Objective To investigate the relationship between refractory hypertension and renal hemodynamics in end stage renal diseases (ESRD) patients.Methods ESRD patients were classified into:patients with refractory hypertension (group A) and patients with normal blood pressure(group B).Renal hemodynamic indices were ex- amined by duplex ultrasonography.Fasting serum lipid (TC,TG,HDL-C,LDL-C,Lp(a),ox-LDL) and serum parathyroid hormane (PTH) were determined in all patients.Results Significant differences were found in renal hemodynamic indices such as peak systolic velocity (PSV),mean flow velocity (MV),pulsatility index (PI),renal- aortic ratio (RAR) and in clinical index such as Lp(a) and ox-LDL between the two group.Refractory hyperten- sion patients had lower renal hemodynamic indices and higher Lp(a) and ox-LDL levels than in patients with con- trolled BP.Logistic regression analysis revealed that refractory hypertension was related with PSV,EDV,Pl and RAR,but not relevant with sex,age,dialysis time,hematocrit,BUN,creatinine,TC,TG,HDL-C,LDL-C, PTH,MV and RI.Conclusion Atherosclerotic renal artery stenosis and severe disorder in renal hemodynamics is likely the cause for refractory hypertention in ESRD patients.The rise of serum Lp(a) and ox-LDL might acceler- ate renal artery atherosclerosis.

OBJECTIVETo study the effect of electro-acupuncture (EA) at points along Foot Yangming Channel on metabolite of ulcerative colitis (UC) rats' cerebral cortex and to identify key metabolites by referring to Pi/Wei-brain related theory in Chinese medicine (CM).

METHODSThe UC rat model was set up by dextran sulfate sodium (DSS) method. Male SD rats were randomly divided into the model group and the EA group, 13 in each group. Another 13 rats were recruited as the blank control group. Rats in the blank control group and the model group received no EA. EA was performed at Zusanli (ST36), Shangjuxu (ST37), and Tianshu (ST25) for 5 days by using disperse-dense wave. Then all rats were sacrificed. Their recto-colon and the ileocecal junction were pathomorphologically observed by light microscope and transmission electron microscope (TEM). Cerebral cortexes were extracted. Water-soluble and lipid-soluble brain tissue metabolites were respectively extracted for metabolic research using 1H nuclear magnetic resonance (1H-NMR).

RESULTSEA could obviously improve the general condition of UC model rats, decrease the value of DAI, reduce the infiltration of inflammatory cells in the intestinal tract, stabilize structures such as mitochondria, endoplasmic reticulum and so on (P <0.05). 1HNMR analysis showed that in the model group, contents of glutamic acid, cholesterol, very low density lipoproein (VLDL) in the pallium obviously decreased, while alanine and low density lipoprotein (LDL) significantly increased. After EA, levels of lactic acid, glutamic acid, total cholesterol (TC), and VLDL all increased, and levels of alanine and LDL decreased. All indices were approximate to those of the blank control group.

CONCLUSIONEA at Foot Yangming channel was found to have some effect on metabolites in the brain tissue of UC model rats, which had specific metabonomic material basis and mechanism based on the Pi/Wei-brain related theory.

Acupuncture Points ; Animals ; Cerebral Cortex ; metabolism ; Colitis, Ulcerative ; Electroacupuncture ; Lipids ; Male ; Rats, Sprague-Dawley

OBJECTIVETo express soluble HA of A/H1N1 influenza virus in drosophila S2 cell line and identify its bio-activity.

METHODSHA gene was amplified from A/Shenzhen/71/09 virus strain using RT-PCR, then we constructed pAC5.1-HA expression vector, which was co-transfected into S2 cell with pCoblast vector. After transfection, stable S2 cell was selected through Blasticindin. HA in the supernatant was identified with Western Blot assay and purified with Ni-column. Recombinant HA was immunized into BALB/c mice 3 times, and the Abs titers were evaluated with ELISA.

RESULTSWe successfully cloned HA gene with 1.7 x 10(3) bp of A/Shenzhen/71/09 virus strain and got recombinant pAC5. 1-HA expression vector. Stable S2 cell line was established after transfection and selection, which continuously expressed HA with molecular weight 75 x 10(3) D. After immunization with HA, the Abs titers were 1:1280 and 1: 5120 respectively on 10 d, 30 d.

CONCLUSIONWe expressed soluble HA with good bio-activity, which contributed to research on immune diagnosis, subunit vaccine, and monoclonal Abs for influenza.

Animals ; Blotting, Western ; Cell Line ; Drosophila ; Female ; Gene Expression ; Hemagglutinin Glycoproteins, Influenza Virus ; analysis ; chemistry ; genetics ; metabolism ; Humans ; Influenza A Virus, H1N1 Subtype ; genetics ; metabolism ; Influenza, Human ; virology ; Mice ; Mice, Inbred BALB C ; Solubility

OBJECTIVETo investigate the impact of sub-chronic Aluminium-maltolate [Al(mal)3] exposure on the catabolism of amyloid precursor protein (APP) in rats.

METHODSForty adult male Sprague-Dawley (SD) rats were randomly divided into five groups: the control group, the maltolate group (7.56 mg/kg BW), and the Al(mal)3 groups (0.27, 0.54, and 1.08 mg/kg BW, respectively). Control rats were administered with 0.9% normal saline through intraperitoneal (i.p.) injection. Maltolate and Al(mal)3 were administered to the rats also through i.p. injections. Administration was conducted daily for two months. Rat neural behavior was examined using open field tests (OFT). And the protein expressions and their mRNAs transcription related with APP catabolism were studied using enzyme-linked immunosorbent assay (ELISA) and real-time polymerase chain reaction (RT-PCR).

RESULTSThe expressions of APP, β-site APP cleaving enzyme 1 (BACE1) and presenilin-1 (PS1) proteins and their mRNAs transcription increased gradually with the increase of Al(mal)3 doses (P<0.05). The enzyme activity of BACE1 in the 0.54 and 1.08 mg/kg Al(mal)3 groups increased significantly (P<0.05). The expression of β-amyloid protein (Aβ) 1-40 gradually decreased while the protein expression of Aβ1-42 increased gradually with the increase of Al(mal)3 doses (P<0.05).

CONCLUSIONResult from our study suggested that one of the possible mechanisms that Al(mal)3 can cause neurotoxicity is that Al(mal)3 can increase the generation of Aβ1-42 by facilitating the expressions of APP, β-, and γ-secretase.

Amyloidogenic Proteins ; genetics ; metabolism ; Animals ; Drug Administration Schedule ; Environmental Pollutants ; administration & dosage ; toxicity ; Gene Expression Regulation ; drug effects ; Male ; Organometallic Compounds ; administration & dosage ; toxicity ; Pyrones ; administration & dosage ; toxicity ; Random Allocation ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo assess the methodological quality of clinical research on Chinese medicine (CM) applied by intra-arterial infusion in treating primary liver cancer (PLC).

METHODSCochrane Central Register of Controlled Trials (CENTRAL), PubMed, and three Chinese databases, including Chinese BioMedical Database (CBM), China National Knowledge Infrastructure (CNKI) and China Academic Journal (VIP) were searched. Chinese articles were also searched manually in 16 journals. Two reviewers independently selected studies, the quality of literatures were assessed according to the Cochrane Collaboration method of quality assessment.

RESULTSA total of 14 articles met the inclusion criteria for this review. Only three of these articles described the randomization method used. None of the studies was blinded. All of the articles didn't report the calculation of the sample size. Only six studies mentioned adverse reactions. All of the studies were of grade C according to the Cochrane Collaboration method. Six studies reported results of survival, and only two of these reported better efficacy in the treatment groups.

CONCLUSIONSThe quality of studies concerned intra-arterial infusion of CM in treating with PLC was poor and the exact effect of these medicines still need evaluation. Well designed RCTs with large sample sizes, adequate follow-up data and reliable methods of assessment are needed to better appraise the real effect of CMs in the treatment of PLC patients.

Biomedical Research ; standards ; Evidence-Based Medicine ; Humans ; Infusions, Intra-Arterial ; Liver Neoplasms ; therapy ; Medicine, Chinese Traditional ; Research Design

In the present study, changes of the neuronal activity of 5-hydroxytrypamine (5-HT) neurons of dorsal raphe nucleus(DRN) in a rat model of Parkinson's disease (PD) were investigated with glass microelectrode recording. The results showed that the discharge rates of 5-HT neurons in control and PD rats were (1.61+/-0.56) Hz and (2.61+/-1.97) Hz, respectively. The discharge rate of PD rats was significantly increased when compared to that of the control rats. In control rats, 79% of 5-HT neurons discharged regularly and 21% in bursts. In PD rats, however, 36% of 5-HT neurons discharged regularly, 16% irregularly and 47% in bursts. The percentage of 5-HT neurons discharging in bursts was obviously higher than that of the control rats (P<0.05). The data suggest that the discharge rate and bursting pattern of 5-HT neurons in DRN are increased in a rat model of Parkinson's disease.
Animals ; Electrophysiology ; Male ; Microelectrodes ; Neurons ; physiology ; Parkinson Disease ; physiopathology ; Raphe Nuclei ; metabolism ; physiopathology ; Rats ; Rats, Sprague-Dawley ; Serotonin ; metabolism

OBJECTIVETo evaluate the impact of specific siRNA on survivin gene in transfected leukemia cells.

METHODThe small interfering RNA (siRNA) targeted survivin mRNA was synthesized in vitro and was transfected into K562 cell by Hiperfect into human leukemia cell line K562, which has high survivin expression level. The level of survivin mRNA expression was determined by quantitative reverse transcription polymerase chain reaction (RT-PCR) with SYBR GREEN I. The apoptosis index of cytotrophoblasts were determined and analyzed by FCM (Annexin V-FITC/PI staining methods). The cell proliferation was examined by MTT at 48 h and 72 h after transfection.

RESULTThe level of mRNA expression was significantly inhibited by the siRNA 48 h and 72 h after transfection, the suppression rate of survivin mRNA separately reached 85.21%, 94.35% mensurated by quantitative RT-PCR with SYBR GREEN I, cell proliferation was inhibited significantly by 45.02% and 50.88%, respectively, the apoptotic rate detected by Annexin V-FITC assay reached 12.28%and 21.55%, respectively.

CONCLUSIONThe chemosynthesized siRNA targeting survivin could significantly down-regulate survivin mRNA. Survivin siRNA was able to inhibit the proliferation of leukemia cell line K562. Survivin may become a new target for leukemia gene therapy.

Apoptosis ; drug effects ; Cell Proliferation ; drug effects ; Gene Silencing ; Humans ; Inhibitor of Apoptosis Proteins ; genetics ; K562 Cells ; RNA, Small Interfering ; pharmacology ; Transfection

AIMTo assess the effects of the alpha-glucosidase inhibitor Sangzhi (Ramulus mori, SZ) on the relief of diabetic symptoms of hyperglycemia and the prevention of its late complications in alloxan diabetic rats with high-calorie chow.

METHODSThe aqueous extract of Sangzhi was given orally to alloxan diabetic rats for 15 days. The hyperglycemic symptoms were observed. The blood glucose, lipid levels and the nephrotic representations were measured.

RESULTSWhen alloxan diabetic rats on high-calorie chow were treated with SZ, the hyperglycemic symptoms were improved, the blood lipid levels were improved, the ratio of kidney over body weight and the blood N-acetyl-beta-D-glucosaminidase (NAG) activity were lowered. The degree of renal pathological changes was significantly reduced.

CONCLUSIONSZ may be useful for treating diabetes and its complications.

Acetylglucosaminidase ; blood ; Animals ; Blood Glucose ; metabolism ; Diabetes Mellitus, Experimental ; complications ; drug therapy ; metabolism ; Diabetic Nephropathies ; etiology ; metabolism ; prevention & control ; Disease Models, Animal ; Enzyme Inhibitors ; therapeutic use ; Glycoside Hydrolase Inhibitors ; Hypoglycemic Agents ; isolation & purification ; pharmacology ; therapeutic use ; Kidney ; pathology ; Male ; Morus ; chemistry ; Plants, Medicinal ; chemistry ; Rats ; Rats, Wistar ; Triglycerides ; blood ; alpha-Glucosidases ; isolation & purification

In vivo extracellular recordings were made in the subthalamic nucleus (STN) of intact control rats and rats with 5,7-dihydroxytryptamine (5,7-DHT) -produced lesion of dorsal raphe nucleus (DRN). The results showed that the firing rate of STN neurons in control rats and DRN-lesioned rats were (6.93+/-6.55) Hz and (11.27+/-9.31) Hz, respectively, and the firing rate of DRN-lesioned rats significantly increased when compared to the control rats (P<0.01). In control rats, 13% of STN neurons discharged regularly, 46% irregularly and 41% in bursts. In DRN-lesioned rats, 9% of STN neurons discharged regularly, 14% irregularly and 77% in bursts, the percentage of STN neurons firing in bursts was obviously higher than that of the control rats (P<0.01). In addition, the mean interspike interval coefficient of variation of STN neurons in control rats and DRN-lesioned rats were (0.05+/-0.04) and (0.11+/-0.09), respectively. The mean interspike interval coefficient of variation of DRN-lesioned rats was significantly higher than that of the control rats (P<0.001). These results show that the firing rate and the bursting pattern rate of neurons in STN of DRN-lesioned rats increase significantly, suggesting that DRN inhibits the neuronal activity of the subthalamic neurons in the intact rat.
5,7-Dihydroxytryptamine ; pharmacology ; Adrenergic Agents ; pharmacology ; Animals ; Electrophysiological Phenomena ; Male ; Neurons ; physiology ; Random Allocation ; Raphe Nuclei ; drug effects ; pathology ; Rats ; Rats, Sprague-Dawley ; Subthalamic Nucleus ; physiopathology

To investigate the changes in bcl-2, bax expression and neuron apoptosis in the hippocampus after the blockade of cervical lymphatics, the model of lymphostatic encephalopathy was established by occluding and removing both the superficial and deep cervical lymph nodes in rats. The animals were sacrificed at 1, 2, 3, 5, 7 and 14 d after operation. H and E staining was used to observe the structure of brain tissues and TUNEL staining was used to detect in situ cell apoptosis in the hippocampus. The expression of bcl-2 and bax in the hippocampus were examined by RT-PCR. The results showed that cerebroedema appeared at day 2 and was most serious at day 5 after the blockade of cervical lymphatics. The number of TUNEL positive cells began to increase at day 2 and reached the maximum at day 5. The expression of bax began to increase at day 1 and reached the maximum at day 2. The expression of bcl-2 began to decrease at day 1 and dropped to the minimum at day 5. The items mentioned above recovered to control level at day 14. These results suggest that lymphostatic encephalopathy following the blockade of cervical lymphatics result in changes in bcl-2 and bax expression in the hippocampus and that apoptosis is the main form of neuron death.
Animals ; Apoptosis ; physiology ; Female ; Hippocampus ; metabolism ; pathology ; Lymph Node Excision ; Lymphatic System ; physiology ; Male ; Neck ; Neurons ; cytology ; Proto-Oncogene Proteins c-bcl-2 ; genetics ; metabolism ; Random Allocation ; Rats ; Rats, Wistar ; bcl-2-Associated X Protein ; genetics ; metabolism