The self-renewal and multi-lineage developmental potential are the unique properties of human embryonic stem(ES) cells. The growth factors that maintain human or mouse embryonic stem cells are different. Leuckemia inhibitory factor(LIF) does not maintain self-renewal of human ES cells(hESCs). Recently, a few growth factors have been found to be biologically relevant for hESCs functions in vitro, among them the basic fibroblast growth factor(bFGF) is one of the most significant regulators of hESCs self-renewal. The purpose of this review is to introduce the recent progress in the research on the expressions of bFGF and its receptors and their functions in hESCs.

Objective To explore the distribution and accumulation regularity of catalpol in leaves during the growth of Rehmannia glutinosa var. huechingensis. Methods HPLC method was used to determine the catalpol content in fresh medicinal materials with acetonitrile-water (0.6:99.4) as the mobile phase and 210 nm as detection wavelength. Regression equation was Y = 377.26X - 1. 054 3. The water contents of the leaves at different developmental stages were also determined, so that the catalpol content could be achieved on dry matter basis.Results Both leaves and root tubers contained catalpol. The content of catalpol in leaves rised up to peak rapidly in August or September and then degraded gradually until leaves wither and fall. The content of catalpol in root tubers increased with the growth of root tubers and reached peak until harvest. Conclusions The variation of catalpol is caused by the physiological regulation of plants. The leaves contain a considerable amount of catalpol. Further study is needed to benefit the comprehensive utilization of Rehmannia glutinosa Libosch.

Objective To observe the clinical efficacy of auricular point sticking plus basic nursing for constipation of excessive syndrome in acute stage of stroke.Method Ninety patients with constipation of excessive syndrome in acute stage of stroke were randomized into a treatment group and a control group, 45 cases in each group. The treatment group was intervened by auricular point sticking plus basic nursing, while the control group was by basic nursing alone. The major symptom scores were observed before intervention and after 2-treatment courses, and the clinical efficacies were compared between the two groups.Result Respectively after 1 and 2 treatment courses, there were significant differences in comparing the major symptom scores between the two groups (P<0.05). The total effective rates were respectively 60.0% and 67.5% in the treatment group respectively after 1 and 2 treatment courses, versus 37.5% and 45.0% in the control group, and the differences were statistically significant (P<0.05). Conclusion Auricular point sticking is an effective approach in treating constipation of excessive syndrome in acute stage of stroke.

Objective: 139 documents (10,646 cases of angina pectoris in patients with coronary heart disease) which were treated with traditional Chinese medicine (TCM) of angina pectoris were researched, the application and existing problems of TCM evaluation standards of the efficacy of angina pectoris were studied to determine constructive items (candidate indicatrix) of TCM evaluation standards. Methods: The efficacy evaluation database of angina pectoris was established by the literature search and the software Epidata2.0, recorded in the database, and statistical analysed. Results: There are many kinds of evaluation standards of TCM efficacy of angina pectoris, but the utilization rate of each standard is lower than 40%. The main constructive item in evaluation standards of angina pectoris should include: the effect of the disease, syndrome effects, physical and chemical indicatrix, important clinical event, quality of life, and so on. Conclusion: The current evaluation standards of TCM efficacy of angina pectoris can not meet the clinical needs. A received evaluation standard should be established. The evaluation of TCM efficacy of angina pectoris should adopt integrated multi-dimensional index system.

Objective To study characters of TCM syndrome and pathological changes of coronary artery in patients of coronary artery disease combined with diabetes(CAD-DIA).Method By epidemiological way,patients with CAD-DIA were collected and compared with CAD without DIA,including clinical characters,characters of pathological changes of coronary artery,characters of syndrome.Result Compared with CAD without DIA group,history of hypertension and blood vessel rebuilt in CAD-DIA group had significant difference(P

To screen anti idiotypic single chain variable fragments(anti Id scFv)against hepatitis C virus NS4A(HCV NS4A)so as to lay a foundation for developing anti Id scFv vaccine againist the hepatitis C virus. The recombinant phage antibody library was panned by hepatitis C virus NS4A monoclonal antibody which was coated in a microwell plate. After five rounds of biopanning, 82 clones specific to HCV NS4A antibody were determined with the enzyme linked immunoadsorbent assay(ELISA). The specificity of anti idiotypic scFv was identified by ELISA and competitive inhibition assay. The DNA sequence of the positive clone was determined. The result showed that HCV NS4A anti Id scFv had a specific combination character with hepatitis C virus NS4A monoclonal antibody. The DNA sequence data showed that the anti Id scFv coding gene included 789 bp. The results suggested that the anti Id scFv fragments to HCV NS4A monoclonal antibody could be successfully selected by recombinant phage antibody library screening technique, which might pave a way for the study of new preventive and therapeutic strategy of hepatitis C using anti Id scFv.

To screen HCV core mimotopes,HCV core monoclonal antibody was used as immobilized molecule,and a 12 mer phage peptide library was biopanned and positive clones were selected by enzyme linked immunoadsorbent assay(ELISA), competitive inhibition assay, and DNA sequencing. 10 positive clones were chosen for DNA sequencing. From the experiment and sequencing comparison results,one epitope was confirmed as a mimotope of HCV core protein. The study might provide a new approach for HCV therapy and vaccine development.

Objective To screen HCV NS3 mimotopes by using monoclonal antibody and phage peptide library. Methods Using HCV NS3 monoclonal antibody as selective molecule, a 7 mer phage peptide library was biopanned and positive clones were selected by ELISA, competition assay and DNA sequencing. Results 13 positive clones were chosen for DNA sequencing. From the experiment and sequen-cing comparsion results, one epitope was confirmed as the mimotope of HCV NS3. Conclusions HCV mimotope is obtained by phage peptide library screening.

As an important segment in the talents' cultivation of medical English major,practical education assumes a positive role in promoting the students' unity of knowing and doing,upgrading their professional kills and improving comprehensive qualities.Taking English major (medical English direction) of Chongqing medical university as an example,the present study attempts to discuss the forms and contents of the practical education,along with the fruitful achievements,in view of students'interests,community service,horizon expanding as well as job hunting and further study pursuing.In addition,some reflections and measures are presented to further boost the practical education.