Objective To determine the potential deficiency due to lack of anaerobic culture and evaluate the effect to reduce adverse reaction associated to transfusion-translated bacterial infection.Methods The result of 9 758 units of apheresis platelet concentrates (PCs)detected with automated microbial detection system were reviewed and the medical records of the patients that received the contaminated PCs were followed.Results The confirmed positive rates by aerobic and anaerobic cultures were 0.06％ (6/9 758)and 0.16％ (16/9 758),respectively.In 10 of 16 yield cases,only the anaerobic culture was positive.The most of the bacterial detected by anaerobic culture only were Propionibacterium acnes.Their mean detection time from inoculation was 96.8±18.21 hours.Conclusion Addition of anaerobic culture would enhance the detection of bacterial contamination in PCs.However,since only slow-growing bacteria were detected,and because their clinical significance was debatable,blood service should select feasible and costeffective projects using only aerobic bottle for bacterial screening,like the majority of licensed blood centers in North America and Hong Kong,China.

Objective To investigate the effect of blocking CD40/CD40L costimulatory pathway by the lentiviral vector-mediated RNA interference on the survival of mouse cardiac allograft. Methods Mouse bone marrow-derived dendritic cells (DCs) were infected by CD40-RNAi lentiviral vector in vitro, and tolerogenic DCs (Tol-DCs) with decreased CD40 expression were prepared. Fluorescence real-time quantitative PCR and flow cytometry were used to analyze the expression of CD40 mRNA and DC surface antigens CD40, CD11c, MHC Ⅱ before and after infection. Mouse model of heterotropic abdominal heart transplantation was established. Seven days prior to heart transplantation, Tol-DCs with decreased CD40 expression were transfused into recipient mice intravenously (lentivirus infected DC group). Control group and non-infected DC group were assigned simultaneously. The survival of cardiac allograft was monitored and pathological grade of acute rejection 7 days after heterotropic abdominal heart transplantation was determined. Results The transcription of CD40 mRNA of DCs was down-regulated significantly at 48 h after CD40-RNAi lentiviral vector infection, and the inhibition rate was 80. 9%. The expression of CD40 protein was also significantly decreased as compared with control group (40. 07% ± 4. 03% ) ( P ＜ 0. 05 ).Compared to control group (8 ± 2 days) and non-infected DC group (9 ± 1 days), the survival time of cardiac allograft in CD40-RNAi lentivirus infected DC group (14 ± 4 days) was significantly prolonged (P＜ 0. 05 ), and the pathological grade of acute rejection decreased significantly ( P ＜ 0. 05 ).Conclusion Blocking CD40/CD40L costimulatory pathway could hamper the activation of allogeneic T lymphocyte, inhibit the acute rejection and prolong the survival of mouse cardiac allograft.

Objective To construct the mouse CD40 RNA interfering(RNAi) lentiviral vector and prepare dendritic cells (DCs) with low expression of CD40. And to explore the mechanism of inducing T lymphocyte incompetence by blocking CD40/CD40L costimulatory pathway. Methods Mouse myeloid DCs were cultured in selective medium containing necessary cytokines for DC growth in vitro. CD40 RNAi gene was transfected into DCs with lentiviral vector. The expression levels of CD40 mRNA and protein were assayed by real-time quantitative PCR and flow cytometry respectively. The influences on DCs stimulating the proliferation ability of T lymphocyte were observed through mixed lymphocyte culture(MLC). Results Myeloid DCs have been harvested from mouse through cell culture in vitro. A mouse CD40 RNAi ientiviral vector was built successfully. The lentiviral titer was 8×10~9 TU/ml. The CD40 mRNA inhibition rate after infection was significantly higher(P<0.05). The CD40 protein expression of DCs was significandy lower(P<0.05). The result of MLC demonstrated that the index of stimulation to T lymphocyte of CD40 RNAi transfected DC significantly decreased compared with non-transfected DC and empty plasmid transfected DC(P< 0.01). Conclusion Large quantity of myeloid DCs with typical histological configuration are obtained through in vitro culture in selective medium which may activate naive T lymphocyte to generate immune response. While DCs were infected by CD40 RNAi lentiviral vector, CD40 protein expression was inhibited significantly. The DCs could hamper the activation of allogeneic T lymphocyte by blocking CD40/CD40L cestimulatory pathway and induce T cell allergy. This will make the good foundation for studying the immune tolerance of CD40 RNAi.

Anti-Bacterial Agents ; therapeutic use ; Echocardiography, Doppler ; Endocarditis, Bacterial ; complications ; diagnosis ; therapy ; Female ; Heart Atria ; diagnostic imaging ; pathology ; surgery ; Heart Diseases ; diagnosis ; therapy ; Heart Ventricles ; diagnostic imaging ; pathology ; surgery ; Humans ; Infant

Objective: To investigate the expression of Cyclin E in colorectal carcinoma and its significance.Methods: The Cyclin E expression and the cell proliferation(PI,SPF)in 30 cases of colorectal carcinomas (including tumors and normal tissues distant to the tumors)were respectively assayed with Flow Cytometry (FCM), and the relationships between the Cyclin E expressive rate and clinical pathologic features were compared. Correlaction between the Cyclin E expressive rate and the cell proliferation(PI, SPF) was analyzed too.Results: The Cyclin E positive rate and the cell proliferation in colorectal carcinoma were significantly higher than those of the distal normal tissues. As for the Cyclin E positive rate and the cell proliferation,no significant differences were found among the subgroups divided according to malignance, lymphatic metastasis and the site of tumor. There was a significant correlation between the Cyclin E positive rate and the cell proliferation.Conclusion: The Cyclin E overexpression plays an important role in the onset of colorectal carcinoma.The Cyclin E expressive rate is not consistent with the general clinical pathologic features,but with the cell proliferation. The Cyclin E expressive rate may be one of the potential prognostic indicators in coloretal carcinoma.

Objective To establish the quality control standards of Gehuang Huoxue Capsules. Methods TLC methods for identification of Radix Astragali and Radix Gentianae Macrophyllae were established. A simple HPLC method was established for the determination of Puerarin. Results The spots on TLC plates were clear without interference in the blank reference. The liner range of Puerarin was 0.020 79～0.665 2 mg/mL, r= 1.000 0. The average recovery of Puerarin was 100.1% and RSD=0.92%. Conclusion The method is simple, accurate, reproducible and can be used for the quality control standards of Gehuang Huoxue Capsules.

According to two theories,which are "traditional Chinese medicine researching is in the face of a complex opening gigantic system" and "Chinese materia medica compound(CMMC) is the natural combinatorial chemical libraries",the study on active fractions of CMMC has been facing to a complex system with a large number of data that is non-linear,multi-variable,and varieties related to each other.The thinking and method of "combinatorial screening" has been put forward based on these two theories,that is the principle "using the diverse structures of molecules to simulate the diverse organism" used in combinatorial chemistry and the data mining technique was taken into the study on complex system of CMMC.In order to create combinatorial libraries,the two methods were used to obtain the fractions of CMMC.Re-combination group of the CMMC was used,and various industrial separation techniques, such as resin,membrane,were used to replace the diversity of chemosynthesis routes to create "Building Block".Through data mining and knowledge discovery, the intrinsic correlation of CMMC "multi-components and multi-targets" between the chemical composition and the mechanism was carried out.The new technologies which aim at high-throughput screening of CMMC were explored,in order to provide the evidence for setting up an idea with "optimal separation" and optimization design about application system of refining technology.

Objective To investigate the changes in Doppler perfusion index(DPI)of the liver and the platelet derived-endothelial cell growth factor(PD-ECGF)in patients with liver metastasis from colorectal carcinoma by determination DPI and PD-ECGF mRNA and protein expression levels.Methods One hundred patients were enrolled,including 50colorectal carcinoma patients(22of whom with liver metastasis and 28patients without liver metastasis)and 50healthy subjects as control.For all the objects involved,hepatic perfusion was documented with color Doppler flow imaging,and the DPI(hepatic arterial/total liver blood supply)was computed.The expression levels of protein and mRNA of PD-ECGF in 50specimens of carcinoma and adjacent tissues of colorectal carcinoma were assayed by immunohistochemistry and real-time fluorescence quantitative PCR methods in patients with colorectal carcinoma.Results According to pathology and imaging results,the DPI of colorectal carcinoma patients with liver metastasis was significantly higher than that in healthy control group and non-liver metastasis group(P0.05).According to the results of immunohistochemistry and real-time fluorescence quantitative PCR,the expression levels of PD-ECGF protein and mRNA were significantly higher in colorectal carcinoma than that in adjacent tissues(P

Objective To study the role of endogenous telomerase catalytic inhibitor PinX1 in the progression of colorectal cancer tissue. Methods The expression of PinX1、telomerase subunits(hTERT) and telomere binding protein(hTRF1) was detected by semi-quantitative RT-PCR. Surgically resected colorectal cancer specimens in 66 cases were studied. Results PinX1 expression is significantly correlated with histologic differentiation,clinical stage and lymph node metastasis of colorectal cancer( Fd =11.40, Fs = 4.22,t =-2.81,P ≤0.05). The level of PinX1 was negatively associated with the expression of hTERT( r =-0.553,P