Quality assurance in cardiovascular and interventional radiology.

In summary, quality assurance in medicine and in CVIR must be an important part of daily practice. The JCAHO is gradually moving toward quality improvement as a goal, rather than simply monitoring performance. Physicians must lead the way in dealing with the issues of monitoring performance, with the ultimate goal being the welfare of their patients. The model SCVIR QA program described above will help cardiovascular and interventional radiology sections of all sizes to meet these goals. Resources applied toward QA activities are investments for maximizing efficiency and productivity, while minimizing morbidity and mortality. These well-spent efforts will hopefully decrease the spiraling costs of medical care.     

Inflammatory tumour cell killing by oncolytic reovirus for the treatment of melanoma

Reovirus is a promising unmodified double-stranded RNA (dsRNA) anti-cancer oncolytic virus, which is thought to specifically target cells with activated Ras. Although reovirus has been tested in a wide range of preclinical models and has entered early clinical trials, it has not previously been tested for the treatment of human melanoma. Here, we show that reovirus effectively kills and replicates in both human melanoma cell lines and freshly resected tumour; intratumoural injection also causes regression of melanoma in a xenograft in vivo model. Reovirus-induced melanoma death is blocked by caspase inhibition and is dependent on constituents of the Ras/RalGEF/p38 pathway. Reovirus melanoma killing is more potent than, and distinct from, chemotherapy or radiotherapy-induced cell death; a range of inflammatory cytokines and chemokines are released by infected tumour cells, while IL-10 secretion is abrogated. Furthermore, the inflammatory response generated by reovirus-infected tumour cells causes bystander toxicity against reovirus-resistant tumour cells and activates human myeloid dendritic cells (DC) in vitro. Hence, reovirus is suitable for clinical testing in melanoma, and may provide a useful danger signal to reverse the immunologically suppressive environment characteristic of this tumour.     

Rethinking “Elective” Procedures for Women's Reproduction during Covid-19

Common hospital and surgical center responses to the Covid-19 pandemic included curtailing “elective” procedures, which are typically determined based on implications for physical health and survival. However, in the focus solely on physical health and survival, procedures whose main benefits advance components of well-being beyond health, including self-determination, personal security, economic stability, equal respect, and creation of meaningful social relationships, have been disproportionately deprioritized. We describe how female reproduction-related procedures, including abortion, surgical sterilization, reversible contraception devices and in vitro fertilization, have been broadly categorized as “elective,” a designation that fails to capture the value of these procedures or their impact on women's overall well-being. We argue that corresponding restrictions and delays of these procedures are problematically reflective of underlying structural views that marginalize women's rights and interests and therefore threaten to propagate gender injustice during the pandemic and beyond. Finally, we propose a framework for triaging reproduction-related procedures during Covid-19 that is more individualized, accounts for their significance for comprehensive well-being, and can be used to inform resumption of operations as well as subsequent restriction phases.     

Associations between the Nutrient Profiling System Underlying the Nutri-Score Nutrition Label and Biomarkers of Chronic Low-Grade Inflammation: A Cross-Sectional Analysis of a Middle- to Older-Aged Population

Low-grade systemic inflammation is associated with a range of conditions. Diet may modulate inflammation and public health strategies are needed to guide consumers’ dietary choices and help prevent diet-related disease. The Food Standards Agency nutrient profiling system (FSAm-NPS) constitutes the basis of the five-colour front-of-pack Nutri-Score labelling system. No study to date has examined FSAm-NPS dietary index associations with biomarkers of inflammation. Therefore, our objective was to test relationships between the FSAm-NPS and a range of inflammatory biomarkers in a cross-sectional sample of 2006 men and women aged 46–73 years. Individual participant FSAm-NPS scores were derived from food frequency questionnaires. Pro-inflammatory cytokine, adipocytokine, acute-phase response protein, coagulation factor and white blood cell count concentrations were determined. Correlation and linear regression analyses were used to examine FSAm-NPS relationships with biomarker levels. In crude and adjusted analyses, higher FSAm-NPS scores, reflecting poorer nutritional quality, were consistently and positively associated with biomarkers. In fully adjusted models, significant associations with concentrations of complement component 3, c-reactive protein, interleukin 6, tumour necrosis factor alpha, resistin, white blood cell count, neutrophils, eosinophils and the neutrophil-to-lymphocyte ratio persisted. These results suggest that dietary quality, determined by Nutri-Score rating, is associated with inflammatory biomarkers related to health.     

Formation of an N-nitrosamine by oxidation

Tolazamide, an antidiabetic drug, was found to produce N-nitrosohexamethyleneimine (NHM) upon exposure to an oxidizing agent and in the absence of a nitrosating agent. The oxidizing agents were either hydrogen peroxide or oxygen.     

In Vitro Activity of Retapamulin and Antimicrobial Susceptibility Patterns in a Longitudinal Collection of Methicillin-Resistant Staphylococcus aureus Isolates from a Veterans Affairs Medical Center

Mupirocin is a topical antimicrobial used to decolonize patients who carry methicillin-resistant Staphylococcus aureus (MRSA), and the topical agent retapamulin may be a potential alternative therapy. The goal of this study was to determine the in vitro activity of retapamulin as well as a panel of 15 antimicrobial agents, including mupirocin, for 403 MRSA isolates collected longitudinally from a naive population at the Veterans Affairs Puget Sound Health Care System. The MICs for retapamulin had a unimodal distribution, ranging from 0.008 to 0.5 μg/ml. One isolate had an MIC of >16 μg/ml, was also resistant to clindamycin and erythromycin, and was recovered from the nares of a patient undergoing hemodialysis. Twenty-four isolates (6%) and 11 isolates (3%) demonstrated low-level resistance (MICs of 8 to 64 μg/ml) and high-level resistance (MICs of ≥512 μg/ml), respectively, to mupirocin. Isolates were recovered from 10 patients both before and after mupirocin therapy. Of those, isolates from 2 patients demonstrated MIC changes postmupirocin therapy; in both cases, however, strain typing demonstrated that the pre- and postmupirocin strains were different. A total of 386 isolates (96%) had vancomycin MICs of ≤1.0 μg/ml; 340 isolates (84%) were resistant to levofloxacin, 18 isolates (4.5%) were resistant to trimethoprim-sulfamethoxazole, and 135 isolates (33%) had elevated MICs of 4 μg/ml for linezolid. The baseline levels of resistance were low for mupirocin (9%) and even lower for retapamulin (0.25%) Although the use of mupirocin is currently the standard therapy for decolonization practices, the activity of retapamulin warrants its consideration as an alternative therapy in MRSA decolonization regimens.