Torque teno virus(TTV)is a nonenveloped virus containing a single-stranded,circular DNA genome of approximately 3.8kb.We completely synthesized the 3808 nucleotides of the TTV(SANBAN isolate)genome,which contains a hairpin structure and a GC-rich region.More than 100 overlapping oligonucleotides were chemically synthesized and assembled by polymerise chain assembly reaction(PCA),and the synthesis was completed with splicing by overlap extension(SOEing).This study establishes the methodological basis of the chemical synthesis of a viral genome for use as a live attenuated vaccine or gene therapy vector.

Congenital Abnormalities ; economics ; prevention & control ; Cost Control ; Humans ; Public Health Practice ; economics

Objective:To compare the accuracy and safety between percutaneous kyphoplasty (PKP) positioning device and traditional positioning device which posit entry point of pedicle of vertebral arch by using the C-arm X-ray.Methods: 117 patients with spinal centrum compression fractures were divided into positioning device group (57 cases) and Kirschner wire group (60 cases) depended on the entry point marked by the preoperative C arm X-ray irradiation. To compare the excellence rate, operation time and exposure times between PKP positioning device and traditional device.Results: The positioning times of the PKP positioning device group and Kirschner wire group were (2.3±0.9)min and (6.8±1.3)min, respectively. The exposure times of the two group were 1.6 times and 4.7 times, respectively. And both of the two differences were statistical significant (t=21.062,t=18.521;P<0.05). The puncture success rates of the two group were 100%. And the excellence rates of them were 93% and 87%, respectively, and the difference also was statistical significant (x2=2.761,P>0.05).Conclusion: There are series of advantages in developed PKP positioning device, such as portable, easy and simple control, higher accuracy and safety, less positioning time and exposure times of C arm X-ray.

Traditionally it has been widely accepted that our genes together with adult lifestyle factors determine our risk of developing noncommunicable diseases such as type 2 diabetes mellitus ,cardiovascular disease and obesity in lat-er life.Currently, there is substantial evidence that the early life environment plays a key role in determining our suscepti -ble to such diseases in later life .As an increased focus on the understanding of central insulin resistance , central nerve sys-tem plays an extremely important role in regulating the peripheral glucose homeostasis .Substantial studies have indicated that it may be regulated by epigenetic mechanisms .Epigenetics can be defined as the study of heritable changes in gene ex-pression that do not involve alterations in the DNA sequence .Epigenetic processes play a central role in regulating tissue specific gene expression and hence alterations in these processes can induce long -term changes in gene expression and me-tabolism which persist throughout the lifecourse .This review will focus on the epigenetic machanisms of central neuroregula-tion between early life environment and glucose metabolism in adulthood .

Objective To investigate the apoptosis of peripheral blood lymphocyte cells in patients with HAM/TSP and the roles of Fas/FasL system, TNF ? and Bcl 2 protein in occurrence and progression of HAM/TSP Methods The single cell gel electrophoresis (comet assay) was used to detect the apoptosis of lymphocyte cells in patients with HAM/TSP The presence of sFas, sFasL in the serum and cerebrospinal fluid (CSF) of patients with HAM/TSP was evaluated by using an enzyme linked immunosorbent assay (ELISA) The Fas, TNF ? and Bcl 2 protein expressions were quanlitatively determined by flow cytometry from 8 cases of HAM/TSP, and compared with the controls and other inflammatory neurological diseases (OIND) Results (1) The apoptotic ratio of lymphocyte cells in patients with HAM/TSP (13 63%?0 48%) was significantly increased as compared to the controls (1 63%?0 57%, P 0 05) Levels of sFas and sFasL in CSF from patients with HAM/TSP ((0 19?0 07) ng/ml and (0 24?0 08) ng/ml) were both significantly increased than those from OIND ((0 11?0 06) ng/ml and (0 01?0 01) ng/ml, P 0 05) or patients with OIND (34 84?9 63, P

Objective To explore the characteristics of TCM syndromes of acute coronary syndrome(ACS). Methods Clinical data of 127 ACS patients were collected and then a database was established.After that,the distribution of syndrome patterns was analyzed.Results The incidences of the following excess syndrome patterns were in a decreasing sequence:stasis syndrome,phlegm syndrome,cold syndrome and heat syndromes.The incidence of stasis syndrome was 90.5%,which was much higher than other excess syndromes.The incidences of the following deficiency syndrome patterns were in a decreasing sequence:heart-Qi deficiency syndrome,heart-Qi exhaustion syndrome,heart-yin deficiency syndrome,heart-Qi depletion syndrome,heart-kidney deficiency syndrome and heart-blood deficiency syndrome.The incidence of heart-Qi deficiency syndrome was 75.6%,which was much higher than other deficiency syndromes.The incidences of the stasis syndrome and cold syndrome in acute myocardial infarction(AMI)were higher than those in unstable angina(UA),and the incidences of heart-Qi deficiency syndrome and heart-Qi exhaustion syndrome in AMI were higher than those in UA(P

Objective: The current study investigate the immunological reaction state of Th1/Th2 cytokines expression in the peripheral blood mononuclear cells(PBMCs) from patients with lung cancer,and evaluate the effect of astragalus(AG) on it.Methods:The PBMCs from patients were divided into 4 groups:one group as pre-cultured group,and the other cells were cultured with 10%AG,20% AG and without AG (control group) ,respectively.The PBMC from 23 lung cancer patients as well as 19 healthy controls before and after the culture with AG were collected respectively. The Thl/Th2 cytokines expression were detected by RT-PCR considering IFN-r and IL-2 as Th1 cytokines and IL-4,IL-6,IL-10 as Th2 ones. Results:The results showed that the mRNA expression rate of IL-4,IL-6,IL-10 in PBMCs from lung cancer patients was obviously higher than that from the healthy controls( P

ObjectiveMatching pursuit algorithm(MAP),for its good parametric characterization,was applied in epileptic electroencephalography(EEG) to study time-frequency distribution.MethodsSimulation experiment of time-frequency analysis was carried out to verify the matching pursuit algorithm s superiority on frequency resolution and parametric characterization.Fourier transform,Wigner-Ville distribution and matching pursuit algorithm were applied to the time-frequency analysis on normal EEG and epileptic EEG to study epileptic discharge in the time-frequency plane and the results were compared.ResultsSimulation results showed that the matching pursuit algorithm obtained a better time-frequency distribution.Distributions of epileptic EEG and normal EEG had significant difference in time-frequency plane.ConclusionTime-frequency analysis based on matching pursuit can better reveal the EEG characteristics.

OBJECTIVE To study the phenomenon of hepatitis B surface antigen(HBsAg) and antibody(HBsAb) both positive in blood samples.METHODS Using electro-chemo-luminescence immune system E170 to detect HBsAg and HBsAb in clinical samples and retest the both positive cases by another two reagents for HBsAg and another three reagents for HBsAb.RESULTS All 7332 samples showed 140 both HBsAg and HBsAb positive(1.9%) and 73 of them were retested for HBsAb by another three reagents which gave altogether 24 positive results,which was not related to each other.Those gave higher HBsAb value by E170 showed higher positive rate by Abbott reagent.CONCLUSIONS HBsAg and HBsAb both positive results are not rare.It may be due to the interactions between the patient and the infected hepatitis B virus.Besides,the quality of reagents and correct lab operating procedures may also affect the test results.