2020 Vol. 33, No. 2

2020, 33(2)
2020, 33(2): 1-2.
Original Article
Urine Metabonomic Analysis of Interventions Effect of Soy Isoflavones on Rats Exposed to Di-(2-ethylhexyl) Phthalate
DONG Xin Wen, YAO San Qiao, WU Hao Yu, ZHANG Yun Bo, WANG Cheng, NA Xiao Lin, WU Wei Dong
2020, 33(2): 77-88. doi: 10.3967/bes2020.012
Objective Di-(2-ethylhexyl) phthalate (DEHP) is a ubiquitous environmental contaminant. As an endocrine disruptor, it seriously threatens human health and ecological environmental safety. This study examines the impact of intervention with soybean isoflavones (SIF) on DEHP-induced toxicity using a metabonomics approach. Methods Rats were randomly divided into control (H), SIF-treated (A, 86 mg/kg body weight), DEHP-treated (B, 68 mg/kg), and SIF plus DEHP-treated (D) groups. Rats were given SIF and DEHP daily through diet and gavage, respectively. After 30 d of treatment, rat urine was tested using UPLC/MS with multivariate analysis. Metabolic changes were also evaluated using biochemical assays. Results Metabolomics analyses revealed that p-cresol glucuronide, methyl hippuric acid, N1-methyl-2-pyridone-5-carboxamide, lysophosphatidycholine [18:2 (9Z, 12Z)] {lysoPC [18:2 (9Z, 12Z)]}, lysoPC (16:0), xanthosine, undecanedioic acid, and N6-acetyl-l-lysine were present at significantly different levels in control and treatment groups. Conclusion SIF supplementation partially protects rats from DEHP-induced metabolic abnormalities by regulating fatty acid metabolism, antioxidant defense system, amino acid metabolism, and is also involved in the protection of mitochondria.
Organic and Inorganic Mercury in Biological Samples of Flouresecent Lamp Industries Workers and Health Risks
Nayab GUL, Sardar KHAN, Abbas KHAN, Javed NAWAB, Adnan SARWAR, Nida GUL
2020, 33(2): 89-102. doi: 10.3967/bes2020.013
Objective The present study aims to investigate the concentrations of Hg and its aspects methyl mercury (Me-Hg) and inorganic mercury (I-Hg) in the biological samples (BSs) of fluorescent lamp industries workers (FLIWs). Methodology Different BSs including red blood cells (RBCs), plasma, urine, hair and nails were collected from the workers exposed to Hg and unexposed persons were selected as control group to measure both the T-Hg concentration as well as its species in different biological samples through quantitative analysis. Health data was collected through questionnaire survey. Results The mean concentrations of T-Hg (31.9 µg/L), Me-Hg (27.7 µg/L), and I-Hg (5.36 µg/L) in RBCs were found significantly (P < 0.001) higher among the workers (n = 40) as compared to the control group (n = 40). Similarly the mean Hg concentrations in plasma, urine, hair and nails were also significantly higher among the workers than the control group. The statistical relation between Hg concentration and demographic characteristics observed that workers experience and fish consumption has increased the Hg concentration while age, weight and smoking found no significant effect on Hg concentration in the BSs. Conclusion The study observed that the workers were highly exposed to high concentration of Hg and they are at a high health risk.
Cross-neutralizing Anti-hemagglutinin Antibodies Isolated from Patients Infected with Avian Influenza A (H5N1) Virus
SUN Ying, CAO Yang, LI Zi, BAI Tian, ZHANG Hong, HU Shi Xiong, LI Fang Cai, ZHAO Xiang, CHEN Yong Kun, LU Jian, LIU Li Qi, WANG Da Yan, SHU Yue Long, ZHOU Jian Fang
2020, 33(2): 103-113. doi: 10.3967/bes2020.014
Objective To recover broad-neutralizing monoclonal antibodies (BnAbs) from avian influenza A (H5N1) virus infection cases and investigate their genetic and functional features. Methods We screened the Abs repertoires of expanded B cells circulating in the peripheral blood of H5N1 patients. The genetic basis, biological functions, and epitopes of the obtained BnAbs were assessed and modeled. Results Two BnAbs, 2-12D5, and 3-37G7.1, were respectively obtained from two human H5N1 cases on days 12 and 21 after disease onset. Both Abs demonstrated cross-neutralizing and Ab-dependent cellular cytotoxicity (ADCC) activity. Albeit derived from distinct Ab lineages, i.e., VH1-69-D2-15-JH4 (2-12D5) and VH1-2-D3-9-JH5 (3-32G7.1), the BnAbs were directed toward CR6261-like epitopes in the HA stem, and HA2 I45 in the hydrophobic pocket was the critical residue for their binding. Signature motifs for binding with the HA stem, namely, IFY in VH1-69-encoded Abs and LXYFXW in D3-9-encoded Abs, were also observed in 2-12D5 and 3-32G7.1, respectively. Conclusions Cross-reactive B cells of different germline origins could be activated and re-circulated by avian influenza virus. The HA stem epitopes targeted by the BnAbs, and the two Ab-encoding genes usage implied the VH1-69 and D3-9 are the ideal candidates triggered by influenza virus for vaccine development.
Comparison of the Pathogenicity of Neisseria meningitidis Isolates of Hyperinvasive Sequence Type 7 Belonging to Serogroups A, B, C, and X
GUO Peng Bo, ZHU Bing Qing, XU Li, GAO Wan Ying, GAO Yuan, LIANG Hao, ZHANG Mao Jun, SHAO Zhu Jun
2020, 33(2): 114-122. doi: 10.3967/bes2020.015
Objective To compare the pathogenicity of isolates of sequence type 7 (ST-7) Neisseria meningitidis (N. meningitidis) belonging to four different serogroups (A, B, C, and X). Methods Four ST-7 N. meningitidis isolates serogrouped as A, B, C, and X and characterized by different capsule structures, were examined for their adhesion and invasion properties, and their ability to induce cytokine release and apoptosis in the host cell (the A549 cell line). Results Among the four ST-7 N. meningitidis isolates, the serogroup A isolate possessed the strongest adhesion and invasion ability. This isolate also induced the release of the highest levels of the pro-inflammatory mediators interleukin-6, interleukin-1β, and interferon, and the highest apoptosis rate in the host cells. However, there was no significant difference in interleukin-8 and tumor necrosis factor-α secretion between the four isolates. Based on the findings, the serogroup X N. meningitidis isolate had the weakest pathogenicity, whereas there was almost no difference in the pathogenicity of the isolates from serogroups B and C. Conclusions The differences in the capsular structure of the four isolates of ST-7 N. meningitidis affected their pathogenic capacities. The findings also imply that the hyperinvasive ST-7 N. meningitidis lineage may include hypoinvasive isolates.
Frequent Import and Multiple Sources of Dengue Fever have Changed the Epidemic Situation of the Disease in Fujian Province, China
WANG Jin Zhang, YOU Li Bin, KAN Nai Peng, LIN Qi, WENG Yu Wei, ZHENG Kui Cheng
2020, 33(2): 123-132. doi: 10.3967/bes2020.016
Objective The aim of this study was to update the epidemic situation of dengue fever (DF) and provide new insights for the consideration of disease control in Fujian province, China. Methods Details about DF cases in Fujian reported during 2004–2017 were collected and analyzed. The envelope (E) genes of isolates of dengue virus (DENV) were sequenced for phylogenetic analysis. Results The number of imported DF cases had increased dramatically since 2013, and the source regions expanded from Southeast Asia to South Asia, America, Oceania, and Africa, as well as the surrounding provinces. This resulted in local outbreaks and indigenous cases of DF that occurred more frequently, with 10 of 13 local outbreaks and 85.9% (1,252/1,458) of indigenous cases reported in 2013–2017. Compared with only two coastal cities before 2013, four coastal and one inland city in 2013–2017 experienced the local DF outbreaks. The phylogenetic analysis of E genes confirmed that the import of DENV, not only from abroad but also from the surrounding provinces, played an important role in dissemination and local outbreaks of DF in Fujian. Conclusions The frequent import of DF cases from not only abroad but also the surrounding provinces resulted in increased incidence, frequent local outbreaks, and expansion of distribution in Fujian in recent years. There is a need for urgent measures to improve disease control in this province.
Letter to the Editor
Association between Chinese Famine Exposure and the Risk of Overweight/Obesity and Abdominal Obesity in Laterlife: A Cross-sectional Study
HUANG Li Na, WANG Hui Jun, WANG Zhi Hong, DING Gang Qiang
2020, 33(2): 133-137. doi: 10.3967/bes2020.017
This study aimed to examine the association between famine exposure in different stages of life and the risk of overweight/obesity and abdominal obesity in laterlife. A total of 12,458 participants were categorized into non-exposure and four direct exposures, including fetal, childhood, adolescence, and adult exposure. Only risk of being overweight or obesity in adolescence exposure [odds ratio (OR), 1.45; 95% confidence interval (CI), 1.08–1.94] was significantly higher than in non-exposure. Childhood (OR, 1.27; 95% CI, 1.05–1.54) and adolescence (OR, 1.53; 95% CI, 1.15–2.05) exposures had significantly an increased risk of abdominal obesity compared with non-exposure. Additionally, different famine severity exposures had different influences on the development of overweight/obesity and abdominal obesity. Famine exposure in adolescence, which was a behavior formative period, can increase the risk of overweight/obesity and abdominal obesity in adulthood, specifically in famine severely affect area.
Retrospective Study of Effect of Fine Particulate Matter on Acute Exacerbation of Patients with Idiopathic Pulmonary Fibrosis
CHE Chun Li, DONG Fu Shi, LI Jia Lin, ZHANG Chun Ling, LIU Lu, WU Yu Han, WANG Kun, QI Hong
2020, 33(2): 138-140. doi: 10.3967/bes2020.018
Comparison of the Absorption and Distribution of Cadmium via Cadmium Chloride and Cadmium-contaminated Rice in Rats
WU Qian, WANG Lei, CHEN Yu Wei, ZHANG Hu, FANG Min, WU Yong Ning, GONG Zhi Yong
2020, 33(2): 141-144. doi: 10.3967/bes2020.019
Effects of Treatment with Different Combinations of Bisphenol Compounds on the Mortality of Caenorhabditis Elegans
Naomi HAMAMBA, LI Jie, ZHANG Xiao Wei, ZHANG Cai Qin, Frederick SARPONG, ZHOU Xing Hua
2020, 33(2): 145-149. doi: 10.3967/bes2020.020