Objective To analyse the correlation of apolipoprotein E genotype and Alzheimer's disease(AD) in old population in Urumqi.Methods The polymerase chain reaction and restriction fragment length polymorphism(PCR-RFLP) techniques were used to detect the distribution of genotype, gene frequency of ApoE alleles in 60 cases with sporadic AD and 90 normals as control.Results The frequency of ApoE?2, ApoE?3, ApoE?4 was 6.67%, 75.83% and 17.50% respectively in AD group, while in control group, it was 13.33%, 79.45% and 7.22% respectively. The frequency of ApoE?4 allele in AD group was higher than that in control group( P

Objective To investigate the genetic relationship of the Dengue virus strains isolated in Guangdong province in 2006 and 2007, and to find the sources of these virus. Methods Serum samples of the dengue fever patients from 5 cities of Guangdong province in 2006 and 4 cities in 2007 were collected. Three pairs of primers that specific for amplifying the 3 overlap fragments of E gene of Dengue virus type Ⅰ were designed. RNAs were extracted from C6/36 cells treated with patients' serum. E genes were amplified by RT-PCR, purified and then sequenced directly. To obtain the E gene complete sequences, the raw sequences were assembled and edited. Obtained E genes were compared with E genes of other Dengue virus type Ⅰ published in the GenBank, analyzed by MEGA version 4.1 software. Results In 2006, virus circulating in Guaogzhou2006(EF508203) was closest to Vietnam2006(EU482539) with 99.3% nucleotides homology, Chaozhou2006 (EF508206) and Shantou2006 (EF508207) strains were closest to Japan2004 (AB178040) and Singapore2006 (EU081280) with 99.5% nucleotides homology, while Yangjiang2006 (EF508205) and Yangjiang2001 (EF508200) were closest to each other and both with 99.5% nucleotides homology to Thailand2001 (AY732482). All 4 Dengue virus strains circulated in 2007 were closest to Singapore2005(EU081276) with 99.7% nueleotides homology. Conclusion The Dengue viruses prevalent in 2006 were from different sources while those in 2007 came from the same origin. The data also showed that there was an endemic area of Dengue virus in Guangdong province.

Gene analysis of the first family with ?-thalassemia in Xinjiang was carried out by polymerase chain reaction (PCR) in combination with dot blot hybridization of allele -specific oligonucleotide (ASO) probes. Seven of the 12 family members were heterozygous for the IVS- Ⅱ-654 (C→T) mutation. The abnormal ? gene of proband was confirmed from the paternal side according to family survey, clinical syndrome and hematological data.

The nitrate-N content in KNO3 solution and soil was rapidly predicted using techniques of mid-infrared spectroscopy, in which 15 NO-3 and 14 NO-3 were distinguished and predicted. The results showed that the characteristic band of nitrate in solution and soil was 1200-1500 cm-1 , and compared with 14 NO-3 , the red shift of characteristic band of 15 NO-3 was about 35 cm-1 . In the characteristic band of nitrate, absorption band increased with the nitrate nitrogen concentration with less interference absorption. The linear regression was made between the first principal component of characteristic band and nitrate-N content, and correlation coefficient was more than 0 . 9840 , indicating that the technique of mid-infrared attenuated total reflectance spectroscopy could be applied for rapid monitoring of nitrate in solution and soil. Meanwhile, based on the red shift characteristic of 15 NO-3 absorption band, the method of partial least squares were involved to predict the nitrate-N of different N-isotope labeled in solution and soil, resulting that all the prediction models reached excellent levels. For 14 NO3-N and 15 NO3-N in solution, the correlation coefficients ( R2 ) were 0. 9980 and 0. 9982 respectively, and ration performance to standard deviations ( RPD ) were 6. 44 and 4. 76, respectively. While for 14 NO3-N and 15 NO3-N in soil, the correlation coefficients ( R2 ) were 0. 9794 and 0. 9679, and RPD were 5. 75 and 4. 78, respectively. Therefore, the technique of mid-infrared attenuated total reflectance spectroscopy can be applied for rapid monitoring different N-isotope labeled nitrate in solution and soil, to provide a new in situ and fast time method to study nitrification process in soil.

Soil particles are very heterogeneous in microscopic scale, which is manifested the double-layer structure made of the soil organic matter and mineral matter. In this work, Fourier by transform infrared photoacoustic spectroscopy ( FTIR-PAS) combined with independent component analysis ( ICA) was utilized for in situ depth-profiling of the manmade complex film, in order to lay a foundation of in situ characterizing the heterogeneous soil organic-mineral complex. The complex film was composed of the PE preservative film and office adhesive tape. The moving velocity of infrared photoacoustic spectrometer was set to 0. 16 cm/s, 0. 32 cm/s and 0. 64 cm/s, respectively. Independent component analysis ( ICA ) was performed on the photoacoustic spectra of the heterogeneous complex film. Results showed that the depth-resolved information of the complex film could be derived by changing the moving velocity, and the estimated thickness of PE film was 5. 4-7. 6 μm, which was close to the actual thickness 7 ± 1 μm. Moverover, the spectral features of the polyethylene ( PE) preservative film and office adhesive tape were extracted from the photoacoustic spectra of the heterogeneous complex film by means of ICA. Depth profiling of complex film samples showed that FTIR-PAS could be used as a new analytical tool to study heterogeneous soils, especially soil organic-mineral complexes.

Objective To explore the diagnostic value of morphology in patients with blastic plasmacytoid dendritic cell leukemiafrom bone marrow cell.Methods Clinical data of 5 patients with BPDCN leukemia in Peking Union Medical College Hospital from 2011 to 2016were collected.The morphological characteristics of the cell size,nuclei,chromatin and cytoplasm of the BPDCNtumor cells in the bone marrow smears were observed under the microscope.Results The clinical manifestation of the 5 cases involved skin lesions (5/5,100％),lymphadenopathy (4/5,80％),hepatomegaly (3/5,60％),splenomegaly (4/5,80％).Immunophenotype showed all cases were positive for CD4,CD56 and CD123.The morphologiesof BPDCN cell characterized by heterogenous clls,were frequent,including,frequent mediumsized cells with a round or irregular nucleus,lacy chromatin,basophilic cytoplasm with lack of granules,marked large pseudopodia and vacuolation which may arranged as pearl necklace along the cytoplasmic outline.They might mimicking pseudomonoblast,Pseudolymphoblast or Pseudolymphoma cell.Conclusions Plasmacytoid dendritic cells had some peculiar morphological features,the patients suffered from the clinical manifestation of skin lesion may highly suggested the diagnosis of BPDCN,Flow cytometry and pathological biopsy are necessary for the final diagnosis of BPDCN.

Objective To explore the preparation and quality control of As2 O3 nanoparticle .Methods PEG‐PLA was used as the vector material to prepare As2 O3 nanoparticle with ultrasonic emulsification method ,and the VEGFR‐2 was coupled to obtain VEGFR‐2/As2 O3‐PEG‐PLA nanoparticle .The particle size distribution ,Zata potential ,loading efficiency (LE) ,encapsulation effi‐ciency(EE) ,drug release in vitro and stability was determined ,and morphological characteristics was observed by transmission elec‐tron microscope(TEM) .Tweety‐four hepatocellular carcinoma nude mices were randomly divided into VEGFR‐2/As2O3‐PEG‐PLA nanoparticles group and As2 O3‐PEG‐PLA nanoparticles group ,by tail vein injection of nanoparticles .High performance liquid chro‐matography was used to determine content of As2 O3 .After 21 d ,six nude mices in each group were killed ,and the immunohisto‐chemistry and western blot method was used to detect the expression of VEGFR‐2 .Results The particle size of VEGFR‐2/As2 O3‐PEG‐PLA was determined to be (141 .9 ± 13 .2)nm ,Zata potential was (10 .2 ± 1 .1)mV .It was found to spherical or oval shape , with uniform size and dispersibility under TEM .LE and EE was (5 .51 ± 1 .83)% and (62 .12 ± 5 .98)% ,respectively .Drug release in vitro showed that VEGFR‐2/As2 O3‐PEG‐PLA exhibited controlled release effect ,with half of the release time as 10 h .Besides , VEGFR‐2/As2 O3‐PEG‐PLA showed a good stability in 3 days .Compared with As2 O3‐PEG‐PLA nanoparticles group ,the concen‐tration of As2 O3 in tumor and liver tissue was high ,the concentration of As2 O3 in blood ,heart ,kidney tissue was low ,the expression of VEGFR‐2 in tumor tissue was low in VEGFR‐2/As2O3‐PEG‐PLA nanoparticles group(P< 0 .05) .Conclusion The prepared As2 O3 nanoparticle using PEG‐PLA as vector and VEGFR‐2 as target showed uniform size ,high EE and LE ,good stability .And it preliminarily proved that VEGFR‐2 could be targeted in nude mice .

Objective To establish a method for the isolation of Zika virus and to gather experi-ences for viral isolation. Methods Suckling mice at age 1-3 days were inoculated with serum samples posi-tive for Zika virus through intracranial injection. All mice were sacrificed 6 days after the injection. Viral nu-cleic acids were extracted from brain, heart, liver, spleen, lung, kidney, muscle, skin and intestine tissue samples and analyzed by real-time RT-PCR. The supernatants of brain tissues positive for Zika virus were used for subculturing. Nested PCR was performed to amplify the NS5 gene of the isolated virus. The se-quences of NS5 gene were analyzed by using MEGA6. 0 software. Results All of the tissue samples were positive for Zika virus. Higher viral loads were detected in heart and brain tissue samples with cycle thresh-old (Ct) values of 24. 4 and 25. 3, respectively. The second generation of Zika virus was identified in suck-ling mice brain tissues 2 days after infection by using real-time RT-PCR. The amplified product of nested PCR was 972 bp in length. Sequencing analysis showed that the isolated Zika virus ( GDZ16002 strain) be-longed to the Asian lineage. Conclusion A strain of Zika virus was successfully isolated in China by using intracranial injection via a suckling mouse model. The isolated Zika virus belonged to the Asian lineage.

Objective To assess the clustering of cardiovascular risk factors and their effects on target organ damage in elderly patients with hypertension .Methods 421 treated elderly hypertension patients were divided into 5 groups based on the number of risk factors :hypertension without additional risk factor (group A ,25 cases) ,and the other 4 groups were complicated with 1 (group B ,76 cases) ,2(group C ,127 cases) ,3(group D ,128 cases)and ≥ 4 (group E ,65 cases) risk factors .The structure and function of heart and carotid artery were examined by ultrasonography in order to evaluate the damage of target organ and the morbidity .Re-sults The patient groups with three or more risk factors showed significantly higher levels of BMI ,plasma glucose ,triglyceride , LDL-C cholesterol ,serum creatinine and serum uric acid ,and needed greater number of antihypertensive drugs ,compared with other groups(P<0 .05) .The patient groups with two or more risk factors showed significantly higher levels of LVMI ,IMT and MAU/Cr compared with group A(P<0 .05) ,and significantly lower levels of the creatinine clearance (P<0 .05) .In addition ,they showed significantly higher incidences of coronary heart disease and cerebrovascular disease and chronic kidney disease compared with group A (P<0 .05) .Conclusion These results suggest that the hypertensive patients with clustering risk factors required greater number of antihypertensive drugs .The more additional risk factors exit ,the more target organ damages and higher morbidity occur ,and more intensive intervension are required to control not only blood pressure but also other complicated risk factors .