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| 1 | Dietary exposure to di-isobutyl phthalate increases urinary 5-methyl-2′-deoxycytidine level and affects reproductive function in adult male mice显示文摘Phthalates are a large family of ubiquitous environmental pollutants suspected of being endocrine disruptors. Epidemiological studies have associated phthalate metabolites with decreased reproductive parameters and linked phthalate exposure with the level of urinary 5-methyl-2′-deoxycytidine(5mdC, a product of methylated DNA). In this study, adult male mice were exposed to 450 mg di-isobutyl phthalate(DiBP)/(kg·day) via dietary exposure for 28 days. Mono-isobutyl phthalate(Mi BP, the urinary metabolite) and reproductive function parameters were determined. The levels of 5mdC and 5-hydroxymethyl-2′-deoxycytidine(5hmdC) were measured in urine to evaluate if their contents were also altered by DiBP exposure in this animal model. Results showed that DiBP exposure led to a significant increase in the urinary 5mdC level and significant decreases in sperm concentration and motility in the epididymis, accompanied with reduced testosterone levels and downregulation of the P450 cholesterol side-chain cleavage enzyme(P450scc) gene in the mice testes. Our findings indicated that exposure to DiBP increased the urinary 5mdC levels,which supported our recent epidemiological study about the associations of urinary 5mdC with phthalate exposure in the male human population. In addition, DiBP exposure impaired male reproductive function, possibly by disturbing testosterone levels; P450scc might be a major steroidogenic enzyme targeted by DiBP or other phthalates. | Yitao Pan Xiaoyang Wang Leo W.Y.Yeung Nan Sheng Qianqian Cui Ruina Cui Hongxia Zhang Jiayin Dai | 2017 | Journal of Environmental Sciences2017，29，11： | 5 |
| 2 | Inhibition effects of perfluoroalkyl acids on progesterone production in mLTC-1显示文摘Perfluoroalkyl substances(PFASs) are a class of fluorine substituted carboxylic acid, sulfonic acid and alcohol, structurally similar to their corresponding parent compounds. Previous study demonstrated the potential endocrine disruption and reproductive toxicity of perfluorooctane sulfonic acid and perfluorooctanoic acid, two dominant PFASs in animals and humans. We explored the relationship between eleven perfluoroalkyl acids(PFAAs)with different carbon chain length and their ability to inhibit progesterone production in mouse Leydig tumor cells(m LTC-1). We found an obvious dose–response relationship between progesterone inhibition rate and PFAA exposure concentration in m LTC-1. The relative inhibition rate of progesterone by PFAAs was linearly related to the carbon chain length and molar refractivity of PFAAs. Mitochondrial membrane potential(MMP) decreased after PFAA exposure at the half-maximal inhibitory effect concentration(IC_(50)) of progesterone production in m LTC-1, while the reactive oxygen species(ROS) content increased significantly. These results imply that the inhibition effect of PFAAs on progesterone production might be due, in part, to ROS damage and the decrease in MMP in m LTC-1. | Wei Zhao Ruina Cui Jianshe Wang Jiayin Dai | 2017 | Journal of Environmental Sciences2017，29，6： | 2 |
| 3 | Ethacrynic acid targets GSTM1 to ameliorate obesity by promoting browning of white adipocytes显示文摘Dear Editor,Obesity is caused by an imbalance between energy intake and expenditure,and has become a global epidemic with over 650 million adults affected.Adipose tissues in mammals are composed of white adipose tissue(WAT)and classical brown adipose tissue(BAT),and their balance is highly related to the occurrence of obesity.The browning of white adipocytes results in“beige”or“brite”adipocytes,which appear functionally similar to classical brown adipocytes,and can be detected in WAT deposits of animals that have been exposed to cold or other inducers(Fu et al.,2015). | Zhaomeng Cui Yang Liu Wei Wan Yuyan Xu Yehui Hu Meng Ding Xin Dou Ruina Wang Hailing Li Yongmei Meng Wei Li Wei Jiang Zengxia Li Yiming Li Minjia Tan Dengke KMa Yu Ding Jun OLiu Cheng Luo Biao Yu Qiqun Tang Yongjun Dang | 2021 | Protein & Cell2021，12，6： | 1 |
| 4 | Heavy metalconcentrations in water sediment and tissues of two fish species显示文摘 | WANG Yimin CHEN Peng CUI Ruina | 2010 | Environmental Monitoring and Assessment2010，165，： | 1 |
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