OBJECTIVE:To study the cooperative effect of arsenic trioxide(As 2 O 3 )and octreotide on the proliferation of human hepatocellular carcinoma(HCC)SMMC-7721and to observe the combining effect of the two drugs.METHODS:The killing effect of drugs was determined by MTT;the cell cycle was determined by flow cytometry(FCM);the drug combination analysis was conducted by the moderate efficiency principle.RESULTS:The combination of arsenic trioxide and octreotide significantly inhibited cell proliferation of SMMC-7721in vitro;and the moderate efficiency concentration of As 2 O 3 and oc-treotide in combination was2.022?mol/L and8.088?mol/L respectively,which were lower than those when used singly.The combination of two drugs can inhibit HCC at the S-phase.The combination index was less than1if the combining domino offect of As 2 O 3 and octreotide was more than0.3.CONCLUSION:Combination of As 2 O 3 and octreotide in vitro can signifi-cantly increase the inhibition effect of each single one on the proliferation of SMMC-7721and the combination of two has a better anticarcinogenic effect when the domino offect of the combination is above0.3.

In most universities the usage of digital information resources are not ideal.One reason is that primary audience groups of libraries——college students rarely use these resources.So we propose some measures and proposals for university libraries to provide the service of digital information resources for university students.

Objective To investigate effects of blood serum concentration of MHD in children with epilepsy of different ages. Methods Two hundred children with epile psy were divided into four groups according to age,group A:<3 years old in-fants;group B:3~6 years old preschoolers;group C:7~13 years old school-age chidren.Group D:14~18 years old adoles-cents,each group had 50 chidren.The serum concentration of active metabolite was detected by high-perform ance liquid chromatography (HPLC)method.Results The serum concentration of MHD increase with age,but there were no statistical significance (P>0.05).Conclusion The indiv idual variation in blood serum concentrations of MHD in children with epi-lepsy adminisered with oxcarbazepine is high,therefore monitoring the blood serum concentration is helpful to adj ust the dose of medication and to promote the implementation of the individualized dosing regimens.

Objective To demonstrate the value of eombined application of prenatal ultrasonography with fetal magnetic resonance imaging(MRI) in the diagnosis of monochorionic muhifetal realformations. Methods Fourteen cases of muhifetal malformations,detected by prenatal ultrasonography,received MRI within 48 h afterwards.All diagnosis were confirmed after delivery or mid-term termination.All imaging results of the 14 cases were retrospectively reviewed. Results Among the 14 cases,there were 7 acardias,5 Conjoined twins and 2 demise of multifetuses.Comparing ultrasound with MRI,we found that:(1)In cases with acardia and demise of multifetusea,ultrasound could diagnose correctly and be an important tool for follow-up,while MRI could demonstrate organs and structures of the acardiac recipient more clearly and detect the secondary changes of brain in the donor and survived fetus.(2)In Conjoined twins,ultrasound was superior to MRI in demonstrating the structure and function of cardiovascular system : and equivalent to MRI in identifying stomach,kidney,bladder and limbs;but inferior to MRI in identifying esophagus,lung,liver and intestinal,especially in the brain. And MRI could demonstrate two fetuses and the relationship between them in COnjoined twins simultaneously. Conclusions Prenatal ultrasonography and MRI have their own advantages and disadvantages in diagnosing monochorionic multifetal malformations.But the combination of prenatal ultrasonography and fetal MRI may be more valuable.

Objective To compare the influence of open access journals ( OAJ ) of biomedicine on academic exchanges by empirically analyzing the journals enrolled in the Chinese science citation database-the core (CSCD-C).Methods Multivariate statistical analysis was performed on OAJ and non OAJ in CSCD by using bibliometric and statistical methods,SPSS software and rank-sum test.Results The OAJ were accounted for only 31.63％ of the total enrolled journals,the average ratio of funded papers in OAJ was 72.29％.Statistical journals had high influence in the discipline.The selfcitation rates of clinical medicine OAJ and special medical OAJ were high.The average impact factor and h index in biological OAJ were high.The average impact factor of preventive medicine OAJ was high.The average h index of comprehensive non OAJ was high.Conclusions The distribution of OAJ is uneven among different disciplines.The ratio of funded papers is higher in OAJ than in non OAJ with insignificant differences in discipline influence.

Objective:To explore the influencing factors of working enthusiasm among public hospital medical staff in underdeveloped areas.Methods:With the method of stratified sampling,a questionnaire survey was conducted among 310 public hospital medical staff.The influencing factors of working enthusiasm were analyzed using the method of factor analysis and Ordinal Logistic model.Results:From the 14 incentives,we extracted three common factors including relationship development,living,and leisure.After the analysis of Ordinal Logistic model,it showed that the main influencing factors of the enthusiasm were the relationship development,leisure and hospital grade.Conclusion:It should put medical staff member leave system into effect to create a good atmosphere for relationships,and provide a reasonable space for promotion to enhance the enthusiasm of medical staff.

Objective To investigate the effect and monitoring point of continuous veno-venous hemofil-tration (CVVH) in patients with multiple organ dysfunction syndrome (MODS). Methods In 22 patients with MODS,a double lumen catheter was put into the central vein,and the CWH was performed with the BRAUN Diapact CRRT. The level of BUN,Scr,serum potassium and arterial blood gas were measured 30 minutes before and after CVVH. The plasma TNF-α、IL-1、IL-8 were measured by ELISA. Vital signs were monitored dur-hag treatment process. Results The vital signs of all patients` was stable, the levels of BUN,Scr and serum potassium decreased significantly after CVVH. The plasma concentrations of TNF-α,IL-1 and IL-8 gradually decreased. Conclusions CWH can improve the blood biochemical markers,remove inflammatory cytokines in plasma,stsblize the vital signs during treatment,which is suitable for patients with MODS.

Objective To investigate the expression of PPAR-γ in rectal carcinoma and the relationship between the expression of PPAR-γ and apoptosis in rectal carcinoma. Methods Tissue microarray and immunohistochemistry were used to detect the expression of PPAR-γ gene, bcl-2 and bax in 16 cases of the normal rectal tissue, 16 cases of rectal adenoma and 80 cases of the rectal carcinoma. TUNEL was used to detect of the AI in 80 cases of the rectal carcinoma. Results The positive rate of PPAR-γ expression in normal rectal tissue, rectal adenoma and adenocarcinoma were 6.3%, 25.0% and 71.3% respectively. Clinicopathological analysis showed that the in-crease of PPAR-γ expression were not associated with age, sex and histological classification (P > 0.05), but associated with differentiation grades, pathological stages, lymph nodes metastases and 3-year survival rate (P < 0.05). The expression of PPAR-γwas positively correla-ted with bcl - 2 and bax. AI was negative related with PPAR-γ (r = -0.51, P < 0.05). Conclusions PPAR-γ gene may play a role in the oncogenesis and progression of rectal carcinoma. The abnormal regulation of apoptosis may play an important role in the pathogenesis of rectal carcinoma. Detection of PPAR-γ is of great value for diagnosing colorectal carcinoma, and evaluating malignancy extent and prognosis.

Objective:To analyze the clinical characteristics of interstitial pulmonary fibrosis (IPF) in patients with Rheumatoid arthritis (RA). Methods: We retrospectively analyzed 198 RA patients with or without IPF. Characteristics of RA-IPF in clinical and lab data were analyzed. Age, duration of disease,clinical and laboratory parameters, history of smoking and medicine were compared between the patients with and without IPF. Results: (1) Among the 198 RA patients, 15.2% (30/198) were found with IPF. 100% RA-IPF patients had HRCT findings. However, 63.3% (19/30) had positive findings in chest X-ray, and only 46. 7% ( 14/30) had the complaints of cough and short breath. Velcro rales were found in 50.0% (15/30) patients with IPF and no acropachy occurred. Only one patient suffered from hypoxemia. IPF presented after the joint symptoms in most patients. (2 ) RA-IPF patients were older than those without IPF [(65.50±9.71) vs (55.22±12.98) years, P＜0.01]; Higher positivity of anti-keratin antibodies ( AKA) were found in RA-IPF compared to patients without IPF (61. 5% vs 35.9% , P =0.014). Furthermore, the levels of anti-cyclic citrullinated peptide (CCP) antibody were significantly higher in RA-IPF [(4.38±2.08) vs (3.20±2. 12) , P =0.01]. No differentiation of duration of disease, history of smoking and medicine, IgM rheumatoid factor, IgG rheumatoid factor, anti-nuclear antibody, anti-SSA antibody and levels of immunoglobins and complements were found between the two groups of RA patients with and without IPF. Conclusion: The clinical symptoms of IPF in RA patients are mild and more common in older patients. AKA and anti-CCP antibody might be important antibodies associated with RA-IPF.

Objective To investigate the effect of nifedipine on renal ischemia-reperfusion injury (I/R) in rats and the possible mechanism. Methods Forty-two male SD rats weighing 220-250 g were randomly divided into 3 groups with 14 animals in each group: sham operation group (group S); I/R group and I/R + nifedipine group (group N). The renal ischemia was induced by occlusion of bilateral renal arteries and veins for 45 min followed by reperfusion. In group S the renal arteries and veins were only exposed but not occluded. In group N, nifedipine 0.1 mg/kg was injected via the tail vein 15 min before ischemia and 15 min before reperfusion, while the equal volume of solvent was given in group I/R. The urine was collected to detect the N-acetyl-β-D-glucosaminide (NAG) activities at 6 and 24 h of reperfusion. Arterial blood samples were taken at 6 and 24 h reperfusion for determination of concentrations of serum creatinine (Cr), malondialdehyde (MDA) and NO. The rats were then sacrificed and the kidney was removed to detect the apoptotic cells in renal cortex and expression of heat shock protein 70 (HSP70) and endothelin- 1 (ET-1). Results The concentrations of serum Cr and MDA, NAG activity, expression of HSP70 and ET-1 and apoptosis rate were significantly increased in group I/R compared with group S (P ＜0.05). The concentrations of serum Cr and MDA, NAG activity, ET-1 expression and apoptosis rate were significantly decreased, while the serum NO concentration was significantly increased in group N compared with group I/R (P ＜ 0.05). Conclusion Nifedipine can attenuate renal I/R injury and the underlying mechanism may be related to the inhibition of ET-1 expression.