Effect of C3G overexpression on proliferation and apoptosis of high glucose-induced H9C2 cardiomyocytes / 重庆医学

Objective To observe the effects of Crk-SH3 domain guanine exchange factor(C3G)overexpression on the pro-liferation and apoptosis of high glucose-induced H9C2 cardiomyocytes.Methods H9C2 cardiomyocytes were transiently transfected with pCXN2-Flag(empty plasmid)and pCXN2-Flag-hC3G(human C3G mRNA)plasmids,then conducted high glucose(HG)in-tervention.The experiment was divided into the blank group,empty vector group,C3G overexpression group,blank + HG group, empty vector + HG group and C3G overexpression+ HG group.The C3G protein expressions,apoptosis and proliferation rate were respectively detected in each H9C2 cardiomyocytes groups.Results The proliferation rate in the blank+ HG group and empty vec-tor+ HG group were significantly decreased compared with the blank group and empty vector group,while the apoptosis rate was significantly increased.Compared with blank group and empty vector group,blank + HG and empty vector + HG group,the C3G protein expression and proliferation rate in the C3G overexpression group and C3G overexpression+ HG group were increased sig-nificantly,while the apoptosis rate was decreased significantly.Conclusion High glucose inhibits H9C2 myocardial cell proliferation and promots its apoptosis;furthermore,C3G overexpression can reversed the decrease of high glucose-induced H9C2 cardiomyocyte prolifer-ation rate and apoptosis increase.C3G overexpression can promote the survivability of high glucose-induced H9C2 cardiomyocytes.

Dampness Can Promote the Influenza A Virus and Worsen Its Prognosis by Upregulating the TLR7 Signaling Pathway.

Context • Outbreaks of the influenza A virus (IAV) are increasingly recognized as a global public health issue, affecting a large proportion of the world's population. A number of studies have provided epidemiologic evidence that dampness and mold are consistently associated with multiple allergic and respiratory effects, but they focused on dampness-related pathogenic microorganisms leading to allergy rather than the dampness itself. Objective • The current study intended to examine the effects of a damp environment on the promotion of the IAV and determine the adverse effects on its prognosis through upregulation of the toll-like receptor 7 (TLR7)-signaling pathway in the lung. Design • The research team performed an animal study. Setting • The study was performed at Jinan University (Guangzhou, China). Animals • A total of 144 specific-pathogen-free, C57BL/6j mice were included in the study, divided into 6 groups with 24 mice in each group. Intervention • The mice were randomly divided into the 6 groups, with 24 mice in each group: (1) group A: normal mice, a control group; (2) group B: normal mice living in a damp environment, a second control group; (3) group C: virally infected mice living in a normal environment; (4) group D: virally infected mice living in a damp environment; (5) group E: virally infected mice living in a normal environment and receiving treatment with 0.2 mL/d of 0.78 mg/mL oseltamivir; and (6) group F: virally infected mice living in a damp environment and receiving treatment with 0.2 mL/d of 0.78 mg/mL oseltamivir. Outcome Measures • Real-time quantitative polymerase chain reaction was used to measure the mRNA expression of TLR7, myeloid differentiation primary response gene 88 (MyD88), tumor necrosis factor receptor associated factor 6 (TRAF6), interleukin 1 receptor-associated kinase 4 (IRAK4), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) in the TLR7 signaling pathway and the viral replication level in the lung. Results • The mice began to lose weight after being infected with IAV, especially those mice in groups D and F, where the mice were lost weight more quickly than those in groups C and E. The damages in group F were more serious than for mice in group E. In groups C and D, the mRNA TLR7, MyD88, TRAF6, IRAK4, and NF-κB were upregulated after viral infection (P < .01). After the IAV infection, the expression of TLR7, MyD88, TRAF6, and NF-κB mRNA in group D was higher (P < .01) than in group C. The oseltamivir treatment reduced the mRNA expression in the TLR7 signaling pathways (P < .01), both in the damp environment and normal environment. The expression of mRNA in the TLR7 signaling pathways was lower in group F than in group E (P < .01). Conclusions • The study suggests that dampness can promote the IAV infection and worsen its prognosis by upregulating the TLR7 signaling pathway.

TLR4 contributes to intestinal hyperpermeability in alcoholic liver disease / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To determine whether Toll-like receptor 4 (TLR4) is involved in development of gut leakiness in alcoholic steatohepatitis using an in vivo animal model and an in vitro cell culture system.</p><p><b>METHODS</b>Mice were fed an alcohol (ethanol group, EtOH) or isocaloric liquid diet (control group, Ctrl). Successful establishment of the alcoholic steatohepatitis model was assessed at week 6 by measuring serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities and evaluating the liver pathology using hematoxylin and eosin (HandE) staining of liver tissues. Gut permeability was assessed by measuring serum endotoxin and urine lactulose/mannitol (L/M) levels and evaluating HandE-stained colon tissues. Intestinal and colon tissue expression levels of TLR4 were assessed by immunohistochemistry. Cultured Caco-2 cells were exposed to 25 - 400 mmol/L EtOH and changes in TLR4 were assessed by enzyme-linked immunoassay and in permeability were assessed by intracellular uptake of FD4.</p><p><b>RESULTS</b>The mice in the EtOH group had significantly higher levels of serum ALT (46.5 +/- 6.9 U/L vs. Ctrl: 30.9 +/- 4.4 U/L, P less than 0.01), serum AST (53.3 +/- 7.9 U/L vs. Ctrl: 29.3 +/- 3.8 U/L, P less than 0.01), serum endotoxin (0.33 +/- 0.05 Eu/L vs. Ctrl: 0.27 +/- 0.04 Eu/L, P less than 0.01), and urine L/M (2.59 +/- 0.44% vs. Ctrl: 2.17 +/- 0.31%, P less than 0.05). The mice in the EtOH group also had significantly higher expression levels of TLR4 in intestinal tissues (13.1 +/- 2.0 ng/ml vs. Ctrl: 7.4 +/- 1.2 ng/L, P less than 0.01) and in colonic tissues (18.5 +/- 2.7 ng/ml vs. Ctrl: 9.1 +/- 1.6 ng/ml, P less than 0.01). The intestinal histopathology of the two groups was not different. Immunohistochemical staining of colonic tissues showed brown particles distributed in the endochylema and membrane of the EtOH group, which was almost completely absent in the Ctrl group. EtOH treatment of Caco-2 cells led to a dose-dependent increase in TLR4 expression and in cellular permeability.</p><p><b>CONCLUSION</b>Chronic alcohol exposure induced TLR4 expression and cellular permeability in gut tissues. Activation of TLR4 may be involved in development of gut leakiness in alcoholic liver disease.</p>

Clinical observation on treating severe neonatal diaper rash with hip bath and oxygen blowing / 中国实用护理杂志

Objective This research is to observe the treatment effects of hip bath and oxygen blowing on severe neonatal diaper rash.Methods 289 neonates with severe diaper rash were randomly divided into three groups.91 cases in the flat tube group,102 cases in the round tube group and 96 cases in the control group.Three groups of neonates were cleaned on the hips and perineuma after poops and then dried with wet tissues and Mupirocin Ointment.The control group was treated with the above-mentioned method.The oxygen blowing groups were treated with hip bath of 1:5000 chameleon solution twice a day.Blowing the hips with oxygen five minutes every time after hip bath.The method of blowing oxygen was that oxygen humidifying containers as normal oxygen aspiration facilities was not filled with water,whose oxygen flowing volume standed at 10 L/min and whose tube blew at the afflicted parts until being dry.The oxygen blower held the oxygen exit and blowed at the afflicted parts in the round tube group and the oxygen blower flattened the oxygen exit and blew at the afflicted parts in the fiat tube group.The treatment effects will be compared among the three groups four days later.Results The cure period of the round tube group was obviously shorter than that of the control group,and the cure period of the fiat tube group was remarkably shorter than that of the round tube group.The total effective rate in the round tube group was obviously higher than that of the control group and the total effective rate in the fiat tube group was obviously higher than that in the round tube group.The difference had a statistical significance.Conclusions The treatment effects for the severe neonatal diaper rash with hip bath and oxygen blowing are remarkable and the oxygen blowing effects with fiat tubes are better than those with round tubes.