Objective To investigate the efficacy and the course of desensitization treatment in bronchial asthma with positive specific IgE to dust mite in children. Methods A total of 105 children with bronchial asthma with positive specific IgE to dermatophagoides farinae allergens were randomized into the observation group and the control group. Children in the control group were treated to continue anti-asthma according to the routine of prevention and treatment children with asthma. Chinldren in the observation group were treated by dermatophagoides farinae drops in addition to the treatment of children in the control group. The recurrence of asthma was compared between two groups at 25 weeks post-treatment. At 25 weeks post-treatment , children in the observation group was randomly divided into the observation groupⅠand group Ⅱ. Children in the observation groupⅠreceived continuous treatment except for desensitization treatment. Children in the observation group II received the sublingual immunotherapy with dermatophagoides farinae drops (No.4) for 1 year in addition to the treatment in the observation groupⅠ. The recurrence of asthma was also compared between the two sub-groups. Results The rate and times of recurrence of asthma were lower in the observation group than those in the control group(P < 0.05), with no significant differences between the observation groupⅠand groupⅡ (P > 0.05). Conclusion The recurrent rate and frequency of asthma could be reduced by the sublingual immunotherapy with dermatophagoides farinae drops in children with asthma of positive specific IgE to dust mite. The course of treatment may be half year long.

Background The pollution of agricultural products and the health risks caused by metals have become a hot spot of social concern. As China's main economic agricultural products, peppers are essential for health risk assessment. Objective By exploring the enrichment of common metals in different varieties of peppers in major growing areas of China, a bioavailability-based approach is used to assess dietary health risks of common metals in groups with different characteristics. Methods Through random sampling method, dried pepper samples from major pepper growing areas of China were purchased from the market, and were divided into Hippophae, Capsicum annuum, Magnoliopsida, Capsicum frutescens var, and Capsicum by morphological taxonomy, and a total of 667 batches of peppers were collected. Six common metals arsenic (As), cadmium (Cd), lead (Pb), nickel (Ni), copper (Cu), and zinc (Zn) were evaluated; physiologically based extraction test was designed to estimate the bioavailability of the metals in peppers and their associated dietary health risks were assessed. Results The concentrations of metals Cd and Ni in pepper exceeded the limits of China, and the disqualification rates were 6.1% and 22.7% respectively. The other metals were within the safe range; there were differences in the concentrations of As, Cd, Pb, Cu, and Zn among different pepper varieties (P<0.05). The order of bioavailability of the six metals in pepper from high to low was As (57.9%)>Cd (43.07%)>Zn (42.74%)>Pb (38.04%)>Ni (31.97%)>Cu (31.4%). Based on bioavailability, when the metal concentration in pepper was at the median level, the order of hazard quotient of metals in pepper was Cu>Cd>As>Ni>Zn>Pb, and at the 90th quantile level, the order was Cd>As>Cu>Ni>Zn>Pb; the hazard quotient of single metal element and the total target hazard quotient of combined metal elements were both less than 1, and these indicators of adults were higher than those of children. Conclusion In the collected pepper samples, the non-carcinogenic health risks of single metal elements and multiple metal elements are in the safe range. Based on gastrointestinal bioavailability, the dietary health risk of pepper is further reduced.

Talents constitute core resource in the development of healthcare sector. Based on the situation of the talent team in the Affiliated Hospital of Qingdao University, the authors systematically constructed the hierarchical and classified system for talent cultivation, centering on three key areas of talent cultivation, evaluation and assessment. The authors analyzed the achievements since the implementation in 2016, namely the innovation of talent evaluation, the construction of discipline echelon, and the communication and inter-departmental cooperation. At the same time, the authors further put forward targeted suggestions to promote the development of talent teams in terms of transforming the human resource management model, increasing policy support and funding, implementing refined management, and improving talent evaluation indicators by the levels and types.

BACKGROUNDBone metastasis is very common in lung cancer patients. Metastasis to spine can lead to paralysis and fracture, deteriorate the quality of patient's life. The objective of this study is to investigate the diagnostic values of bone scanning (NBS), MRI, CT and X-ray examination to discover bone meastasis of lung cancer, and the therapy of bone metastasis and the prognostic factors.

METHODSAbout 561 consecutive NSCLC cases were analyzed with NBS and compared with other radiological examinations (MRI, CT and X-ray).

RESULTSOut of the 455 positive patients by NBS, 300 cases were confirmed to be with bone metastases by dynamic follow-up, MRI, CT and X-ray, and 5 cases were false negative.The sensitivity and specificity of NBS was 98.36% and 39.45% respectively. The accuracy of NBS was 71.48%. Among the 305 patients with bone metastases, 23 patients had no records, 138 patients had bone pain, the incidence of asymptomatic bone metastasis was 47.21%. Multivariables analysis showed that asymptomatic bone metastasis, flat bone metastases, therapy with disodium pamidronate were significantly good prognostic factors, respectively (P < 0.05).

CONCLUSIONSA whole body NBS examination is preferred for the staging of NSCLC. NBS is necessary for patients with NSCLC. In order to exclude the possible false positive or false negative diagnosis by NBS, CT or MRI could be selected according to the sites of lesions.

Objective To investigate the distribution of divalent metal transporter 1 (DMT1) in the cerebellum of APP/PS1 transgenic mouse. Methods Immunohistochemistry, immunofluorescence, and confocal laser scanning microscopy were used to analyze the relationship between DMTl and amyloid beta (Aβ) and their distribution in senile plaques. Western blotting was used to analyze DMT1 protein level in the APP/PS1 transgenic mouse cerebellum. Results DMTl and Aβ were mainly located in the amyloid plaques, which were predominately located in the molecular layer of the cerebellar cortex of the transgenic mouse. Only a few plaques could be seen in the Purkinje cell layer and granular layer. Confocal laser microscopy revealed the DMTl and Aβ were co-localized in senile plaques. Conclusion The abundant expression of DMTl protein suggests that DMTl and the divalent metal ions that it transports might be involved in the formation of Aβ senile plaques and other pathological processes in the cerebellum in Alzheimer' s disease.

Objective: To study the microstructure development of mandibular bone in rats on timing sequence and under different occlusal force. Methods: 63 male SD rats aged 23 days were randomly divided into three groups (n = 7): Baseline group, soft-diet (SD) group and hard-diet (HD) group. 7 rats were killed at week 0, 2, 4, 6 and 8 respectively after feeding the food with different hardness.Micro-CT was used to reconstruct and analysis microstructure of the region of interest in mandible of the rats. Results: Compared with HD group, bone volume/total volume (BV/TV) and trabecular thickness (Tb. Th) decreased significantly after 4 th week (P ＜ 0. 05), the bone surface/bone volume (BS/BV) and trabecular separation (Tb. Sp) increased significantly during the 4 th to the 6 th week (P ＜0. 05) . Conclusion: In the process of mandibular development in rats, reduction of occlusal force may lead to reduction of bone mass, and the changes of microstructure are closely related to the time of intervention.

Objective To compare the differences in the long-term survival rate and the tumor shrinkage rate of inoperable hepatocellular carcinoma (HCC) between transcatheter arterial chemoembolization (TACE) combined with percutaneous ablation therapy and simple TACE therapy in order to provide the basis for the clinical treatment of HCC.Methods Randomized controlled trials (RCT) for comparing the difference in survival rates between TACE plus PA and simple TACE for inoperable HCC were searched from medical literature database,from which the relevant data were extracted.According to Cochrane manual standard,the quality of inclusion literature was evaluated.Results A total of 15 RCT papers were included in this study,including 859 HCC patients.The results of meta-analysis showed that all the 1-year,2-year and 3-year survival rates in TACE plus PA group were better than those in simple TACE group (RR=1.454,95％CI=1.333and 1.586,Z=8.56,P＜0.001;RR=1.781,95％CI=1.511 and 2.099,Z=6.88,P＜0.001;RR=2.351,95％CI=1.808 and 3.059,Z=6.37,P＜0.001,respectively).The tumor shrinkage rate in TACE plus PA group was also better than that in simple TACE group (RR=1.314,95％CI=1.190 and 1.452,Z=5.38,P＜0.001).The sensitivity analysis indicated that the results of the differences in survival rate and tumor shrinkage rate between the two groups were reliable.Conclusion The 1-year,2-year and 3-year survival rates as well as the tumor shrinkage rate of TACE plus PA group are higher than those of simple TACE group.

Artificial Intelligence (AI) is an interdisciplinary subject developed on the basis of computer technology, cybernetics, mathematics, philosophy and brain science. The purpose of AI is to study new ways to extend the intelligence of human brain in various fields. In recent years, the rapid development of AI technology has brought innovation to medical science and health care. During the pandemic of coronavirus disease 2019 (COVID-19) AI has been widely used in epidemiological investigation and outbreak prediction, clinical diagnosis and treatment, hospital management, research and development of new drugs and vaccines. The application of AI has reduced the clinical workload and the consumption of medical resources, greatly assisted the battle against COVID-19.This article introduces the progresses on the applications of AI technology to provide information for its further application in the fighting against COVID-19.

Objective The aim of this study is to explore the changes of expression of integrin αvβ3 in bovine u-terine epithelial cells in vitro induced by estrogen or/and progesterone alone or in combination,and to provide a new refer-ence marker for determining bovine uterine receptivity state. Methods RT-PCR was used to analyze the transcriptional changes of αvβ3 expression in bovine endometrium treated by different concentrations of estrogen,progesterone alone or in combination. Results The expression of integrin αvβ3 reached the highest level when the culture medium was added with progesterone at the concentration of 10 -7mg/mL,and the expression of αv and β3 in the 10 -7mg/mL concentration group was significantly higher than that of the control one(P<0.05). Moreover,the expression of αv was highest in the 10 -10 mg/mL E2group,but the expression of β3 was the lowest in that one. In addition,adding with both estrogen and progester-one,the transcriptional level of integrin αvβ3 was significantly higher than that in the control one. The transcriptional level of αv in the treatment group was significantly higher than that in the control group(P<0.05),but the transcriptional level of β3 in this group was not(P>0.05). Conclusions It can be concluded that integrin αvβ3 can be used as a new poten-tial reference marker gene for detecting the bovine uterine receptive status.

Objective Aimed to develop the evaluation system and weight of hospital orientation training.Methods Literature review,Delphi,questionnaire,AHP to develop the evaluation system and determined the weight with Satty's method.Results The evaluation system includes 3 division's 13 items.Conclusions Course content,teaching method,course difficultness and occupational plan ning play the most important role,and should be paid more attention.