Accidents, Occupational ; prevention & control ; Emergency Medical Services ; organization & administration ; Humans ; Occupational Exposure ; prevention & control ; Occupational Health ; Poisoning ; prevention & control ; Risk Assessment

Adipates ; analysis ; Air Pollutants, Occupational ; analysis ; Esters ; analysis ; Gas Chromatography-Mass Spectrometry ; methods ; Phthalic Acids ; analysis ; Workplace

Objective To observe the protective effect of?-asarone,the active components from Rhizoma Acori Tarinowii,on human umbilical venous endothelial cell strain ECV304 injury induced by oxidized low-density lipoprotein(ox-LDL)and to investigate its influence on proliferation of vascular smooth muscle cells(VSMC). Methods The well-grown ECV304 cells were randomized into 5 groups:normal group,control group,high-, middle-and low-dose?-asarone groups.Except the normal group,ECV in the other groups were co-cultured with ox-LDL 25?g/mL,and the?-asarone groups were additionally with?-asarone 30,15 and 7.5?g/mL added respectively.Flow cytometry was used to detect the cell apoptotic rate and the mitochondrial membrane potential (MMP)of ECV304 as well as the proliferation index and the DNA content in different cell phases of VSMC. Results In the model group,the apoptotic rate of ECV was increased,MMP was decreased,and VSMC proliferation was promoted(P

Different from the traditional teaching method, PBL (Problem-Based Learning) teaching mode is emphasized to foster the students' skills in spontaneous study and problem solving and the analyzing and comprehensive thinking ability. The authors believe that in the application of the PBL teaching method, the teachers' functions should be stressed on how to select the initial moment, provide the topics, excite the interesting points, search information,make comments and evaluate the students' ability, i.e. to offer fish and teach how to catch fish as well.

Adult ; Fever ; etiology ; Gastrointestinal Hemorrhage ; etiology ; Humans ; Male ; Polyps ; complications ; Stomach Diseases ; complications

OBJECTIVETo investigate the effects of the over-expression of hypoxia-inducible factor-1alpha (HIF-1alpha) on the epithelial-mesenchymal transition (EMT) and invasive potency of LNCaP cells in vitro and in vivo.

METHODSWe cultured LNCaP cells stably expressing HIF-1alpha (LNCaP/HIF-1alpha) and LNCaP cells, identified the over-expression of HIF-1alpha, determined the proliferation of the two cell lines by MTT assay and the level of PSA in the supernatant of culture medium, and detected the anchorage independent growth by soft-agar colony formation assay. A subcutaneous tumor model was established in nude mice by injecting LNCaP/HIF-1alpha and LNCaP cells followed by observation of the tumor growth. Tumor specimens were obtained for immunohistochemistry.

RESULTSThe over-expression of HIF-1alpha was confirmed in the LNCaP/HIF-1alpha cells by immunofluorescence staining and Western blotting. The level of PSA was obviously decreased in LNCaP/HIF-1alpha as compared with that in LNCaP cells. MTT assay identified the increased proliferation of LNCaP/HIF-1alpha cells. The cell colony forming ability of the LNCaP cells was significantly lower than that of the LNCaP/HIF-1alpha cells. The rate of tumorigenesis was increased and its time shortened in the LNCaP/HIF-1alpha group. Immunohistochemistry revealed an up-regulated expression of vimentin and a down-regulated expression of E-cadherin in the tumor specimens.

CONCLUSIONThe overexpression of HIF-1alpha can up-regulate the expression of vimentin and down-regulate the expression of E-cadherin, which may enhance the invasive potency of LNCaP cells by inducing EMT.

Animals ; Cell Hypoxia ; Cell Line, Tumor ; Epithelial-Mesenchymal Transition ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Male ; Mice ; Mice, Nude ; Prostatic Neoplasms ; metabolism ; pathology

Objective: To observe the effects of electroacupuncutre at Tianzhu point on the expressions of bcl-2 and bcl-XL in the degenerative cervical intervertebral disc of rats. Methods: Forty SD male rats were randomly divided into 4 groups, sham surgery group, model group, Western medicine group and electroacupuncture group, there were 10 rats in each group. Except for rats in the sham surgery group, rats in the other groups were made to be of cervical intervertebral disc degeneration by unbalanced dynamic and static forces. Rats in the electroacupunture group were treated with electroacupuncture at Tianzhu (BL 10) and Dazhu (BL 11) points, while rats in the Western medicine group with Fenbid, and rats in the model group were not treated. After 30-day treatments, the expressions of bcl-2 and bci-XL were observed with immunohisto-chemical method in the cervical intervertebral disc. Results: The expression of bcl-2 was higher in the electroacupuncture, sham surgery, and western medicine groups than that in the model group (P<0.01), whereas, there was no difference among these three groups. The expression of bcl-XL in the electroacupuncture group was lower than that in the sham surgery group (P<0.01), and higher than those in the Western medicine group and model group (P<0.01). Conclusion: Electroacupuncture treatment can enhance the expressions of bcl-2 and bcl-XL, which may be the mechanism of delaying the cell apoptosis in the intervertebral disc to treat diseases.

Carcinoma, Non-Small-Cell Lung ; genetics ; Exons ; genetics ; Genes, erbB-1 ; genetics ; Humans ; Lung Neoplasms ; pathology

OBJECTIVETo study the effect of Zhibai Dihuang Pill (ZBDHP) on urokinase-type plasminogen activator (uPA) and sperm quality in ureaplasma urealyticum (Uu) infection infertile patients.

METHODSRecruited were 80 infertility patients with Uu infection at Andriatrics Clinics and Department of Reproduction, including 130 cases of positive Uu semen and 50 cases of negative Uu semen. Patients with positive Uu semen were randomly assigned to the observation group (72 cases) and the control group (58 cases) according to the visit sequence. All patients took antibiotics for 2 weeks. Patients in the observation group additionally took ZBDHP, 6 g each time, twice daily. Those in the control group additionally took Vit E (100 mg each time, twice per day) and ATP (40 mg each time, twice per day). The therapeutic course for all was 90 days. Semen parameters and uPA contents of the sperm membrane were detected and comparatively analyzed.

RESULTSThe sperm membrane uPA content, the sperm motility, the sperm viability, and the percentage of normal morphology sperm in Uu positive infected patients were lower than those in Uu negative infected patients with statistical difference (P < 0.05), but with no significant difference in the sperm density between the two groups (P > 0.05). There was no statistical difference in pre-treatment sperm membrane uPA contents and sperm parameters between the two groups (P > 0.05). Compared with before treatment in the same group, the sperm membrane uPA content, the sperm motility, the sperm viability, and the percentage of normal morphology sperm obviously increased in the two groups with statistical difference (P < 0.05). After treatment, the sperm membrane uPA content increased more obviously in the observation group, with statistical difference when compared with the control group (P < 0.05).

CONCLUSIONSInfection with Uu leads to decreased uPA content of sperm membrance and the sperm motility. ZBDHP could effectively treat Uu infected infertility possibly through fighting against Uu damaged sperm membrane and make the sperm membrane uPA content return to normal, and elevate the fertilizability of sperms.

Anti-Bacterial Agents ; administration & dosage ; pharmacology ; therapeutic use ; Communicable Diseases ; Drugs, Chinese Herbal ; administration & dosage ; pharmacology ; therapeutic use ; Humans ; Infertility ; Infertility, Male ; Male ; Semen ; Semen Analysis ; Sperm Count ; Sperm Motility ; Spermatozoa ; Ureaplasma Infections ; drug therapy ; Ureaplasma urealyticum ; drug effects ; Urokinase-Type Plasminogen Activator ; metabolism

OBJECTIVETo explore the bone marrow feature of hemopoietic system injured by benzene through analyzing 56 benzolism cases.

METHODSThe 56 benzolism cases were divided into mild poisoning group, midrange poisoning group, aplastic anemia group, pancytopenia group and leukemia group. All cases progressed bone marrow aspiration and smear, and counted hundred karyocytes by Wright-Giemsa tinct bone marrow smear to classification and observe the cells' feature.

RESULTSThe megakaryocytes and the extent of bone marrow hyperplasia were decreased by turns of mild poisoning group, midrange poisoning group and aplastic anemia group. The archaeocytes and juvenile cells proliferation in mild poisoning group and midrange poisoning group were inhibited and occurred cell paramorphia which related to intoxication. Comparing with the other groups and normal reference value, the pancytopenia group's percentage of bone marrow cells in karyocytes was significantly decreased (P < 0.01, P < 0.05) and the leukemia group's percentage of bone marrow cells in karyocytes was significantly increased (P < 0.01). The proportion of cell paramorphia and nucleus malformation of granulocytes and red blood cells in pancytopenia group and leukemia group were increased, especially in leukemia group.

CONCLUSIONWe saw the inhibition of archaeocytes and juvenile cells proliferation and some cell paramorphia appearances in mild poisoning and midrange poisoning cases of chronic benzolism. The abnormality changes which can be seen in bone marrow of severe benzolism cases were corresponding with the clinical classification.

Adult ; Anemia ; etiology ; pathology ; Anemia, Aplastic ; etiology ; pathology ; Benzene ; poisoning ; Bone Marrow ; pathology ; Bone Marrow Cells ; cytology ; Bone Marrow Examination ; Female ; Humans ; Leukemia ; etiology ; pathology ; Male ; Middle Aged