Oxidative Damage to BV2 Cells by Trichloroacetic Acid: Protective Role of Boron via the p53 Pathway / 生物医学与环境科学（英文）

This study aimed to investigate the neurotoxicity induced by trichloroacetic acid (TCA) and the possible protective mechanisms of boron (B). Mouse BV2 cells were treated with TCA (0, 0.39, 0.78, 1.56, 3.12, 6.25, or 12.5 mmol/L) and B (0, 7.8, 15.6, 31.25, 62.5, 125, 500, or 1,000 mmol/L) for 3 h and 24 h, respectively. Then, reactive oxygen species, and supernatant proinflammatory cytokine and protein levels were analyzed after 24 h of combined exposure. Beyond the dose-dependent decrease in the cellular viability, it clearly increased after B supplementation ( P < 0.05). Moreover, B decreased oxidative damage, and significantly down-regulated IL-6 levels and up-regulated TNF-β production ( P < 0.05). B also decreased apoptosis via the p53 pathway. The present findings indicated that TCA may induce oxidative damage, whereas B mitigates these adverse effects by decreasing cell apoptosis.

Identification of medicinal plants within the Apocynaceae family using ITS2 and psbA-trnH barcodes / 中国天然药物

To ensure the safety of medications, it is vital to accurately authenticate species of the Apocynaceae family, which is rich in poisonous medicinal plants. We identified Apocynaceae species by using nuclear internal transcribed spacer 2 (ITS2) and psbA-trnH based on experimental data. The identification ability of ITS2 and psbA-trnH was assessed using specific genetic divergence, BLAST1, and neighbor-joining trees. For DNA barcoding, ITS2 and psbA-trnH regions of 122 plant samples of 31 species from 19 genera in the Apocynaceae family were amplified. The PCR amplification for ITS2 and psbA-trnH sequences was 100%. The sequencing success rates for ITS2 and psbA-trnH sequences were 81% and 61%, respectively. Additional data involved 53 sequences of the ITS2 region and 38 sequences of the psbA-trnH region were downloaded from GenBank. Moreover, the analysis showed that the inter-specific divergence of Apocynaceae species was greater than its intra-specific variations. The results indicated that, using the BLAST1 method, ITS2 showed a high identification efficiency of 97% and 100% of the samples at the species and genus levels, respectively, via BLAST1, and psbA-trnH successfully identified 95% and 100% of the samples at the species and genus levels, respectively. The barcode combination of ITS2/psbA-trnH successfully identified 98% and 100% of samples at the species and genus levels, respectively. Subsequently, the neighbor joining tree method also showed that barcode ITS2 and psbA-trnH could distinguish among the species within the Apocynaceae family. ITS2 is a core barcode and psbA-trnH is a supplementary barcode for identifying species in the Apocynaceae family. These results will help to improve DNA barcoding reference databases for herbal drugs and other herbal raw materials.

Verification on the Developmental Toxicity of Short-term Exposure to Phenol in Rats / 生物医学与环境科学（英文）

Objective@#To verify the health advisory for short-term exposure to phenol.@*Methods@#The method of this validation experiment was the same as the US Environmental Protection Agency (EPA) methodology for toxicology experiments used to determine phenol drinking water equivalent level (DWEL). Pregnant female Sprague-Dawley rats were administered phenol in distilled water by gavage at daily doses of 15, 30, 60, 120, and 240 mg/kg body weight (b.w.) from implantation (the 6th day post-mating) to the day prior to the scheduled caesarean section (the 20th day of pregnancy). The following information was recorded: general behavior; body weight; number of corpus luteum, live birth, fetus, stillbirth, and implantation; fetal gender; body weight; body length; tail length; and abnormalities and pathomorphological changes in the dams.@*Results@#In the 60 mg/kg b.w. dose group, the mortality of pregnant rats increased with increasing doses, suggesting maternal toxicity. Fetal and placental weights decreased as phenol dose increased from 30 mg/kg b.w., and were significantly different compared those in the vehicle control group, which suggested developmental toxicity in the fetuses. However, the phenol-exposed groups showed no significant change in other parameters compared with the vehicle control group ( > 0.05).@*Conclusion@#Despite using the same method as the US EPA, a different NOEAL of 15 mg/(kg·d) was obtained in this study.

Study on Antioxidant Activity of Different Concentrations of Alcohol Extracts from Paeonia Rockii Pollen / 中国中医药信息杂志

Objective To evaluate the antioxidant activity of different concentrations of alcohol extracts from Paeonia Rockii pollen.Methods The antioxidant activity of different concentrations of alcohol extracts from Paeonia Rockii pollen was evaluated by cupric reducing power method, DPPH radical scavenging activity method and ABTS radical scavenging activity method.Results The amounts of antioxidant activity of gallic acid of anhydrous ethanol extract, 75％ alcohol extract, 50％ alcohol extract, 25％ alcohol extract, and water extract from Paeonia Rockii pollen were 26.00, 28.33, 28.90, 14.98, and 9.24 mg/g, respectively. The sequence of the ability of scavenging DPPH free radical and ABTS radical was Vc > 50％ alcohol extract > 75％ alcohol extract > anhydrous ethanol extract > 25％ alcohol extract > water extract.Conclusion The different concentrations of alcohol extracts from Paeonia Rockii pollen has relatively strong antioxidant activity, especially for 50％ alcohol extract and 75％ alcohol extract.

Influence of Danhong injection combined metoprolol tartrate on hemodynamics and ECG in CHD pa-tients with arrhythmias / 心血管康复医学杂志

Objective :To analyze influence of Danhong injection combined metoprolol tartrate on hemodynamics and ECG in patients with coronary heart disease (CHD) and arrhythmias .Methods :A total of 98 CHD patients with ar-rhythmias treated in our hospital from Feb 2013 to Sep 2016 were selected .The patients were randomly divided into routine treatment group and combined treatment group (received Danhong injection combined metoprolol tartrate based on routine treatment group ) ,both groups were treated for continuous four weeks .Blood pressure etc .indexes and therapeutic effect were observed and compared between two groups before and after treatment .Results : Com-pared with before treatment ,after four-week treatment ,there were significant reductions in systolic blood pressure (SBP) ,diastolic blood pressure (DBP) ,mean arterial pressure (MAP) ,times of non-sustained ventricular tachycar-dia (NSVT) and ventricular premature beat (VPB) ,erythrocyte sedimentation rate (ESR) ,fibrinogen (Fg) ,hem-atocrit (HCT) ,whole blood low shear viscosity (NBL) and whole blood high shear viscosity (NBH) ,and significant rise in PR interval in two groups ,and significant rise in QT interval in combined treatment group , P＜0. 05 or ＜0.01. Compared with routine treatment group after four-week treatment ,there were significant reductions in levels of SBP [ (120.11 ± 10.23) mmHg vs.(108.11 ± 7.83) mmHg] ,DBP [ (85.61 ± 5.61) mmHg vs.(70.12 ± 4.12) mmHg] ,MAP [ (100.11 ± 7.23) mmHg vs .(81.33 ± 5.16) mmHg] ,times of NSVT [ (4.51 ± 0.31) times/d vs. (2.11 ± 0.25) times/d] and VPB [ (3673.11 ± 86.34) times/d vs.(2711.34 ± 62.31) times/d] ,ESR [ (19.72 ± 2.73) mm/h vs.(12.44 ± 1.98) mm/h] ,Fg [ (300.11 ± 23.44) g/L vs.(223.43 ± 16.74) g/L] ,HCT [ (40.12 ± 3.57)% vs.(31.32 ± 2.14)% ] ,NBL [ (8.22 ± 1.11) mpa·s vs .(6.72 ± 0.84) mpa·s] and NBH [ (5.12 ± 0.73) mpa·s vs .(3.98 ± 0.56) mpa·s] ,and significant rise in QT interval [ (0.38 ± 0.17) s vs .(0.49 ± 0.19) s] ,PR interval [ (0.17 ± 0.02) s vs.(0.19 ± 0.03) s] and QRS interval [ (0.07 ± 0.02) s vs.(0.09 ± 0.03) s] in combined treatment group , P＜0. 01 all.Total effective rate of combined treatment group was significantly higher than that of routine treatment group (89.80% vs.73.47%) , P＝0.035 .Conclusion :Danhong injection combined metoprolol tartrate can significantly improve hemodynamic and ECG indexes in CHD patients with arrhythmias , which is worth extending .

Preliminary Study on the Gene Characteristics of Oidiomycetes Mutant Strains Like Bacterial Morphology / 现代检验医学杂志

Objective To further explore the genetic characteristics of oidiomycetes mutant strains like bacterial morphology on the basis of the study on morphology and structure of mutated candida.Methods The standard strains of candida albicans were induced by low temperature and under the condition of low temperature and nutrient deficiency.Variation of standard strains of Candida albicans were induced by clinical antifungal drugs such as fluconazole with different concentration gradient.Fungal gene template was prepared by boiling method,sequences of 16SRNA and 18SRNA were amplified using bacteria conservative gene sequence of 16SRNA and fungal conserved gene sequence of 18SRNA,and observed and recorded the results agarose gel electrophoresis.At the same time,the amplified fragment of bacterial conservative gene 16SRNA was sequenced,and the sequence was analyzed by BLAST comparison.Results the 16SRNA sequences of candida variant were amplified positive,while the standard strain of candida albicans did not show the corresponding amplification band.Except 2 strains which showed a faint band,the other variants of the 18SRNA sequences did not amplified the target band,while the standard strains of candida albicans showed a corresponding amplification bands.Suggested that proportion of 18SRNA sequences in the genome of oidiomycetes mutant strains like bacterial morphology was not much even lack.The 16SRNA fragments amplified of oidiomycetes mutant strains like bacterial morphology did determination of DNA sequence after purification.BLAST comparison analysis,it was found that sequence of oidiomycetes mutant strains like bacterial morphology had higher similarity with bacterial sequences in the database.Conclusion Oidiomycetes mutant strains like bacterial morphology contained bacterial and a small amount of fungus conservative gene.Oidiomycetes mutant strains like bacterial morphology with original nuclear biological character are ones from eukaryotes.This study is great significance in biological evolution,especially in the evolution of prokaryotic cells and eukaryotic cells.

Endemic plants for medicine use in China / 中国中药杂志

Based on plant species databases, species lists and literature records, general situation of the Chinese medicinal endemic plant (vascular plant) has been systematically summarized, and its quantity and distribution characteristics of Chinese medicinal endemic plants are presented in this paper. The results showed that 3 150 endemic species are Chinese medicinal plants belonging to 785 genera in 153 families, which includes 38 species of 22 genera in 12 families of pteridophyta, 42 species of 14 genera in7 families of gymnosperms, and 3 070 species of 749 genara in 134 families of angiosperms. The top four families involving medicinal endemic species are Asteraceae (218 species), Ranunculaceae (182 species), Labiatae (151 species), and Liliaceae (133 species). The top four provincial administration distributed medicinal endemic species are Sichuan (1 568 species), Yunnan (1 533 species), Guizhou (955 species) and Hubei (930 species).On the regional scale, the most abundant one is the southwest region (2 465 species), followed by the central region (1 226 species) and the northwest region (949 species). Localization characteristics for domestication and artificial cultivation of medicinal endemic species are more prominent due to their narrower and limited distribution areas, indicating it is possible for these species acting as local potential resource for reasonable economic development.

Exploring the clinical characters of Shugan Jieyu capsule through text mining / 中国中药杂志

In this paper,the potential climate factors affecting the Pairs polyphylla var. yunnanensis distribution in China at rational scales were selected from related literatures, using the sampling point geographic information from of P. polyphylla var. yunnanensis, combine the maximum entropy model (MaxEnt) with spatial analyst function of ArcGIS software, to study the climate suitability of P. polyphylla var. yunnanensis cultivating region in China and the leading climate factors. The results showed that, average rainfall in August, average rainfall in October, coefficient of variation of seasonal precipitation, the average temperature of the dry season, isothermal characteristic, average temperature in July were the leading climate factors affecting the potential distribution of P. polyphylla var. yunnanensis cultivating region in China, with their cumulative contribution rate reached 97.2% of all candidate climate factors. Existence probability of the region to be predicted of P. polyphylla var. yunnanensis through the constructed model, the climate unsuitable region, low, medium and high region of P. polyphylla var. yunnanensis in China were clarified and the threshold of climatic factors were gave and clarified the climate characteristics of the cultivating region in each climatic suitability division. The results of research can provide reference for production layout and introduction of P. polyphylla var. yunnanensis.

Potential Effects of Desalinated Seawater on Arteriosclerosis in Rats / 生物医学与环境科学（英文）

To evaluate the potential risk of arteriosclerosis caused by desalinated seawater, Wistar rats were provided desalinated seawater over a 1-year period, and blood samples were collected at 0, 90, 180, and 360 days. Blood calcium, magnesium, and arteriosclerosis-related indicators were investigated. Female rats treated with desalinated seawater for 180 days showed lower magnesium levels than the control rats (P < 0.05). The calcium and magnesium levels in female rats and the magnesium level in male rats were lower than the levels in the controls, following treatment with desalinated seawater for 360 days (P < 0.05). Blood levels of arteriosclerosis-related lipid peroxidation indicators and C-reactive protein (CRP) in the treatment group did not differ from those in the controls. The levels of lipid peroxidation indicators and CRP in rats were not significantly affected by drinking desalinated seawater, and no increase in risk of arteriosclerosis was observed.

Research advance of functional plant pharmaceutical cycloartenol about pharmacological and physiological activity / 中国中药杂志

Cycloartenol, a phytosterol compound, also one of the key precusor substances for biosynthesis of numerous sterol compounds, has a variety of pharmacological activities such as anti-inflammatory, anti-tumor, antioxidant, antibiosis and anti-alzheimer's disease. Furthermore, cycloartenol also plays an important role in the process of plant growth and development. This article reviewed the research progress on cycloartenol pharmacological activity in domestic and foreign articles, and summarized the effect of cycloartenol and "cycloartenol pathway" on the plant growth and development, laying foundation for the its further study, development and utilization.

A Bayesian Stepwise Discriminant Model for Predicting Risk Factors of Preterm Premature Rupture of Membranes: A Case-control Study / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Preterm premature rupture of membrane (PPROM) can lead to serious consequences such as intrauterine infection, prolapse of the umbilical cord, and neonatal respiratory distress syndrome. Genital infection is a very important risk which closely related with PPROM. The preliminary study only made qualitative research on genital infection, but there was no deep and clear judgment about the effects of pathogenic bacteria. This study was to analyze the association of infections with PPROM in pregnant women in Shaanxi, China, and to establish Bayesian stepwise discriminant analysis to predict the incidence of PPROM.</p><p><b>METHODS</b>In training group, the 112 pregnant women with PPROM were enrolled in the case subgroup, and 108 normal pregnant women in the control subgroup using an unmatched case-control method. The sociodemographic characteristics of these participants were collected by face-to-face interviews. Vaginal excretions from each participant were sampled at 28-36+6 weeks of pregnancy using a sterile swab. DNA corresponding to Chlamydia trachomatis (CT), Ureaplasma urealyticum (UU), Candida albicans, group B streptococci (GBS), herpes simplex virus-1 (HSV-1), and HSV-2 were detected in each participant by real-time polymerase chain reaction. A model of Bayesian discriminant analysis was established and then verified by a multicenter validation group that included 500 participants in the case subgroup and 500 participants in the control subgroup from five different hospitals in the Shaanxi province, respectively.</p><p><b>RESULTS</b>The sociological characteristics were not significantly different between the case and control subgroups in both training and validation groups (all P > 0.05). In training group, the infection rates of UU (11.6% vs. 3.7%), CT (17.0% vs. 5.6%), and GBS (22.3% vs. 6.5%) showed statistically different between the case and control subgroups (all P < 0.05), log-transformed quantification of UU, CT, GBS, and HSV-2 showed statistically different between the case and control subgroups (P < 0.05). All etiological agents were introduced into the Bayesian stepwise discriminant model showed that UU, CT, and GBS infections were the main contributors to PPROM, with coefficients of 0.441, 3.347, and 4.126, respectively. The accuracy rates of the Bayesian stepwise discriminant analysis between the case and control subgroup were 84.1% and 86.8% in the training and validation groups, respectively.</p><p><b>CONCLUSIONS</b>This study established a Bayesian stepwise discriminant model to predict the incidence of PPROM. The UU, CT, and GBS infections were discriminant factors for PPROM according to a Bayesian stepwise discriminant analysis. This model could provide a new method for the early predicting of PPROM in pregnant women.</p>

Investigation, collation and research of traditional Dai medicine of China / 中国中药杂志

In order to find out the composition, characteristics and traditional utilization characteristics of Dai medicine and promote the rational protection, inheritance and utilization of the resources and traditional knowledge of Dai medicine in China, the resources of traditional Dai medicine have been investigated systematically and the traditional knowledge of Dai medicine have been analyzed in the article. We found out that there were altogether 1 077 kinds of traditional Dai medicine in China and among which 272 were the first time recorded in the condition of Dai folk medical uses. There were 1 053 plant medicines which belong to 169 family and 694 genus. These plant medicines mainly distributed in the southern, west southern and east southern area of Yunnan province, the southern area of Guangxi, Guangdong, Guizhou, Sichuan, Fujian province and tropical, subtropical district as Taiwan, and more than 94.49% plant medicines could be found in Yunnan province. From the point of plant life form, they were major herbaceous or shrubby plants; When it is used as medicinal part, root and rhizome of plants account for the highest proportion, the next were whole plant and leaves. From nature, flavor and channel tropism points of view, the largest proportion of Dai medicines were cool, bitter-tasted and possesses water element. In terms of treatment of disease types, most of the drugs can treat gastrointestinal diseases, next were drugs that could be used to treat upper respiratory infection, traumatological and rheumatic diseases, urinary infection, gynecological diseases, hepatopathy, puerperium fever and diseases caused by poisonous insects and beast of prey bite. The study revealed that the resources of traditional Dai medicine and traditional knowledge of application were abundant in China, but the resources of traditional Dai medicine and traditional knowledge of application were faced with the risk of gradually reduce and loss. The article suggested that we should take measures to strengthen the study of protection and utilization of important traditional Dai medicine and endangered resources along with the protection and transmission of traditional knowledge of Dai nationalistic medicine.

Expression of XPG Gene in Forensic Age Estimation / 法医学杂志

OBJECTIVES@#To explore the expression of xeroderma pigmentosum complementation group G （XPG） gene in healthy Han population of different ages and to analysis the relationship between the mRNA and protein expression levels of XPG and age, which may provide a new molecular-biological indicator for forensic age determination.@*METHODS@#Total 150 samples of peripheral blood were collected from healthy Han population of different ages. Total RNA of peripheral blood mononuclear cell （PBMC） were extracted by TRIzol method, and the relative expression of XPG mRNA in PBMC was detected by quantitative real-time PCR, and the protein expression levels of XPG in plasma were detected by ELISA.@*RESULTS@#The mRNA and protein expression levels of XPG in ≤18 years old group were significantly different from 19-45 years old group and ≥46 years old group （P<0.05）, while there was no significant difference between 19-45 years old group and ≥46 years old group （P>0.05）. No significant sex differences were observed in mRNA and protein expression levels of XPG （P>0.05）.@*CONCLUSIONS@#The relative expression level of XPG mRNA in PBMC declines with the increase of age in younger age, while the protein expression level in plasma increases with age, and XPG gene can be used as one of new markers for forensic age estimation.

Effect of Acupuncture Combined Physical Training and Relearning on Stroke Rehabilitation: a Multi-center Randomized Controlled Clinical Study / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To observe the effect of acupuncture combined physical training and relearning on stroke patients.</p><p><b>METHODS</b>A multi-center, randomized controlled trial design was adopted. A total of 364 stroke patients were recruited and randomly assigned to the experimental group (184 cases) and the control group (180 cases). Patients in the experimental group received acupuncture combined with physical training and relearning, while those in the control group only received physical training and relearning. All received four weeks of treatment. Effects on Fugl-Meyer motor function, neurological impairment, activities of daily living difference were compared before treatment, after treatment, 2 and 5 months after follow-ups between the two groups.</p><p><b>RESULTS</b>Totally 353 patients completed this trial, 179 in the experimental group and 174 in the control group. (1) compared with before treatment, brief Fugl-Meyer motor functions scores and FIM scored obviously increased, and scores for neurological impairment obviously decreased in the two group. Besides, the increment of brief Fugl-Meyer motor functions scores and FIM scores was obviously higher in the experimental group than in the control group at month 2 and 5 of follow-ups; scores for neurological impairment was obviously lower in the experimental group than in the control group. The increment of FIM scores was obviously higher in the experimental group than in the control group at month 5 of follow-ups (P < 0.05, P < 0.01). (2) There was statistical difference in inter-group comparison of total Fugl-Meyer motor functions scores and FIM scores, or scores for neurological impairment (P < 0.01). The improvement of Fugl-Meyer motor functions grading and neurological impairment grading was obviously superior in the experimental group at month 2 and 5 of follow-ups. The distribution of FIM grading was also better in the experimental group at month 5 of follow-ups (P < 0.05, P < 0. 01).</p><p><b>CONCLUSIONS</b>Both acupuncture combined exercise training and relearning and physical training and relearning could effectively promote the rehabilitation of stroke patients, reduce their neurological impairment degrees, improve motor functions and independent capacities. Better long-term efficacy could be obtained by acupuncture combined exercise training and relearning.</p>

Advances in research and development of universal influenza vaccines / 病毒学报

Vaccination is the primary strategy for the prevention and control of pandemic influenza. Because influenza virus is highly variable across strains, universal influenza vaccines need to be developed to address this problem. This review describes the research progress in conserved epitopes of influenza virus, the advances in the research and development of universal influenza vaccines based on the relatively conserved sequences of NP, M2e, HA2, and headless HA, the mechanisms of cross-protection, and the methods to improve cross-protection.

Comparison between content of saponins of Paris polyphylla var. yunnanensis in different areas of Yunnan province / 中国中药杂志

Six kinds of saponins (I, II, VII, PA, H) content of 22 samples of Paris polyphylla var. yunnanensis collected from different regions of Yunnan province were determined by HPLC, data was analyzed by SPSS 17. The results showed that the effect of altitude on saponin content was not significant, and the effect of growth area of saponins in P. polyphylla var. yunnanensis was significant, saponin content in sample from west Yunnan was significantly higher than that of samples from other regions.

Original plant identification of Dai nationality herb "Daibaijie" / 中国中药杂志

<p><b>OBJECTIVE</b>To identify the original plant of "Daibaijie", commonly used Dai herb.</p><p><b>METHOD</b>The literature review, morphology and anatomy, pharmacognosy, molecular biology, chemistry were used to analysis.</p><p><b>RESULT</b>Daibaijie's historical scientific name, Dregea sinensis Hemsl., was mistakenly given "Daibaijie" and D. sinensis have significant differences from the distribution, morphology and anatomy, pharmacognosy, molecular biology and chemical composition. "Daibaijie" matches with the characteristics of Marsdenia tenacissima (Roxb.) Moon in Flora of China in English.</p><p><b>CONCLUSION</b>Daibaijie's original plant is M. tenacissima (Roxb.) Moon. The description and illustration of M. tenacissima (Roxb.) Moon in Flora of China in China are wrong. The illustration of M. tenacissima in Flora of China in English is wrong too.</p>

Construction and immunological responses of recombinant adenovirus containing Epstein-Barr nuclear antigen 1 in mice / 病毒学报

This study aimed to construct recombinant adenovirus expressing Epstein-Barr nuclear antigen 1 (EBNA1) against nasopharyngeal carcinoma (NPC). The C-terminal region fragment of the ebna1 gene of Epstein-Barr virus was amplified from the standard strain B95-8 by polymerase chain reaction (PCR). The gene fragment was inserted into the pDC316 shuttle plasmid using the EcoRI and BgIII restriction enzyme sites. The pDC316-ebna1 shuttle plasmid and pBHG helper plasmid were cotransfected into HEK293 cells after sequencing. The soluble protein was extracted from HEK293 cells, which caused apparent cytopathic effects. The transcription and expression of the ebna1 gene were confirmed using flow cytometry and Western blotting. rAd-ebna1 titers were measured by the TCID50. rAd-ebna1 was injected into BALB/c mice at a dose of 2 x 10(8) VP per mouse, EBNA1 epitope-specific responses were measured at 1st, 2nd, 4th and 8th weeks post-immunization. The target fragment of ebna1 (939 bp) was obtained by PCR, and was in consensus with the sequence from the standard strain B95-8. Cytopathic effects were observed after the pDC316-ebna1 shuttle plasmid and pBHG helper plasmid were cotransfected into HEK293 cells. rAd-ebna1 was successfully recombined in HEK293 cells. EBNA1 protein was detected in HEK293 cells, rAd-ebna1 titers reached 10(8) TCID50/mL. Specific responses to CD4+ epitopes of EBNA1 were detected in the immunized mice. In conclusion, rAd-ebna1 was successfully constructed and induced specific responses to CD4+ epitopes of EBNA1 in immunized mice.

Evaluation of influenza A virus nucleoprotein based on baculovirus surface-display technology / 病毒学报

Nucleoprotein (NP) of influenza virus is highly conserved and type-specific. NP can trigger strong cell-mediated immune responses in host and is involved in the protection against the challenges with different subtype influenza viruses. Here, NP of an avian H5N1 (A/Hubei/1/2010, HB) was expressed by baculovirus surface-display technology and its immunogenicity as well as protective mechanism was investigated in mice infection model. Western blot and immunolabeled electron microscopy assay showed NP was displayed on baculovirus surface. ELISA results showed NP could induce high level of anti-NP IgG in the sera from NP-Bac-inoculated mice. Two cellular immune peptides (NP57-74 IQNSITIERMVLSAFDER and NP441-458 RTEIIKMMESARPEDLSF) were identified by IFN-gamma ELISPOT assay. NP57-66 and NP441-450 and NP protein could be able to trigger the activation of CD4+ and CD8+ T cells, and the response of CD8+ T was more predominant. The challenge study of mice-adapted virus A/PR/8/34 (H1N1) showed that NP-Bac could reduce viral load and attenuate the damage to lung tissue. 50% protection ratio against the virus could be detected.

Expression and clinical significance of IKZF1 gene IK6 isoform in adult acute lymphoblastic leukemia / 中国实验血液学杂志

This study was aimed to detect the expression of IKZF1 gene isoforms in bone marrow cells of patients with adult acute lymphoblastic leukemia and to investigate the clinical characteristics and prognosis of patients with IK6 isoform. The expression of IKZF1 gene isoforms were measured by nested RT-PCR in 79 newly diagnosed ALL patients. The clinical characteristics of IK6 positive patients and overall survival, disease-free survival of the IK6 positive group and IK6 negative group were compared. The results showed that IK1 and IK2/3 were the functional isoform while the IK4, IK6, IK8 and IK9 were the dominant negative isoform in adult ALL. The dominant negative isoform IK6 accounted for 34.4% in B-ALL patients and accounted for 22.2% in T-ALL patients. The BCR/ABL1 positive rate and the percentage of high risk patients in IK6 positive group was higher than that of IK6 negtive group in B-ALL patients (P = 0.027, P = 0.048). The expression of IK6 isoform did not correlate with sex, age and WBC count of B-ALL and T-ALL patients. The overall survival and disease-free survival of IK6 positive group were both lower than that of IK6 negtive group in Ph negative B-ALL patients (P = 0.009, P = 0.002). It is concluded that IK6 is a main isoform of the expression of IKZF1 gene in adult ALL patients, and can be used as a prognostic factor for guiding treatment in Ph negative B-ALL patients.