Poly(dimethylsiloxane) as a room-temperature solid solvent for photophysics and photochemistry.

Medium viscosity strongly affects the dynamics of solvated species and can drastically alter the deactivation pathways of their excited states. This study demonstrates the utility of poly(dimethylsiloxane) (PDMS) as a room-temperature solid-state medium for optical spectroscopy. As a thermoset elastic polymer, PDMS is transparent in the near ultraviolet, visible, and near infrared spectral regions. It is easy to mould into any shape, forming surfaces with a pronounced smoothness. While PDMS is broadly used for the fabrication of microfluidic devices, it swells in organic solvents, presenting severe limitations for the utility of such devices for applications employing non-aqueous fluids. Nevertheless, this swelling is reversible, which proves immensely beneficial for loading samples into the PDMS solid matrix. Transferring molecular-rotor dyes (used for staining prokaryotic cells and amyloid proteins) from non-viscous solvents into PDMS induces orders-of-magnitude enhancement of their fluorescence quantum yield and excited-state lifetimes, providing mechanistic insights about their deactivation pathways. These findings demonstrate the unexplored potential of PDMS as a solid solvent for optical applications.

Using photovoice to understand experiences of opioid use among sexual and gender minority youth in Vancouver, Canada.

In Canada, sexual and gender minority youth use opioids at disproportionately high rates. Yet, little is known about the distinct contexts of opioid use within this group, challenging capacity to develop well founded policy and practice supports. This case study aims to examine - in depth - the experiences and contexts of opioid use among a sample of four sexual and gender minority youth in Vancouver, Canada. Qualitative data from photovoice methods and in-depth, semi-structured interviews were collected in 2019. Analysis adopted a reflexive thematic approach from a critical interpretive standpoint, informed by minority stress theory. Three interconnected themes were constructed: (i) minoritised contexts of entry into and continuation of opioid use; (ii) mental health-maintaining and stress-mitigating effects of opioid use in the context of minoritisation; and (iii) intersections of stigma, violence and poverty with opioid use and minoritisation. Findings suggest that the health of sexual and gender minority youth who use opioids is shaped by minority stress and overlapping forms of structural marginalisation. They signal the need for responsive strategies that hold promise in supporting this population, including advancing integrated approaches to substance use and mental health care alongside interventions targeted towards the social and structural determinants of health.

HuR counteracts miR-330 to promote STAT3 translation during inflammation-induced muscle wasting.

Debilitating cancer-induced muscle wasting, a syndrome known as cachexia, is lethal. Here we report a posttranscriptional pathway involving the RNA-binding protein HuR as a key player in the onset of this syndrome. Under these conditions, HuR switches its function from a promoter of muscle fiber formation to become an inducer of muscle loss. HuR binds to the STAT3 (signal transducer and activator of transcription 3) mRNA, which encodes one of the main effectors of this condition, promoting its expression both in vitro and in vivo. While HuR does not affect the stability and the cellular movement of this transcript, HuR promotes the translation of the STAT3 mRNA by preventing miR-330 (microRNA 330)-mediated translation inhibition. To achieve this effect, HuR directly binds to a U-rich element in the STAT3 mRNA-3'untranslated region (UTR) located within the vicinity of the miR-330 seed element. Even though the binding sites of HuR and miR-330 do not overlap, the recruitment of either one of them to the STAT3-3'UTR negatively impacts the binding and the function of the other factor. Therefore, together, our data establish the competitive interplay between HuR and miR-330 as a mechanism via which muscle fibers modulate, in part, STAT3 expression to determine their fate in response to promoters of muscle wasting.

"Maybe if I stop the drugs, then maybe they'd care?"-hospital care experiences of people who use drugs.

BACKGROUND: Drug use is associated with increased morbidity and mortality but people who use drugs experience significant barriers to care. Data are needed about the care experiences of people who use drugs to inform interventions and quality improvement initiatives. The objective of this study is to describe and characterize the experience of acute care for people who use drugs. METHODS: We conducted a qualitative descriptive study. We recruited people with a history of active drug use at the time of an admission to an acute care hospital, who were living with HIV or hepatitis C, in Toronto and Ottawa, Canada. Data were collected in 2014 and 2015 through semi-structured interviews, audio-recorded and transcribed, and analyzed thematically. RESULTS: Twenty-four adults (18 men, 6 women) participated. Participants predominantly recounted experiences of stigma and challenges accessing care. We present the identified themes in two overarching domains of interest: perceived effect of drug use on hospital care and impact of care experiences on future healthcare interactions. Participants described significant barriers to pain management, often resulting in inconsistent and inadequate pain management. They described various strategies to navigate access and receipt of healthcare from being "an easy patient" to self-advocacy. Negative experiences influenced their willingness to seek care, often resulting in delayed care seeking and targeting of certain hospitals. CONCLUSION: Drug use was experienced as a barrier at all stages of hospital care. Interventions to decrease stigma and improve our consistency and approach to pain management are necessary to improve the quality of care and care experiences of those who use drugs.

Sexual behaviors among women living with HIV in Ontario, Canada.

Understanding the sexual activities and partnerships of women living with human immunodeficiency virus (HIV) remains important to promote healthy sexuality and to reduce the transmission of HIV and other sexually transmitted infections. We described sexual behaviors of women living with HIV enrolled in an ongoing study in Ontario, Canada. Data were available from 582 women who self-completed a sexual behavior questionnaire between 2010 and 2012. Nearly half (46.1%) of women reported a sexual partner in the preceding three months; women less likely to be sexually active were older, Black/African, separated, divorced, widowed, single, and unemployed. Most sexually active women had one partner (76.4%), a regular partner (75.9%), male (96.2%) partner(s), and partners who were HIV-negative or unknown HIV status (75.2%). Women were more likely to use a condom with HIV-negative/status unknown partners (81.3%) than with HIV-positive partners (58.6%; p = .008). Only 8.0% of sexually active women reported condomless sex with a discordant HIV-negative/status unknown partner when their viral load was detectable. Overall, most women living with HIV were sexually inactive or engaged in sexual activities that were low risk for HIV transmission.

Adapting preparedness outreach to a virtual world.

Over the last two years, agencies have experimented with new systems and tactics to reach as many people as possible with critical preparedness information. This paper describes how COVID-19 forced FEMA Region 10 to adapt its public education and outreach strategy to a fully online space in order to keep the public informed about potential disasters. The paper discusses how the Individual and Community Preparedness team at FEMA Region 10 reaches thousands of people around the world by hosting regular webinars, live events, workshops and training sessions, and publishing a monthly newsletter. The paper also argues that if preparedness and response organisations are to evolve their outreach strategies and messaging plans and extend the reach of their messages, they must continue to adapt and to meet their target audience where they are.

Relationships between personality traits, high school sports participation, and physical activity of college students in the United States.

Objective: The study aimed to 1) examine relationships between contexts of PA, personality traits, and high school sports participation (sports) and 2) determine significant PA correlates in a college population. Participants: 237 undergraduates at a university in the United States between September 2020 and May 2021 participated. Methods: Participants completed a survey evaluating PA, personality traits, sports, and demographic variables. Pearson partial correlations assessed correlations between different PA domains, personality traits, and sports. Conscientiousness was positively associated with all PA measures (r = .14-.30), except for active transport PA. Sports were related to vigorous and leisure PA. Conscientiousness is related to PA measures and is a significant PA correlate. However, more research is necessary to understand if leisure time PA can enhance Conscientiousness.

Utilizing procalcitonin in a clinical setting to help differentiate between aspiration pneumonia and aspiration pneumonitis.

OBJECTIVE: Aspiration can lead to complications such as aspiration pneumonia (ASPNA) or aspiration pneumonitis. Use of procalcitonin (PCT) assays has been supported to help differentiate between bacterial and nonbacterial etiologies for infection. We hypothesize PCT levels will differ significantly in patients with ASPNA versus aspiration pneumonitis. METHODS: This study retrospectively analyzed patients with an ICD-10 diagnosis of ASPNA or aspiration pneumonitis from September 2017 to September 2019. 228 patients met criteria and were divided into two cohorts: aspiration pneumonitis (45 patients) or ASPNA (183 patients). Initial and 48-hour PCTs were assessed. RESULTS: The aspiration pneumonitis cohort had a higher percentage of patients with normal initial PCT levels than the ASPNA cohort (86.7% vs 38.8%; P < 0.0001). CONCLUSION: This study suggests PCT could be a useful tool to help differentiate between ASPNA and aspiration pneumonitis. We postulate utilizing PCT levels alongside current diagnostic criteria would allow for more appropriate treatment and improved antibiotic stewardship.

COVID-19 Monoclonal Antibody Administration Linked to Drop in Blood Pressure: A Retrospective Cohort Study.

This study reports on hemodynamic changes observed during monoclonal antibody (mAb) administration for patients with severe acute respiratory distress syndrome-coronavirus-2. Findings from this study may have implications for patient safety. Hemodynamic data from 705 patients who received subcutaneous or intravenous mAb therapy during February 1, 2021-September 30, 2021 in clinics in Arkansas, USA were reviewed. Descriptive statistics and paired t-tests were used to assess blood pressure before and after treatment. Results showed 386 (54.7%) patients experienced a drop in systolic blood pressure (SBP) or diastolic blood pressure (DBP) >5 mmHg. The average drop in SBP was 9.2 mmHg for those patients. Two hundred and eighty-one (39.9%) patients experienced a drop in SBP of >10 mmHg with an average drop in SBP of 12.0 mmHg. The Emergency Use Authorization for mAb does not list hypotension as a contraindication for treatment. Our findings suggest mAb therapy should be administered in an environment where vitals are monitored.

SNP chromosome microarray genotyping for detection of uniparental disomy in the clinical diagnostic laboratory.

Single nucleotide polymorphism (SNP) chromosome microarray is well established for investigation of children with intellectual deficit/development delay and prenatal diagnosis of fetal malformation but has also emerged for uniparental disomy (UPD) genotyping. Despite published guidelines on clinical indications for testing there are no laboratory guidelines published for performing SNP microarray UPD genotyping. We evaluated SNP microarray UPD genotyping using Illumina beadchips on family trios/duos within a clinical cohort (n=98) and then explored our findings in a post-study audit (n=123). UPD occurred in 18.6% and 19.5% cases, respectively, with chromosome 15 most frequent (62.5% and 25.0%). UPD was predominantly maternal in origin (87.5% and 79.2%), highest in suspected genomic imprinting disorder cases (56.3% and 41.7%) but absent amongst children of translocation carriers. We assessed regions of homozygosity among UPD cases. The smallest interstitial and terminal regions were 2.5 Mb and 9.3 Mb, respectively. We found regions of homozygosity confounded genotyping in a consanguineous case with UPD15 and another with segmental UPD due to non-informative probes. In a unique case with chromosome 15q UPD mosaicism, we established the detection limit of mosaicism as ∼5%. From the benefits and pitfalls identified in this study, we propose a testing model and recommendations for UPD genotyping by SNP microarray.

An interesting case of COVID-19 with transient ischemic attack as a delayed neurological complication.

COVID-19, the ongoing pandemic is known to affect almost every organ system, however the incidence of TIA is not as well established. So, here, we report a rare case of COVID-19 with transient ischemic attack (TIA) as a delayed complication.

Noninferiority of Subcutaneous Versus Intravenous Casirivimab/Imdevimab for Outpatient Treatment of SARS-CoV-2 in a Real-World Setting.

Monoclonal antibody (mAb) therapy has emerged as one of the mainstay treatment options for SARS-CoV-2. To improve speed of delivery and decrease bedside nursing needs, subcutaneous (SC) delivery of mAbs has been explored as an alternative to standard intravenous (IV) administration. To date, data regarding the effectiveness of SC compared with IV mAb are lacking. This retrospective cohort analysis conducted between April 2021 and August 2021 compared hospitalization rates among patients receiving IV versus SC administration of casirivimab/imdevimab (Regen-COV) at a single institution in Arkansas. Casirivimab/imdevimab was a promising mAb therapy utilized during the height of the Delta variant surge of the SARS-CoV-2 pandemic. Before resistance developed by the Omicron variant, casirivimab/imdevimab was utilized for outpatient treatment of SARS-CoV-2 patients at risk of deterioration. Primary outcomes of this investigation were the 30-day post-treatment rate of hospitalization and intensive care unit (ICU) care during hospitalization. There was no increased risk of hospitalization or ICU care with SC administration compared with IV administration. As SARS-CoV-2 continues to mutate into variants such as Omicron and develop resistance to existing mAbs, these preliminary findings of noninferiority of SC versus IV warrant ongoing investigation into SC administration of other mAbs.

Regional COVID-19 Dynamics: Surrogate Synchrony in Case Infection Rates.

As many jurisdictions consider in-person learning strategies (including at Institutions of Higher Education, IHE), implementing travel restrictions or quarantines, and/or establishing interstate pacts to reduce COVID-19 spread, this study explores the degree to which COVID-19 case infection rates in a group of neighboring, Southern and Midwestern U.S. states (namely, Arkansas and its contiguous neighbors) are patterned in a non-random way known as synchrony. Utilizing surrogate synchrony (SUSY) to estimate the dyadic coupling between the COVID-19 case infection rate processes in this region from March to December 2020, results indicate that significant synchrony is present between Arkansas and three of its neighbors. The highest level of instantaneous synchrony occurs between Arkansas and Tennessee, with the next highest level occurring between Arkansas and Missouri. There is evidence of directionality in the synchrony, indicating that Arkansas case infection rates lead Mississippi while rates in Missouri and Tennessee lead Arkansas. The lagged cross-correlations suggest the greatest synchrony to occur between 3 and 6 days. To explore the effect of IHE reopening on COVID-19, synchrony is compared between pre- and post-reopening windows. Results suggested that, following reopening, there are gains in detectable synchrony and that COVID-19 is in-flowing to Arkansas from all of its neighboring states. Taken together, results suggest that there is spatiality to COVID-19 with neighboring states having case infection rates that are significantly synchronous at a lag time that would be expected based on symptom onset. This synchrony is potentially strengthened by the in-flow and cross-border movement of IHE students.

An Exploration of Stress: Leveraging Online Data from Crowdsourcing Platforms.

Background: Early detection of community health risk factors such as stress is of great interest to health policymakers, but representative data collection is often expensive and time-consuming. It is important to investigate the use of alternative means of data collection such as crowdsourcing platforms. Methods: An online sample of Amazon Mechanical Turk (MTurk) workers (N = 500) filled out, for themselves and their child, demographic information and the 10-item Perceived Stress Scale (PSS-10), designed to measure the degree to which situations in one's life are appraised as stressful. Internal consistency reliability of the PSS-10 was examined via Cronbach's alpha. Analysis of variance (ANOVA) was utilized to explore trends in the average perceived stress of both adults and their children. Last, Rasch trees were utilized to detect differential item functioning (DIF) in the set of PSS-10 items. Results: The PSS-10 showed adequate internal consistency reliability (Cronbach's alpha = 0.73). ANOVA results suggested that stress scores significantly differed by education (p = 0.024), employment status (p = 0.0004), and social media usage (p = 0.015). Rasch trees, a recursive partitioning technique based on the Rasch model, indicated that items on the PSS-10 displayed DIF attributable to physical health for adults and social media usage for children. Conclusion: The key conclusion is that this data collection scheme shows promise, allowing public health officials to examine health risk factors such as perceived stress quickly and cost effectively.

Involuntary stabilization care of youth who overdose: a call for evidence- and ethics-informed substance use policy.

As is the case across Canada, the province of British Columbia is in the midst of an opioid overdose crisis. In response to the devastating impacts of this crisis on youth (under 19 years of age), the provincial government is considering amending the Mental Health Act to allow for involuntary, hospital-based stabilization care of youth following an overdose. This policy change represents one concrete action that the provincial government is exploring in response to public advocacy for enhanced supports for youth who overdose. At this juncture, however, we are concerned that stabilization care requires further interrogation in the context of key, interrelated public health and ethical dimensions pertaining to this legislation. In this commentary, we describe three key areas for public health deliberation: (1) the evidence underpinning stabilization care, (2) ethical considerations, and (3) the potential for unintended and unevenly distributed consequences. We then offer ways forward to guide and provide opportunities for a more equitable public health response to the overdose crisis and its impacts on youth. In doing so, we emphasize the need for meaningful engagement of youth as key stakeholders in the development of evidence- and ethics-informed substance use care and policy interventions.

RéSUMé: Comme le reste du Canada, la province de la Colombie-Britannique est en pleine crise de surdoses d'opioïdes. En réponse aux effets dévastateurs de cette crise sur les jeunes (moins de 19 ans), le gouvernement provincial songe à modifier la loi sur la santé mentale de la province pour permettre les soins de stabilisation forcés des jeunes à l'hôpital après une surdose. Ce changement d'orientation représente une mesure concrète envisagée en réaction aux campagnes de sensibilisation qui préconisent des mesures de soutien améliorées aux jeunes qui font des surdoses. À ce stade toutefois, nous pensons que les soins de stabilisation nécessitent une interrogation plus poussée sur les aspects sanitaires et éthiques essentiels et interdépendants afférents à cette loi. Dans notre commentaire, nous décrivons trois aspects clés des délibérations de la santé publique : 1) les données probantes qui sous-tendent les soins de stabilisation, 2) les considérations éthiques et 3) les effets pervers et inégalement répartis qui pourraient en découler. Nous proposons ensuite une marche à suivre pour guider et créer les possibilités d'une riposte plus équitable de la santé publique à la crise des surdoses et à ses répercussions sur les jeunes. Ce faisant, nous insistons sur la nécessité de faire participer concrètement les jeunes, en tant qu'acteurs privilégiés, à l'élaboration d'interventions de soins et de politiques sur la consommation de substances éclairées par les données probantes et par l'éthique.

Illicit drug use while admitted to hospital: Patient and health care provider perspectives.

BACKGROUND: Across North America, the opioid overdose epidemic is leading to increasing hospitalizations of people who use drugs (PWUD). However, hospitals are ill-prepared to meet the needs of PWUD. We focus on illicit drug use while admitted to hospital and how PWUD and health care providers describe, respond, and attempt to manage its use. METHODS AND FINDINGS: Using varied purposive methods in Toronto and Ottawa, we recruited n = 24 PWUD (who self-reported that they were living with HIV and/or HCV infection; currently or had previously used drugs or alcohol in ways that were harmful; had a hospital admission in the past five years) and n = 26 health care providers (who were: currently working in an academic hospital as a physician, nurse, social worker or other allied health professional; and 2) providing care to this patient group). All n = 50 participants completed a short, socio-demographic questionnaire and an audio-recorded semi-structured interview about receiving or providing acute care in a hospital between 04/2014 and 05/2015. Patient participants received $25 CAD and return transit fare; provider participants received a $50 CAD gift card for a bookseller. All participants provided informed consent. Audio-recordings were transcribed verbatim, corrected, and uploaded to NVivo 10. Using the seven-step framework method, transcripts were coded line-by-line and managed using NVvivo. An analytic framework was created by grouping and mapping the codes. Preliminary analyses were presented to advisory group members for comment and used to refine the interpretation. Questionnaire data were managed using SPSS version 22.0 and descriptive statistics were used to describe the participants. Many but not all patient participants spoke about using psycho-active substances not prescribed to them during a hospital admission. Attempts to avoid negative experiences (e.g., withdrawal, boredom, sadness, loneliness and/or untreated pain) were cited as reasons for illicit drug use. Most tried to conceal their illicit drug use from health care providers. Patients described how their self-reported level of pain was not always believed, tolerance to opioids was ignored, and requests for higher doses of pain medications denied. Some health care providers were unaware of on-site illicit drug use; others acknowledged it occurred. Few could identify a hospital policy specific to illicit drug use and most used their personal beliefs to guide their responses to it (e.g., ignore it, increase surveillance of patients, reprimands, loss of privileges/medications, threats of immediate discharge should it continue, and substitution dosing of medication). CONCLUSIONS: Providers highlighted gaps in institutional guidance for how they ought to appropriately respond to in-hospital substance use. Patients attempted to conceal illicit drug use in environments with no institutional policies about such use, leading to varied responses that were inconsistent with the principles of patient centred care and reflected personal beliefs about illicit drug use. There are increasing calls for implementation of harm reduction approaches and interventions in hospitals but uptake has been slow. Our study contributes to this emerging body of literature and highlights areas for future research, the development of interventions, and changes to policy and practice.

Externalizing Behavior and Psychopathy: A Social Relations Analysis.

Most conceptualizations of psychopathy emphasize its interpersonal consequences, yet most research on psychopathy has been conducted at the individual level. In small groups, well-acquainted members of sororities and fraternities (N = 111) rated one another and themselves on a variety of externalizing behaviors (e.g., cheating, risky sex), and completed a self-report measure of psychopathy. There was consensus about the extent to which members of the groups engaged in these behaviors. The associations between these target effects and respondents' self-reports suggest that these consensual judgments were reasonably accurate. Individuals who reported higher levels of psychopathic personality traits were seen as more likely to engage in externalizing behaviors, with self-centered impulsivity most strongly associated with these behaviors. Although fearless dominance was unrelated to self-reported externalizing behaviors, it was related to peers' ratings of marijuana use, academic dishonesty, and future legal troubles, suggesting that individuals high in fearless dominance may underreport their problem behaviors.

Impact of Procalcitonin Levels Combined with Active Intervention on Antimicrobial Stewardship in a Community Hospital.

BACKGROUND: Procalcitonin (PCT) guidance alone or in conjunction with antibiotic stewardship programs (ASP) has been shown to reduce antibiotic utilization and duration of therapy without adversely affecting patient outcomes. METHODS: In a community hospital, we investigated the impact of PCT with ASP recommendations on length of stay (LOS), length of antimicrobial therapy (LOT) after ASP recommendation, and total LOT over a one-year period. Adult patients with at least one PCT value and concomitant ASP recommendations were included. Patients were grouped by provider ASP compliance and further stratified by normal versus elevated PCT values. No specific PCT algorithm was utilized. RESULTS: A total of 857 patients were retrospectively analyzed. Physicians complied with 73.7% of ASP recommendations. There were no significant differences in LOS based on ASP compliance. Mean LOT after ASP recommendations and mean total LOT were significantly shorter (2.5 vs. 3.9 days, p<0.0001 and 5.1 vs. 6.6 days, p<0.0001, respectively) in the ASP complier group. When stratified by initial PCT levels, ASP compliers for patients with normal PCT levels had the shortest duration of therapy for all groups; among patients with elevated PCT levels, the duration of therapy was significantly shorter in the ASP compliant group (5.79 vs. 7.12 days, p<0.0111). When controlling for baseline differences in initial PCT levels, LOS was found to be marginally shorter in the ASP compliant group (p = 0.076). CONCLUSIONS: PCT-guided ASP physician recommendations, when accepted by providers, led to reduction in antimicrobial LOT in a community hospital. This benefit was extended across patient groups irrespective of initial PCT levels.