AIM: To observe the effect of glycine on the myocardial ischemic injury in mice METHODS: Mice were supplied with 20% glycine twice daily (0 025 mL/g, ig), or 40% Injection salviae miltiorrhizae composita (ISMC, 0 025 mL/g, ig) One week later, 0 02 U/g pituitrin was injected intraperitoneally The electrocardiogram was recorded, and activities of nitric oxide synthase (NOS), superoxide dismutase (SOD) and the content of malondiadehyde (MDA) in the myocardium were examined RESULTS: Glycine reduced changes in J spot in electrocardiogram Both glycine and ISMC increased activities of SOD and NOS, inhibited increase in MDA content in the myocardium induced by pituitrin There was no difference in above parameters between glycine-treated and ISMC-treated mice. CONCLUSION: These results demonstrated that glycine can protect myocardium from ischemic injury, the mechanism may be related to increase in activities of NOS, SOD and supressing the lipid peroxidation.

[ ABSTRACT] AIM:To explore the role of Huoxue Jiangzhi Recipe in preventing and treating fatty liver in mice and its underlying mechanisms.METHODS:Healthy Kunming mice were fed with high-fat diet and treated intragastrically with different doses of Huoxue Jiangzhi Recipe ( compound of ginseng, panax notoginseng and rhizoma gastrodiae, named as GST) for 2 weeks.The levels of blood lipids and triglyceride ( TG) in hepatic tissues were measured.Meanwhile, liver in-dex and hepatic pathology were observed.The optimized dosage of Huoxue Jiangzhi Recipe was determined by the experi-ments.The mice were divided into normal control group ( NC group, fed with normal diet) and model group ( fed with high-fat diet) .The model mice were subdivided into 3 subgroups 12 weeks later:HF group ( fed continuously with high-fat di-et) , ND group ( fed with normal diet) , GSL group ( fed with normal diet and treated intragastrically with GSL) .The mice in NC, HF and ND groups were given distilled water by gastric perfusion.Two weeks later, all mice were killed, and blood was collected for measuring serum total cholesterol (TC),TG,high-density lipoprotein-cholesterol (HDL-C), low-density lipoprotein-cholesterol ( LDL-C) contents, hepatic TC, TG, malondialdehyde ( MDA ) levels and superoxide dismutase ( SOD) activity were detected.Moreover, liver index and hepatic pathology were also observed.The mRNA expression of peroxisome proliferator-activated receptor alpha (PPARα) and cytochrome-P450 2E1 (CYP2E1) in the liver was examined by RT-PCR.RESULTS:GST significantly decreased serum lipid, hepatic lipid and MDA levels and elevated SOD activi-
ty.Furthermore, GST markedly reduced liver index, improved hepatic adipose infiltration, increased PPARαmRNA ex-pression and inhibited CYP2E1 mRNA expression.CONCLUSION:GST is effective in the treatment of fatty liver in mice by up-regulating PPARα, thus reducing serum and hepatic TG levels, down-regulating CYP2E1 and inhibiting lipid peroxi-dation.

BACKGROUND: In recent years, nano-carriers have been regarded as the most promising technologies for breakthrough the bottleneck of gene transfer. Polyamidoamine dendrimer (PAMAM) is a kind of new nanometer material. PAMAM can transfer target gene to the cell with high efficiency and lower toxic both in vivo and in vitro.OBJECTIVE: To evaluate the antitumour effects of survivin antisense oligonucleotide (Survivin-asODN) carried by PAMAM on colorectal cancer transplanted subcutaneously in nude mice.DESIGN, TIME AND SETTING: An in vivo experiment regarding tumor gene therapy was performed from February to August in 2008 at the Laboratory of Bionanometer Engineering, Research Institute of Micro/nanometer Science & Technology of Shanghai Jiao Tong University and Central Laboratory of Zhujiang Hospital of Southern Medical University.MATERIALS: Human colorectal cancer cells SW620 were from Shanghai Cell Institute of Chinese Academy of Sciences.PAMAM dendrimer was offered by the Bionanometer Engineering Laboratory, Research Institute of Micro/nanometer Science & Technology, Shanghai Jiao Tong University. Lipofectamine ~(TM)2000 was purchased from Invitrogen, USA. Survivin-asODN was synthesized by Shanghai Bioengineering Company.METHODS: The PAMAM and cation liposome were respectively mixed with Survivin-asODN to generate the transfection complex carrying antisense gene. The shape of the complex was observed by transmission electron microscope, the particle size was determined by laser particle size analysator and the zeta potential was measured by an analytical tool. The encapsulating efficiency and release progress in vitro were determined by ultraviolet spectrophotometer in centrifuging method. Human colorectal cancer cells SW620 at logarithmic phase were inoculated into the abdominal region of 18 Blab/C nude mice subcutaneously to produce transplanted tumor models in colorectal cancer nude mice, which were randomly divided into 3 groups: liposome, PAMAM and blank control groups. They were injected respectively with Hposome-survivin-asODN complex,PAMAM-survivin-as ODN transfection complex and seroculture liquid. The volumes of tumor were surveyed in the 2 groups.Western blotting method was used to determine the survivin gene expression in the transplanted tumor tissue.MAIN OUTCOME MEASURES: Particle size, zeta potential, gene loading level, encapsulation efficiency, release rate of cationic liposome-survivin-asODN complex and PAMAM-survivin-asODN complex, as well as survivin expression rate and apoptosis rate after transfection, inhibition rate of the transplanted tumor growth, Survivin protein expression and activity in the transplanted tumor cells.RESULTS: The particle size of PAMAM-survivin-asODN complex was smaller (P < 0.01), but the zeta potential was greater (P < 0.05), compared with liposome-survivin-asODN. There was no significant difference between PAMAM and liposome groups in terms of gene loading rate and transfection efficiency. DNA release lasted for 14 days for PAMAM, but only 5 days for liposome.After colorectal cancer cell transfection, survivin protein expression was lower, but apoptosis rate was higher, in the PAMAM-survivin-asODN complex than in the liposome-survivin-asODN complex (P < 0.05).CONCLUSION: PAMAM facilitates delivery of Survivin-asODN into transplanted colorectal cancer cells SW620. As a result,survivin protein expression was decreased, and apoptosis rate was increased in vivo which inhibited transplanied tumour growth.

By way of gastrogavage, we administered CANELIM capsules to rat for prepering the drug-contained serums. And then the serums obtained were used to plant cholangiocarcinoma cells. Lastly, using the micropipette aspiration technique, we investigated the effects which the drug-contained serums of different doses have on the viscoelasticity and adhesive mechanical properties of cholangiocarcinoma cells. The results showed that cholangiocarcinoma cells presented a characteristic of high elastic coefficient and low viscous coefficient. After being treated by the high dose and middle dose drug-contained serums, the viscoelastical properties of cholangiocarcinoma cells K1, K2 and micro evidently decreased (P < 0.01). But the properties of low dose did not evidently change. The adhesive force between cholangiocarcinoma cells and CD44v6 protein significantly reduced with the increasing of the dose of CANELIM capsules (P < 0.01). It is suggested that CANELIM capsules would destroy the cytoskeleton of cholangiocarcinoma cells, restrain the adhesion molecule CD44v6 on membrane from expressing, reduce the adhesion probability between cholangiocarcinoma cells and vasal endothelial cells, and finally, prevent the metastasis of cholangiocarcinoma cells.
Animals ; Antineoplastic Agents, Phytogenic ; pharmacology ; Bile Duct Neoplasms ; pathology ; Bile Ducts, Intrahepatic ; pathology ; Capsules ; Cell Adhesion ; drug effects ; Cholangiocarcinoma ; pathology ; Drugs, Chinese Herbal ; pharmacology ; Elasticity ; drug effects ; Endothelial Cells ; cytology ; Female ; Humans ; Male ; Rats ; Serum ; Tumor Cells, Cultured ; Viscosity ; drug effects

Aim To observe the protective effect of glycine from myocardial cell injury of the isolated rat heart induced by endotoxin. Methods 21 male SD rats,weghting(250?30)g,were randomly divided into three groups:control group(n=7),endotoxin group(n=7),glycine/endotoxin group(n=7).Heart were isolated from the rats and perfused on Langendorff apparatus with Krebs-Henseleit(KH)buffer(Saturation 95%+5% CO_2)at a constant pressure(8.33 kPa)and temperture(37℃). The activities of lactate dehydrogenase(LDH),creatine kinase(CK),superoxide dismutase(SOD) and the level of malondialdehyde (MDA) of efflux from coronary artery, monophasic action potential(MAP)were determined at the certain time(0,20,50,80 min). Results Monophasic action potential were markedly improved in Gly/ET group. Glycine can attenuate the release of LDH,CK from myocardial cell. The activity of SOD and the level of MDA were close to control group. Conclusion Glycine can protect myocardial cells of the isolated rat heart from the damage induced by endotoxin.