Objective:To research the TLC identification method for Longdan Xiegan pills( honey pills) . Methods:TLC was used in the identification. The samples were extracted by 70% methanol with a heating reflux method, and then extracted by the agents with dif-ferent polarity, including petroleum ether, ethyl acetate and butanol. The petroleum ether part was detected by fluorescence at 365nm for Angelica sinensis, and 1% vanillin-sulfuric acid color reaction was used to detect Alisma orientale. The ethyl acetate part was determined by fluorescence at 365nm for Scutellaria baicalensis, and the butanol part was detected with chloroform-methanol-water (30∶12∶3) as the developing solvent for Bupleurum and Glycyrrhiza, and with acetone-ethyl acetate-water (6∶6∶1) as the developing solvent for gentiopi-croside, geniposide and liquiritin. Results:The developed TLC spots were clear with good separation, high specificity and promising re-producibility. Conclusion:The method can be exactly used in the qualitative identification and quality control of Longdan Xiegan pills ( honey pills) .

Objective:To establish a method for the determination of 23-acetate alisol B in Longdan Xiegan honey pills by HPLC. Methods:The analysis was performed on a Waters Symmetry C18 (250 mm × 4. 6 mm,5μm) column with the mobile phase of acetonitrile-0. 1% phosphoric acid (62 ∶ 38). The flow rate was 1. 0 ml·min-1, the column temperature was 35℃ and the detection wavelength was set at 208nm. Results: The linear range of 23-acetyl alisol B was 19. 999 5- 1 999. 9500 ng(r =0. 999 9), and the average recovery was 95. 56%(RSD = 0. 7%, n = 6). Conclusion: The method is simple, rapid and accurate, and can be used to control the quality of Longdan Xiegan honey pills with good repeatability and recovery.

This study was aimed to investigate the methylation status of WT1 gene in leukemia cell lines and its relation with expression of WT1 gene. The WT1 gene was silenced by DNA methylation or histone deacetylation, and the expression of WT1 gene was induced by using HDAC inhibitor and/or demethylation agent of DNA. Some leukemia cell lines (U937, HL-60, K562, KG1) were detected by RT-PCR, MS-PCR, restriction analysis, and DNA sequencing. U937 leukemic cells without WT1 mRNA expression were incubated with HDAC inhibitor Trichostatin A (TSA) and/or demethylation agent decitabine. The results showed that the U937 cells did not express WT1 gene, but HL-60, K562 and KG1 cells highly expressed WT1 gene; WT1 gene was unmethylated in HL-60 cells, but methylated in K562 and U937 cells. WT1 expression could be reactivated by co-incubation with TSA and decitabine, but not was observed by using single drug. It is concluded that WT1 promoter is methylated in some leukemia cells, however, the methylation can not affect its expression. DNA methylation and deacetylation of histones are synergistic to inhibit the expression of WT1 in leukemic U937 cells, the combination of TSA with decitabine can induce expression of WT1 gene.
Azacitidine ; analogs & derivatives ; pharmacology ; DNA Methylation ; Gene Silencing ; HL-60 Cells ; Histones ; metabolism ; Humans ; Hydroxamic Acids ; pharmacology ; K562 Cells ; Promoter Regions, Genetic ; U937 Cells ; WT1 Proteins ; genetics

OBJECTIVETo study the chemical constituents of root of Actinidia macrosperma.

METHODChromatographic methods were used to isolate compounds from A. macrosperma and spectroscopic methods were used to identify the structures of the isolated compounds.

RESULTEight compounds were obtained and identified as 12-oleanene-2alpha, 3alpha, 24-triol (1), isotachioside (2), asiatic acid (3), catechin (4), epicatechin (5), ursolic acid (6), beta-daucosterol (7), beta-sitosterol (8).

CONCLUSIONAll these compounds were isolated from this plant for the first time, compound 1, 2 were obtained from this genus for the first time.

Actinidia ; chemistry ; Catechin ; chemistry ; isolation & purification ; Glucosides ; chemistry ; isolation & purification ; Hydroquinones ; chemistry ; isolation & purification ; Oleanolic Acid ; analogs & derivatives ; chemistry ; isolation & purification ; Pentacyclic Triterpenes ; Plant Roots ; chemistry ; Plants, Medicinal ; chemistry ; Triterpenes ; chemistry ; isolation & purification

To investigate the relationship between LRP15 gene promoter region methylation and its gene expression in acute leukemia patients, the status of LRP15 gene promoter region methylation was detected by MS-PCR and the gene expression was detected by RT-PCR in bone marrow samples from leukemia patients. The results indicated that the LRP15 gene expression was 47.6% in complete remission (CR) patients and 16.7% in non-CR patients respectively, while LRP15 gene promoter region methylation was 38.1% in CR group and 72.2% in non-CR group respectively. No relationship was found between LRP15 gene promoter region methylation and its expression (P = 0.0087). It is concluded that the methylation in LRP15 gene promoter region may not be the only reason for LRP15 gene silence.
DNA Methylation ; Female ; Gene Expression Regulation, Neoplastic ; Humans ; Leukemia, Myeloid, Acute ; genetics ; pathology ; Male ; Neoplasm Proteins ; biosynthesis ; genetics ; metabolism ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; genetics ; pathology ; Promoter Regions, Genetic ; genetics ; Reverse Transcriptase Polymerase Chain Reaction

LRP16 is a novel gene which was found in our laboratory by using methylation-sensitive restriction landmark genomic scanning (RLGS) technique. In order to clone the full-length cDNA of this leukemia relapse associated gene, the method of rapid amplification of cDNA end (RACE) was employed. By optimizing some procedures of RACE method, the 5'- and 3'-untranslated region of LRP16 cDNA was successfully sequenced. Then, the full length of LRP16 cDNA and open reading frame (ORF) was constructed and was registered in GenBank. The above-mentioned procedure demonstrated RACE technique is a rapid and sensitive method for cloning unknown gene. Especially, it is very useful to cloning the 5'- and 3'-untranslated region of a novel gene.

AIMTo study the effects of hypoxic preconditioning on anoxic tolerance and Jun expression in cultured rat hippocampal neurons after anoxia/reoxygenation.

METHODS12 day cultured hippocampal neurons in control and hypoxic preconditioning group were exposed to anoxic environment (0.90L/L N2 + 0.10 L/L CO2) for 4 h, and then reoxygenated for either 24 h or 72 h. The neurons were immunocytochemically stained using the antiserum against Jun. The number of survival neurons and the percentage of Jun expressing neurons were investigated.

RESULTSThe percentage of Jun expressing neurons induced by anoxia in hypoxic-preconditioning group was significantly less than that in control group. The number of survival neurons was more in the hypoxic-preconditioning group than that in control group after anoxic reoxygenation.

CONCLUSIONHypoxic-preconditioning can induce the development of anoxic-tolerance in cultured hippocampal neurons. The decrease in Jun expressing neurons in hippocampus may be an adaptive reaction to acute anoxia.

Animals ; Animals, Newborn ; Cell Hypoxia ; Cells, Cultured ; Genes, jun ; Hippocampus ; metabolism ; Neurons ; metabolism ; Oxygen ; metabolism ; Rats ; Rats, Wistar

Using transplantable erythroblastic leukemia cells of EL9611(H-2d), the cells were inoculated to CB6F(1)(H-2d/b) generation of BALB/c x C57BL/6 mouse, the biological characterization of erythroblastic leukemia in haploidentical mouse was studied, that provides an experimental model for the study of graft-versus leukemia (GVL) with bone marrow or stem cell transplantation. When 10(3) - 10(8) of the spleen cells of EL9611(H-2d) had been intravenously inoculated to CB6F(1) mouse, the erythroblastic leukemia cells were transplanted successively and the F(1) generation of erythroblastic leukemia model in mice was established with 100% incidence of erythroblastic leukemia. There was a linear relationship between the survival time and the number of leukemic cell. The survival time of the mice was (9.6 +/- 0.8) days when 10(6) cells were inoculated. If the CB6F(1) mouse was transplanted successively for four generations, the incidence was 100%. The main targets for the leukemic EL9611(H-2d) cells were liver, spleen and marrow. The reaction of the erythroblastic leukemia cells for hemoglobin staining was positive, while the peroxidase reaction was negative. These cells were sensitive to some chemotherapeutic drugs, such as cytosine arabinoside and cyclophosphamide. This study presents the convenience for the studies on the GVL with haplo-allogeneic transplantation, in the F(1) generation of erythroblastic leukemia model of the commonly-used CD57BL/6 x BALB/c mouse.
Animals ; Cell Division ; Disease Models, Animal ; H-2 Antigens ; analysis ; Leukemia, Erythroblastic, Acute ; immunology ; pathology ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Inbred Strains ; Neoplasm Transplantation ; Survival Analysis ; Tumor Cells, Cultured

OBJECTIVETo analyse the WT1 expression and its DNA methylation status of its promoter domain.

METHODThe expression of WT1 gene and its DNA methylation status were assayed in leukemia cell lines and normal peripheral blood mononuclear cells (PBMNC) by RT-PCR and MS-PCR.

RESULTSWT1 was overexpressed in HL60, K562 and KG1 leukemia cell lines, but not in U937 and PBMNC. Methylation of WT1 promoter was not observed in HL60 cells.

CONCLUSIONDNA methylation of WT1 gene promotor did not inhibit its expression. Other mechanisms may appear to regulate the WT1 expression.

Cell Line, Tumor ; DNA Methylation ; Genes, Wilms Tumor ; Humans ; Leukemia ; genetics ; Polymerase Chain Reaction ; Promoter Regions, Genetic

Objective To study the bone biomechanics of the rabbit osteoporosis models induced by dexamethasone sodium phosphate injection (DX) using a combined treatment modality of 99Tc-MDP and GuKangLing.Methods Rabbits were intramuscularly injected with DX (2 mg/kg) twice a week for 6 weeks.The animal osteoporosis model group (Group C) and normal group (Group A) were compared to confirm the model was available.Another control group (Group B),the osteoporosis control group (Group D) were set for the comparison at the end of the experiment.The 99Tc-MDP therapy group (Group E),GuKangLing therapy group (Group F) and 99Tc-MDP plus GuKangLing therapy group (Group G) were included in the study.The treatment lasted for 16 weeks.The bone biomechanics,cytopathology bone histomorphology,bone mineral density (BMD),X-ray,CT,bone scintigraphy and serum bone alkaline phosphatase (BALP)and P (bone gla protein) were chosen as the markers or methods to evaluate the treatment results (excellent,effective and invalid).The analysis of variance (ANOVA) and t-test were used for group comparison analysis.Results Cytopathology result indicated that there was no bone trabecula destruction in Group A.However,there was distinct bone destruction in Group C.The bone biomechanics (left femur head (265.914 ±52.773) N,L4(369.671 ±94.919) N),BMD(left femur (0.238 ±0.016) g/cm2,L4(0.236 ±0.016) g/cm2)and bone histomorphology ( (66.230 ± 10.848) ％ ) in Group C reduced clearly as compared with Group A ((405.343±55.410) N,(750.870±53.718) N,(0.294±0.017) g/cm2,(0.302±0.023) g/cm2,( 131.500 ± 21.846) ％ ) ( t ≥4.550,all P ＜ 0.01 ).Radionuclide bone scan also showed that the uptake of tracers was higher by the main arthrosis in Group C than that in Group A.Vertebra was not clearly visualized on bone scan image.There were significant differences between Group A and Group C in serum BALP and P ((45.000±7.303) vs (12.485 ±1.512) U/L,(0.168±0.018) vs (0.115 ±0.017) μg/L,t =4.126,5.476,both P ＜ 0.01 ),which indicated that the animal osteoporosis model was available.The pathological results showed an improved recovery of bone structure and trabecular in Groups E and G,but a worse recovery in Group F.Biomechanics result in Groups E and G (left femur head (386.457 ±77.077) N and (432.771 ± 17.525) N,L4(649.550 ± 126.859) N and (655.443 ±76.555) N) improved apparently,which were similar to Group B.The radiotracer uptake in Group F was lower than that in group D.The bone biomechanics,bone histomorphology,BMD,serum BALP and P after the treatment showed significant differences in Groups E,F and G (F:8.556 - 31.608,all P＜0.01 ),and the bone biomechanics result in Group G was a little better than that in Group E (t =2.625,P ＜ 0.05 ).The results of Group G and E were considered as excellent,and Group F was considered as effective.Conclusions The treatment of 99Tc-MDP combined with GuKangLing could improve the bone biomechanics of rabbit osteoporosis models and may be a potential method to increase the bone strength for resisting external force.