Objective To investigate the relationship between cardiac vagus nerves and changes of connexins(Cx)and intracellular gap junction(GJ)distribution pattern in superior vena cava(SVC)myosleeve in dog with atrial fibrillation(AF).Methods Twenty four hybrid dogs were divided into sham operation group(Sham group,n=8),SVC-AO fat pad removed group(RM group,n=8)and SVC-AO fat pad reserved group(RS group,n=8).In RM group and RS group,right atrial pacing was performed at a frequency of 500～650/min for 6 weeks to establish AF model.AF was induced by programmed stimulation or burst stimulation of atrial pacing.The expression and distribution of Cx40 and Cx43 in the SVC myosleeve tissue in three groups were analyzed by immunofluorescence staining.Transmission electron microscopy was used to observe the uhrastructural organization of gap junction(GJ).Results The rate of inducing sustained AF(＞ 15 min)in RS group was significantly higher than that in RM group (P ＜ 0.01).The expression of Cx40 and Cx43 in the SVC myosleeve in sham group and RS group were significantly higher than that in RM group(P ＜ 0.05).Furthermore,the expression of Cx40 and Cx43 in RS group were obviously higher than that in sham group(P ＜0.05).The ratio of end-to-end to side-to-side in RS group was lower than that in Sham group and RM group.Comparing with RM group,the channel of GJ became shorter and wider in RS group(P ＜0.05).Sarcomere was dissolved and mitochondrion showed vacuole degeneration in RS group.Conclusion The remodeling of Cx40 and Gx43 in SVC myosleeve tissue may be mediated by vagus nerves.It is conducive to the maintenance and stability of AF.However,this effect can be weakened by removing SVC-AO fat pad of canine.

Objective To understand the risk factors for postoperative pulmonary infection in patients undergoing spinal surgery,and put forward the intervention measures.Methods Patients who underwent spinal surgery in a hospital from May 2008 to June 2016 were analyzed retrospectively,they were divided into non-pulmonary infection group and pulmonary infection group according to whether they had postoperative pulmonary infection,clinical data of two groups were compared.Results A total of 612 patients who underwent spinal surgery were monitored,43 had postoperative pulmonary infection,incidence of postoperative pulmonary infection was 7.03％.Univariate analysis showed that 14 risk factors for pulmonary infection in patients after spinal surgery were as follows:length of hospital stay≥30 days,long-term smoking,chronic pulmonary disease,diabetes,number of surgical level≥2,general anesthesia,duration of operation≥4 hours,bleeding≥500mL,time of bed rest≥7 days,use of glucocorticoid,indwelling urinary catheter,mechanical ventilation,serum albumin＜30 g/L,blood glucose≥1 1mmol/L,and hemoglobin＜90 g/L(P＜0.05);while atomization inhalation was a protective factor(P＜0.05).Multivariate logistic regression analysis showed that 6 independent risk factors for pulmonary infection in patients after spinal surgery were as follows:length of hospital stay≥30 days,long-term smoking,chronic pulmonary disease,general anesthesia,time of bed rest≥7 days,and use of glucocorticoid(all P＜0.05),while atomization inhalation was a independent protective factor(P＜0.05).Conclusion Patients with pulmonary infection after spinal surgery is related to multiple factors,comprehensive and effective preventive measures should be taken according to the risk factors of postoperative pulmonary infection,so as to reduce the incidence of postoperative pulmonary infection in spinal surgery patients.

As one of the significant parts of medical science research in China, the research on Chinese medicine (CM) reflects the essence of healthcare tradition in the country both theoretically and clinically, and embodies the values of Chinese culture. Therefore, in the practice of ethics review on CM research protocols, besides abiding by the contemporary prevalent international principles and guidelines on bioethics, which emphasizes the scientific and bioethical value of the study, we should also stress the CM theoretical background and relevant clinical experience in the framework of Chinese culture and values. In this paper, we went over the traits of CM clinical research and the experience from the practice of ethics review by the institution review board for bioethics, and then attempted to summarize the key points for the bioethics review to CM researches in China, so as to serve as reference for the bioethics review to traditional and alternative medicine researches.
China ; Drug Monitoring ; Ethics Committees, Research ; ethics ; Ethics, Medical ; Humans ; Informed Consent ; Medicine, Chinese Traditional ; adverse effects

Objective To investigate the situation of chronic diseases and the effects on quality of life among different-aged elderly in community and provide evidence for targeted improvement quality of life.Methods During March to July 2015, the elderly who was aged 60 and over as respondents from two communities in Kunming were enrolled. Cross-sectional study and cluster sampling were used based on Activities of Daily Living scale (ADL) and Balthel index.questionnaire was designed and information of chronic disease in the elderly was colected.The effects on Balthel index in different chronic diseases and age groups were analysed.Results A total of 589 subjects were investigated, chronic disease prevalence was93.70％, and the highest prevalence is hypertension that was 27.50％.The quality of life was worse in the elderly who suffered from three kinds of chronic diseases and more older. The quality of life in different age groups elderly was statistically significant (P ＜ 0.05).Conclusion The quality of life in the community elderly is relate with age and the type of chronic diseases.In order to improve their quality of life health guidance should be strengthened.

Abstract: Objective　To evaluate the influence of coronavirus disease 2019 (COVID-19) prevention and control measures on the transmission and epidemic of influenza in Chongqing, so as to provide references for formulating targeted influenza prevention and control strategies. Methods　The influenza surveillance data, during the year 2018 to 2020, were collected through the "China Influenza Surveillance Information System", and the seasonal characteristics of influenza epidemic were analyzed. The percentage of influenza like cases (ILI%) and influenza virus positive rate between 2020 and 2018-2019 were compared, so as to evaluate the impact of COVID-19 prevention and control measures on influenza epidemic characteristics. Results　The annual proportions of ILI cases in Chongqing were respectively 3.53%, 2.23% and 1.2% from 2018 to 2020, while the positive rates of influenza virus were respectively 13.97%, 23.81% and 2.65%. The distribution trend of ILI% from 2018 to 2019 fluctuated were similar, but it continued to drop and remain at a low level since February 2020. The positive rate of influenza virus showed an epidemic peak from December to March in 2018-2019, also peaked from November 2019 to January 2020, but decreased to 0 in March. ILI% was positively correlated with the positive rate of influenza virus (r=0.404 8, P<0.05). In 2020, compared with the same period of 2018-2019, the growth rate of ILI% was -66.09% and -46.32%, respectively. The positive rate of influenza virus in 2020 decreased by 81.03% and 88.87% compared with the same period of 2018-2019, respectively. The growth rates of influenza virus positive rate in January 2020 were decreased with a small rate of about 39.87%, and with a significantly decline of more than 93.65% from February. No influenza epidemic was found after March. Conclusions　Since COVID-19 prevention and control measures were implemented in January 2020 in Chongqing, the ILI% and the positive rate of influenza virus in sentinel hospitals decreased significantly. In the season of high incidence of respiratory infectious diseases, personal protection and other measures can effectively reduce influenza virus infection.

Objective To compare the similarities and the differences of nursing care on patients with idiopathic thrombocytopenic purpura. Underwent laparoscope splenectomy and open splenectomy. Methods A total of 122 cases admitted from October 1996 to September 2008 were selected and investigated prospectively.Among them, 72 cases were underwent laparoscope spleneetomy, the other 50 cases were accepted open splenectomy. Indexes of the recovery after operation were compared. Results The mean operation time was longer in the laparoscopic splenectomy group than that in the open group ( 135.3 min vs 108.5 min,P ＜0. 05).The laparoscopic group decreased more significantly than the open group in blood loss ( 110 ml vs 185 ml),abdominal drainage volume ( 100 ml vs 230 ml), the off-bed ambulation time(26. 2 h vs 46.9 h), the anal aerofluxus time(28.9 h vs 68. 1 h) ,food intake time(32. 2 h vs 72.3 h), and post operative hospitalization (8.5 d vs 15. 1 d). Postoperative pain was significantly less in LS group ( P ＜ 0. 05 ). There were no differences in postoperative complication, treatment effectiveness and temperature between two groups (P ＞ 0. 05 ).Conclusions Laparoscope splenectomy, whereas of less traumatic and low morbidity, results in comparable effects as open splenectomy for the treatment of idiopathic thrombocytopenic purpura.. It has important significance to know both similarities and differences of clinical nursing care for patients undergoing the two ways of splenectomy, in order to enhance the nursing quality for peri-operative patients with splenectomy via laparoscope and promote their postoperative rehabilitation.

Objective To analyze the epidemiological characteristics and antimicrobial resistance of clinically isolated Pseudomonas putida (P.putida),and provide basis for rational prevention and treatment of P.putida infection.Methods P.putida isolated between January 2010 and December 2015,as well as clinical data of patients infected with P.putida were collected,antimicrobial susceptibility of isolates was determined by Kirby-Bauer disk diffusion susceptibility testing of Clinical and Laboratory Standards Institute (CLSI) of America,susceptibility testing results of isolated strains were analyzed by WHONET 5.5 software.Results A total of 91 strains of P.putida were isolated from clinical specimens,most were from elderly patients aged ＞60 years(70.33％);the major underlying disease was community-acquired pneumonia (23.08％),followed by chronic pulmonary heart disease (15.38％);the main specimen was sputum(57.14％),followed by urine(27.47％);P.putida mainly distributed in department of respiratory medicine (28.57 ％),followed by department of cardiovascular medicine (13.19 ％).P.putida had high resistance rate to aztreonam (52.75 ％),while resistance rates to gentamicin,imipenem,levofloxacin,ceftazidime,meropenem,and ciprofloxacin were 7.78％,9.89％,2.20％,9.89％,7.69％,and 2.22％ respectively,resistance rates to amikacin and polymyxin were both 0.Conclusion P.putida infection mainly occurs in elderly patients with underlying diseases,mainly respiratory tract infection,resistance rates to most antimicrobial agents were ＜ 10 ％.

OBJECTIVETo investigate the primary culture of mammary epithelial cells derived from human breast hypertrophy.

METHODSMammary epithelial cells of human breast hypertrophy were isolated and cultured by the collagenase digestion method. The morphology observation and identification of the cultured cells were performed by inverted microscope observation, HE staining and cytokeratin immunohistochemical staining.

RESULTSMost of the cultured cells were pebbles-like or polygon under the inverted microscopy. Some had irregular form. They had typical island-like appearance during multiplication with close connection between the cells. The HE staining results showed the cytoplasm was stained pink or lilac, the nucleus was stained bluish violet and was round or oval in shape, with clearly visible chromosomes in dark blue. The cytokeratin immunohistochemical staining demonstrated the tissue-specific expression of cytokeratin 18 in epithelial cells by the cytoplasm stained claybank.

CONCLUSIONHigh purity of primary mammary epithelial cells derived from human breast hypertrophy can be obtained by the collagenase digestion method and conditioned medium.

Breast ; cytology ; pathology ; Cells, Cultured ; Epithelial Cells ; cytology ; Female ; Humans ; Hypertrophy ; pathology ; Primary Cell Culture ; methods

Aim To explore the anticomplementary ac-tivity and active constituents of Phyllanthus urinaria. Methods Being guided by bioactive screening,the anticomplementary constituents of P.urinaria were iso-lated and purified by solution partition and chromato-graphic techniques,and their structures were identified by 13C-NMR spectrum and the comparison of reported data. The anticomplementary activity and possible mechanism were assayed.Results The EtOAc fraction of the methanol extract of P.urinaria was shown to be the active fraction,and two compounds were purified from the fraction and were identified as corilagin and ellagic acid.The EtOAc and the two compounds signifi-cantly inhibited the hemolysis of the complement classi-cal pathway,with IC50values of 53.77 mg·L-1, 176.54 mg·L-1and 102.23 mg·L-1,respectively. While they just showed slight effect on inhibiting the hemolysis of the complement alternative pathway. All of them affected the formation of C3 convertase of the classical pathway. Conclusions The polyphenols are main anticomplentary constituents of P. urinaria,and its mechanism is related to inhibiting formation of C3 convertase of the classical pathway.

Present work was designed to quantitatively evaluate the performance of diffusion-weighted magnetic resonance imaging (DWI) in the diagnosis of the presence of metastasis in lymph nodes (LNs).Eligible studies were identified from systematical PubMed and EMBASE searches.Data were extracted.Meta-analyses were performed to generate pooled sensitivity and specificity on the basis of per-node,per-lesion and per-patient,respectively.Fourteen publications (2458 LNs,404 lesions and 334 patients) were eligible.Per-node basis demonstrated the pooled sensitivity and specificity was 0.82 (P＜0.0001) and 0.90 (P＜0.0001),respectively.Per-lesion basis illustrated the pooled sensitivity and specificity was 0.73 (P=-0.0036) and 0.85 (P＜0.0001),respectively.Per-patient basis indicated the pooled sensitivity and specificity was 0.67 (P=0.0909) and 0.86 (P＜0.0001),respectively.In conclusion,DWI has rather a negative predictive value for the diagnosis of LN metastasis presence.The difference of the mean apparent diffusion coefficients between benign and malignant LNs is not yet stable.Therefore,the DWI technique has to be further improved.