Objective:To discuss the effects of 5-aza-2'-deoxycytidine(5-Aza-CdR)on autophagy and apoptosis of the TPC-1 cells in subcutaneous xenograft tumor tissue of the nude mice,and to clarify its mechanism.Methods:Sixteen female BALB/c nude mice were inoculated with human papillary thyroid carcinoma(PTC)TPC-1 cells in the right axilla to establish the xenograft tumor model.After tumor formation,the mice were randomly divided into control group and experiment group(n=8).The nude mice in control group were given an intraperitoneal injection of saline,while the nude mice in experiment group were given the intraperitoneal injection of 5-Aza-CdR,administered once every other day for four weeks.The growth status of xenograft tumor of the mice in both groups was observed,and the mice were sacrificed after the final administration and the tumor weights of the nude mice in two groups were detected.HE staining was used to observe the pathomorphology of xenograft tumor tissue of the nude mice in both groups;immunohistochemistry was used to detect the expression levels of microtubule-associated protein light chain 3(LC3),B-cell lymphoma 2(Bcl-2),and Bcl-2-associated X protein(Bax)in xenograft tumor tissue of the nude mice in two groups;real-time fluorescence quantitative PCR(RT-qPCR)and Western blotting methods were used to detect the expression levels of LC3,Beclin-1,Bcl-2,Bax,mitogen-activated protein kinase kinase(MEK),extracellular signal-regulated kinase 1(ERK1),extracellular signal-regulated kinase 2(ERK2),phosphorylated EPK1(p-ERK1),and phosphorylated EPK2(p-ERK2)mRNA and proteins in xenograft tumor tissue of the nude mice in two groups.Results:Compared with control group,the tumor volume and weight of the nude mice in experiment group were significantly decreased(P＜0.01).The number of cancer cells of the nude mice in control group was high,and the cells were densely arranged,with irregular shapes,clear nuclear staining,large overlapping nuclei,and lobulation,showing significant pathological mitotic figures consistent with PTC pathological characteristics.The number of cancer cells of the nude mice in experiment group showed a significant decresing trend,and the cells were sparse arrangement,nuclear shrinkage,and less distinct nuclei,with a significant increase in connective tissue.Compared with control group,the expression levels of LC3B and Beclin-1 mRNA and proteins in xenograft tumor tissue of the nude mice in experiment group were significantly increased(P＜0.05)and the ratio of and Bax/Bcl-2 was increased(P＜0.05 or P＜0.01),while the expression levels of MEK,ERK1/2,and p-ERK1/2 mRNA and proteins were significantly decreased(P＜0.05 or P＜0.01).Conclusion:5-Aza-CdR can inhibit the growth of TPC-1 cells in subcutaneous xenograft tumor tissue of the nude mice,induce the autophagy,and promote the apoptosis of the tumor cells.The mechanism may be related to the inhibition of the mitogen-activated protein kinase(MAPK)/MEK/extracellular signal-regulated kinase(ERK)signaling pathways.

Sarcopenia is an age-related syndrome with progressive, generalized loss of muscle mass, strength, and physiological function. Low muscle mass is an important diagnostic criterion for sarcopenia. Ultrasound is safe, convenient and cost-effective, with extensive availability. It's a promising diagnostic tool for muscle mass assessment and sarcopenia screening in the elderly population. This review focuses on the specific methods and latest research progress on ultrasound assessment of sarcopenia.

Dysphagia is often associated with incoordination between breathing and swallowing, resulting in the occurrence of aspiration, cough and aspiration pneumonia. This article reviewed the specific physiological mechanisms of respiration and swallowing and their clinical applications, which aimed to focus on the relationship between respiration and swallowing systems in health and disease, and to explore its guiding value in the clinical treatment of dysphagia.

Objective To explore the effects of mirror therapy combined with Tongdu Xingshen acupuncture on the upper extremity function of stroke survivors.Methods Sixty stroke survivors were randomly divided into a mirror group (n =20),an acupuncture group (n =20) and a combined group (n =20).In addition to routine rehabilitation treatment,those in each group received mirror therapy,acupuncture or both for 4 weeks.Before the treatment and after 2 and 4 weeks of treatment,all of the patients were assessed using the Fugl-Meyer motor function assessment (FMA),Brunnstrom upper limb and hand staging (BSULH),the Barthel Index (BI) and in terms of the active range of motion in the wrist contralateral to their hemiplegia (AROM).The combined group was also evaluated using functional magnetic resonance imaging (fMRI) before treatment and after the 4 weeks.Results After 2 and 4 weeks of the treatment,the average BI,AROM,FMA and BSULH results had improved significantly compared with before the treatment.The improvements in the combined group were significantly greater than in the other groups after 2 and 4 weeks.The fMRI demonstrated that there were high-intensity signals in the primary motor area,the premotor area and the supplementary motor area on the affected side after 4 weeks of treatment.Conclusions Mirror therapy combined with Tungdu Xingshen acupuncture can improve the functional performance of the upper extremities of stroke survivors.

Objective To explore the effects of rural family nursing intervention on psychological status of patients with cerebral apoplexy hemiplegia.Methods This community area was randomly divided into the intervention group and the control group, and 42 stroke patients with hemiplegia were randomly selected in each group. Patients in the intervention group were given family rehabilitation nursing intervention for 12 months by community nurses who received training and evaluation, while patients in the control group received original care mode, regular blood pressure measure, and routine follow up. Patients' psychological status before and after intervention were investigated.Results After 12 months' family rehabilitation nursing intervention, the psychological status of patients in the intervention group was significantly improved, and the differences between two groups were statistically significant (P<0.01).Conclusions Rural family rehabilitation nursing intervention can significantly improve the psychological status of patients with stroke, promote patients' recovery, and improve the quality of life of patients.

Objective To explore the impact of intensive follow-up visit in patients with nonvalvular atrial fibrillation taking Warfarin in process of anticoagulant therapy. Methods A total of 100 patients with persistent nonvalvular atrial fibrillation were randomly divided them into intensive follow-up group and regular follow-up group on average. We compared the treatment compliance, INR value, embolism and hemorrhage between two groups. Results The INR qualified rate was 86. 0% after 6 months taking medication in the intensive follow-up group and 72. 0% in the regular follow-up group (χ2 =4. 570,P<0. 05). The incidence rate of hemorrhage was 12% in the intensive follow-up group and 28% in the regular follow-up group (χ2 =4. 000,P<0. 05). Conclusions With the function of propaganda, education, supervision, promotion and attention on patients, follow-up visit makes patients taking Warfarin receive normative, effective anticoagulant treatment and improves the safety of medicine use, thus the effect of preventing stroke can be achieved.

Objective To explore the key points of preoperative emergency nursing in the patients with mechanical pros thetic valve dysfunction .Methods The clinical data from five patients with mechanical prosthetic valve dysfunction from March 2010 to November 2012 were retrospectively analyzed , and the key points of preoperative emergency nursing were summarized in the course of the disease .Results Four patients were recovered and discharged after they got the positive and effective rescue and accepted the valve replacement operation;one patient gave up further treatment because of serious condition .Conclusions The mechanical prosthetic valve dysfunction can lead to acute hemodynamic instability and eventually cause death of patients , and the valve replacement operation as the effective treatment should be carried out as early as possible .The preoperative intensive monitor and targeted emergency nursing can help patients to win the operative time and increase the chance of survival .

Objective To investigate the effect of the typical task teaching method on nursing education in the department of cardiology .Methods Eighty-seven nurse interns in 2012 and ninety nurse interns in 2013 were selected and divided into the control group and the observation group .The control group was given the traditional teaching method and the observation group was given the typical task teaching method .According to the specialized subjects characteristic , the acute myocardial infarction , acute left heart failure , arrhythmia diseases combined with ECG monitoring , cardiopulmonary resuscitation and oxygen inhalation technique were identified as the typical work tasks for the department of cardiology .The “clinical ability of nursing students evaluation questionnaire” was used to analyze and compared the teaching effects of the two groups of nursing students.Results The scores of practice ability, communication ability, health education, nursing management, nursing scientific research and the total score in the observation group were (52.38 ±10.64), (42.52 ±8.54), (20.45 ±4.28), (35.22 ±8.35), (17.48 ±5.44) and (195.08 ±43.68), respectively, which were significantly higher than (41.57 ±10.50), (35.12 ±8.02), (14.49 ±3.36), (28.45 ±8.67), (12.16 ±3.84) and (156.02 ±39.42) in the control group ( t=6.801, 5.938, 10.336, 5.292, 7.493, 6.239, respectively;P<0.05).Conclusions The typical task teaching method can effectively improve the clinical ability of nursing students in the department of cardiology .It is necessary to be promoted in the nursing education .

ObjectiveTo investigate the effect of individual donation-nucleic acid amplification test (ID-NAT) and minipool of 16 donations-NAT (P16-NAT) on the results of NAT of blood donors.Methods From February 2009 to June 2009,samples randomly collected from voluntary blood donors in Beijing were tested individually or in pooling of 16 donations by the PROCLEIX ULTRIO assay.For ID-NAT reactive samples with HBsAg,anti-HCV,or anti-HIV serologically unqualified,ID-NAT repeat reactive samples with serologically qualified,and P16-NAT reactive and followed resolution ID-NAT reactive samples,were performed for further discriminatory assays for HIV-1,samples and followed resolution ID-NAT reactive samples,were performed for further discriminatory assays for HBV,HCV and HIV-1discriminatory reagents.Samples which were HBV NAT + alone with serologically qualified were further quantified and confirmed of HBV DNA by Roche HBV quantitative PCR,analyzed by HBV serology and were diluted to simulate if they could be detected in P16-NAT.Results ( 1 ) Among 7613 samples tested by ID-NAT,26 were NAT positive,i.e.the ID-NAT positive rate was 0.34％ ( 26/7613 ). ( 2 ) Among 1004 P16 samples from 16 064 blood donations,27 were NAT positive,i.e.the P16-NAT positive rate was 0.17％ (27/16 064).(3)In serological qualified donations,ID-NAT yield rate (1 in 826,9/7438 ) was much higher than P16-NAT ( 1 in 7875,2/15 750) (x2 =11.880,P ＜ 0.05 ).All these 9 ID-NAT positive and 2 P16-NAT positive donations were discriminated as HBV NAT positive.There were no HCV NAT yield or HIV NAT yield samples. (4) Dilution assay showed only 2 of the 9 (22.22％ ) ID-NAT HBV yields were detected by P16-NAT.(5)Eight ID-NAT and 2 P16-NAT positive samples were quantified for HBV DNA and confirmed as HBV NAT yield,although the virus loads were very low:2 samples had HBV viral loads of 15 IU/ml and 472 IU/ml,6 samples ＜ 12 IU/ml,and 2 could not be detected in the original samples while had ＜ 12 IU/ml and 14.3 IU/ml in the 10 times concentrated samples.(6)Among 11 HBV NAT yield cases,3 (27.3％ ) were possible HBV window-period donors with all HBV seromarkers negative,the other 8 (72.7％ ) had occult HBV infections with anti-HBc or anti-HBe positive,however anti-HBc IgM negative.(7) The rate of initial P16-NAT reactive pools needed to be further tested by ID-NAT was 2.49％(25/1004).Initial P16-NAT reactive pools which caused by serologically qualified donations was 0.20％(2/1004).ConclusionsHBV NAT yield cases are detected at a higher frequency with ID-NAT than P16-NAT.In order to avoid samples with low viral loads would be undetected,NAT assay with high sensitivity should be selected and tested in minimized minipool donations or even with individual donation.

Objective To investigate the expression of CD40-CD154 co-stimulatory pathway in peripheral circulation and intestinal mucosa in patients with inflammatory bowel disease (IBD),the difference between the expression of CD40-CD154 in patients with IBD and that in healthy controls,and the correlation between CD40-CD154 levels and disease activity. Methods A total of 62 patients with Crohn's disease (CD),64 patients with ulcerative colitis (UC) and 56 healthy controls were enrolled. Enzyme-Linked Immuno Sorbent Assay (ELISA),SYBR-green real time PCR and immunohistochemical assay were respectively applied to evaluate expression of CD40-CD154 in plasma,mononuclear cells of peripheral blood and intestinal mucosa. Results Levels of CD40 (P=0. 000) and CD154 (P=0. 001) in plasma,mononuclear cells of peripheral blood and intestinal mucosa were significantly higher in patients with CD and UC than in healthy controls. However,no correlation between disease activity and CD40-CD154 expression in peripheral circulation or intestinal mucosa was detected (P ＞ 0. 05 ). Conclusion CD40-CD154 pathway activation is found in plasma,peripheral blood mononuclear cells and intestinal mucosa in patients with IBD,but is not correlated with disease activity.