79 research outputs found

    Induction of strain-transcendent antibodies to placental-type isolates with VAR2CSA DBL3 or DBL5 recombinant proteins

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    <p>Abstract</p> <p>Background</p> <p>Pregnancy associated malaria is a severe clinical syndrome associated with sequestration of <it>Plasmodium falciparum</it>-infected erythrocytes in the placenta. Placental binding is mediated by VAR2CSA, which adheres to chondroitin sulphate A (CSA). VAR2CSA is a large and polymorphic protein that has six Duffy binding-like (DBL) domains. There is still limited understanding as to how effective individual VAR2CSA domains are at generating inhibitory antibodies or the number of domain variants needed for universal vaccine coverage.</p> <p>Methods</p> <p>To investigate the immunogenic properties of single domain VAR2CSA recombinant proteins, rats or rabbits were immunized with five of the six VAR2CSA domains produced in <it>Pichia pastoris</it>. Immune plasma was analysed against a geographically diverse panel of CSA-binding lab lines to assess antibody breadth and inhibitory activity.</p> <p>Results</p> <p>Of the five domains, DBL3, and to a lesser extent DBL5, induced antibodies that cross-reacted on five diverse CSA-binding parasite lines by flow cytometry. By comparison, anti-DBL6 antibodies were highly strain-specific and anti-DBL1 and anti-DBL4 antibodies were poorly reactive by flow cytometry. From this series of recombinant proteins, adhesion-blocking activity was restricted to a single rat immunized against a DBL4 recombinant protein.</p> <p>Conclusions</p> <p>Single domain VAR2CSA recombinant proteins produced in <it>P. pastoris </it>had limited efficacy in eliciting adhesion blocking antibody responses, but VAR2CSA DBL3 and DBL5 domains contain strain-transcendent epitopes that can be targeted by vaccination and may have application for vaccine development.</p

    Who should have a pre–discharge home assessment visit after a stroke? A qualitative study of occupational therapists' views

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    Introduction: The number of patients who have a pre-discharge home assessment visit following a stroke has been reported to vary nationally. The purpose of this research was to explore the factors influencing occupational therapists' decisions to complete such visits. Method: Semi-structured interviews were completed with 20 senior occupational therapists working with stroke in-patients, from a range of urban and rural locations in the United Kingdom. The interviews explored their views about those patients for whom a pre-discharge home assessment visit would and would not be required. The interviews were analysed using thematic analysis. Findings: Three themes were identified: the patient's level of physical, cognitive, or perceptual impairment and its impact on performance in activities of daily living; factors relating to the patient's home environment, including the availability of support within the home environment; and other influences on occupational therapists. The presence of a cognitive impairment was a particularly important factor. Conclusions: Occupational therapists balanced aspects from each of these themes in order to determine whether a visit was needed or not. Although the level of impairment was important, the most dependent patients were not necessarily those believed to be the most likely to need a visit

    Interventions to reduce dependency in personal activities of daily living in community-dwelling adults who use homecare services: protocol for a systematic review

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    Background There is a growing demand for services whereby individuals receive assistance from care workers for personal care within the home. This has led to the development of re-ablement or restorative homecare services that provide time-limited input aimed at reducing dependency in personal activities of daily living, and preventing or delaying the need for further homecare support. However, little is currently known about how such interventions are configured, or how they may affect individuals’ ability to carry out personal care independently. Methods/Design We will seek to identify studies that compare an intervention designed to reduce dependency in personal activities of daily living with routine input or usual care as the control. We will include randomised controlled trials, nonrandomised controlled trials, and controlled before and after studies. We will also include interrupted time series studies. We shall search electronic databases in addition to searching for ongoing and unpublished studies, and where appropriate will contact key authors. Two reviewers will independently screen articles for inclusion; will assess risk of bias using quality assessment tools; and will carry out data extraction using pre-prepared forms. Any disagreements, at any stage, will be resolved by discussion and the involvement of a third reviewer if needed. We will produce a narrative summary of the results. A meta-analysis will be conducted if sufficient data are available of appropriate quality and comparability. Discussion The findings from this review will inform future practice within homecare re-ablement services; will inform policy decisions about the structure, organisation and content of such services; and will identify areas where further research is warranted

    Occupational Therapy in HomEcare Re-ablement Services (OTHERS): results of a feasibility randomised controlled trial

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    Objectives: The objective of this study was to test the feasibility of conducting a randomised controlled trial (RCT) of an intervention targeted at activities of daily living (ADL), delivered by an occupational therapist, in homecare reablement. Design: Feasibility parallel group RCT. Setting: Single-site local authority homecare reablement service. Participants: People referred for homecare reablement with ability to consent. Exclusion criteria were as follows: inability to speak English, receiving other community therapy services, needing two or more to assist transfer and receiving end-of-life care. Control: ‘Usual care’ was 6 weeks of homecare reablement delivered by social care workers (no routine health professional input). Intervention: A targeted ADL programme, delivered by an occupational therapist incorporating goal setting, teaching/practising techniques, equipment/adaptations and provision of advice/support. This was in addition to usual care. Outcome measures: Aspects of feasibility including eligibility, recruitment, intervention delivery, attrition and suitability and sensitivity of outcome measures. Participant outcomes were personal and extended ADL, quality of life, falls and use of health and social care services. Results: 30 participants were recruited, 15 to each arm, which was 60% of those eligible. Data from 22 (73%) were analysed at 6 months. Of the 15 participants, 13 (86%) received the intervention and were able to set one or more ADL goals. There were improvements from baseline in both groups, although overall improvements were greater in the occupational therapy (OT) intervention group. The biggest threat to feasibility was a change in service configuration during the trial, involving additional occupational therapy input, affecting usual care and recruitment. Conclusions: Despite the service reconfiguration, it was feasible to recruit and retain participants, deliver the intervention and collect outcome data that were responsive to change. The choice of primary outcome measure remains unclear. A further powered study is feasible and warranted; however, the design will require careful consideration because of ongoing national changes in service configurations

    Occupational Therapy in HomEcare Re-ablement Services (OTHERS): study protocol for a randomized controlled trial

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    Background Homecare re-ablement services have been developed by local authorities in England in response to the government agenda for health and social care. These services aim to optimize users’ independence and ability to cope at home, and reduce the need for ongoing health and social care services. However, there is currently limited evidence and guidance regarding the optimum configuration and delivery of re-ablement services. In particular, the impact of occupational therapy input on service user outcomes has been highlighted as a specific research priority. Methods/Design This feasibility randomized controlled trial (RCT) will recruit 50 people from one local authority led homecare re-ablement service in England. Those who provide informed consent will be randomized to receive either usual homecare re-ablement (without routine occupational therapy input) or usual homecare re-ablement plus an enhanced program targeted at activities of daily living (ADL), delivered by an occupational therapist. The primary aim of this study is to assess the feasibility of conducting a further, powered study. The participant outcomes assessed will be independence in personal and extended ADL, health and social care-related quality of life, number of care support hours, falls, acute and residential admissions and use of health and social care services. These will be assessed at two weeks, three months and six months post-discharge from the re-ablement service. Discussion To our knowledge, this is the first RCT of occupational therapy in homecare re-ablement services. The results of this study will lay the foundations for a further powered study. The findings will be relevant to researchers, clinicians, commissioners and users of adult social care services

    What is a return to work after stroke?: 12 month work outcomes in a feasibility trial

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    Background: Return to work (RTW) is an outcome in determining the effectiveness of rehabilitation post-stroke. However, stroke survivors (SS) may return to different roles with altered work status. Income, hours, responsibilities and job-satisfaction may be reduced. SS may be dissatisfied if unable to resume apriori work status; alternatively adjusted work status may be viewed positively if perceived as a way of reducing the risk of another stroke. The purpose of this study was to explore what is meant by RTW. Method: Information about the nature of RTW (job type, hours, roles, responsibilities) was extracted from 3, 6 and 12 month follow-up postal questionnaires in 46 SS participants in a feasibility randomised controlled trial investigating effectiveness of a vocational rehabilitation intervention. Results/Findings: Participants took a mean 90 (SD:70, range 7-227) days to RTW. 19/46 reported working at 12 months. In 17 who supplied complete data, 7(41%) reported reduced working hours. Participants incurred a mean wage loss of 44% against pre-stroke earnings. 10/17(59%) participants were in the same job with the same employer and 6(35%) were working in different/modified jobs (1 missing:). 10/17(59%) had work-place adjustments. 18/46 (39%) participants were happy with their work situation. Discussion: Participants experienced marked changes in work status post-stroke, with implications for job-satisfaction, financial security and quality of life. Research into psychological adjustment following altered vocational status in SS is warranted. Conclusion: RTW is a complex outcome and may not translate to a return to pre-stroke vocational status. It is important to consider what constitutes a RTW following stroke

    Early, specialist vocational rehabilitation to facilitate return to work after traumatic brain injury: the FRESH feasibility RCT

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    Background Up to 160,000 people incur traumatic brain injury (TBI) each year in the UK. TBI can have profound effects on many areas of human functioning, including participation in work. There is limited evidence of the clinical effectiveness and cost-effectiveness of vocational rehabilitation (VR) after injury to promote early return to work (RTW) following TBI. Objective To assess the feasibility of a definitive, multicentre, randomised controlled trial (RCT) of the clinical effectiveness and cost-effectiveness of early, specialist VR plus usual care (UC) compared with UC alone on work retention 12 months post TBI. Design A multicentre, feasibility, parallel-group RCT with a feasibility economic evaluation and an embedded mixed-methods process evaluation. Randomisation was by remote computer-generated allocation. Setting Three NHS major trauma centres (MTCs) in England. Participants Adults with TBI admitted for > 48 hours and working or studying prior to injury. Interventions Early specialist TBI VR delivered by occupational therapists (OTs) in the community using a case co-ordination model. Main outcome measures Self-reported RTW 12 months post randomisation, mood, functional ability, participation, work self-efficacy, quality of life and work ability. Feasibility outcomes included recruitment and retention rates. Follow-up was by postal questionnaires in two centres and face to face in one centre. Those collecting data were blind to treatment allocation. Results Out of 102 target participants, 78 were recruited (39 randomised to each arm), representing 39% of those eligible and 5% of those screened. Approximately 2.2 patients were recruited per site per month. Of those, 56% had mild injuries, 18% had moderate injuries and 26% had severe injuries. A total of 32 out of 45 nominated carers were recruited. A total of 52 out of 78 (67%) TBI participants responded at 12 months (UC, n = 23; intervention, n = 29), completing 90% of the work questions; 21 out of 23 (91%) UC respondents and 20 out of 29 (69%) intervention participants returned to work at 12 months. Two participants disengaged from the intervention. Face-to-face follow-up was no more effective than postal follow-up. RTW was most strongly related to social participation and work self-efficacy. It is feasible to assess the cost-effectiveness of VR. Intervention was delivered as intended and valued by participants. Factors likely to affect a definitive trial include deploying experienced OTs, no clear TBI definition or TBI registers, and repatriation of more severe TBI from MTCs, affecting recruitment of those most likely to benefit/least likely to drop out. Limitations Target recruitment was not reached, but mechanisms to achieve this in future studies were identified. Retention was lower than expected, particularly in UC, potentially biasing estimates of the 12-month RTW rate. Conclusions This study met most feasibility objectives. The intervention was delivered with high fidelity. When objectives were not met, strategies to ensure feasibility of a full trial were identified. Future work should test two-stage recruitment and include resources to recruit from ‘spokes’. A broader measure covering work ability, self-efficacy and participation may be a more sensitive outcome. Trial registration Current Controlled Trials ISRCTN38581822. Funding This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 22, No. 33. See the NIHR Journals Library website for further project information

    The DRESS trial: a feasibility randomized controlled trial of a neuropsychological approach to dressing therapy for stroke inpatients

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    Objective: To investigate two approaches to treating patients with persistent dressing problems and cognitive difficulties following stroke. Design: Pilot randomized controlled trial. Setting: Inpatient stroke rehabilitation service. Subjects: Seventy consecutive stroke patients with persistent dressing problems and accompanying cognitive difficulties at two weeks after their stroke. Interventions: Patients were randomly allocated to six weeks of either a systematic neuropsychological approach, based on analysis of dressing problems and further cognitive testing, or to the control group who received conventional (functional) dressing practice. Both groups received treatment three times a week in accordance with two separately prepared manuals. Main measures: Nottingham Stroke Dressing Assessment (NSDA), Line Cancellation, 10-hole peg transfer test, Object Decision, Gesture Imitation. Patients were assessed at six weeks after randomization by an independent assessor masked to group allocation. Results: Both neuropsychological and functional groups improved performance on the NSDA over the treatment period (31% and 22%, respectively) but there was no significant difference between groups at six weeks. However, the neuropsychological group showed a significantly greater improvement on a line cancellation test of visual neglect (t(62) = 2.1, P < 0.05) and a planned subanalysis for those with right hemisphere damage showed a trend towards better dressing outcome (P = 0.07, one-tailed). Conclusions: Results demonstrate the potential benefits of a systematic neuropsychological approach to dressing therapy, particularly for patients with right hemisphere damage. This study suggests the need for a phase III study evaluating the efficacy of a systematic neuropsychological approach in treating dressing difficulties, targeting patients with right hemisphere stroke and visuospatial impairments
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