Gas gangrene is an emergency condition, which usually develops after injuries or surgery. This study was designed to investigate clinical characteristics, appropriate therapy, and effective control of nosocomial cross-infection of gas gangrene in Wenchuan earthquake victims. Data on diagnosis, treatment, and prevention of confirmed, suspected, or highly suspected gas gangrene were collected. Sixty-seven (2.41%) cases of suspected gas gangrene were found, in which 32 cases were highly suspected of gas gangrene and 5 cases were confirmed by culture of Clostridium perfringens. Thereof, injury sites were mainly located on the limbs, and typical indications, including crepitation, severe localized pain, swelling, wound discoloration, dark red or black necrotic muscle, foul smell as well as different degrees of systemic toxic performance were common among them. After hospitalization, all patients were isolated and had surgery quickly to remove dead, damaged or infected tissue. The wounds were also exposed for drainage and washed or padded with 3% liquid hydrogen peroxide for disinfection before all diagnostic test results were available. Additionally, high doses of antibiotics (mainly penicillin) were given for the prevention of infection, and supportive therapy was applied for corresponding symptoms control. Among those cases, no fatality was reported. In summary, in post-disaster emergency relief, the diagnosis of gas gangrene should be primarily based on clinical manifestations; while patient isolation, wound debridement and disinfection, as well as antibiotics treatment, is the main measures for proper treatment and control of nosocomial infection for gas gangrene.

Gas gangrene is an emergency condition,which usually develops after injuries or surgery.This study was designed to investigate clinical characteristics,appropriate therapy,and effective control of nosocomial cross-infection of gas gangrene in Wenchuan earthquake victims.Data on diagnosis,treatment,and prevention of confirmed,suspected,or highly suspected gas gangrene were collected.Sixty-seven (2.41％) cases of suspected gas gangrene were found,in which 32 cases were highly suspected of gas gangrene and 5 cases were confirmed by culture of Clostridium perfringens.Thereof,injury sites were mainly located on the limbs,and typical indications,including crepitation,severe localized pain,swelling,wound discoloration,dark red or black necrotic muscle,foul smell as well as different degrees of systemic toxic performance were common among them.After hospitalization,all patients were isolated and had surgery quickly to remove dead,damaged or infected tissue.The wounds were also exposed for drainage and washed or padded with 3％ liquid hydrogen peroxide for disinfection before all diagnostic test results were available.Additionally,high doses of antibiotics (mainly penicillin) were given for the prevention of infection,and supportive therapy was applied for corresponding symptoms control.Among those cases,no fatality was reported.In summary,in post-disaster emergency relief,the diagnosis of gas gangrene should be primarily based on clinical manifestations; while patient isolation,wound debridement and disinfection,as well as antibiotics treatment,is the main measures for proper treatment and control of nosocomial infection for gas gangrene.

Objective : To analyze the effects of transglutaminase 2(TGM2) gene interference on the malignant proliferation and movement of lung cancer cells . Methods : A549 cells in logarithmic growth phase were divided into control group , shRNA⁃NC group and TGM2⁃shRNA1 group . After transfection , expression levels of TGM2 mRNA A549 cells in logarithmic growth phase were divided into control group , shRNA⁃NC group and TGM2⁃shRNA1 group . After transfection , expression levels of TGM2 mRNA clone formation assay . The proliferation activity of cells was detected by CCK⁃8 . The apoptosis rate was detected by flow cytometer. The invasion of cells was detected by Transwell . The number of tubule formation in each group was observed under microscope . The expression of E ⁃cadherin (E⁃cad) , N ⁃cadherin (N⁃cad) , fibronectin (FN) and vascular endothelial growth factor (VEGF) in each group was detected by Western blot . Results : Compared with shRNA⁃NC group , the mRNA level and protein expression of TGM2 in TGM2⁃shRNA1 group were decreased (P <0. 05) , and the rate of clone formation , proliferation activity , number of invasive cells and number of tubules formation were decreased ( P < 0. 05) . The apoptosis rate and the expression of E ⁃cad protein were increased ( P <0. 05) , while the expression of N ⁃cad , FN and VEGF protein were decreased (P < 0. 05) . Conclusion TGM2 gene silencing can inhibit the expression of VEGF protein , inhibit the malignant proliferation and invasion of A549 cells , and promote apoptosis .

Objective : To analyze the effects of miR⁃346 on alleviating cardiac function damage and oxidative stress in rats undergoing myocardial ischemia/reperfusion (I/R) . Methods : A total of 48 rats were randomly divided into control group , I/R group , I/R + agomiR⁃NC group and I/R + agomiR⁃346 group. I/R model was replicated by the ligation of left anterior descending coronary artery. The recombinant adeno⁃associated virus miR⁃346 was injected through the tail vein for overexpression intervention. After 120 minutes of reperfusion , heart rate (HR) , left ventricular ejection fraction (LVEF) , fractional shortening (FS) and left ventricular wall thickness (LVWT) , levels of serum creatine kinase MB (CK⁃MB) , myoglobin (Mb) , lactate dehydrogenase (LDH) and cardiac troponin I (cTnI) , and levels of superoxide dismutase ( SOD) , glutathion peroxidase ( GSH⁃Px ) and malondialdehyde (MDA) in myocardial tissues were detected. The apoptosis of myocardial tissue cells was detected by TUNEL staining. The expression of B⁃cell lymphoma/leukemia⁃2 (Bcl⁃2) gene , Bcl⁃associated x protein (Bax) , cysteine protease 3 ( Cas⁃3 ) and Cas⁃9 in myocardial tissues was detected by Western blot. Results : HR , LVEF , FS and LVWT in I/R group were lower than those in control group , the levels of serum CK⁃MB , LDH , Mb and cTnI were higher than those in control group , the expression of MDA , Bax/Bcl⁃2 , cleaved Cas⁃3/Cas⁃3 and cleaved Cas⁃9/Cas⁃9 proteins in myocardial tissues was higher than that in control group , the levels of SOD and GSH⁃px were lower than those in control group , and the apoptosis rate of myocardial tissue cells was higher than that in control group (P < 0. 05) . HR , LVEF , FS and LVWT in I/R + agomiR⁃346 group were higher than those in I/R + agomiR⁃NC group , the levels of serum CK⁃MB , LDH , Mb and cTnI were lower than those in I/R + agomiR⁃NC group , the expression of MDA , Bax/Bcl⁃2 , cleaved Cas⁃3/Cas⁃3 and cleaved Cas⁃9/Cas⁃9 proteins in myocardial tissues was lower than that in I/R + agomiR⁃NC group , the levels of SOD and GSH⁃px were higher than those in I/R + agomiR⁃NC group , and the apoptosis rate of myocardial tissue cells was lower than that in I/R + agomiR⁃NC group ( P <0. 05) . Conclusion The miR⁃346 overexpression can reduce oxidative stress level in I/R rats , alleviate myocardial tissue damage , and improve cardiac function.