Treatment Efficacy Outcomes Combining Dual Checkpoint Immunotherapy with Ablative Radiation to All Sites of Oligometastatic Non-Small Cell Lung Cancer: Survival Analysis of a Phase IB trial

PURPOSE/OBJECTIVE(S)

Aggressivelocal treatment to a limited number of metastatic sites in patients with oligometastatic NSCLC increases progression free survival (PFS) and overall survival (OS). Prior studies have shown the safety of combining high dose stereotactic body radiation therapy (SBRT) with single agent anti-PD1/PD-L1 therapy. Here, we report secondary survival endpoint outcomes from a phase Ib clinical trial investigating the safety of combining ablative, high dose radiation with dual checkpoint, anti-CTLA-4 and anti-PD-L1 immunotherapy for patients with oligometastatic NSCLC.

MATERIALS/METHODS

Patients with up to 6 sites of extracranial metastatic disease were eligible for trial enrollment. All sites of disease were treated with stereotactic body radiation therapy to a dose of 30 - 50 Gy in 5 fractions. Dual checkpoint immunotherapy was started 7 days following completion of radiation utilizing anti-CTLA-4 (Tremelimumab) and anti-PD-L1 (Durvalumab) immunotherapy for a total of four cycles followed by durvalumab alone until dose limiting toxicity or progression was observed. Primary toxicity outcomes were previously reported. Progression free and overall survival was analyzed using Kaplan Meier statistical methods.

RESULTS

Fifteen patients were treated with SBRT and received at least one dose of dual agent immunotherapy per protocol. The median follow up was 43 months. The median number of extracranial metastatic sites was 2. Seven patients had 3 or more sites of extracranial disease. The most commonly treated sites were separate metastatic pulmonary lesions or osseous metastatic lesions. Median progression free survival (PFS) was 42 months and median overall survival (OS) was 48 months. Seven patients remain alive without evidence of progressive disease. Prior history of brain metastases was associated with significantly worse PFS (Median PFS 4 months vs 42 months, HR 6.1 (95% CI 1.6 - 37.0) p = 0.0248), but no difference in OS (Median OS 24 vs 42 months, HR 1.9 (95% CI 0.3 - 10.4).

CONCLUSION

Ablative SBRT radiation to up to 6 sites of disease followed by dual checkpoint immunotherapy in oligometastatic NSCLC resulted in a favorable progression free survival (42 months) and overall survival (48 months) compared to historical controls. These findings suggest potential benefit to patient outcomes compared to immunotherapy or radiation alone in this patient population and warrant further investigation.

Antibody landscape of C57BL/6 mice cured of B78 melanoma via immunotherapy

Hoefges et al. utilized a whole-proteome peptide array approach to show that C57BL/6 mice develop a large repertoire of antibodies against linear peptide sequences of their melanoma after receiving a curative immunotherapy regimen consisting of radiation and an immunocytokine. Antibodies can play an important role in innate and adaptive immune responses against cancer, and in preventing infectious disease. Flow cytometry analysis of sera of immune mice that were previously cured of their melanoma through a combined immunotherapy regimen with long-term memory showed strong antibody-binding against melanoma tumor cell lines. Using a high-density whole-proteome peptide array, we assessed potential protein-targets for antibodies found in immune sera. Sera from 6 of these cured mice were analyzed with this high-density, whole-proteome peptide array to determine specific antibody-binding sites and their linear peptide sequence. We identified thousands of peptides that were targeted by 2 or more of these 6 mice and exhibited strong antibody binding only by immune, not naive sera. Confirmatory studies were done to validate these results using 2 separate ELISA-based systems. To the best of our knowledge, this is the first study of the "immunome" of protein-based epitopes that are recognized by immune sera from mice cured of cancer via immunotherapy.

Getting the most out of knowledge and innovation transfer agents in health care: a qualitative study

Background

Knowledge and innovation transfer (KIT) is recognised internationally as a complex, dynamic process that is difficult to embed in organisations. There is growing use of health service–academic–industry collaborations in the UK, with knowledge brokers linking producers with the users of knowledge and innovation.

Aim

Focusing on KIT ‘agent’ roles within Academic Health Science Networks in England and Partnerships in Wales, we show how individual dispositions, processes and content contribute to desired outcomes.

Methods

We studied the KIT intentions of all Academic Health Science Networks in England, and the South East Wales Academic Health Science Partnership. Using a qualitative case study design, we studied the work of 13 KIT agents purposively sampled from five networks, by collecting data from observation of meetings, documentation, KIT agent audio-diaries, and semistructured interviews with KIT agents, their line managers and those they supported (‘Links’). We also used a consensus method in a meeting of experts (nominal group technique) to discuss the measurement of outcomes of KIT agent activity.

Findings

The case study KIT agents were predominantly from a clinical background with differing levels of experience and expertise, with the shared aim of improving services and patient care. Although outside of recognised career structures, the flexibility afforded to KIT agents to define their role was an enabler of success. Other helpful factors included (1) time and resources to devote to KIT activity; (2) line manager support and a team to assist in the work; and (3) access and the means to use data for improvement projects. The organisational and political context could be challenging. KIT agents not only tackled local barriers such as siloed working, but also navigated shifting regional and national policies. Board-level support for knowledge mobilisation together with a culture of reflection (listening to front-line staff), openness to challenges and receptivity to research all enabled KIT agents to achieve desired outcomes. Nominal group findings underscored the importance of relating measures to specific intended outcomes. However, the case studies highlighted that few measures were employed by KIT agents and their managers. Using social marketing theory helped to show linkages between processes, outcomes and impact, and drew attention to how KIT agents developed insight into their clients’ needs and tailored work accordingly.

Limitations

Level of KIT agent participation varied; line managers and Links were interviewed only once; and outcomes were self-reported.

Conclusions

Social marketing theory provided a framework for analysing KIT agent activity. The preparatory work KIT agents do in listening, understanding local context and building relationships enabled them to develop ‘insight’ and adapt their ‘offer’ to clients to achieve desired outcomes.

Future work

The complexity of the role and the environment in which it is played out justifies more research on KIT agents. Suggestions include (1) longitudinal study of career pathways; (2) how roles are negotiated within teams and how competing priorities are managed; (3) how success is measured; (4) the place of improvement methodologies within KIT work; (5) the application of social marketing theory to comparative study of similar roles; and (6) patients as KIT agents.

Funding

The National Institute for Health Research Health Services and Delivery Research programme.

Drug misuse treatment services in Scotland: predicting outcomes

OBJECTIVE

To investigate which aspects of treatment satisfaction are the best predictors of improved health, improved mental health and achievement of abstinence in drug misuse treatment services.

DESIGN

Data were collected as part of the Drug Outcome Research in Scotland study, a prospective cohort study designed to evaluate drug misuse treatment provided in Scotland. Data were collected using a structured interview. Participants were recruited between 1 October 2001 and 30 June 2002. Follow-up interviews were carried out approximately 8 months later. Logistic regression analysis is used to explore client satisfaction with treatment on outcomes, using the Treatment Perceptions Questionnaire (discussed in Marsden et al., Assessing client satisfaction with treatment for substance use problems and the development of the Treatment Perceptions Questionnaire (TPQ). Addict Res 2000;8:455-70).

SETTING

Prison, residential and community facilities.

PARTICIPANTS

A total of 841 drug users starting a new episode of drug treatment in Scotland in 2000-01.

INTERVENTIONS

Methadone, substitute drugs other than methadone, residential rehabilitation, residential detoxification and non-clinical.

MAIN OUTCOME MEASURES

Reported improvements in physical health, mental health and abstinence.

RESULTS

Client satisfaction predicted positive outcomes, independent of treatment setting. Predicting abstinence and improved physical and mental health were the items: 'I have received the help that I was looking for' and 'The staff have helped to motivate me to sort out my problems'.

CONCLUSIONS

Feeling that treatment is appropriate, finding staff motivating, and having enough time to sort out problems are important aspects of satisfaction with treatment among users of drug treatment services who achieved positive treatment outcomes. Services should seek to provide more individualized services based on understanding of individual client needs. This may require longer treatment periods and greater client involvement.

Recommendations for improving the assessment of postgraduate dental education

This paper makes recommendations for the improvement of assessment in postgraduate dental education. The recommendations are based on a twelve-month study conducted in 1998/99 which evaluated the strengths and weaknesses of the existing assessment systems. Evidence was taken from examination syllabi, assessments and records. Semi-structured interviews were conducted with representatives from national bodies and with trainers and trainees in the West Midlands. Strengths in parts of the system include: commitment and professional experience; commissioned work; opportunity to share experience; a monitoring framework; procedures for maintaining standards and examples of broadbased assessments. Weaknesses include: lack of assessment of quality; existence of some forms of unregulated assessment; lack of transparency and lack of clarity between training and assessment. Development is recommended in three broad areas: a competence-based model of assessment; distinguishing assessment from the analysis of educational needs and quality assurance. The introduction of a competence-based model is the most significant and is addressed in some detail. Specific proposals for consideration by national regulatory bodies and education providers include: strengthening the management of assessment; national leadership in the development of a competence model of assessment; widening the assessment base; clearer criteria for inspection; revisions to how vocational training, HO/SHO training and general professional training are assessed and training for trainers.

Assessment in postgraduate dental education: an evaluation of strengths and weaknesses

This paper describes a study designed to evaluate assessment in postgraduate dental education in England, identifying strengths and weaknesses and focusing specifically on its relevance, consistency and cost-effectiveness.

METHODS

A four-phase qualitative method was used: a mapping of current career paths, assessment policy, and issues (phase 1); more detailed studies of the practice of assessment for a range of courses, and the systemic/management perspective of assessment (i.e. quality assurance) (phases 2 and 3), and analysis and reporting (phase 4). Data were analysed from documents, interviews, group consultations and observations.

RESULTS AND DISCUSSION

Five key issues may be distilled from the findings: (i) lack of formal assessment of general professional training; (ii) trainer variation in assessment; (iii) the extent to which assessments are appropriate indicators of later success; (iv) the relationship between assessment and patient care, and (v) data to assess the costs of assessment.

CONCLUSION

Current assessment procedures might be improved if consideration is given to: assessment which supports an integrated period of general professional training; training for trainers and inspection procedures to address variation; more authentic assessments, based directly on clinical work and grading cases and posts, and better data on allocation of resources, in particular clinicians' time given to assessment.

The benefits and costs of continuing professional development (CPD) for general dental practice: a discussion

This paper sets out the benefits and costs of continuing professional development (CPD) for general dental practice. These considerations are important in evaluating CPD yet they are rarely formally assessed. This paper draws on literature specifically on dentistry but also from across the medical profession and the economics of education and training. First, the costs of CPD are itemised with some suggestions as to how costs may be reduced. Second, the benefits are identified and the (limited) evidence on the value of CPD is surveyed. Finally, reasons why some GDPs might not undertake sufficient or appropriate CPD are explored and the need for guidance for dental practitioners is identified.

A role for clinical audit and peer review in the identification of continuing professional development needs for general dental practitioners: a discussion

The purpose of this paper is to discuss how the role of peer review and clinical audit may be used in the identification of the continuing professional development (CPD) needs of general dental practitioners (GDPs). Clinical audit and peer review are intrinsically valuable in terms of the continued professional development of GDPs. Collaborative clinical audit, in particular, can provide a framework for short course input and there are particular benefits to this combination of activities which might usefully be more widely encouraged. If open to analysis in a way which retains individual anonymity, peer review and clinical audit resumes, these could be used to inform the provision of CPD and, linked to the knowledge of audit facilitators, short courses might more closely match the CPD needs of local dentists.

A framework for the evaluation of continuing education short courses in dentistry

The objective of this paper is to propose an evaluation framework for short courses in continuing education for general dental practitioners (GDPs) (so called, Section 63 courses). Existing monitoring and evaluation procedures in the West Midlands deanery were examined and an improved evaluation framework was then devised, piloted and revised. A 5 phase method was used incorporating the examination of existing practice (Phases 1 and 2), development of a new framework (Phase 3), piloting (Phase 4) and revision of the evaluation framework in the light of the pilot. This approach will be implemented in the West Midlands and may be adapted for national use (Phase 5). It was found that existing monitoring and evaluation was inconsistent in prevalence and scope. Those involved in short courses were in favour of a more consistent and visible evaluation, including some assessment of impact-on-practice and cost-effectiveness. In conclusion, meaningful evaluation needs to include four key processes: data gathering; data analysis; dissemination and, action planning (reviewing provision in the light of the data analysis). Thus, this evaluation framework feeds into a quality development cycle designed to ensure high quality and relevant short course provision for general dental practitioners.