采用荧光快速检测 DNA 解螺旋(FADU)方法检测了环境致癌物苯并(a)芘在体外对人外周血白细胞 DNA 的损伤作用。结果显示,经大鼠肝 S_■混合液活化的苯并(a)芘在0.01～100.0μM 剂量范围内可使白细胞 DNA 链断裂明显增加,细胞内剩余双链 D...采用荧光快速检测 DNA 解螺旋(FADU)方法检测了环境致癌物苯并(a)芘在体外对人外周血白细胞 DNA 的损伤作用。结果显示,经大鼠肝 S_■混合液活化的苯并(a)芘在0.01～100.0μM 剂量范围内可使白细胞 DNA 链断裂明显增加,细胞内剩余双链 DNA 降低24～61%(P<0.05),且存在明显的剂量效应关系。未经活化的苯并(a)芘则未出现明显的 DNA 损伤效应。结果还提示,苯并(a)芘的 DNA 损伤效应是由其活性代谢产物引起的,该 FADU 检测方法同(?)适用于检测能引起 DNA 链断裂的间接致突变物和致癌物。展开更多
Benzo[a]pyrene （B[a]P） is an increasingly present marine environmental pollutant, yet our understanding of the long-term consequences of reproductive toxicity in marine benthic polychaetes remains limited. To test t...Benzo[a]pyrene （B[a]P） is an increasingly present marine environmental pollutant, yet our understanding of the long-term consequences of reproductive toxicity in marine benthic polychaetes remains limited. To test the reproductive toxicity of B[a]P on polychaetes, Perinereis nuntia was exposed to B[a]P-contaminated artificial seawater and sexual maturation, the sex ratio, number of eggs spawned, fertilization and hatching rated, as well as vitellogenin （VTG） mRNA expression levels were analyzed. A low concentration of B[a]P （2.5 gg/L） had no effects on the rate of sexual maturation, spawning, or fertilization but significantly increased the sex ratio （female： male） from 1.6±0.15：1 to 2.3±0.18：1, inhibited hatching rate by 27%, and significantly increased VTG mRNA expression level by 3.7-fold following a 60-day exposure, compared with those in the solvent controls. A higher concentration of B[a]P （25 μg/L） caused more serious effects; sexual maturation, fertilization success, and hatching decreased by 31%, 17% and 46%, respectively, and the sex ratio （female： male） and VTG mRNA gene expression level increased by 54% and 7.1-fold, respectively. These results demonstrate that sublethal concentrations of B[a]P negatively affect reproductive performance of the sandworm P. nuntia.展开更多
Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer ...Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer tissues and tissues without pancreatic cancer were extracted by ultrasonic extraction (UE).And then the extracts were cleaned up by solid phase extraction and analyzed by high performance liquid chromatography (HPLC) with fluorescence spectroscopy.Results:Four kinds of PAHs were detected,which were chrysene,2-methylanthracene,pyrene and benzo (a) pyrene.The contents of the four PAHs were not statistically significant between pancreatic cancer and adjacent tissues (P > 0.05).The contents of 2-methylanthracene,pyrene and benzo (a) pyrene in pancreatic cancer and adjacent tissues were higher than tissues without pancreatic cancer,the differences were statistically significant (P < 0.05).The contents of chrysene in the three kinds of pancreatic tissues were not statistically significant (P > 0.05).Conclusion:PAHs were found in human pancreatic tissues.Human pancreatic tissues have extremely strong ability of bio-concentrating PAHs.PAHs might play an important role in the occurrence of human pancreatic cancer.展开更多
文摘采用荧光快速检测 DNA 解螺旋(FADU)方法检测了环境致癌物苯并(a)芘在体外对人外周血白细胞 DNA 的损伤作用。结果显示,经大鼠肝 S_■混合液活化的苯并(a)芘在0.01～100.0μM 剂量范围内可使白细胞 DNA 链断裂明显增加,细胞内剩余双链 DNA 降低24～61%(P<0.05),且存在明显的剂量效应关系。未经活化的苯并(a)芘则未出现明显的 DNA 损伤效应。结果还提示,苯并(a)芘的 DNA 损伤效应是由其活性代谢产物引起的,该 FADU 检测方法同(?)适用于检测能引起 DNA 链断裂的间接致突变物和致癌物。
基金Supported by the Guangdong High-Level University Project"Green Technologies for Marine Industries"(No.130-33106703)Guangdong Natural Science Foundation(2016A030313065)the Outstanding Young Teachers of Guangdong Colleges and Universities(No.YQ2015074)
文摘Benzo[a]pyrene （B[a]P） is an increasingly present marine environmental pollutant, yet our understanding of the long-term consequences of reproductive toxicity in marine benthic polychaetes remains limited. To test the reproductive toxicity of B[a]P on polychaetes, Perinereis nuntia was exposed to B[a]P-contaminated artificial seawater and sexual maturation, the sex ratio, number of eggs spawned, fertilization and hatching rated, as well as vitellogenin （VTG） mRNA expression levels were analyzed. A low concentration of B[a]P （2.5 gg/L） had no effects on the rate of sexual maturation, spawning, or fertilization but significantly increased the sex ratio （female： male） from 1.6±0.15：1 to 2.3±0.18：1, inhibited hatching rate by 27%, and significantly increased VTG mRNA expression level by 3.7-fold following a 60-day exposure, compared with those in the solvent controls. A higher concentration of B[a]P （25 μg/L） caused more serious effects; sexual maturation, fertilization success, and hatching decreased by 31%, 17% and 46%, respectively, and the sex ratio （female： male） and VTG mRNA gene expression level increased by 54% and 7.1-fold, respectively. These results demonstrate that sublethal concentrations of B[a]P negatively affect reproductive performance of the sandworm P. nuntia.
基金Supported by agrant from Key Laboratory of Marine SpillOil Identification and Damage Assessment Technology (No. 200902)
文摘Objective:The aim of this study was to investigate the effect of polycyclic aromatic hydrocarbons (PAHs) on the occurrence of human pancreatic cancer.Methods:PAHs in human pancreatic cancer,adjacent pancreatic cancer tissues and tissues without pancreatic cancer were extracted by ultrasonic extraction (UE).And then the extracts were cleaned up by solid phase extraction and analyzed by high performance liquid chromatography (HPLC) with fluorescence spectroscopy.Results:Four kinds of PAHs were detected,which were chrysene,2-methylanthracene,pyrene and benzo (a) pyrene.The contents of the four PAHs were not statistically significant between pancreatic cancer and adjacent tissues (P > 0.05).The contents of 2-methylanthracene,pyrene and benzo (a) pyrene in pancreatic cancer and adjacent tissues were higher than tissues without pancreatic cancer,the differences were statistically significant (P < 0.05).The contents of chrysene in the three kinds of pancreatic tissues were not statistically significant (P > 0.05).Conclusion:PAHs were found in human pancreatic tissues.Human pancreatic tissues have extremely strong ability of bio-concentrating PAHs.PAHs might play an important role in the occurrence of human pancreatic cancer.
