Cognitive inhibition deficit in long COVID-19: An exploratory study

Background and objectives

An increasing number of research studies point toward the importance and prevalence of long-term neurocognitive symptoms following infection with COVID-19. Our objectives were to capture the prevalence of cognitive impairments from 1 to 16 months post-COVID-19 infection, assess the changes in neuropsychological functions over time, and identify factors that can predict long-term deficits in cognition.

Methodology

A cross-sectional research design was adopted to compare four sub-samples recruited over a 16-month timeframe (1-4, 5-8, 9-12, and 13-16 months). Phone interviews were conducted at least 6 weeks after being infected by COVID-19. Sociodemographic and clinical questionnaires were administered followed by standardized neurocognitive and psychological tests and health questionnaires screening cognitive symptoms, anxiety, depression, fatigue, and autonomy.

Results

Regarding general health questionnaires, 55.2% of the 134 participants had symptoms of psychiatric illness, while 21.6% of patients had moderate-to-severe anxiety or depression. Cognitive efficiency was diminished in 19.4% of our population. Executive dysfunction was screened in 56% of patients, and an impairment of cognitive flexibility and inhibition was revealed in 38.8%. Depression, hospital or intensive care unit (ICU) admission, and the duration of hospital or ICU stay were associated with an inhibition deficit. The duration elapsed from the initial infection, and the neurocognitive assessment was not associated with a decrease in inhibition deficit. The prevalence of cognitive impairments, other than inhibition deficit, tended to decrease during the study period.

Discussion

This study supports the extensive literature on the cognitive and neuropsychiatric sequelae of COVID-19 and highlights long-lasting inhibition deficits, while other cognitive functions seemed to improve over time. The severity of infection could interact as a catalyst in the complex interplay between depression and executive functions. The absence of a relation between inhibition deficits and sociodemographic or medical factors reinforces the need for cognitive screening in all COVID-19 patients. Future research should focus on inhibition deficits longitudinally to assess the progression of this impairment.

Identifying harm reduction strategies for alcohol and drug-use in inpatient care settings and emergency departments: a scoping review protocol

INTRODUCTION

People who use alcohol and/or drugs (PWUAD) are at high risk of medical complications, frequent hospitalisation and drug-related death following discharge from inpatient settings and emergency departments (EDs). Harm reduction strategies implemented in these settings may mitigate negative health outcomes for PWUAD. However, the scope of harm reduction strategies used globally within inpatient settings and EDs is unknown. The objective of this review is to identify and synthesise reported harm reduction strategies that have been implemented across inpatient settings and EDs for PWUAD.

METHODS AND ANALYSIS

This review will include studies from any country and health service reporting on harm reduction strategies implemented in inpatient settings or EDs. The population of interest includes people of any race, gender and age identifying as PWUAD, or individuals who provided care to PWUAD. Studies which describe implementation strategies and barriers and enablers to implementation will be included. Studies published in English, or those available for English translation will be included. The following databases will be searched: MEDLINE All (Ovid), Embase (Elsevier Embase.com), CINAHL with Full Text (EBSCOhost), PsycINFO (EBSCOhost) and SCOPUS (Elsevier Scopus.com). A grey literature search will be conducted. There will be no date restrictions on the search. Titles, abstracts and full texts will be screened in duplicate. Data will be extracted using a standardised form. The results will be reported using the Preferred Reporting Items for Systematic Reviews and Meta-analyses extension for scoping reviews.

ETHICS AND DISSEMINATION

Scoping reviews do not require ethical approval. Patient partners with lived experience and relevant knowledge users will be engaged as research team members throughout all phases of the research process. A report detailing context, methodology and findings from this review will be disseminated to knowledge users and relevant community stakeholders. This review will be submitted for publication to a relevant peer-reviewed journal.

The Associations Between Clinical, Social, Financial Factors and Unmet Needs of Autistic Adults: Results from an Observational Study

Background

Autism is a developmental disability that affects how individuals experience the world. Each Autistic individual experiences Autism in their own way, meaning that the level and type of assistance in their everyday lives vary widely. A shortage of programs and services tailored to Autistic adults exists worldwide, and the current gap between needs and services is likely to worsen as the growing number of Autistic children being diagnosed reach adulthood. This research sought to determine priorities in terms of health and social service needs of Autistic adults and to examine factors influencing whether or not these services were being received.

Methods

Through a multistakeholder approach, researchers and Autistic adults codeveloped the Maritime Provinces Needs Assessment Survey and collected data from August 2017 to February 2018. The research team engaged Autistic adult partners, including one that was project colead, as full partners. We recruited survey respondents from three Maritime Provinces using mainly social media and local Autism networks. We used Poisson regression analyses to identify factors most strongly associated with the number of unmet needs reported by Autistic adults.

Results

In total, 260 respondents completed the needs assessment survey: 77 self-reporting Autistic adults (aged 19-55 years), 87 Autistic adults (aged 18-63 years) whose information was provided by a proxy respondent, and 96 professionals working in the field of Autism. Autistic adults reported a mean of 2.1 ± 1.5 (self-reported) and 2.8 ± 2.1 (proxy-reported) services wanted but not received. The number of mental health and neurodevelopmental conditions, unemployment, and perception that government support is insufficient were positively related to unmet needs.

Conclusions

Overall, the results of this study highlight considerable gaps among the support needs of Autistic adults. The identification of factors associated with a higher number of unmet needs helps identify potential subgroups requiring more attention.

Lay summary

Why was this study done?: There is currently a shortage of programs and services for Autistic adults. Little is known about which services are most important to Autistic adults and which factors are associated with not receiving them.What was the purpose of this study?: Our goals were (1) to determine the service need priorities of Autistic adults and (2) to examine factors associated with unmet needs.What did the researchers do?: The researchers invited health professionals, service providers, policy makers, Autism advocates, as well as Autistic adults and caregivers of Autistic adults to participate as part of the project team. In the early phases of the project, we named an Autistic adult colead of the project. In doing so, we acknowledged that conducting relevant research on the Autistic adult community implies not only hearing their voices and concerns, but also providing an opportunity for equal say on the research itself.We adapted previously used surveys to align them with our objectives of focusing only on Autistic adults. We launched the survey online and promoted it using various media and community channels, many of them direct suggestions from Autistic adult team members. We made paper copies available and provided a phone number for those who needed support filling out the survey.What were the results of the study?: More than 25% of Autistic adults identified 12 different services as priority needs.Autistic adults who (1) reported more mental health and neurodevelopmental conditions, (2) perceived their mental health as poor, or (3) felt that government support was insufficient were at greater risk of having unmet needs.What do these findings add to what was already known?: Similar to previous studies, we found that the service needs of Autistic adults are varied, and that many are not receiving the services they consider a priority. Our study also went one step further by identifying factors that are associated with a higher number of unmet needs.What are potential weaknesses in the study?: Our sample does not necessarily reflect the Autistic adult community as a whole, since we were unable to guarantee that hard-to-reach segments had access to our survey. In addition, we are unable to know how our results may change over time, as our survey was filled out on one occasion only. Finally, we did not measure Autistic traits and therefore are unable to estimate how different types of traits are associated with certain needs.How will these findings help autistic adults now or in the future?: Our results may help bring attention to subgroups of Autistic adults who need more help receiving the services they require.

Strategies for Research, Practice, and Policy for Autism in Later Life: A Report from a Think Tank on Aging and Autism

Over the past decade, there has been a growing interest in adults on the autistic spectrum, and more recently, the challenges related to aging in this population. A two-day Think Tank meeting, focused on aging in autism, was convened amongst international leaders in the field of autism research and practice. This meeting included a series of presentations addressing the current status of aging research, followed by discussions regarding priorities going forward. Attendees shared their thoughts and concerns regarding community services, government policies, societal perspectives and physical and mental health. The goal of these discussions was to consider systematic approaches aimed at providing meaningful supports that can ensure a quality of life for seniors on the autism spectrum.

"We are the stakeholders with the most at stake": scientific and autism community co-researchers reflect on their collaborative experience in the CONNECT project

BACKGROUND

Little research describes the everyday challenges and needs of autistic adults. In order to fill this data gap, the CONtiNuity of carE and support for autistiC adulTs (CONNECT) project set out to learn about the health and well-being of autistic adults as well as their service and support needs. To do so, CONNECT welcomed autistic adults and caregivers of autistic adults as members of the research team, alongside researchers, policy-makers, service providers and health professionals. Autistic adults were involved in every stage of the research project and participated in team meetings held several times a year as well as in numerous email exchanges.

METHODS

Two feedback questionnaires were designed for this study: one for the scientific co-researchers and one for the autism community co-researchers (the project's "patient partners"). Although the surveys varied from one another, they probed respondents to provide critical and constructive comments on issues that were central to their engagement in CONNECT. Four scientific co-researchers and four autism community co-researchers filled out the questionnaires. A comparative analysis was carried out on the responses provided to the open- and closed-ended survey questions as well as on complimentary data collected from the team's documents.

RESULTS

CONNECT was seen as a positive experience for both groups. Highlights included: helping tailor and design research and its relevant materials to better suit the needs of the autistic community; establishing relationships and creating long-lasting friendships with other autistic adults; gaining a better understanding of the research process; and forging new connections with regional, national and international stakeholders. Areas for improvement include: establishing clear roles, responsibilities and expectations from the start; outlining a strategy to address unforeseen changes in project leadership; and creating a platform allowing for the involvement and participation of a more representative sample of adults on the autism spectrum.

CONCLUSIONS

While not without its challenges, CONNECT demonstrates that a collaborative multi-stakeholder approach engaging autistic adults can be an effective model for conducting research on adult autism. Autistic adults and their caregivers can make the research process more open and accessible and make its outputs more relevant, useful and meaningful to the wider autistic adult community.

Incidence and risk factors for anastomotic bleeding in lower gastrointestinal surgery

Objective

Although major anastomotic bleeding after lower gastrointestinal surgery is considered rare, it can be life-threatening if not properly managed. The objective of this study was to assess the incidence of postoperative lower gastrointestinal intraluminal bleeding and to identify its potential risk factors. This retrospective cohort study used data from charts of 314 patients who underwent digestive surgery of the colon or small intestine. Details are reported for their sociodemographic data, surgical approach, comorbidities, timing and presentation of intraluminal bleeding events, bleeding diagnosis, treatment strategies, hospital length of stay, and clinical complications.

Results

A total of 7 patients (2.3%) experienced intraluminal bleeding in the postoperative period. The average length of hospital stay before discharge was 12 days (median = 13 days). Patients with intraluminal bleeding had a significantly higher percentage of coronary artery diseases compared to patients without intraluminal bleeding (P value = .04), as well as having a cancer diagnosis (P value = .02). The clinical complications that were more likely in patients with intraluminal bleeding included requiring blood transfusions (P value = .01), reduction in hemoglobin (P value = .001), cardiac ischemia (P value = .02), and atrial fibrillations (P value = .02).

Electronic supplementary material

The online version of this article (10.1186/s13104-019-4403-0) contains supplementary material, which is available to authorized users.

Effects of the combination of metformin and exercise on glycated hemoglobin, functional capacity, lipid profile, quality of life, and body weight

Objective

To evaluate the impact of the combination of metformin and exercise on changes in glycated hemoglobin (HbA_1c), functional capacity, the lipid profile, quality of life, and weight.

Methods

Data from a 12-week cardiovascular rehabilitation program (2014–2016) were retrospectively evaluated. Metformin exposure was determined through recorded prescriptions, and average minutes of exercise per week were computed from exercise logs. The primary outcomes were changes in HbA_1c and functional capacity (6-minute walk test [6MWT]) over 12 weeks. The secondary outcomes were changes in the lipid profile, quality of life, and weight. Directed acyclic graphs were used to identify potential confounders, accounted for with multiple linear regression.

Results

The cohort comprised 403 patients (85 metformin users, 318 non-users). The average amount of exercise was 102.7±48.7 minutes/week among metformin users and 107.7±58.1 minutes/week among non-users. Although changes in HbA_1c were similar for both groups, the coefficient for the metformin–exercise interaction indicated significantly greater improvements in the 6MWT among metformin users. There were no between-group differences in any secondary outcomes.

Conclusions

The combination of metformin and exercise led to greater gains in functional capacity than exercise alone. This combination did not appear to influence the effects of either treatment on other outcomes.

Approaches to considering sex and gender in continuous professional development for health and social care professionals: An emerging paradigm

Consideration of sex and gender in research and clinical practice is necessary to redress health inequities and reduce knowledge gaps. As all health professionals must maintain and update their skills throughout their career, developing innovative continuing professional education programs that integrate sex and gender issues holds great promise for reducing these gaps. This article proposes new approaches to partnership, team development, pedagogical theory, content development, evaluation and data management that will advance the integration of sex and gender in continuing professional development (CPD). Our perspectives build on an intersectoral and interprofessional research team that includes several perspectives, including those of CPD, health systems, knowledge translation and sex and gender.

Challenges and Facilitating Factors in Accessing Administrative Data for Research: Insights from the Children's Health Profile and Trajectory Initiative in NB and PEI

IntroductionAdministrative health data (AHD) are typically not analyzed to produce evidence on the effectiveness and limitations of primary prevention programs and strategies. The value of AHD for answering research questions is generally recognized, but the challenges in accessing and using these data for research are not always know and documented. Objectives and ApproachTo identify and advise on the facilitating factors and challenges of accessing select AHD in New Brunswick (NB) and Prince Edward Island (PEI) for the purpose of creating an intra-provincial Child Health Profile (CHP) and population-based birth cohort database, using existing AHD not been previously linked. This research is a cross-jurisdictional collaboration between NB and PEI with an integrated knowledge translation (iKT) approach that adheres to each province’s unique data policies, data procedures, and data governance. The collaboration involves people in various roles: provincial government managers, policy-makers, data custodians, health practitioners, citizens, community organizations, in addition to academic researchers. ResultsAccess to select AHD required considerable preparation, cross province coordination, and ongoing discussions over many months. Key facilitators were the NB Institute for Research, Data and Training, a newly established data repository that holds provincial AHD in NB, and the provincial health authority in PEI. In NB, the existence of well-documented protocols and support from designated personnel (including trained data analysts) were assets facilitating data access through the data repository. In PEI, REB approval was obtained more rapidly but challenges occurred in subsequent stages of data access directly through the health authority. This research supports the empowerment of stakeholders such as Public Health and researchers who are trying to leverage ‘big data’ resources to address research and practice questions regarding children’s health. Conclusion/ImplicationsAccessing AHD for the project was facilitated by the existence of well-documented protocols and other specialized resources that help streamline the process of data sharing while ensuring data privacy and security. Continued relationship-building among stakeholders is needed to facilitate and maximize the use of existing AHD in NB and PEI.

Rheb regulates mitophagy induced by mitochondrial energetic status

Mitophagy has been recently described as a mechanism of elimination of damaged organelles. Although the regulation of the amount of mitochondria is a core issue concerning cellular energy homeostasis, the relationship between mitochondrial degradation and energetic activity has not yet been considered. Here, we report that the stimulation of mitochondrial oxidative phosphorylation enhances mitochondrial renewal by increasing its degradation rate. Upon high oxidative phosphorylation activity, we found that the small GTPase Rheb is recruited to the mitochondrial outer membrane. This mitochondrial localization of Rheb promotes mitophagy through a physical interaction with the mitochondrial autophagic receptor Nix and the autophagosomal protein LC3-II. Thus, Rheb-dependent mitophagy contributes to the maintenance of optimal mitochondrial energy production. Our data suggest that mitochondrial degradation contributes to a bulk renewal of the organelle in order to prevent mitochondrial aging and to maintain the efficiency of oxidative phosphorylation.

Mitoplasticity: adaptation biology of the mitochondrion to the cellular redox state in physiology and carcinogenesis

Adaptation and transformation biology of the mitochondrion to redox status is an emerging domain of physiology and pathophysiology. Mitochondrial adaptations occur in response to accidental changes in cellular energy demand or supply while mitochondrial transformations are a part of greater program of cell metamorphosis. The possible role of mitochondrial adaptations and transformations in pathogenesis remains unexplored, and it has become critical to decipher the stimuli and the underlying molecular pathways. Immediate activation of mitochondrial function was described during acute exercise, respiratory chain injury, Endoplasmic Reticulum stress, genotoxic stress, or environmental toxic insults. Delayed adaptations of mitochondrial form, composition, and functions were evidenced for persistent changes in redox status as observed in endurance training, in fibroblasts grown in presence of respiratory chain inhibitors or in absence of glucose, in the smooth muscle of patients with severe asthma, or in the skeletal muscle of patients with a mitochondrial disease. Besides, mitochondrial transformations were observed in the course of human cell differentiation, during immune response activation, or in cells undergoing carcinogenesis. Little is known on the signals and downstream pathways that govern mitochondrial adaptations and transformations. Few adaptative loops, including redox sensors, kinases, and transcription factors were deciphered, but their implication in physiology and pathology remains elusive. Mitoplasticity could play a protective role against aging, diabetes, cancer, or neurodegenerative diseases. Research on adaptation and transformation could allow the design of innovative therapies, notably in cancer.

Rationale for mitochondria-targeting strategies in cancer bioenergetic therapies

In the 1920s, Otto Warburg first hypothesized that mitochondrial impairment is a leading cause of cancer although he recognized the existence of oxidative tumors. Likewise, Weinhouse and others in the 50s found that deficient mitochondrial respiration is not an obligatory feature of cancer and Peter Vaupel suggested in the 1990s that tumor oxygenation rather than OXPHOS capacity was the limiting factor of mitochondrial energy production in cancer. Recent studies now clearly indicate that mitochondria are highly functional in mice tumors and the field of oncobioenergetic identified MYC, Oct1 and RAS as pro-OXPHOS oncogenes. In addition, cancer cells adaptation to aglycemia, metabolic symbiosis between hypoxic and non-hypoxic tumor regions as well the reverse Warburg hypothesis support the crucial role of mitochondria in the survival of a subclass of tumors. Therefore, mitochondria are now considered as potential targets for anti-cancer therapy and tentative strategies including a bioenergetic profile characterization of the tumor and the subsequent adapted bioenergetic modulation could be considered for cancer killing. This article is part of a Directed Issue entitled: Bioenergetic dysfunction, adaptation and therapy.

Preservation of NADH ubiquinone-oxidoreductase activity by Src kinase-mediated phosphorylation of NDUFB10

The tyrosine kinase Src is upregulated in several cancer cells. In such cells, there is a metabolic reprogramming elevating aerobic glycolysis that seems partly dependent on Src activation. Src kinase was recently shown to be targeted to mitochondria where it modulates mitochondrial bioenergetics in non-proliferative tissues and cells. The main goal of our study was to determine if increased Src kinase activity could also influence mitochondrial metabolism in cancer cells (143B and DU145 cells). We have shown that 143B and DU145 cells produce most of the ATP through glycolysis but also that the inhibition of OXPHOS led to a significant decrease in proliferation which was not due to a decrease in the total ATP levels. These results indicate that a more important role for mitochondria in cancer cells could be ensuring mitochondrial functions other than ATP production. This study is the first to show a putative influence of intramitochondrial Src kinase on oxidative phosphorylation in cancer cells. Indeed, we have shown that Src kinase inhibition led to a decrease in mitochondrial respiration via a specific decrease in complex I activities (NADH-ubiquinone oxidoreductase). This decrease is associated with a lower phosphorylation of the complex I subunit NDUFB10. These results suggest that the preservation of complex I function by mitochondrial Src kinase could be important in the development of the overall phenotype of cancer.

AICAR inhibits cancer cell growth and triggers cell-type distinct effects on OXPHOS biogenesis, oxidative stress and Akt activation

The AMP-activated protein kinase agonist AICAR mimics a low intracellular energy state and inhibits the proliferation of cancer cells by different mechanisms, which may depend on the bioenergetic signature of these cells. AICAR can also stimulate mitochondrial biogenesis in myoblasts, neurons and HeLa cells. Yet, whether the reactivation of oxidative phosphorylation biogenesis by AICAR contributes to the growth arrest of cancer cells remains undetermined. To investigate this possibility, we looked at the impact of 24- and 48-hour treatments with 750 μM AICAR on human cancer cell lines (HeLa, DU145, and HEPG2), non-cancer cells (EM64, FM14, and HLF), embryonic cells (MRC5) and Rho(0) cells. We determined the bioenergetic profile of these cells and assessed the effect of AICAR on oxidative phosphorylation biogeneis, cell viability and cell proliferation, ROS generation, mitochondrial membrane potential and apoptosis induction. We also followed possible changes in metabolic regulators such as Akt and Hif1-α stabilization which might participate to the anti-proliferative effect of AICAR. Our results demonstrated a strong and cancer-specific anti-growth effect of AICAR that may be explained by three different modes according to cell type: the first mode included stimulation of the mitochondrial apoptotic pathway however with compensatory activation of Akt and upregulation of oxidative phosphorylation. In the second mode of action of AICAR Akt phosphorylation was reduced. In the third mode of action, apoptosis was activated by different pathways. The sensitivity to AICAR was higher in cells with a low steady-state ATP content and a high proliferation rate.

Antiproliferative activity of levobupivacaine and aminoimidazole carboxamide ribonucleotide on human cancer cells of variable bioenergetic profile

We assessed the impact of ten mitoactive drugs on the viability and the proliferation of human cancer cells of variable origin and bioenergetics. A validated chemotherapeutic drug, doxorubicin, was used as a gold-standard for comparison. We also looked at the effect of these drugs on Rho(0) cells and on embryonic fibroblasts, both of which rely mainly on glycolysis to generate the vital ATP. The statistical analysis of the area under the curves revealed a cell-type specific response to mitodopant and mitotoxic compounds, in correlation with the contribution of glycolysis to cellular ATP synthesis. These findings indicate that the bioenergetic state of the cell determines in part the impact of mitodopants and mitotoxics on cancer cells viability.