Long term activity of vemurafenib in cancers with BRAF mutations: the ACSE basket study for advanced cancers other than BRAFV600-mutated melanoma

BACKGROUND

BRAF inhibitors are approved in BRAFV600-mutated metastatic melanoma, non-small-cell lung cancer (NSCLC), Erdheim-Chester disease (ECD), and thyroid cancer. We report here the efficacy, safety, and long-term results of single-agent vemurafenib given in the AcSé vemurafenib basket study to patients with various BRAF-mutated advanced tumours other than BRAFV600-mutated melanoma and NSCLC.

PATIENTS AND METHODS

Patients with advanced tumours other than BRAFV600E melanoma and progressing after standard treatment were eligible for inclusion in nine cohorts (including a miscellaneous cohort) and received oral vemurafenib 960 mg two times daily. The primary endpoint was the objective response rate (ORR) estimated with a Bayesian design. The secondary outcomes were disease control rate, duration of response, progression-free survival (PFS), overall survival (OS), and vemurafenib safety.

RESULTS

A total of 98 advanced patients with various solid or haematological cancers, 88 with BRAFV600 mutations and 10 with BRAFnonV600 mutations, were included. The median follow-up duration was 47.7 months. The Bayesian estimate of ORR was 89.7% in hairy cell leukaemias (HCLs), 33.3% in the glioblastomas cohort, 18.2% in cholangiocarcinomas, 80.0% in ECD, 50.0% in ovarian cancers, 50.0% in xanthoastrocytomas, 66.7% in gangliogliomas, and 60.0% in sarcomas. The median PFS of the whole series was 8.8 months. The 12-, 24-, and 36-month PFS rates were 42.2%, 23.8%, and 17.9%, respectively. Overall, 54 patients died with a median OS of 25.9 months, with a projected 4-year OS of 40%. Adverse events were similar to those previously reported with vemurafenib.

CONCLUSION

Responses and prolonged PFS were observed in many tumours with BRAF mutations, including HCL, ECD, ovarian carcinoma, gliomas, ganglioglioma, and sarcomas. Although not all cancer types responded, vemurafenib is an agnostic oncogene therapy of cancers.

Disease-specific wearable sensor algorithms for profiling activity, gait, and balance in individuals with Charcot-Marie-Tooth disease type 1A

BACKGROUND/AIMS

Charcot-Marie-Tooth Disease type 1A (CMT1A), the most common inherited peripheral neuropathy, is characterized by progressive sensory loss and weakness, which results in impaired mobility. Increased understanding of the genetics and pathophysiology of CMT1A has led to development of potential therapeutic agents, necessitating clinical trial readiness. Wearable sensors may provide useful outcome measures for future trials.

METHODS

Individuals with CMT1A and unaffected controls were recruited for this 12-month study. Participants wore sensors for in-clinic assessments and at-home, from which activity, gait, and balance metrics were derived. Mann-Whitney U tests were used to analyze group differences for activity, gait, and balance parameters. Test-retest reliability of gait and balance parameters and correlations of these parameters with clinical outcome assessments (COAs) were examined.

RESULTS

Thirty individuals, 15 CMT1A, and 15 controls, participated. Gait and balance metrics demonstrated moderate to excellent reliability. CMT1A participants had longer step durations (p < .001), shorter step lengths (p = .03), slower gait speeds (p < .001), and greater postural sway (p < .001) than healthy controls. Moderate correlations were found between CMT-Functional Outcome Measure and step length (r = -0.59; p = .02), and gait speed (r = 0.64; p = .01); 11 out of 15 CMT1A participants demonstrated significant increases in stride duration between the first and last quarter of the 6-min walk test, suggesting fatigue.

INTERPRETATION

In this initial study, gait and balance metrics derived from wearable sensors were reliable and associated with COAs in individuals with CMT1A. Larger longitudinal studies are needed to confirm our findings and evaluate sensitivity and utility of these disease-specific algorithms for clinical trial use.

Transitions in mental health and addiction care for youth and their families: a scoping review of needs, barriers, and facilitators

INTRODUCTION

Transitional-aged youth (TAY) with mental health and/or addictions (MHA) concerns and their families experience significant challenges finding, accessing, and transitioning through needed MHA care. To develop appropriate supports that assist TAY and their families in navigating MHA care, their experiences of transitions in the MHA care system must be better understood. This scoping review identifies and explores the needs, barriers, and facilitators for TAY and their families when transitioning through MHA care.

METHODS

This scoping review commenced with a search of five relevant databases. Three research team members were involved in title, abstract, and full-text scanning and data extraction. Sources focusing on TAY anywhere between the ages of 12-29 years and meeting the study objectives were included. Extractions compiled background and narrative information about the nature and extent of the data. Analysis and synthesis of findings involved numerical description of the general information extracted (e.g., numbers of sources by country) and thematic analysis of narrative information extracted (e.g., family involvement in TAY help-seeking).

RESULTS

A total of 5894 sources were identified. Following title and abstract scanning, 1037 sources remained for full-text review. A total of 66 sources were extracted. Findings include background information about extracted sources, in addition to five themes that emerged pertaining to barriers and facilitators to access and transitions through care and the needs and roles of TAY and families in supporting help-seeking and care transitions: holistic supports, proactive preparation, empowering TAY and families, collaborative relationships, and systemic considerations. These five themes demonstrate approaches to care that can ensure TAY and families' needs are met, barriers are mitigated, and facilitators are enhanced.

CONCLUSION

This review provides essential contextual information regarding TAY with MHA concerns and their families' needs when seeking care. Such findings lend to an enhanced understanding of how MHA programs can support this population's needs, involve family members as appropriate, reduce the barriers experienced, and work to build upon existing facilitators.

Acute food deprivation-induced relapse to heroin seeking after short and long punishment-imposed abstinence in male rats

RATIONAL

Stress is a major trigger for drug relapse in humans and animal models, even after prolonged abstinence. However, animal models for stress-induced relapse were criticized for the lack of predictive and face validity.

OBJECTIVES

Here we investigated the effect of acute food deprivation stress in a novel stress-induced relapse model using voluntary, punishment-imposed abstinence from heroin. We also performed a detailed characterization of the development of punishment-imposed abstinence.

METHODS

Male rats were trained to self-administered heroin (0.1 mg/kg/infusion) for 2 weeks, using the seeking-taking chained schedule. Pressing the 'seeking' lever led to the insertion of the 'taking' lever and pressing the take lever resulted in heroin infusion. Following self-administration training, rats were exposed to 8 or 21 days of heroin-seeking punishment. During punishment, 30% of the completed seek links resulted in a mild escalating footshock instead of take lever presentation. Next, rats were tested for heroin seeking under extinction conditions after 24 h of food deprivation and sated conditions.

RESULTS

Probabilistic punishment of seeking lever responses resulted in gradual suppression of heroin seeking and taking. Exposure to food-deprivation stress induced a robust relapse to heroin seeking after short and long punishment-imposed abstinence periods, without significant effects of time, i.e., no incubation of heroin seeking. Individual differences were observed in the development of punishment-induced abstinence and stress-induced relapse.

CONCLUSIONS

These results suggest that stress is a reliable trigger to relapse even after a prolonged period of punishment-induced, voluntary abstinence.

Exercise priming with transcranial direct current stimulation: a study protocol for a randomized, parallel-design, sham-controlled trial in mild cognitive impairment and Alzheimer's disease

Background

Transcranial direct current stimulation (tDCS) is a non-invasive type of brain stimulation that uses electrical currents to modulate neuronal activity. A small number of studies have investigated the effects of tDCS on cognition in patients with Mild Cognitive Impairment (MCI) and Alzheimer’s disease (AD), and have demonstrated variable effects. Emerging evidence suggests that tDCS is most effective when applied to active brain circuits. Aerobic exercise is known to increase cortical excitability and improve brain network connectivity. Exercise may therefore be an effective, yet previously unexplored primer for tDCS to improve cognition in MCI and mild AD.

Methods

Participants with MCI or AD will be randomized to receive 10 sessions over 2 weeks of either exercise primed tDCS, exercise primed sham tDCS, or tDCS alone in a blinded, parallel-design trial. Those randomized to an exercise intervention will receive individualized 30-min aerobic exercise prescriptions to achieve a moderate-intensity dosage, equivalent to the ventilatory anaerobic threshold determined by cardiopulmonary assessment, to sufficiently increase cortical excitability. The tDCS protocol consists of 20 min sessions at 2 mA, 5 times per week for 2 weeks applied through 35 cm² bitemporal electrodes. Our primary aim is to assess the efficacy of exercise primed tDCS for improving global cognition using the Montreal Cognitive Assessment (MoCA). Our secondary aims are to evaluate the efficacy of exercise primed tDCS for improving specific cognitive domains using various cognitive tests (n-back, Word Recall and Word Recognition Tasks from the Alzheimer’s Disease Assessment Scale-Cognitive subscale) and neuropsychiatric symptoms (Neuropsychiatric Inventory). We will also explore whether exercise primed tDCS is associated with an increase in markers of neurogenesis, oxidative stress and angiogenesis, and if changes in these markers are correlated with cognitive improvement.

Discussion

We describe a novel clinical trial to investigate the effects of exercise priming before tDCS in patients with MCI or mild AD. This proof-of-concept study may identify a previously unexplored, non-invasive, non-pharmacological combination intervention that improves cognitive symptoms in patients. Findings from this study may also identify potential mechanistic actions of tDCS in MCI and mild AD.

Trial registration

Clinicaltrials.gov, NCT03670615. Registered on September 13, 2018.

Delivery of Community Support Services for Older Adults in Social Housing

Community support services are an integral component of aging in place. In social housing, older adult tenants struggle to access these services due to the siloed nature of housing and health services. This study aims to describe the relationship between community support services and social housing for older adults and examine ways to optimize delivery. Data on government-funded community support services delivered to 74 seniors’ social housing buildings in Toronto, Ontario was analyzed. Neighbourhood profile data for each building was also collected, and correlational analyses were used to examine the link between neighbourhood characteristics and service delivery. Fifty-six community agencies provided 5,976 units of services across 17 service categories, most commonly mental health supports, case management and congregate dining. On average, each building was supported by nine agencies that provided 80 units of service across 10 service categories. Buildings in neighbourhoods with a higher proportion of low-income older adults had more agencies providing on-site services (r = .275, p < .05), while those in neighbourhoods with more immigrants (r = -.417, p < .01), non-English speakers (r = -.325, p < .01), and visible minorities (r = -.381, p < .01) received fewer services. Findings point to a lack of coordination between service providers, with multiple agencies offering duplicative services within the same building. Vulnerable seniors from equity-seeking groups, including those who do not speak English and recent immigrants, may be excluded from many services, and future service delivery for seniors should strive to address disparities in availability and access.

Natural History of Perianal Fistulising Lesions in Patients With Elderly-onset Crohn's Disease: A Population-based Study

INTRODUCTION

Most studies of elderly-onset Crohn's disease [CD; diagnosed in patients aged 60 or over] have described a mild course. However, data on the natural history of perianal fistulising CD [pfCD] in this population are scarce. In a population-based cohort study, we described the prevalence, natural history, and treatment of pfCD in patients with elderly-onset CD vs patients with paediatric-onset CD.

METHOD

All patients diagnosed with CD at or after the age of 60 between 1988 and 2006, were included [n = 372]. Logistic regression, Cox models, and a nested case-control method were used to identify factors associated with pfCD.

RESULTS

A total of 34 elderly patients [9% of the 372] had pfCD at diagnosis. After a median follow-up of 6 years (interquartile range [IQR]: 3; 10), 59 patients [16%] had pfCD; the same prevalence [16%] was observed in paediatric-onset patients. At last follow-up, anal incontinence was more frequent in elderly patients with pfCD than in elderly patients without pfCD [22% vs 4%, respectively; p < 10-4]. Rectal CD at diagnosis was associated with pfCD: hazard ratio (95% confidence interval [CI] = 2.8 [1.6-5.0]). Although 37% of the patients received immunosuppressants and 17% received anti-tumour necrosis factor agents, 24% [14 out of 59] had a definitive stoma at last follow-up.

CONCLUSION

During the first 6 years of disease, the prevalence of pfCD was similar in elderly and paediatric patients. Rectal involvement was associated with the appearance of pfCD in elderly-onset patients. Around a quarter of patients with elderly-onset CD will have a stoma. Our results suggest that treatment with biologics should be evaluated in these patients.

[Digital ischaemia with fingertip ulcers during ipilimumab therapy]

BACKGROUND

Anti-cancer drugs have many adverse effects including vascular side effects. Herein we present the case of a patient presenting digital ischaemia with high imputability of ipilimumab.

OBSERVATION

A 47-year-old male patient was treated for popliteal melanoma, initially stage IIIA but which subsequently became metastatic (stage IV), and for which ipilimumab was given after the failure of two lines of chemotherapy. During the 4th course of ipilimumab, the patient developed autoimmune hepatitis. Ipilimumab was suspended. Three months later, he developed a drug-like neuropathy followed one month later by ulceration of the right index finger. Causes of embolic, autoimmune and occupational origin (thrombotic microangiopathy, thrombosed aneurysm) were rapidly ruled out. Although a paraneoplastic origin could not be formally excluded, drug-induced immune disorder remained the most plausible origin.

DISCUSSION

This is the first reported case of digital ulceration under ipilimumab.

Connecting People With Multimorbidity to Interprofessional Teams Using Telemedicine

PURPOSE

Most models for managing chronic disease focus on single diseases. Managing patients with multimorbidity is an increasing challenge in family medicine. We evaluated the feasibility of a novel approach to caring for patients with multimorbidity, performing a case study of TIP-Telemedicine IMPACT (Interprofessional Model of Practice for Aging and Complex Treatments) Plus-a 1-time interprofessional consultation with primary care physicians (PCPs) and their patients in Toronto, Canada.

METHODS

We assessed feasibility of the TIP model from the number of referrals from PCPs and emergency departments in Toronto, Canada; the intervention cost; and the satisfaction of patients, PCPs, and team members with the new model. One patient and PCP story highlights the model's impact. We also performed thematic analysis of written feedback.

RESULTS

A total of 76 patients were referred from 53 PCPs and 4 emergency departments, and 65 PCPs participated in TIP. All 74 patient survey respondents indicated TIP improved their access to interdisciplinary resources, and 97% reported feeling hopeful their conditions would improve as a result. Of 21 PCP survey respondents, 100% reported they would use TIP again, and 90% reported improved confidence in managing their patient's care. Of 87 team member survey respondents, 97% rated TIP as effective. Qualitative findings indicated benefits to both patients and health professionals. The cost was about 22% less than that of a 1-day hospital admission through the emergency department (C$854 vs C$1,088).

CONCLUSIONS

TIP is a feasible intervention in multiple primary care settings that gives patients an active role in their health management, supported by their team. The model effectively addresses the needs of the most complex patients and their PCPs.

Communication technology adoption among older adult veterans: the interplay of social and cognitive factors

OBJECTIVES

InTouch is an electronic communication platform designed to be accessible by computer-naive seniors. The present study explored the process of adoption and use of the application by seniors with and without mild cognitive impairment (MCI) through the lens of Social Cognitive Theory (SCT).

METHOD

We studied adoption and use of InTouch for social communication over a 12-week period in a 475-bed Veteran's care facility at Sunnybrook Health Sciences Centre in Toronto, Canada. Eleven older adult veterans participated, six of whom had MCI, as indicated by their Montreal Cognitive Assessment score. Veterans were partnered with volunteers, each was provided with an iPad with the InTouch application. Qualitative data were collected through interviews, field notes, and direct observation. Quantitative data were collected from data logging of the software and medical charts. Data types and sources were triangulated and examined through the lens of SCT.

RESULTS

A total of 2361 messages (102 videos, 359 audios, 417 photos, 1438 texts) were sent by 10 of the 11 veterans over the 12-week study period. There was no apparent difference in extent of adoption or use, between participants with and without MCI. Participants used various resources and techniques to learn, provided that they felt motivated to connect with others using the app.

CONCLUSION

This pilot illustrates both the accessibility of InTouch and the promise of using extrinsic motivators such as social bonding to promote learning in institutionalized older adults with and without cognitive impairment, whose intrinsic motivation and self-efficacy may well be suffering.

Dramatic Increase in Incidence of Ulcerative Colitis and Crohn's Disease (1988-2011): A Population-Based Study of French Adolescents

OBJECTIVES

Few data are available to describe the changes in incidence of pediatric-onset inflammatory bowel disease (IBD). The aim of this study was to describe changes in incidence and phenotypic presentation of pediatric-onset IBD in northern France during a 24-year period.

METHODS

Pediatric-onset IBD (<17 years) was issued from a population-based IBD study in France between 1988 and 2011. Age groups and digestive location were defined according to the Paris classification.

RESULTS

1,350 incident cases were recorded (8.3% of all IBD) including 990 Crohn's disease (CD), 326 ulcerative colitis (UC) and 34 IBD unclassified (IBDU). Median age at diagnosis was similar in CD (14.4 years (Q1=11.8-Q3=16.0)) and UC (14.0 years (11.0-16.0)) and did not change over time. There were significantly more males with CD (females/males=0.82) than UC (females/males=1.25) (P=0.0042). Median time between onset of symptoms and IBD diagnosis was consistently 3 months (1-6). Mean incidence was 4.4/10⁵ for IBD overall (3.2 for CD, 1.1 for UC and 0.1 for IBDU). From 1988-1990 to 2009-2011, a dramatic increase in incidences of both CD and UC were observed in adolescents (10-16 years): for CD from 4.2 to 9.5/10⁵ (+126%; P<0.001) and for UC, from 1.6 to 4.1/10⁵ (+156%; P<0.001). No modification in age or location at diagnosis was observed in either CD or UC.

CONCLUSIONS

In this population-based study, CD and UC incidences increased dramatically in adolescents across a 24-year span, suggesting that one or more strong environmental factors may predispose this population to IBD.

Extra-intestinal Manifestations at Diagnosis in Paediatric- and Elderly-onset Ulcerative Colitis are Associated With a More Severe Disease Outcome: A Population-based Study

BACKGROUND AND AIMS

Data on extra-intestinal manifestations [EIM] and their impact on the disease course of ulcerative colitis [UC] in population-based cohorts are scarce, particularly in paediatric- and elderly-onset UC patients. The aims of this population-based study were to assess: 1] the occurrence of EIM in paediatric- and elderly-onset UC; 2] the factors associated with EIM; and 3] their impact on long-term disease outcome.

METHODS

Paediatric-onset [< 17 years at diagnosis] and elderly-onset UC patients [> 60 years at diagnosis] from a French prospective population-based registry [EPIMAD] were included. Data on EIM and other clinical factors at diagnosis and at maximal follow-up were collected.

RESULTS

In all, 158 paediatric- and 470 elderly-onset patients were included [median age at diagnosis 14.5 and 68.8 years, median follow-up 11.2 and 6.2 years, respectively]. EIM occurred in 8.9% of childhood- and 3% of elderly-onset patients at diagnosis and in 16.7% and 2.2% of individuals during follow-up [p < 0.01], respectively. The most frequent EIM was joint involvement [15.8% of paediatric onset and 2.6% of elderly-onset]. Presence of EIM at diagnosis was associated with more severe disease course [need for immunosuppressants or biologic therapy or colectomy] in both paediatric- and elderly-onset UC (hazard ratio [HR] = 2.0, 95% confidence interval [CI]: 1.0-4.2; and HR = 2.8, 0.9-7.9, respectively). Extensive colitis was another independent risk factor in both age groups.

CONCLUSIONS

Elderly-onset UC patients had lower risk of EIM either at diagnosis or during follow-up than paediatric-onset individuals. EIM at diagnosis predicted more severe disease outcome, including need for immunosuppressive or biologic therapy or surgery, in both paediatric- and elderly-onset UC.

Effect of comorbidities and medications on frequency of primary care visits among older patients

OBJECTIVE

To determine if comorbidities and high-risk medications affect the frequency of family physician visits among older patients.

DESIGN

Retrospective chart review.

SETTING

Academic family health team at Sunnybrook Health Sciences Centre in Toronto, Ont.

PARTICIPANTS

Among patients aged 65 years and older who were registered patients of the family health team between July 1, 2013, and June 30, 2014, the 5% who visited their family physicians most frequently and the 5% who visited their family physicians least frequently were selected for the study (N = 265).

MAIN OUTCOME MEASURES

Predictors of frequent visits to family physicians.

RESULTS

The significant predictors of being a high-frequency user were female sex (odds ratio [OR] = 2.20, P = .03), age older than 85 years (OR = 5.35, P = .001), and higher total number of medications (OR = 1.49, P < .001). Age-adjusted Charlson comorbidity index score, number of Beers criteria medications, and Anticholinergic Risk Scale score were not significant predictors (P > .05).

CONCLUSION

Female sex, age older than 85, and higher total number of medications were independent significant predictors of higher frequency of family physician visits among older patients. Validated tools, such as the Charlson comorbidity index, Beers criteria, and Anticholinergic Risk Scale, did not independently predict the frequency of visits, indicating that predicting frequency of visits is likely complex.

Self-report measures of well-being predict incident harm due to self-neglect in cognitively impaired seniors who live alone

BACKGROUND

Primary care physicians (PCPs) increasingly must identify which of their cognitively impaired patients who live alone are at greatest risk of harm due to self-neglect.

OBJECTIVES

To determine whether brief patient self-report measures could accurately do this.

METHODS

Participants were ≥65 years, lived alone, and recruited from PCPs' practices, community agencies, a hospital emergency department, and acute care medical units. All had cognitive impairment (≤130 on the Dementia Rating Scale) and all had a PCP. Baseline self-report measures included: Geriatric Depression Scale (GDS), a social resources scale, a single item health rating scale, and the Quality of Life-Alzheimer's Disease Scale. We adjusted for baseline demographic, health, and mental status differences. We prospectively captured incidents of harm involving self-neglect or disorientation, resulting in physical injury, property loss, or damage, and requiring emergency services. These were obtained over a one-year longitudinal period, at 3-month intervals, from PCPs and caregivers. Emergency service records were obtained and reviewed for each incident. Proportional hazards modeling estimated how well the self-report measures predicted time to the first incident harm.

RESULTS

190 women and 34 men were followed. Based on the agreement of three medical raters, 23 participants (10%) experienced harmful outcomes. Being depressed on the GDS and rating one's health as fair or poor were the only two measures that significantly shortened time to first harmful outcome.

CONCLUSION

GDS and self-rated health are simple measures to administer in the primary care setting and may be useful to PCPs in the earlier identification of those at greatest risk of harm in this vulnerable group of patients.

[Acantholytic dermatosis in patients treated by vemurafenib: 2 cases]

BACKGROUND

Acantholytic dyskeratosis under BRAF inhibitors are dermatological diseases rarely reported to date.

PATIENTS AND METHODS

We report 2 cases of acantholytic dyskeratosis, reaching the trunk and the seborrheic zones, not itchy, appeared one month after the introduction of vemurafenib. The histological analysis was typical of a "Grover-like rash" for the 2 patients.

DISCUSSION

The appearance of acantholytic dyskeratosis under vemurafenib, a BRAF inhibitor, seems related with a paradoxical activation of the MAP-kinases pathway and with a growth acceleration of lesions in which RAS mutations of keratinocytes. Theses dermatoses seem also to occur with dabrafenib.

CONCLUSION

The patients treated by BRAF inhibitors (vemurafenib and dabrafenib) can present acantholytic dyskeratosis. The arisen of this mild dermatosis does not question, of course, the continuation of the treatment. These cutaneous manifestations can be managed with emollients.