Dendritic cells,as professional antigen presenting cells in vivo,can activate T cells,participate in allograft rejection,and play an important role in inducing immune tolerance.They have drawn wide attention from medical researchers,particularly in the field of organ transplantation.This review updates the researches on dendritic cell-induced transplantation tolerance and looks into the prospect of the application of dendritic cells in organ transplantation.

Heme oxygenase(HO) is a rate-limiting enzyme that catalyzes heme degradation.It catabolizes heme into 3 products: carbon monoxide(CO),free iron and bilirubin,which play an important role in keeping the steady state of the organism.In recent years,some studies show that the promotion of HO-1 expression can reduce ischemia-reperfusion injury of an organ transplant and regulate the transplantation immunological rejection.It has an important application prospect in liver transplantation.

Liver transplantation,as a new treatment for terminal-stage liver diseases,has made remarkable strides in the past decades.Animal models play an essential part in liver transplantation research,but differ from one another and have different limits to be used in imitating human clinical conditions.Therefore,it is the base for the development of liver transplantation to build and improve animal models by correctly selecting and utilizing different characteristics of different animals.

MicroRNA(miRNA),as a class of newly discovered non-protein-coding RNA,is present in eukaryote cells and plays a critical post-transcriptional repressor role in the regulation of gene expression.Many methods have been developed for the harvesting,detection and identification of miRNA and its target genes.Although hundreds of miRNA has been predicted and demonstrated in animals and plants,their definite mechanism,function and target genes are still unknown.Here is a reviews of the research advances methodology of detecting miRNA.

Objective To evaluate the effect of trimetazidine pretreatment on myocardial injury induced by propofol in rats.Methods Forty healthy Sprague-Dawley rats,weighing 240-250 g,aged 2.5 months,were randomly divided into 4 groups (n =10 each):fat emulsion group (group L),propofol group (group P),and different doses of trimetazidine groups (TL and TH groups).In group L,10％ fat emulsion was infused intravenously for 12 h at a rate of 30 mg·kg-1 ·h-1.In group P,1％ propofol was infused intravenously for 12 h at a rate of 30 mg·kg-1 ·h-1.In TL and TH groups,trimetazidine 2 and 5 mg/kg were injected intravenously,respectively,and 1.5 h later propofol was infused intravenously for 12 h at a rate of 30 mg·kg-1 ·h-1.At 6 and 12 h after beginning of administration,blood samples from the internal jugular vein were taken for determination of the levels of serum creatine kinase (CK),creatine kinase isoenzyme-MB (CK-MB),lactate dehydrogenase (LDH),α-hydroxybutyric acid dehydrogenase (α-HBDH),cardiac troponin Ⅰ (cTnⅠ),triglycerides (TG),low-density lipoprotein (LDL) and high-density lipoprotein (HDL).After blood sampling at 12 h after beginning of administration,myocardial specimens were obtained for microscopic examination of the pathological changes with light and electron microscope.Results Compared with group L,the serum CK,CK-MB,LDH,α-HBDH,cTnⅠ and TG levels were significantly increased,HDL was decreased,and no significant changes were found in LDL concentrations in P and TL groups,and the serum TG,HDL and LDL were increased,and no significant changes were found in the other parameters in group TH.Compared with group P,the serum CK,CK-MB,LDH,α-HBDH,and cTnⅠ levels were significantly decreased in TL and TH groups,the serum TG level was increased in TL group,and the serum TG,HDL and LDL levels were increased in TH group.Compared with group TL,the serum CK,CK-MB,LDH,α-HBDH and cTnⅠ levels were significantly decreased,and the serum TG,HDL and LDL levels were increased in group TH.Conclusion Trimetazidine pretreatment can attenuate myocardial injury induced by propofol,but it induces increase in blood lipids.

Objective To evaluate the effects of meglumine cyclic adenylate (MCA) pretreatment on acute lung injury (ALI) induced by lipopolysaccharide (LPS) in rats.Methods Fifty-four adult male Sprague Dawley rats,aged 2-3 months,weighing 200-250 g,were randomly divided into 3 groups (n =18 each) using a random number table:control group (group C),ALI group and MCA pretreatment group (group MCA).ALI was induced with LPS 10 mg/kg injected via the femoral vein in ALI and MCA groups.In group MCA,MCA 2 mg/kg was injected via the femoral vein at 20 min before LPS injection,while the equal volume of normal saline was given in C and LPS groups.Immediately before LPS injection and at 2 and 4 h after LPS injection,the blood samples were taken from the abdominal aorta for determination of PaO2,PaCO2 and plasma concentrations of tumor necrosis factor-alpha (TNF-α) and interleukin-10 (IL-10).Six rats were sacrificed at 4 h after LPS injection and pulmonary specimens were obtained for microscopic examination of the pathological changes and for determination of cyclic adenosine monophosphate (cAMP) activity (by ELISA) and NF-κB p65 expression in nucleus (by Western blot).Results Compared with group C,PaO2 and cAMP activity in lung tissues were significantly decreased,and PaCO2,plasma concentrations of IL-10 and TNF-α and NF-κB p65 expression in nucleus in lung tissues were increased in group LPS.Compared with group LPS,PaO2,cAMP activity in lung tissues and plasma concentrations of IL-10 were significantly increased,and PaCO2,plasma concentration of TNF-α and NF-κB p65 expression in nucleus in lung tissues were decreased and the pathologic changes of lungs were attenuated in group MCA.Conclusion MCA pretreatment can attenuate ALI induced by LPS,and the mechanism is related to increased level of cAMP,activated cAMP signaling pathway,inhibited NF-κB activity and reduced inflammatory responses in lung tissues of rats.

Enterprise and competent department in China start to explore evaluation method and technique,as revaluation of Chinese patent medicine has been paid high attention in recent years.However,many problems of Chinese patent medicine standard itself commonly have been neglected in the revaluation of curative effect.This review comprehensively analyzed problems have to be faced in the revaluation of the curative effect of Chinese patent medicine,such as excessive broad expressions of function and indication,obscure definition of indication,identification between function and indication,correspondence of diseases and syndromes between Chinese and western medicine,feasibility of clinical trials,with the provision of general methods and solutions.

OBJECTIVE:To establish a method for the contents determination of phospholipid and γ-linolenic acid in Com-pound linolenic acid soft capsule. METHODS:HPLC was conducted to determine the content of soybean lecithin;the column was Agilent TC-C18 with mobile phase of methanol-water(84:16,V/V)at a flow rate of 1.0 ml/min,the detection wavelength was 219 nm,the column temperature was 30 ℃,and the injection volume was 10 μl.Gas chromatography was conducted to determine the content of γ-linolenic acid in the preparation;the column was DB WAX,injector temperature was 210 ℃ by temperature pro-grammed,carrier gas was helium at a flow rate of 1 ml/min by split injection(split ratio of 1:30),and the injection volume was 0.02μl. RESULTS:The linear range was 4.64-16.24μg/ml for phospholipid(r=0.999 6)and 0.093 44-0.327 04μg/ml forγ-linole-nic acid methy ester(r=0.999 6);RSDs of precision,stability and reproducibility tests were lower than 3%;recoveries were 97.44%-99.36%(RSD=0.93%,n=6) and 97.22%-99.07%(RSD=1.01%,n=6),respectively. CONCLUSIONS:The method is simple,stable with good separation,and can be use for the contents determination of phospholipid and γ-linolenic acid in Com-pound linolenic acid soft capsule.

OBJECTIVE:To establish the HPLC fingerprint for Anemone raddeana. METHODS:HPLC was performed on the column of Phemomenex Gemini C18 with mobile phase of 0.1%phosphoric acid-acetonitrile(gradient elution)at a flow rate of 1 ml/min,the detection wavelength was 206 nm,the column temperature was 30℃,and the injection volume was 20μl. With the refer-ence of raddeanin A,13 batches of A. raddeana were analyzed,chromatographic fingerprint similarity evaluation system software was conducted for similarity analysis,and SPSS 13.0 was conducted for cluster analysis. RESULTS:There were 11 common peaks in the 13 batches of A. raddeana with similarity of higher than 0.90. According to the verification,the fingerprint and control fin-gerprint shows good consistency. The drugs in Huadian,Jiaohe, Tiangang,Shulan,Tonghua and Fusong of Jilin and Shangzhi of Heilongjiang were regarded as category 1,and in Harbin,Yabuli town and Yimianpo of Heilongjiang,Qingyuan of Liaoning,Ji-nan of Shandong were category 2. CONCLUSIONS:The established fingerprint can provide reference for the identification and quality evaluation of A. raddeana.

ObjectiveTo investigate the effects of HO-1 on mast cells degranulation during liver ischemia/reperfusion injury.MethodsSD rats ( n =20) were randomly divided into 4 groups : ( 1 ) sham operation group, (2) ischemia/reperfusion injury group (I/RI group), (3) CoPP group, CoPP was given before 24 h(5 mg/kg), (4) ZnPP group, ZnPP was given before 24 h (20 mg/kg). The rat model of liver ischemia/reperfusion was built. Samples were collected after 2 hours reperfusion. HO-1 mRNA expression was assessed by RT-PCR. The expression of HO-1 protein was assessed by Western blot. Serum ALT, AST levels were determined. The amount of degranulated mast cells were detected by toluidine blue staining. Liver injuries were evaluated by HE staining.ResultsCompared to sham group, liver HO-1mRNA and protein expression, ALT, AST levels, the number of degranulated mast cells significantly increased in I/RI group, CoPP group and ZnPP group. Moreover, liver injuries were more serious. Compared to I/RI group, there were increased HO-1mRNA and protein expression, reduced ALT, AST levels and the number of degranulated mast cells, also reduced liver injuries were found in CoPP group. Compared to I/RI group, the expression of HO-ImRNA and protein was down-regulated, ALT, AST levels elevated and the number of degranulatedmastcellsincreasedaccompanyingmoreseriousliverinjuriesinZnPPgroup.ConclusionsHO-1 overexpression reduces liver ischemia/reperfusion injury, possibly by inhibiting mast cells degranulation in liver tissues.