AIM:To investigate the effects of down-regulated miR-9 expression on the proliferation , invasion and migration of nasopharyngeal carcinoma (NPC) cells.METHODS:Human NPC CNE1 and CNE2 cells were transfect-ed with the inhibitor of miR-9 by Lipofectamine to down-regulate the expression of miR-9, and the cells transfected with an inhibitor control were also set up .The cell proliferation and cell cycle were evaluated by CCK-8 assay and flow cytometry . The cell invasion and migration abilities were detected by Transwell invasion and wound -healing assays .Immunoblotting was applied to analyze the levels of the proteins .RESULTS:Compared with control group , inhibition of miR-9 expression in the NPC cells by transfection of the miR-9 inhibitor significantly decreased the proliferation ability (P<0.05).The per-centages of the cells in G 0/G1 phase [ CNE2: ( 57.96 ±1.39 )% vs ( 47.93 ±1.76 )%, P<0.05; CNE1: ( 51.24 ± 0.88)%vs (48.29 ±0.39)%, P<0.05] were significantly increased.The migration distances [CNE2: (186.50 ± 7.94)μm vs (247.56 ±15.56)μm, P<0.05;CNE1:(139.06 ±16.73)μm vs (230.66 ±14.27)μm, P<0.01] and the invasion ability of the CNE2 cells (43.00 ±3.17 vs 65.80 ±5.20, P<0.01) were also significantly inhibited .Moreo-ver, the tumor cells transfected with the inhibitors produced lower β-catenin.CONCLUSION:Inhibition of miR-9 expres-sion suppresses the proliferation , invasion and migration of nasopharyngeal carcinoma cells .

Aim To study the mechanism of DXM and NAC inhibiting the expression of IL-8 and ICAM-1 in A549 cells. Methods The expression of IL-8 and ICAM-1 was detected by ELISA and flow cytometry re-spectively; the expression of GR,HDAC,AP-1,NF-κB was detected by Western blot, while the activity of HDAC was detected by spectrophotometry. ResultsThe increasing expression of IL-8 and ICAM-1 induced by TNF-α could be inhibited by DXM and NAC in A549 cells. DXM could inhibit the transcribed activa-tion of AP-1,NF-κB, and the expression of HDAC and its activity induced by TNF-α and LPS; NAC only in-hibited the transcribed activation of NF-κB, while it had no affection on the transcribed activation of AP-1 and the expression of HDAC and its activity. Conclu-sions DXM and NAC both have the anti-inflammatory effect. DXM plays the role of anti-inflammation through increasing the expression and activation of HDAC, in-hibiting the transcribed activation of AP-1 and NF-κB, while NAC has no effect on the expression and activa-tion of HDAC, which shows that NAC does not exert anti-inflammatory effect through acetylation signal.

OBJECTIVETo study the effect of Xinnao Shutong capsule (XNST) on energy metabolism dysfunction, free radical injury and inflammatic factors in the course of acute cerebral ischemic damage, and try to reveal the mechanism of the protection against ischemia.

METHOD60 male Wistar rats weighing 280 - 320 g were randomly divided into five groups: normal, sham operation, model, XNST treatment( XNST-T) , and Western medicine treatment (WM-T) group. Acute multi-infarct model in rats was induced by injecting the embolus of blood powder through the right external carotid artery (ECA) into the internal carotid artery (ICA). At 72 hours after ischemia, morphologic change and the express of tumor necrosis factor-alpha (TNF-alpha) and interleukin -1beta ( IL-1beta) in hippocampus CAl section and cortex were observed, biochemical criterions including the activity of Na+ -K+ -ATPase, lactate dehydrogenase (LDH), superoxide dismutase (SOD), and the content of malondialdehyde (MDA) in hippocampus were examined.

RESULTThe morphologic change of hippocampus and cortex in both XNST-T and WM-T groups was milder than that in model group. The activity of Na+ -K+ -ATPase, LDH and SOD in hippocampus were all significantly decreased in model group (P <0. 01), and elevated in XNST group (P <0. 01) as well as in WM-T group (P <0. 01). The content of MDA in hippocampus was significantly increased in model group (P <0. 05), and was reduced in XNST group (P <0. 05) as well as in WM-T group (P <0. 01).

CONCLUSIONThe results reveal that XNST has the protective effect against cerebral ischemic injury. And its possible mechanism is that XNST can prevent the upper pathological process.

Animals ; Brain Infarction ; complications ; Brain Ischemia ; etiology ; metabolism ; prevention & control ; Capsules ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; Hippocampus ; drug effects ; metabolism ; pathology ; L-Lactate Dehydrogenase ; metabolism ; Male ; Malondialdehyde ; metabolism ; Neuroprotective Agents ; isolation & purification ; pharmacology ; Plants, Medicinal ; chemistry ; Random Allocation ; Rats ; Rats, Wistar ; Saponins ; isolation & purification ; pharmacology ; Sodium-Potassium-Exchanging ATPase ; metabolism ; Superoxide Dismutase ; metabolism ; Tribulus ; chemistry

OBJECTIVETo investigate the effects of down-regulated miR-9 expression on ultraviolet rays (UV)-induced reactive oxygen species (ROS) damage in nasopharyngeal carcinoma (NPC) cells.

METHODSThe NPC cells were transfected with inhibitors of miR-9 by lipofectamine to decrease the expression of miR-9, and the cells transfected with inhibitor control as the control. ROS levels following UV exposure were examined with DCF-DA method and the concentration of glutathione was analyzed via the benzoic acid method; DNA damage and apoptosis also were evaluated.

RESULTSThere was significant difference in ROS levels between miR-9 expression-inhibited cells and control cells (26 895 ± 218 vs 15 765 ± 927, t = 39.754, P < 0.001), and also there were significant differences in DNA damage rates (28.0% ± 10.0% vs 23.6% ± 9.2%) and in apoptosis rates (8.0% ± 0.9% vs 4.5% ± 0.8%) following UV exposure between two groups of cells. The miR-9 expression-inhibited cells showed lower level (1.87 ± 0.15) µmol/L of glutathione compared with the control cells (9.85 ± 0.15) µmol/L (t = -48.832, P < 0.001).

CONCLUSIONInhibition of miR-9 expression promoted UV-induced ROS damage in nasopharyngeal carcinoma cells.

Apoptosis ; Carcinoma ; Cell Line, Tumor ; DNA Damage ; Humans ; MicroRNAs ; metabolism ; Nasopharyngeal Neoplasms ; metabolism ; Reactive Oxygen Species ; metabolism ; Transfection

Objective:To establish ICU transitional care program.Methods:Delphi method was used to interview 25 experts and two rounds of mailing interview were taken.Results:The returning rates of two rounds of mailing were both 100%. The authority coefficient of the experts was 0.808, and coordination coefficient of experts ′ opinion was 0.179. The program included 7 first level indexes, 8 second level indexes, and 40 third level indexes, including purpose, nursing object, implementer, time point, place, nursing content and evaluation indicators. According to different time points, it was divided to three phases: before, during, and after transfer from the ICU to a general ward. Conclusions:The program developed in this study is scientific and reliable, which can provide some reference for the practice and research of ICU transitional care in China.

Hemangioendothelioma, Epithelioid ; Humans ; Liver Neoplasms ; Male ; Middle Aged

OBJECTIVETo investigate the role of Mcl-1 gene in resistance of all-trans retinoic acid (ATRA) of leukemia cells.

METHODSLong-term, intermittent and repetitive exposure of HL-60 cells to ATRA was used to establish a multidrug-resistance cell line (HL-60/ATRA). HL-60/ATRA cells were transfected with Mcl-1 small interference RNA (siRNA) by Lipofectamine 2000. Western blot was used to detect the expression of Mcl-1. The proliferation, apoptosis and differentiation were evaluated by MTT assay, in situ nick end-labeling (TUNEL) and NBT assay, respectively.

RESULTSThe HL-60/ATRA could keep its undifferentiated and proliferative status to a high concentration of ATRA (100 nmol/L) with highly expressed Mcl-1 protein (relative grey scale 0.624 +/- 0.127). Mcl-1 gene knockdown by siRNA (relative grey scale 0.267 +/- 0.086) could reverse the resistance of ATRA of HL-60/ATRA by inhibiting proliferation, and inducing differentiation and apoptosis [apoptosis rate (18.5 +/- 4.5)%].

CONCLUSIONMcl-1 gene might be involved in ATRA resistance in HL-60 cells and inhibiting its expression could be a new approach to ATRA resistance reversion.

Apoptosis ; drug effects ; genetics ; Cell Differentiation ; drug effects ; genetics ; Cell Proliferation ; drug effects ; Drug Resistance, Neoplasm ; genetics ; HL-60 Cells ; drug effects ; metabolism ; Humans ; Proto-Oncogene Proteins c-bcl-2 ; genetics ; metabolism ; RNA, Small Interfering ; Tretinoin ; pharmacology

OBJECTIVETo explore the role of sonic hedgehog (Shh) pathway in regulating the proliferation, migration and differentiation of hemangioblasts derived from aorta-gonad-mesonephros (AGM).

METHODSThe hemangioblasts were isolated from AGM region of 11-day postcoitum (dpc) murine embryos by using the immuno-magnetic with CD34 and Flk1 monoclonal antibodies. The phenotypic analysis of hemangioblasts and AGM-derived stromal cells were detected by flow cytometry. The secretion of Shh was examined by immunohistochemical staining. The roles of Shh in regulating the proliferation, migration and differentiation of hemangioblasts in the transwell non-contact coculture system with AGM-derived stromal cells were observed by adding exogenous Shh N-Terminus and its antibody.

RESULTSThe protein of Shh was highly expressed on AGM-derived stromal cells. The proliferation of hemangioblasts was promoted when co-cultured with AGM-derived stromal cells, and the effects of the latter could be blocked by antibody of Shh. The proliferation of hemangioblasts was strengthened further and kept for a long time without differentiation and apoptosis when exogenous Shh N-Terminus was added into the transwell non-contact co-culture system with AGM-derived stromal cells. When exogenous Shh N-Terminus was added into the cultural supernatant of hemangioblasts without AGM-derived stromal cells, the hemangioblasts were observed to be induced to apoptosis or differentiation after a short time of proliferation. Furthermore, the ability of migration could be promoted in the co-cultured hemangioblasts by adding exogenous Shh N-Terminus.

CONCLUSIONShh pathway probably involves in the regulation of the proliferation, differentiation, apoptosis and migration of hemangioblasts, and is regulated by the AGM microenvironment.

Adrenal Glands ; cytology ; Animals ; Aorta ; cytology ; Cell Differentiation ; Cell Movement ; Cell Proliferation ; Cells, Cultured ; Embryo, Mammalian ; cytology ; Hedgehog Proteins ; metabolism ; Hemangioblasts ; metabolism ; physiology ; Mesonephros ; cytology ; Mice ; Mice, Inbred BALB C ; Signal Transduction

Animals ; Carbon Tetrachloride ; adverse effects ; Chemical and Drug Induced Liver Injury, Chronic ; prevention & control ; Chronic Disease ; Granulocyte Colony-Stimulating Factor ; therapeutic use ; Mice ; Mice, Inbred BALB C

Objective To observe any curative effect of applying comprehensive pulmonary rehabilitation in moderate and severe cases of chronic obstructive pulmonary disease (COPD).Methods A total of 135 persons hospitalized with moderate or severe COPD were randomly divided into a rehabilitation group of 75 and acontrol group of 60.Both groups were given routine treatment,while the rehabilitation group was additionally provided with a comprehensive pulmonary rehabilitation regimen,including health education,exercise training,respiratory function training,respiratory muscle training,psychological support and nutritional intervention for six months.Before and after the treatment,both groups were evaluated using their walking distance within 6 minutes (6MWD),an anhelation index,a COPD assessment test (CAT),the Beck anxiety and depression scale,a nutritional assessment and indexes of pulmonary function and blood gases.Results After the intervention the average 6 MWD,anhelation index,CAT score,Beck anxiety and depression scores,forced expiratory volume,forced vital capacity and PaO2 of the rehabilitation group were all significantly better than before the treatment and better than those of the control group.Conclusion For moderate and severe COPD patients,comprehensive pulmonary rehabilitation effectively strengthens their moving ability,pulmonary function and arterial partial pressure of oxygen,while relieving anhelation,anxiety and depression.