Objective:To develop an enzyme immunoassay for the detection of Osteogenic Growth Peptide in serum for clinical investigation.Methods:Two kinds of competitive Enzyme linked immununosorbent assay were employed,based on sensitivity and shape of dose-reaction curve,the most suitable testing pattern was selected for further application.Results:Purified antibody was better than salting-out antibody in competitive Enzyme linked immununosorbent assay in terms of standard curve.Modified competitive Enzyme linked immununosorbent assay was better than competitive Enzyme linked immununosorbent assay in sensitivity.Conclusion:Modified competitive Enzyme linked immununosorbent assay for Osteogenic Growth Peptide is sensitive enough for clinical investigation.

Adult ; Aged ; Female ; Humans ; Laryngeal Diseases ; surgery ; Laryngoscopy ; Lasers, Gas ; therapeutic use ; Male ; Middle Aged ; Polyps ; surgery ; Treatment Outcome ; Vocal Cords ; Young Adult

Objective To investigate the effects of dihydroartemisinin (DHA) on the proliferation of gastric cancer cell line SGC7901 and its mechanism.Methods SGC7901 cells were divided into the DHA group and the control group.SGC7901 cells in the DHA group were treated with DHA of different concentrations (6.25,12.50,25.00,50.00,100.00 μmol/L),SGC7901 cells in the control group were cultured in the 0.1％ DMSO medium.The proliferation of SGC7901 cells was detected by the MTF method at different time points (24,48,72 hours).Cell cycles of SGC7901 in the DHA group were observed by flow cytometry at 24 hours after treatment.The expressions of Cyclin A,Cyclin D1,Cyclin E,Cyclin-dependent kinase 4 (CDK4) and P16 were detected by Western blot after treating SGC7901 with DHA at concentration of 100μmol/L for 24 hours.The interaction between CDK4 with Cyclin D1 or P16 was examined using the co-immunoprecipitation assay.All data were analyzed using the one-way analysis of variance or the t test.Results The proliferation of SGC7901 cells was significantly inhibited after the treatment with DHA at different concentrations (6.25,12.50,25.00,50.00,100.00 μmol/L) for 24,48 and 72 hours (F =78.66,235.37,93.75,P ＜ 0.05).Compared with control group,the number of SCG7901 cells in the G0/G1 phase in the DHA group was significantly increased (F =18.42,P ＜0.05).After treating SGC7901 cells with DHA for 24 hours,the protein expressions of Cyclin D1 and CDK4 were 0.67 ± 0.15 and 0.64 ± 0.18 in the control group,which were significantly higher than 0.17 ± 0.05and 0.24 ± 0.06 in the DHA group (t =7.746,5.164,P ＜ 0.05).The protein expressions of Cyclin E were 0.42 ± 0.06 in the control group and 0.35 ± 0.06 in the DHA group,with no significant difference (t =2.021,P ＞ 0.05).The protein expressions of Cyclin A were 0.35 ± 0.09 in the control group and 0.38 ± 0.08 in the DHA group,with no significant difference between the 2 groups (t =1.266,P ＞ 0.05).The protein expressions of P16 were 0.29 ± 0.07 in the control group and 0.54 ± 0.12 in the DHA group,with significant difference between the 2 groups (t =4.408,P ＜ 0.05).The results of co-immunoprecipitation assay showed that DHA decreased the interaction between CDK4 and Cyclin D1,and increased the interaction between CDK4 and P16.Conclusion DHA induces SGC7901 cells arrested in G0/G1 phase,and the effect may be related with its downregulation of Cyclin D1 and CDK4,up-regulation of P16,decreasing the interaction between CDK4 and Cyclin D1,and increasing the interaction between CDK4 and P16.

The mobilization efficiency of granulocyte colony-stimulating factor (G-CSF) and stem cell factor (SCF) to bone marrow mononuclear cells (MNCs) in mice was observed, and the changes of CXCL12/CXCR4 signal were detected in order to find out the mobilization mechanism of stem cells. Kunming mice were randomly divided into two groups. The mice in treatment group were subjected to subcutaneous injection of G-CSF at a dose of 100 mug/kg and SCF at a dose of 25 mug/kg every day for 5 days, and those in control group were given isodose physiological saline. The MNCs were separated, counted and cultured, and the colony-forming unit-fibroblast (CFU-F) was evaluated. CD34(+)CXCR4(+) MNCs were sorted by flow cytometry. The expression of CXCL12 protein in bone marrow extracellular fluid was detected by ELISA, and that of CXCL12 mRNA in bone marrow was measured by RT-PCR. The results showed that the counts of MNCs in peripheral blood and bone marrow were increased after administration of G-CSF/SCF (P<0.01). The factors had a dramatic effect on the expansion capability of CFU-F (P<0.05). Flow cytometric of bone marrow MNCs surface markers revealed that CD34(+)CXCR4(+) cells accounted for 44.6%+/-8.7% of the total CD34(+) MNCs. Moreover, G-CSF/SCF treatment induced a decrease in bone marrow CXCL12 mRNA that closely mirrored the fall in CXCL12 protein. In this study, it is evidenced that G-CSF/SCF can effectively induce MNCs mobilization by disrupting the balance of CXCL12/CXCR4 signaling pathway in the bone marrow and down-regulating the interaction of CXCL12/CXCR4.

Objective To evaluate the clinical results of posteromedial supine approach plus anterolateral approach for treatment of posteromedial condylar tibial plateau split fracture combined with lateral compartment depression.Methods A retrospective analysis was done on 48 cases of posteromedial condylar tibial plateau split fracture with lateral compartment depression operated through posteromedial supine plus anterolateral approaches from February 2011 through March 2013.There were 37 men and 11 women,aged 15-67 years (mean,42.5 years).Fracture occurred at the left side in 31 cases and at the right side in 17 cases.Interval between injury and operation ranged from 5 to 16 days (mean,8.7 days).Reconstructive or T-shaped plates were used for posteromedial condylar split tibial plateau fracture.Anatomical or locking compression plates were used for lateral compartment depression,but autogenous ilium bone grafting was performed laterally when bone defect was obvious.Results Average operation time was 2.8 hours (range,2-3.5 hours) and average length of stay was 21 days (range,12-45 days).All cases were followed up for mean 12.8 months (range,5-25 months).All fracture healed from 4 to 8 months (mean,6.7 months).Mean Rasmussen score for radiological results was 16.9 points (range,16-18 points) immediately after operation.Hospital for special surgery (HSS) knee score averaged 86.4 points (range,76-95 points) 8 months after bone healed,indicating the excellent results in 27 cases,good in 16 cases,fair in 4 cases and poor in 1 case with a good to excellent rate of 90％.At the last follow-up,postoperative knee range of motion averaged-5°-135°.All incisions healed primarily without vascular nerve injury and implant loosing or breakage.There was an extension lag in 1 case with knee range of motion of 20°-130° and osteoarthritis in 1 case,but both were improved with non-operation therapy.Conclusion Posteromedia] supine plus anterolateral approaches are suitable for posteromedial condylar tibial plateau split fracture with lateral compartment depression,for the combined approaches gain advantages of easy operation,good reduction,rigid fixation,few soft-tissue complications and satisfactory clinical results.

Objective To investigate the effect of thrombelastography ( TEG ) monitoring on anticoagulation therapy in deep vein thrombosis ( DVT ) in the perioperative period of arthroplasty replacement through dynamic detecting of TEG.Methods 60 patients under went total knee arthroplasty ( TKA) were selected as the patient group from 2011 to 2013, Including 22 men and, 38 women, aging from 50 to 74 years old.These patients were divided into low molecular weight heparin ( LMWH ) group and rivaroxaban group according to random number table.Each group had 30 cases.Patients in both were all given routine dose anticoagulant drugs to prevent DVT.Other treatment were the same as conventional therapy for both group patients.Meannhile, 42 health examination participants were selected as the control group, 24 men and 18 women, aging from 45 to 75 years old.The parameters of TEG were measured by TEG@5000 thromboelastograph hemostasis system ( American Haemoscope Corporation).DVT was diagnosed by LOGIQ 7 color Doppler ultrasonic diagnostic apparatus of American GE Corporation. Data were analyzed by SPSS17.0.The predictive value of TEG on DVT was evaluated by receiver operating characteristic cure (ROC),sensitivity,specificity,positive predictive value (PPV) and negative predictive value (NPV). Results Abnormal detection rates of Angle,MA,CI in rivaroxaban group(36.7%,46.7%,36.7%) were higher than LMWH group ( 10.0%, 20.0%, 13.3%) , and the differences between both groups all had statistical significance between both group(χ2 =5.963,P=0.015;χ2 =4.800,P=0.028;χ2 =4.356,P=0.037).CI , MA and Angle had better clinical diagnostic value on DVT.Their sensitivity was 75.0%, 75.0% and 62.5%, specificity respectively was 80.8%, 76.9%and 78.8%respectively.MA=68.35 mm
could be the best clinical diagnosis of critical point on DVT at anticoagulation treatment endpoint.Conclusion TEG can monitor coagulation state of TKA patients, TEG′R can evaluate the safety and effectiveness of anticoagulation therapy on DVT.(Chin J Lab Med, 2015, 38:333-336)

Objective: To investigate the influence and significance of DHA on expression of angiogenesis-related genes in SGC7901 cells. Methods:SGC7901 were treated with DHA (5, 10, 20, 40, and 80μmol/l) for different times (24, 48, and 72 h), and the growth inhibition was detected by MTT. The expression of vascular endothelial growth factor (VEGF-C), cyclooxygenase-2 (COX-2) vascular cell adhesion molecule-1 (VCAM-1), and PTEN mRNA were detected by fluorescence-based quantitative poly-merase chain reaction (qRT-PCR). Their corresponding protein levels were tested by Western blot. Results:DHA significantly inhibited the growth of SGC7901 cells in a dose-and time-dependent manner (P<0.05). The expression of the angiogenesis-related genes signifi-cantly changed, as shown by RT-PCR and Western blot analyses. Compared with the control group, the expressions of VEGF-C, COX-2, and VCAM-1 were down-regulated, whereas the expressions of PTEN were up-regulated, after DHA treatment (P<0.05). Con-clusion:DHA inhibits cell growth in gastric cancer SGC7901 cells. The effect may be due to its reduction of VEGF-C, COX-2, and VCAM-1 gene expression, as well as its promotion of PTEN expression in gastric cancer cells.

The efficacy of constructivism teaching mode in physical diagnostics teaching was evaluated in this study. We built up the constructivism teaching mode in diagnostics teaching taking the clinical symptoms as the theme, and through such aspects as courseware design, teaching plan preparation, SP playing and inquiry, SimMan simulated physical examination, condition analysis, etc. Then questionnaires were conducted to analyze the role of the constructivism teaching mode in diagnostics teaching. The diagnostics constructivism teaching mode can provide students with a platform for self-construction of diagnostics and integrated application of knowledge. Meanwhile, students' sense of participation can be improved and multiple learning skills are enhanced during the course.

Objective To investigate the predictive value and clinical significance of dynamic monitoring of thromboelas?tography (TEG) and D?dimer on anticoagulation therapy concurrenting DVT in the perioperative period of arthroplasty replace?ment. Methods All of 60 patients of total knee arthroplasty (TKA) were selected as patient group from 2011 to 2013. They were divided into low molecular weight heparin (LMWH) group and rivaroxaban group according to random number table. LM?WH group was given LMWH (xi fu quan) 4250 IUAXa 12 h after knee replacement, im, qd for 7 days, then rivaroxaban 10 mg, qd for 7 days. Rivaroxaban group was given rivaroxaban 10 mg 6 h after knee replacement, qd for 14 days. Meanwhile, 42 health examination participants were selected as control group. The parameters of TEG were detected by TEG 5000 thrombo?elastograph hemostasis system (American Haemoscope Corporation). Results D?dimer levels of postoperative before anticoagu?lation therapy were highest and there was statistical difference, while other parameters had no statistical difference. Intra?group comparison:the levels of R, K, Alpha, CI of TEG and D?D in LMWH group and the levels of Alpha, MA, CI of TEG and D?D in ri?varoxaban group had statistical difference, while other parameters' levels showed no statistical difference. At anticoagulation treat?ment endpoint, DVT occurred in 8 cases with an incidence of 13.3%(8/60). 7 cases were intramuscular vein thrombosis, and 1 case was popliteal vein thrombosis. The levels of Alpha, MA, CI of TEG and D?D in DVT group were higher than no DVT group, and there was statistical difference. TEG's CI, MA, Alpha and D?dimer had better clinical diagnostic value on DVT, whose area un?der receiver operating characteristic cure (ROC) respectively was 0.746, 0.733, 0.707 and 0.644, with sensitivity of 75%, 75%, 62.5%and 62.5%, specificity of 80.8%, 76.9%, 78.8%and 71.1%, positive predictive value of 37.5%, 33.3%, 31.3%and 25.0%, and negative predictive value of 95.4%, 95.2%, 93.2%and 93.1%. MA=68.35 mm was the best clinical diagnosis of critical point on DVT at anticoagulation treatment endpoint. Conclusion CI, MA, Alpha of TEG are better than D?dimer in predicting the inci?dence of DVT in the perioperative period of orthopaedics major operation. If these indexes are detected, the diagnosis value ’s ac?curacy of DVT will be improved.

Objective: To investigate the epidemiological characteristics of hand, foot, and mouth disease (HFMD) in Haishu District, Ningbo City, Zhejiang Province from 2011 to 2022, so as to provide the basis for the formulation of HFMD prevention and control strategies. Methods: Data of HFMD in Haishu District from 2011 to 2022 were collected from Chinese Disease Prevention and Control Information System, and the epidemiological and etiological characteristics were analyzed using a descriptive epidemiological method. The trends in incidence of HFMD and prevalence of positive etiological tests were analyzed using annual percent change (APC). Results: A total of 33 334 cases of HFMD were reported in Haishu District from 2011 to 2022, with an average annual reported incidence of 279.16/105, showing no significant trend (APC=-5.492%, P>0.05). The average annual reported incidence of HFMD was lower after the enterovirus 71 vaccine was launched (from 2017 to 2022) than before (from 2011 to 2016; 219.69/105 vs. 343.70/105, P<0.05). The incidence of HFMD showed seasonal characteristics, with a peak from May to July. There were 19 720 male and 13 614 female cases, with a male-to-female ratio of 1.45∶1. The age of the HFMD cases ranged from 27 days to 63 years old, and the children aged 5 years and below were predominant (30 657 cases, 91.97%). A total of 1 976 specimens of HFMD cases were collected from 2011 to 2022, and 1 509 enterovirus positive specimens were detected, with a positive rate of 76.37%. The positive rates of enterovirus 71 decreased (APC=-32.599%, P<0.05), the positive rates of coxsackievirus A16 increased (APC=9.226%, P<0.05), while the positive rates of other enteroviruses showed no significant change (APC=0.808%, P>0.05). Conclusions The average annual reported incidence of HFMD in Haishu District from 2011 to 2022 decreased after the enterovirus 71 vaccine was launched, with a peak in spring and summer. Children aged 5 years and below were the high-incidence population, and coxsackievirus A16 was the main serotype.