The goal of the this study was to evaluate the mutagenic/antimutagenic effects of conventional (BRS133) and transgenic (BRS 245 RR) soybeans (CS and TS, respectively) in vivo using the bone marrow ...micronucleus (MN) test, histopathological analysis, chromosome aberration test (CAT), and mitotic index (MI) determination. Six-week-old male Swiss mice were fed with pelleted commercial diet mixed with CS or TS at 10% or 20%. Two experimental designs (MN and CAT) were conducted simultaneously with 10 groups each during a 15-day period. Animals were treated with pelleted commercial diet, CS (10% or 20%), or TS (10% or 20%), and on day 14 they also received cyclophosphamide (CP) (50 mg/kg i.p.). The 10% and 20% CS and TS diets did not significantly decrease the frequencies of micronucleated polychromatic erythrocytes in bone marrow induced by CP. However, the CAT indicated that the 10% and 20% CS diets significantly (P < .05) protected nucleated bone marrow cells against chemical-induced mutagenesis and also produced a significant (P < .05) decrease in the total percentage of spontaneous aberrations. Among the treatments with TS, only the 10% TS diet reduced the percentage of total aberrations induced by CP. The results also indicated that the treatment with 20% TS alone significantly (P < .05) decreased the MI, indicating cytotoxic effects related to the treatment. Taken together, our results suggest that, under the tested conditions, TS and CS have antimutagenic properties and are not toxic.
Abstract Background Liver transplantation (LT) is a curative treatment option for hepatocellular carcinoma (HCC); recurrent HCC after liver transplantation (HCC-R) is diagnosed in 9%–16%. The ...objective of this study was to evaluate which factors are associated with R-HCC after liver transplantation. Methods This retrospective real-life study analyzed 278 LTs from 3 reference centers (2,093 LTs) in Brazil from 1988 to 2015. HCC-R with histologic confirmation was seen in 40 patients (14.4%). Results Most of them were male with cirrhosis secondary to viral hepatitis. Only 37.5% underwent chemoembolization, and 50% had cold ischemia time >8 hours. From the explant analysis, most of the patients were outside Milan criteria and 37.5% had microvascular invasion. The donors were mostly male, and the median intensive care unit time was >3 days. The Kaplan-Meier survival was lower according to alpha-fetoprotein (AFP) >200 ng/dL ( P = .02), and older donors and more blood transfusions were risk factors for HCC-R death. Conclusion AFP >200 ng/mL was associated with lower survival, and older donors and more blood transfusions were risk factors for death after HCC-R. A trend to lower survival was observed in patients who did not have chemoembolization and had cold ischemia times >8 hours.
The genotoxicity of the anaesthetic MS222 (tricaine) was analysed in fish under both in vivo and in vitro conditions. Based on results of the single cell gel/Comet assay, MS222 had no direct ...genotoxic effect on the experimental fish, indicating that MS222 does not induce primary DNA damage. These results suggest that the use of this important anaesthetic in aquaculture can be considered to be safe in terms of genotoxicity.
Objective: Liver fibrosis results from the perpetuation of the normal wound healing response to several types of injury. Despite the wealth of knowledge regarding the involvement of intracellular and ...extracellular signaling pathways in liver fibrogenesis, information about the role of intercellular communication mediated by gap junctions is scarce.
Methods: In this study, liver fibrosis was chemically induced by carbon tetrachloride in mice lacking connexin32, the major liver gap junction constituent. The manifestation of liver fibrosis was evaluated based on a series of read-outs, including collagen morphometric and mRNA analysis, oxidative stress, apoptotic, proliferative and inflammatory markers.
Results: More pronounced liver damage and enhanced collagen deposition were observed in connexin32 knockout mice compared to wild-type animals in experimentally triggered induced liver fibrosis. No differences between both groups were noticed in apoptotic signaling nor in inflammation markers. However, connexin32 deficient mice displayed decreased catalase activity and increased malondialdehyde levels.
Conclusion: These findings could suggest that connexin32-based signaling mediates tissue resistance against liver damage by the modulation of the antioxidant capacity. In turn, this could point to a role for connexin32 signaling as a therapeutic target in the treatment of liver fibrosis.
Burnout syndrome (BO) may be increased during periods of high work and emotional stress, as occurred in the 2019 coronavirus disease pandemic (COVID-19). Resident physicians appear to be more exposed ...due to the higher workload, prolonged exposure and the first contact with patients. To compare the incidence of burnout syndrome before and during the COVID 19 pandemic in cardiology residents. A prospective study was carried out. The Maslach questionnaire was implemented in cardiology residents of an institution of the City of Buenos Aires, in the month of September 2020, during the COVID-19 pandemic and the results were compared with those prospectively collected in the same population during September of 2019. The survey was anonymous. The questionnaire was responded by 39 residents (2019: 16; 2020: 23). Burnout was observed in 30% (n = 7) in 2019, and in 39% (9%) residents during the COVID-19 pandemic (P= 0.77). The median score for emotional exhaustion was 38 (IQR 29-43) for the 2020s group, and 34 (IQR 27-42) for the 2019 (P = 0.32). The median score for depersonalization was 12 (IQR 5-19) and 15 (IQR 11-18) for 2020 and 2019 respectively (P = 0.50). The median score for personal accomplishment in the 2020s group was 30 (IQR 23-37) and 31 (IQR 26-35) in the 2019s (P = 0.28). The COVID-19 pandemic was not associated with an increase in the incidence of burnout in cardiology residents, who already report a significant prevalence of this syndrome in pre pandemic period. We emphasize the importance of creating prevention strategies aimed at improving resident's working conditions and quality of life, especially in periods of high stress and workload such as a global health emergency.
To examine the effects of resistance training (RT) on metabolic syndrome-related phenotypes in postmenopausal women.
Twenty-two postmenopausal women (65.0±4.2 years) underwent 12 weeks of whole body ...progressive training with intensity prescribed based on rating of perceived exertion. Dominant knee extension strength was assessed using an isokinetic dynamometer before and after the intervention. Moreover, all volunteers had blood samples collected for lipid profile, glycemic control, and C-reactive protein analyses. Waist circumference and arterial blood pressure were also measured at baseline and after the training period. Student's t-tests for paired samples and repeated measures ANOVA were used to compare dependent variables, and statistical significance was set at P<0.05.
Isokinetic muscle strength significantly increased (P<0.01) with training. It was observed that waist circumference as well as total and low-density lipoprotein cholesterol levels significantly decreased with training (P<0.01). Total cholesterol/high-density lipoprotein cholesterol ratio, an important marker of cardiovascular disease incidence, was also significantly reduced (from 3.91±0.91 to 3.60±0.74; P<0.01) after the program. Blood glucose, basal insulin, and homeostatic model assessment of insulin resistance were also significantly reduced (P<0.01). No significant alterations were observed for resting blood pressure, triglycerides, or C-reactive protein.
Based on the observed results, it can be concluded that a 12-week progressive RT program, besides increasing isokinetic muscle strength, induces beneficial alterations on metabolic syndrome-related phenotypes in postmenopausal women. These findings highlight this mode of exercise as an important component of public health promotion programs for aged women. RT improves isokinetic strength and metabolic syndrome-related phenotypes in postmenopausal women.
Abstract
Background
The European Society of Cardiology (ESC) recommends the use of a 0/1h-algorithm for rapid triage of patients with suspected non-ST-elevation myocardial infarction (NSTEMI). To ...date, its impact on patient management and ultimately also safety when routinely applied in emergency departments (ED) is unknown. We therefore aimed to determine these important real-world outcome data.
Methods
In a prospective international multicenter study enrolling unselected patients presenting with suspected NSTEMI to the ED, we assessed the real-world feasibility, adherence, efficacy, effectiveness, and safety of the ESC 0/1h-algorithm using high-sensitivity cardiac troponin T embedded in routine clinical care. Patients with ST-segment elevation myocardial infarctions were excluded. Safety was quantified by the 30-day incidence of major adverse cardiac events (MACE, defined as the composite of cardiovascular death and myocardial infarction including the index event) in the rule-out group and in outpatients.
Results
Among 2296 patients, NSTEMI prevalence was 9.8% (224/2296). Feasibility was very high with a median time to the “1h-draw” of 65 minutes q1 61, q3 72. Adherence was very high with 94% (95% confidence interval CI, 93–95) of patients managed without protocol violations. Effectiveness was very high: 98% (95% CI, 97–98) of patients triaged towards rule-out by the ESC 0/1h-algorithm did not require additional cardiac investigations including hs-cTnT measurements at later time points (e.g. 3–12h) or coronary CT-angiography in the ED. Median time to discharge from the ED was 150 q1134, q3235 minutes in the overall population. The ESC 0/1h-algorithm triaged 62% (95% CI, 60–64) of patients towards rule-out and 13% (95% CI, 12–14) towards rule-in of NSTEMI. Overall, 71% (95% CI, 69–72) of patients underwent outpatient management (Figure 1). Safety of rule-out and outpatient management were very high with a 30-day MACE incidence of 0.2% (95% CI, 0–0.5) and 0.1% (95% CI, 0–0.2), respectively. These findings were consistent in several predefined subgroups.
Figure 1
Conclusions
These real-world data document the excellent feasibility, adherence, effectiveness, efficacy and safety of the ESC 0/1h-algorithm for the rapid management of patients presenting with suspected NSTEMI to the ED when applied in routine clinical practice.
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