Objective:To explore the effects of polymorphic typing of methylenetetrahydrofolate reductase (MTHFR) and serum levels of homocysteine (Hcy) on spontaneous abortion in early pregnancy in patients with polycystic ovary syndrome (PCOS).Methods:PCOS women, treated in Dalian Women and Children′s Medical Center (Group) from January 2022 to January 2024 were included in the study. One hundred patients with previous spontaneous abortion in early pregnancy were selected as the observation group (abortion group), and 72 patients with one successful pregnancy were delivered as the control group. The difference between gene polymorphism and serum Hcy levels at the C677T locus of MTHFR gene between the two groups, and serum Hcy level with the occurrence of spontaneous abortion in PCOS patients.Results:The serum Hcy level was higher in the PCOS abortion group than in the control group: 14.70 (12.20, 18.75) μmol/L vs. 9.60 (7.62, 10.80) μmol/L, with a statistically significant difference ( P<0.05). Between the abortion and control groups, genotype CC: 23.00% (23/100) vs. 44.44% (32/72), CT: 49.00% (49/100) vs. 31.94% (23/72), TT: 28% (28/100) vs. 23.61% (17/72) ( χ2 = 9.24, P = 0.010). Genotype CT, genotype TT and allele T were all risk factors for spontaneous abortion in early pregnancy in PCOS patients. The Hcy level of each genotype in the abortion group was significantly higher than that of the control group, all statistically significant ( P<0.05), and alleles C and T had similar results ( P<0.01). There was a trend towards gradually increasing Hcy levels for the three genotypes in the same group (CC

Objective:To explore the effects of polymorphic typing of methylenetetrahydrofolate reductase (MTHFR) and serum levels of homocysteine (Hcy) on spontaneous abortion in early pregnancy in patients with polycystic ovary syndrome (PCOS).Methods:PCOS women, treated in Dalian Women and Children′s Medical Center (Group) from January 2022 to January 2024 were included in the study. One hundred patients with previous spontaneous abortion in early pregnancy were selected as the observation group (abortion group), and 72 patients with one successful pregnancy were delivered as the control group. The difference between gene polymorphism and serum Hcy levels at the C677T locus of MTHFR gene between the two groups, and serum Hcy level with the occurrence of spontaneous abortion in PCOS patients.Results:The serum Hcy level was higher in the PCOS abortion group than in the control group: 14.70 (12.20, 18.75) μmol/L vs. 9.60 (7.62, 10.80) μmol/L, with a statistically significant difference ( P<0.05). Between the abortion and control groups, genotype CC: 23.00% (23/100) vs. 44.44% (32/72), CT: 49.00% (49/100) vs. 31.94% (23/72), TT: 28% (28/100) vs. 23.61% (17/72) ( χ2 = 9.24, P = 0.010). Genotype CT, genotype TT and allele T were all risk factors for spontaneous abortion in early pregnancy in PCOS patients. The Hcy level of each genotype in the abortion group was significantly higher than that of the control group, all statistically significant ( P<0.05), and alleles C and T had similar results ( P<0.01). There was a trend towards gradually increasing Hcy levels for the three genotypes in the same group (CC

Abstract Allergic diseases can occur in all systems of the body, covering the whole life cycle, from children to adults and to old age, can be lifelong onset and even fatal in severe cases. Children account for the largest proportion of the victims of allergic disease, Children s allergies start from scratch, ranging from mild to severe, from less to more, from single to multiple systems and systemic performance, so the prevention and treatment of allergic diseases in children is of great importance, which can not only prevent high risk allergic conditions from developing into allergic diseases, but also further block the process of allergy. At present, there is no consensus on the management system of allergic children in kindergartens and primary schools. The "Consensus on Allergy Management and Prevention in Kindergartens and Primary Schools", which includes the organizational structure, system construction and management of allergic children, provides evidence informed recommendations for the long term comprehensive management of allergic children in kindergartens and primary schools, and provides a basis for the establishment of the prevention system for allergic children.

OBJECTIVE: To explore the effect of occupational lead exposure on the relative telomere length(RTL) and mRNA expression of telomere-binding protein POT1-interacting protein 1(TPP1) in peripheral blood of workers. METHODS: A total of 303 workers exposed to lead were selected as the exposure group and 72 administrative logisticians personnel in the same factory as the control group using the simple random sampling method. Their peripheral blood samples were collected and were used to detect the blood lead level by Graphite furnace atomic absorption spectrometry. RTL and the relative expression of TPP1 mRNA by real-time quantitative polymerase chain reaction. RESULTS: The blood lead level of the exposure group was higher [Media(M): 68.2 vs 266.1 μg/L, P<0.01], the RTL was shorter(M: 0.96 vs 0.70, P<0.01), and the relative mRNA expression of TPP1 was lower(M: 0.92 vs 0.51, P<0.01) compared with the control group. Spearman correlation analysis results showed that the blood lead level were both negatively correlated with RTL [Spearman correlation coefficient(r_S) =-0.18, P<0.01], and the relative mRNA expression of TPP1(r_S=-0.19, P<0.01), while the RTL was positively correlated with the risk of RTL shortening and the relative mRNA expression of TPP1 decline was increased in lead exposure(P<0.01). CONCLUSION: Lead exposure can shorten the RTL and reduce the relative mRNA expression of TPP1 in workers. The mechanism may be that lead interferes with telomere repair process by inhibiting the mRNA expression of TPP1.

During these missions, long-time maritime operations impose physical and psychological challenges to the officers and sailors, leading to more mental illness. At present, there is no systematic mental health work plan aimed at those problems of the officers and sailors on long oceangoing missions. Therefore, based on the experience and lessons gained from previous long oceangoing missions and the specific psychological status of the crew at different legs of long oceangoing missions, this paper elaborated the self-capability preparation of mental health providers, summarized the organization and implementation of mental health service throughout the whole mission, and presented a preliminary working outline of mental health service for the officers and sailors on long oceangoing missions, so as to guide the mental health providers to carry out their work effectively, thus improving the mental health of the officers and sailors on long oceangoing missions.

During these missions, long-time maritime operations impose physical and psychological challenges to the officers and sailors, leading to more mental illness. At present, there is no systematic mental health work plan aimed at those problems of the officers and sailors on long oceangoing missions. Therefore, based on the experience and lessons gained from previous long oceangoing missions and the specific psychological status of the crew at different legs of long oceangoing missions, this paper elaborated the self-capability preparation of mental health providers, summarized the organization and implementation of mental health service throughout the whole mission, and presented a preliminary working outline of mental health service for the officers and sailors on long oceangoing missions, so as to guide the mental health providers to carry out their work effectively, thus improving the mental health of the officers and sailors on long oceangoing missions.

Objective To explore the protective effect of aucubin on the photoageing of the skin that induced by ultraviolet (UVB) radiation. Methods Human skin fibroblasts were divided into normal group, model group and high, medium and low dose groups of apocynin by random method. Except the normal group, the other groups of cells were subjected to UVB radiation with a radiation wavelength of 311 nm, irradiation intensity of 9.00 mw/cm2, radiation time of 2.8 s, radiation dose of 25 mJ/cm2. The cells in the high, medium and low doses of aglycone were cultured for 24 h at an equal volume of 400, 200, 100 μg/ml, and then subjected to UVB irradiation, and then cultured for 24 h. The normal group and the model group were cultured for 48 h in a common medium. The apoptosis rate of each group was detected by flow cytometry. The levels of IL-1, IL-6 and TNF-α in each group were detected by ELISA. The expressions of Bax and Bcl-2 mRNA in each group were detected by RT-PCR. Results Compared with the model group, the apoptosis rate (4.84% ± 0.24%, 12.32% ± 0.67% vs. 35.63% ± 2.77%) in the medium and high dose group significantly decreased (P<0.05), the content of IL-1 (21.14 ± 1.94 ng/ml, 16.17 ± 0.74 ng/ml vs. 22.55 ± 1.02 ng/ml), IL-6 (17.46 ± 0.93 ng/ml, 14.51 ± 0.79 ng/ml vs. 18.39 ± 2.05 ng/ml), TNF-α (44.21 ± 1.16 ng/ml, 35.94 ± 3.08 ng/ml vs. 45.67 ± 2.28 ng/ml) significantly increased (P<0.05). Compared with the model group, the expression of Bax mRNA (0.29 ± 0.05, 0.42 ± 0.05, 0.51 ± 0.04 vs. 0.59 ± 0.05) significantly decreased, and the expression of Bcl-2 mRNA (0.52 ± 0.04, 0.44 ± 0.03, 0.35 ± 0.03 vs. 0.26 ± 0.04) significantly increased (P<0.05). Conclusions The aucubin has protective function to the damage of skin fibroblasts which is induced by UVB radiation, indicating the protective function of decreasing Bax mRNA expression, increasing Bcl-2 mRNA expression, reducing the expression of inflammatory factor IL-1, IL-6, TNF-α, holding-up the cell apoptosis which is induced by UVB radiation, and inhibiting apoptosis of cell that caused by UVB radiation, playing an role of protective fibroblasts for delay of the photoageing.

Objective: To compare the clinical efficacy and safety of bortezomib, cyclophosphamide, dexamethasone (VCD) regimen and bortezomib dexamethasone (VD) regimen in the treatment of the patients with newly diagnosed multiple myeloma (NDMM). Methods: The clinical data of 73 patients with NDMM in Shanxi Dayi Hospital from January 2013 to January 2016 were retrospectively analyzed. According to the chemotherapy regimen, the patients were divided into VCD group (41 cases) and VD group (32 cases). The efficacy and adverse reactions of the two groups were evaluated. Results: The overall response rate of VCD group and VD group was 80.5% (33/41) and 78.1% (25/32) respectively, and the difference was not statistically significant (χ ²= 0.061, P= 0.804); and complete remission (CR) rate was 36.6% (15/41) and 15.6% (5/32) respectively, and the difference was statistically significant (χ ²= 3.970, P= 0.046); the median progression-free survival (PFS) was 27 months and 24 months respectively, and the median overall survival (OS) was 35 months and 33 months respectively, and the differences were not statistically significant (all P > 0.05). Most adverse reactions occurred in grade 1-2, in which peripheral polyneuropathy and thrombocytopenia were the most common. Peripheral neuritis was the most common finding among the adverse reactions of grade 3. The incidence of adverse reactions in both groups was not statistically significant (P > 0.05). Conclusions VCD and VD regimen could be recommended as a better induction therapy for NDMM patients. Compared with VD scheme, VCD scheme has a higher CR rate.

Objective To explore the effect of virtual laboratory (VL) + flipped classroom in teaching of virus infection diagnosis.Methods 40 students of Class One from clinical medical undergraduates of Grade 2014 were randomly taken as the experimental group,with 40 students of Class Two as the control group.The experiment group adopted flipped classroom teaching by virtual lab platform and classroom activities,while the control group adopted traditional classroom teaching such as watching video and lecturing.Finally post-test scores were compared by the independent samples t-test of SPSS 18.0 statistical software between the two groups.The teaching effects were evaluated through questionnaires survey in experimental group.Results The scores (82.73 ± 2.62) of comprehensive assessments were superior to the control scores (57.94 ± 4.65).Difference between the two groups was statistically significant (t=29.380,P=0.000).Students' satisfaction concerning the teaching methods and effects of the flipped classroom in experimental group was up to 85％.Conclusion Flipped classroom based on internet virtual lab platform in teaching of virus infection diagnosis can enhance the teaching quality and improve students' learning enthusiasm and thinking ability.

Background and purpose:Cyclooxygenase-2 (COX-2) participates in angiogenesis and lymph node metastasis of lung cancer. COX-2 inhibitors could inhibit invasion and metastasis of lung cancer. This study aimed to investigate the inhibition of invasion and metastasis by COX-2 inhibitor imrecoxib in xenograft tumor of lung adenocar-cinoma A549 cell in nude mice and to explore its possible mechanisms, in addition, to observe the efficacy of imrecoxib combined with lobaplatin.Methods:Thirty male BALB/c nude mice were injected subcutaneously with A549 cells into the right axillary region to establish xenograft models. Twenty-nine successfully modeled mice were randomly divided into four groups: control group (n=7), imrecoxib group (n=8), lobaplatin group (n=7), imrecoxib combined with lobaplatin group (n=7). The control group was treated with the same amount of sterile distilled water and injected with the same amount of 0.9% sodium chloride solution via caudal vein. The treatment group was treated with imrecoxib tablets 40 mg/kg per day through gavage and injected with lobaplatin 7.5 mg/kg per week via caudal vein respectively. The diet, physical activity and other normal conditions of nude mice were observed everyday. After 6 weeks, 29 mice were sacrificed and transplanted tumor tissues were cut off. The expression of PTEN, cortactin protein and mRNA were detected by immunohistochemistry and real-time PCR. The data were analyzed with one-way anova and non-parametric test.Results:In the last week, the diet and physical activity of all nude mice were less than before, and they became thinner, which were more obvious among the mice in lobaplatin group and imrecoxib combined with lobaplatin group. Compared with the control group, the expression of PTEN protein and mRNA were significantly increased in imrecoxib group and imrecoxib combined with lobaplatin group (P<0.001, respectively). Compared with the control group, the expression of cortactin protein and mRNA were significantly decreased in imrecoxib group and imrecoxib combined with lobaplatin group (P<0.001, respectively). PTEN and cortactin protein, PTEN and cortactin mRNA had significantly negative correlation (r=-0.660, -0.983,P<0.001, respectively). Conclusion:Imrecoxib can inhibit non-small cell lung cancer invasion and metastasis which may be involved in upregu-lating PTEN protein and reducing cortactin protein. Imrecoxib could enhance the effect of lobaplatin chemotherapy.