OBJECTIVE:To compare the clinical effects between alprostadil and the traditional therapy in treating sudden deafness.METHODS:A total of120patients were randomly ascribed to receive alprostadil(treatment group)or traditional drugs(e.g.low molecule dextran,dexameth,danshen root injection,control group),the two groups were assisted with hyper-baric oxygen treatment,the total effective rates of the two groups were compared.RESULTS:The total effective rates of the treatment group and the control group were75%and56.7%,respectively,and there was significant difference between the two groups(P

Objectives To identify the related knowledge,attitude and behavior of drug of Xi'an adolescents and provide the evidence for establishment of intervention measures. Methods A conve-nience sampling method was used to select 1224 adolescents from grade one of junior middle school to grade three of senior middle school in 4 middle schools in Xi'an. A set of questionnaires were used to col-lect the data on knowledge, attitude and behavior of drug. All data were analyzed by SPSS 11.5. Results Mean score of drug knowledge was (22.45±9.77) and mean score of attitude to drug was (58.82±6.85). A-mong the investigation objects, 16 people (1.4%) admitted having used drug. Conclusions The adoles-cents don't have sufficient knowledge for the relation between infectious disease and drug abuse, and the difficulty of detoxification. The adolescents had a positive attitude towards drug. The adolescents' behavior of using drug should be attached importance to by school and parents.

Objective To investigate the mechanism of Guiqiyiyuan Ointment (GO) for preventing and treating 12C6+ beam radiation induced lung and kidney bystander effect to provide a new strategy for prevention and treatment of clinical radiation injury. Methods Sixty healthy male Wistar rats were randomly and equally divided into 3 groups: NC group, SR group (simple radiation 2ml/kg), GO group(GO 2ml/kg intragastric administration for 7 days). The right side of the lung was modeled by 12C6+beam radiation. After modeling, the rats were killed at 48h. The left lung, left and right kidney tissues were taken from the rats. The DNA methylation rate was detected by ELISA assay, pathological changes were observed by HE staining, and the expressions of Dnmt1, Dnmt3a and Dnmt3b were detected by immunohistochemistry. Results Compared with the NC group, the level of DNA methylation was decreased significantly (P<0.01), the left lung showed inflammation, no abnormal finding was seen in the left and right kidneys, and the expressions of Dnmt1, Dnmt3a and Dnmt3b were significantly increased in the SR group (P<0.01). Compared with the SR group, the level of DNA methylation was increased significantly (P<0.01), the left lung inflammation became better, and the expressions of Dnmt1, Dnmt3a and Dnmt3b were significantly decreased in the GO group (P<0.01). Dnmt1, Dnmt3a and Dnmt3b proteins were expressed in the cytoplasms of bronchial and renal tubular epithelial cells in all the groups. The NC group presented as light brown-brown staining, showing a weak positive expression, the SR group as brown-brown staining, showing astrong positive expression, and the GO group as light brown-brown staining, showing a moderate positive expression. Conclusion The GO can reduce the bystander effect caused by 12C6+ beam radiation, and its mechanism is related to improving the level of DNA methylation.

Objective: To investigate the origin of infection and risk factors of a case with SARS-CoV-2 infection associated with overseas countries in the Ningbo-Zhoushan Port, Zhejiang Province, so as to provide the evidence for improving the COVID-19 control measures at ports. Methods: Ningbo Center for Disease Control and Prevention ( CDC ) and Beilun CDC conducted case finding and epidemiological surveys immediately after being informed. The general information, history of vaccination and the travel during the latest 14 days were collected from the positive case, and all close contacts were tracked. Saliva samples were collected for SARS-CoV-2 nucleic acid testing and whole-genome sequencing, and the sequencing results were aligned with the GISAID's EpiCoV database. The origin of infection and transmission route of the positive case was investigated. Results: A case was identified positive for SARS-CoV-2 nucleic acid during company M's routine screening in the Ningbo-Zhoushan Port on August 10, 2021, and was confirmed positive for SARS-CoV-2 nucleic acid by Beilun CDC and Ningbo CDC on August 11. Whole-genome sequencing showed SARS-CoV-2 B.1.617.2 ( Delta ) variant, which shared the highest homology with the virus sequence uploaded by Russia on June, 2021 ( Russia/MOW-RII-MH27356S/2021 ). The case was a bundling worker for overseas container ships, and reported communicated with foreign boatmen and contacted materials without protected interventions on the SINOKOR AKITA Container Ship between August 4 and 5, 2021. This ship anchored at Vladivostok, Russia from July 27 to 29, anchored at Ningbo Harbor on August 4, and departed on August 5. Then, 11 boatmen from this ship were tested positive for SARS-CoV-2 nucleic acid on August 8. One asymptomatic case was reported in this epidemic; 254 close contacts and 617 secondary close contacts were identified, and all were tested negative for SARS-CoV-2 nucleic acid. No new cases with SARS-CoV-2 infections were detected until August 25, 2021, and the emergency response was therefore terminated. Conclusions The infection was a sporadic COVID-19 epidemic associated with overseas countries, which was caused by Delta variant infection through contacts with foreign boatmen or materials by a bundling worker in Ningbo-Zhoushan Port; fortunately, no epidemic spread occurred. Intensified closed-loop management and increased frequency of SARS-CoV-2 nucleic acid test among high-risk populations, and improving the precision and rapid emergency treatment of COVID-19 epidemics are required for the containment of COVID-19 at ports.

Objective To investigate the role of BMP-2/Smad signaling pathway in the osteogenic differentiation of human aortic smooth muscle cells (HASMCs) caused by hyperphosphatemia -induced calcium phosphate (CaP) crystals.Methods High-phosphate medium was incubated at 37℃ for 3 days.CaP crystals and supernatant were isolated by ultracentrifugation.Scanning electron microscope and energy dispersive X-ray spectroscopy were performed for analysis of physicochemical characteristics of CaP crystals.HASMCs were cultured in vitro,and divided into high-phosphate,control,crystals and supernatant groups.Calcification was visualized by Alizarin red staining.Calcium loads in cells were quantified by o-cresolphthalein complexone method.Protein expression of bone morphogenetic protein-2 (BMP-2),Runt-related transcription factor 2 (RUNX2),osteopontin (OPN),phospho-Smad1/5/9 (p-Smad1/5/9) were quantified by Western blotting.After knockdowns of BMP-2 and Smad1 with small hairpin RNA (shRNA) interfering respectively in HASMCs,protein expressions were measured by Western blotting.Results High-phosphate medium induced the formation of CaP crystals.Compared with the cells in control group,CaP crystals significantly induced HASMCs calcification,increased calcium loads and up-regulated the levels of BMP-2,RUNX2 and OPN proteins (all P ＜ 0.05).After the addition of CaP crystals into HASMCs,the level of p-Smad 1/5/9 protein peaked at 30 min (P ＜ 0.05).After BMP-2 was knocked down in HASMCs,the expression of p-Smad1 caused by CaP crystals was blocked completely,and the expressions of RUNX2 and OPN caused by CaP crystals were reduced significantly (all P ＜ 0.05).After Smad1 was knocked down in HASMCs,the expressions of RUNX2 and OPN caused by CaP crystals were decreased significantly (all P ＜ 0.05).Conclusions Hyperphosphatemia-induced CaP crystals promoted osteogenic differentiation of HASMCs through the BMP-2/Smad signaling pathway.

ObjectiveTo explore the intervention mechanism of Xiangsha Liujunzi Tang in rats with functional dyspepsia （FD） based on the Ras homolog gene family member A （RhoA）/Rho-associated coiled-coil containing protein kinase 2 （ROCK2）/Myosin phosphatase target Subunit 1 （MYPT1） pathway. MethodSixty male SD suckling rats in SPF grades were randomly divided into blank group （n=10） and model group （n=50）. The comprehensive modeling method （gavage administration of iodoacetamide+exhaustion of swimming+disturbance of hunger and satiety） was used to replicate the rat model of FD. After successful replication of the model， the rats in the model group were randomly divided into model group， mosapride group， and high， middle， and low-dose Xiangsha Liujunzi Tang groups， with 10 rats in each group. Rats in the blank group and model group were given 10 mL kg^-1·d^-1 normal saline， those in the mosapride group were given 1.35 mg·kg^-1·d^-1 mosapride， and those in the high， middle， and low-dose Xiangsha Liujunzi Tang groups were given 12， 6， and 3 g·kg^-1·d^-1 Xiangsha Liujunzi Tang， respectively. The intervention lasted 14 days. The general living conditions of rats were observed before and after modeling and administration， and the 3-hour food intake and body mass of rats were measured. After intervention， the intestinal propulsion rate of rats was measured， and the pathological changes in the gastric tissue were observed by hematoxylin-eosin （HE） staining. The content of choline acetyl transferase （ChAT） and vasoactive intestinal peptide （VIP） in the medulla oblongata and gastric tissue homogenate was determined by enzyme-linked immunosorbent assay （ELISA）， the distribution of adenosine triphosphate （ATP） enzyme in gastric antrum smooth muscle was observed by frozen section staining， and the protein expression levels of RhoA， ROCK2， and phosphorylated-myosin phosphatase target subunit 1 （p-MYPT1） in the gastric tissue were detected by Western blot. ResultCompared with the blank group， the model group had withered hair， lazy movement， slow action， poor general living condition， lower 3-hour food intake， body mass， and lower intestinal propulsion rate （P<0.05）， whereas no obvious abnormality in gastric histopathology. In the model group， the content of ChAT in the medulla oblongata and gastric tissue decreased， the content of VIP in gastric tissue increased， the distribution of ATP enzyme in gastric antrum smooth muscle decreased significantly， and the protein expression levels of RhoA， ROCK2， and p-MYPT1 in the gastric tissue decreased significantly （P<0.05）. As compared with the model group， the general living condition of rats in each intervention group was significantly improved， and the 3-hour food intake， body mass， and intestinal propulsion rate were significantly increased （P<0.05）. There was no significant difference in gastric pathology in the intervention groups. The content of ChAT in the medulla oblongata and gastric tissue increased significantly， the content of VIP in the gastric tissue decreased， the distribution of ATP enzyme in gastric antrum smooth muscle increased significantly， and the protein expression levels of RhoA， ROCK2， and p-MYPT1 in the gastric tissue increased significantly （P<0.05）. The intervention effect of Xiangsha Liujunzi Tang group on the above indexes was dose-dependent. ConclusionXiangsha Liujunzi Tang can effectively improve the general living condition and gastric motility of rats with FD， and its specific mechanism may be related to the activation of the RhoA/ROCK2/MYPT1 pathway in the gastric tissue to regulate smooth muscle relaxation and contraction and promote gastric motility.