Circulating endothelial cells(CEC)are mature endothelial cells,which have been shed from the vascular cell lining and enter into blood circulation.Rare in healthy individuals,increased CEC in peripheral blood reflects significant vascular damage and dysfunction.Increased CEC have been documented in many human diseases characterized as vascular damage,including different types of tumors.Clinical data suggest that CEC count is a promising tool for monitoring disease activity with potential to assess tumor prognosis and response to treatment.

Objectives To explore the effects and mechanism of acupuncture treatment in emergent of acute hypertension by studying the acupuncture treatment on acute hypertension rats. Method The acute hypertension rat model was made by injecting adrenalin into the abdomen. After probing specific points, NO, ET-1, angiotensin and rennin levels were tested. Results Acupunctured for 30 minutes, the experimental group's diastolic pressure dropped and NO level rose, and these changes were statistically significant regarding those of the medicine control group. After the acupuncture treatment, the rennin level of the medicine control group and the experimental group were statistically different with the control group, but no significant difference was found between the medicine control group and the experimental group. Conclusion Probing Quechi, Taichong, Sanyinjiao and Neiguan may lead to the improved performance of the vessel endoderm, the rise of NO level and the decrease of angiotensin content, and consequently reduce the blood pressure of acute hypertension rats.

Objective To explore the significance of changes of matrix metalloproteinase-9 (MMP-9),interleukin-6 (IL-6),and tumor necrosis factor-alpha (TNF-oα) protein level in the cerebrospinal fluid (CSF) of children with viral encephalitis (VE).Methods The concentration of neuron-specific enolase (NSE),structural proteins 100B (S100B),and MMP-9,IL-6,TNF-α in the CSF of VE children were detected by an enzyme linked immunosorbent assay,and the correlations of them were analyzed.Results NSE,S100B,MMP-9,IL-6,TNF-α protein expression could be found significantly higher than those in the control group,and there were significant differences according to statistics expression trends(all P ＜0.05).The NSE protein expression was significantly positive related with S100B in the VE group (r =0.467,P =0.009),and the concentration was markedly negative related with the duration of viral encephalitis (r =-0.472,P =0.008).MMP-9,IL-6 protein expression were significantly positive related with NSE,S100B respectively (r =0.698,P =0.00 ; r =0.559,P =0.00 ; r =0.812,P =0.00 ; r =0.664,P =0.00).TNF-α protein expression was positive related with CSF S100B(r =0.363,P =0.049),but there was no correlation between TNF-α and NSE (r =0.245,P =0.193).Conclusions The neurons and the neuroglial cells are damaged in the viral encephalitis children.MMP-9,IL-6,TNF-α protein may participate in the pathological damage process of nerve cells in VE children in different degrees.

Objective To prospectively determine the dosimetric and clinical factors for predicting the risk of acute radiation oral mucositis ( ROM ) in patients receiving intensity?modulated radiotherapy ( IMRT) with concurrent chemotherapy for local advanced nasopharyngeal carcinoma. Methods Ninety?two patients who were treated with IMRT with concurrent chemotherapy from 2015 to 2016 for local advanced nasopharyngeal carcinoma were included in this study, and their acute ROM was scored according to the RTOG criteria. Grade≥3 ROM was used as a surrogate marker for severe mucositis, which was defined as a toxicity endpoint. The clinical data were reviewed, and the dose?volume histograms ( DVHs) of the patients were exported from the IMRT planning system. Optimal thresholds for predicting the incidence of severe ROM were evaluated by the area under the receiver operating characteristic ( ROC) curve ( AUC) . Results The incidence of severe ROM was 21%(19/92). Weight loss and V30 of the oral mucosa were determined as the independent predictors for severe ROM ( P=0017 and 0003, respectively) . The optimal cut?off point and AUC of V30 of the oral mucosa as a predictor for severe ROM were 7316%( 0842 sensitivity and 0671 specificity) and 0753( P=0001) , respectively. Conclusion Weight loss and V30 of the oral mucosa are predictors for severe ROM.

The effect of PubMed on the development of biomedical journals and the role of its Linkout function in extending the effect of journals were analyzed , followed by a description of the technologies and methods for the full-text seamless link of journal Websites and PubMed using its Linkout function with Biomedical and Environmental Sciences as an example .

Purpose:A phase I trial of radiotherapy concomitantly with weekly paclitaxel was carried out to define the maximal tolerant dose (MTD) by describing the dose limiting toxicity (DLT) of paclitaxel given as a 3 hour Ⅳ infusion in patients with locally advanced nasopharyngeal carcinoma (NPC). Methods:Patients with locally advanced NPC were enrolled into a prospective, dose escalating phase I study. Toxicity was graded according to CTC 2.0. MTD was defined when two out of six patients developed DLT. The starting dose of paclitaxel was 20 mg/m 2 once weekly IV over 3 hours, with a subsequent dose escalation of 10 mg/m 2 in cohorts of three new patients. Radiation therapy was administered with conventional technique over 7 weeks in 2.0 Gy/daily fractions for 5 days/week up to total doses of 68～70 Gy.Results:From December 2000 to June 2001, sixteen patients completed chemoradiotherapy, and all of them were eligible for toxicity evaluation. On the first dose level (20 mg/m 2 ) no patient experienced DLT. On the next dose level with 30 mg/m 2 , one patient experienced DLT with grade Ⅲ mucositis for 5 weeks, and among the additional 3 patients no one developed DLT. On the third dose level with 40 mg/m 2 , one patient developed grade Ⅲ mucositis for 4 weeks and another suffered from grade Ⅲ dermatitis for 4 weeks. In order to make the trial more credible, another 4 patients were added to 30 mg/m 2 level, and no DLT occurred. Thus, the accumulation of patients stopped. After a median follow-up 12 months, one patient died of multiple bone metastases. One patient needed an operation to eradicate the residual right upper cervical lymph node 3 months after radical irradiation. Fourteen patients survived with disease free condition.Conclusions:When paclitaxel is given weekly as a 3 hour infusion concomitant to conventional radiotherapy for locally advanced NPC, MTD is 30 mg/m 2 with mucositis and dermatitis as DLT, and other toxicities are mild.

Objective To explore the experiences of patients with abnormal extubation of PICC tubes.Methods Fifteen patients with abnormal extubation of PICC tubes participated in the semi-structure interviews.Data were analyzed by Nancy's phenomenological procedure.Results The patients experienced complicated mood which combined negative experience and positive experience,with complainant,helpless,worry,fear for negative experience,relieved,secure for positive experience.Conclusions Patients with abnormal extubation possessed negative experience.Suggestions should be given to nursing staff to communicate with patients before the extubation in order to reduce the dispute of nurses and patients.At the same time,we should summarize the reasons and analyze the factors about the abnormal extubation,and take the targeted intervention measures in the clinical work to decrease the incidence rate of PICC extubation.

Objective To explore the method of endovascular therapy for complicated aortic dissections.(Methods) The clinical data of 25 patients with complicated aortic dissections were analysed retrospectively.Results The patients′ ages ranged from 31-72 years with a mean of 50.2 years.Among the 25 cases,6 cases had severe ischemia of mesenteric artery,5 cases had renal artery ischemia,4 cases had severe(ischemia) of both legs,3 cases had renal arteries ischemia combined with superior mesenteric artery ischemia,2 had complicated aortic dissection combined with AAA,and in 5 cases the true aortic lumen was totally(compressed) by the false aneurysmal lumen.All patients underwent endovascular therapy,and the instant(technique) was successfully performed in all patients.Endoleak occurred in 3 cases after the stent-graft(deployment),it stopped spontaneously in 2 of them 7 days later,and 1 case with endoleak waiting for(treatment).In the other 22 patients,angiography after the operation showed that all the diseased area were sealed completely,and the viscera arterial blood supply was restored mainly via the true lumen.All the(patients) were cured and discharged.Conclusions In the management of complicated aortic dissections,(endoluminal) technique is simple,less traumatic,safe and has less complications as compared to the traditional operation.Improvement of the endoluminal technique is essential for successful treatment of these complicated cases.

Objective To establish a rapid and convenient method for determination of genomic DNA methylation in cells.Methods Five standard substances (dC, mdC, dA, dT and dG) were separated by high-performance capillary electrophoresis.Bare fused-silica capillary was used and eletrophoresis buffer was 48 mmol/L NaHCO3 with 60 mmol/L SDS, pH 9.6.The temperature of separation was controlled at 25 ℃ and a voltage of 20 kV was applied.The separation of the mixture was performed at a wavelength of 256 nm with UV-Vis detection and injection time was 5 seconds at 0.7 psi.Under optimal condition,genomic DNA methylation in methotrexate drug-resistant A549 cells was detected.Results The optimal condition was made by adjusting SDS concentration(40, 60, 80 mmol/L), pH value of running buffer(9.4,9.6, 9.8), voltage(15, 17, 19, 20, 22 kV), injection time(5, 10, 15, 20, 30 s) and capillary temperature(15, 20, 25, 30 ℃).The method for determination of genomic DNA methylation in cells was established.Five substances were completely separated by high-performance capillary electrophoresis in 10 mins.Intra-day coefficient of variation was less than 0.2% and inter-day coefficient of variation was less than 2%.The minimal detection limit was 2 μmol/L.Percentage of mdC in A549 parent cells was (4.80 ±0.52) %.Percentage of mdC in 15, 30, 40 μmol/L methotrexate drug-resistant A549 cells were (4.20±0.44) %, ( 3.70 ± 0.36 ) %, (3.10±0.35 ) %, respectively.Conclusions Genomic DNA methylation can be quantificated by high-performance capillary electrophoresis efficiently, rapidly, conveniently and sensitively.Genomic DNA methylation in methotrexate drug resistance cells decreases significantly.

Objective To establish a method for detection folylpolyglutamate syntbetase (FPGS),explore the change of FPGS in the drug-resistant A549 cells induced by methotrexate(MTX) enantiomer,and provide new tools to further investigate drug resistant mechanism. Methods A549 cell lines induced by L-( + )-MTX and D-( - )-MTX (25 μmol/L) were chosen to raise three cell lines as compared with MTX-sensitive cell line. Then FPGS were extracted for the CEIA-LIF and western blot was performed. After validation, FPGS antibodies were labeled by fluoreacein isothiocyanate (FITC) and produced a immune response with former-extracted FPGS. CELA-LIF can separate and detect labeled proteins according ruination time of the protein with different size and detect FPGS in drug resistant cell lines induced with L-(+)-MTX and D-(- )-MTX. The accuracy was evaluated as compared with western blot assay. Results The separation time of CEIA-LIF for labeled FPGS antibody and the immune complexes were7. 1 min and 8.9 min, and the resolving power was 4. 5. The process of protein separation and detection can be accomplished in less than 10 minutes. Western blot analysis showed there was no non-specific bands appears in the extract of these three cell lines after the freeze-thaw in liquid nitrogen. The minimum detection level in sensitive cell strains was 0. 68 mg/μl. The consent of FPGS in L-(+)-MTX and D-( - )-MTX induced cells were 46. 59% and 48. 36% compared with drug sensitive cell strains with CELA-LIF. Conclusions CELA-LIF was established in this experiment. It is efficient and sensitive for detecting of FPGS, which is similar to western blot method. The level of FPGS in L-( + )-MTX and D-( - )-MTX induced drug resistant cell lines is significantly lower, indicating the expression of FPGS is damaged.