BACKGROUND:Epidermal growth factor is an auxiliary growth factor,but its effect on the growth of bone marrow mesenchymal stem cells (BMSCs) is uncertain.OBJECTIVE:To establish a mature method for isolation,extraction and identification of rat BMSCs,to investigate the effects of epidermal growth factor (EGF) on the proliferation and migration ability of BMSCs and to explore its potential mechanisms at the same time.METHODS:Rat BMSCs were isolated and purified using the improved whole bone marrow adherence method.After the cells were subcultured to the third generation,we detected the expression of cells surface antigens CD29,CD45 and CD90 by flow cytometry.BMSCs were further identified by osteogenic and adipogenic differentiation.Meanwhile,the effect of EGF on the proliferation of passage 3 BMSCs was measured by cell counting kit-8 and clonogenic assay.And the migration of P3 cells was verified by Transwell chamber.In addition,we detected the expression of proteins related to PI3K/Akt and nuclear factor-κB signaling pathways by western blot assay.RESULTS AND CONCLUSION:The primary BMSCs were polygonal and spindle-shaped,and then gradually appeared to be spindle-shaped.The results of flow cytometry demonstrated that the passage 3 cells were positive for CD29 and CD90,but negative for CD45.Furthermore,we successfully induced the osteogenic and adipogenic differentiation of BMSCs in vitro.Additionally,our data demonstrated that EGF promoted the proliferation and migration of passage 3 BMSCs.The relative expression levels of p-Akt and Bcl-2 of PI3K/Akt signaling pathway was up-regulated and the expression of Bax was down-regulated.At the same time,the relative expression level of phosphorylated p65 of nuclear factor-κB signaling pathway was up-regulated and the expression of phosphorylated inhibitor κB was down-regulated.Moreover,the downstream protein of matrix metalloproteinase-9 was up-regulated.Those proteins were related to the migaration of BMSCs.In summary,our results suggest that EGF could promote the proliferation and migration of BMSCs.

Objective To compare the early clinical efficacy of unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) for elderly patients with medial compartmental knee osteoarthritis.Methods A total of 35 elderly patients with medial compartmental knee osteoarthritis were selected from September 2014 to March 2018 in our hospital, of whom 16 cases treated by UKA were observation group and 19 cases treated by TKA were control group.ResultsThe operation time, intraoperative blood loss, the rate of perioperative blood transfusion, postoperative drainage volume and hospitalization stays of observation group were less than those of control group, the difference were significant (P＜0.05).Before the treatment, there was no significant differences in the KSS score between two groups (P＞0.05).After the treatment, KSS scores of two groups had been improved to some extent, and the observation group was better than the control group, the difference was significant (P＜0.05).No revision or infection happened in 1 year post-operative follow-up of either group.The observation group (0) were less than the control group (26.32％) in thrombosis rate, the difference was significantly (P＜0.05).ConclusionBoth UKA and TKA have certain early clinical efficacy, but UKA had advantages such as shorter operation time, shorter hospitalization, less pain, lower incidence of adverse reaction, which can promote the postoperative function recovery, the early clinical efficacy is more significant.

Objective To investigate the phenotype, frequency and function of CD4 + T cell subsets and the relevant cytokines, as well as the relationship between these cells and appearance of pneumonia of novel (H1N1 ) influenza A patients. Methods 68 healthy people,53 confirmed novel A( H1N1 ) influenza patients without pneumonia and 16 confirmed severe novel A( H1N1 ) influenza patients with pneumonia were enrolled in this study. Viral load in nasopharyngeal swabs specimens was measured by real time PCR assay.The phenotype and percentage of CD4+ T cell subsets including Th1, Th2, Th17, and Treg cells were measured by Flow cytometry analysis. The relevant cytokines in plasma including TGF-β, IL-6 and IFN-γ were measured by ELISA. Data was analyzed by one way ANOVA. Results It was found that peak viral load and viral shedding period of severe patients with pneumonia was significantly increased compared with mild patients without pneumonia ( P ＜ 0. 05 ). The percentage of Th17 cells of severe patients with pneumonia was significantly diminished compared to that of healthy subjects and mild patients without pneumonia( P ＜ 0. 05 ). However, Th1 ,Th2, Treg cells frequencies had no significant differences ( P ＞ 0. 05 )among these three groups. The level of TGF-β in plasma for the severe patients with pneumonia was also significantly decreased compared to that of healthy subject and mild patients without pneumonia( P ＜0. 05 ).The viral shedding period inversely correlated with the frequency of Th17 cells ( r = - 0. 38, P ＜ 0.05 ).Conclusion H1N1 influenza A virus can inhibit Th17 cells to differentiate, particularly more extent in patients with pneumonia. Impaired Th17 cells may correlate with viral clearance and pneumonia of novel H1N1 influenza A patients.

OBJECTIVETo compare the quality of life in patients with prevertebral or retrosternal reconstruction after cervical tubular gastroesophagostomy.

METHODSA total of 167 patients enrolled in this prospective study from July 2008 to June 2012 in Shantou Central Hospital, and divided into prevertebral route group(85 cases) and retrosternal route group(82 cases) according to the random number table method. Quality of life questionnaire was investigated 1, 3, 6, 9, and 12 months after operation respectively.

RESULTSThe incidence of anastomotic stenosis was lower in the prevertebral route group (P<0.05). However, the differences in perioperative general conditions between the two groups were not statistically significant(all P>0.05). One hundred and forty-nine patients completed the postoperative quality of life questionnaire. Dysphagia and swallowing retching symptom were better, while acid reflux and heartburn symptom were more serious in prevertebral route group as compared to retrosternal route group(all P<0.05). Overall quality of life score difference between the two groups was not statistically significant(P>0.05).

CONCLUSIONSFor digestive tract reconstruction after resection of esophageal cancer, tubular gastroesophagostomy by prevertebral or retrosternal route both can obtain better quality of life after surgery. Swallowing function after surgery of the former is superior to the latter, but the reflux symptoms is more serious. Therefore the two mehods have their own advantages and disadvantages, and the choice of route should be depended on clinical experience and patient condition.

Deglutition Disorders ; Digestive System Surgical Procedures ; Esophageal Neoplasms ; Esophagectomy ; Gastrectomy ; Humans ; Postoperative Period ; Prospective Studies ; Quality of Life ; Reconstructive Surgical Procedures

BACKGROUNDIncomplete right bundle branch block (ICRBBB) is commonly associated with atrial septal defect (ASD), but lacks sufficient diagnostic test characteristics. An abnormal T wave is also often observed in ASD, with horizontal or inverted displacement of the proximal T wave limb in the right precordial leads, termed "defective T wave" (DTW).

METHODSWe examined the diagnostic test characteristics of combining ICRBBB with DTW as a new index to diagnose ASD. A total of 132 consecutive patients with ASD and 132 cases of age/gender-matched controls without ASD were enrolled.

RESULTSSensitivities of DTW, ICRBBB, and both were 87.1% - 87.9%. Specificities were 97.0%, 96.2%, and 100%, respectively. Positive predictive values were 1.3%, 1.1%, and 100.0% respectively, while negative predictive values were 99.9% for each.

CONCLUSIONCombining ICRBBB with DTW in electrocardiogram (ECG) as a new index significantly increased the specificity and positive predictive values while maintaining a high sensitivity in diagnosing ASD.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Bundle-Branch Block ; diagnosis ; physiopathology ; Child ; Child, Preschool ; Electrocardiography ; Female ; Heart Septal Defects, Atrial ; diagnosis ; Humans ; Male ; Middle Aged ; Predictive Value of Tests ; Sensitivity and Specificity

Laser induced breakdown spectroscopy ( LIBS ) was proposed to rapidly discriminate microbe species. Ten species of microbes were prepared in lab. Filter papers were selected as substrate for enriching bacteria and enhancing the quality of LIBS. The images of plasma were collected by ICCD camera and LIBS spectra were obtained by spectrometers. The results displayed that the images and spectra were different from 10 bacteria. It was demonstrated that this method was feasible to discriminate bacteria species by analyzing image and/or spectroscopy. Furthermore, nine smooth and multiple scattering correction ( MSC) were utilized to preprocess the LIBS full-spectrum data in the wavelength range of 200-420 nm and 560-680 nm. And principal component analysis ( PCA) and PCA-RF ( Random forest) were compared to validate the accuracy of discrimination. The investigation showed that the PCA-RF model coupled with suitable methods in preprocessing data could identify bacteria. The accuracy was 99. 6% for ten species of microbes by evaluating LIBS spectra in training set, and 96. 7% in predicting set. This report indicated that it is feasible to differentiate bacteria species by analyzing LIBS spectra.

Objective:To understand the epidemiological characteristics of human respiratory syncytial virus (HRSV) among acute respiratory infection (ARI) cases in 16 provinces of China from 2009 to 2023.Methods:The data of this study were collected from the ARI surveillance data from 16 provinces in China from 2009 to 2023, with a total of 28 278 ARI cases included in the study. The clinical specimens from ARI cases were screened for HRSV nucleic acid from 2009 to 2023, and differences in virus detection rates among cases of different age groups, regions, and months were analyzed.Results:A total of 28 278 ARI cases were enrolled from January 2009 to September 2023. The age of the cases ranged from<1 month to 112 years, and the age M ( Q1, Q3) was 3 years (1 year, 9 years). Among them, 3 062 cases were positive for HRSV nucleic acid, with a total detection rate of 10.83%. From 2009 to 2019, the detection rate of HRSV was 9.33%, and the virus was mainly prevalent in winter and spring. During the Corona Virus Disease 2019 (COVID-19) pandemic, the detection rate of HRSV fluctuated between 6.32% and 18.67%. There was no traditional winter epidemic peak of HRSV from the end of 2022 to the beginning of 2023, and an anti-seasonal epidemic of HRSV occurred from April to May 2023. About 87.95% (2 693/3 062) of positive cases were children under 5 years old, and the difference in the detection rate of HRSV among different age groups was statistically significant ( P<0.001), showing a decreasing trend of HRSV detection rate with the increase of age ( P<0.001). Among them, the HRSV detection rate (25.69%) was highest in children under 6 months. Compared with 2009-2019, the ranking of HRSV detection rates in different age groups changed from high to low between 2020 and 2023, with the age M (Q1, Q3) of HRSV positive cases increasing from 1 year (6 months, 3 years) to 2 years (11 months, 3 years). Conclusion:Through 15 years of continuous HRSV surveillance analysis, children under 5 years old, especially infants under 6 months old, are the main high-risk population for HRSV infection. During the COVID-19 pandemic, the prevalence and patterns of HRSV in China have changed.

Objective:To understand the epidemiological characteristics of human respiratory syncytial virus (HRSV) among acute respiratory infection (ARI) cases in 16 provinces of China from 2009 to 2023.Methods:The data of this study were collected from the ARI surveillance data from 16 provinces in China from 2009 to 2023, with a total of 28 278 ARI cases included in the study. The clinical specimens from ARI cases were screened for HRSV nucleic acid from 2009 to 2023, and differences in virus detection rates among cases of different age groups, regions, and months were analyzed.Results:A total of 28 278 ARI cases were enrolled from January 2009 to September 2023. The age of the cases ranged from<1 month to 112 years, and the age M ( Q1, Q3) was 3 years (1 year, 9 years). Among them, 3 062 cases were positive for HRSV nucleic acid, with a total detection rate of 10.83%. From 2009 to 2019, the detection rate of HRSV was 9.33%, and the virus was mainly prevalent in winter and spring. During the Corona Virus Disease 2019 (COVID-19) pandemic, the detection rate of HRSV fluctuated between 6.32% and 18.67%. There was no traditional winter epidemic peak of HRSV from the end of 2022 to the beginning of 2023, and an anti-seasonal epidemic of HRSV occurred from April to May 2023. About 87.95% (2 693/3 062) of positive cases were children under 5 years old, and the difference in the detection rate of HRSV among different age groups was statistically significant ( P<0.001), showing a decreasing trend of HRSV detection rate with the increase of age ( P<0.001). Among them, the HRSV detection rate (25.69%) was highest in children under 6 months. Compared with 2009-2019, the ranking of HRSV detection rates in different age groups changed from high to low between 2020 and 2023, with the age M (Q1, Q3) of HRSV positive cases increasing from 1 year (6 months, 3 years) to 2 years (11 months, 3 years). Conclusion:Through 15 years of continuous HRSV surveillance analysis, children under 5 years old, especially infants under 6 months old, are the main high-risk population for HRSV infection. During the COVID-19 pandemic, the prevalence and patterns of HRSV in China have changed.

OBJECTIVETo provide evidence-based recommendations for clinical application and provoke thoughts for future researchers by conducting a comprehensive summary and evaluation of the current evidence profile for the role of Chinese medicine (CM) in treating myocardial infarction (MI).

METHODSOnline databases including PubMed, EMBase, Cochrane Library, Chinese National Knowledge Infrastructure (CNKI), Chinese Biomedical Medicine (CBM), VIP Journal Integration Platform, and Wanfang database were systematically searched for literatures on CM in treating MI. After screening, studies were categorized into 5 types, i.e. systematic review (SR), randomized controlled trial (RCT), observational study, case report and basic research. General information was abstracted, and the quality levels of these studies and their conclusions were summarized and assessed.

RESULTSA total of 452 studies including 10 SRs, 123 RCTs, 47 observational studies, 28 case reports, and 244 basic researches were selected. Clinical studies centered primarily on herbal decoction and mostly were not rigorously performed. High-quality studies were predominantly on Chinese patent medicines (CPMs) such as Danshen Injection (), Shenmai Injection (), Shengmai Injection () and Qishen Yiqi Dripping Pills (). The most frequently observed pattern of drug combination was decoction plus injection. Results of SRs and clinical studies showed that CM may reduce mortality, decrease risk of complication, reduce myocardial injury, improve cardiac function and inhibit ventricular remodeling. Findings from basic researches also supported the positive role of CM in reducing infarct size and myocardial injury, promoting angiogenesis, preventing ventricular remodeling and improving cardiac function. According to the current evidence body, CM has proven effects in the prevention and treatment of MI. It is also found that the effects of CPMs vary with indications. For instance, Shenmai Injection has been found to be especially effective for reducing the incidence of acute clinical events, while CPMs with qi-nourishing and bloodcirculating properties have been proven to be effective in inhibiting ventricular remodeling. High quality evidence supports the use of CM injection for acute MI and CPM for secondary prevention. Reports on adverse events and other safety outcomes associated with CM for MI are scarce.

CONCLUSIONSSufficient evidence supported the use of CM as an adjuvant to Western medicine for preventing and treating MI. The choice of drug use varies with disease stage and treatment objective. However, the quality of the evidence body remains to be enhanced.