AIM To investigate the effects of tetracycline on the expression of adhesive molecules E selectin and intercellular adhesion molecule 1 (ICAM 1) on human umbilical vein endothelial cells (HUVECs) stimulated by tumor necrosis factor alpha (TNF ?) or lipopolysaccharide (LPS). METHODS HUVECs were activated by TNF ? (0 5～50 ?g?L 1 ) or LPS (0 5～50 mg?L -1 ). Tetracycline (10 -6 ～10 -4 mol?L -1 ) was used to incubate HUVECs for 1 h before stimulation with TNF ? ( 1 ?g?L -1 ) or LPS ( 5 mg?L -1 ) and co incubate HUVECs with TNF ? or LPS for 4 h or 18 h. The expression of adhesive molecules on HUVECs was measured by a cellular enzyme linked immunoabsorbent assay (Cell ELISA) method. RESULTS After stimulation of HUVECs with TNF ? or LPS for 4 h induced E selectin expression, and exposure HUVECs to TNF ? or LPS for 18 h increased constitutive expression of ICAM 1 compared with control group ( P

Objective To explore the feasibility and significance of detecting Cyclin D1 and bcl-2 with flow cytometry in the diagnosis of B-cell lymphoma.Methods 45 patients patients with confirmed hematologic diseases in final diagnosis were collected and recorded 45 cases in detail included in the study.25 healthy persons showing normal results in routine physical examinations and laboratory tests were also selected and matched according to the age and gender.In addition,according to the age and gender matching principle,selected routine physical examination and all tests were within the normal range in 25 healthy persons as a healthy control group.Select the pathologically confirmed Cyclin D1 or bcl-2 positive cases were selected as the positive control group,select and the negative cases as the negative control group.Four-color monoclonal antibodies directly immunofluorescence monoclonal antibody labelinged with immunofluorescence were used to analyze the surface and cytoplasmic antigens,and multi-parameter flow cytometry was used to investigate the peripheral blood Cyclin D1 and bcl-2 subsets in lymphoma patients.Results The normal values of Cyclin D1 MFI and bcl-2 were obtained from the 25 normal volunteers by analyzing the (x)±s values and 95 ％ confidence interval,thus establishing the diagnostic criteria.Compared to the healthy control (0.356±0.159,1.938±0.324),all B-cell lymphoma patients had increased expression in Cyclin D1 (1.824±0.312)and bcl-2 MFI (4.259±0.541) in their peripheral blood,results showing statistical significance (P ＜ 0.01).Patients with different subtypes of lymphoma expressed differing Cyclin D1 MFI.In patients with Hodgkin' s lymphoma,Cyclin D1 MFI (0.386±0.112) was significantly lower than that in the non-Hodgkin' s lymphoma patients (1.623±1.987) (P ＜ 0.01).Further,in non-Hodgkin' s lymphoma patients,mantle cell lymphoma was 100 ％ positive for Cyclin D1,while the remaining subtypes were negative.Patients with different subtypes of lymphoma also showed differences in bcl-2 expression.In the Hodgkin' s lymphoma,bcl-2 (2.045±0.877) was significantly lower than the non-Hodgkin' s lymphoma (4.045±0.499) (P ＜ 0.01).In non-Hodgkin' s lymphoma,T cell lymphoma expressed the lowest,while MCL and FL showed 100 ％ positivity.In patients with positive Cyclin D1 or bcl-2,the mean fluorescence intensity level of Cyclin D1 (before treatment 3.099±0.349; after treatment 1.008±0.279) or bcl-2 (before treatment 7.814± 1.030,after treatment 3.131±0.522) was significantly lowered after treatment (P ＜ 0.01).Conclusion Using the method of flow cytometry for detecting Cyclin D1 and bcl-2 in lymphoma cells is feasible,and it can be applied clinically to evaluate the treatment.

Objective To establish an experimental animal model of acute myocardial infarction (AMI) in the swine. Methods Under sterilization, the swine’s chest was cut open and the left circumflex coronary artery (LCX) was ligated.Results After the operation, the changes of Electrocardiogram (ECG) and myocardial-enzymes in the blood serum and selective coronary angiography all proved that the animal model of AMI in the swine was successful. Conclusions Ligating coronary was a valuable method to make an animal model of AMI.

Objective To explore clinical characteristics and diagnosis of aggressive natural killercell leukemia (ANKL),and evaluate the value of flow cytometry (FCM) in diagnosing it.Methods A case of ANKL was reported and literatures were reviewed.Results The patient presented with persistent high fever,progressive pancytopenia and hepatosplenomegaly.The untypical cells could be seen by morphology.By FCM,NK cells consisted 83.3 ％ of total lymphocytes in bone marrow and immunophenotypes were CD34-,CD2+,CD7+,CD3-,CyCD3+,CD5-,CD16+,CD56+,CD30-,CD4-,CD8-,CD117-,CD11c,CD19-,CD45++,SSC+-++.T-cell receptor (TCR) and IgH gene rearrangement were negative and chromosome was normal.The patient was diagonised ANKL eventually.Conclusions ANKL is a quite rare disease with highly aggressive,poor prognosis and could be misdiagnosed easily.FCM combined with morphology is a convenient,handy,practicable and less invasive device for the diagnosis,and can be a preferred detection technique in some cases.

Obejective To reform the electrocardiogram teaching mode under clinical pathophisioligy and therapy(CPPT) mode.Methods The junior students of Grade 2010 in Second Clinical Medical College of Wuhan University were selected as subjects.The students were randomly divided into experimental group (44 students) and control group(52 students).Control group was taught by using traditional methods for electrocardiogram(ECG) diagnostics theory,and by using Diagnostics department's own Atlas,while experimental group was taught by reformed teaching methods,and ECG reformed textbook was used in their theoretical lessons,strengthening electrocardiogram and electrophysiology,cardiovascular disease combined.Meanwhile,the practice of teaching was taught by using preview-speaking Figure-Picture stories-Case-Read figure,a way to strengthen the theory-practice-theory of the cycle.The questionnaire was carried out in two groups after ECG teaching.After the end of the course two groups were given packet electrocardiogram atlas test and ECG theoretical knowledge examination and the above evaluation results were statistically analyzed by using SPSS 10.Results The statistically significant differences between experimental group and the control group were in the right ventricular hypertrophy,ventricular fibrillation,WPW syndrome,et al(P＜0.05).The ratio of the experimental group students' liking electrocardiogram course and their recognition of electrocardiogram teaching mode was higher than that of the control group while the ratio of their thinking ECG difficult was lower than that of the control group and the difference was statistically significant difference(P＜0.05).The excellent rate and good rate of the experimental group students' theory knowledge examination results were higher than the control group,two groups of results distribution difference being statistically significant(P=-0.043).Conclusions CPPT teaching model can effectively help students overcome the difficulties in reading electrocardiogram and deepen their understanding of theoretical knowledge and memory.

Objective To investigate the expression features and clinical significance of CD4+ CD25+ regulatory T cells in elderly patients with newly diagnosed acute myelocytic leukemia.Methods Totally 65 patients newly diagnosed as acute myeloid leukemia (AML group) and 72 healthy volunteers (control group) were divided into the elderly group (aged over 60 years) and the young group aged (44.6±2.9) years.The expression of CD4+ CD25+ regulatory T cells was detected by CD4,CD25 and CD127 three-color fluorescein-labeled and multiparameter flow cytometry.The expression features and clinical significance of CD4+ CD25+ regulatory T cells in each group were analyzed.Results After being gated on CD4+ lymphocytes,the expression level of CD4+ CD25+regulatory T cells was significantly increased in AML group as compared to control group [(7.06±2.60) ％ vs.(5.61 ± 1.06) ％,t =4.19,P=0.000].The expression level of CD4 + CD25 + regulatory T cells was higher in elderly AML patients than in elderly controls [(7.55 ± 2.78)％ vs.(5.98 ±1.08) ％,t=3.42,P=0.001].The expression of CD4+ CD25+ regulatory T cells was higher in young AML patients than in young controls [(6.09±1.91)％ vs.(5.14±0.82)％,t=2.21,P=0.036].The expression level of CD4+ CD25+ regulatory T cells was higher in elderly AML patients than in young AML patients [(7.55±2.78)％ vs.(6.09±1.91)％,t=2.19,P=0.032].Conclusions The dual roles of immunosenescence and tumor may cause the excessive accumulation of CD4+ CD25+regulatory T cells in elderly patients with newly diagnosed acute myeloid leukemia.

Objective:Mutation in the gap junction beta 6 (GJB6) gene has been reported to be associated with an autosomal dominant disorder hidrotic ectodermal dysplasia (HED), characterized by congenital nail clubbing, alopecia and palmoplantar keratoderma. The aim of this study is to investigate relationship between genetic mutation in GJB6 and HED in an affected Chinese family.
Methods:We selected a Chinese HED family consisting of a total of 17 individuals including 8 HED patients (5 males and 3 females). The whole coding region of GJB6 was amplified by polymerase chain reaction and sequenced.
Results:Sequence analysis identified a heterozygous missense mutation c.31G>A (p.G11R) in GJB6 gene of affected individuals, but not in healthy individuals.
Conclusion:A c.31G>A (p.G11R) missense mutation in GJB6 gene is the genotypic characteristic for HED in Chinese population.

The objective of the research is to investigate the elements of routine sandblast technique on the evolution of bending strength of dental infiltrated Al2O3 ceramics and the underlying erosion mechanism. The plane specimens of an infiltrated ceramic were manufactured, polished and then tested under the modified pen-like sandblasting apparatus (90 degrees erosive angle and 10 mm sandblasting distance), with different grit sizes, working pressure and disposing time. Half of samples were selected randomly and sintered subsequently with Vitadur alpha veneering porcelain. Before and after sintering, the three-point-bending strengths was measured, and the surfaces of dental porcelain were observed with SEM and LCSM. The bending strength of ceramics decreased significantly after sandblast as compared with that of empty control group. After the procedure of sintering the veneering porcelain, the descending evolution of bending strength slowed down. Under the present manufacturing conditions, grit size effect is prominent among those correlative elements of sand grit size, working pressure and disposing time. And fatigue cracking characterizes the mechanism of erosion of dental infiltrated Al2O3 ceramics.
Aluminum Oxide ; chemistry ; Dental Materials ; chemistry ; Dental Stress Analysis ; Humans ; Materials Testing ; Metal Ceramic Alloys ; chemistry ; Shear Strength ; Stress, Mechanical

Objective To compare the differences of bacterial distribution of intestinal flora in Microtus fortis living under laboratory feeding and wild survival conditions. Methods The 16S rDNA-V4-V5 region of bacteria in the ileocecal contents from Microtus fortis raised in lab and captured in wild were measured by high-throughput sequencing. The number of operational taxonomic units(OTUs)were sorted and calculated,and the species abundance and distribution and difference were analyzed. Results The rarefaction curves indicated that adequate sampling was achieved. At the phylum level,the distribution of intestinal flora between two groups was similar. The experimental group had a unique phylum, Lentisphaerae. The wild type group had 3 unique phylums,Fusobacteria,Thaumarchaeota and an unclassified phylum. At the genus level, the kind of intestinal flora in the wild type group was more abundant than the experimental group. Ruminococcus is the largest differential genus. Conclusions The microbial community structure and differences of Microtus fortis living under different conditions are obtained. It may further enrich the basic biology data of Microtus fortis.

Objective: To explore the effect of the umbilical cord mesenchymal stem cells(UC-MSCs) on the pulmonary fibrosis in silicosis rats. Methods: SPF male Sprague Dawley rats were randomly divided into control group, silica model group and UC-MSCs treatment group with 12 rats each group. SiO₂ intra-tracheal injection(0.5 ml of 50 mg/ml/rat) were applied to silica model group and UC-MSCs treatment groups. After that UC-MSCs treatment group received 1 ml UC-MSCs suspension (3×10⁶ cells/ml) by tail vein injection on the 29th, 36th, 43th and 50th day after exposure to the first silica suspension. On the 60th and 75th day after exposure to silica suspension, all animals were examed for pulmonary CT. Then the rats were euthanized on 75th day after the first exposure to silica.Lung's histopathological examination of the rats from all the groups were carried out. The content of hydroxyproline in lungs, TGF-β1 and IL-6 in serum were examined. Results: The lung's histopathological examination showed no obvious inflammatory cell and no fibrosis in the lung tissue of the control group, there were a lot of inflammatory cell aggregation and collagen fiber deposition in silica model group, while in the UC-MSCs intervention group and treatment group, there were less inflammatory cells and collagen fiber. The rats from silica model groups had higher HYP, TGF-β1 and IL-6 than the rats from UC-MSCs treatment group and control group. Lung fields of rats in the control group were clear and no obvious high-density shadow. Different-sized granular high-density shadows or reticular fibrous shadows were found diffusely distributed in the lungs of the rats in silica model group. Lung field of rats in UC-MSCs intervention group and treatment group were less high density shadows, and more clear. Conclusion UC-MSCs can alleviate the pulmonary fibrosis in silica model rats through regulating the secretion of some fibrosis related cytokines.