Development and Application of a Multidimensional Database for the Detection of Quaternary Ammonium Compounds and Their Phase I Hepatic Metabolites in Humans.

The COVID-19 pandemic has led to significantly increased human exposure to the widely used disinfectants quaternary ammonium compounds (QACs). Xenobiotic metabolism serves a critical role in the clearance of environmental molecules, yet limited data are available on the routes of QAC metabolism or metabolite levels in humans. To address this gap and to advance QAC biomonitoring capabilities, we analyzed 19 commonly used QACs and their phase I metabolites by liquid chromatography-ion mobility-tandem mass spectrometry (LC-IM-MS/MS). In vitro generation of QAC metabolites by human liver microsomes produced a series of oxidized metabolites, with metabolism generally occurring on the alkyl chain group, as supported by MS/MS fragmentation. Discernible trends were observed in the gas-phase IM behavior of QAC metabolites, which, despite their increased mass, displayed smaller collision cross-section (CCS) values than those of their respective parent compounds. We then constructed a multidimensional reference SQLite database consisting of m/z, CCS, retention time (rt), and MS/MS spectra for 19 parent QACs and 81 QAC metabolites. Using this database, we confidently identified 13 parent QACs and 35 metabolites in de-identified human fecal samples. This is the first study to integrate in vitro metabolite biosynthesis with LC-IM-MS/MS for the simultaneous monitoring of parent QACs and their metabolites in humans.

Diet and Physical Activity for Cardiovascular Disease Prevention.

Cardiovascular disease (CVD) is the leading cause of death in the United States. One-third of these deaths may be preventable through healthy lifestyle choices including diet and physical activity. The Mediterranean diet is associated with reduced cardiovascular mortality, whereas the Dietary Approaches to Stop Hypertension (DASH) eating plan is associated with a reduced risk of coronary artery disease. Substituting dietary saturated fat with polyunsaturated fatty acids is associated with improved cardiovascular outcomes, although exogenous supplementation with omega-3 fatty acids does not improve cardiovascular outcomes. There is an association between increased sodium intake and cardiovascular risk, but reducing dietary sodium has not consistently shown a reduction in cardiovascular risk. Physical activity recommendations for adults are at least 150 minutes of moderate-intensity aerobic activity per week, 75 minutes of vigorous-intensity aerobic activity per week, or an equivalent combination. Increases in physical activity by any level are associated with reduced cardiovascular risk. Introducing muscle-strengthening activities at least twice per week in previously inactive adults is associated with improved cardiovascular outcomes. Inactive adults without known CVD can gradually increase activity to a moderate-intensity level without consulting a physician. The U.S. Preventive Services Task Force recommends behavioral counseling to promote healthy diet and physical activity in adults at high risk of CVD. Evidence of benefit for counseling patients at average risk is less established.

Experiences of Transgender Participants in Emergency Departments: Findings from the OutLook Study.

Purpose: Even in cases of medical emergency, mistreatment and negative experiences in life or in medical settings can deter trans patients from seeking necessary care. The purpose of this study was to identify factors associated with trans persons' emergency department (ED) avoidance in the mixed urban-rural Region of Waterloo, Ontario, Canada. Methods: The OutLook Study was a community-based partnership that created an online, cross-sectional questionnaire for lesbian, gay, bisexual, transgender, and other sexual and gender minority community members. Participants in this analysis were 16 years of age or older, lived, worked, or attended school in Waterloo Region, and identified as trans (n=112). Binary logistic regression was used to test associations between sociodemographic, resilience, and risk variables, and ED avoidance. Sociodemographic variables statistically significant at p<0.05 at the bivariate level were included as controls to explore different combinations of resilience and risk factor in multivariable models. Results: Participants reporting complete or partially complete medical transitions were more likely to report ED avoidance, compared to those who had not initiated medical transition. Elevated transphobia was associated with greater likelihood of avoidance. However, increasing levels of social support decreased the likelihood of avoidance. In multivariable models, social support, support from a special person, and transphobia were always significant, regardless of controlled variables. Conclusion: Transphobia-enacted in the contexts of everyday life and health care-can deter patients from seeking care. Patient-centered care requires careful attention to trans identity and health needs, especially in emergency settings. In the absence of structural changes, providers can take steps to mitigate the erasure and discrimination trans patients experience and anticipate when accessing EDs.