Objective From May 2009-January 2010,a total of 3768 biosamples were tested for influenza A ( H1N1 ) infection at Zhengzhou center for disease control and prevention,China.1452 cases were laboratory confirmed H1N1 infection and 2316 were considered suspected victims.To evaluate the current protocol of influenza A (H1N1) based on the epidemic situations of Zhengzhou,relationships among features were explored and whether additional clinical characteristics should be part of H1N1 diagnosis protocols were determined.Methods Both clinical and epidemiologic findings as well as statistical analyses were described in this article.Test for independence between features related to the disease diagnosis has been proposed.Furthermore,logistic regression was carried out to measure the association among features and latent class analysis was performed to identify additional crucial features in laboratory confirmed H1N1 by building various latent models with different combinatorial features.Results The mean generation time for H1N1 was estimated as 3.59 ± 1.41 days (range =2.01 -7.26).The estimated infection rate was 0.258 ±0.088 3,and reproduction number was 1.94 (95％ CI =1.12 - 3.18 ).Our results revealed that the six features,including molecular detections using three separate primer/probe sets,gender,age and temperature,are all associated with clinical diagnosis of H1N1,and that three separate primer/probe sets for laboratory confirmed H1N1,age and temperature are associated with each other.Conclusion Additional clinical features applied into the H1N1 diagnosis with current three primers/probe sets can increase the diagnostic efficiency.

Objective: To study the biocompatibility of CFR/PEEK composite in bone tissue after implanted in lumbar intervertebral space and to evaluate its role in the interbody fusion compared to the allograft bone. Methods: Thirteen beagles were chosen among which 7 were implanted with the disk-like CFR/PEEK composite in the lumbar intervertebral space and the other 6 were implanted with allograft bone. X-ray, QCT and histological examination were employed at 6, 12 and 24 months postoperatively. Results: The X-ray results of fusion segment were in conformity with the QCT's as well as that of histological results. All animals obtained a complete fusion at 24 months. Histological examination revealed that the anterior soft tissue to the implant exhibited a nonspecific foreign body reaction with connective tissue embed the biomaterials. Carbon fragment were seen in the surrounding tissue and some of the debric were phagocytosed by foreign body giant cell. Histological examination of bone and material revealed that new bone grew along the hole of CFR/PEEK implant. Conclusion: CFR/PEEK has an excellent biocompatibility to bone tissue.

OBJECTIVE: To investigate the influence of pre-pregnancy parental body mass index (BMI), maternal weight gain during pregnancy, and their interaction on neonatal birth weight. METHODS: A total of 1 127 pregnant women who underwent regular prenatal examinations and full-term singleton delivery in the First Hospital of Xi'an Jiaotong University from January 2017 to October 2018 were enrolled. The data on their pre-pregnancy BMI, maternal weight gain during pregnancy, pre-pregnancy BMI of the husband, and neonatal birth weight were collected. The interaction between pre-pregnancy parental BMI and maternal weight gain during pregnancy was analyzed, and their correlation with neonatal birth weight was analyzed. RESULTS: Among the 1 127 full-term neonates, the detection rates of low birth weight neonates and macrosomia were 2.22% (25/1 127) and 3.82% (43/1 127) respectively. There were significant differences in pre-pregnancy parental BMI and maternal weight gain during pregnancy among the low birth weight, normal birth weight, and macrosomia groups (P<0.05). Neonatal birth weight was positively correlated with pre-pregnancy parental BMI and maternal weight gain during pregnancy (r=0.097-0.322, P<0.05). Low maternal weight before pregnancy increased the risk of low birth weight (RR=4.17, 95%CI: 1.86-9.38), and maternal overweight/obesity before pregnancy (RR=3.59, 95%CI: 1.93-6.67) and excessive weight gain during pregnancy (RR=3.21, 95%CI: 1.39-7.37) increased the risk of macrosomia. No interaction between pre-pregnancy maternal BMI and maternal weight gain during pregnancy was observed. CONCLUSIONS Pre-pregnancy parental BMI and maternal weight gain during pregnancy are related to neonatal birth weight, and there is no interaction between pre-pregnancy maternal BMI and maternal weight gain during pregnancy.
Birth Weight ; Body Mass Index ; Female ; Gestational Weight Gain ; Humans ; Infant, Newborn ; Pregnancy ; Pregnancy Complications ; Risk Factors ; Weight Gain

OBJECTIVETo study the epidemic status of human immunodeficiency virus type 1 (HIV-1) subtypes in Shenzhen and to study their transmission source and routes.

METHODSHIV-1 env and gag genes were amplified by nested PCR from uncultured peripheral blood mononuclear cells (PBMCs) obtained from 122 HIV-1 carriers confirmed in Shenzhen. The C2-V3 region (about 450 bp) of HIV-1 env and P17/ P24 region were sequenced.

RESULTSAmong 122 samples, 6 HIV-1 strains including 3 circulating recombinant forms (CRFs) of CRF01_AE, CRF08_BC, CRF07_BC and 3 subtypes of B', B, C were found in Shenzhen, and the percentages were 45.1% (55/122) for CRF01_AE, 31.1% (38/122) for CRF08_BC, 6.6% (8/122) for CRF07_BC, 14.8% (18/122) for B' subtype, 1.6% (2/122) for B subtype, and 0.8% (1/122) for C subtype. The intragroup genetic distances were (4.455 +/- 1.478)%, (2.997 +/- 1.345)%, (4.380 +/- 2.024)%, (5.186 +/- 2.487)%, and (4.869 +/- 2.638)%, respectively. In comparison with the sequence of respective international strains 01AE. TH. 90. CM240, 97CNGX-9F, CN. 97. C54A, B. US. 83. JRFL, and RLA2, the genetic distances were (5. 228 +/- 0.823)%, (3.634 +/- 1.073)%, (4.233 +/- 1.119)%, (4.950 +/- 2.564)%, and (5.795 +/- 2.198)%, respectively. The major subtypes found in injection drug users (IDUs) were CRF07_BC, CRF08_BC, and CRF01_AE strains. CRF01_AE and B' strains were epidemic mainly in sexual workers.

CONCLUSIONThere are 3 HIV-1 subtypes (B', B, C) and 3 CRFs (CRF01_AE, CRF08_BC, CRF07_BC) epidemics in Shenzhen. The predominant subtypes varies among different transmission routes. While CRF01_AE is predominant among sexual workers, CRF08_BC and CRF01_AE are major subtypes among IDU population.

Adolescent ; Adult ; China ; epidemiology ; Female ; Genes, env ; genetics ; Genes, gag ; genetics ; Genes, pol ; genetics ; HIV Infections ; epidemiology ; HIV-1 ; genetics ; Humans ; Male ; Middle Aged ; Molecular Epidemiology ; Polymerase Chain Reaction

OBJECTIVETo investigate the effect of ketamine on the high-voltage-activated calcium currents (ICa(HVA)) in rat hippocampal neurons.

METHODSNeurons were cultured from Wistar rat hippocampus. ICa(HVA) was recorded using whole-cell patch clamp technique. After application with ketamine at different concentrations (10, 30, 100, 300, and 1000 μmol/L), the effect of ketamine on ICa(HVA) was evaluated.

RESULTSICa(HVA) was inhibited by ketamine in a concentration-dependent manner. Ketamine at 10 μmol/L showed no effect on ICa(HVA). Four concentrations of ketamine (30, 100, 300,and 1000 μmol/L) reduced the peak ICa(HVA) currents by (17.5 ∓ 4.5)%, (25.5 ∓ 6.9)%, (38.5 ∓ 4.1)%, and (42.3 ∓ 4.6)% respectively,with a mean half maximal inhibitory concentration of 68.2 μmol/L and Hill coefficient of 0.47. The maximal activation membrane potential was shifted to (5.3 ∓ 0.8) from (5.4 ∓ 0.9). The half maximal activation membrane potential of inactivation curve was shifted from(-26.7 ∓ 3.9) mV to(-32.8 ∓ 4.2) mV.

CONCLUSIONKetamine can remarkably inhibit calcium currents in the central neurons,which may explain at least partly the action of ketamine on central nervous system.

Animals ; Calcium Channels ; drug effects ; physiology ; Cells, Cultured ; Hippocampus ; drug effects ; physiology ; Ketamine ; pharmacology ; Membrane Potentials ; drug effects ; Neurons ; drug effects ; physiology ; Rats ; Rats, Wistar

OBJECTIVETo investigate the changes of the endogenous hydrogen sulfide(H2S) system in pulmonary hypertension induced by hypoxic hypercapnia (HHPH) in rats and approach the possible mechanisms.

METHODS20 SD rats were randomly divided into control group (C) and hypoxic hypercapnia group (HH) (n=10). The changes of hemodynamics and the right ventricle/left ventricle + septum (RV/LV + SP) were measured. The ratio of vessel wall area and total area (WA/TA) of arteriae pulmonalis were observed under lightmicroscope. By using TdT-mediated dUTP nick end labeling (TUNEL) and immunocytochemistry techniques, apoptosis index (AI) and expression of Bcl-2, Bax protein in arteriae pulmonalis were tested. Plasma level of H2S and activity of H2S generating enzymes in homogenates of rat lung tissue were evaluated by sensitive modified sulfide electrode method. Cystathionine-gamma-lyase (CSE) mRNA in lung tissues was determined by RT-PCR.

RESULTSThe level of mean pulmonary arterial pressure(mPAP), WA/TA and RV/LV + SP were significantly higher in HH group than those in C group (P < 0.05 or P < 0.01). Compared with those in C group, the AI of arteriae pulmonalis in HH group were significantly lower; the expression of Bcl-2 protein increased while that of Bax protein decreased, and the ratio of Bax/Bcl-2 went up obviously (all P < 0.01). Plasma level of H2S, the activity of H2S generating enzymes and CSE mRNA in HH group were significantly lower than those in C group (all P < 0.01). Plasma level of H2S, the activity of H2S generating enzymes, CSE mRNA each was closely positively related to Al while inversely related to mPAP and Bcl-2/Bax (all P < 0.01).

CONCLUSIONThe endogenous hydrogen sulfide system is closely related to pulmonary hypertension induced by hypoxic hypercapnia. The depression of the H2S/CSE system in HHPH may help increase the ratio of Bcl-2/Bax, inhibit apoptosis of pulmonary artery smooth muscle cells and finally result in the formation of pulmonary hypertension.

Animals ; Apoptosis ; physiology ; Hydrogen Sulfide ; metabolism ; Hypercapnia ; complications ; physiopathology ; Hypertension, Pulmonary ; etiology ; physiopathology ; Hypoxia ; complications ; physiopathology ; Male ; Muscle, Smooth, Vascular ; pathology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; Rats, Sprague-Dawley ; bcl-2-Associated X Protein ; metabolism

OBJECTIVETo study how CCR5delta32, CCR5m303, CCR2-64I, SDF1-3'A gene polymorphisms affect the prognosis of Chinese HIV-1 carrier.

METHODSEpidemiologic survey was done to the HIV-1 carriers who were found in Shenzhen area. PCR/RFLP technology was applied to analyze CCR5delta32, CCR5m303, CCR2-64I, SDF1-3'A gene polymorphisms of the HIV-1 carriers. The plasma virus load and CD4+ cell counting was assayed. The incubation period of some carriers was estimated. SPSS11.0 software was used to analyze the data.

RESULTSNo persons with CCR5delta32 and CCR5m303 mutation genotype were found from 189 HIV-1 carriers. SDF1-3'A allele frequency was 26.14% and CCR2-64I allele 19.82%. The carriers were divided into high virus load group (virus load < 20,000 copies/ml) and low virus load group (virus load > or =20,000 copies/ml). It was found by one-way ANOVA analysis on the logarithm of virus load that there was no significant difference between CCR2-64I wild genotype and cross bred genotype (P=0.272). One-way ANOVA analysis on delitescence of some carriers showed that there was not significant difference between CCR2-64I wild genotype and cross bred genotype (P=0.662). One-way ANOVA analysis on the logarithm of virus load showed that there was significant difference among SDF1-3'A wild genotype, cross bred genotype and pure mutation genotype (P=0.001).

CONCLUSIONCCR2-64I gene mutation may not significantly affect virus load of Chinese HIV-1 carriers, nor it affect the incubation period of HIV-1 carriers. SDF1-3'A gene mutation can decrease virus load, but it may not prolong the incubation period of HIV-1 carriers.

Acquired Immunodeficiency Syndrome ; genetics ; pathology ; virology ; Carrier State ; Chemokine CXCL12 ; genetics ; China ; Gene Frequency ; Genotype ; HIV-1 ; Heterozygote ; Humans ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Polymorphism, Restriction Fragment Length ; Prognosis ; Receptors, CCR5 ; genetics

OBJECTIVETo observe the status of AKT and phospho-AKT (pAKT) in three diffuse large B cell lymphoma (DLBCL) cell lines, and to investigate the effects of AKT activation on biologic behavior of DLBCL cells.

METHODSThree DLBCL cell lines, ly1, ly8 and ly10 were maintained in 10% FBS or serum free culture medium. The expression of AKT and status of pAKT were detected by Western blotting. LY294002, an inhibitor of PI3K, was used to suppress the level of pAKT. Flow cytometry combined with PI staining, AnnexinV-FITC assay and Brdu incorporation assay were used to analyze the parameters of the cell cycle, apoptosis and proliferation respectively.

RESULTSThere was constitutive activation of AKT in three DLBCL cell lines and the levels of pAKT were altered in the different environments. In 10% FBS culture medium, pAKT was higher than that in serum free culture medium in ly8 and ly10, however, pAKT in ly1 maintained in serum free culture medium was mildly higher than that in 10% FBS culture medium. When the cell lines ly1, ly8, ly10 were maintained in 10% FBS culture medium, the inhibitor LY294002 suppressed the level of pAKT efficiently in three DLBCL cell lines. The percentage of cells at S phase and the proliferation index were significantly decreased (P < 0.05) without an increase of apoptosis (P > 0.05).

CONCLUSIONSActivation of AKT may play an important role in the development of DLBCL. It is closely related to the control of cell cycle and proliferation, but is not associated with apoptosis. LY294002 can inhibit cell growth by decreasing the levels of pAKT in DLBCL cell lines.

Apoptosis ; Cell Cycle ; drug effects ; Cell Line, Tumor ; Cell Proliferation ; drug effects ; Chromones ; pharmacology ; Culture Media, Serum-Free ; Enzyme Activation ; Humans ; Lymphoma, Large B-Cell, Diffuse ; metabolism ; pathology ; Morpholines ; pharmacology ; Phosphatidylinositol 3-Kinases ; antagonists & inhibitors ; Phosphorylation ; drug effects ; Proto-Oncogene Proteins c-akt ; metabolism

OBJECTIVETo investigate the effects on chemotherapeutic sensitization of the PI3K inhibitor LY294002 in diffuse large B cell Lymphoma (DLBCL) cell lines ly1, ly8, ly10.

METHODSThe three cell lines were treated with LY294002, or doxorubicin alone or combined or sequentially respectively. Western blotting was used to detect the level of phospho-AKT after the treatment. Flow cytometry combined with annexin V-FITC assay and Brdu incorporation assay were used to analyze the alterations of cell cycle, proliferation, and apoptosis, respectively.

RESULTSLY294002 decreased the level of phospha-AKT efficiently in the three DLBCL cell lines. The ratio of S phase cells was significantly decreased (P < 0.05). Sequential use of LY294002 and doxorubicin increased the ratio of apoptosis and there was significant difference between the sequential group and the other four groups (P < 0.05) at 24, 48, 72(ly1), 48, 72 (ly8) or 24 h (ly10).

CONCLUSIONLY294002 can sensitize doxorubicin-induced apoptosis and may be a potential molecular therapeutic agent targeted at AKT signaling pathway in DLBCL.

Apoptosis ; drug effects ; Cell Line, Tumor ; Humans ; Lymphoma, Large B-Cell, Diffuse ; Phosphatidylinositol 3-Kinases ; antagonists & inhibitors ; Proto-Oncogene Proteins c-akt ; metabolism

OBJECTIVETo analyze the natural change rule of active components of E. purpuea by measuring content of cichoric acid.

METHODReverse HPLC method was used.

RESULTThe maximum cichoric acid content of the roots occured in seedling age of May, and that of the flowers occured in blooming stage of mid July, but cichoric acid in stems was generally low anyway. The maximum content of cichoric acid in the plant above ground occured in the blooming stage of mid July.

CONCLUSIONThe measuring method of content of cichoric acid is successful and reliable. The optimum stage of harvest in Echinacea purpuea should be guided by natural change rule of cichoric acid content.

Caffeic Acids ; analysis ; Echinacea ; chemistry ; Flowers ; chemistry ; Plant Components, Aerial ; chemistry ; Plant Roots ; chemistry ; Plants, Medicinal ; chemistry ; Seasons ; Succinates ; analysis