Adult ; Aged ; Aged, 80 and over ; Drugs, Chinese Herbal ; therapeutic use ; Esophageal Neoplasms ; radiotherapy ; Female ; Humans ; Lung Neoplasms ; radiotherapy ; Male ; Middle Aged ; Phytotherapy ; Radiation Pneumonitis ; drug therapy

Objective To evaluate the protective value of cardioplegia solution plus metformin in different cardiac arrest time and concentration of metformin in isolated rat hearts .Methods There were 36 male Sprague–Dawley rats divided into six groups randomly, according to the duration of cardioplegic arrest(30 min or 60min) and the concentrations of metformin(50μmol/L or 100 μmol/L) .Langendorff-perfused Sprague-Dawley rat hearts were perfused for 20 minutes with Krebs-Henseleit buffer followed by 30 or 60 minutes of crystalloid cardioplegia or plus metformin (50 or 100 μmol/L) and 60 minutes of reperfu-sion.The left ventricular performance was recorded at 5 time points.The expressions of AMPKαand phosphorylation of AMPKαwere detected by western Blot.The changes of myocardial mitochondria were observed under transmission electron mi-croscope.Results There were no significant differences in Con(A), 50(A) and 100(A) groups in LVDP, ±dp/dtmax and HR.Compared with Con(B) group subjected to 60 minutes of ischemia followed by 60 minutes of reperfusion, the 100(B) group significantly improved myocardial performance , and the ratio of p-AMPKα/AMPKαwas the highest in all 6 groups.The structure of myocardial mitochondria in 100(B) group was better protected than that of Con(B) group.Conclusion These findings suggested that the left ventricular performance was protected in rat heart perfused by cardioplegia plus 100 μmol/L after 60 minutes cardioplegic arrest .The mechanism may be the activation of AMPK and the protection of structures of myocardial mitochondria.

Objective To investigate the hypoglycemic effects of Laminaria japonica (L. japonica) on diabetic model induced by alloxan in rats. Methods Sixty healthy female rats were used to establish diabetic models by injecting alloxan peritoneally, and L.japonica was applied as raw materials for potential marine drugs.The levels of fasting blood glucose (FBG) were detected by automatic blood glucose device. Enzyme linkedimmunoabsorbant assay was applied to determine the insulin level in serum. The shape and structure of isletcells were observed with histopathological staining, and the expression of superoxide dismutase (SOD) and inducible nitric oxide synthase (iNOS) in islet cells were detected by immunohistochemical technique. Results After the treatment, the levels of FBG of L.japonica treated group B [(9.37±1.70) mmol/LandC (9.18±1.65 ) mmol/L, F= 32.81, q=6.35～11.72, P<0.05 ] reduced, while the serum levels of insulin in treated group A, Band C (0.0378±0.0026, 0.0378±0.0027, 0.0367±0.0035) increased(F= 11.40, q=4.28～8.47, P<0.05) significantly than those of diabetic model group (0.0456 ±0.0057) . The shape and structure of islet cells improved with the up-expressing SOD(t=4.73～4.76, P<0.05)and down-expressing iNOS (t=4.81～5.30, P<0.05) in L.japonica treated group B and C than those in diabetic model group. Conclusion L.japonica might decrease the serum level of FBG through promoting the islet cell recovery by an anti-oxide effect.

Objective To evaluate the impact of depression on 5-year survival rate of elderly patients with chronic obstructive pulmonary disease (COPD).Methods From January 2002 to June 2004, a total of 401 elderly inpatients with COPD were enrolled.They were assigned into two groups according to their HAD-D scores: depression group (HAD-D scores≥8) and non-depression group (HAD-D scores<8).The follow-up time was 5 years.Results The 5-year survival rate was lower in depression group than in non-depression group (log-rank test, χ~2 = 6.94, P<0.01).Depression was independently associated with mortality in elderly patients with COPD (HR: 1.84, 95% CI: 1.08 to 3.11).Conclusions Depression in elderly COPD patients is associated with poor 5-year survival rate, and it is an independent influencing factor of 5-year mortality.

Carcinoma, Hepatocellular ; pathology ; virology ; Cisplatin ; pharmacology ; Drug Synergism ; Flavonoids ; pharmacology ; Humans ; Liver Neoplasms ; pathology ; virology ; Trans-Activators ; Tumor Cells, Cultured ; Viral Regulatory and Accessory Proteins ; drug effects

OBJECTIVEHigh altitue pulmonary edema (HAPE) impacts seriously people's health at high altitude. Screening of susceptibility genes for HAPE will be used for the evaluation and protection of susceptible people.

METHODSWe performed a genome-wide association study (GWAS) using Affymetrix SNP array 6.0 in 23 HAPE patients and 17 healthy controls. GO and Pathway analysis softwares were used to analyze and draw gene network.

RESULTSThirty-nine SNPs were found to be significantly different between case and control groups (P < 10(-4)). GO and Pathway analysis of 27 genes around the 39 SNPs indicated that these genes mainly participate in the regulating of cell proliferation, regulation of nitrogen compound metabolic process and G-protein coupled receptor protein signaling pathway and so on.

CONCLUSIONIt suggests that these SNPs and genes found in this study may be associated with the susceptibility of HAPE.

Adult ; Altitude Sickness ; genetics ; Asian Continental Ancestry Group ; genetics ; Case-Control Studies ; Genetic Predisposition to Disease ; Genome-Wide Association Study ; Humans ; Hypertension, Pulmonary ; genetics ; Polymorphism, Single Nucleotide ; Young Adult

Aim To explore the effects of niacin on LDL-C uptake and metabolism in HepG2 cells,and to clarify the functions of niacin in lipid-lowering and slo-wing the atherosclerosis process,thus to provide a sci-entific basis for niacin as a lipid-lowering drug in clini-cal development.Methods Oil red O staining was used to observe HepG2 cells after lipid uptake.Enzy-matic method was used to determine the content of in-tracellular free cholesterol (FC)and total cholesterol (TC).The LDLR levels on the surface of cell mem-brane were detected by immunofluorescence flow cy-tometer.The mRNA and protein expressions of LDLR, SREBP2 and PCSK9 were analyzed by qPCR and Western blot.Results The results of oil red O staining showed that the rate of oil red O-positive cells and the number of red lipid droplets were significantly in-creased in niacin group than control group.Niacin sig-nificantly increased the levels of TC and FC in HepG2 cells(P <0.05 ).What’s more,niacin significantly upregulated the expression of LDLR and significantly downregulated the protein expression of PCSK9,while it had no effect on the expression of SREBP2.Conclu-sion Niacin accelerates LDL-C uptake probably via downregulating the expression of PCSK9 and reducing the degradation of LDLR protein in HepG2 cells.

OBJECTIVETo observe the effect of acupuncture at the whole points of Hand Jueyin pericardium meridian on the amplitude of low frequency fluctuations (ALFF) of healthy people in resting state (R1) functional magnetic resonance imaging (fMRI).

METHODSTotally 16 healthy subjects received structure scan of T1 and T2. Then two fMRI scans were conducted for each participant. fMRI included the resting-state scan (R1; the scanning time was 8 min 6 s), the stimulating-acupoint scan (AP; the scanning time was 8 min 6 s). fMRI data acquisition from structure scanning and function scanning were processed with format conversion and statistical analysis.

RESULTSUnder R1 state, brain regions with activated ALFF signals included bilateral superior frontal gyrus, medial frontal gyrus, middle occipital gyrus, precuneus, superior temporal gyrus, and cingulate gyrus. Under the AP state, brain regions with activated ALFF signals were bilateral superior frontal gyrus, medial frontal gyrus, middle temporal gyrus, left fusiform gyrus, precuneus, posterior cingulate, and declivis. Compared with R1 state, obvious difference of ALFF signal areas of the brain caused by acupuncture at pericardium were: bilateral cuneus, precuneus, left posterior cingulate gyrus, right middle occipital gyrus, and right occipital lingual gyrus.

CONCLUSIONAcupuncture at the whole points of Hand Jueyin pericardium meridian could significantly change inherent activity states of the cerebral cortex, especially in bilateral superior frontal gyrus, medial frontal gyrus, and precuneus.

Acupuncture ; Acupuncture Points ; Brain ; physiology ; Brain Mapping ; Frontal Lobe ; Humans ; Magnetic Resonance Imaging ; methods ; Pericardium

OBJECTIVEHigh altitude pulmonary edema (HAPE), a life-threatening disease, has no biological markers used for the routine prevention, diagnosis and treatment. The aim of this study was to identify serum proteins differentially expressed in patients with HAPE for discovering essential biomarkers.

METHODSA complete serum proteomic analysis was performed on 10 HAPE patients and on 10 high altitude and 11 sea level healthy people as control using two-dimensional gel electrophoresis, followed by matrix-assisted laser desorption/ionization mass spectrometry and peptide mass fingerprinting. Finally, two most significantly changed proteins were validated by enzyme-linked immunosorbent assay (ELISA).

RESULTSEight protein spots stained with differential intensity, respresenting 5 distinct proteins were identified in patients compared with healthy controls through analysis of these composite gels. Among them, four proteins, namely alpha 1-antitrypsin(alpha1-AT), Haptoglobin(Hp), apolipoprotein A-1 (apoA-1) and Complement C3 increased remarkably, while one protein, apolipoprotein A-IV (apoA-IV) decreased significantly. The variation of alpha1-AT and Haptoglobin, as detected by ELISA, was consistent with the results from proteomic analysis.

CONCLUSIONSIt is well known that Hp, alpha1-AT and complement C3 are associated with inflammation and apoA-1 and apoA-IV play important roles in lipid absorption, transport and metabolism. Therefore, the significant expression changes of Hp, alpha1-AT and complement C3 and apoA-1 and apoA-IV between HAPE patients and their corresponding healthy controls highlight the role of inflammatory response system and lipid metabolism system in the pathophysiology of HAPE.

Altitude ; Biomarkers ; blood ; Blood Proteins ; metabolism ; Case-Control Studies ; Electrophoresis, Gel, Two-Dimensional ; Enzyme-Linked Immunosorbent Assay ; Humans ; Peptide Mapping ; Proteome ; Pulmonary Edema ; blood ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization

OBJECTIVETo study the effects of iptakalim (Ipt), an ATP-sensitive potassium channel opener, on cardiac remodeling induced by isoproterenol (ISO) in Wistar rats.

METHODSISO was given subcutaneously (85 mg/(kg x d), sc, 7 days) to induce cardiac remodeling in rats. The rats in Ipt treated group were administrated with Ipt 3 mg/kg (po) after ISO injection. After treated with Ipt for 6 weeks, the hemodynamic parameters were tested by an eight channel physiological recorder (RM-6000). Then the heart weight was weighed and the cardiac remodeling index was calculated. HE stain and Masson's stain were employed to perform histological analysis, the hydroxyproline(Hyp) content in cardiac tissue was detected by colorimetric method, radioimmunoassay was used to measure the plasma levels of endothelin-1 (ET-1) and prostacyclin (PGI2).

RESULTSSix weeks after ISO injection, the cardiac functions of model group were damaged markedly compared with those of normal group. The characteristics of ventricular remodeling in model group included that the heart weight index, myocyte cross-sectional area, myocardial fibrosis, and the hydroxyproline content in cardiac tissue were all increased significantly. The plasma level of ET-1 was increased, while the plasma level of PGI2 was decreased significantly. These changes could be reversed by Ipt treatment (3 mg/(kg x d) for 6 weeks).

CONCLUSIONIpt can reverse cardiac remodeling induced by isoproterenol in rats. The endothelial protective effect regulating effects of Ipt on the balance between the ET-1 and PGI2 system may be involved in its mechanisms.

Animals ; Endothelin-1 ; blood ; Hemodynamics ; Hydroxyproline ; metabolism ; Isoproterenol ; pharmacology ; KATP Channels ; drug effects ; Male ; Myocardium ; metabolism ; Propylamines ; pharmacology ; Prostaglandins I ; blood ; Rats ; Rats, Wistar ; Ventricular Remodeling ; drug effects