BACKGROUND: The gold nanoparticles have a killing effect on tumor cells.OBJECTIVE: To investigate the influence of gold nanochain on Hep-2 cells proliferation of human laryngeal carcinoma.METHODS: The gold nanochain was prepared by a glucose synthesis method and added into the culture cells with different concentrations (10%, 25%, 50%, 75%, 95%) to test the influence on proliferation of in vitro cultured Hep-2 cells. The endocytosis and exocytosis of transmembrane when gold nanochain attached to Hep-2 cells were observed by electron microscopy.RESULTS AND CONCLUSION: The gold chain at high concentrations (75%, 95%) exhibited inhibitory effects on the proliferation of Hep-2 cells, but the influence was not increased with increasing concentration, belonging to a range of non-toxic. Gold nanchain can enter into Hep-2 cells after 8 hours of co-culture and leave cells after 48 hours, indicating gold nanoparticles chain can enter and leave Hep-2 freely.

OBJECTIVE:To establish a method for content determination of steroidal saponin in Allium sativum. METHODS:Pre-column derivatization of steroidal saponin was performed by using the derivatization agent of nitro-benzoic acid-chlorine. And HPLC was conducted to determine the content of steroidal saponin. The column was Shimadzu VP-ODS with mobile phase of aceto-nitrile-water mixed solution(80:20,V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 254 nm,the column temper-ature was 25 ℃,and the injection volume of 20 μl. RESULTS:The linear rang of sarsasapogenin was 0-1.25 mg/ml(r=0.999 0);RSDs of precision,stability and reproducibility tests were lower than 2%;recovery was 93.1%-96.8%(RSD=1.56%,n=6). CON-CLUSIONS:The method is simple,stable with good separation,and can be use for the content determination of steroidal saponin in A. sativum.

OBJECTIVE: This study aimed to analyze the expression of epidermal growth factor receptor (EGFR), Ki67 and p16 in human middle ear cholesteatomas and to investigate the correlation between its expression and the ability of erosion of cholesteatoma. METHOD: The specimens from the acquired middle ear cholesteatoma tissue of 30 cases and 21 external ear canal skin samples from patients and 17 external ear canal skin samples from healthful men were taken intraoperatively. Their expression was examined by immunohistochemical SP method. Then we scanned it into a computer by an image scanner and quantified the gray of them using commercial software. RESULT: The percent of positive expression of EGFR, Ki67 and p16 in middle ear cholesteatoma were 70.0%, 60.0%, 46.7%. Their expression tended to the increased greatly compared with the skins of the control groups. There was not correlation between the expression of EGFR, Ki67 and p16 (P > 0.05). It showed statistically significant correlation between expression of EGFR and the ability of erosion of middle ear cholesteatoma (P < 0.01). There was correlation between the expression of Ki67 and the ability of erosion of middle ear cholesteatoma too (P < 0.01). But there was not correlation between the expression of p16 and the ability of erosion of middle ear cholesteatoma (P > 0.05). The expression of EGFR, Ki67, p16 in all epithelial layers of middle ear cholesteatoma were abundantly stained, especially in the basal and spinous layers. Only the basal layer were slightly stained in control groups. CONCLUSION The expression of EGFR, Ki67, p16 in middle ear cholesteatoma was significantly high-er compared with the skin of external auditory of cholesteatoma patients and healthful peoples. There was correlation between the expression of EGFR or Ki67 and the ability of erosion of middle ear cholesteatoma. It means that EGFR, Ki67 and p16 play a key role in the hyperproliferation middle ear cholesteatoma.
Adolescent ; Adult ; Aged ; Case-Control Studies ; Cholesteatoma, Middle Ear ; metabolism ; Cyclin-Dependent Kinase Inhibitor p16 ; metabolism ; ErbB Receptors ; metabolism ; Female ; Humans ; Ki-67 Antigen ; metabolism ; Male ; Middle Aged ; Young Adult

OBJECTIVE: To identify the newborns who should receive hearing evaluation by hearing screening in high risk newborns; to find and confirm the high risk factors of hearing disorders in high risk newborns. METHOD: The first screening was performed by DPOAE. Newborns did not passed the first screening undertook second screening using DPOAE + ABR. and newborns did not passed the second screening received hearing evaluation. High risk factors of hearing loss were found by Logistic regression analysis. RESULT: Three hundred and twenty-seven cases were screened. The positive ratio in first screening was 37.0%. The positive ratio in second screening was 11.0%. Ten cases were diagnosed as hearing loss and the incidence of hearing loss was 3.39%. High risk factors of hearing loss were asphyxiation, very low born weight (<1,500 g) and head and neck abnormality. CONCLUSION (1) DPOAE combined with ABR is credible and feasible in hearing screening of high risk newborns. (2) High risk factors of hearing loss were asphyxiation, very low born weight (<1,500 g) and head and neck abnormality in this study.
Female ; Hearing Disorders ; diagnosis ; epidemiology ; prevention & control ; Hearing Loss ; diagnosis ; epidemiology ; prevention & control ; Hearing Tests ; Humans ; Incidence ; Infant, Newborn ; Male ; Neonatal Screening ; Risk Factors

Objective:To understand the status quo and impact of Beijing Standardized Residency Training program following three years of the medical education synergy policy from the perspective of residents.Methods:Online questionnaire was used from April to May 2018 to investigate two types of residents who had completed the program in Beijing in 2018, and a comparison was made with the 2014 training program, activities, evaluation, and support conditions. Statistical descriptions and Wilcoxon signed-rank test were used for analysis.Results:A total of 3 293 residents completed the Beijing Standardized Residency Training, of which 54.75% were resident physicians, and 45.25% were graduate students in clinical medicine. Compared with 2014, the completion rate of the disease types and quantity, clinical operation types and quantity required by the training plan has been significantly improved, with the proportions being 93.77% and 92.80%, respectively. The implementation rate of examinations in 7 departments including Internal Medicine was greater than 90%, which is significantly higher than that in 2014; The conditions for training support had improved significantly.Conclusions:The impact of Beijing Standardized Residency Training Program was already emerging since the medical education synergy policy in place. It was recommended that various measures be taken to steadily improve the quality of the " dual-track system" .

Objective:To investigate the relationship between the E2 and E4 alleles of apolipoprotein E (apoE) gene and myocardial infarction (MI) in type 2 diabetes Mellitus (T2DM) patients, and to explore the relationship between apoE polymorphism and blood lipid metabolism.Methods:This case control study was conducted from August 2016 to March 2020 in China-Japan Friendship Hospital, 3 459 inpatients with T2DM were included including 3 044 patients without MI (T2DM group) and 415 patients with MI (T2DM+MI group). Real time fluorescent quantitative PCR was used to detect apoE polymorphism. Automatic biochemical analyzer was used to detect lipid levels. Logistic regression analyses were performed to determine the association of apoE with risk of MI in patients with T2DM.Results:(1) The frequency of E4 allele in T2DM+MI group (12.29%, 102/830) was significantly higher than in T2DM group (9.13%,556/6 088), while the frequency of E2 allele in T2DM+MI group (7.35%,61/830) was significantly lower than that in T2DM group (8.21%,500/6 088), P=0.012. Logistic regression analyses showed that E4 allele carrier (E3/E4+E4/E4) faced a higher risk for MI in T2DM patients ( OR=1.48, 95% CI 1.14-1.92, P=0.003), while E2 allele carrier(E2/E3+E2/E2)did not face a higher risk of MI in T2DM patients ( OR=0.88, P=0.642). (2) The levels of apoE polymorphism and blood lipid: The levels of TC, LDL-C and apoB increased in the order of E4 allele, wild type and E2 allele ( P<0.05). The levels of HDL-C, apoA1 and apoE decreased in the order of E4 allele, Wild type and E2 allele ( P<0.05). Conclusion:The E4 allele is a risk factor for MI in T2DM patients, and apoE polymorphism can affect blood lipid level in this patent cohort.

Objective:To explore the effect on cardiopulmonary function of early rehabilitation after lung transplantation.Methods:Forty patients undergoing lung transplantation were randomly divided into an observation group and a control group, each of 20. Both groups received routine rehabilitation treatment, psychological counseling and health education about rehabilitation, medications and nutrition. The observation group was additionally given systematic early lung rehabilitation treatment as soon as their vital signs were stable after the operation. It included body position transfers, aerobic training, resistance training and breathing training 3 to 5 times a week for 4 weeks supervised by physical therapists. The control group were informed about methods of aerobic training, respiratory training and airway clearance but carried them out by themselves. The percentage of forced expiratory volume (FVC%), FVC in the first second (FEV1%, ) and FEV1%/ FVC% of the two groups were evaluated using a bedside lung function instrument before the lung transplantation and after 4 weeks of treatment. The six-minute walking distances (6MWDs) of the two groups were compared and their facility in the activities of daily living was evaluated using the modified Barthel index (MBI).Results:Before treatment, there was no significant difference in the average FEV1%, FVC%, FEV1%/FVC%, 6MWD or MBI ratings between the two groups. After the 4 weeks of treatment, both groups showed significant improvement in all of those measurements, on average. The observation group′s averages were, however, significantly better than those of the control group.Conclusion:Early rehabilitation after lung transplantation helps to improve cardiopulmonary function and promote a better quality of life.