The absorption process is an important factor in determining the bioavailability of orally administered drugs. however, the absorption mechanism of many drugs is not clear. Caco-2 cell model is the best in vitro absorption model nowadays. It is widely used in the research on drug absorption process and absorption mechanism, especially in the aspect of traditional Chinese medicine absorption, the use of Caco-2 cell model has become the hot spot recently. Mo- reover, Caco-2 cell model is also applied in the research on drug metabolism. Therefore, Caco-2 cell model will become an important method in the research of drug absorption, and will be helpful to accelerate the process of new drug screening and development.

Objective To investigate the differential gene expression in chronic hepatitis B (CHB) patients with typical syndromes of traditional Chinese medicine ( TCM) syndromes, and to explore the relationship between TCM syndromes and gene expression. Methods Peripheral blood samples were collected from CHB patients and healthy volunteers before treatment. After total RNA of leukocytes was isolated, the gene expression profiles were detected by microarray. The expression levels of partial genes were tested by real-time quantitative reverse transcription-polymerase chain reaction (RT-PCR) . Results Microarray analysis results showed that there were significant differences of gene expression between CHB patients and healthy volunteers, and among CHB patients with the syndrome of liver-qi stagnation and spleen deficiency, syndrome of damp-heat accumulation, and syndrome of liver-kidney yin deficiency. The results of gene ontology ( GO) and signal pathway analysis between the healthy control and CHB patients with various syndromes showed that the specially-regulated genes of CHB patients with liver-qi stagnation and spleen deficiency were mainly related to cytokinetic process, those in patients with dampness-heat accumulation were mainly related to the positive regulation of lipid storage, and those of patients with liver-kidney yin deficiency were mainly related to the activities of nitric oxide synthase regulator. The real time RT-PCR for partial genes presented the similar results with those of gene microarray. Conclusion There are specific expression profiles of differential genes and significant differential genes in CHB patients with the syndrome of liver-qi stagnation and spleen deficiency, syndrome of damp-heat accumulation, and syndrome of liver-kidney yin deficiency, which may be the molecular foundation for the classification of TCM syndromes of CHB patients.

0.05).Conclusion CAP infiltration at trigeminal nerve infraorbital branch region in rats can produce stronger analgesic effect,it related to the dosage,concentration,using dosage, time and intermission.

Objective To study proliferation,secreted cytokines,immune phenotypes and cytotoxicity on Raji cells by cytokine induced killer (CIK) cells co-cultured with dendritic cells (DC).Methods The mononuclear cells from peripheral blood of healthy individuals were extracted,then cultured the cells under 5 ％ CO2 at 37 ℃ for 2 hours.DC were induced from suspended cells,and CIK cells were from adherent cells.After 9 days of nurturing,two types of cells were mixed.CIK cells were cultured alone as the control.The cytotoxic activity of CIK and DC-CIK cells were detected by MTT assay.The morphologies,proliferation,secreted cytokines,and immune phenotypes of the two cells in day 0,3,6,9,12,15 in culture were monitored.Results In day 12 in culture,comparing with CIK cells,DC-CIK cells significantly enhanced the proliferation rate [(42.44±2.68) fold vs (30.01±2.05) fold] (t =11.64,P ＜ 0.05) and had increased IL-2,IFN-γ,IL-12 and TNF-α secretion [(124.34±12.57) ng/L vs (56.32±6.58) ng/L,(496.60±95.32) ng/L vs (247.80± 69.45) ng/L,(84.92±6.07) ng/L vs (24.18±3.31) ng/L,(380.6±45.95) ng/L vs (196.61±24.19) ng/L] (t =15.16,P ＜ 0.05; t =6.67,P ＜ 0.05; t =27.78,P ＜ 0.05; t =11.20,P ＜ 0.05),and there were more CD3+ CD8+ cells and CD3+ CD56+ cells in the co-culture [(71.79±1.73) ％ vs (60.37±3.24) ％,(48.54±3.30) ％ vs (33.07±2.22) ％](t =9.83,P ＜ 0.05; t =12.30,P ＜ 0.05),and DC-CIK cells had a significandy increased cytotoxicity on Raji cells in vitro at the same ratio of effector cells to target cells.Conclusion CIK cells have higher proliferation rate and cytotoxicity against Raji cells when co-cultured with DC.

To investigate the differential gene expression profile in two typical traditional Chinese medicine (TCM) syndromes of patients with chronic hepatitis B (CHB), and to find the relationship between TCM syndromes and gene expressions.

BACKGROUND:Mesenchymal stem cells are found to have the immunoregulatory activities and a potential application prospect in the treatment of autoimmune diseases.
OBJECTIVE:To explore the mechanism of transplanting mesenchymal stems cells on the treatment of multiple sclerosis.
METHODS:The mouse mesenchymal stems cells were prepared, and injected into the al ogenic and syngenic normal mice, to detect the frequency of CD4+CD25+Foxp3+T cells in the spleen, thymus, and lymph nodes by flow cytometry, and to detect the Foxp3, transforming growth factor-β1, and interleukin-10 mRNA in the spleen, thymus, and lymph nodes by reverse transcription-PCR.
RESULTS AND CONCLUSION:Transplantation of mesenchymal stem cells on normal mice led to a significant up-regulation of CD4+CD25+Foxp3+T cells, Foxp3, transforming growth factor-β1, and interleukin-10 mRNA in the spleen, thymus, and lymph nodes both in the al ogenic and syngenic transplant groups. Transplantation of mesenchymal stem cells may be an available method in the treatment of autoimmune diseases, and CD4+CD25+Foxp3+T cell, Foxp3, transforming growth factor-β1, and interleukin-10 may be involved in this process.

Objective To analyze the airflow characteristics and investigate the relationship of the structure and the function of nasal cavity by the three?dimensional reconstruction of nasal airway of patients with structural abnormalities(nasal septum deviation)and healthy people and the estab?lishment of finite element model by computer. Methods On the basis of CT imaging of the nasal cavity in patients with structural abnormalities(na?sal septum deviation,n=20)and healthy people(n=20),three?dimensional reconstruction of nasal airway was conducted by resurfacing finite ele?ment subdivision to simulate the characteristics of airflow in nasal cavity. Results The airflow mainly went through the commodious side of the nose in patients with nasal septum deviation and the maximum fluence appeared in the middle part of meatus nasi communis. The airway pressure de?creased most significantly in the most flank?curvature part of nasal septum deviation,accounting approximately 79.65%of the total pressure. In healthy people,the bilateral airflow was affected by nasal cycle and was mainly characterized by one nasal cavity,and the maximum fluence was ob?served in the middle and the inferior part of meatus nasi communis. The airway pressure decreased most significantly in limen nasi,accounting ap?proximately 58.78%of the total pressure. Conclusion Numerical modeling of nasal cavity can be used to analyze the relationship between the nasal structural abnormalities and the airflow characteristics,which is a scientific method to analyze the association of nasal structure and function with dis?ease and can be used for pre?and post?operative individual evaluation of operative therapeutic regimen targeting at optimizing airway and altering air?flow distribution.

Objective To evaluate the effects of Radix Astr agali combined with prednisone and i mmunosuppressant for primary nephrotic syndrome (PNS)in adults and to compare the effects o f Radix Astragali in various prepata tions for PNS.Methods Randomized controlled trials were a pplied for systemic reviews.Electr onic and manual retrieve of Medline,Embase,Cochrane Library,CBMdisc a nd CEBM/CCD and relevant medical jou rnals in China were applied to search the RCTs of Radix Astragali,non -specific treatment,glucocorticoids and i mmunosuppresants for PNS,and the RCTs were analysed with RevMan 4.1.Results There were 14randomized controlled trials with 524cases involved.Meta-analysis showed that Radix Astragali could in crease the therapeutic effect of pre dnisone and immunosuppressant for PNS and re-duce its recurrence.Radix Astragali also had an effect in decreasing 24-hour proteinuria content and the pla sma levels of total cholesterol and albumin.There were no differences between single injection and compound decoction.Asymmetry showed in"Funnel plot"may be related to publication bias,l ow quality of methodology and small -size in sample.Conclusion Radix Astragali and its prescriptio n may become a prospect therapy for PN S and its recurrence and the com-bination of traditional Chinese med icine and western medicine can be more effective for PNS.The dedinite effect of Radix Astragali for PNS will be further con firmed by multiple -center,large -s ample randomized controlled trial.

Objective To study the killing effects of the killer cell immunoglobulin-like receptors (KIR)2DS1-mediated natural killer (NK) cells against dendritic cells (DCs) and analysis the expression of chemokine receptor CCR7 after KIR2DS1-positive NK cells interact with the C2 epitope DCs in vitro,and explore the mechanism of alloreactive NK cell to limit graft-versus-host disease (GVHD).Methods NK cells were separated by Rosettesep NK sorting kit from healthy donor peripheral blood and taken as effector cells.The mononuclear cells from peripheral blood of newly diagnosed acute myeloid leukemia (AML) patients,and DCs were induced as target cells.Polymerase chain reaction and sequence specific primers (PCR-SSP) genotyping techniques and direct sequencing SBT were used to detect KIR gene,HLA-Cw of the healthy donors and patients.The cytotoxic activity of KIR2DS1-positive NK cells or KIR2DS1-negative NK cells against DCs were detected by CCK-8 assay.The expression of CCR7 after NK cells interacted with DCs was detected by flow cytometry.Results The purity of NK cells analyzed by flow cytometry was (94.20±1.23) ％.Under same target ratio (10∶1),the killing effect of KIR2DS1+ NK cell against DCs was higher than that in KIR2DS1-NK cells (t =3.70,P ＜ 0.05).Under same target ratio (10∶1),the cell lysis in C1/C1 group,KIR2DS1+ NK cells against C2/C2 group DCs (15.06±1.81) ％ was significantly higher than that against C1/C1 group (10.07±1.03) ％ and C1/C2 group (8.65±0.93) ％ DCs (F =56.368,P =0.001).KIR2DS1 + NK cells efficiently acquired CCR7 upon coculture with C2 epitope DCs.Conclusions NK cell expressing the KIR2DS1-activating receptor efficiently kill DCs,prevent GVHD,while enable NK cell acquire CCR7,obtaining migratory properties in vitro.

Objective: To establish a method for indentification of the podophyllum emodi species, Radix Clematis and Radix Gentiana species. Methods: HPLC/UV fingerprint analysis method of toxic ingredient podophyllotoxin and its derivatives were developed, and the method had been evaluated. Results: The methodological evaluation showed that this method had a good repeatability and reproducibility, and different samples had different HPLC fingerprints. Conclusion: This method can be used to differentiate podophyllum emodi from two commonly used medicinal herbs of a different genus but having similar appearance, Radix Clematis and Radix Gentiana.