[Objective] To observe analgesic action produced by electvoacupuncture (EA) of different intensity in adjuvant arthritis (AA) rats. [Methods] AA rat models were induced and the rats were randomized into 3 groups: group A, group B and group C. Group A and group B were treated with EA on points of Kunlun (BL60) and Yangtingquan (GB34) at the same wave type and wave frequency but at different electric current (3.5mA and 5.5mA respectively). Group C was performed with mimic EA. Pain threshold (PT) in the three groups before and after EA was observed. [Results] After EA, PT of the affected limb in group A and group B was increased (P0.05). [Conclusion] Analgesic action of EA at the same wave type and wave frequency while at different electric current is different: analgesic action at middle-intensity current is superior to that at large-intensity current; its possible mechanism is related to the participation of central nervous system.

Objective This study was aimed to investigate the effects of Ginger combined with Rhubarb on hyperuricemia in mice. Methods The mice hyperuricemic model was made by orally administering yeast extract, The mice were randomly divided into 7 groups,includinglow,middle and high dose of Ginger combined with Rhubarb group, Rhubarb group, and allopurinol group was given corresponding drugs respectively by gavage, and the uric acid (uA), creatinine (Cr), urea nitrogen (BUN) level in blood and XOD activity in liver were observed for all mice in each group. Results Compared to hyperuricaemia model control group,UA level and XOD activity in liver of mice of the three doses of Ginger combined with Rhubarb groups received dose-dependent decrease. Conclusion Ginger combined with Rhubarb can reduce UA level and XOD activity in liver in hyperuricaemia mice model.

OBJECTIVETo investigate the association of microcystin (MC) in drinking water with the incidence of colorectal cancer.

METHODSThe study was designed as a retrospective cohort. Eight townships or towns were randomly selected as the study sites in Haining City of Zhejiang Province, China. 408 cases of colon and rectum carcinomas diagnosed from 1977 to 1996 in the study sites were included, and a survey on types of drinking water of these patients was conducted. Samples of different water sources (well, tap, river and pond) were collected separately and microcystin concentrations were determined by indirect competitive ELISA method.

RESULTSThe incidence rate of colorectal cancer was significantly higher in population who drank river and pond water than those who drank well and tap water. Compared to well water, the relative risk (RR) for colorectal cancer was 1.88 (tap), 7.94 (river) and 7.70 (pond) respectively. The positive rate (> 50 pg/mL) of microcystin in samples of well, tap, river and pond water was 0, 0, 36.23% and 17.14% respectively. The concentration of microcystin in river and pond water was significantly higher than that in well and tap water (P < 0.01). Spearman rank correlation analysis showed that in the study sites, the microcystin concentration of river and pond water was positively associated with the incidence of colorectal cancer (rs = 0.881, P < 0.01).

CONCLUSIONSThe types of drinking water are positively associated with the incidence of colorectal cancer in the study sites, and this may be related to microcystin contamination of drinking water. Further biological study is needed to support the possible causative role of mycrocystin in carcinogenesis of colon and rectum.

Bacterial Toxins ; toxicity ; Carcinogens, Environmental ; toxicity ; China ; epidemiology ; Cohort Studies ; Colorectal Neoplasms ; chemically induced ; epidemiology ; Female ; Humans ; Male ; Microcystins ; Peptides, Cyclic ; toxicity ; Retrospective Studies ; Water ; chemistry ; Water Pollutants, Chemical ; toxicity ; Water Supply ; standards

OBJECTIVETo estimate the impact of copying on the indoor air quality, and to investigate whether ozone emitted during such a process induces pathological oxidative stress and potential oxidative damage in the bodies of operators.

METHODS67 copying operators (CO) and 67 healthy volunteers (HV) were enrolled in a random control study, in which levels of lipoperoxide (LPO) in plasma and erythrocytes, and levels of vitamin C (VC), vitamin E (VE) and beta-carotene (beta-CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in erythrocytes were determined by spectrophotometric methods.

RESULTSCompared with the HV group, the average values of LPO in plasma and erythrocytes in the CO group were significantly increased (P<0.0001), while those of VC, VE and beta-CAR in plasma as well as those of SOD, CAT and GPX in erythrocytes in the CO group were significantly decreased (P<0.0001). Pearson product-moment correlation analysis showed that with increase of ozone level in copying sites and duration of exposure to ozone, the values of LPO in plasma and erythrocytes in the bodies of operators were gradually increased,while those of VC, VE, beta-CAR, SOD, CAT and GPX were decreased in the same manner. Odds ratio (OR) of risk of biochemical parameters reflecting potential oxidative damage of the copying operators ranged from 4.440 to 13.516, and 95% CI of OR was from 2.113 to 34.061. Reliability coefficient (alpha) of the biochemical parameters used to reflect the potential oxidative damage of the operators was 0.8156, standardized item alpha=0.9929, P<0.0001.

CONCLUSIONFindings in the present study suggest that there exist a series of free radical chain reactions and pathological oxidative stress induced by high dose ozone in the operators, thereby causing potential oxidative and lipoperoxidative damages in their bodies.

Adult ; Copying Processes ; Erythrocytes ; Female ; Humans ; Male ; Occupational Exposure ; Odds Ratio ; Oxidants, Photochemical ; analysis ; toxicity ; Oxidative Stress ; Ozone ; analysis ; toxicity ; Risk Assessment

OBJECTIVETo study the abnormal reactions of a series of free radicals and the oxidative damages induced by free radical abnormal reactions in the bodies of patients with chronic glomerulonephritis.

METHODSEighty chronic glomerulonephritis patients (CGNP) and eighty healthy adult volunteers (HAV) were enrolled in a random control study, in which concentrations of nitric oxide (NO) in plasma, lipoperoxides (LPO) in plasma and in erythrocytes, and vitamin C (VC), vitamin E (VE) and beta-carotene (beta-CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in erythrocytes were determined with spectrophotometric assays.

RESULTSCompared with the average values of the above biochemical parameters in the HAV group, the average values of NO in plasma, and LPO in plasma and erythrocytes in the CGNP group were significantly increased (P = 0.0001), while those of VC, VE and beta-CAR in plasma as well as those of SOD, CAT and GPX in erythrocytes in the CGNP group were significantly decreased (P = 0.0001). Pearson product-moment correlation analysis showed that with increase of the concentration of blood creatinine as well as prolongation of the course of disease in the CGNP, the concentrations of NO in plasma, and LPO in plasma and erythrocytes in the CGNP increased gradually, while the concentrations of VC, VE and beta-CAR in plasma as well as the activities of SOD, CAT and GPX in erythrocytes in the CGNP decreased gradually (P = 0.002454-0.000001). The relative risk ratio (RR) of the above biochemical parameters reflecting oxidative damages in the bodies of CGNP ranged from 6.061 to 72.429. The reliability coefficient (alpha) that the above biochemical parameters were used to reflect the oxidative damages of the CGNP was 0.8137, standardized item alpha = 0.9728, Hotelling's T-Squared = 1135680.191, F = 53274.6478, P = 0.000001.

CONCLUSIONSThe findings in this study show that in the bodies of CGNP a series of free radical chain reactions result in severe pathological aggravation and induce oxidative damages in their bodies. Therefore, suitable dose of antioxidants should be supplemented to them so as to alleviate oxidative damages in their bodies.

Adult ; Antioxidants ; pharmacology ; therapeutic use ; Catalase ; pharmacology ; Chronic Disease ; Erythrocytes ; enzymology ; Female ; Free Radicals ; adverse effects ; Glomerulonephritis ; physiopathology ; Glutathione Peroxidase ; pharmacology ; Humans ; Lipid Peroxidation ; Male ; Nitric Oxide ; adverse effects ; analysis ; Oxidation-Reduction ; Oxidative Stress ; Superoxide Dismutase ; pharmacology

OBJECTIVETo study the relationship between abnormal reactions of free radicals in bodies of patients with acute organophosphorus pesticide poisoning (AOPP) and damages induced by free radicals.

METHODS58 AOPP patients and 58 healthy adult volunteers (HAV) were enrolled in an independent samples control design, in which spectrophotometric methods were used to determine the concentrations of nitric oxide (NO) and lipoperoxides (LPO) in plasma, and LPO in erythrocytes, vitamin C (VC), vitamin E (VE) and beta-carotene (beta-CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and acetylcholinesterase (AChE) in erythrocytes.

RESULTSCompared with the average values of every biochemical parameter in the HAV group, the average values of LPO in plasma and in erythrocytes, and NO in plasma in the AOPP group were significantly increased (P = 0.000001), while the average values of VC, VE, beta-CAR in plasma as well as SOD, CAT, GSH-Px and AChE in erythrocytes in the AOPP group were significantly decreased (P = 0.000001). The findings of Pearson product-moment correlation analysis between the value of AChE in erythrocytes and the values of above biochemical parameters for 58 AOPP patients showed that there was a significant linear negative correlation between AChE in erythrocytes and LPO, NO in plasma, and LPO in erythrocytes (P = 0.000001-0.001319), while there was a significant linear positive correlation between AChE in erythrocytes and VC, VE, beta-CAR in plasma as well as SOD, CAT, GSH-Px in erythrocytes (P = 0.000013-0.000824). The results of discriminant analysis of above chemical parameters for 58 AOPP patients and 58 HAV suggested that the correct rates of discriminant analysis were increased to 100% when the values of AChE and LPO in plasma and in erythrocytes, or AChE and others, were jointly used for the discriminant analysis.

CONCLUSIONThe findings of the present study suggest that a series of free radical reactions in AOPP patients' bodies are pathologically aggravated, and the discriminant analysis used the above biochemical parameters could markedly increase its correct rates for AOPP patients.

Acute Disease ; Adolescent ; Adult ; Female ; Free Radicals ; blood ; Humans ; Lipid Peroxides ; blood ; Male ; Nitric Oxide ; blood ; Organophosphate Poisoning ; Pesticides ; poisoning ; Poisoning ; blood

OBJECTIVETo explore the changes of vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF) and angiogenesis, and the effects of bFGF, angiotensin converting enzyme inhibiter(ACEI) benazepril on the angiogenesis in acute myocardial infarction (AMI) model of rabbits, and to provide a probable evidence for the treatment of AMI.

METHODSAMI model was established by ligating anterior descending branch of coronary artery of Japan-Sino hybridization white rabbits. The postoperative rabbits were randomly divided into 6 groups and each group was treated with different drugs. Groups 1 and 2 were treated with normal saline (NS) for 28 and 14 days (d), group 3 and 4 with bFGF for 28 and 14 d, groups 5 with benazepril for 14 d, and group 6 with benazepril and bFGF for 14 d respectively. The rabbits were killed on the 14th or 28th d and their hearts were excised, sectioned and stained with HE, Masson trichrome to observe VEGF, bFGF and CD(34) under a microscope, which were quantified with a computer-assisted morphometry.

RESULTSCompared with group 1, the granulation tissue of infarction zone (IZ) in group 2 freshened up, and the capillary density (CD) in IZ was increased (P = 0.002). The CD in the IZ as well as VEGF and bFGF in groups 3 and 4 were increased respectively (P = 0.011-0.037). In group 5 the changes of VEGF and bFGF were not found in the IZ and the border zone (BZ) while CD was significantly increased (35.4% and 25.6%, P = 0.036 and 0.037). Compared with group 2, the CD in the IZ and BZ of group 6 was significantly increased (63.4% and 44.3% P = 0.007 and 0.007), meanwhile VEGF and bFGF were increased. Compared with group 5, only VEGF was increased.

CONCLUSIONIntravenous bFGF may increase VEGF and bFGF significantly, thus promoting the angiogenesis in the IZ and BZ in cardiac infarction as VEGF and bFGF are the potent angiogenic growth factors. Benazepril may promote angiogenesis in the IZ and BZ in cardiac infarction, but its mechanism is irrelative to the expression of VEGF and bFGF. The combination of benazepril and bFGF may promote, to some extent, the expression of VEGF and bFGF, but their effect on angiogenesis has not been found.

Angiotensin-Converting Enzyme Inhibitors ; pharmacology ; Animals ; Benzazepines ; metabolism ; pharmacology ; therapeutic use ; Coronary Circulation ; drug effects ; Coronary Vessels ; drug effects ; metabolism ; Disease Models, Animal ; Fibroblast Growth Factor 2 ; metabolism ; therapeutic use ; Myocardial Infarction ; metabolism ; Neovascularization, Physiologic ; Rabbits ; Time Factors ; Vascular Endothelial Growth Factor A ; metabolism ; therapeutic use

Objective:To observe the changing characteristics of pharmacokinetic and pharmacodynamic (PK-PD) parameters of vancomycin in critical patients under different drug regimens and to further explore the influencing factors.Methods:The clinical data of patients who treated with vancomycin and recorded by steady-state through concentration (C min) admitted to intensive care unit (ICU) of Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine from January 2011 to December 2018 were analyzed retrospectively. The patients were divided into three groups according to the dosing interval (groups of q12 h, q8 h and q6 h respectively) and C min was collected. The serum concentration of vancomycin before (0 hour) and 1, 2, 4, 6, 8, 12 and 24 hours after administration were estimated by JPKD Ver 3.1. Area under the curve (AUC 0-24 h) was estimated by trapezoidal area method. Minimum inhibitory concentration (MIC) of pathogenic microorganisms in the same period was retrieved, thus AUC 0-24 h/MIC was calculated. Results:285 patients with 529 records of C min were enrolled in the study, including 375 data in q12 h group, 121 data in q8 h group and 33 data in q6 h group. After unifying daily dose by JPKD Ver 3.1, the C min (10-20 mg/L) reaching rate of q12 h group, q8 h group, q6 h group were 35.7%, 43.8% and 60.6%, respectively, while only q12 h group was statistically significant compared with q6 h group ( P < 0.01). q6 h group and q8 h group showed higher C min than q12 h group (mg/L: 13.8±5.2, 13.5±7.3 vs. 11.4±7.9, both P < 0.05) and lower peak concentration (C max) than q12 h group (mg/L: 19.4±5.3, 21.5±7.3 vs. 23.9±8.1, both P < 0.05). However, there was no significant difference in terms of percentage of PD target (AUC 0-24 h/MIC≥400) among the three groups (q12 h group, q8 h group, q6 h group were 38.1%, 41.3%, 45.5%, P > 0.05). Multiple linear regression analysis showed that creatinine clearance (CCr) and vancomycin clearance (CLvancomycin) were the main influencing factors of vancomycin PD parameters such as C min and AUC 0-24 h/MIC ( r values of CCr were -0.391, -0.424, and rvalues of CLvancomycin were -0.673, -0.663, all P < 0.01), and were negatively correlated with age ( r values were -0.432 and -0.488, respectively, both P < 0.01). Conclusions:At the same daily dose, C min can be increased and C max can be decreased by increasing the frequency of vancomycin administration, thus minimize the fluctuation of vancomycin serum concentration, but AUC 0-24 h/MIC is not affected. Vancomycin administration regimen in severe patients should be optimized according to CCr, CLvancomycin and age.

OBJECTIVETo investigate whether 3,4-methylenedioxymethamphetamine (MDMA) abuse produces another neurotoxicity which may significantly inhibit the acetylcholinesterase activity and result in severe oxidative damage and liperoxidative damage to MDMA abusers.

METHODS120 MDMA abusers (MA) and 120 healthy volunteers (HV) were enrolled in an independent sample control design, in which the levels of lipoperoxide (LPO) in plasma and erythrocytes as well as the activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and acetylcholinesterase (AChE) in erythrocytes were determined by spectrophotometric methods.

RESULTSCompared with the average values of biochemical parameters in the HV group, those of LPO in plasma and erythrocytes in the MA group were significantly increased (P < 0.0001), while those of SOD, CAT, GPX and AChE in erythrocytes in the MA group were significantly decreased (P < 0.0001). The Pearson product-moment correlation analysis between the values of AChE and biochemical parameters in 120 MDMA abusers showed that significant linear negative correlation was present between the activity of AChE and the levels of LPO in plasma and erythrocytes (P < 0.0005-0.0001), while significant linear positive correlation was observed between the activity of AchE and the activities of SOD, CAT and GPX (P < 0.0001). The reliability analysis for the above biochemical parameters reflecting oxidative and lipoperoxidative damages in MDMA abusers suggested that the reliability coefficient (alpha) was 0.8124, and that the standardized item alpha was 0.9453.

CONCLUSIONThe findings in the present study suggest that MDMA abuse can induce another neurotoxicity that significantly inhibits acetylcholinesterase activity and aggravates a series of free radical chain reactions and oxidative stress in the bodies of MDMA abusers, thereby resulting in severe neural, oxidative and lipoperoxidative damages in MDMA abusers.

Acetylcholinesterase ; metabolism ; Adolescent ; Adult ; Amphetamine-Related Disorders ; blood ; enzymology ; metabolism ; Catalase ; blood ; Cholinesterase Inhibitors ; adverse effects ; urine ; Erythrocytes ; enzymology ; Female ; Humans ; Lipid Peroxidation ; drug effects ; Lipid Peroxides ; blood ; Male ; N-Methyl-3,4-methylenedioxyamphetamine ; adverse effects ; urine ; Oxidative Stress ; drug effects ; Superoxide Dismutase ; blood

AIMTo investigate whether chronic bacterial prostatitis might increase oxidative stress and oxidative damage in chronic bacterial prostatitis patients (CBPP), and to explore its possible mechanism.

METHODSEnrolled in a case-control study were 70 randomly sampled CBPP and 70 randomly sampled healthy adult volunteers (HAV), on whom plasma nitric oxide (NO), vitamin C (VC), vitamin E (VE) and beta-carotene (beta-CAR) level, erythrocyte malondialdehyde (MDA) level, as well as erythrocyte superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) activities were determined by spectrophotometry.

RESULTSCompared with the HAV group, values of plasma NO and erythrocyte MDA in the CBPP group were significantly increased (P < 0.001); those of plasma VC, VE and beta-CAR as well as erythrocyte SOD, CAT and GPX activities in the CBPP group were significantly decreased (P < 0.001). Findings from partial correlation for the 70 CBPP showed that with prolonged course of disease, values of NO and MDA were gradually increased (P < 0.001), and those of VC, VE, beta-CAR, SOD, CAT and GPX were gradually decreased (P < 0.05-0.001). The findings from stepwise regression for the 70 CBPP suggested that the model was Y = -13.2077 + 0.1894MDA + 0.0415NO - 0.1999GPX, F = 18.2047, P < 0.001, r = 0.6729, P < 0.001.

CONCLUSIONThe findings suggest that there exist increased oxidative stress and oxidative damage induced by chronic bacterial prostatitis in the patients, and such phenomenon was closely related to the course of disease.

Adult ; Ascorbic Acid ; blood ; Bacterial Infections ; blood ; physiopathology ; Case-Control Studies ; Catalase ; blood ; Erythrocytes ; metabolism ; Glutathione Peroxidase ; blood ; Humans ; Male ; Malondialdehyde ; blood ; Nitric Oxide ; blood ; Oxidative Stress ; physiology ; Prostatitis ; blood ; microbiology ; physiopathology ; Reference Values ; Superoxide Dismutase ; blood ; Vitamin E ; blood ; beta Carotene ; blood