Interviews with policymakers in Australian health policy: Understanding the process of policy development

OBJECTIVE

To determine the barriers and enablers oral health and chronic disease policymakers identify during policy development.

METHODS

Semi-structured interview questions were developed utilizing an interview guide and applying a knowledge mobilization framework. Reflective thematic analysis of the data was completed based on the research of Braun and Clarke encompassing a critical realist approach.

RESULTS

Twelve policymakers were interviewed. Policymakers reported barriers to accessing evidence including the sheer volume of information and a lack of: research summaries, comprehensive oral health data sets, open access articles, consistency of reporting, and time. They did find relationships with experts and intermediaries crucial at times to policy development. Co-creation of research was also a key enabler for policymakers.

CONCLUSIONS

This study highlights that policymakers find evidence crucial during the development of policy and often use it to advocate for policies. However, the links between poor oral health; and cardiovascular disease, diabetes, and cognitive impairment are not well recognized among chronic disease policymakers. It is important that oral health researchers and policymakers work to close this gap. The treatment of poor oral health is a global population health issue. It is imperative that evidence of these links is implemented into health policy for the treatment and prevention of chronic diseases and improved quality of life for individuals living with chronic diseases.

Intraprofessional learning: Dentistry and oral health students' readiness and experience

INTRODUCTION

Intraprofessional learning is a promising approach to enhance teamwork and patient care. This mixed-method study aimed to assess the readiness and experience of dental and oral health students toward intraprofessional learning.

METHODS

Dental and oral health students were paired alternatively in a clinician and assistant role in a pediatric clinical setting. The Readiness for Interprofessional Learning Scale was adapted for a pre- and post-survey. Focus groups were conducted to elicit the students' shared learning experience.

RESULTS

Approximately 50% of dental and oral health students participated in the pre- and post-survey. Pre-test findings revealed similar attitudes toward intraprofessional practice for both groups. However, a statistically significant lower score (p < 0.022) for the oral health students in the post-test suggested a less positive attitude toward their experience. Qualitative results indicated that dental students acquired a better understanding of the clinical scope of oral health students, and they learned clinical skills and behavior management from their counterparts. Conversely, oral health students experienced a hierarchical lack of collegiality and reciprocity from dental students, which may have contributed to their lower post-test score. Despite this, some oral health students gained more confidence in their roles and abilities within the intraprofessional team. Overall, dental students valued this learning experience more and desired more intraprofessional opportunities.

CONCLUSION

Both groups of dental and oral health students had similar readiness levels to enter intraprofessional practice, appreciated the intraprofessional experience, and gained an increased appreciation for the collaborative approach to patient care. Intraprofessional learning during training may assist with developing collegiality across the dental professions in practice.

Building capacity for citizen science in health promotion: a collaborative knowledge mobilisation approach

Policymakers and practitioners in health promotion (e.g. those working for local, state or federal government organisations or community and non-government organisations with a focus on health and wellbeing) are increasingly interested in citizen science as a means of involving the public in research and decision making. The potential benefits of citizen science approaches in health promotion include increased research capacity, incorporation of community perspectives on problems and solutions, and improved public awareness and acceptance of actions to improve health. However, health promotion practitioners and policymakers report having limited familiarity and experience with citizen science and a desire to build their capacity in these approaches. The Citizen Science in Prevention (CSP) project aims to build capacity for citizen science in health promotion by: 1) supporting the development and implementation of citizen science projects by policymakers and practitioners, 2) establishing a network of health promotion stakeholders with familiarity and interest in citizen science approaches, and 3) co-designing resources to support the use of citizen science in policy and practice contexts. A comprehensive mixed methods evaluation will establish the reach, satisfaction, and impacts that can be attributed to the capacity building intervention. This paper describes the first known initiative to build capacity in the application of citizen science approaches in health promotion and we hope that this work will assist others in the development and implementation of capacity building activities for citizen science in health promotion and beyond.

Early childhood caries sequelae and relapse rates in an Australian public dental hospital

BACKGROUND

Early childhood caries (ECC) remains one of the most prevalent childhood diseases in Australia, disproportionately affecting disadvantaged populations.

AIM

To investigate the ECC experience including risk factors, incidence of caries, pain and infection as well as relapse rates of caries and secondary dental general anaesthesia (GA).

DESIGN

A retrospective cohort study included dental records of children with ECC, aged <72 months at an Australian public dental hospital paediatric dentistry department from 2013 to 2015 (n = 102). Dental caries, pain, infection, referral patterns, demographic and caries risk factor data were recorded for 24 months. Descriptive statistics were used for patient characteristics and clinical data, and Kaplan-Meier curves and parametric exponential survival models for time-to-event series.

RESULTS

The study population demonstrated higher-than-national average dmft and disease progression at baseline. Major risk factors for the development of caries, pain and infection were daily consumption of sweetened beverages, poor oral hygiene, residing in lower socio-economic areas, older age and being male. Rates of caries relapse and new referral for secondary treatment under general anaesthesia were relatively high.

CONCLUSION

A high degree of ECC progression and recurrence in this population indicates a need for a more comprehensive approach to ECC addressing multilevel root causes and systemic risk factors.

Baseline characteristics of participants in the NAVKIDS2 trial: a patient navigator program in children with chronic kidney disease

BACKGROUND

Children with chronic kidney disease (CKD) require multidisciplinary care to meet their complex healthcare needs. Patient navigators are trained non-medical personnel who assist patients and caregivers to overcome barriers to accessing health services through care coordination. This trial aims to determine the effectiveness of a patient navigator program in children with CKD.

METHODS

The NAVKIDS² trial is a multi-center, waitlisted, randomized controlled trial of patient navigators in children with CKD conducted at five sites across Australia. Children (0-16 years) with CKD from low socioeconomic status rural or remote areas were randomized to an intervention group or a waitlisted control group (to receive intervention after 6 months). The study primary and secondary endpoints include the self-rated health (SRH) (primary), and utility-based quality of life, progression of kidney dysfunction of the child, SRH, and satisfaction with healthcare of the caregiver at 6 months post-randomization.

RESULTS

The trial completed recruitment in October 2021 with expected completion of follow-up by October 2022. There were 162 patients enrolled with 80 and 82 patients randomized to the immediate intervention and waitlisted groups, respectively. Fifty-eight (36%) participants were from regional/remote areas, with a median (IQR) age of 9.5 (5.0, 13.0) years, 46% were of European Australian ethnicity, and 65% were male. A total of 109 children (67%) had CKD stages 1-5, 42 (26%) were transplant recipients, and 11 (7%) were receiving dialysis.

CONCLUSION

The NAVKIDS² trial is designed to evaluate the effectiveness of patient navigation in children with CKD from families experiencing socioeconomic disadvantage. A higher resolution version of the Graphical abstract is available as Supplementary information.

NAVKIDS2 trial: a multi-centre, waitlisted randomised controlled trial of a patient navigator intervention in children with chronic kidney disease - statistical analysis plan and update to the protocol

Background

This update summarises key changes made to the protocol since the publication of the original protocol for the NAVKIDS² trial of patient navigators for children with chronic kidney disease (CKD) experiencing social disadvantage and provides the statistical analysis plan (SAP) which has not previously been published.

Methods/design

The original protocol was published in BMC Nephrology (10.1186/s12882-019-1325-y) prior to the commencement of trial recruitment. During the course of the trial, some key methodological changes needed to be made including changes to eligibility criteria (addition of patients with CKD stages 1–2, broadening of financial status eligibility criterion, addition of patients living in rural/remote areas, modification of age eligibility to 0–16 years, addition of limits related to the language spoken by family, guidance regarding families with multiple eligible children), changes to sites, reduction of sample size, addition of virtual options for consent and study procedures in response to the COVID-19 pandemic, removal of staggered recruitment across sites, addition of outcomes, and changes to the timing and number of assessments. This update summarises the changes made and their rationale and provides the detailed plan for statistical analysis of the trial. These changes have been finalised prior to the completion of study follow-up and the commencement of data analysis.

Trial registration

Australian New Zealand Clinical Trials Registry (ANZCTR) ACTRN12618001152213. Prospectively registered on 12 July 2018

Supplementary Information

The online version contains supplementary material available at 10.1186/s13063-022-06783-y.

A scoping review of oral health outcomes for people with cerebral palsy

INTRODUCTION

Good oral health is important for good overall health. Studies have reported poorer oral health outcomes for people with cerebral palsy, but there has been no synthesis of the evidence surrounding this and, there are no clear oral health recommendations for people with cerebral palsy globally. This review synthesizes the existing knowledge base on oral health in people with cerebral palsy and provides recommendations for future research.

METHODS

A scoping review was conducted to assess the current literature. Databases were searched using relevant search terms. Study outcomes were synthesized according to their reported outcomes.

RESULTS

One hundred seventy three studies were included in this review. Children with cerebral palsy have an increased risk for dental caries and untreated caries. Higher saliva osmolality is a major contributor to increased dental caries. People with cerebral palsy are more likely to experience tooth wear and bruxism. Children and their care-givers have poor oral health related quality of life. There is a large unmet need for oral healthcare in this group. There is no suggested plan for the prevention of poor oral health for this group. A high number of studies included related to research is conducted in low- and middle-income countries, care should be taken in applying results outside this context. There is a lack of research conducted in people with cerebral palsy, 18 years and over.

CONCLUSION

There is a higher risk for poor oral health in people with cerebral palsy and there is a large unmet need to dental care in this group. This study highlights the need for further research to focus on adults with cerebral palsy and an of understanding the oral health care outcomes in the context of settings. The authors recommend the inclusion of classification systems and the integration of disability inclusive language in future studies.

A study to evaluate the introduction of the Newborn Infant Physical Examination knowledge and skills into an undergraduate pre-registration midwifery education programme

Newborn Infant Physical Examination is recommended between six to 72 h from birth and the midwife is ideally placed to undertake this screening examination. In the United Kingdom only a small percentage of midwives are competent to undertake this screening, and is usually taught once qualified. The aim of this qualitative study was to explore the experiences of student midwives in relation to the impact and effectiveness of introducing the theory of Newborn Infant Physical Examination into an undergraduate midwifery curriculum and the opportunity to apply the skills in practice. Two focus groups with final year student midwives (n = 11) were undertaken. The transcribed interviews were reviewed by the researchers and thematically analysed. Three themes emerged: i) timing of the theoretical content, ii) applying theory to practice iii) holistic care. Recommendations include the importance of incorporating the theoretical elements into the programme even if students do not have the opportunity to become competent in the required skills. Most students favoured the theory elements to be threaded throughout the three year programme rather than having a single dedicated module. Students identified that when midwives completed the newborn examination, holistic care was improved.

Mobile photographic screening for dental caries in children: Diagnostic performance compared to unaided visual dental examination

OBJECTIVES

This study was conducted to compare the use of intraoral photographs with the unaided visual dental examination as a means of dental caries detection in children.

METHODS

Children aged 4- to 14-year-olds were visually examined at their schools. Following dental examinations, children had five photographs of their teeth taken using a smartphone camera. Four dental reviewers, who are different from those who visually examined the children, assessed intraoral photographs for dental caries. Sensitivity, specificity, and inter-rater reliability agreement were estimated to assess the diagnostic performance of the photographic method relative to the benchmark visual dental assessments. Caries prevalence was measured using dft/DFT (decayed and filled teeth) index.

RESULTS

One hundred thirty-eight children (67 male and 71 female) were enrolled and had a mean age of 7.8 ± 2.1 years. The caries prevalence (dft/DFT > 0) using photographic dental assessments ranged from 30 percent to 39 percent but was not significantly different from the prevalence (42 percent) estimated with the visual dental examination (P ≥ 0.07). The sensitivity and specificity of the photographic method for detection of dental caries compared to visual dental assessments were 58-80 percent and 99.7-99.9 percent, respectively. The sensitivity for the photographic assessments was high in the primary dentition (63-82 percent) and children ≤7-year-olds (67-78 percent). The inter-rater reliability for the photographic assessment versus the benchmark ranged from substantial to almost perfect agreement (Kappa = 0.72-0.87).

CONCLUSIONS

The photographic approach to dental screening, used within the framework of its limitations, yielded an acceptable diagnostic level of caries detection, particularly in younger children with primary dentition.

Mobile Apps for Dental Caries Prevention: Systematic Search and Quality Evaluation

Background

Dental caries is the most common multifactorial oral disease; it affects 60% to 90% of the global population. Dental caries is highly preventable through prevention behaviors aimed at improving oral hygiene, adequate fluoride usage, and dietary intake. Mobile apps have the potential to support patients with dental caries; however, little is known about the availability, target audience, quality, and features of these apps.

Objective

This review aims to systematically examine dental caries prevention apps; to describe their content, availability, target audience, and features; and to assess their quality.

Methods

We systematically identified and evaluated apps in a process paralleling a systematic review. This included a search strategy using search terms; an eligibility assessment using inclusion and exclusion criteria focused on accessibility and dental caries self-management behaviors, including oral hygiene, dietary intake, and fluoride usage; data extraction on app characteristics, including app store metrics; prevention behavior categorization; feature identification and description; a quality appraisal of all apps using the validated Mobile App Rating Scale (MARS) assessment tool; and data comparison and analysis.

Results

Using our search strategy, we retrieved 562 apps from the Google Play Store and iTunes available in Australia. Of these, 7.1% (40/562) of the apps fit our eligibility criteria, of which 55% (22/40) targeted adults, 93% (37/40) were free to download, and 65% (26/40) were recently updated. Oral hygiene was the most common dental caries prevention behavior domain, addressed in 93% (37/40) of the apps, while dietary intake was addressed in 45% (18/40) of the apps and fluoride usage was addressed in 42% (17/40) of the apps. Overall, 50% (20/40) of the apps addressed only 1 behavior, and 38% (15/40) of the apps addressed all 3 behaviors. The mean MARS score was 2.9 (SD 0.7; range 1.8-4.4), with 45% (18/40) of the apps categorized as high quality, with a rating above 3.0 out of 5.0. We identified 21 distinctive features across all dental caries prevention behaviors; however, the top 5 most common features focused on oral hygiene. The highest-ranking app was the Brush DJ app, with an overall MARS score of 4.4 and with the highest number of features (n=13). We did not find any apps that adequately addressed dental caries prevention behaviors in very young children.

Conclusions

Apps addressing dental caries prevention commonly focus on oral hygiene and target young adults; however, many are not of high quality. These apps use a range of features to support consumer engagement, and some of these features may be helpful for specific patient populations. However, it remains unclear how effective these apps are in improving dental caries outcomes, and further evaluation is required before they are widely recommended.

Customised approaches to vocational education can dramatically improve completion rates of Australian Aboriginal students

Objective Completion rates in vocational education are typically poor for Aboriginal students (<30%). A scholarship program was designed for Australian Aboriginal students using five enablers of success previously identified for Aboriginal preregistration tertiary nursing students. The purpose of this study was to evaluate whether the five enablers contributed to the success of Aboriginal students in vocational education and whether there were any other enablers. Methods Semistructured interviews were conducted with two groups of Aboriginal students in Certificate III and IV Dental Assisting and Certificate IV in Allied Health Assistance, and their teaching and support staff. The data were initially coded inductively. Initial codes were then categorised according to the five enablers identified to contribute to the success of Bachelor of Nursing students. New categories were created for data not assigned to the enablers. Results Twenty students (64.5% of the cohort) and six staff (75%) consented to participate. The five enablers were perceived to have contributed to the success of the scholarship recipients and two additional enablers were identified. A completion rate of 96.8% was achieved by the scholarship recipients (30 completions of 31 enrolments). Conclusions In contrast with the state average, a completion rate of 96.8% was achieved using seven enablers in this study. To improve completion rates for Aboriginal students, vocational education programs need to be customised to cultural, family and community context. The seven enablers in this study should be subject to a larger study to inform policy, funding, design and delivery of vocational training for Aboriginal students. What is known about the topic? It is well established in the literature that Aboriginal students have poorer educational outcomes than other students. What does this paper add? This paper validates five previously identified enablers to improve outcomes for Aboriginal students and an additional two for vocational education. These enablers may also be applicable to other types of education. What are the implications for practitioners? Practitioners can use the enablers in this study to design and implement vocational education programs and improve educational outcomes for Aboriginal students.

An Indigenous cultural competence model for dentistry education

Reorientation of education for health professionals is necessary to support future health workforce in meeting population needs. Dental graduates must be competent to effectively communicate with patients, their families and other health professionals involved in their care, regardless of social or cultural background. Indigenous people in Australia experience significant oral health disparities compared to non-Indigenous Australians. Cultural competence has evolved as the leading model to equip future clinicians to deliver culturally safe care. A case study conducted at the University of Sydney School of Dentistry examined the integration of Indigenous cultural competence into dental curricula using four data sources: a systematic review identifying intervention strategies to improve cultural competence; an online survey to provide a baseline analysis of Indigenous curricula practices; and two in-depth interview studies with academics and students to determine barriers and enablers to increasing Indigenous cultural competence among dental students. As a result, an Indigenous cultural model was developed for dentistry education, recognising three major constituents being critical to achieving cultural competence among dental students. Indigenous cultural competence in dentistry education requires stringent governance, adequate faculty resources and effective educational strategies, in order to increase students' knowledge, understanding and skills to achieve a minimum cultural competence standard upon graduation.

Applying systems thinking to knowledge mobilisation in public health

CONTEXT

Knowledge mobilisation (KM) is a vital strategy in efforts to improve public health policy and practice. Linear models describing knowledge transfer and translation have moved towards multi-directional and complexity-attuned approaches where knowledge is produced and becomes meaningful through social processes. There are calls for systems approaches to KM but little guidance on how this can be operationalised. This paper describes the contribution that systems thinking can make to KM and provides guidance about how to put it into action.

METHODS

We apply a model of systems thinking (which focuses on leveraging change in complex systems) to eight KM practices empirically identified by others. We describe how these models interact and draw out some key learnings for applying systems thinking practically to KM in public health policy and practice. Examples of empirical studies, tools and targeted strategies are provided.

FINDINGS

Systems thinking can enhance and fundamentally transform KM. It upholds a pluralistic view of knowledge as informed by multiple parts of the system and reconstituted through use. Mobilisation is conceived as a situated, non-prescriptive and potentially destabilising practice, no longer conceptualised as a discrete piece of work within wider efforts to strengthen public health but as integral to and in continual dialogue with those efforts. A systems approach to KM relies on contextual understanding, collaborative practices, addressing power imbalances and adaptive learning that responds to changing interactions between mobilisation activities and context.

CONCLUSION

Systems thinking offers valuable perspectives, tools and strategies to better understand complex problems in their settings and for strengthening KM practice. We make four suggestions for further developing empirical evidence and debate about how systems thinking can enhance our capacity to mobilise knowledge for solving complex problems - (1) be specific about what is meant by 'systems thinking', (2) describe counterfactual KM scenarios so the added value of systems thinking is clearer, (3) widen conceptualisations of impact when evaluating KM, and (4) use methods that can track how and where knowledge is mobilised in complex systems.

Health promotion interventions to improve oral health of adolescents: A systematic review and meta-analysis

OBJECTIVES

To evaluate the effectiveness of health promotion interventions on oral health knowledge, behaviour and status of healthy adolescents.

METHODS

This review included randomized controlled trials (RCTs) of oral health promotion interventions targeting adolescents. Primary clinical outcomes (gingival health, plaque scores, caries) and secondary proxy outcomes were evaluated. Meta-analysis of primary outcomes was conducted where possible, with subgroup analysis based on intervention (comprehensive health promotion and education-only).

RESULTS

Thirty-seven eligible publications reporting on 28 unique RCTs of oral health promotion interventions were included. Quality appraisal of studies ranged from 48% to 96%. Interventions reported ranged from single-session interventions to community-wide programmes, including clinical preventive procedures and take-home products. Half used a health behaviour change theory to inform their intervention. The meta-analysis pooling of results favoured the intervention over control for all clinical outcomes, except DMFS in the education-only subgroup. Stronger intervention effects were seen in the comprehensive intervention subgroup than the education-only subgroup for DMFS (P = .02). This effect was slight, but not as clear in all other clinical categories. The majority of studies reported improvements in oral health knowledge, attitudes and behaviours. More positive outcomes were found with longer programmes, especially for dental caries outcomes.

CONCLUSIONS

Oral health promotion programmes targeting adolescents have the ability to improve clinical oral health outcomes in the short and long term. Programmes should use more behavioural theory-based interactive and strategic methods, including self-awareness and the use of the wider community and peers for oral health promotion activities over a longer intervention duration.

An evaluation of health workforce models addressing oral health in residential aged care facilities: A systematic review of the literature

BACKGROUND

In Australia and globally, there is an increasing problem of unmet oral health needs of older people above 65 residing in aged care facilities. Various workforce models have been trialled to implement oral health care programmes in aged care facilities, but the evidence behind these programmes and their underlying workforce models is not known.

OBJECTIVE

To systematically review the literature on the effectiveness, and economic feasibility of the current workforce models addressing oral care in aged care facilities.

METHODS

CINAHL, Cochrane CENTRAL, MEDLINE, EMBASE, EMB Reviews, NHS Economic Evaluation Database and grey literature were searched. Studies were included if they described an oral health workforce model with a clinical intervention and defined oral health outcome measures. Analysis was conducted using the NHMRC guidelines for scientific and economic evaluations.

RESULTS

Twenty-eight studies were included. Four distinct workforce models of care were identified. 60% of the studies demonstrated short-term effectiveness in clinical measures. Workforce models were similar in their effectiveness, with varying levels of quality within each model. Although three studies considered individual components of economic feasibility, only one provided a comprehensive economic analysis of both the costs and health outcomes.

CONCLUSIONS IMPLICATIONS OF FINDINGS

All workforce models of care had some positive impact on oral health for residents of aged care. Oral health should be included as a health focus in age care facilities. Future studies should include longer-term health outcomes with rigorous economic analysis to ensure sustainably delivered workforce models of care for oral health management within aged care.

Oral health outcomes for people with cerebral palsy: a scoping review protocol

OBJECTIVE

This review aims to systematically map the literature reporting on oral health outcomes experienced by people with cerebral palsy.

INTRODUCTION

At present, there are no documented systematic reviews reporting on oral health outcomes for people of all ages with cerebral palsy. Subsequently, there are no clear guidelines, frameworks or detailed oral health recommendations for people with cerebral palsy. Considering the importance of oral health on general well-being and quality of life, it is important that it is not overlooked when focusing on patient-centered care for people with cerebral palsy.

INCLUSION CRITERIA

Studies that focus on oral health, including dental diagnosis, trauma and/or treatment, facial pain, saliva, and sleep apnea, and/or make statements regarding oral health pertaining to cerebral palsy will be considered for inclusion inthis scoping review.

METHODS

This review will be conducted in accordance with the guidelines outlined by JBI methodology for scoping reviews and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Extension for Scoping Reviews (PRISMA-ScR). Articles published in any language will be considered for inclusion, with no restriction on publication date. The search databases will include the Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science, Scopus, Embase and Dentistry and Oral Science. A search of gray literature will also be conducted. Extracted data relevant to the scoping review will be performed by two reviewers.

Strengthening Indigenous cultural competence in dentistry and oral health education: Academic perspectives

INTRODUCTION

Indigenous Australians continue to experience significant oral health disparities, despite numerous closing-the-gap initiatives. Higher education institutions and accrediting bodies recognise the need to incorporate Indigenous culture more widely into dentistry curricula to address these inequalities. This study aimed to define and explore current Indigenous cultural competence curricula, identify enablers and barriers for integration of Indigenous cultural competence curricula and ascertain innovative strategies to aid students in becoming culturally competent upon graduation, from academics' perspectives.

METHODS

Academics from the Doctor of Dental Medicine (DMD) and Bachelor of Oral Health (BOH) programmes at the University of Sydney, School of Dentistry participated in semi-structured interviews to define and explore current and future curricula practices to enable students to become competent in Indigenous culture. Thematic analysis was conducted to synthesise academics' responses.

RESULTS

Thirteen School of Dentistry academics participated in interviews. Following analysis of the data, six key themes emerged: Theme One: Transfer of Indigenous cultural knowledge, Theme Two: Barriers to developing Indigenous cultural curriculum. Theme Three: Importance of cultural immersion, Theme Four: Resources required for Indigenous cultural education, Theme Five: Proposed Indigenous cultural content, Theme Six: Strategies to incorporate Indigenous culture into curricula.

CONCLUSION

Improving Indigenous cultural competence amongst dentistry academics and students requires an educational and philosophical shift, incorporating the social determinants of health whilst maintaining the strengths of the biomedical foundations of dental care. It requires the inclusion of an informed history of Indigenous Australians, immersion within Indigenous communities and reflection upon these experiences, to facilitate culturally appropriate ways to improve the provision of dentistry and oral health for Indigenous peoples.

Enabling Aboriginal dental assistants to apply fluoride varnish for school children in communities with a high Aboriginal population in New South Wales, Australia: a study protocol for a feasibility study

Background

Australian Aboriginal children experience high levels of dental caries (tooth decay) and are less likely to access preventive dental health services. High-strength fluoride varnish has been shown to reduce the incidence of dental caries and is commonly used in community-based preventive dental health service programs. In New South Wales, Australia, the application of fluoride varnish is restricted to dental and medical professionals. This is problematic in communities with a high Aboriginal population and limited access to oral health services, contributing to the increased risk of developing dental caries in Aboriginal children. Dental assistants are essential members of the oral health team; however, they do not have a defined scope of practice in Australia. Other countries have created formal scopes of practice for dental assistants to include the application of fluoride varnish. This protocol presents a pathway for qualified Aboriginal dental assistants to undertake additional training to legally apply fluoride varnish in New South Wales. The primary objective of this study will be to evaluate the feasibility and acceptability of utilising Aboriginal dental assistants to apply fluoride varnish to Aboriginal children in a school setting at regular 3-month intervals.

Methods

Six schools across New South Wales (NSW) that enrol at least 12% Aboriginal children will be invited to participate in the 12-month study. Aboriginal children aged 5–12 years enrolled in these schools will be enrolled in the study. Six Aboriginal dental assistants will undertake training to apply fluoride varnish. Fluoride varnish (Duraphat) will be applied at 3-month intervals by the dental assistants to the teeth using a small brush. An evaluation will be undertaken to determine the feasibility and cost-effectiveness of this innovative approach. This study protocol has been approved by the NSW Aboriginal Health and Medical Research Council and the NSW State Education Research Application Process.

Discussion

A qualified Aboriginal dental assistant workforce in NSW (or Australia) legally approved to apply fluoride varnish may increase the sustainability and scalability of fluoride varnish programs and improve the oral health of Aboriginal children in Australia.

Trial registration

ISRCTN26746753.

Electronic supplementary material

The online version of this article (10.1186/s40814-019-0399-4) contains supplementary material, which is available to authorized users.

An assessment of strategies to control dental caries in Aboriginal children living in rural and remote communities in New South Wales, Australia

BACKGROUND

A community-led oral health service for Aboriginal people in Central Northern NSW identified the need for oral health promotion, as well as dental treatment; in three remote communities with limited access to dental services. A three-stage plan based on the Precede-Proceed model was used to develop a school-based preventive oral health program. The program will be piloted in three schools over 12 months aimed at improving the oral health of local Aboriginal children.

METHODS

The proposed program includes four components: daily in-school toothbrushing; distribution of free fluoride toothpaste and toothbrushes; in-school and community dental health education and the installation of refrigerated and chilled water fountains to supply a school water bottle program. Primary school children will be issued toothbrushing kits to be kept at school to facilitate daily brushing using a fluoride toothpaste under the supervision of trained teachers and/or Oral Health Aides. School children, parents and guardians will be issued free fluoride toothpaste and toothbrushes for home use at three-monthly intervals. Four dental health education sessions will be delivered to children at each school and parents/guardians at local community health centres over the 12 month pilot. Dental education will be delivered by an Oral Health Therapist and local Aboriginal Dental Assistant. The program will also facilitate the installation of refrigerated and filtered water fountain to ensure cold and filtered water is available at schools. A structured school water bottle program will encourage the consumption of water. A process evaluation will be undertaken to assess the efficiency, feasibility and effectiveness of the pilot program.

DISCUSSION

The proposed program includes four core evidence-based components which can be implemented in rural and remote schools with a high Aboriginal population. Based on the Precede-Proceed model, this program seeks to empower the local Aboriginal community to achieve improved oral health outcomes.

TRIAL REGISTRATION

TRN: ISRCTN16110292 Date of Registration: 20 June 2018.

Indigenous cultural competence: A dental faculty curriculum review

BACKGROUND

Indigenous Australians have more than double the rate of poor oral health than their non-Indigenous counterparts. Cultural competence of dental and oral health practitioners is fundamental to health care and quality of life in addressing health disparities in minority cultural groups in Australia. Higher education curricula reviews have identified the need for institutions to incorporate Indigenous culture and knowledge more widely into the curricula to improve educational outcomes for Indigenous Australians and to increase cultural competence for all students.

AIM

The aim of this research was to provide a baseline analysis of Indigenous cultural competence curricula practices to ascertain changes required within Faculty of Dentistry programmes at the University of Sydney to enable students to become more culturally competent upon graduation.

METHODS

Staff and students of the Doctor of Dental Medicine and Bachelor of Oral Health programmes at the Faculty of Dentistry, University of Sydney participated in an online survey. Quantitative analysis of the survey data was conducted using integrated research electronic data capture survey tools, with open-ended questions being coded to common responses for those questions.

RESULTS

A total of 69 staff (71%) and 191 students (51%) participated in the online survey. The majority of participants perceived there was limited Indigenous content in the curriculum. Most participants reported that Indigenous curriculum was integrated into several units of study. The main pedagogical method for curriculum delivery was lectures, followed by case studies and group discussions.

CONCLUSION

Although some Indigenous content exists in dental faculty curriculum, in-depth investigation is required to develop a comprehensive, evidenced-based Indigenous cultural competence teaching framework, for integration into Doctor of Dental Medicine and Bachelor of Oral Health curricula.

Mechanisms regulating T-cell infiltration and activity in solid tumors

T-lymphocytes play a critical role in cancer immunity as evidenced by their presence in resected tumor samples derived from long-surviving patients, and impressive clinical responses to various immunotherapies that reinvigorate them. Indeed, tumors can upregulate a wide array of defense mechanisms, both direct and indirect, to suppress the ability of Tcells to reach the tumor bed and mount curative responses upon infiltration. In addition, patient and tumor genetics, previous antigenic experience, and the microbiome, are all important factors in shaping the T-cell repertoire and sensitivity to immunotherapy. Here, we review the mechanisms that regulate T-cell homing, infiltration, and activity within the solid tumor bed. Finally, we summarize different immunotherapies and combinatorial treatment strategies that enable the immune system to overcome barriers for enhanced tumor control and improved patient outcome.

WNT10A mutation results in severe tooth agenesis in a family of three sisters

OBJECTIVES

To identify the genetic basis of severe tooth agenesis in a family of three affected sisters.

PATIENTS AND METHODS

A family of three sisters with severe tooth agenesis was recruited for whole-exome sequencing to identify potential genetic variation responsible for this penetrant phenotype. The unaffected father was tested for specific mutations using Sanger sequencing. Gene discovery was supplemented with in situ hybridization to localize gene expression during human tooth development.

RESULTS

We report a nonsense heterozygous mutation in exon 2 of WNT10A c.321C>A[p.Cys107*] likely to be responsible for the severe tooth agenesis identified in this family through the creation of a premature stop codon, resulting in truncation of the amino acid sequence and therefore loss of protein function. In situ hybridization showed expression of WNT10A in odontogenic epithelium during the early and late stages of human primary tooth development.

CONCLUSIONS

WNT10A has previously been associated with both syndromic and non-syndromic forms of tooth agenesis, and this report further expands our knowledge of genetic variation underlying non-syndromic forms of this condition. We also demonstrate expression of WNT10A in the epithelial compartment of human tooth germs during development.

A collaboration with local Aboriginal communities in rural New South Wales, Australia to determine the oral health needs of their children and develop a community-owned oral health promotion program

INTRODUCTION

As part of an oral health service for Aboriginal people in central northern New South Wales (NSW), Australia, oral health promotion was identified as a priority by the local Aboriginal community. The objective of this study was to collaborate with local Aboriginal communities to determine (1) the oral health needs of Aboriginal children aged 5-12 years, (2) the oral health knowledge and attitudes towards oral health of parents/guardians and (3) the perceived barriers and enablers towards oral health promotion for school children by local school staff and community health workers. The results of this collaboration will inform a community-owned oral health promotion program.

METHODS

Aboriginal children aged 5-12 years enrolled in local schools received a dental screening by a single examiner. The number of decayed, missing and filled teeth of primary and permanent dentition (dmft/DMFT), plaque and gingivitis were recorded. Children completed a questionnaire assessing current oral hygiene practices, dental history and information on their diet. Parents/guardians completed a questionnaire assessing oral health knowledge and attitudes towards oral health. School staff and community health workers completed a questionnaire assessing attitudes, barriers and enablers towards implementing an oral health promotion program in schools.

RESULTS

Eighty-eight children, representing 94% of those eligible, were screened, and 78 (82%) completed a questionnaire. The mean dmft/DMFT score was 5.3. Risk factors for dental caries identified included lack of toothbrush ownership (35%), minimal fluoride toothpaste use (24%), limited daily tooth brushing (51%) and frequent consumption of sugary foods (72%) and soft drinks (64%). Questionnaires were completed by 32 parents/guardians and 39 school and community health workers. Parents/guardians had limited oral health knowledge. School and health staff were willing to support a health promotion program to improve dental health of children.

CONCLUSION

Aboriginal children living in rural and remote communities in NSW experience high rates of dental caries. Oral health promotion is urgently required to reduce the burden of dental caries and should address oral hygiene behaviours, fluoride use and access to healthy foods and drinks. Note: This article uses the term 'Aboriginal people' when referring to the first peoples of Australia. This term is inclusive of Australian Aboriginal and Torres Strait Islander people.

32 and you - genetic testing for dental disorders

Genetic testing for serious illness and disease is becoming increasingly embedded in NHS healthcare. It can confirm a clinical diagnosis or guide therapy. Genetic testing for dental developmental disorders has moved beyond the realms of rarified grant-funded research groups and is now sufficiently rapid and affordable to be offered as part of a clinical service in some dental teaching hospitals. The first presentation of some genetic diseases may be in the dental surgery, so the family dentist should hone their diagnostic skills to identify patients who would benefit from referral to a genetics service. While diagnosis may sometimes guide treatment, there are now examples where it can even lead to cure. This article aims to describe some concepts and issues that a dentist should consider when referring for testing for a genetic dental disorder, and proposes that this subject area should be expanded in the dental undergraduate and postgraduate curricula in the UK.

Tumour endothelial marker 1/endosialin-mediated targeting of human sarcoma

BACKGROUND

Tumour endothelial marker 1 (TEM1/endosialin/CD248) is a tumour-restricted cell-surface protein expressed by human sarcomas. We previously developed a high-affinity human single-chain variable fragment (scFv)-Fc fusion protein (78Fc) against TEM1 and demonstrated its specific binding to human and mouse TEM1.

PATIENT AND METHODS

Clinical sarcoma specimens were collected between 2000 and 2015 at the Hospital of the University of Pennsylvania, as approved by the institutional review board and processed by standard formalin-fixed paraffin embedded techniques. We analysed TEM1 expression in 19 human sarcoma subtypes (n = 203 specimens) and eight human sarcoma-cell lines. Near-infrared (NIR) imaging of tumour-bearing mice was used to validate 78Fc binding to TEM1⁺ sarcoma in vivo. Finally, we tested an immunotoxin conjugate of anti-TEM1 78Fc with saporin (78Fc-Sap) for its therapeutic efficacy against human sarcoma in vitro and in vivo.

RESULTS

TEM1 expression was identified by immunohistochemistry in 96% of human sarcomas, of which 81% expressed TEM1 both on tumour cells and the tumour vasculature. NIR imaging revealed specific in vivo targeting of labelled 78Fc to TEM1⁺ sarcoma xenografts. Importantly, 78Fc-Sap was effective in killing in vitro TEM1⁺ sarcoma cells and eliminated human sarcoma xenografts without apparent toxicity in vivo.

CONCLUSION

TEM1 is an important therapeutic target for human sarcoma, and the high-affinity TEM1-specific scFv fusion protein 78Fc is suitable for further clinical development for therapeutic applications in sarcoma.

Obesity and the risk of cardiovascular and all-cause mortality in chronic kidney disease: a systematic review and meta-analysis

Background

Obesity is a risk factor for cardiovascular disease and death in people without chronic kidney disease (CKD), but the effect of obesity in people with CKD is uncertain.

Methods

Medline and Embase (from inception to January 2015) were searched for cohort studies measuring obesity by body mass index (BMI), waist:hip ratio (WHR) and/or waist circumference (WC) and all-cause and cardiovascular mortality or events in patients with any stage of CKD. Data were summarized using random effects models. Meta-regression was conducted to assess sources of heterogeneity.

Results

Of 4065 potentially eligible citations, 165 studies ( n = 1 534 845 participants) were analyzed. In studies that found a nonlinear relationship, underweight people with CKD (3-5) on hemodialysis experienced an increased risk of death compared with those with normal weight. In transplant recipients, excess risk was observed at levels of morbid obesity (>35 kg/m 2 ). Of studies that found the relationship to be linear, a 1 kg/m 2 increase in BMI was associated with a 3 and 4% reduction in all-cause and cardiovascular mortality in patients on hemodialysis, respectively {adjusted hazard ratio [HR] 0.97 [95% confidence interval (CI) 0.96-0.98] and adjusted HR 0.96 (95% CI 0.92-1.00)}. In CKD Stages 3-5, for every 1 kg/m 2 increase in BMI there was a 1% reduction in all-cause mortality [HR 0.99 (95% CI 0.0.97-1.00)]. There was no apparent association between obesity and mortality in transplanted patients or those on peritoneal dialysis. Sparse data for WHR and WC did not allow further analyses.

Conclusions

Being obese may be protective for all-cause mortality in the predialysis and hemodialysis populations, while being underweight suggests increased risk, but not in transplant recipients.

Using teledentistry in clinical practice as an enabler to improve access to clinical care: A qualitative systematic review

Background Access to dental care is important for overall health, but can remain problematic for those in rural or isolated locations. It can be difficult to encourage clinicians to choose or continue a rural health career. Teledentistry is showing some promise as a strategy to support rural, isolated and new health care workers. This study aims to explore the quantitative and qualitative framework associated with teledentistry in an effort to uncover the interaction of multiple influences on its delivery and sustainability. Methods A systematic search of the literature was undertaken and studies were included if they evaluated consultative teledentistry, reports on implementation of teledentistry in practice or attitudes to teledentistry. Studies were evaluated qualitatively. Results Thirty-nine studies were included focusing on the accuracy, effectiveness or description a teledentistry project in practice. Five main themes were identified in the qualitative analysis: (1) using information and communication technology (ICT), (2) regulatory and system improvements, (3) accuracy of teledentistry, (4) effectiveness, including increasing access to clinical services, efficiencies and acceptability, and (5) building and increasing clinical capacity of the dental workforce. Conclusion Teledentistry provides a viable option for remote screening, diagnosis, consultation, treatment planning and mentoring in the field of dentistry. Rapidly developing information and communication technologies have increasingly shown improving cost effectiveness, accuracy and efficient remote assistance for clinicians. There is high acceptability for teledentistry amongst clinicians and patients alike. Remuneration of advising clinicians is critical to sustainability.

A comparison of two models of dental care for Aboriginal communities in New South Wales

BACKGROUND

Aboriginal people, and particularly those in rural areas, continue to suffer very high levels of dental disease despite significant reductions in the wider Australian population in the past 30 years. Until recently, there has been a shortage of oral health clinicians and the majority have provided care in major cities. The NSW Government funded various models of care for rural and regional areas and vulnerable population groups including Aboriginal people. This study utilizes a comparative retrospective analysis to compare two models of oral health care for Aboriginal people including those living in rural NSW to inform future policy decisions.

METHODS

Two models (Model A - Fly in Fly out and Model B - Collective impact) of public oral health care for Aboriginal patients in NSW were examined using publicly available descriptive information. Two years of funding and Dental Weighted Activity Units (DWAUs) data were analysed for the two different models and regression analysis was used to compare the trends of monthly time series of DWAUs.

CONCLUSIONS

Based on the standardized national weighted pricing for public dentistry, model B offers significantly more services for less financial resources.

Impact of interprofessional education about psychological and medical comorbidities on practitioners' knowledge and collaborative practice: mixed method evaluation of a national program

Background

Many patients with chronic physical illnesses have co-morbid psychological illnesses, which may respond to interprofessional collaborative care. Continuing education programs frequently focus on skills and knowledge relevant for individual illnesses, and unidisciplinary care. This study evaluates the impact of “Mind the Gap”, an Australian interprofessional continuing education program about management of dual illnesses, on practitioners’ knowledge, use of psychological strategies and collaborative practice.

Methods

A 6-h module addressing knowledge and skills needed for patients with physical and psychological co-morbid illnesses was delivered to 837 practitioners from mixed health professional backgrounds, through locally-facilitated workshops at 45 Australian sites. We conducted a mixed-methods evaluation, incorporating observation, surveys and network analysis using data collected, before, immediately after, and three months after training.

Results

Six hundred forty-five participants enrolled in the evaluation (58 % GPs, 17 % nurses, 15 % mental health professionals, response rate 76 %). Participants’ knowledge and confidence to manage patients with psychological and physical illnesses improved immediately. Among the subset surveyed at three months (response rate 24 %), referral networks had increased across seven disciplines, improvements in confidence and knowledge were sustained, and doctors, but no other disciplines, reported an increase in use of motivational interviewing (85.9 % to 96.8 %) and mindfulness (58.6 % to 74 %).

Conclusions

Interprofessional workshops had an immediate impact on the stated knowledge and confidence of participants to manage patients with physical and psychological comorbidities, which appears to have been sustained. For some attendees, there was a sustained improvement in the size of their referral networks and their use of some psychological strategies.

Electronic supplementary material

The online version of this article (doi:10.1186/s12913-016-1720-z) contains supplementary material, which is available to authorized users.

Client perspectives on an Aboriginal community led oral health service in rural Australia

OBJECTIVE

An oral health service was implemented, using a unique community development approach, for Northern NSW Australian Aboriginal communities in 2013-14. This study examined the views of children (and parents) who accessed the service, including: the extent of reported dental problems, oral health knowledge, attitudes and behaviour, accessibility of oral health services, satisfaction and cultural sensitivity of the service.

METHODS

A survey of the children who accessed this service was conducted between October 2014 and December 2014.

RESULTS

A total of 49 (71%) Aboriginal children aged 4-14 (or parents of), provided responses to the survey. All agreed that healthy teeth were important (100%), but many thought oral disease leading to extraction was normal (68%). High levels of oral pain were reported (66%), half (53%) reported brushing morning and night. Access to the new dental health service was reported as 'easy' (92%). Many walked (47%) or were driven (35%) in <30 min (90%). All respondents were happy with their dental treatment, and that their Aboriginal heritage was respected by the oral health team (100%).

CONCLUSION

The implementation of a new community led oral health service to Northern NSW Aboriginal communities was shown here to be well-utilised, respected and in an area of high need. The collaborative approach could be continued to be utilised to implement targeted, community led health promotion programs to facilitate and encourage better oral health practices for the Aboriginal children in these communities.

A Critical Review of Grading Systems: Implications for Public Health Policy

Grading instruments are an important part of evidence-based medicine and are used to inform health policy and the development of clinical practice guidelines. They are extensively used in the development of clinical guidelines and the assessment of research publications, having particular impact on health care and policy sectors. The positive effects of using grading instruments are, however, potentially undermined by their misuse and a number of shortcomings. This review found eight key concerns about grading instruments: (1) lack of information on validity and reliability, (2) poor concurrent validity, (3) may not account for external validity, (4) may not be inherently logical, (5) susceptibility to subjectivity, (6) complex systems with inadequate instructions, (7) may be biased toward randomized controlled trial (RCT) studies, and (8) may not adequately address the variety of non-RCTs. This narrative review concludes that there is a need to take into account these criticisms and domain-specific limitations, to enable the use and development of the most appropriate grading instruments. Grading systems need to be matched to both the research question being asked and the type of evidence being used.

Attitudes and beliefs about deceased organ donation in the Arabic-speaking community in Australia: a focus group study

OBJECTIVES

To describe the beliefs and attitudes to organ donation in the Arabic-speaking community.

DESIGN

Arabic-speaking participants were purposively recruited to participate in 6 focus groups. Transcripts were analysed thematically.

PARTICIPANTS

53 participants, aged 19-77 years, and originating from 8 countries, participated in 1 of 6 focus groups. Participants identified as Christian (73%), Islam (26%), Buddhist (2%) or did not identify with any religion (2%).

RESULTS

6 themes (with subthemes) were identified; religious conviction; invisibility of organ donation; medical suspicion; owning the decision; and reciprocal benefit.

CONCLUSIONS

Although organ donation is considered a generous life-saving 'gift', representative members of the Arabic-speaking community in Australia were unfamiliar with, unnerved by and sceptical about the donation process. Making positive decisions about organ donation would likely require resolving tensions between respecting family, community and religious values versus their individual autonomy. Providing targeted education about the process and benefits of organ donation within the Arabic community may clarify ambiguities surrounding cultural and religious-based views on organ donation, reduce taboos and suspicion towards donation, and in turn, lead to increased organ donation rates.

Large-scale discovery of novel genetic causes of developmental disorders

Despite three decades of successful, predominantly phenotype-driven discovery of the genetic causes of monogenic disorders, up to half of children with severe developmental disorders of probable genetic origin remain without a genetic diagnosis. Particularly challenging are those disorders rare enough to have eluded recognition as a discrete clinical entity, those with highly variable clinical manifestations, and those that are difficult to distinguish from other, very similar, disorders. Here we demonstrate the power of using an unbiased genotype-driven approach to identify subsets of patients with similar disorders. By studying 1,133 children with severe, undiagnosed developmental disorders, and their parents, using a combination of exome sequencing and array-based detection of chromosomal rearrangements, we discovered 12 novel genes associated with developmental disorders. These newly implicated genes increase by 10% (from 28% to 31%) the proportion of children that could be diagnosed. Clustering of missense mutations in six of these newly implicated genes suggests that normal development is being perturbed by an activating or dominant-negative mechanism. Our findings demonstrate the value of adopting a comprehensive strategy, both genome-wide and nationwide, to elucidate the underlying causes of rare genetic disorders.

Global systematic review of the cost-effectiveness of indigenous health interventions

BACKGROUND

Indigenous populations around the world have consistently been shown to bear a greater burden of disease, death and disability than their non-Indigenous counterparts. Despite this, little is known about what constitutes cost-effective interventions in these groups. The objective of this paper was to assess the global cost-effectiveness literature in Indigenous health to identify characteristics of successful and unsuccessful interventions and highlight areas for further research.

METHODS AND FINDINGS

A systematic review of the published literature was carried out. MEDLINE, PSYCINFO, ECONLIT, EMBASE and CINAHL were searched with terms to identify cost-effectiveness evaluations of interventions in Indigenous populations around the world. The WHO definition was followed in identifying Indigenous populations. 19 studies reporting on 27 interventions were included in the review. The majority of studies came from high-income nations with only two studies of interventions in low and middle-income nations. 22 of the 27 interventions included in the analysis were found to be cost-effective or cost-saving by the respective studies. There were only two studies that focused on Indigenous communities in urban areas, neither of which was found to be cost-effective. There was little attention paid to Indigenous conceptions of health in included studies. Of the 27 included studies, 23 were interventions that specifically targeted Indigenous populations. Outreach programs were shown to be consistently cost-effective.

CONCLUSION

The comprehensive review found only a small number of studies examining the cost-effectiveness of interventions into Indigenous communities around the world. Given the persistent disparities in health outcomes faced by these populations and commitments from governments around the world to improving these outcomes, it is an area where the health economics and public health fields can play an important role in improving the health of millions of people.

Family perspectives on deceased organ donation: thematic synthesis of qualitative studies

A major barrier to meeting the needs for organ transplantation is family refusal to give consent. This study aimed to describe the perspectives of donor families on deceased donation. We conducted a systematic review and thematic synthesis of qualitative studies. Electronic databases were searched to September 2012. From 34 studies involving 1035 participants, we identified seven themes: comprehension of sudden death (accepting finality of life, ambiguity of brain death); finding meaning in donation (altruism, letting the donor live on, fulfilling a moral obligation, easing grief); fear and suspicion (financial motivations, unwanted responsibility for death, medical mistrust); decisional conflict (pressured decision making, family consensus, internal dissonance, religious beliefs); vulnerability (valuing sensitivity and rapport, overwhelmed and disempowered); respecting the donor (honoring the donor's wishes, preserving body integrity) and needing closure (acknowledgment, regret over refusal, unresolved decisional uncertainty, feeling dismissed). Bereaved families report uncertainty about death and the donation process, emotional and cognitive burden and decisional dissonance, but can derive emotional benefit from the "lifesaving" act of donation. Strategies are needed to help families understand death in the context of donation, address anxieties about organ procurement, foster trust in the donation process, resolve insecurities in decision making and gain a sense of closure.

Structure-Based, Rational Design of T Cell Receptors

Adoptive cell transfer using engineered T cells is emerging as a promising treatment for metastatic melanoma. Such an approach allows one to introduce T cell receptor (TCR) modifications that, while maintaining the specificity for the targeted antigen, can enhance the binding and kinetic parameters for the interaction with peptides (p) bound to major histocompatibility complexes (MHC). Using the well-characterized 2C TCR/SIYR/H-2K(b) structure as a model system, we demonstrated that a binding free energy decomposition based on the MM-GBSA approach provides a detailed and reliable description of the TCR/pMHC interactions at the structural and thermodynamic levels. Starting from this result, we developed a new structure-based approach, to rationally design new TCR sequences, and applied it to the BC1 TCR targeting the HLA-A2 restricted NY-ESO-1_157–165 cancer-testis epitope. Fifty-four percent of the designed sequence replacements exhibited improved pMHC binding as compared to the native TCR, with up to 150-fold increase in affinity, while preserving specificity. Genetically engineered CD8⁺ T cells expressing these modified TCRs showed an improved functional activity compared to those expressing BC1 TCR. We measured maximum levels of activities for TCRs within the upper limit of natural affinity, K_D = ∼1 − 5 μM. Beyond the affinity threshold at K_D < 1 μM we observed an attenuation in cellular function, in line with the “half-life” model of T cell activation. Our computer-aided protein-engineering approach requires the 3D-structure of the TCR-pMHC complex of interest, which can be obtained from X-ray crystallography. We have also developed a homology modeling-based approach, TCRep 3D, to obtain accurate structural models of any TCR-pMHC complexes when experimental data is not available. Since the accuracy of the models depends on the prediction of the TCR orientation over pMHC, we have complemented the approach with a simplified rigid method to predict this orientation and successfully assessed it using all non-redundant TCR-pMHC crystal structures available. These methods potentially extend the use of our TCR engineering method to entire TCR repertoires for which no X-ray structure is available. We have also performed a steered molecular dynamics study of the unbinding of the TCR-pMHC complex to get a better understanding of how TCRs interact with pMHCs. This entire rational TCR design pipeline is now being used to produce rationally optimized TCRs for adoptive cell therapies of stage IV melanoma.

An economic evaluation of intravenous versus oral iron supplementation in people on haemodialysis

BACKGROUND

Iron supplementation can be administered either intravenously or orally in patients with chronic kidney disease (CKD) and iron deficiency anaemia, but practice varies widely. The aim of this study was to estimate the health care costs and benefits of parenteral iron compared with oral iron in haemodialysis patients receiving erythropoiesis-stimulating agents (ESAs).

METHODS

Using broad health care funder perspective, a probabilistic Markov model was constructed to compare the cost-effectiveness and cost-utility of parenteral iron therapy versus oral iron for the management of haemodialysis patients with relative iron deficiency. A series of one-way, multi-way and probabilistic sensitivity analyses were conducted to assess the robustness of the model structure and the extent in which the model's assumptions were sensitive to the uncertainties within the input variables.

RESULTS

Compared with oral iron, the incremental cost-effectiveness ratios (ICERs) for parenteral iron were $74,760 per life year saved and $34,660 per quality-adjusted life year (QALY) gained. A series of one-way sensitivity analyses show that the ICER is most sensitive to the probability of achieving haemoglobin (Hb) targets using supplemental iron with a consequential decrease in the standard ESA doses and the relative increased risk in all-cause mortality associated with low Hb levels (Hb < 9.0 g/dL). If the willingness-to-pay threshold was set at $50,000/QALY, the proportions of simulations that showed parenteral iron was cost-effective compared with oral iron were over 90%.

CONCLUSIONS

Assuming that there is an overall increased mortality risk associated with very low Hb level (<9.0 g/dL), using parenteral iron to achieve an Hb target between 9.5 and 12 g/L is cost-effective compared with oral iron therapy among haemodialysis patients with relative iron deficiency.

Patient preferences for the allocation of deceased donor kidneys for transplantation: a mixed methods study

BACKGROUND

Deceased donor kidneys are a scarce health resource, yet patient preferences for organ allocation are largely unknown. The aim of this study was to determine patient preferences for how kidneys should be allocated for transplantation.

METHODS

Patients on dialysis and kidney transplant recipients were purposively selected from two centres in Australia to participate in nominal/focus groups in March 2011. Participants identified and ranked criteria they considered important for deceased donor kidney allocation. Transcripts were thematically analysed to identify reasons for their rankings.

RESULTS

From six groups involving 37 participants, 23 criteria emerged. Most agreed that matching, wait-list time, medical urgency, likelihood of surviving surgery, age, comorbidities, duration of illness, quality of life, number of organs needed and impact on the recipient's life circumstances were important considerations. Underpinning their rankings were four main themes: enhancing life, medical priority, recipient valuation, and deservingness. These were predominantly expressed as achieving equity for all patients, or priority for specific sub-groups of potential recipients regarded as more "deserving".

CONCLUSIONS

Patients believed any wait-listed individual who would gain life expectancy and quality of life compared with dialysis should have access to transplantation. Equity of access to transplantation for all patients and justice for those who would look after their transplant were considered important. A utilitarian rationale based on maximizing health gains from the allocation of a scarce resource to avoid "wastage," were rarely expressed. Organ allocation organisations need to seek input from patients who can articulate preferences for allocation and advocate for equity and justice in organ allocation.

Mechanics of myosin function in white muscle fibres of the dogfish, Scyliorhinus canicula

The contractile properties of muscle fibres have been extensively investigated by fast perturbation in sarcomere length to define the mechanical characteristics of myofilaments and myosin heads that underpin refined models of the acto-myosin cycle. Comparison of published data from intact fast-twitch fibres of frog muscle and demembranated fibres from fast muscle of rabbit shows that stiffness of the rabbit myosin head is only ∼62% of that in frog. To clarify if and how much the mechanical characteristics of the filaments and myosin heads vary in muscles of different animals we apply the same high resolution mechanical methods, in combination with X-ray diffraction, to fast-twitch fibres from the dogfish (Scyliorhinus canicula). The values of equivalent filament compliance (C_f) measured by X-ray diffraction and in mechanical experiments are not significantly different; the best estimate from combining these values is 17.1 ± 1.0 nm MPa⁻¹. This value is larger than C_f in frog, 13.0 ± 0.4 nm MPa⁻¹. The longer thin filaments in dogfish account for only part of this difference. The average isometric force exerted by each attached myosin head at 5°C, 4.5 pN, and the maximum sliding distance accounted for by the myosin working stroke, 11 nm, are similar to those in frog, while the average myosin head stiffness of dogfish (1.98 ± 0.31 pN nm⁻¹) is smaller than that of frog (2.78 ± 0.30 pN nm⁻¹). Taken together these results indicate that the working stroke responsible for the generation of isometric force is a larger fraction of the total myosin head working stroke in the dogfish than in the frog.