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Late protective effects of the anticalmodulin drug fluphenazine on carbon tetrachloride-induced liver necrosis.

E C de FERREYRA ; A S BERNACCHI ; M F San MARTIN ; G D CASTRO ; J A CASTRO

Biomedical and Environmental Sciences.1995;8(3):218-225.

Fluphenazine (FP) treatment (50 mg/kg bw, ip in saline) 30 min before or 6 or 10 h after CCl4 administration (1 ml/kg ip in olive oil) significantly prevented the liver necrosis produced by the hepatotoxin at 24 h. FP had enhancing effects on the covalent binding of CCl4 reactive metabolites to cellular constituents and on CCl4 induced lipid peroxidation. FP lowered body temperature of the CCl4-poisoned animals during the 24 h observation period. The obtained results are compatible but do not prove the hypothesis that calmodulin (CaM) had participation in late occurring events preceding necrosis. FP lowering action on body temperature, however, might also play a role in the effects of this drug on the onset of CCl4 induced liver necrosis. FP levels in liver tissue as determined by gas chromatography-mass spectrometry evidenced the presence of the drug in amounts sufficient to inhibit CaM and that suggests that not all preventive effects of FP are due to its indirect actions on the central nervous system via decreased body temperature.
Animals ; Body Temperature Regulation ; drug effects ; Calmodulin ; antagonists & inhibitors ; Carbon Tetrachloride ; toxicity ; Chemical and Drug Induced Liver Injury ; Fluphenazine ; analysis ; pharmacology ; therapeutic use ; Gas Chromatography-Mass Spectrometry ; Lipid Peroxidation ; Liver Diseases ; drug therapy ; pathology ; prevention & control ; Male ; Microsomes, Liver ; metabolism ; Necrosis ; Rats ; Rats, Sprague-Dawley

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In vitro effect of dithiocarbamate pesticides and of CaNa2EDTA on human serum dopamine-beta-hydroxylase.

P de PARIS ; S CAROLDI

Biomedical and Environmental Sciences.1995;8(2):114-121.

Serum dopamine-beta-hydroxylase (DBH) inhibition has been reported in lead workers treated with CaNa2EDTA and in alcoholic patients repeatedly treated with the alcohol aversive drug Disulfiram. The mechanism of inhibition involves Cu++ chelation at the active site of DBH. The effect of CaNa2EDTA and Disulfiram on serum DBH has been compared to the effect of dithiocarbamate pesticides in vitro for the possible use of serum DBH determination for the biological monitoring of workers exposed to these pesticides. Most dithiocarbamates inhibit human serum DBH at micromolar concentrations (range of I50, 0.027-1.6 mumol/L). The inhibitory potency increased from methyl- and dimethyl dithiocarbamates to diethyl dithiocarbamates up to the most potent ethylene bisdithiocarbamates. The I50 of CaNa2EDTA was 3.8 mumol/L, higher than those of dithiocarbamates. Copper addition to the test system reactivated at stoichiometric concentrations dithiocarbamate-inhibited DBH indicating that both base line values and percent of inhibition can be calculated in a single blood sample. Results suggest that serum DBH determination could be useful in case of acute poisoning involving high doses of dithiocarbamate pesticides.
Alcohol Deterrents ; pharmacology ; Biomarkers ; blood ; Chelating Agents ; pharmacology ; Disulfiram ; pharmacology ; Ditiocarb ; pharmacology ; Dopamine beta-Hydroxylase ; blood ; drug effects ; Edetic Acid ; pharmacology ; Female ; Humans ; Male ; Pesticides ; blood

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Intestinal Microbial Community Differs between Acute Pancreatitis Patients and Healthy Volunteers.

Xi Mei ZHANG ; Zheng Yu ZHANG ; Chen Huan ZHANG ; Jing WU ; You Xin WANG ; Guo Xin ZHANG

Biomedical and Environmental Sciences.2018;31(1):81-86. doi:10.3967/bes2018.010

A case control study including 45 acute pancreatitis and 44 healthy volunteers was performed to investigate the association between intestinal microbial community and acute pancreatitis. High-throughput 16S rRNA gene amplicon sequencing was used to profile the microbiological composition of the samples. In total, 27 microbial phyla were detected and the samples of pancreatitis patients contained fewer phyla. Samples from acute pancreatitis patients contained more Bacteroidetes and Proteobacteria and fewer Firmicutes and Actinobacteria than those from healthy volunteers. PCoA analyses distinguished the fecal microbial communities of acute pancreatitis patients from those of healthy volunteers. The intestinal microbes of acute pancreatitis patients are different from those of healthy volunteers. Modulation of the intestinal microbiome may serve as an alternative strategy for treating acute pancreatitis.

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Serum Metabonomics of Articular Cartilage Destruction Induced by T-2 Toxin in Wistar Rats.

Lei ZHU ; Zhi Jun ZHAO ; Xiao Bin REN ; Qiang LI ; Hua DING ; Zhou SUN ; Qing Jun KAO ; Li Hua WANG

Biomedical and Environmental Sciences.2018;31(1):76-80. doi:10.3967/bes2018.009

The molecular pathogenesis of T-2 toxin-induced cartilage destruction has not been fully unraveled yet. The aim of this study was to detect changes in serum metabolites in a rat anomaly model with articular cartilage destruction. Thirty healthy male Wistar rats were fed a diet containing T-2 toxin (300 ng/kg chow) for 3 months. Histopathological changes in femorotibial cartilage were characterized in terms of chondrocyte degeneration/necrosis and superficial cartilage defect, and the endogenous metabolite profile of serum was determined by UPLC/Q-TOF MS. Treated rats showed extensive areas of chondrocyte necrosis and superficial cartilage defect in the articular cartilage. In addition, 8 metabolites were found to change significantly in these rats compared to the control group, including lysoPE (18:0/0:0), lysoPC(14:0), lysoPC[18:4 (6Z,9Z,12Z,15Z)], lysoPC[(16:1(9Z)], lysoPC(16:0), L-valine, hippuric acid, and asparaginyl-glycine. These 8 metabolites associated with cartilage injury are mainly involved in phospholipid and amino acid metabolic pathways.

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Comparative Analysis of the Multi-Frequency Bio-impedance and Dual-energy X-ray Absorptiometry on Body Composition in Obese Subjects.

Zheng He WANG ; Zhong Ping YANG ; Xi Jie WANG ; Yan Hui DONG ; Jun MA

Biomedical and Environmental Sciences.2018;31(1):72-75. doi:10.3967/bes2018.008

To examine accuracy of body composition predicted by the Multi-Frequency Bioelectric Impedance Analysis (MF-BIA) compared with the Dual-energy X-ray Absorptiometry (DXA) in adults with obese. We measured body composition of 749 adults with obese both by the MF-BIA and DXA. The Lin's concordance correlation and the Bland-Altman plots were used to examine the consistency. The concordance correlation coefficient of %BF between the MF-BIA and DXA in men and women was 0.560, and 0.669, respectively. Compared with the DXA, the MF-BIA significantly underestimated %BF by 4.33% in men (P < 0.001), however overestimated %BF by 0.50% in women (P < 0.001). After corrected by the correction equations established in this study, the differences were significantly decreased. Therefore, the MF-BIA (TANITA MC-180) may need to be corrected in estimating body composition for adults with obese.

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Circulating Neutrophil Counts Decrease in Response to Mitigated Air Quality in Stable COPD Patients.

Zi Li ZHANG ; Jian WANG ; Fen LIU ; Ming Jing DING ; Fei LIU ; Si Fan CHEN ; Wen Ju LU ;

Biomedical and Environmental Sciences.2018;31(1):66-71. doi:10.3967/bes2018.007

This three-year study, based on the Guangzhou Institute of Respiratory Disease (GRID), chronic obstructive pulmonary disease (COPD) Biobank, was conducted in 36 COPD patients to estimate whether changes in levels of leukocytes, erythrocytes, hemoglobin, and platelets were related to changes in air pollutant concentration. Daily NO2 levels exhibited significant differences between baseline years and the 2010 Asian Game period. We observed significant reductions in leukocyte and neutrophils counts levels, by 15.51% and 23.01%, from pre-Asian Games to during-Asian Games, respectively. In the post-Asian Game period, most pollutants approximated pre-Asian Game period levels, and similar effects were demonstrated in leukocyte and neutrophil counts. For both items, we identified significant increases resulting from elevated NO2 at lag days 0-2/5-6. We concluded that reductions in pollutants during the intervention period were associated with inactivation of hematological events in COPD.

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Effects of Electromagnetic Radiation on Autophagy and its Regulation.

Yan Hui HAO ; Li ZHAO ; Rui Yun PENG

Biomedical and Environmental Sciences.2018;31(1):57-65. doi:10.3967/bes2018.006

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Rapid Identification and Subtyping of Enterobacter cloacae Clinical Isolates Using Peptide Mass Fingerprinting.

Yi Qian WANG ; Di XIAO ; Juan LI ; Hui Fang ZHANG ; Bao Qing FU ; Xiao Ling WANG ; Xiao Man AI ; Yan Wen XIONG ; Jian Zhong ZHANG ; Chang Yun YE

Biomedical and Environmental Sciences.2018;31(1):48-56. doi:10.3967/bes2018.005

OBJECTIVETo establish a domestic database of Enterobacteria cloacae (E. cloacae), and improve the identification efficiency using peptide mass fingerprinting.

METHODSPeptide mass fingerprinting was used for the identification and subtyping of E. cloacae. Eighty-seven strains, identified based on hsp60 genotyping, were used to construct and evaluate a new reference database.

RESULTSCompared with the original reference database, the identification efficiency and accuracy of the new reference database was greatly improved at the species level. The first super reference database for E. cloacae identification was also constructed and evaluated. Based on the super reference database and the main spectra projection dendrogram, E. cloacae strains were divided into two clades.

CONCLUSIONPeptide mass fingerprinting is a powerful method to identify and subtype E. cloacae, and the use of this method will allow us to obtain more information to understand the heterogeneous organism E. cloacae.

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Repeat HIV Testing and Incident Rates among Individuals Attending Voluntary Counseling and Testing Clinics in Wuxi, China: A Retrospective Study.

Xiao Jun MENG ; Andrew GRULICH ; Xu Wen WANG ; Han Lu YIN ; Jing GU ; Xuan ZHANG ; Jing GU ; Hua Chun ZOU ;

Biomedical and Environmental Sciences.2018;31(1):37-47. doi:10.3967/bes2018.004

OBJECTIVEWe aimed to elucidate the rates of repeat HIV testing and incident HIV diagnosis, and baseline CD4+ T cell count among individuals attending HIV voluntary counseling and testing (VCT) clinics in Wuxi, China.

METHODSA repeat HIV testing within 12 months was recorded if individuals had their first test with negative results, during 2013-2014 and retested within 12 months. An incident HIV diagnosis was recorded if individuals had their first test with negative results, during 2013-2015 and had a subsequent positive result at any point by the end of 2015. Data on HIV testing and diagnosis among individuals attending 32 VCT clinics from 2013 to 2015 and HIV diagnosis from other clinical services in Wuxi, China, were retrieved. A multivariate logistic regression model was used to analyze factors associated with repeat HIV testing. Cox regression was used to evaluate factors associated with incident HIV diagnosis.

RESULTSFrom 2013 to 2014, 11,504 individuals tested HIV negative at their first recorded test, with 655 (5.7%) retesting within 12 months. Higher repeat HIV testing within 12 months was associated with male gender [adjusted odds ratio (aOR) = 1.7, 95% confidence interval (CI): 1.4-2.2], risk behaviors [commercial heterosexual behaviors (aOR = 1.4, CI: 1.1-1.6), male-male sexual behaviors (aOR = 3.7, CI: 2.7-4.9)], injection drug use (aOR = 9.9, CI: 6.5-15.1), and having taken HIV tests previously (aOR = 2.0, CI: 1.6-2.4). From 2013 to 2015, 1,088 individuals tested negative on HIV test at their visit and at ⋝ 2 subsequent tests; of them 30 had incident HIV diagnosis. The overall rate of incident HIV diagnosis among all VCT individuals was 1.6 (95% CI: 1.1-2.1) per 100 person-years. Incident HIV diagnosis was associated with male gender [adjusted hazard ratio (aHR) = 8.5, 95% CI: 1.9-38.1], attending hospital-based VCT clinics (aHR = 7.8, 95% CI: 1.1-58.3), and male-male sexual behavior (aHR = 8.4, 95% CI: 1.5-46.7). Individuals diagnosed at VCT clinics had higher CD4+ T cell count compared with those diagnosed at other clinical services (median 407 vs. 326 copies/mm3, P = 0.003).

CONCLUSIONVCT individuals in Wuxi, China, had a low repeat HIV testing rate and high HIV incidence. VCT-clinic-based interventions aimed at increasing repeat HIV testing are needed to detect more cases at an earlier stage, especially among individuals at high risk for HIV infection such as men who have sex with men.

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Health Risk Impacts of Exposure to Airborne Metals and Benzo(a)Pyrene during Episodes of High PM10 Concentrations in Poland.

Kamila WIDZIEWICZ ; Wioletta ROGULA-KOZLOWSKA ; Krzysztof LOSKA ; Karolina KOCISZEWSKA ; Grzegorz MAJEWSKI

Biomedical and Environmental Sciences.2018;31(1):23-36. doi:10.3967/bes2018.003

OBJECTIVETo check whether health risk impacts of exposure to airborne metals and Benzo(a) Pyrene during episodes of high PM10 concentrations lead to an increased number of lung cancer cases in Poland.

METHODSIn this work, we gathered data from 2002 to 2014 concerning the ambient concentrations of PM10 and PM10-bound carcinogenic Benzo(a)pyrene [B(a)P] and As, Cd, Pb, and Ni. With the use of the criterion of the exceedance in the daily PM10 mass concentration on at least 50% of all the analyzed stations, the PM10 maxima's were selected. Lung cancer occurrences in periods with and without the episodes were further compared.

RESULTSDuring a 12-year period, 348 large-scale smog episodes occurred in Poland. A total of 307 of these episodes occurred in the winter season, which is characterized by increased emissions from residential heating. The occurrence of episodes significantly (P < 0.05) increased the concentrations of PM10-bound carcinogenic As, Cd, Pb, Ni, and B(a)P. During these events, a significant increase in the overall health risk from those PM10-related compounds was also observed. The highest probability of lung cancer occurrences was found in cities, and the smallest probability was found in the remaining areas outside the cities and agglomerations.

CONCLUSIONThe link between PM pollution and cancer risk in Poland is a serious public health threat that needs further investigation.

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