Objective Hepatitis B virus(HBV)-encoded X(HBx) contributes to the development of hepatocellular carcinoma(HCC).Peroxisome proliferator activated receptor(PPAR?) highly expressed in some hepatoma cell lines.We tend to investigate the possible relationship between HBx and PPAR? in the development of hepatic cancer.Methods PPAR? of HepG2 cells traysinfected with recombinant HBx adenovirus,with blank vector and without transfection was detected by RT-PCR for its mRNA level,Western blot for its protein level and immunocytochemistry for its localization.The effect of HBx on the inhibition of HepG2 cell growth by troglitazone,the ligand of PPAR?,was measured by MTT assay.Results The localization of PPAR? in HepG2 cells infected with HBx adenovirus was changed,increasing in cytoplasm and decreasing in cellular nucleus,while the expressions of PPAR? mRNA and protein were not significantly changed,compared with those in HepG2 cells or HepG2 cells transfected with blank vector.The inhibitory effects of troglitazone on HepG2 cell growth weakened when HepG2 cells were infected with HBx adenovirus.Conclusion HBx may affect the localization of PPAR?,but not the quantity of PPAR? expression.HBx decreases the inhibition ratio of troglitazone on HepG2 cell growth.

The important difference between post-graduate and undergraduate education is to train their reseach ability,which is very important especially to the post-graduate students of basic medicine who will be researchers.The problem in training research ability of post-graduate was studied in this paper and solution plan was put forward.

OBJECTIVE:To evaluate the feasibility of preparing tretinoin liposome by calcium acetate gradient method and to compare this method with the microfilm and the antiphase evaporation method.METHODS:Tretinoin liposome was pre-pared by microfilm method,antiphase evaporation method and calcium acetate gradient method,respectively.Sephadex G-50was used for isolation and ultraviolet spectrophotometry was utilized to determine the entrapped efficiency and grain size of liposomal tretinoin.Electronmicroscope was applied to observe the shape of tretinoin liposome.RESULTS:The calcium ac-etate gradient technology achieved the highest entrapped efficiency of90.48%.The liposomes had perfect shape with the mean diameter of35.8nm and kept stable in quality at4℃for3months.CONCLUSION:The liposome with high entrapped effi-ciency could be prepared by calcium acetate gradient method,and the method is feasible.

Objective: To determine glycyrrhizic acid content in Gankang Granules by HPLC.Methods: HPLC analysis was carried out with C 18 column and methanol acetic acid water (65∶5∶30) as the mobile phase. The detection wavelength was 250nm.Results: The linear range was 9.78～58.68 ?g( r=0.9999 n=6) . The average recovery was 98.40%, RSD was 0.88%. Conclusion: The method is simple, reliable and sensitive. It can be used in quality control of Gankang Granules.

50Gy) in solitary or limited BM subgroup seemed to survive longer. However in the Cox mu ltivariate analysis, only KPS, numbers of BM, extracranial systemic metastasis a nd chemotherapy were significant prognostic factors. Just as those of RPA subgro ups, the median survival from the start of WBRT was 3, 9, 16 months in 3 PI subg roups respectively.Conclusions:Overall survival in BM from breast cancer remains p oor. KPS, numbers of BM, extracranial systemic metastasis and chemotherapy were independent prognostic factors. RPA classification can predict the prognosis of patients with BM from breast cancer, so can the PI model.

Objective To explore the postoperative care to hemodialysis patients with hypocalcemia after parathyroidectomy with refractory secondary hyperparathyroidism. Methods The nursing measures included timely correction of hypocalcemia, nursing of muscular spasm, dietary nursing and rational medication. Five of them developed numbness in the limbs, which was alleviated by administration of venous transfusion of calcium gluconate. After six months, the blood calcium in 6 patients resumed to normal level. For 1 case with lower blood calcium, the level of blood calcium maintained at 1.8~2.0mmol/L after supplement with high dose of calcium and high -calcium hemodialysis. Conclusions The hemodialysis patients with refractory secondary hyperparathyroidism after parathyroiddectomy are susceptible to hypocalcemia. The timely correction of hypocalcemia and related nursing measures are of significance for their recovery.

ObjectiveTo evaluate the effectiveness of PBL teaching model for medical students in surgery bed side teaching.MethodsThe method of meta-analysis.ResultsFinally,twenty-six documents met the requirement.The resuhs of Meta-analysis showed that,in the aspect of theory improvement for medical students,WMD=6.46,95 ％ CI 为 2.56 ～ 10.36,P＜0.01 ; in the aspect of skill ability improvement,WMD=5.32,95 ％ CI 为 2.47 ～ 8.16,P ＜0.01.ConclusionThe model of PBL teaching could significantly improve the effectiveness in theoretical knowledge and skill ability.

Objective To investigate the meridian touching on neonatal hyperbilirubinemia effect of adjuvant therapy.Methods 120 cases of neonatal hyperbilirubinemia were randomly divided into the observation group and the control group,60 cases in the control group were treated with modified simple touch of domestic law,on the basis of modified simple touch,the observation group increased meridian touching,2 times per day,once every 15 min.The nursing effect was compared between two groups.Results The observation group was significantly better than the control group in items such as daily intake of milk,sleep time,meconium drained time,jaundice.Conclusions On the basis of modified simple touch of domestic law,the addition of meridian touching can effectively reduce neonatal hyperbilirubinemia serum bilirubin levels,prevent high bilirubin encephalopathy,and promote the growth and development of newborns.

Objective To choose one protocol that can quickly ,safely and effectively provide amount enough of bone marrow derived mesenchymal stem cells(MSCs) for use of clinical or experimental test through comparison of their growth characteristics and growth factors levels in culture solution .Methods Cells extracted from bone marrow of C57BL/C mice respectively underwent two different isolation protocols :whole bone marrow adherent culture(WBMAC) or gradient density separation(GDS);characteris‐tic surface antigens of MSCs were identified by flow cytometry on cells isolated in different ways ;the distinct growth curve of pri‐mary stem cells cultured in vitro described their different proliferation rate;levels of vascular endothelial growth factor(VEGF) and stromal cell‐derived factor‐1α(SDF‐1α) in culture medium were detected by ELISA .Results Primary MSCs obtained by WBMAC proliferated at higher speed and exhibited shorter growth cycle than those separated by GDS ;on MSCs from both groups ,surface antigens CD29 were detected positively ,and antigens including CD31 ,CD34 and CD45 were assayed negatively ;concentration of VEGF and SDF‐1αin both two nutrient solution primarily keep at low levels ,comparatively ,level of VEGF and SDF‐1αin the di‐shes which contain MSCs by WBMAC was higher than the one in the dishes which contain MSCs by GDS .Conclusion MSCs ex‐tracted by WBMAC shows unimpaired cell function ,can build automatically more suitable microenviroment for their growth;this classic method was qualified for clinical and experimental use in a safe ,rapid ,effective way .

The innovative experiment programs are important teaching reform for improving the students' innovating spirit and practical ability.The innovative experimental studies for medical students in preclinical stage include scientific research topic selection,information retrieval,experimental study and manuscript preparation.The innovative experiments stimulated the research interests,improved the comprehensive quality and promoted the learning of preclinical theories.However,the supporting rules,the assessment methods and the quality of teachers remain to be further improved in order to execute the programs more successfully.