302 Military Hospital of China
302 Military Hospital of China
Xu Z.-R.,Zhejiang University |
Hu L.,302 Military Hospital of China |
Cheng L.-F.,Zhejiang University |
Qian Y.,Zhejiang University |
Yang Y.-M.,Zhejiang University
European Journal of Pharmacology | Year: 2010
Oxidative stress is proved to be harmful to the vascular endothelial cells which are important in preventing the formation and progression of atheromatous plaque. This study was designed to investigate the protective effect and potential mechanisms of dihydrotestosterone (DHT) against H2O2-induced apoptosis of human umbilical vein endothelial cells (ECV-304). ECV-304 cells were pretreated with different concentrations of DHT (0.01, 0.1 and 1μM) for 2h, followed by exposure to 100μM H2O2 for 18h. 3-(4,5-dimethylthiazol-2yl-)-2,5-diphenyl tetrazolium bromide (MTT) assay was used to evaluate cell viability. To detect apoptosis, the cells were assessed by morphologic examination and Annexin V-propidium iodide double staining with flow cytometry. Finally, the expression of caspase-3, caspase-9 and phospho p38 MAPK was assayed by Western blot to investigate the possible molecular mechanisms. We found that H2O2 treatment for 18h significantly decrease the viability of ECV-304 cells characterized by a high percentage of apoptotic cells. DHT could antagonize the apoptosis inducing effect of H2O2 in a dose-dependent manner. Consistently, DHT also significantly inhibit the expression of caspase-3, caspase-9 and phospho p38 MAPK induced by H2O2. In summary, pretreatment with DHT can inhibit apoptosis of ECV-304 cells induced by H2O2. The protective effect of DHT was associated with the inhibition of caspase-3, caspase-9 and phospho p38 MAPK expression. © 2010 Elsevier B.V.
Fu Z.,Academy of Military Medical science |
Guo J.,Academy of Military Medical science |
Jing L.,Academy of Military Medical science |
Li R.,302 Military Hospital of China |
And 2 more authors.
Toxicology in Vitro | Year: 2010
The clinical use of doxorubicin (Dox), a potent anticancer drug, is limited by its concurrent dose-dependent cardiotoxicity. We previously found that metallothionein-I/II (MT-I/II) null mice are more vulnerable to Dox-induced cardiomyopathy, but it is unknown whether depletion of MT would sensitize cardiomyocytes to Dox toxicity in vitro since the protective effect of MT still remains controversial. In the present study, a primary culture system of cardiomyocytes from neonatal MT-I/II null (MT-/-) and corresponding wild type (MT+/+) mice was established to unequivocally determine the effect of MT deficiency on Dox-induced toxicity. MT concentrations in the MT-/- cardiomyocytes were about 2.5-fold lower than those in MT+/+ cardiomyocytes. MT-/- cardiomyocytes were more sensitive to Dox-induced cytotoxicity than MT+/+ cardiomyocytes as measured by morphological alterations, lactate dehydrogenase leakage, cell viability, and apoptosis. Dox time- and concentration-dependently increased reactive oxygen species (ROS) formation in MT+/+ cardiomyocytes, and this effect was exaggerated in MT-/- cardiomyocytes. Antioxidant N-acetylcysteine (NAC) and glutathione (GSH) significantly rescued MT+/+ but not MT-/-cardiomyocytes from Dox-induced cell death and ROS generation. These findings suggest that basal MT provide protection against Dox-induced toxicity in cardiomyocytes, particularly highlight the important role of MT as a cellular antioxidant on scavenging ROS. © 2010 Elsevier Ltd.
Zhu Y.,Beijing Mentougou District Hospital |
Liu H.,Beijing University of Chinese Medicine |
Zhang M.,302 Military Hospital of China |
Guo G.L.,Rutgers University
Acta Pharmaceutica Sinica B | Year: 2016
The prevalence of nonalcoholic fatty liver disease (NAFLD) worldwide has increased at an alarming rate, which will likely result in enormous medical and economic burden. NAFLD presents as a spectrum of liver diseases ranging from simple steatosis, nonalcoholic steatohepatitis (NASH), fibrosis, cirrhosis, and even to hepatocellular carcinoma (HCC). A comprehensive understanding of the mechanism(s) of NAFLD-to-NASH transition remains elusive with various genetic and environmental susceptibility factors possibly involved. An understanding of the mechanism may provide novel strategies in the prevention and treatment to NASH. Abnormal regulation of bile acid homeostasis emerges as an important mechanism to liver injury. The bile acid homeostasis is critically regulated by the farnesoid X receptor (FXR) that is activated by bile acids. FXR has been known to exert tissue-specific effects in regulating bile acid synthesis and transport. Current investigations demonstrate FXR also plays a principle role in regulating lipid metabolism and suppressing inflammation in the liver. Therefore, the future determination of the molecular mechanism by which FXR protects the liver from developing NAFLD may shed light to the prevention and treatment of NAFLD. © 2016 Chinese Pharmaceutical Association and Institute of Materia Medica, Chinese Academy of Medical Sciences
Xu Z.-r.,First Affiliated Hospital |
Yang Y.-m.,First Affiliated Hospital |
Gui Q.-f.,First Affiliated Hospital |
Zhang L.-n.,First Affiliated Hospital |
Hu L.,302 Military Hospital of China
Protein Expression and Purification | Year: 2010
Lumbrokinase (LK) is an important fibrinolytic enzyme derived from earthworms. It has been found that LK is composed of a group of isoenzymes. To construct and express the mature peptide of LK PI239 in Escherichia coli, we amplified and optimized the gene of LK which was then cloned into the prokaryotic expression vector pET-22b(-). The recombinant LK (rLK) protein was expressed as inclusion bodies and we have developed a purification process of rLK from these inclusion bodies. A step-down urea concentration strategy was applied to the rLK renaturation process. The purified and renatured rLK apparently ameliorated the conditions of the model thrombosis rats used, and may be developed into a therapeutic agent for thrombotic-associated diseases. © 2009 Elsevier Inc. All rights reserved.
Sun Y.,Tsinghua University |
Huang H.,Tsinghua University |
Sun Y.,302 Military Hospital of China |
Wang C.,Tsinghua University |
And 4 more authors.
Environmental Pollution | Year: 2013
The long-term ecological risk of micropollutants, especially endocrine disrupting chemicals (EDCs) has threatened reclaimed water quality. In this study, estrogenic activity and ecological risk of eight typical estrogenic EDCs in effluents from sewage plants were evaluated. The estrogenic activity analysis showed that steroidal estrogens had the highest estrogenic activity (ranged from 10-1 to 103 ng-E2/L), phenolic compounds showed weaker estrogenic activity (mainly ranged from 10-3 to 10 ng-E2/L), and phthalate esters were negligible. The ecological risk of the estrogenic EDCs which was characterized by risk quotient ranged from 10-4 to 10 3, with an order in descending: steroids estrogens, phenolic compounds and phthalate esters. The eight estrogenic EDCs were scored and sorted based on the comparison of the estrogenic activity and the ecological risk, suggesting that 17α-ethynylestradiol (EE2), estrone (E1) and estradiol (E2) should be the priority EDCs to control in municipal sewage plants. © 2013 Elsevier Ltd. All rights reserved.
Fan L.,PLA Fourth Military Medical University |
Cheng C.,PLA Fourth Military Medical University |
Qiao Y.,PLA Fourth Military Medical University |
Li F.,PLA Fourth Military Medical University |
And 3 more authors.
PLoS ONE | Year: 2013
Ideal wound dressing materials should create a good healing environment, with immediate hemostatic effects and antimicrobial activity. In this study, chitosan/konjac glucomannan (CS/KGM) films embedded with gentamicin-loaded poly(dex-GMA/AAc) nanoparticles (giving GNP-CS/KGM films) were prepared as novel wound dressings. The results revealed that the modified CS/KGM films could be used as effective wound dressings and had significant hemostatic effects. With their microporous structure, the films could effectively absorb water from blood and trap blood cells. The gentamicinloaded poly(dex-GMA/AAc) nanoparticles (GNPs) also further promoted blood clotting, with their favorable water uptake capacity. Thus, the GNP-CS/KGM films had wound healing and synergistic effects that helped to stop bleeding from injuries, and also showed good antibiotic abilities by addition of gentamicin to the NPs. These GNPCS/KGM films can be considered as promising novel biodegradable and biocompatible wound dressings with hemostatic capabilities and antibiotic effects for treatment of external bleeding injuries. © 2013 Fan et al.
Xu W.,302 Military Hospital of China
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology | Year: 2012
To find out the more efficient induction method through investigating the expansion efficiencies of HIV-infected patients' Vdelta2 T cells induced by zoledronic acid (Zol) or gammadelta TCR monoclonal antibody (mAb). 38 healthy control subjects (HC group) and 65 HIV infected patients (HIV group) were enrolled in this research. Peripheral blood mononuclear cells (PBMCs) of individuals were stimulated by Zol or gammadelta TCR mAb respectively for 14 days at 2.0 x 10(7) cells/ well, and then gammadelta T cells and Vdelta2 subsets frequencies were measured by flow cytometry (FCM) on 0, 7 and 14 day. The absolute numbers of Vdelta2 T cells were calculated and the Vdelta2 T cell expansion efficiencies by these two methods were compared. The absolute numbers and frequencies of Vdelta2 T cell of HIV groups were lower than those of HC groups significantly on 0 day. After 14 days, the frequencies of Vdelta2 T cell of HIV group and HC group were(17.6 +/- 19.8)% and(64.3 +/- 4.5)% respectively, and the expansion indexes of Vdelta2 T cell were 54 +/- 40 and 74 +/- 29 respectively by induction of gammadelta TCR mAb. However, the frequencies of Vgammadelta2 T cell of HIV group and HC group were (69.6 +/- 21.2)% and (97.3 +/- 1.7)% respectively, and the Vgammadelta2 T cell expansion indexes were 538 +/- 11 and 5984 +/- 721 respectively by induction of Zol. Zol could induce the vast expansion of Vgammadelta2 T cells of HIV infected patients. The expansion efficiency by Zol was better than that by the gammadelta TCR mAb.
Li W.,Capital Medical University |
Teng G.,302 Military Hospital of China |
Tong H.,Wenzhou Medical College |
Jiao Y.,Capital Medical University |
And 3 more authors.
PLoS ONE | Year: 2014
Background: Epidemics of HFMD are elevated every year globally, especially in mainland China. The disease now presents as an increasing threat to public health worldwide. Methods: Five hundred and seventy-one EV71-infected HFMD patients in Beijing You'an Hospital were grouped by disease severity: Mild (no severe complication) (n = 221), and Severe group (complicated with brainstem encephalitis (BE), and/or pulmonary edema (PE) (n = 350)). Clinical and laboratory findings and levels of 7 serum cytokines were analyzed. Results: Univariate analysis showed that (RR)>26/min (p<0.001), age<4 yo (p = 0.001), GLU>8.3 mmol/L (p = 0.008), CL<98 mmol/L (p = 0.026), and WBC>1.2×109/L (p = 0.040) were associated with severe cases. Results of multivariate analysis indicated five independent risk factors (RR>26/min (p<0.001), Age<4 yo (p<0.001), GLU>8.3 mmol/L (p = 0.011), LYM>40% (p = 0.010), and ALT>40 U/L (p = 0.045)). In addition to single-factor analysis, we further analyzed the use of different combinations of risk factors. "GLU>8.3 and CL<98 and RR>26" (confidence ration (CR) = 100%) is the top indicator, followed by "ALT>40 and LYM>40% and RR>26 and Age<4 yo" (CR = 92.9%). Serum levels of IL-2, IL-4, IL-10, IFNγ, GM-CSF, and TNFα were higher in severe cases than in mild cases. A new evaluation scoring system by scoring each risk factor 1 and independent risk factor 2 was developed for early identification of severe HFMD cases. Conclusions: Five independent risk factors, along with indicative combinations of risk factors, for severe cases were identified, and a scoring system was created to facilitate the use of indicators for early medical intervention. © 2014 Li et al.
Yu L.,302 Military Hospital of China |
Guo X.,302 Military Hospital of China |
Zhang P.,302 Military Hospital of China |
Qi R.,302 Military Hospital of China |
And 2 more authors.
OncoTargets and Therapy | Year: 2014
Aim: To investigate the clinical significance of cyclic adenosine monophosphate-responsive element-binding (CREB) and phosphorylated CREB (pCREB) expression in human hepatocellular carcinoma (HCC). Materials and methods: Immunohistochemistry and Western blot analyses were performed to detect the expression and subcellular localizations of CREB and pCREB proteins in 130 pairs of HCC and adjacent nonneoplastic liver tissues. Results: Both immunohistochemistry and Western blot analyses showed that the expression levels of CREB and pCREB proteins in HCC tissues were significantly higher than those in the adjacent nonneoplastic liver tissues (both P<0.001). In addition, the combined upregulation of CREB and pCREB proteins (CREB-high/pCREB-high) was significantly associated with serum α-fetoprotein (P=0.02), tumor stage (P<0.001), and tumor grade (P=0.01). Moreover, HCC patients with CREB-high/pCREB-high expression showed shortest 5-year disease-free survival and 5-year overall survival (both P<0.001). Furthermore, the multivariate survival analysis found that the combined upregulation of CREB and pCREB proteins may be an independent unfavorable prognostic factor for both 5-year disease-free survival and 5-year overall survival (both P=0.01) in HCC. Conclusion: Our data indicate for the first time that the activation of the CREB protein may be associated with tumor progression in HCC, and may serve as a valuable marker of prognosis for patients with this malignancy. © 2014 Yu et al.
302 Military Hospital Of China | Date: 2011-06-28
A sterility test method includes: selecting strain and culture medium, preparing bacterial cultures, transcribing fingerprint characteristics in thermograms as indices to verify the characteristics, drawing the thermodynamic parameters of the thermogram, determining the positive judgment index and performing sterility test for the samples. A fully-enclosed bacteria collecting ampoule incubator includes bacteria collecting ampoule system, sample and liquid feeding system and peristalsis liquid discharge system. The sample and liquid feeding system is connected with the bacteria collecting ampoule system by the liquid intake tube; and the bacteria collecting ampoule system is connected with the peristalsis liquid discharge system by the liquid drainage tube. The invention is characterized by short inspection time, high sensitivity, high automation and accurate test results on microbial contamination. It can also provide the overall process curve on the growth conditions. Such curve is provided with relatively favorable fingerprint, which enables qualitative analysis on the microbial contamination conditions.