadal fusion. We describe points for consideration in the clinical history, examination and imaging that could suggest splenogonadal fusion, including preoperative technetium-99m-sulfur colloid imaging and intraoperative frozen section evaluation, which may confirm the diagnosis and prevent unnecessary orchidectomy.

Prevalence of early hip OA features on MRI in high-impact athletes. The femoroacetabular impingement and hip osteoarthritis cohort (FORCe) study

OBJECTIVE

To compare early hip osteoarthritis (OA) features on magnetic resonance imaging (MRI) in high-impact athletes with and without hip and/or groin pain, and to evaluate associations between early hip OA features, the International Hip Outcome Tool (iHOT33) and Copenhagen Hip and Groin Outcome Score (HAGOS).

DESIGN

This case-control study evaluated data of the femoroacetabular impingement and hip osteoarthritis cohort (FORCe). One hundred and eighty-two symptomatic (hip and/or groin pain >6 months and positive flexion-adduction-internal-rotation (FADIR) test) and 55 pain-free high-impact athletes (soccer or Australian football (AF)) without definite radiographic hip OA underwent hip MRI. The Scoring Hip Osteoarthritis with MRI (SHOMRI) method quantified and graded the severity of OA features. Each participant completed the iHOT33 and HAGOS.

RESULTS

Hip and/or groin pain was associated with higher total SHOMRI (0-96) (mean difference 1.4, 95% CI: 0.7-2.2), labral score (adjusted incidence rate ratio (aIRR) 1.33, 95% CI: 1.1-1.6). Differences in prevalence of cartilage defects, labral tears and paralabral cysts between symptomatic and pain-free participants were inconclusive. There was a lower prevalence of effusion-synovitis in symptomatic participants when compared to pain-free participants (adjusted odds ratio (aOR) 0.46 (95% CI: 0.3-0.8). Early hip OA features were not associated with iHOT33 or HAGOS.

CONCLUSIONS

A complex and poorly understood relationship exists between hip and/or groin pain and early hip OA features present on MRI in high-impact athletes without radiographic OA. Hip and/or groin pain was associated with higher SHOMRI and labral scores.

An international study of public contact with people who have an intellectual disability

BACKGROUND

People with intellectual disability (ID) are often socially isolated, and many experience stigma and discrimination. Increased contact with the general public is thought to overcome prejudices. This large-scale international study had three main aims: to determine the type and frequency of contact that the general public has with people with ID; to identify the personal characteristics of those who have greater contact; and to examine the public's level of comfort at the prospect of having contact with people with ID.

METHOD

Self-completed online questionnaires were administered to nationally representative panels of respondents in 17 countries; totally 24 504 persons. Multivariate analyses were used to identify respondents more likely to have had frequent personal contact with persons with ID from those with infrequent or no contact and those respondents who were most comfortable at meeting a person with ID.

RESULTS

Internationally around one in four of the general population reports having frequent personal contact with people who have an ID although this varied from 7% in Japan to 46% in Panama. The principal forms of contact were through friendships, neighbours or extended family members. Over all countries, volunteering and engagement with Special Olympics were the two main predictors of frequent personal contact followed by employment in the education, health or social care field, being a parent of children under 18 years, playing sports and being employed. People who reported frequent personal contact were also more comfortable at meeting a person with ID.

CONCLUSIONS

This international dataset provides a baseline against which public contact can be compared across countries and changes monitored over time. The findings suggest ways in which greater contact can be promoted and making the public more comfortable at meeting people with ID.

Rational design, synthesis and testing of novel tricyclic topoisomerase inhibitors for the treatment of bacterial infections part 1

The alarming reduction in drug effectiveness against bacterial infections has created an urgent need for the development of new antibacterial agents that circumvent bacterial resistance mechanisms. We report here a series of DNA gyrase and topoisomerase IV inhibitors that demonstrate potent activity against a range of Gram-positive and selected Gram-negative organisms, including clinically-relevant and drug-resistant strains. In part 1, we present a detailed structure activity relationship (SAR) analysis that led to the discovery of our previously disclosed compound, REDX05931, which has a minimum inhibitory concentration (MIC) of 0.06 μg mL^-1 against fluoroquinolone-resistant Staphylococcus aureus. Although in vitro hERG and CYP inhibition precluded further development, it validates a rational design approach to address this urgent unmet medical need and provides a scaffold for further optimisation, which is presented in part 2.

Rational design, synthesis and testing of novel tricyclic topoisomerase inhibitors for the treatment of bacterial infections part 2

Building on our previously-reported novel tricyclic topoisomerase inhibitors (NTTIs), we disclose the discovery of REDX07965, which has an MIC90 of 0.5 μg mL-1 against Staphylococcus aureus, favourable in vitro pharmacokinetic properties, selectivity versus human topoisomerase II and an acceptable toxicity profile. The results herein validate a rational design approach to address the urgent unmet medical need for novel antibiotics.

First Measurement of Differential Charged Current Quasielasticlike ν_{μ}-Argon Scattering Cross Sections with the MicroBooNE Detector

We report on the first measurement of flux-integrated single differential cross sections for charged-current (CC) muon neutrino (ν_{μ}) scattering on argon with a muon and a proton in the final state, ^{40}Ar (ν_{μ},μp)X. The measurement was carried out using the Booster Neutrino Beam at Fermi National Accelerator Laboratory and the MicroBooNE liquid argon time projection chamber detector with an exposure of 4.59×10^{19} protons on target. Events are selected to enhance the contribution of CC quasielastic (CCQE) interactions. The data are reported in terms of a total cross section as well as single differential cross sections in final state muon and proton kinematics. We measure the integrated per-nucleus CCQE-like cross section (i.e., for interactions leading to a muon, one proton, and no pions above detection threshold) of (4.93±0.76_{stat}±1.29_{sys})×10^{-38}  cm^{2}, in good agreement with theoretical calculations. The single differential cross sections are also in overall good agreement with theoretical predictions, except at very forward muon scattering angles that correspond to low-momentum-transfer events.