Objective To explore the inhibition effects of epidermal growth factor receptor (EGFR) antagonist monoclonal antibody cetuximab (C225) on breast cancer stem cells in human breast cancer cell line MCF-7.Methods The effects of C225 on the proliferation of breast cancer cell line MCF-7 were detected by MTT assay. MCF-7 cells were cultured to generate primary mammospheres, and were divided into control group, C225 group, epidermal growth factor (EGF) group and EGF + C225 group according to whether or not the culture media contained exogenous EGF and C225.Thirteen days after culture, the volume and number of mammospheres of these four groups were observed, and mammosphere-forming efficiency ( MFE) was calculated. The percentages of CD44~+ CD24~- cells in mammospheres of these four groups and in routinely cultured MCF-7 cells were determined by flow cytometry. Results The inhibition rate on MCF-7 cells increased with the concentration of C225.Compared with control group, the volume of mammospheres in C225 group significantly decreased, and MFE and percentages of CD44~+ CD24~- cells in mammospheres significantly decreased [(0.61 ±0.04)% vs (1.44±0.09)%, P<0.01; (3.50±0.29)% vs (9.07 ±0.52) % , P<0.01]. Compared with EGF group, the volume of mammospheres in EGF + C225 group significantly decreased, and MFE and percentages of CD44~+ CD24~- cells in mammospheres significantly decreased [ (0.68 ± 0.04) % vs (1.61 ± 0.05) % , P < 0.01; (4.00 ± 0.58) % vs (10.47 ± 0.79) % , P < 0.01]. The percentage of CD44~+ CD24~- cells in routinely cultured MCF-7 cells was (2.03 ±0.15) % , and was significantly different from those in EGF group and control group (P < 0.01). There was no significant difference in volume of mammospheres, MFE and percentage of CD44~+ CD24~- cells in mammospheres between EGF group and control group (P >0.05). Conclusion C225 has significant inhibition effects on CD44~+ CD24~- cells in MCF cells.

Objective To evaluate the role of 64-slice spiral CT with diphase dynamic scanning in predicting the T staging of gas-tric carcinoma in different locations and assessing the sensitivity of metastasis of lymph nodes.Methods 185 patients with gastric carcinoma proved by pathology underwent diphase 64-slice CT scan and performed a TNM staging according to UICC classification. The results were compared with surgical pathological findings.Results The detection sensitivity for earlier stage gastric carcinoma was 92.0% and 99.4% for the advanced stage gastric carcinoma,While the overall accuracy rates of T and N staging were 85.4%, 69.2% respectively.Compared with the pathologic findings,the accuracy rate of CT scan for T1,T2,T3,T4 staging was 72.0%, 69.6%,90.8% and 83.3% respectively.The differences were statistically significant between T1 and T3,T2 and T3.The accuracy rate of T staging was 86.0%,84.8% respectively when the lesions were located in cardia and in antrum and this difference was not statistically significant.When the lesions were located in the body of the stomach,the differences were also not statistically signifi-cant with the accuracy rate of T staging was 89.5%,86.4% ,87.2% respectively for the lateral wall of the lesser curvature,the posterior wall of the lesser curvature and both the lesser curvature and larger curvature involved.As for the N staging,The accuracy rate of N0,N1,N2,N3 was 54.3%,87.5%,68.1% and 53.6%.The differences were significant statistically between N0 and N1, N1 and N3.Conclusion There was a high accuracy in the preoperative TNM staging of the gastric carcinoma with 64-slice spiral CT. The accuracy rate of T staging of the gastric carcinoma is not relative to the lesion’s location.

Objective To express and purify the glycoprotein extracellular domain (Ex-GP) of Rabies virus strain CTN in soluble form with high efficiency.Methods A recombinant expression plasmid containing the gene encoding the Ex-GP was constructed.Various expression conditions were screened to obtain an optimum prokaryotic expression system for Ex-GP in soluble form.The expressed target protein was purified using affinity chromatography and gel filtration chromatography.Results The target protein Ex-GP with high antigenicity was efficiently expressed in soluble form by using the recombinant PBCX expression system and effectively purified by using affinity and gel filtration chromatography.Conclusion The soluble form of Ex-GP is successfully expressed and purified in a simple and convenient way.This study paves the way for further researches on the biological functions of rabies virus glycoprotein,the pathogenic mechanism of rabies and the development of diagnostic reagent and vaccines for rabies virus.

Objective To explore the correlation between pregnancy-related anxiety and serum 25 (OH)D level during early pregnancy. Methods A radioimmunoassay was used to determine the serum 25 (OH)D levels of 2 122 early pregnant women in Maanshan Maternal and Child Health Care Hospital, from June 2015 to 2016. Data were collected using a questionnaire. Results The mean serum 25(OH)D level was(29.71±32.27)nmol/L.About 15.2% of the subjects had adequate,22.6% had insufficient,45.1% had deficient,and 17.1% had severely deficient serum 25(OH)D levels.The type of housing and testing seasons were significantly associated with the serum 25(OH)D level.Single factor logistic regression analysis results show that pregnancy-related anxiety incidence in the group deficient in 25(OH)D was higher than that in the adequate group, which has a statistically significant difference (P<0.05). After adjusting for the maternal age,BMI,and educational level,multivariate logistic regression analysis results showed that the difference was statistically significant. Conclusion The serum 25(OH)D level in early pregnant women was inadequate. Furthermore, lack of serum 25(OH)D in early pregnancy and pregnancy-related anxiety were negatively correlated.

Objective To understand the physical activity of early stage pregnant women and explore its influential factors. Methods From June 2015 to June 2016, 2122 pregnant women with early pregnancy card in Ma An Shan Maternal and Child Health Hospital were selected and surveyed with a questionnaire. The Physical Activity Questionnaire was used to understand the physical activity of pregnant women in their early pregnancy. Analysis of variance and t-test were used to describe the distribution of energy expenditures of physical activity of pregnant women with different demographic characteristics, and multiple linear regression analysis was used to analyze the factors influencing the energy expenditure of their physical activity. Result The duration of activities of sleep and sitting type was (16.56 ± 3.54) h, accounting for 83.38％of total activity time;the energy consumption value was (17.17±5.59) METs·h;mild physical activity time was (2.62±1.86) h, accounting for total time. 13.19％and the energy consumption value was (6.06±4.43) METs·h;the average time of moderate to severe physical activity was (0.68±0.93) h, accounting for 3.42％of total physical activity time, and the energy consumption value was (3.22±4.58) METs·h. In the univariate analysis, the energy expenditures of physical activity between the different groups (t=-3.551), education level (F=1.347), and occupation type (F=1.485) were different, and the difference was statistically significant (P<0.05). In multiple linear regression analysis, different occupational types and education were the energy expenditure levels of physical activity during early pregnancy. Influencing factors (P<0.05). Conclusion Pregnant women have longer periods of sleep and meditation during the first trimester, and shorter duration of physical activity than mild and above;the energy expenditure of physical activity during the first trimester of pregnancy is affected by the occupational type and educational level of the pregnant woman.

Objective:To explore the establishment and assessment of the depression model of adult SD rats induced by early maternal infant separation stress combined with adult chronic unpredictable mild stress(CUMS), and to observe the behavior and synaptic protein expression of SD rats.Methods:Twenty-four male rats were randomly divided into three groups: control group (CON group), chronic unpredictable stress group (CUMS group), maternal infant separation combined with chronic unpredictable stress group (MS + CUMS group). The depression model of rats in cums group was established by CUMS, and the depression model of rats in MS + CUMS group was established by maternal infant separation + CUMS. The depression model was evaluated by body mass and appearance observation, sugar water preference experiment, open field test and forced swimming test.Synapse-associated proteins (PSD-95 and synaptophysin (Syn)) of the hippocampus were assayed using Western blot. Syn protein expression was measured by immunohistochemistry.Results:After modeling, compared with CON group, the rats in CUMS group and MS + CUMS group had significantly lower body mass((126.43±3.88) g, (91.04±3.85) g, (69.89±6.67) g; t=5.03, 8.03, both P<0.01), significantly lower sugar water preference((94.21±0.56)%, (79.30±1.13)%, (72.73±1.82)%; t=8.24, 11.87, both P<0.01) and significantly increased immobility time((3.50±0.84)s, (13.59±2.40)s, (15.70±2.97)s; t=3.16, 3.82, both P<0.01). Among them, the body mass and sugar water preference of MS + CUMS group were lower than those of CUMS group ( t=3.00, 3.63; both P<0.01). (2)The center time of the rats in MS+ CUMS group markedly reduced compared with that of CON group((21.41±4.65) s, (8.96±2.37) s; t=2.66, P<0.05). (3)In the immunohistochemistry experiment, compared with the CON group, the percentage of Syn positive area in hippocampus of rats in CUMS group and MS+ CUMS group decreased significantly ((24.42±0.76)%, (14.00±0.95)%, (10.38±1.38)%; t=6.93, 9.33, P<0.01). (4)The results of Western blot showed that compared with CON group, both the expression of PSD-95 ((1.18±0.02), (0.74±0.06), (0.52±0.05), t=6.29, 9.31; both P<0.05) and Syn ((1.12±0.08), (0.95±0.06), (0.90±0.07); t=3.10, 4.04; both P<0.05) in hippocampus of rats in CUMS group and MS+ CUMS group were significantly decreased.And compared with the CUMS group, the expression of PSD-95 in MS+ CUMS group was lower( t=0.93, P<0.05). Conclusion:The method of MS combined with CUMS can effectively induce depression like behavior and decrease the expression of synaptic plasticity related protein of hippocampus in rats.

Cervical spondylosis is due to degenerative cervical disc and its stimulation or oppression of the adjacent nerves, spinal cord, spinal artery and other tissue caused by clinical symptoms. The cervical spine is an anatomical structure with activity, while the pillow has a certain plastic fixation effect on the cervical spine anatomy. Therefore, the pillow not only plays a health role in the cervical spine, but also plays an important role in restoring the normal physiological curvature of the cervical spine. Based on this, a multi-functional cervical vertebra treatment pillow is designed, which not only has the functions of traction, maintaining different positions of the cervical spine, correcting the cervical curvature and equipment exercises, but also has the functions of voice broadcast and network data terminal.

Objective:To analyze the serum anti-Müllerian hormone (AMH) levels in women of childbearing age in different age groups in Henan, and establish the medical reference intervals based on measurement results from this population.Methods:From January to June 2017, 620 healthy women of childbearing age (20-34 years old), who underwent pre-pregnancy eugenics and pre-marital checkups in 13 project sites in Henan, were included in this study. Participants were divided into 3 age groups: 20-24 years group ( n=210), 25-29 years group ( n=207), and 30-34 years group ( n=203). Spearman correlation coefficient was used to evaluate the correlation between serum AMH level and age; Kruskal-Wallis H test was used to compare the serum AMH levels of different age groups; Wilcoxon test was used for comparison between pairs; the percentile method ( P2.5, P97.5) was used to establish medical reference interval of serum AMH in women of childbearing age for the whole population and different age groups, respectively. Results:The correlation coefficient between serum AMH and age in women of childbearing age (20-34 years old) is -0.17 ( P<0.001). There was a statistically significant difference in the overall frequency distribution of serum AMH levels among the three different age groups ( H=21.978, P<0.05). Among them, there is a statistically significant difference between the 20-24 years group and the 30-34 years group ( Z=4.292, P<0.05). There is a statistically significant difference between the 25-29 years group and the 30-34 years group ( Z=3.803, P<0.05). The reference range of serum AMH is 0.281-9.693 μg/L in this cohort; the reference range of serum AMH is 0.524-10.760, 0.229-9.200, 0.115-8.200 μg/L for women of childbearing age at 20-24, 25-29 and 30-34 years, respectively. Conclusion:The serum AMH level of women of childbearing age (20-34 years old) decreases with age. It is of great significance to establish the serum AMH reference interval for women of childbearing age in different age groups in Henan.