The level of HLA-antibody and sensitization can be predicated by the determination of panel reactive antibody(PRA)which is of great significance in preventing hyperaeute and accelcrated rejection.The sensitivity of PRA is markedly higher than CDC.The level of PRA(positive rate above 50%)is closely relevant,to the degree of rejection and the decrease of graft survival.Although plasma exchange(PE)can be used to decrease the level of PRA before transplantation to prevent hyperacute and accelerated rejection,good HLA-matching is more important in securing a successful graft patient.Control study between random panel lymphocytotoxicity test(RPLT)and PRA showed that RPLT is a simpler and more dependent and more easily practised method to predict the sensitivity of recipients of renal transplantation.

The relationship between the precision of the estimated sampling variances and the number of samples was quantitatively established. It revealed that the product of the standard deviation of the estimated samplingvariance and square root of the number of samples was a constant. Monte Carlo simulation technique was employed to verify the equation. Populations with Gaussian,unifohn random and multi-nomial(taking silicon carbide material as an example) distributions were studied with satisfactory results.

OBJECTIVE:To evaluate the inhibitory actions of 3 traditional Chinese drugs on human nasopharyngeal carcinoma cells CNE-2 in vitro.METHODS:The IC50(50% inhibiting concentration)of 3 traditional Chinese drugs on human nasopharyngeal carcinoma cells CNE-2 in vitro was measured by MTT assay.RESULTS:The inhibitory actions of 3 traditional Chinese drugs on human nasopharyngeal carcinoma cells CNE-2 in vitro were enhanced with the increase of the concentration in a concentration-dependent manner,with formulation Ⅲ showing the most potent inhibitory action on CNE-2 cells in vitro.CONCLUSION:The heat-clearing and detoxicating traditional Chinese drugs could markedly inhibit the proliferation of CNE-2 cells.

Objective To study the chemical constituents ofPronephrium triphyllum.Methods The chemical constituents in the plant were isolated and purified with silica gel and Sephadex LH-20.Their structures were identified by analyses of spectral data and physicochemical properties.Results Six compounds were isolated and identified as shelincaoide A(1),n-butyl-13-D-fructopyranoside(2),triphyllin A(3),6,7-di-hydroxycoumarin(4),daucosterol(5),and 13-sitosterol(6),respectively.Conclusion Compound 1 is found to be a new compound.Compounds 2 and 4 are firstly isolated from the plants in Pronephrium Presl.and all compotmds except 3 are obtained from the species for the first time.

OBJECTIVE:To study the hemostatic,antipruritic,and anti-crissal ulcer effects of Zhishuxi lotion.METHODS:The experimental animals were randomized into four groups(normal control group,Mayinglong-branded musk hemorrhoid ointment,Zhishuxi lotion high-dose group and low-dose group).The time needed to stop bleeding in all groups were tested by cutting mouse tail;the itch-threshold in each group of guinea pigs was determined by inducing itch with histamine phosphate;and the ulceration was observed by causing crissal ulceration in mice with acetic acid.RESULTS:Zhishuxi lotion could shorten the bleeding time,increase the itch threshold in guinea pig,and had some curative effect on acetic acid-induced crissal ulcer in mouse,as compared with the control group.CONCLUSION:Zhishuxi lotion has re-markable effects of hemostasis,itch-relief and anti-crissal ulceration.

OBJECTIVE:To establish the quality criteria for Huangzhi oral liquid.METHODS:TLC was employed to for the qualitative identificaiton of Radix et Rhizoma Rhei,Leech and Fructus Arctii;the content of total nitrogen was determined by KjeLdahL determination and content of Chrysophanol in Radix et Rhizoma Rhei in Huangzhi oral liquids was determined by HPLC.RESULTS:The TLC chromatograms of Radix et Rhizoma Rhei,Leech and Fructus Arctii presented the spots of the same colors with those at the corresponding places in the chromatograms of the controls.There was a good linear relationship within the concentration range of 1.696～ 8.480? g? mL-1 for Chrysophanol(r=0.999 8).The average recovery was 99.60%(RSD=1.37%,n=9).CONCLUSION:The methods are accurate and reliable with a strong specificity and can be used for the quality control of Huangzhi oral liquid.

Chloroplast genome sequences have comprehensive application prospects in DNA barcoding and chloroplast engineering in traditional Chinese medicine. The complete chloroplast genome of Magnolia officinalis sequenced by high-throughput pyrosequencing and a sequencing procedure was established. Fourteen contigs were obtained after de nove assembly. The sequencing percent of coverage was 99.99%. The chloroplast genome is 160 183 bp in size, and has a typical quadripartite structure with the large (LSC, 88 210 bp) and small copy (SSC, 18 843 bp) regions separated by two copies of an inverted repeat (IRs, 26 565 bp each). chloroplast genes were successfully annotated, of which 17 genes located in each IR region. The chloroplast genome features in Magnolia officinalis are nearly identical to those from other Magnoliid chloroplast genomes. Phylogenetic analyses were performed based on 81 shared coding-genes for a total of 9 Magnolia samples of 5 closely related species. Results showed that distinguishing among species was generally straightforward at the species and population level. This study confirmed the effectiveness of our chloroplast genome sequencing procedure. The chloroplast genome can provide distinguishing differences to help identify Magnolia officinalis and its closely related plants.

Objective To understand the genetic background of the specific pathogen-free Yorkshire and Landrace pigs, imported from Canada by Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences.Methods The population genetics were investigated by using 19 pairs of microsatellite primers.Results In the Yorkshire pigs and Landrace pigs, 84 and 89 alleles, respectively, were detected at 19 microsatellites loci.The average polymorphic informa-tion content and mean heterozygosity in the Yorkshire pigs were 0.5271 and 0.5877, and in the Landrace population were 0.5652 and 0.6066, respectively.Because of the significant ( P<0.01) differences of alleles in different loci such as S0155,S0143,S0178,Sw857 and Sw936, it made them possible to be used to identify Yorkshire and Landrace pigs′breed. F-statistics showed that the differentiation within the population was small and genetic structure was stable.Conclusions Compare with the domestic pedigree large White and Landrace pigs, the SPF pedigree pigs imported from Canada are more stable in genetic structure, and can be used as laboratory animal models in animal science research.

OBJECTIVE: To study the action mechanism of kunzao tiaozhi capsule in the treatment of fatty liver with hyperlipidemia.METHODS: A total of 59 rats were randomly divided into normal control group(n=10),model group(n=11),positive control group(n=10) and kunzao tiaozhi capsule group(at high,medium and low doses,n=9,9,10).Rat model with fatty livers was established in all the groups except the normal control group by feeding high-fat forage and 30% alcohol,and the corresponding solvents or medicine were given during the modeling,10 weeks later,the S-phase cell percentages(SPF) of the liver cells in rats and proliferation index(PI) were determined by flow cytometry methods.RESULTS: As compared with the normal control group,PI and SPF values in the modeled rats increased significantly(P

OBJECTIVE:To study the antipyretic and analgesic effects of Compound tuniuxi sirup.METHODS:Fever was induced by dry yeast in SD rats,then divided the rats into high-dose(33.12g/kg),medium-dose(16.56g/kg),low-dose(8.28g/kg)and control,aspirin group,observed the antipyretic effect;The mice were divided into high-dose(47.84g/kg),medium-dose(23.92g/kg),low-dose(11.96g/kg)and control,aspirin group,then were investigated with hot plate and acetic acid induced body twist.RESULTS:Compound tuniuxi sirup can markedly inhibit the fever in the model anmals 1 hour later,the effect of the high,medium groups are similar to aspirin;and could increase the pain threshold obviously(the low-dose group is obviously in 1.5h～2h(P