Objective To prevent the medical personnel from infection during aeromedical evacuation of fulminating respiratory infectious disease patients by exploring the changes of differential pressure between those in and out of the negative-pressure isolation capsule and analyzing the stability of the capsule during aeromedical evacuation.Methods A differential pressure monitor developed by Institute of Medical Equipment was used for real-time recording of the changes the differential pressure in and out of the capsule during five flight phases of the aircraft,and the safety of the capsule during aeromedical evacuation and corresponding considerations were investigated.Results The maximum and minimum values of the negative pressure in the capsule were-60 Pa and-120 Pa respectively during aeromedical evacuation,which were all less than the safety threshold-15 Pa.The negative pressure was is directly proportional to the flying altitude.Conclusion The capsule keeps negative pressure effectively during flight,and thus facilitates patient aeromedial evacuation greatly.

Abstract: Objective　To genotype and analyze whole genomic features of Coxsackievirus B3 (CVB3) isolated in Tianjin, to improve evolution information of CVB3 virus in Tianjin, and to provide basis for surveillance and early warning of related diseases. Methods　Viral RNA was extracted from five CVB3 strains isolated in Tianjin, whole genome sequence of the virus was amplified by RT-PCR and sequenced by next-generation sequencing method, and phylogenetic and recombinant analysis were carried out. Results　The open reading frame 1(ORF) of the five CVB3 strains contained 6 555 nucleotides and encoded 2 185 amino acids, and ORF2 was composed of sequences encoding 68 amino acids. The nucleotide sequence similarity ranged from 78.3%-100%, and the amino acid sequence similarity ranged from 95.7%-100%. Compared with the CVB3 prototype strain, the nucleotide sequence similarity of the five viruses was between 78.2%-79.1%, and the similarity of amino acid sequences was 94.9%-95.3%. All five viruses exhibited a T151A mutation on the VP2 protein. Additionally, the encephalitis isolate showed a K158E mutation on the VP2 protein, while one of the sewage isolates had a C234T mutation in 5' noncoding region. The five strains belonged to two different genotypes, among which the encephalitis isolate in 2016 belonged to the D genotype, while the sewage isolates in 2021 belonged to the E genotype. This is also the first report of E genotype CVB3 in northern China. The CVB3 strain may have recombinant events in non-structural protein regions, in which encephalitis isolate may recombine with a Coxsackievirus B5 (CVB5) strain, while sewage isolates may have recombinant events with a strain of ECHO virus 18 (E18). Conclusions　The CVB3 isolates in Tianjin belong to D and E genotypes, and recombination events may exist in non-structural protein region of the viral genome. The results of CVB3 virus genome analysis in sewage suggests presence of CVB3 infection in the population of Tianjin, and its epidemic dominant genotype may have changed.

Since the attenuated live vaccine against measles was developed,the epidemic of measles has been controlled effectively,however,there is a trend of gradual increase of measles cases in recent years.The epidemiological and clinical features of 4430 measles patients in Shenzhen Municipality in last 10 years were reviewed.The data showed that the epidemic season was postponed with the peak of June to September;the prevalent age groups were infants and adults,the number of severe cases increased;and the positive rate of serological antibody in infants with measles was the lowest.

Objective To investigate the changes of serum copper in mice after whole-body irradiation and analyze the feasibility of these changes as a biological dosimeter.Methods Serum copper in mice exposed to 60 Co γ-rays(0,1,2,3,5 Gy) was collected from the orbital of mice and detected with 5-Br-PADAP colorimetric method at 30 min and 7 d after radiation.One-way analysis of variance was used to analyze the difference of serum copper in each group and Dunnett-t test was used to compare the difference between control group and irradiated groups.Linear and quadratic linear fitting function was used to analyze the relationship between serum copper and radiation dose.The change of serum copper was detected at 30 min,1,3,5,7,10,13 and 16 d after radiation to observe the persistence of serum copper.The established relationships were used to estimate the dose in 8 mice irradiated by a blind dose.Results The amount of serum copper in irradiated mice were significantly (F =208.20,145.98,P ＜ 0.05)dependent on the radiation doses with dose responses of y =-0.091x + 0.936 and y =-0.011x2-0.032x + 0.962 (r =0.989,0.995) at 30 min and 7 d post-irradiation,respectively.The concentration of serum copper at 2.0 Gy decreased at 30 min post-irradiation,increased at 1-7 d,then kept at a stable level at 7-14 d even increased slightly after 14 d.With these dose response curves,after radiation with a blind dose of 2 Gy,the absorb doses of mice were assessed to be (1.83-2.25) Gy and (1.82-2.11) Gy at 30 min and 7 d in 95％ confidence interval,respectively.Conclusions The serum copper is a quick,simple,and sensitive biomarker for the early assessment of absorb dose of irradiated mice.

Transcription factor is one of the key factors in the regulation of gene expression at the transcriptional level. It plays an important role in plant growth, active components biosynthesis and response to environmental change. This paper summarized the structure and classification of bHLH transcription factors and elaborated the research progress of bHLH transcription factors which regulate the active components in plants, such as flavonoids, alkaloids, and terpenoids. In addition, the possibility of increasing the concentration of active substances by bHLH in medicinal plants was assessed. The paper emphasized great significance of model plants and multidisciplinary research fields including modern genomics, transcriptomics, metabolomics and bioinformatics, providing the contribution to improve the discovery and function characterization of bHLH transcription factors. Accelerating the research in the mechanism of bHLH transcription factors on the regulation of active components biosynthesis will promote the development of breeding and variety improvement of Chinese medicinal materials, also ease the pressure of resources exhaustion of traditional Chinese medicine home and abroad.

Objective To investigate the prognostic value of preoperative neutrophil lymphocyte ratio (NLR) in patients with gastrointestinal stromal tumors (GIST).Methods The clinical-pathological data from 85 GIST cases were collected from the Second Affiliated Hospital of Wenzhou Medical University and retrospectively analyzed from June 2009 to December 2013.According to the exclusion criteria,79 cases were enrolled.Preoperative neutrophil and lymphocyte count was collected and NLR was calculated.According to the receiver operating characteristic (ROC) curve of NLR,GIST patients were divided into low NLR group (NLR ＜ 2.30) and high NLR group (NLR ≥ 2.30).Clinic-pathological features and five year disease free survival (DFS) were compared between the two groups.Results There was a statistical significant difference in tumor size and tumor risk between high NLR group and low NLR group (respectively,x2 =9.517,12.411,all P ＜ 0.05).Univariate analysis showed that the five year disease free survival rate of low NLR and high NLR group were 78％ and 32％ (x2 =18.749,P =0.000).By multivariate analysis a high NLR was identified as an independent risk factor of poorer prognosis for patients with GISTs (RR:3.516,95％CI:1.453-8.506,P=0.005).Conclusion A high preoperative NLR is an independent risk factor for the prognosis of GISTs.

Objective To observe the changes of Th1 / Th2 inflammatory factors in the aqueous humor of tree shrews with fusarium solani keratitis,as well as to explore the relationship between Thl / Th2 inflammatory factors and inflammatory response in fusarium solani keratitis.Methods Forty healthy tree shrews were randomly divided into experimental group(n =30) and control group (n =10).Fusarium solani was inoculated into sabina culture medium and cultured at 26 ℃ for 7 days,and then the fungal suspension was collected and the density of spores was adjusted to 10 × 109 CFU · mL-1.In the experimental group,50 μL fungal spore suspension was injected into the center of the cornea stroma,while the control group received the same amount of saline.Next the levels of cytokines including interleukin (IL)-1 β,IL-6,IL-4 and IL-10 were analyzed by flow cytometry on day 3,day 7,day 14 after successful modeling,and the changes in types of infiltrating cells were observed by histopathological examination.Results The expression level of IL-1 β and IL-6 (Th1 type cytokines) was the highest on day 7,and the difference was statistically significant at each time point when compared with the control group (all P ＜ 0.05).The expression level of IL-10 (Th2 type cytokines) was the highest on day 14,and the difference was statistically significant at each time point when compared with the control group (all P ＜ 0.05).The difference in IL-4 expression was statistically significant on day 7 (P ＜ 0.05).In addition,histopathological examination showed that the number of infiltration cell reached its peak on day 7,mainly neutrophils,and fungal hyphae were observed to be parallel to the matrix fibers at each time point.Conclusion The proinflammatory cytokines IL-1β and IL-6 and the anti-inflammatory cytokines IL-10 may play an important role in the molecular mechanism of inflammatory response of fusarium solani keratitis in tree shrews.

The medicinal fungi, which are of great importance in traditional medicine, are facing the problems of wild resources scarcity and low concentration of bioactive compounds. Velvet family and LaeA global regulator play a vital role in secondary metabolism and developmental programs, which are found in a wide variety of fungi ranging from Chytridiomycota to Basidiomycota. This review elaborates the structures and functions between Velvet family and LaeA protein. The Velvet family which shares the Velvet protein domain, including VeA (Velvet), VelB (Velvet like B), VosA (viability of spores A) and VelC (Velvet like C), acts on the regulation function is secondary metabolism and developmental programs such as asexual and sexual development. Furthermore, the function is affected by environmental factors such as light and temperature. LaeA protein which owns S-adenosylmethionine-dependent methyltransferase domain, coordinately regulates development and secondary metabolism by regulating and modifying the Velvet proteins. The regulation of LaeA is mediated by light receptor proteins. Therefore, clarifying the mechanism of Velvet and LaeA proteins in medicinal fungi will pave the way for nurturing medicinal fungi and improving production of bioactive compounds.

Objective To analyze the electroencephalograph (EEG) features of 43 patients with clinically possible or probable Creutzfeldt-Jakob disease (CJD) and its correlation with megnetic resonance imaging (MRI) imaging and clinical manifestations.Methods All patients diagnosed with suspected CJD who were hospitalized in Xuanwu Hospital from January 2013 to December 2015 were collected.The clinical data, EEG and MRI imaging features were analyzed retrospectively.Based on the periodic sharp wave complexes (PSWC) appearance in EEG results, the patients were divided into typically changed group (TCG), atypically changed group (ACG) and unchanged group (UCG).Age, disease duration, clinical manifestations and MRI features among three groups were analyzed and the correlations between patient′s EEG features and age, disease duration, clinical manifestations or MRI features were explored using spearman method.Results Among the 43 patients with possible or probable CJD disease, 26 were male and 17 were female with an average disease duration of 4 months.The age of onset ranged from 31 to 80 with an average of (58.0±9.8) years old, and 86.0% of patients were 51 years old or above.Clinical characteristics of CJD patients according to occurrence rate were as follows: 35 cases (81.4%) with cognitive impairment, 29 cases (67.4%) with mental and behavior disorder, 28 cases (65.1%) with pyramidal tract damage, 24 cases (55.8%) with cerebellar symptoms, 23 cases (53.5%) with extrapyramidal symptoms,17 cases (39.5%) with myoclonic, 13 cases (30.2%) with dyssomnia, 13 cases (30.2%) with visual disorder and 2 cases (4.7%) with akinetic mutism.Regarding EEG features, 39.53% (17/43) of patients showed typical periodic sharp wave complexes (PSWC) (TCG group), 51.2% (22/43) had irregular rhythm and different forms of slow wave (ACG group) and only 9.3% (4/43) had no EEG change (UCG group).The occurrence rate of ribbon sign in MRI was 82.4% (14/17) in TCG group, 77.3% (17/22) in ACG group and none in UCG group.The rates were significantly higher in TCG and ACG group than that in UCG group (both P<0.05).Spearman correlation analysis revealed that EEG features was correlated with disease duration (r=0.351, P=0.021) and visual impairment (r=-0.377, P=0.013) for all CJD patients.There was no correlation between EEG and MRI or other clinical manifestations such as myoclonic, age and so on (all P>0.05).Conclusions EEG showed typical changes associated with disease duration in different stages of disease.EEG and MRI are two different means to evaluate different aspects of patients with CJD disease, and combination of two means could achieve better evaluation results.

Objective:To evaluate the feasibility and therapeutic efficacy of transhepatic arterial embolization with superparamagnetic iron oxide (SPIO) and lipiodol (LIP) for the treatment of VX2 tumor in rabbits.Methods:Twenty-four rabbits with hepatic VX2 tumors by surgical implantation were randomly divided into 4 groups and treated with transhepatic arterial embolization of 4 different agents as follows (n=6 each):doxorubicin (DOX) group,DOX-LIP group,SPIO-DOX group,and SPIO-DOX-LIP group.Liver function (AST and ALT) was measured at 0,1,3,5 and 7 d after transhepatic arterial embolization.The serum DOX level was measured at 0,5,15,30,60,and 120 minutes after transhepatic arterial embolization.MRI was performed at 7 d after the treatment to assess the distribution of SPIO in the SPIO-DOX group and SPIO-DOX-LIP group,while CT was performed to assess the distribution of LIP in the DOX-LIP group and SPIO-DOX-LIP group.All the rabbits were sacrificed and their livers were removed at 7 d after treatment for the detection of tissue DOX level.The histopathologic examinations were performed including HE staining,Prussian blue staining and TUNEL assay,and then the tumor necrosis percentage and apoptosis index were calculated.Results:Compared to the DOX group,the levels of AST and ALT in other 3 groups were significantly elevated at 1 and 3 d after embolization (P＜0.05).The levels of ALT and AST in the DOX group,DOX-LIP group or SPIO-DOX-LIP group returned to the baseline at day 7,there were no significant differences (P＞0.05).The SPIO-DOX-LIP group exhibited the lowest serum DOX level at all time points up to 120 minutes after embolization (P＜0.05).However,the tissue DOX level in the SPIO-DOX-LIP group was the highest among all groups at day 7 (P＜0.05).The SPIO-DOX group and SPIO-DOX-LIP group showed significantly lower MRI signal intensity of tumors in T2 weighted imaging (T2WI) at day 7.Meanwhile DOX-LIP group and SPIO-DOX-LIP group showed that high-density lipiodol was deposited in the tumors in CT images.Histopathologic findings showed an almost complete central necrosis coagulation of tumors in the SPIO-DOX-LIP group,and the tumor necrosis percentage and tumor apoptosis index were significantly increased in the SPIO-DOX-LIP group compared to those in other 3 groups (P＜0.05).Conclusion:This novel drug-delivery system of SPIO nano-drug carrier together with LIP is safe and feasible when it is used for transhepatic arterial embolization for liver tumor.It provides an excellent MR and CT visualization and improves the therapeutic efficacy for the treatment of rabbit VX2 liver tumor.