Influence of epicardial adipose tissue inflammation and adipocyte size on postoperative atrial fibrillation in patients after cardiovascular surgery.

Epicardial adipose tissue (EAT) is an active endocrine organ that is closely associated with occurrence of atrial fibrillation (AF). However, the role of EAT in the development of postoperative AF (POAF) remains unclear. We aimed to investigate the association between EAT profile and POAF occurrence in patients who underwent cardiovascular surgery. We obtained EAT samples from 53 patients to evaluate gene expression, histological changes, mitochondrial oxidative phosphorylation (OXPHOS) capacity in the EAT, and protein secretion in EAT-conditioned medium. EAT volume was measured using computed tomography scan. Eighteen patients (34%) experienced POAF within 7 days after surgery. Although no significant difference was observed in EAT profile between patients with and without POAF, logistic regression analysis identified that the mRNA expression levels of tumor necrosis factor-alpha (TNF-α) were positively correlated and adipocyte size in the EAT was inversely correlated with onset of POAF, respectively. Mitochondrial OXPHOS capacity in the EAT was not associated with POAF occurrence; however, it showed an inverse correlation with adipocyte size and a positive correlation with adiponectin secretion. In conclusion, changes in the secretory profile and adipocyte morphology of the EAT, which represent qualitative aspects of the adipose tissue, were present before the onset of AF.

Comparison of the disinfecting effect of sodium hypochlorite aqueous solution and surfactant on hospital kitchen hygiene using adenosine triphosphate swab testing.

The Japanese Ministry of Health requires large-scale cooking facilities to use sodium hypochlorite aqueous solution (HYP) on food preparation tools, equipment, and facilities to prevent secondary contamination. This study aimed to compare the disinfecting effect of HYP and surfactant using adenosine triphosphate (ATP) swab testing on large-scale equipment and facilities that could not be disassembled and disinfected in hospital kitchen. From May 2018 to July 2018, ATP swab tests were performed on the following six locations in the Shizuoka Cancer Centre Dietary Department Kitchen: cooking counter, mobile cooking counter, refrigerator handle, conveyor belt, tap handle, and sink. Six relative light unit (RLU) measurements were taken from each location. The log10 values of the RLU measurements were evaluated by dividing the samples into two groups: the control group (surfactant followed by HYP swabbing) and the HYP group (HYP swabbing only). The results showed that the RLUs (log10 values) in both the groups improved after disinfection (p<0.05), except for the RLUs (log10 values) of the mobile cooking counter, tap handle, and sink in the control group after the HYP swab. The changes in the RLU (log10 value) did not differ between the two groups for all locations of the kitchen. Hence, HYP swabbing of large-scale equipment and facilities provides the same level of disinfection as surfactants and can be as beneficial.

Surveillance of extended-spectrum ß-lactamase-producing Escherichia coli and Klebsiella pneumoniae at a comprehensive cancer center in Japan, 2009-2013.

We examined the results of surveillance of extended-spectrum ß-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae, which are pathogens known to cause nosocomial outbreaks, at a comprehensive cancer center in Japan over a 5-year period. We found that the admission prevalence and the incidence of ESBL-producing E coli increased during the study period, in contrast with ESBL-producing K pneumoniae, in which the parameters remained low throughout the study period.

Infection control for extrapulmonary tuberculosis at a tertiary care cancer center.

Extrapulmonary tuberculosis (TB) can be infectious when diagnostic or therapeutic procedures are performed on infected lesions. We retrospectively describe infection control and evaluate isolation failure rates during the manipulation of active extrapulmonary TB lesions at a comprehensive cancer center over a 5-year period. Among patients with a high suspicion of cancer, extrapulmonary TB was not suspected, and airborne precautions often were not used when manipulating infected lesions.

Influence of the slow infusion of a soybean oil emulsion on plasma cytokines and ex vivo T cell proliferation after an esophagectomy.

BACKGROUND: Lipid emulsions have been suggested to reduce immune responses, particularly in severely stressed patients. The authors investigated the influence of the slow intravenous infusion of a soybean oil-based lipid emulsion on some immune parameters in patients who had undergone an esophagectomy for esophageal cancer. METHODS: Thirty-two patients who had undergone an esophagectomy were randomly divided into a lipid emulsion (LPD)-treated group and a control group. All patients received parenteral feeding with a glucose-based solution. Patients in the LPD group received 100 mL of a 20% soybean oil emulsion for 7 days after the esophagectomy in addition to the glucose-based feeding. A slow infusion rate (0.09-0.12 g/kg/h) was adopted to take account of the intrinsic degradation of infused lipids. Immune responses were measured based on lymphocyte proliferation and serum concentrations of monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α). The authors also measured levels of rapid turnover proteins (ie, transferrin, prealbumin, and retinol-binding protein). RESULTS: Phytohemagglutinin- and concanavalin A-stimulated lymphocyte proliferation significantly decreased after the esophagectomy, but no significant difference was seen between the LPD and control groups. No significant difference in changes in plasma concentrations of MCP-1, IL-6 and TNF-α occurred between the 2 groups either. Plasma concentrations of rapid turnover proteins did not differ between the groups. CONCLUSIONS: These results indicate that the lipid emulsion did not affect the immune parameters measured in patients who had undergone an esophagectomy when administered at a slow rate.

Copper elicits an increase in cytosolic free calcium in cultured tobacco cells.

At concentrations greater than 0.1 mM, CuSO(4) provoked a rapid and sustained increase in the cytosolic free Ca(2+) concentration ([Ca(2+)](cyt)), in tobacco suspension culture cells expressing apoaequorin, a Ca(2+)-sensitive photoprotein. The increase was suppressed by treatment with LaCl(3), indicating that the increase is due to an influx of Ca(2+) from the apoplast through plasma membrane Ca(2+) channels. Although stimulation of H(2)O(2) production upon the CuSO(4) treatment (0.1 mM) was observed, treatment with catalase did not inhibit the increase in [Ca(2+)](cyt), and treatment with H(2)O(2) dose-dependently suppressed or delayed the increase. These results suggested that active oxygen species generated through copper-mediated reactions, or copper-mediated oxidative damages to plasma membrane, are not responsible for the increase. Treatment with sulfhydryl reagents, which alkylate or oxidize thiol groups, or acidification of the culture medium suppressed the increase in [Ca(2+)](cyt). These results demonstrated that copper causes an influx of Ca(2+) through plasma membrane Ca(2+) channels, and that plasma membrane thiol groups play an important role in activating the Ca(2+) channels.

Characterization of genes encoding metal tolerance proteins isolated from Nicotiana glauca and Nicotiana tabacum.

We have isolated a metal tolerance protein (MTP) gene, NgMTP1, from Nicotiana glauca (a potential phytoremediator plant) and two MTP genes, NtMTP1a and NtMTP1b, from Nicotiana tabacum. These three genes shared approximately 95% homology at the amino acid level. Heterologous expression of any of these three genes complemented Zn and Co tolerance in yeast mutants to a similar extent. In yeast, these proteins were shown to be located to vacuole membrane. These results suggest that the three MTPs operate by sequestering Zn and Co into vacuoles, thereby reducing the toxicity of these metals.