Applying PEOP to Develop an Intervention Framework for Employment in Parkinson's Disease

Employment intervention is essential for supporting people with Parkinson's disease (PwPD), who leave the workforce on average 5 years earlier than those without Parkinson's disease (PD). We developed a framework for occupational therapists (OTs) to address employment for PwPD. Our qualitative analysis employed data source triangulation of environmental scan of resources and publications, electronic medical records data, and focus groups with clinicians and PwPD. The framework underwent expert panel review by OTs and researchers who are knowledgeable of current evidence-based practices for PD. The framework is based on the Person-Environment-Occupation-Performance (PEOP) Model and PEOP Occupational Therapy Process and comprised of four parts: PEOP features of PD relevant to employment, performance changes experienced by PwPD, a process to evaluate and address employment, and intervention ideas. This framework serves as an impetus to explore evidence-based, scalable, proactive intervention approaches to address employment in PwPD.

Defining conditions for effective interdisciplinary care team communication in an open surgical intensive care unit: a qualitative study

OBJECTIVE

Poor interdisciplinary care team communication has been associated with increased mortality. The study aimed to define conditions for effective interdisciplinary care team communication.

DESIGN

An observational cross-sectional qualitative study.

SETTING

A surgical intensive care unit in a large, urban, academic referral medical centre.

PARTICIPANTS

A total 6 interviews and 10 focus groups from February to June 2021 (N=33) were performed. Interdisciplinary clinicians who cared for critically ill patients were interviewed. Participants included intensivist, transplant, colorectal, vascular, surgical oncology, trauma faculty surgeons (n=10); emergency medicine, surgery, gynaecology, radiology physicians-in-training (n=6), advanced practice providers (n=5), nurses (n=7), fellows (n=1) and subspecialist clinicians such as respiratory therapists, pharmacists and dieticians (n=4). Audiorecorded content of interviews and focus groups were deidentified and transcribed verbatim. The study team iteratively generated the codebook. All transcripts were independently coded by two team members.

PRIMARY OUTCOME

Conditions for effective interdisciplinary care team communication.

RESULTS

We identified five themes relating to conditions for effective interdisciplinary care team communication in our surgical intensive care unit setting: role definition, formal processes, informal communication pathways, hierarchical influences and psychological safety. Participants reported that clear role definition and standardised formal communication processes empowered clinicians to engage in discussions that mitigated hierarchy and facilitated psychological safety.

CONCLUSIONS

Standardising communication and creating defined roles in formal processes can promote effective interdisciplinary care team communication by fostering psychological safety.

Activity Monitoring in Parkinson Disease: A Qualitative Study of Implementation Determinants

BACKGROUND AND PURPOSE

There is interest in incorporating digital health technology in routine practice. We integrate multiple stakeholder perspectives to describe implementation determinants (barriers and facilitators) regarding digital health technology use to facilitate exercise behavior change for people with Parkinson disease in outpatient physical therapy.

METHODS

The purposeful sample included people with Parkinson disease (n = 13), outpatient physical therapists (n = 12), and advanced technology stakeholders including researchers and reimbursement specialists (n = 13). Semistructured interviews were used to elicit implementation determinants related to using digital health technology for activity monitoring and exercise behavior change. Deductive codes based on the Consolidated Framework for Implementation Research were used to describe implementation determinants.

RESULTS

Key implementation determinants were similar across stakeholder groups. Essential characteristics of digital health technology included design quality and packaging, adaptability, complexity, and cost. Implementation of digital health technology by physical therapists and people with Parkinson disease was influenced by their knowledge, attitudes, and varied confidence levels in using digital health technology. Inner setting organizational determinants included available resources and access to knowledge/information. Process determinants included device interoperability with medical record systems and workflow integration. Outer setting barriers included lack of external policies, regulations, and collaboration with device companies.

DISCUSSION AND CONCLUSIONS

Future implementation interventions should address key determinants, including required processes for how and when physical therapists instruct people with Parkinson disease on digital health technology, organizational readiness, workflow integration, and characteristics of physical therapists and people with Parkinson disease who may have ingrained beliefs regarding their ability and willingness to use digital health technology. Although site-specific barriers should be addressed, digital health technology knowledge translation tools tailored to individuals with varied confidence levels may be generalizable across clinics.Video Abstract available for more insights from the authors (see the Video, Supplemental Digital Content available at: http://links.lww.com/JNPT/A436 ).

Promoting Evidence-Based Practice: The Influence of Novel Structural Change to Accelerate Translational Rehabilitation

OBJECTIVE

To evaluate changes in clinicians' use of evidence-based practice (EBP), openness toward EBP, and their acceptance of organizational changes after a rehabilitation hospital transitioned to a new facility designed to accelerate clinician-researcher collaborations.

DESIGN

Three repeated surveys of clinicians before, 7-9 months, and 2.5 years after transition to the new facility.

SETTING

Inpatient rehabilitation hospital.

PARTICIPANTS

Physicians, nurses, therapists, and other health care professionals (n=410, 442, and 448 respondents at Times 1, 2, and 3, respectively).

INTERVENTIONS

Implementation of physical (architecture, design) and team-focused (champions, leaders, incentives) changes in a new model of care to promote clinician-researcher collaborations.

MAIN OUTCOME MEASURES

Adapted versions of the Evidence-Based Practice Questionnaire (EBPQ), the Evidence-Based Practice Attitudes Scale (EBPAS), and the Organizational Change Recipients' Beliefs Scale (OCRBS) were used. Open-ended survey questions were analyzed through exploratory content analysis.

RESULTS

Response rates at Times 1, 2, and 3 were 67% (n=410), 69% (n=422), and 71% (n=448), respectively. After accounting for familiarity with the model of care, there was greater reported use of EBP at Time 3 compared with Time 2 (adjusted meant2=3.51, standard error (SE)=0.05; adj. meant3=3.64, SE=0.05; P=.043). Attitudes toward EBPs were similar over time. Acceptance of the new model of care was lower at Time 2 compared with Time 1, but rebounded at Time 3 (adjusted meant1=3.44, SE=0.04; adj. meant2=3.19, SE=0.04; P<.0001; adj. meant3=3.51, SE=0.04; P<.0001). Analysis of open-ended responses suggested that clinicians' optimism for the model of care was greater over time, but continued quality improvement should focus on cultivating communication between clinicians and researchers.

CONCLUSIONS

Accelerating clinician-researcher collaborations in a rehabilitation setting requires sustained effort for successful implementation beyond novel physical changes. Organizations must be responsive to clinicians' changing concerns to adapt and sustain a collaborative translational medicine model and allow sufficient time, probably years, for such transitions to occur.

Racial and Ethnic Differences in Health-Related Quality of Life for Individuals With Parkinson Disease Across Centers of Excellence

BACKGROUND AND OBJECTIVES

Racial and ethnic minorities have been underrepresented in Parkinson disease (PD) research, limiting our understanding of treatments and outcomes across all non-White groups. The goal of this research is to investigate variability in health-related quality of life (HRQoL) and other outcomes in patients with PD across different races and ethnicities.

METHODS

This was a retrospective, cross-sectional and longitudinal, cohort study of individuals evaluated at PD Centers of Excellence. A multivariable regression analysis adjusted for sex, age, disease duration, Hoehn and Yahr (H&Y) stage, comorbidities, and cognitive score was used to investigate differences between racial and ethnic groups. A multivariable regression with skewed-t errors was performed to assess the individual contribution of each variable to the association of 39-item PD Questionnaire (PDQ-39) with race and ethnicity.

RESULTS

A total of 8,514 participants had at least 1 recorded visit. Most of them (90.2%) self-identified as White (n = 7,687), followed by 5.81% Hispanic (n = 495), 2% Asians (n = 170), and 1.9% African American (n = 162). After adjustment, total PDQ-39 scores were significantly higher (worse) in African Americans (28.56), Hispanics (26.62), and Asians (25.43) when compared with those in White patients (22.73, p < 0.001). This difference was also significant in most PDQ-39 subscales. In the longitudinal analysis, the inclusion of cognitive scores significantly decreased the strength of association of the PDQ-39 and race/ethnicity for minority groups. A mediation analysis demonstrated that cognition partially mediated the association between race/ethnicity and PDQ-39 scores (proportion mediated 0.251, p < 0.001).

DISCUSSION

There were differences in PD outcomes across racial and ethnic groups, even after adjustment for sex, disease duration, HY stage, age, and some comorbid conditions. Most notably, there was worse HRQoL among non-White patients when compared with White patients, which was partially explained by cognitive scores. The underlying reason for these differences needs to be a focus of future research.

255 THE ROLE OF GERIATRIC MEDICINE IN CARE OF OLDER ADULTS WITH MAJOR TRAUMA

Background

In recent Major Trauma Audit Reports the most common cause of major trauma is low falls, 46-49% of injured patients were aged over 65. These are an important group to identify and to prioritise for geriatrician led MDT care. There is currently no specialist geriatric medicine service in Ireland for older adults with major trauma. We aimed to evaluate patients with major trauma currently co-managed by orthopaedic surgery and geriatric medicine, the role of geriatric medicine and the potential role of a major trauma geriatric service.

Methods

We reviewed local data collected for the Irish Hip Fracture Database to examine the incidence of major trauma presenting in older adults and the role of geriatric medicine. We included patients who had injuries in addition to hip fracture including radius, ulna, clavicle, humerus, rib, vertebra, pelvis fracture subdural haemorrhage, diffuse brain injury and traumatic subarachnoid haemorrhage.

Results

In 2020, there were 437 older adults admitted with hip fractures and likely 2185 patients presenting with fragility fractures. We identified 32(7%) patients who sustained other major injuries in addition to hip fracture. Nationally, these patients have a higher in-hospital mortality (11% v 5%). All of these patients had comprehensive geriatric assessment (CGA) and geriatrician-led MDT care. These patients are at high risk for poorer outcomes; delirium, pressure ulcers, hospital acquired infection and disability, prolonged length of stay, delayed transfers of care, premature institutionalisation and death.

Conclusion

There is a role for expansion of proactive early identification and geriatric medicine input for all older adults with major trauma, in addition to those with hip fractures and other injuries. The increased mortality in these patients has not previously been published. International evidence supports early intervention from a specialist geriatric medicine service, with CGA to provide exceptional, continuous and co-ordinated care.

256 THE DEVELOPMENT OF A PATIENT AND CARER INFORMATION LEAFLET FOR PATIENTS FOLLOWING HIP FRACTURE

Background

Consistent delivery of high-quality information to family and caregivers can significantly improve patient experience and care during and after hospital admission. This became especially important with limited visiting hours during the COVID pandemic and our unit noted the need for appropriate written information. We aimed to complete a search of available resources nationally and internationally and develop our own information pack for distribution to our patients.

Methods

Literature search was conducted for available patient and carer information resources nationally and internationally including grey literature search. Key areas and patient priorities were identified. We then began developing a patient information booklet for distribution in our unit.

Results

We identified several key areas to be included in our information pack including what to expect during the hospital admission. This included pre-operative care, operative management, post-operative care especially delirium, pain, nutrition and continence promotion. Information regarding post-discharge care including off-site rehabilitation, rehabilitation at home and future actions including bone health and falls prevention interventions with home modification advice was also included. We developed a patient and caregiver information leaflet for our unit using data from the Irish Hip Fracture Database and our local unit practices and pathways to ensure information was relevant to our patients.

Conclusion

We completed the design of a patient and caregiver information leaflet highlighting important aspects of care post hip fracture in our unit.

Dysphagia Characteristics of Patients Post SARS-CoV-2 During Inpatient Rehabilitation

OBJECTIVE

To investigate dysphagia in patients recovering from SARS-CoV-2 admitted to acute inpatient rehabilitation by summarizing clinical swallow evaluation and videofluoroscopic swallow study findings.

DESIGN

Retrospective cohort study.

SETTING

Urban inpatient rehabilitation hospital.

PARTICIPANTS

The first inpatients admitted with SARS-CoV-2 (N=40) who participated in a videofluoroscopic swallow study.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Patient characteristics upon admission (duration of intubation, tracheostomy status, comorbidities, videofluoroscopic swallow study (VFSS) completion at previous level of care); admission International Dysphagia Diet level (IDDSI); Mann Assessment of Swallowing Ability (MASA), Functional Oral Intake Scale (FOIS), dysphagia severity rating; penetration aspiration scale (PAS) rated during VFSS; and IDDSI level recommended after completion of VFSS.

RESULTS

Twenty percent of patients had been evaluated by videofluoroscopy in acute care. Nineteen of 37 (51%) individuals were upgraded to IDDSI level 7 regular diet with level 0 thin liquids and achieved a FOIS of 7 after the completion of the VFSS. Five individuals (13%) received a diet downgrade or remained on the same diet recommendations from their admission. Total numerical score (TNS) of less than 170 on the MASA predicted presence of aspiration in 27% of patients (6 of 22). Seventy-two percent of the sample (16 of 22) had a TNS less than 170 but did not demonstrate any instances of aspiration. The odds of patients having a PAS of 3 or greater increased by approximately 15% (odds ratio, 1.15; 95% confidence interval, 1.03-1.27; P=.013). Thus, with each additional day of intubation during acute care stay, there was a 15% greater likelihood of having airway invasion.

CONCLUSIONS

Instrumental swallow evaluations are imperative to diagnose and treat dysphagia in the post-coronavirus disease population. Because of the heterogeneity of this population, high incidence of prolonged intubation, and limitations of the clinical swallowing evaluation, instrumental assessments need to be performed on a more consistent basis as infection prevention protocols evolve.

Physical Therapist Management of Parkinson Disease: A Clinical Practice Guideline From the American Physical Therapy Association

A clinical practice guideline on Parkinson disease was developed by an American Physical Therapy Association volunteer guideline development group that consisted of physical therapists and a neurologist. The guideline was based on systematic reviews of current scientific and clinical information and accepted approaches for management of Parkinson disease. The Spanish version of this clinical practice guideline is available as a supplement (Suppl. Appendix 1).

Dopaminergic Therapy for Motor Symptoms in Early Parkinson Disease Practice Guideline Summary: A Report of the AAN Guideline Subcommittee

BACKGROUND AND OBJECTIVES

To review the current evidence on the options available for initiating dopaminergic treatment of motor symptoms in early-stage Parkinson disease and provide recommendations to clinicians.

METHODS

A multidisciplinary panel developed practice recommendations, integrating findings from a systematic review and following an Institute of Medicine-compliant process to ensure transparency and patient engagement. Recommendations were supported by structured rationales, integrating evidence from the systematic review, related evidence, principles of care, and inferences from evidence.

RESULTS

Initial treatment with levodopa provides superior motor benefit compared to treatment with dopamine agonists, whereas levodopa is more likely than dopamine agonists to cause dyskinesia. The comparison of different formulations of dopamine agonists yielded little evidence that any one formulation or method of administration is superior. Long-acting forms of levodopa and levodopa with entacapone do not appear to differ in efficacy from immediate-release levodopa for motor symptoms in early disease. There is a higher risk of impulse control disorders associated with the use of dopamine agonists than levodopa. Recommendations on initial therapy for motor symptoms are provided to assist the clinician and patient in choosing between treatment options and to guide counseling, prescribing, and monitoring of efficacy and safety.

High satisfaction and improved quality of life with Rock Steady Boxing in Parkinson's disease: results of a large-scale survey

PURPOSE

To compare demographics, self-reported symptom burden, Health-Related Quality of Life (HRQL), and Self-Efficacy for Exercise (SEE) between participants and non-participants of Rock Steady Boxing (RSB), a non-contact boxing program for individuals with Parkinson's disease (PD) that focuses on agility, balance, and speed training.

MATERIALS AND METHODS

Adults with PD who had heard of RSB completed a 20 min, 61-question electronic survey including the Parkinson's Disease Questionnaire-39 (PDQ-39) and the Self-Efficacy for Exercise (SEE) scale. Differences between participants and never-participants were analyzed using chi-squared test, fisher's exact test and Wilcoxon test.

RESULTS

Of 2054 individuals enrolled in the survey, 1709 were eligible for analysis. 1333 were current participants, 166 previous-participants, and 210 never-participants. RSB participants were median age 69, 59% male, and 97% Caucasian. The majority of current participants reported that RSB improved their social life (70%), fatigue (63%), fear of falling (62%), depression (60%), and anxiety (59%). Compared to previous and never-participants, current participants had better median PDQ-39 scores (36 and 32 vs 25, p < 0.01) and SEE scores (43 and 48 vs 54, p < 0.01).

CONCLUSIONS

This is the largest survey of RSB use in PD. RSB participants report improvement in non-motor impairments and have significantly better HRQL and ESE compared to never-participants.IMPLICATIONS FOR REHABILITATIONParkinson's disease (PD) is a slowly progressive neurodegenerative condition that affects motor function and subsequently, quality of life.Exercise is increasingly recognized as an important treatment for motor and non-motor symptoms of PD.Rock Steady Boxing (RSB) is a specific non-contact boxing program for PD that is growing and increasing in popularity, though there is limited data on its effect on PD symptoms and quality of life.

Employment Resources for People with Parkinson's Disease: A Resource Review and Needs Assessment

Purpose People with Parkinson's disease (PwP) exit the workforce on average 5 years earlier than people without Parkinson's due to motor, cognitive, communicative, and affective symptoms. Decreased employment results in significant individual and societal costs. The objectives of this study were to identify strengths and weaknesses of employment resources and assess the needs of consumer and clinical stakeholders to improve job retention. Methods The study used a qualitative content analysis and Quasi Needs Assessment Framework. Sixteen PwP and 10 clinician stakeholders participated in two rounds of stakeholder discussion panels. Main outcomes included (1) the resources identified through the online content search and themes derived from those resources, and (2) the information gained from discussion panels and themes derived from their conversations. Results Literature review and online searches yielded 59 resources (30 consumer-focused documents, 17 peer-reviewed articles, and 12 documents supplied by key informants who are experts in Parkinson's disease and/or employment). Themes frequently found in the consumer-focused content but not the peer-reviewed literature included diagnosis disclosure decision-making, the benefits of retiring compared to working, and workplace accommodations. Stakeholders identified three key needs with regard to employment-related support for PwP: (1) knowledge about employment support options; (2) a clinician to start the discussion about employment challenges; and (3) an individualized and flexible approach to employment-related interventions. Conclusions Many people with Parkinson's experience unmet employment-related resource and process needs. An individually-tailored interdisciplinary intervention care path could facilitate decisions regarding disclosure and accommodations.

Variations in hospitalization rates across Parkinson's Foundation Centers of Excellence

INTRODUCTION

Patients with Parkinson's disease (PD) are at increased risk for hospitalization and often experience worsening of PD when hospitalized. It is therefore important to identify strategies to prevent hospitalization.

METHODS

Hospital encounter rates in different Parkinson's Foundation Centers of Excellence in United States, Canada, Israel and the Netherlands were analyzed as part of the Parkinson Foundation Parkinson's Outcomes Project (PF-POP). Multivariate logistic regression was used to estimate the odds ratio for hospitalization, adjusted for risk factors.

RESULTS

Baseline age, disease duration, other relative than spouse/partner as care giver, cancer, arthritis, other comorbidities, falls, use of levodopa, use of dopamine agonist, use of COMT inhibitor, occupational therapy before the baseline visit, PDQ-39, MSCI total score and time between visits were significantly associated with the risk of hospital encounters. After adjustment for these factors, two centers had significantly lower odds for hospitalization admission and ER visit (minimum OR 0.3) and four centers had significantly higher odds (maximum OR 1.5) than the average center. Four centers had significantly lower hazard ratios for time to re-hospitalization compared to the average center. Reducing hospital admission rates in those centers with higher than average rates would reduce overall hospitalizations by 11%. Applied to PD patients over 65 nationwide this represents a potential for cost savings of greater than $1 billion over 48 months.

CONCLUSION

Encounter rates vary even across expert centers and suggest that practices carried out in some centers may reduce the risk of hospitalization. Further research will be necessary to identify these practices and implement them more widely to improve care for people with PD.

Evaluation of an Interdisciplinary Screening Program for People With Parkinson Disease and Movement Disorders

OBJECTIVE

To describe the characteristics of people with Parkinson disease and movement disorders (PDMDs) referred by neurologist to a physiatrist-led interdisciplinary rehabilitation screening program.

DESIGN

Retrospective data analysis of electronic health records (EMRs).

SETTING

Outpatient PDMD neurology clinic and an interdisciplinary rehabilitation hospital's PDMD screening program.

PARTICIPANTS

People with PDMDs referred by neurologists to the interdisciplinary rehabilitation screening program from 2009-2017 (n=934), with early referrals from 2009-2015 (n=449) and recently referred from 2015-2017 (n=485), and patients who had new interdisciplinary rehabilitation screening program evaluations from 2015-2017 (n=183).

INTERVENTION

Participation in the physiatrist-led PDMD screening clinic.

MAIN OUTCOME MEASURES

Demographics, disease-related features, timed Up and Go, conversational voice volume, recommended therapy services, and number of therapies completed 90 days following interdisciplinary rehabilitation screening program.

RESULTS

People referred from the neurologists to the interdisciplinary rehabilitation screening program from 2009-2017 were 72±12.9 years old, male (56%), white (65%), and with 1 or more comorbidities (62%). Compared with early referrals from 2009-2015, more recently referred participants from 2015-2017 were younger (P<.001) and earlier in disease duration (P=.036). The interdisciplinary rehabilitation screening program participants from 2015-2017 had mean timed Up and Go time of 15.4±10.1 seconds and a mean conversational voice volume of 68.98±4.7 dB.

CONCLUSIONS

The interdisciplinary rehabilitation screening program was sustained with increased number of referrals over time, occurring earlier in the disease in more recent years. Key strategies used to sustain the program over time include development of a unique referral order set for the neurologists, implementation of a comprehensive screen tool in the rehabilitation hospital EMR, and centralized communication through social workers at both facilities.

Counselling in Primary Care – A General Practitioner’s Perspective

Introduction Counselling in Primary care (CIPC) is a new service introduced by the HSE in 2013, providing short-term counselling for medical-card holders, suffering from mild to moderate mental health problems. Aims To explore GP’s views on CIPC for the treatment of mild to moderate mental health disorders. Methods Qualitative semi-structured interviews were conducted with GPs who had previously utilized the CIPC service in the Cork/ Kerry region. Forty GPs were identi􀂡ed and sent invitation letters. GPs were purposefully sampled based on criteria of location (urban/rural), gender, practice size (single handed/group) and length of time quali􀂡ed. A total sample size was generated using the ‘ten plus three’ method. Interviews were carried out in person, transcribed verbatim and analyzed using the framework analysis method. Results Nineteen GPs were interviewed. Core themes emerged and were analyzed. 1. GPs unanimously agreed that CIPC has been of bene􀂡t in treating mild to moderate mental health disorders. 2. Suggested improvements to the service were made, including allowing GP visit card holders to avail of the service (n=10) and adolescents aged between 16 and 18 (n=5). 3. A majority (n=12) of GPs interviewed expressed the opinion that a combination of talk therapy and medication was associated with the best outcomes in treating mild to moderate mental health disorders. Conclusion CIPC seems to improve mental health services at a primary care level. While improvements can certainly be made to the service, GPs report positive patient outcomes and a reduction in psychiatric referrals for patients who can be suitably managed within the community.

Hemiarthroplasty compared with total hip arthroplasty in fractured neck of femur: a shift in national practice?

INTRODUCTION

The aim of this study was to determine the trends in national practice regarding total hip arthroplasty compared with hemiarthroplasty in fractured neck of femur between 2010 and 2016.

MATERIALS AND METHODS

A retrospective review was conducted of NHS Digital data (England) between 2010 and 2016. 'Emergency' neck of femur fracture admissions, hemiarthroplasties and total hip arthroplasties were included. Elective total hip arthroplasties, revisions and prostheses relocations were excluded. Annual percentages for each operation were calculated. Trends were tabulated and displayed graphically for analysis.

RESULTS

The total number of emergency neck of femur diagnoses was 257,789. Total hip arthroplasty was performed in 2217, 2737, 3305, 3686, 3670 and 3825 patients and hemiarthroplasty was performed in 21,335, 21,744, 21,115, 21,798, 21,804 and 22,163 patients for each year between 2011 and 2016, respectively. The rate of change for total hip arthroplasty slowed from 24.54% increase/year (2011-2013) to 5.24% increase/year (2013-2016). Uncemented arthroplasties decreased over the same time period.

DISCUSSION

Increasing numbers of total hip arthroplasties are conducted for hip fractures; however, this trend has slowed since 2013. Possible explanations include all eligible fractures being treated with total hip arthroplasty, trauma surgeon preference for hemiarthroplasty due to lower surgical specialism or publication of individual surgeon data (National Joint Registry) which may lead to surgeons favouring hemiarthroplasties which have a lower complication rate compared to elective total hip arthroplasties.

Identification of a ZEB2-MITF-ZEB1 transcriptional network that controls melanogenesis and melanoma progression

Deregulation of signaling pathways that control differentiation, expansion and migration of neural crest-derived melanoblasts during normal development contributes also to melanoma progression and metastasis. Although several epithelial-to-mesenchymal (EMT) transcription factors, such as zinc finger E-box binding protein 1 (ZEB1) and ZEB2, have been implicated in neural crest cell biology, little is known about their role in melanocyte homeostasis and melanoma. Here we show that mice lacking Zeb2 in the melanocyte lineage exhibit a melanoblast migration defect and, unexpectedly, a severe melanocyte differentiation defect. Loss of Zeb2 in the melanocyte lineage results in a downregulation of the Microphthalmia-associated transcription factor (Mitf) and melanocyte differentiation markers concomitant with an upregulation of Zeb1. We identify a transcriptional signaling network in which the EMT transcription factor ZEB2 regulates MITF levels to control melanocyte differentiation. Moreover, our data are also relevant for human melanomagenesis as loss of ZEB2 expression is associated with reduced patient survival.

A novel cable-driven robotic training improves locomotor function in individuals post-stroke

A novel cable-driven robotic gait training system has been tested to improve the locomotor function in individuals post stroke. Seven subjects with chronic stroke were recruited to participate in this 6 weeks robot-assisted treadmill training paradigm. A controlled assistance force was applied to the paretic leg at the ankle through a cable-driven robotic system. The force was applied from late stance to mid-swing during treadmill training. Body weight support was provided as necessary to prevent knee buckling or toe drag. Subjects were trained 3 times a week for 6 weeks. Overground gait speed, 6 minute walking distance, and balance were evaluated at pre, post 6 weeks robotic training, and at 8 weeks follow up. Significant improvements in gait speed and 6 minute walking distance were obtained following robotic treadmill training through a cable-driven robotic system. Results from this study indicate that it is feasible to improve the locomotor function in individuals post stroke through a flexible cable-driven robot.

Functional and prognostic relevance of the homeobox protein MSX2 in malignant melanoma

Background:

The homeobox containing transcription factor MSX2 is a key regulator of embryonic development and has been implicated to have a role in breast and pancreatic cancer.

Methods:

Using a selection of two- and three-dimensional in vitro assays and tissue microarrays (TMAs), the clinical and functional relevance of MSX2 in malignant melanoma was explored. A doxycyline-inducible over-expression system was applied to study the relevance of MSX2 in vitro. For TMA construction, tumour material from 218 melanoma patients was used.

Results:

Ectopic expression of MSX2 resulted in the induction of apoptosis and reduced the invasive capacity of melanoma cells in three-dimensional culture. MSX2 over-expression was shown to affect several signalling pathways associated with cell invasion and survival. Downregulation of N-Cadherin, induction of p21 and inhibition of both BCL2 and Survivin were observed. Cytoplasmic MSX2 expression was found to correlate significantly with increased recurrence-free survival (P=0.008). Nuclear expression of MSX2 did not result in significant survival correlations, suggesting that the beneficial effect of MSX2 may be independent of its DNA binding activity.

Conclusions:

MSX2 may be an important regulator of melanoma cell invasion and survival. Cytoplasmic expression of the protein was identified as biomarker for good prognosis in malignant melanoma patients.

No significant effect of uridine or pravastatin treatment for HIV lipoatrophy in men who have ceased thymidine analogue nucleoside reverse transcriptase inhibitor therapy: a randomized trial

BACKGROUND

Lipoatrophy can complicate thymidine analogue nucleoside reverse transcriptase inhibitor (tNRTI)-based antiretroviral therapy (ART). Lipoatrophy may be less likely with ART including ritonavir-boosted lopinavir (LPV/r). Small, placebo-controlled studies found that uridine (in tNRTI recipients) and pravastatin improved HIV lipoatrophy over 12 weeks. Today, most patients with lipoatrophy receive non-tNRTI-based ART; the effect of uridine in such patients is unknown.

METHODS

We performed a prospective, randomized trial in lipoatrophic adults with plasma HIV RNA<50 HIV-1 RNA copies/mL on tNRTI-sparing ART including LPV/r. Patients received uridine [36 g three times a day (tid) on 10 consecutive days per month; n=10], pravastatin [40 mg every night (nocte); n=12], uridine plus pravastatin (n=11) or neither (n=12) for 24 weeks. The primary endpoint was mean change in limb fat mass as assessed by dual-energy X-ray absorptiometry (DEXA). With 20 patients per intervention, the study had 80% power to detect a mean difference between a treatment and the control of 0.5 kg, assuming a standard deviation of 0.9 and an alpha threshold equal to 5% (two-sided).

RESULTS

Of 45 participants (all men, with median age 49.5 years and median limb fat 2.6 kg), two discontinued pravastatin and one participant stopped both pravastatin and uridine. The difference between the mean changes in limb fat mass for uridine vs. no uridine was 0.03 kg [95% confidence interval (CI) -0.35, +0.28; P=0.79]. The respective difference for pravastatin was -0.03 kg (95% CI -0.29, +0.34; P=0.84). Pravastatin slightly decreased total cholesterol (0.44 mmol/L; P=0.099). Visceral adipose tissue measured by computed tomography did not change significantly.

CONCLUSION

In this population and at the doses used, neither uridine nor pravastatin for 24 weeks significantly increased limb fat mass.

Protein tyrosine phosphatase genes downregulated in melanoma

Phospho-tyrosine levels are increased in melanoma, apparently consistent with reports of elevated protein tyrosine kinase activity. Some protein tyrosine kinases are encoded by oncogenes and have been implicated in melanoma genesis. Decreased protein tyrosine phosphatase activity may also increase phospho-tyrosine. Protein tyrosine phosphatase genes are candidate tumor suppressors and loss of expression may contribute to melanoma genesis. Here we survey protein tyrosine phosphatase expression in pigment cells. Protein tyrosine phosphatase genes were cloned by reverse transcriptase polymerase chain reaction using degenerate primers based upon conserved sequences within the phosphatase catalytic domain. Reaction products were cloned and sequenced: 118 and 113 partial protein tyrosine phosphatase products were isolated from normal melanocytes and melanoma cells, respectively. Northern blotting analysis was used to study expression of 15 protein tyrosine phosphatase genes. Expression of PTP-kappa and PTP-pi was absent or downregulated in more than 20% of melanoma cell lines and in some unmanipulated melanoma biopsies. These closely related enzymes are members of the 2B receptor protein tyrosine phosphatase family previously implicated in contact inhibition. Loss of protein tyrosine phosphatase expression may contribute to the abnormal tyrosine phosphorylation seen in melanoma; these genes are candidate tumor suppressors.

An open-label study of the role of adjuvant hemostatic support with protein C replacement therapy in purpura fulminans-associated meningococcemia

Activated protein C (APC) is a natural anticoagulant that plays a pivotal role in coagulation homeostasis. Severe inherited or acquired deficiency results in a clinical syndrome called purpura fulminans. In addition, APC also appears to have potent cytokine-modifying properties and is protective in animal models of sepsis. The dual functional properties of APC are particularly relevant to severe meningococcemia, where acquired PC deficiency is accompanied by multiorgan failure and purpura fulminans. The authors conducted an open-label prospective study assessing the efficacy of PC replacement therapy in patients with severe meningococcal septicemia, purpura fulminans, and multiorgan failure. The morbidity and mortality were compared with predicted morbidity using the Glasgow Meningococcal Septicemia Prognostic Score. Thirty-six patients with a mean age of 12 years (range 3 months to 72 years) were enrolled in the study. The mean +/- SD for plasma PC was 18 +/- 7 IU/mL. PC was significantly lower than antithrombin or protein S and was also significantly lower than PC levels in a cohort of patients who developed meningococcemia without multiorgan failure and purpura fulminans. A total of 3 of 36 (8%) patients died, which compares favorably with predicted mortality of 18 of 36 (50%). Amputations were required in 4 of 33 (12%) survivors and in 2 of 31 (6.5%) patients who received PC within 24 hours of admission into the hospital, in comparison with the predicted amputation rate of 11 of 33 (30%). In conclusion, PC replacement therapy in severe meningococcal septicemia was associated with a reduction in predicted morbidity and mortality. The beneficial effect of PC replacement may reflect both the anticoagulant and anti-inflammatory properties of the PC pathway. (Blood. 2000;96:3719-3724)

The effect of ventilation tubes on stresses and vibration motion in the tympanic membrane: a finite element analysis

Finite element analysis is used to determine the mechanical behaviour of structures. The deformation of a structure caused by a force can be calculated, and the stresses and strains within the component can be found. In brief, a geometric representation-a 'drawing'-of the structure is loaded into a computer, and a component is divided into 'elements' which usually have the shape of 'bricks'. A common analogy is a 'lego' brick assembly. The deformation of an element can be determined using engineering formulae, and the deformation of the whole structure can be determined when the elements are re-asssembled. There have been very few analyses of the biomechanical behaviour of ventilation tubes, or grommets, even though clinical studies have indicated that tube design and material determines extrusion rates and may influence tympanosclerosis. This paper reports a comprehensive biomechanical analysis of the effect of a grommet on the tympanic membrane. Analytical and computer simulation techniques (finite element analysis) are used to determine the changes in the vibratory motion and stresses in the membrane when a Reuter-Bobbin ventilation tube is inserted. It is found that the presence of a ventilation tube significantly affects the motion of the membrane in the neighbourhood of the implant. When the effect of implant material is investigated, it is found that the amplitude of motion of a heavier metal implant is less than a lighter polymeric implant. If it is true that higher motion predisposes towards early extrusion, then the lighter implant (polyethylene) is predicted to have a higher extrusion rate. Regarding the maximum stresses in the tympanic membrane, they form a crescent-shaped region in the anterior and posterior quadrants in the regions where tympoansclerosis is observed. The magnitude and pattern of the stress is predicted not to depend significantly on the presence of the tube. This suggests that tympanosclerosis is not determined by the implant per se and therefore that no tube design feature can be expected to prevent it.

Nerve monitoring in thyroid surgery: is it worthwhile?

This study analysed the use of the commercially available Neurosign 100(R) Nerve Monitor during thyroidectomy. Consecutive patients undergoing thyroidectomy were monitored. The nerve response prior to and after thyroidectomy were compared as were the relative benefits of mono and bipolar electrodes. Twenty-one consecutive patients over 9 months were assessed. The threshold for stimulation of the recurrent laryngeal nerve was never more than 0.5 mA (range 0.2-0.5 mA) for the bipolar and 1.5 mA (range 0.2-1.5 mA) for the unipolar electrode. The threshold for the superior laryngeal nerve was 1 mA and 1.5 mA, respectively. Following resection, stimulation levels of the laryngeal nerves were unchanged. Use of the Neurosign 100 Nerve Monitor is helpful in laryngeal nerve localization and confirmation. The bipolar electrode set at 30 Hz. and 0.5 mA for the recurrent laryngeal nerve and 1.0 mA for the superior laryngeal nerve is recommended. Threshold comparison before and after resection would appear to have a prognostic value.

Prevention services in primary care: taking time, setting priorities

Preventive services are delivered at rates far below recommended levels. Although lack of time has frequently been cited as an important factor, little is known about how much time primary care clinicians devote to prevention and how they prioritize that time. Work sampling was used to estimate the proportion of time spent on prevention during routine care of patients by primary care clinicians in two hospital-based clinics serving indigent patients. Clinicians were prompted by computer at random intervals to describe their current activity and, if the activity was prevention-related, to choose the specific activity from a list modified from the U.S. Preventive Services Task Force (USPSTF) recommendations. Proportions of time spent on prevention overall and by specific prevention activity were calculated, and the association between USPSTF ratings of specific prevention activities and proportion of time spent on those activities was examined using Kendall's Tau. Clinicians in these clinics spent just 11% of their time on prevention, or about 7 minutes per patient per year. Screening for just two diseases, breast cancer and cervical cancer, accounted for half of all prevention-related activity. There was no overall relation found between proportion of time by specific prevention activity and USPSTF ratings. Thus, the primary care clinicians spent little time on prevention and did not apportion that time according to USPSTF recommendations. If these results are representative, time constraints in actual practice may be too severe to deliver the full range of preventive services suggested by USPSTF.

Nucleolin promotes homologous DNA pairing in vitro

We purified to near homogeneity a previously identified 100 kDa mammalian homologous DNA pairing protein. The purified 100 kDa protein also catalyzed high levels of cell-free homologous DNA recombination activity. This ATP-dependent activity was capable of forming conservative recombinant products between two circular, double-stranded DNA molecules. We were unable to detect any DNA polymerase, DNA ligase, or 5' or 3' exonuclease activity associated with this purified material. The purified 100 kDa protein bound silver nitrate as well as a monoclonal antibody specific for nucleolin. A recombinant protein comprised of the Escherichia coli maltos-ebinding protein fused to the carboxyl-terminal two-thirds of human nucleolin possessed homologous DNA pairing activity. These data indicate that the 100 kDa homologous DNA pairing protein is nucleolin. The observation that nucleolin can carry out homologous DNA strand pairing in vitro raises the prospect that it may function similarly in vivo.

Use of protein-C concentrate, heparin, and haemodiafiltration in meningococcus-induced purpura fulminans

BACKGROUND

Inflammatory and coagulation processes are both affected in meningococcaemia. Severe acquired protein-C deficiency in meningococcaemia is usually associated with substantial mortality: in survivors, skin grafts, amputation, and end-organ failure are not uncommon. Protein C is a natural anticoagulant and also has important anti-inflammatory activity. We assessed the effects of early replacement therapy with protein-C concentrate together with continuous veno-venous haemodiafiltration and conventional treatment in meningococcaemia.

METHODS

12 patients aged between 3 months and 27 years with meningococcaemia and severe acquired protein-C deficiency (mean 0.20 IU/mL) were studied. All patients had septic shock, widespread purpura, skin necrosis, and disseminated intravascular coagulopathy. After a test dose of protein-C concentrate, patients received a continuous infusion with the dose adjusted daily to keep the plasma concentration between 0.8 and 1.2 IU/mL. 11 patients were given unfractionated intravenous heparin (10-15 IU kg-1 h-1). Nine patients had haemodiafiltration and one had peritoneal dialysis. The Glasgow meningococcal septicaemia prognostic score and the paediatric risk of mortality score predicted a minimum mortality of 80% and 57%, respectively.

FINDINGS

No patient died. No adverse reactions to the treatment were seen. Two patients had lower-limb amputations, one of whom had a thrombotic cerebrovascular accident; both patients had received the protein-C concentrate and heparin later than the rest of the group (60 h [16.97] vs 12 h [3.13]). One patient developed chronic renal failure despite receiving protein-C infusion 15 h after admission.

INTERPRETATION

The acquired severe deficiency of protein C in meningococcaemia contributes to the pathogenesis of the thrombotic necrotic lesions in the skin and other organs and probably has an important role in the inflammatory response. Protein-C therapy is merely one approach to improve the host response in this syndrome. We suggest that a double-blind, randomised, controlled multicentre trial is needed to confirm our results.

Educating nurses to undertake clinical supervision in practice

Alongside interest in the process of clinical supervision, there is a growing recognition of the need for education for practitioners undertaking the role of supervisor. This article describes a module accredited by the Welsh National Board and the University of Wales, Swansea, which was designed to achieve this aim and help practitioners design structures for supervision applicable to their practice settings. The structure and content of the module are described, as well as an evaluation of the first intake.

Using workshops to implement supervision

Clinical supervision is both topical and novel among many practice disciplines so it is important to consider how to take such an important initiative forward. This article describes a series of workshops designed to achieve this aim. The article focuses on the participants' perceptions of clinical supervision and its relevance to their practice environment. The authors also suggest ways to assist clinical staff further in this area.