Objective To investigate the effect of liquid temperature, pressure, concentration, pH parameters on the membrane process and rejection in the process of using reverse osmosis membrane to concentrate oil-bearing water bodies ultrafiltrate of Compound Chuanxiong Capsules, and optimize the process. Methods With oil-bearing water bodies ultrafiltrate of Compound Chuanxiong Capsules volatile oil as the research object, the changes in flux under different operating parameters was measured. Results For this system, suitable operation parameters was as follows: pressure was 1.6 MPa, temperature was 35～ 40 ℃, pH was 9～10. Conclusion Using reverse osmosis membrane to concentrate oil-bearing water bodies ultrafiltrate of Compound Chuanxiong Capsules volatile oil, better flux and rejection can be obtained at the appropriate operating conditions.

BACKGROUND: Previous studies have found that skeletal muscle satellite cell transplantation can induce angiogenesisin myocardial infarction area, reduce infarct size and improve cardiac function. But the overall effect is not satisfactory.OBJECTIVE: To observe the survival of basic fibroblast growth factor (bFGF) gene modified skeletal muscle satellitecells in acute myocardial infarction and to observe the expression of bFGF gene and the effect of cell transplantation onangiogenesis in myocardial infarction area.METHODS: Eighteen New Zealand white rabbits were divided into three groups by random: skeletal muscle satellite cellgroup (control group), bFGF gene enhanced skeletal muscle satellite cell group (experimental group) and blank controlgroup. The left anterior descending branch of the coronary artery of the rabbits was ligated so as to establish an animalmodel of acute myocardial infarction in the former two groups. After labeled by DAPI before transplantation, the skeletalmuscle satellite cells, bFGF gene modified skeletal muscle satellite cells and the equivalent amount of DMEM/F12 wereinjected into the local infarct myocardium correspondingly. Samples were taken 4 weeks after transplantation. Then, thesurvival of skeletal muscle satellite cells and the expression of bFGF gene were observed under light microscope andfluorescence microscope, and the neovascularization in the myocardial infarction area was examined byimmunohistochemical staining.RESULTS AND CONCLUSION: No DAPI-labeled cells were visible in the blank control group, but in the other twogroups, a large amount of DAPI-labeled skeletal muscle satellite cells were seen in the infarction area. Enhanced greenfluorescent protein was highly expressed in the experimental group. Microvessel density in the infarction area washighest in the experimental group followed by the control and blank control groups (P < 0.05). These findings indicatethat bFGF gene modified skeletal muscle satellite cells can survive and promote neovascularization in the acutemyocardial infarction area.

BACKGROUND:Skeletal muscle satel ite cells are totipotential stem cells with multi-directional differentiation potential, locate in skeletal muscle interstitium, have a certain tolerance to ischemia and hypoxia, and are important cells in stem cellengineering.
OBJECTIVE:To establish a thrifty, convenient culture procedure and create a simple, efficient method to transfect skeletal muscle satel ite cells, and investigate genetic expression after the transfection for cellular cardiomyoplasty.
METHODS:Skeletal muscle satel ite cells were isolated from rabbit thigh and cultured. Their growth curves were determined by CKK-8 method. Grouped by different proportions of the plasmid and liposome, skeletal muscle satel ite cells were transfered by the enhanced green fluorescent protein plasmid based on liposome. After transfection, the efficiency and character of target genetic expression was determined.
RESULTS AND CONCLUSION:Satel ite cells were isolated, cultured and transfected successful y. In suitable ratio of plasmid and liposomes, the transfection efficiency reached up to above 35%. The target protein was expressed within 12 hours after transfection, reached maximum in 48-72 hours and decreased gradual y after one week. The expression stil could be observed two weeks latter. The enhanced green fluorescent protein plasmid conducted by cationic liposome could be transfered into skeletal muscle satel ite cells efficiently. The transfection efficiency was correlated closely to the ratio of plasmid and lipofectamine. The change of target gene expression depended on time.

Objective To discuss the clinical efficacy of closed reduction and plaster splint fixation ( CRPSF) in the treatment of gerontal patients with distal radius fractures ( DRF) .Methods 76 elderly patients with DRF who treated by CRPSF were selected .According to AO classification of fractures ,the patients were divided into three groups,the A group had 27 cases;B group had 26 cases,C group had 23 cases.The treatment effect was evalua-ted by analyzing the follow-up data,the corresponding imaging measurement parameters and clinical scores .Results All patients had 12-month clinical and imaging follow-up.In the last follow-up, the arm-shoulder-hand dysfunction score and palmar angle ,ulnar deviation angle of A and B group were significantly better than those of C group , the differences were statistically significant(all P<0.05),the difference between A and B group was not statistically sig-nificant (P>0.05).In the last follow-up,the satisfaction score of C group was slightly lower than that of the A or B group,but had no statistically significant difference (P>0.05).Conclusion CRPSF in the treatment of gerontal pa-tients with DRF has good function and imaging effects ,and the improvement level has a certain relationship with the degree of fracture,but has no significant impact on the patients'satisfaction.

Objective To evaluate the accuracy of lymphocyte count as a surrogate for CD4+T cell count in treatment-na(i)ve HIV-infected adults.Methods A total of 2 013 HIV-infected patients were screened at 23 sites in China.CD4+ T cell counts were measured by flow cytometry.Correlation between CD4+ T cell count and peripheral lymphocyte count were analyzed by spearman coefficient.AUCRoc were used to evaluate the performance of lymphocyte count as a surrogate for CD4+ T cell count.Results The lymphocyte count and CD4+T cell count of these 2 013 patients were (1 600±670) × 106/L and (244 ± 148) × 106/L respectively.CDa+ T cell count were positively correlated with lymphocyte count(r =0.482,P ＜0.000 1).AUCROC of lymphocyte count as a surrogate for CD4+ T cell counts of ＜ 100 × 106/L,＜200 × 106/L and ＜ 350 × 106/L were 0.790 (95％ CI 0.761-0.818,P ＜ 0.000 1),0.733 (95％ CI 0.710-0.755,P ＜ 0.000 1) and 0.732 (95％ CI 0.706-0.758,P ＜ 0.000 1) respectively.Conclusion Lymphocyte count could be considerad as a potential surrogate marker for CD4+ T cell count in HIV/AIDS patients not having access to T cell subset test by flowcytometry.

Objective To investigate the prevalence of primary HIV-1 genotype drug-resistance and viral subtype from 237 treatment-naive patients in China.nethods CD4+ T cell counts,plasma HIV-1 viral load and HIV-1 gene sequencing in total 237 treatment-naive patients enrolled from 20 provinces/regions were detected for the evaluation of primary HIV genotypic drug-resistance.Results The survey of 237 treatment-naive patients from muhicenter areas including Henan Province,Yunan Province,and Shanghai showed that 9 subtypes of HIV-1 strains were finally identified.Most of patients were infected before 2003.Only 3 cases had genotypic mutations associated resistance to antiretroviral drugs,with high resistance to nucleoside reverse transcriptase inhibitors(NRTIs),moderate resistance to protease inhibitors(PIs)and high resistance to non-nucleoside reverse transcriptase inhibitors(NNRTIs).respectively.The prevalence of primary genotypic drug resistance was 1.3%(3/237)in this study.Conclusions The rate of HIV-1 primary genotypic drug-resistance is still relatively low in treatment-naive HIV/AIDS patients while 9 subtypes of HIV-1 strain was diseovered.

Objective To analyze the correlation between CD4+ T cell count and HLA-DR or CD38 expression on peripheral CD8+ T cells in treatment-naive Chinese HIV/AIDS patients.Methods A total of 471 treatment-naive HIV-infected patients and 53 healthy volunteers were enrolled.HLA-DR or CD38 expression on peripheral CD8+ T cells, CD4+ T cell count, naive CD4+ T cell subsets and CD28 expression on T cells were measured by flow cytometry.Plasma HIV RNA load was quantified by real-time PCR (COBAS TaqMan RT-PCR).Mann-Whitney U test and Spearman's rank correlation test were used for statistical analysis.Results CD38 expression intensity on CD8+ T cells was negatively correlated with CD4+ T cell count (r =-0.53, P ＜ 0.001) and naive CD4+ T cell count (r =-0.48, P ＜ 0.001).CD38 expression on CD8+ T cells also displayed significantly negative correlation with CD28 expression on CD8+ T cells (r =-0.46, P ＜ 0.001).HLA-DR expression on CD8+ T cells did not show significant correlation with CD4+ T cell count.Only weak positive correlation was found between CD38 intensity on CD8+ T cells and plasma HIV RNA load.Conclusions Compared with HLA-DR, CD38 expression on CD8+ T cells shows more significant negative correlation with CD4+ T cell count in treatment-naive patients.CD38 and HLA-DR may play different roles on the persistent immune activation in HIV infection.

Objective To analyze the species classification and chracteristics of drug resistance and virulence in CTX-M producing Escherichia coli isolated from urine culture.Methods Escherichia coli cultured by urine were collected from our hospital during 2014,the ring disk diffusion test was implemented to determine the bacterial susceptibility,the EBLs determination test was used to analyze the bacterial EBLs producing situation;the enterobactoer duplicated gene spacer consensus sequency PCR(ERIC-PCR) was adopted to perform the genetic relation analysis;PCR was used to amplify the CTX-M encoding genes and multiple virulence genes iutA,ompT,fyuA,fdeC,fimH,traT,cvaC,pap,kpsMT,pAI,usp,aer,hlyA,cnf and chuA;the multiple PCR was used to analyze the species calssification of CTX-M-producing Escherichia coli;these strains of bacteria were classified as the CTX-M-producing group and non-CTX-M-producing group according to the results of CTX-M coding gene detection,the differences in the antibacterial drug resistance and virulence genes between the two gorups were performed the contrastive analysis.Results One hundred and sixty-two strains of E.coli by urine culture had no genetic correlation,among 126 EBLs positive strains,91 strains produced CT-M,in which 57 strains of CT-M producing Escherichia coli belonged to type D,and 116 strains belong to Type B2.The statistical analysis found that the drug resistance rate in the CTX-M-producing group was significantly higher than that in the non-CT-M producing group (except for imipenem),the prevalence of virulence genes including iutA,chuA and traT in the CT-M producing bacteria group was significantly higher than that in the non-CTX-M-producing group(P=0.001,0.006,0.000)Conclusion CTX-M-producing E.coli is main pathogenic bacterium of urinary infection in our hospital,its majority belong to type D with increased drug resistance,moreover has close correlation with virulence genes iutA,chuA and traA and is a pertential threat in clinical treatment of urinary infection.

Objective To investigate the short-term acute rejection incidence of the recipients under the steroid-free immunosuppressive therapy after liver transplantation. Methods This retrospective study included 186 patients who were divided into two groups by random number table.The patients in no steroid group (the study group, n =94) received tacrolimus (Tac) with mycophemolate mofetil (MMF) or cyclosporine with MMF,and those in the steroid group (the control group,n =92) received the aforementioned immunosuppressive therapy combined with steroids.The acute rejection incidence was analyzed during six months post-transplantation.Results There was no significant difference in the gender,age,indication for transplantation,Child-Pugh score,MELD score,operating time,bleeding and transfusion volume during the operation,warm ischemia time and cold ischemia time between the two groups (P＞0.05).Liver biopsy was done on 9 cases of each group.The acute rejection incidence had no significant difference between the study group and the control group (5/94 vs 4/92,5.3％ vs 4.4％,P＞0.05).Conclusion The steroid-free immunosuppressive therapy after liver transplantation did not increase the short term acute rejection incidence.

Objective To evaluate the influence of long-term nucleotide reverse transcriptase inhibitors (NRTIs) on lipids metabolism in HIV/AIDS patients and correlating clinical factors.Methods A total of 118 HIV/AIDS patients were divided into 3 groups:untreated group (40 patients),highly active antiretroviral therapy(HAART) for 1-2 years group (37 patients) and HAART over 5 years group (41 patients),with 20 healthy individuals as the control group.Clinical lipodystrophy (LD) was defined as concordance between patient's report of change and physical examination.Fat mass (FM) was measured by dual-energy X-ray absorptiometry (DXA).Results There was no significant difference in the incidence of LD between HAART for 1-2 years group and HAART over 5 years group (51.2％ vs 40.5％,P =0.345).The prevalence of LD was 2.4 folds with strvudine (d4T) treatment compared with zidovudine (AZT)-containing regimens (61.6％ vs 23.5％,P =0.001).Based on DXA measurements,FM of total body and limbs were significantly lower in the HAART over 5 years group than that in the control group,the untreated group and the HAART for 1-2 years group (P ＜ 0.05).Trunk FM was significantly lower in the HAART over 5 years group than the untreated group and the HAART for 1-2 years group (P ＜ 0.05).FM of total body and trunk were significantly lower in patients without LD in the HAART over 5 years group than patients without LD in the HAART for 1-2 years group (P ＜ 0.05).FM was correlated positively with body weight and BMI.Limbs FM was correlated negatively with peripheral blood triglyceride concentration.Conclusions HIV/AIDS patients with NRTIs therapy have high prevalence of LD,which mainly occurs 1-2 years after therapy,and increases with d4T treatment compared with AZT-containing regimens.There was no significant difference in the incidence of LD between the HAART for 1-2 years group and the HAART over 5 years group.FM was significantly decreased after long-term HAART in the patients with or without LD.DXA can evaluate LD objectively and guide further clinical treatment.