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A novel, simple and sensitive method for the enantioseparation of terbutaline enantiomers was developed using capillary zone electrophoresis (CZE) in combination with partial filling technique and field-amplified sample concentration. Under optimal conditions, the racemic terbutaline was resolved in less than 21 min by partially filling a fused-silica capillary with 15 mM β-cyclodextrin (β-CD, 1.9 psi, 90 s) and carrying out an electrophoresis with 50 mM phosphate buffer (pH 1.8) at 15 kV separation voltage. The sensitivity was further improved by using field-amplified sample injection (0.2 psi, 2.5 s water plug). Compared with conventional CZE, the resolution and sensitivity of two enantiomers were much improved (the detection limit decreased by 18-25-fold). Keywords: terbutaline, partial filling technique, on-line concentration, capillary electrophoresis DOI: 10.1134/S1061934815010165, Terbutaline is a [β.sub.2]-adrenergic agonist used in the treatment of asthma and lung diseases. Like many other sympathomimetic amines, terbutaline exists as two enantiomers and only the (-)-enantiomer showed the [...]

Objective: To comprehensively understand the basic construction of intensive care unit (ICU) in the secondary and tertiary hospitals in Xinjiang Uygur Autonomous Region, and to provide a theoretical basis for the development direction of critical care medicine and the rational allocation of medical resources in our region., Methods: On the March 14th, 2020, a cross-sectional survey of 147 ICU in 122 hospitals in Xinjiang Uygur Autonomous Region was conducted using an online questionnaire. The survey included 6 modules: the basic conditions of the hospital, ICU profile, ICU human resources status, equipment allocation, technology development, and ICU quality control., Results: Among the 147 ICUs, there were 69 ICUs in tertiary hospital and 78 ICUs in secondary hospital. 75.51% (111/147) were comprehensive ICU and 24.49% (36/147) were specialized ICU. The total number of ICU beds was 1 818, accounted about 2.43% (1 818/74 912) of the total number of hospital beds. In ICU terms of human resourse, physicians/beds ratio was 0.54:1, and nurses/beds ratio was 1.55:1. Physicians/beds ratio in the secondary hospitals was 0.52:1, and nurses/beds was 1.45:1; physicians/beds ratio in the tertiary hospital was 0.56:1, and nurses/beds ratio was 1.79:1. The ICU management model was mainly closed management (82.99%, 122/147), and the proportion of closed management in tertiary hospitals was 88.41% (61/69), which was higher than that in secondary hospitals (78.21%, 61/78). In aspect of ICU equipment, the invasive ventilator/bed ratio, enteral nutrition infusion pump/bed ratio, and blood purifier/bed ratio in the tertiary hospitals were significantly higher than those in the secondary hospitals [0.70 (0.46, 1.00) vs. 0.45 (0.33, 0.67), 0.18 (0.00, 0.56) vs. 0.00 (0.00, 0.13), 0.08 (0.00, 0.13) vs. 0.00 (0.00, 0.10), respectively, all P < 0.01]. In the tertiary hospital, the chest sputum excretion device, blood gas analyzer, blood purification instrument, transport ventilator, fiber bronchoscope, enteral nutrition infusion pump, bedside ultrasound machine, continuous hemodynamics and oxygen metabolism monitor, electroencephalogram bispectral index monitor, bedside electroencephalography machine and extracorporeal membrane oxygenation (ECMO) were also superior to the secondary hospitals. ICU technologies, such as deep venipuncture, jejunal nutrition tube placement, percutaneous tracheotomy, invasive blood pressure monitoring, invasive hemodynamic monitoring, bedside ultrasound examination, continuous blood purification, fiber bronchoscopy, high frequency ventilation, intra-aortic balloon counterpulsation (IABP), and ECMO had also performed better than secondary hospitals. In the management of ICU medical quality control, in tertiary hospitals, the proportions of single or isolated room for patients with drug-resistant bacteria, 1-hour bundle and hemodynamic monitoring for patients with septic shock, routine prone position ventilation and lung recruitment for patients with acute respiratory distress syndrome (ARDS), common analgesic, and use of personal digital assistant (PDA) for pre-operation scan code by nurses and electronic medical record for routine rounds were significantly higher than those in secondary hospitals (91.30% vs. 85.90%, 68.12% vs. 48.72%, 85.51% vs. 70.51%, 28.99% vs. 12.82%, 85.51% vs. 61.54%, 76.81% vs. 61.54%, 71.01% vs. 29.49, 49.28% vs. 28.21%, respectively), and the differences were statistically significant (all P < 0.05). 89.74% (70/78) ICU in secondary hospitals and 89.86% (62/69) of tertiary hospitals used acute physiology and chronic health evaluation II (APACHE II) to evaluate the severity of critically ill patients; in terms of sequential organ failure assessment (SOFA), the difference between the secondary hospitals and the tertiary hospitals was not statistically significant (51.28% vs. 62.32%, χ 2 = 1.814, P = 0.178)., Conclusions: Although the ICU construction of the tertiary hospitals in Xinjiang Uygur Autonomous Region is more complete than secondary hospitals, there is a big gap between the requirements of the national guidelines and the developed regions in the east. The ICU's investment in human resource, equipment and supporting facilities allocation, promotion of suitable technology, and medical quality control management should be increased to promote the development of critical care medicine in Xinjiang Uygur Autonomous Region.

Sepsis associated encephalopathy is a common complication of sepsis, but its pathogenesis of sepsis-associated encephalopathy remains unclear. Astrocytes are the most abundant brain glial cells, and reactive astrogliosis, a pathological response to central nervous system diseases, has a clear disease and disease-stage specificity. Functional changes of astrocytes are of great significance for the detection and prognosis of sepsis-associated encephalopathy. The pathogenesis of sepsis-associated encephalopathy was explored at the cellular level by examining astrogliosis in an in vitro model of sepsis-associated encephalopathy. Astrocytes of Wistar neonatal rats were incubated with different concentrations of lipopolysaccharide combined with interferon-γ. Cell viability was assessed by levels of tumor necrosis factor-α, interleukin-6, nitric oxide, reactive oxygen species, glial fibrillary acidic protein, changes of astrocyte morphology, and prevalence of apoptosis and necrosis. Compared with the control group, the cell viability of treated groups was decreased. The levels of tumor necrosis factor-α, interleukin-6, nitric oxide, reactive oxygen species, and glial fibrillary acidic protein were increased, hypertrophy of astrocytes was observed, and apoptosis was increased. The pathogenic outcomes of astrogliosis in sepsis-associated encephalopathy is discussed and a new tool provided to explore the pathogenesis of sepsis-associated encephalopathy at the cellular level., Competing Interests: The authors declare no competing interests., (© 2019 Hua et al. Published by IMR press.)

Objective: To evaluate the cardiac function of cecal ligation and puncture (CLP) induced sepsis rats with high-resolution ultrasound., Methods: According to the method of random number table, 48 adult male Sprague-Dawley (SD) rats were randomly divided into normal control group and sepsis 6, 12, 24, 30, 48 hours groups, with 8 rats in each group. The sepsis model was produced by CLP, and the rats in the normal control group were only anesthetized and resuscitated. The general situation after modeling in each group was observed, and the left ventricular function was assessed by high-resolution echocardiography at all the time points. The abdominal aorta blood of rats was collected, and the serum levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and MB isoenzyme of creatine kinase (CK-MB) were determined by enzyme-linked immunosorbent assay (ELISA). The myocardial tissue was harvested, and the pathological changes in myocardial tissue were observed by hematoxylin-eosin (HE) staining., Results: The rats challenged to CLP displayed symptoms of sepsis, such as depression, ruffled fur, decreased diet and activity, and the symptoms became more obvious with the extension of time. High-resolution echocardiography could clearly show the structure of left ventricle in each group and obtain satisfactory M-mode echocardiography of left ventricle. The heart rate (HR) of rats in all sepsis groups was elevated with the increase in model time as measured by high-resolution ultrasound, and it was significantly higher than that in the normal control group at 12, 24, 30 hours (bpm: 359.66±23.33, 361.35±12.85, 392.67±11.33 vs. 306.24±29.79, all P < 0.05). Stroke volume (SV) and cardiac output (CO) in sepsis rats were decreased with the increase in model time, while left ventricular ejection fraction (LVEF) and left ventricular fractional shortening (LVFS) were increased first and then decreased, and SV and LVEF in sepsis 48 hours group were significantly lower than those in the normal control group [SV (μL): 78.43±17.52 vs. 122.61±15.88, LVEF: 0.763±0.018 vs. 0.902±0.011, both P < 0.05]. Left ventricular weight (LVW) in all sepsis groups was increased to different degrees as compared with that in the normal control group, as well as the left ventricular anterior and posterior wall thickness increased in diastole and systole. Compared with the normal control group, the left ventricular posterior wall thickness was increased significantly at the end of diastolic and systolic period in the sepsis 12 hours group, and the left ventricular anterior wall thickness was also increased significantly at the end of diastolic period in the sepsis 48 hours group. The serum levels of TNF-α, IL-1β and CK-MB in sepsis rats were increased first and then decreased with the extension of model making time. The above parameters in the sepsis 48 hours group were still significantly higher than those in the normal control group [TNF-α (ng/L): 61.59±3.99 vs. 16.87±4.89, IL-1β (ng/L): 255.03±13.23 vs. 119.59±10.43, CK-MB (μg/L): 1.27±0.15 vs. 0.52±0.15, all P < 0.05]. HE staining showed that the myocardial striations of the rats in the normal control group were clear and complete, with normal morphology and orderly arrangement of cardiac cells. However in the sepsis groups, myocardial cells were swollen, ruptured and necrotic, and inflammatory cells were infiltrated, with myocardial fibers ruptured and necrosis dissolved, and the above pathological manifestations gradually increased with the extension of the model making time., Conclusions: High-resolution ultrasound can evaluate the cardiac function of CLP induced sepsis rat model more comprehensive, and the consequence of evaluation index is consistent with the expression level of myocardial enzyme and histopathologic manifestations.

Resolvins, an endogenous lipid mediator derived from eicosapentaenoic acid (EPA) or docosahexaenoic acid (DHA) of fish oil, has been reported to have anti-inflammatory and antitumor effect in various pathogenic processes. However, there are no studies about the effects of resolvin D1 and E1 on concanavalin A-induced hepatitis. Hence, the present study is to illustrate whether resolvin D1 and E1 inhibit concanavalin A-induced liver injury, liver cancer and underlying mechanisms by which they may recover. C57BL/6 mice were pretreated with resolvin D1 and E1 for 4 h, and then injected with concanavalin A for 12 h. Subsequently, blood and liver tissue were collected at 0, 2, 4, 8 and 12 h for different analysis. Analysis of inflammatory cytokines indicated that the inhibition of necrosis factor (TNF)-α, interferon (IFN)-γ, interleukin (IL)-2, IL-1β and IL-6 could be performed by resolvin D1 and E1. Moreover, Toll-like receptor (TLR) 4 expression, NF-κB and AP-1 activity also have been confirmed to have key roles in the development of liver injury. They were significantly suppressed in the treatment group, compared to model. In addition, resolvin D1 and E1 markedly downregulated CD4+ and CD8+ cell infiltration in the liver. A long-term concanavalin A treatment for 32 weeks was performed to analyze the changes of hepatitis to liver cancer and the antitumor effect of resolving D1 and E1. These results indicated that resolvin D1 and E1 prevent concanavalin A-induced liver injury and the changes of hepatitis to liver cancer in mice through inhibition of inflammatory cytokine secretion and NF-κB/AP-1 activity. Thus, they could be novel target to be considered in the process of finding sufficient drug to protect against various forms of hepatitis and liver cancer.