Janus kinase 2,myeloproliferative leukemia virus and tet encogene family member2 mutations affect a variety of cytokines signal transduction pathway in BCR/ABL-negative myeloproliferative neoplasms (MPN). In the influence of mutation load,co-mutation and genetic susceptibility,these mutations can induce different MPN phenotypes,and affect the characteristics of patients,the distribution of peripheral blood cells and prognosis. But how these mutations contribute to disease initiation,development,and transformation needs further reseach.

A high productive poly ?-glutamic acid(?-PGA) strain PGA-N in a culture medium containing no L-glutamine was isolated from fermentation products.With the following identifications of colony mor-phology,physiological and biochemistry experiments,and genetics,the strain PGA-N was classified as a Bacillus licheniformis.According to the product environment,the base culture medium having no L-glutamine was simulated.In order to enhance the production of the strain PGA-N,the fermentation condi-tions,such as carbon source,nitrogen source,were optimized and the ?-glutamic acid production reached 5.16 g/L after getting the optimum formulation of this culture medium.PGA-N was mutagenized with com-bination of NTG and UV.A mutant PGA-N-C10 was screened which PGA production was increased from 5.16 g/L to 8.82 g/L.The study also investigated the effects of agitation speed on the cell biomass,?-PGA production and the ?-PGA molecular weight.The ?-PGA yield of PGA-N-C10 was as high as 11.00 g/L when the agitation speed was 400 r/min.

A poly-?-glutamic acid producing strain--BLN-2, was isolated from the soybean products. According to the biochemical characteristics and 16S rRNA, the strain was identified as Bacillus subtilis. Using soybeans as culture, the solid-state fermentation conditions of BLN-2 have been studied. The results showed that the optimal carbon and nitrogen sources of BLN-2 were glucose, fructose, NaNO3 and KNO3, respectively. The orthrogonal experiments showed, when the final concentration of the fructose which was added to the soybean culture was 0.5%, the glucose, NaNO3 and KNO3 final concentraion were 2.0%, the production of ?-PGA was the highest--89.05 g/kg. It is 48.42% higher than other comparable soybean medium under the same conditions.

Objective: To introduce how to build a data platform of data collection and data management for multi-center birth cohort study by using REDCap. Methods: After the REDCap electronic data capture system was installed and set up, the electronic case report forms (eCRFs) were programmed to collect data in multi-centers. The rules of data quality control were programmed, and different levels of user right for access to data platform were assigned to the data managers and data clerks based on their role in research project. Results: With REDCap system being installed, the example project was created, and a series of eCRFs were established for each stage of preconception, pregnancy and childhood through follow-up. After intensive testing to improve and achieve a stable data platform, standardized trainings were provided to data-related team. The REDCap eCRFs were then put in use online. By assigning different user right of access to data platform, data entry can be from multi- research centers and survey sites. This REDCap data platform supported the cohort project on data collection and data management. Conclusion: The data platform established by using REDCap provides strong support to birth cohorts on data collection and data management. This example project of data platform can be applied to other epidemiological studies.

A fusion gene CTB-PROIN, in which Proinsulin gene was fused to the 3' end of CTB gene by a hinge peptide 'GPGP', was constructed and cloned into pET-30a(+) to obtain a prokaryotic expression vector pETCPI. Subsequently the recombinant plasmid pETCPI was transformed into E. coli stain BL21 (DE3). After induced by IPTG, the expression product was analyzed by sodium dodecyl sulphate-polyacrylamide gel (15%) electrophoresis (SDS-PAGE), and its result indicated that the recombinant protein CTB-PROIN was expressed and accumulated as inclusion bodies. The recombinant CTB-PROIN protein accumulated to the level of 25% of total bacterial proteins. After inclusion bodies was denaturalized and refolded in vitro, significant assembly of monomers had occurred, and the recombinant protein represented assembled pentamers. The results of western blotting analysis also demonstrated that the fusion protein could be recognized by the anti-CT and anti-insulin antibody, respectively. In addition, the result of the CTB-PROIN-GM1 binding assay, that the protein could bind to monosialoganglioside specifically, showed it possesed biological activity in vitro. These results provided the possibility of developing a cheaper and more efficient oral vaccine for type I diabetes using such constructs.
Artificial Gene Fusion ; Cholera Toxin ; genetics ; Cloning, Molecular ; Escherichia coli ; genetics ; metabolism ; G(M1) Ganglioside ; metabolism ; Proinsulin ; genetics ; Recombinant Proteins ; biosynthesis ; genetics

Infra-slow oscillation (ISO) is a kind of brain rhythm between 0.01 and 0.5 Hz. ISO is widely distributed in multiple brain regions. As an important psychophysiological activity, the ISO interacts with high-frequency neural rhythm via cross-frequency coupling, but has different activity patterns from high-frequency neural activity. Physiologically, the ISO may be generated by the dynamic activity of thalamus, glia, and ions. Psychologically, the frequency, amplitude, and phase of ISO could all regulate cognitive activities, but in different ways. Investigations on the ISO expands the neural rhythm research to lower frequency range, further promoting the construction of rhythmic theory of brain function.
Brain ; Thalamus