LINC00839 Promotes the Progression of Gastric Cancer by Sponging miR-1236-3p.

In this paper, LINC00839 expression in gastric cancer (GC) was confirmed by real-time quantitative PCR. The function of LINC00839 in GC was detected by loss of function assays. Luciferase assays was performed to confirm the interaction between LINC00839 and miR-1236-3p. Then we investigated the regulatory effect of LINC00839 on miR-1236-3p. The results confirmed that the expression level of LINC00839 in GC was significantly up-regulated. LINC00839 could promote GC cell proliferation, mobility, and invasion. The detection of luciferase reporter gene confirmed that LINC000839 could bind to the binding site of miR-1236-3p. Our findings suggest that LINC00839 promotes GC progression through sponging miR-1236-3p.

[Clinical features and high resolution CT imaging evolution of coronavirus disease 2019].

Objective: To investigate the clinical manifestations of the clinical characteristics of 141 patients with coronavirus disease 2019 (COVID-19) and the imaging evolution characteristics of High Resolution CT (HRCT) in the chest. Methods: From January 20, 2020 to February 8, 141 COVID-19 patients in Renmin Hospital of Wuhan University, 77 males and 64 females, with a median age of 49 (9,87) , were retrospectively analyzed. The clinical features, laboratory examination indexes and HRCT evolution findings of 141 COVID-19 patients were analyzed. Results: Laboratory examinations of 141 COVID-19 patients showed a decrease in white blood cell count and lymphocyte ratio. Among the 141 patients with COVID-19, fever (>37.5 â„ƒ) was the most common clinical manifestation in 139 cases (98.58%) , and occasionally non-respiratory symptoms such as diarrhea in 4 cases (2.84%) . 141 patients with COVID-19 had abnormal HRCT. 52 (36.88%) chest HRCT images showed ground-glass opacity (GGO) , mainly under pleural; 23 (16.31%) GGO with focal consolidation; 27 (19.15%) small flaky shadows; 20 cases (14.18%) large flaky consolidation shadows; 48 cases (34.04%) bronchovascular bundle thickening and vascular penetrating signs; 5 cases (3.55%) had air bronchial signs; 7 cases (4.96%) of small nodule shadows; 5 cases (3.55%) of fibrosis, grid shadows or strand shadows.135 cases (95.74%) were positive for the first time nucleic acid test, 6 cases (4.26%) were negative, and 71 cases (50.35%) of common type, 47 cases (33.33%) of severe type and 23 cases (16.31%) of critical type were found during the same period. The average time from onset of each type to the first CT examination was: (2.51±1.32) , (5.02±2.01) , and (5.91±1.76) days; 19 (19/47, 40.43%) of which were severe for the first time CT classification worsened at the second examination and lessened at the third examination. 141 cases (100%) were positive for the second nucleic acid test, and the HRCT results for the same period were 44 cases (31.21%) of common type, 53 cases (37.59%) of severe type, and 44 cases (31.21%) of critical type; the average interval time was (3.32±1.61) , (3.93±1.84) , (4.15±1.57) days;the third nucleic acid test were positive among 113 cases and 28 cases were negative, HRCT results of the same period were 79 cases (56.03%) of common type, 46 cases (32.62%) of severe type, and 16 cases (11.35%) of critical type;the average interval from the first CT examination were: (5.59±1.83) , (7.32±1.37) , (7.55±1.78) days. The differences in CT typing at different time were statistically significant (P<0.05) . Conclusion: The clinical features of COVID-19 and HRCT images are diverse, extensive GGO and infiltrates in both lungs are typical. Viral nucleic acid tests usually occur earlier or at the same time as the CT examination positive, and there are false negatives in nucleic acid tests. In some epidemiological backgrounds, CT imaging manifestations and evolutionary characteristics are of great significance for early warning of lung injury, assessment of disease severity, and assistance in clinical typing and post-treatment follow-up.

[Influence of hypertension disorder complicating pregancy and its interaction with other factors on incidence of small for gestational age].

Objective: To understand the influence of hypertension disorder complicating pregancy on the incidence of small for gestational age (SGA) and its interaction with other factors. Methods: A nested case-control study was conducted to analyze the influence of hypertension disorder complicating pregancy on the incidence of small for gestational age and evaluate the interaction between hypertension disorder complicating pregancy and other factors. Results: Data from 6 297 subjects were collected, including 836 (13.28%) pregnant women with hypertension disorder complicating pregancy, 789 (12.53%) infants who were small for gestational age. Compared with the pregnant women without hypertension disorder complicating pregancy, women with hypertension disorder complicating pregancy (aOR=2.185, 95% CI: 1.266-3.770), preeclampsia- eclampsia (aOR=5.322, 95% CI: 4.224-6.707) and with chronic hypertension complicated with superimposed preeclampsia (aOR=3.794, 95% CI: 2.190-6.573) had increased risk for the incidence of small for gestational age. The Interaction analysis showed that there was strong positive interactions between hypertension disorder complicating pregancy and premature birth on small for gestational age infants (RERI=5.260, AP=0.586, SI=2.941), (OR=2.331, 95%CI: 1.443-3.767). Addictive interaction was found between hypertension disorder complicating pregancy and placental abruption (RERI=5.631, AP= 0.522, SI=2.352), and between hypertension disorder complicating pregancy and female fetuses (RERI= 3.660, AP=0.374, SI=1.714), and between hypertension disorder complicating pregancy and oligohydramnios (RERI=10.619, AP=0.636, SI=3.093). However, no significant multiplication interaction was found. Conclusions: Hypertension disorder complicating pregancy is the risk factor of the incidence of small for gestational age. Hypertension disorder complicating pregancy also showed addictive interaction on the incidence of small for gestational age with female fetuses, placental abruption as well as oligohydramnios. There was addictive and multiplication interactions between hypertension disorder complicating pregancy and premature birth.

Studies on fish and pork paste gelation by dynamic rheology and circular dichroism.

The muscle paste of fish, pork, and their mixtures were prepared to study the gelling characteristics by dynamic rheological measurement. The gelation mechanisms of muscle paste were also investigated by circular dichroism. Gel formation of fish paste occurred in 2 steps of 5 to 35 and 51 to 90 degrees C respectively, while pork paste mainly in 1 step of 49 to 72 degrees C. Gel formation was relative to the alpha-helix unfolding of myosin, which responded the melting temperatures of 40 and 50 degrees C for fish myosin and 50 and 60 degrees C for pork myosin, respectively. Alpha-helix unfolding of myosin was beneficial for gel formation. During gel formation, G' of muscle paste was linearly related to alpha-helical content of myosin. The interactions of fish and pork proteins at high temperature (>35 degrees C) could change the gel forming characteristics of muscle paste. Mixed paste exhibited a similar gelation pattern to individual fish paste with 2 visible increases in G'. Addition of pork could suppress the breakdown of fish gel structure at approximately 50 degrees C. Mixing pork and silver carp in a certain ratio could improve the gel properties of silver carp products.

The antioxidant activities of natural sweeteners, mogrosides, from fruits of Siraitia grosvenori.

To search for antioxidant agents from natural resources, in this paper the in vitro antioxidant activities of two natural sweeteners, mogroside V and 11-oxo-mogroside V isolated from the fruits of Siraitia grosvenori, were determined using chemiluminescence (CL). The results showed that these sweet glycosides, having cucurbitane triterpenoid aglycon, exhibited significant inhibitory effects on reactive oxygen species (O2-, H2O2 and *OH) and DNA oxidative damage. 11-oxo-mogroside V showed a higher scavenging effect on O2- (concentration at which 50% of chemiluminescence intensity is inhibited [EC50] =4.79 microg/ml) and H2O2 (EC50 = 16.52 microg/ml) than those of mogroside V. However, mogroside V was more effective in scavenging *OH, with EC50 =48.44 microg/ml compared with that of 11-oxo-mogroside V (EC50 = 146.17 microg/ml). Further, 11 -oxo-mogroside V exhibited a remarkable inhibitory effect on *OH-induced DNA damage with EC50 = 3.09 microg/ml.

Determination of ginkgolic acids from Ginkgo biloba leaves by reversed-phase argentation high performance liquid chromatography.

An analytical method has been firstly achieved for the quantification of ginkgolic acids from Ginkgo biloba leaves by reversed-phase argentation high performance liquid chromatography. Analytical sample was cleaned-up after addition of acidic salt solution and adsorbent to the matrix solution by counter-extraction of analytes with hexane. Ginkgolic acids were determined by HPLC with methanol and 5% aqueous acetic acid (90:10, V/V) containing 0.03 mol.L-1 silver ion as mobile phase and UV detection at 310 nm. Results showed ginkgolic acids were separated successfully from each other and from other interfering components, which were confirmed by spectra analysis and purity assay. The linearity of the calibration curve was good in the range of 0.084 microgram-10.56 micrograms (r = 0.9998). The average recovery was 97.3% and RSD was 1.6%. The detection limit was 0.026 microgram (S/N = 3). The convenient method can be used as a reliable tool for the quantitative analysis of ginkgolic acids.

[Separation and quantitative analysis of ginkgolic acids from Ginkgo biloba leaves by reverse phase argentation high performance liquid chromatography].

AIM: To develop a reverse phase argentation high performance liquid chromatographic (RP-AHPLC) method for the separation and determination of ginkgolic acids. METHODS: Liquid chromatography-electrospray ionization mass spectrometry (LC/ESI-MS) was applied to identify ginkgolic acids from Ginkgo biloba leaves and four ginkgolic acids of the samples were separated and quantified by RP-AHPLC. Leaves were extracted with ethanol and analytes were extracted with hexane after addition of acid/salt solution and adsorbent to matrix solution. Ginkgolic acids were separated and determined within 30 minutes by RP-AHPLC under optimum chromatographic conditions. Methanol and 5% aqueous acetic acid (90:10) containing 0.03 mol.L-1 silver ion was used as mobile phase, column temperature was selected at 30 degrees C, flow rate was 1.0 mL.min-1, UV detection wavelength was at 310 nm. The spectra analysis and purity identification of chromatographic peaks of ginkgolic acids were further confirmed by means of diode array detection. RESULTS: Four ginkgolic acids were baseline separated from each other and from other interfering components. The average recovery and relative standard deviation of the method were 97.3% and 1.6%, respectively. CONCLUSION: RP-AHPLC was an excellent method for separation of homologous with different carbon atom numbers and double bond. The method is useful for the quality control of extract of Ginkgo biloba leaves.