The current condition of medical students information literacy is briefly described.And the way and methods of information literacy culture of medical students are brought forward.

Double main teaching model can be applied in the teaching of pharmacology. To be spe-cific,for complex and difficult theory,we applied 'transmission-acceptancee' teaching method while for simple and easy theory,we used 'discovery' teaching method. Compared with the traditional teaching mod-el, double main teaching model improved teaching results and enhanced students' enthusiasm for learn-ing,their autonomous learning ability and cooperative ability. On the other hand,there still existed some prob-lems. We should keep on making great efforts to achieve better teaching results.

This research is to investigate and analyze the reading characteristics of students in medical college of Foshan Science and Tecnoology University during their clinical practice period,to understand the trainee's reading motive,their expectation of a reading teacher,and their demanding of serve from the college library,thus exploring the method and the countermeasures of the reading guides

Objective: To observe the expression of RAR-β gene in SiHa, HeLa, C33A and CasKi cell lines of cervical carcinoma and to investigate the role of methylated RAR-β in its expressive defection. Methods: Reverse transcription polymerase chain reaction (RT-PCR) was used to analyze the mRNA expression of RAR-β gene. Immunohistochemistry and Western Blot were used to analyze the protein expression of RAR-β gene in four cervical cancer cell lines as well as the influence of 5-Aza-cdR on gene expressive defection. Methylation specific PCR (MSP) was used to detect whether there was the methylation in RAR-β gene in four cell lines. The change of RAR-β gene methylation state was also observed by MSP. The cell proliferation rate influenced by the 5-Aza-cdR was observed by MTT assay. Results: The expression of RAR-β mRNA and protein in SiHa, HeLa and CasKi cell lines of cervical cancer was silent or decreased, whereas its expression was detected in C33A cell line. By using MSP method, it was found that there was RAR-β gene methylation in those three cell lines, whereas there was no RAR-β gene methylation in C33A cell line. After treated with the 5-Aza-cdR, methylated RAR-β gene was partly demethylated, and RAR-β mRNA and protein were re-expressed in the previous three cell lines in which RAR-β gene expression was silent or decreased. The 5-Aza-cdR treatment could supress cell proliferation as well. Conclusion: The RAR-β gene expressive defection plays an important role in the carcinogenesis of cervical cancer. The abnormal RAR-β gene methylation in the the promoter region has an important role in gene expressive defection. The cell proliferation can be supressed by demethylated treatment.

Objective: To observe the expression of RAR-β gene in SiHa, HeLa, C33A and CasKi cell lines of cervical carcinoma and to investigate the role of methylated RAR-β in its expressive defection. Methods: Reverse transcription polymerase chain reaction (RT-PCR) was used to analyze the mRNA expression of RAR-β gene. Immunohistochemistry and Western Blot were used to analyze the protein expression of RAR-β gene in four cervical cancer cell lines as well as the influence of 5-Aza-cdR on gene expressive defection. Methylation specific PCR (MSP) was used to detect whether there was the methylation in RAR-β gene in four cell lines. The change of RAR-β gene methylation state was also observed by MSP. The cell proliferation rate influenced by the 5-Aza-cdR was observed by MTT assay. Results: The expression of RAR-β mRNA and protein in SiHa, HeLa and CasKi cell lines of cervical cancer was silent or decreased, whereas its expression was detected in C33A cell line. By using MSP method, it was found that there was RAR-β gene methylation in those three cell lines, whereas there was no RAR-β gene methylation in C33A cell line. After treated with the 5-Aza-cdR, methylated RAR-β gene was partly demethylated, and RAR-β mRNA and protein were re-expressed in the previous three cell lines in which RAR-β gene expression was silent or decreased. The 5-Aza-cdR treatment could supress cell proliferation as well. Conclusion: The RAR-β gene expressive defection plays an important role in the carcinogenesis of cervical cancer. The abnormal RAR-β gene methylation in the the promoter region has an important role in gene expressive defection. The cell proliferation can be supressed by demethylated treatment.

Objective To investigate the effects of taurine on the expression of stem cell factor mRNA of the focal cerebral ischemia in rat.Methods 63 adult male rats were randomly divided into taurine-treated group (Taurine, 80 mg/kg, began at the day of MCAO and continuously intravenous injection for 10 min, daily for 7 days) and controlled group (0.9% normal saline, 1 ml, continuously intravenous injection for 10 min daily for 7 days). The rats received right middle cerebral artery occlusion at 2h and different hours of reperfusion. Expression of SCF was detected by in situ hybridization in the rats subjected to2h,24h,3d,7d, 14 d of reperfusion and sham-operated group (n=3). Results Low level SCF mRNA expressions were found in cortex, striatum and extraventricular zone in sham-operated group. The expression of SCF mRNA in ischemic hemisphere of controlled group increased markedly compared with sham-operated group (t=2.16~25.19, P＜ 0.05), besides that of 2 h in cortex, 2 h in striatum, 2h and 14d in extraventricular zone. SCF mRNA expression in the treatment group increased markedly in cortex,striatum and extraventricular zone at 3d and 7d(t=5.19~ 26.17,P＜0.05). Conclusion Taurine increased the SCF mRNA expression in MCAO rats, therefore it might promote the creation of neural stem cell.

OBJECTIVE To investigate the effect of microRNA-129(miR-129)expression on malignant phenotypes of esophageal squamous cell cancer(ESCC) cells and its possible molecular mechanisms. METHODS The constructed miR-129-overexpressed vector (pGCMV/EGFP/miR-129) and negative control vector (pGCMV/EGFP/miR-NC) were stably transfected into ESCC cell lines (Eca109 and EC9706),respectively. Quantitative real-time PCR(qRT-PCR)was performed to detect the expression of miR-129. MTT and flow cytometry(FCM)assays were performed to analyze the effects of miR-129 on proliferation, cell cycle and apoptosis of ESCC cells. Furthermore,a luciferase reporter vector with the putative B-cell lymphoma-2(Bcl-2)3′-untranslated region(pLUC/Bcl-2-3′-UTR-wt and pLUC/Bcl-2-3′-UTR-mut)was constructed to explore whether Bcl-2 was a direct target gene of miR-129 by detecting luciferase activity. Next,Western blotting was performed to detect the expression of Bcl-2, cleaved caspase 3 and total caspase 3 proteins. RESULTS Overexpression of miR-129 significantly inhibited proliferation(P<0.01),induced cell arrest in G0/G1 phase(P<0.05)and enhanced apoptosis (P<0.05)in ESCC cells. Luciferase reporter assay indicated that Bcl-2 was identified as a direct target gene of miR-129. Results of Western blotting showed that overexpression of miR-129 significantly reduced the expression of Bcl-2 protein and increased the expression of cleaved caspase 3 protein,but induced no changes in total caspase 3 protein in ESCC cells. CONCLUSION miR-129 functions as a tumor suppressor in ESCC cells by targeting Bcl-2 gene. Therefore,miR-129 will be a potential molecular target for the treatment of human ESCC.

Hedgehog (HH) signaling pathway was firstly discovered in the regulation of embryonic segments development in Drosophila; later, the biochemical and functional homologs of Drosophila HH signaling genes were also isolated in vertebrates (including human). Researchers found that HH signaling not only controls the embryonic development, but also plays an important role in tumorigenesis. Gli, a zinc finger transcription factor in the vertebral HH signaling pathway, combines to the special sequences of distal HH targeted genes and directly controls the transcription of targeted genes, playing a key role in HH signaling pathway. In this article, we summarize the role of Gli in HH signaling pathway and its prospect in cancer therapy.

AIM: To investigate the RNAi effect of the inhibitory member of the ASPP family (iASPP) on the apoptosis of human breast cancer cell MCF-7 which expressed the wild type p53 gene. METHODS: The recombinant plasmid pAd-iASPP-RNAi was transfected into MCF-7 cells. The expression of iASPP mRNA and protein was analyzed by RT-PCR and Western blotting, respectively. The cell apoptosis was detected by FCM, and then the MCF-7 cells were transplanted into nude mice to set up transplantation model. The expression of iASPP RNA and protein in transplanted neoplasm were determined by RT-PCR and Western blotting, the apoptosis index was detected by FCM at the same time. RESULTS: The results showed that the expression of iASPP descended in MCF-7 cells (mRNA 95.4% and protein 96.8%, respectively, P<0.01) and the apoptosis rate and necrosis rate of MCF-7 cells increased (P<0.01) after transfection. As treated with pAd-iASPP-RNAi, the expression of iASPP in transplantation tumor cells descended 87.4% (mRNA) and 89.2% (protein), respectively (P<0.01), and the apoptosis rate and necrosis rate increased accordingly (P<0.01, P<0.05). CONCLUSION: The inhibition of iASPP may resume the ability of p53 to induce apoptosis in breast cancer cells which is able to express wild type p53.