This study was conducted to elucidate the reproductive effect of NP on testis,epididymis and epididymal sperm in vivo.Adult male SpragueDawley rats were gavaged with NP at 0,40,100,or 250 mg/kg body weight（bw） on al...This study was conducted to elucidate the reproductive effect of NP on testis,epididymis and epididymal sperm in vivo.Adult male SpragueDawley rats were gavaged with NP at 0,40,100,or 250 mg/kg body weight（bw） on alternate days for 90 d.The results showed that oral administration of NP may damage the structure and function of testis,induce apoptosis and oxidative stress in epididymis or even have cytotoxic effects on epididymal sperm.展开更多
Objective To evaluate the possible association between radon exposure and kidney cancer. Methods We performed a systematic review and a meta-analysis based on random effect models to provide a pooled association measu...Objective To evaluate the possible association between radon exposure and kidney cancer. Methods We performed a systematic review and a meta-analysis based on random effect models to provide a pooled association measure. Results We subjected 8 studies(overall relative risks and 95% confidence intervals: 1.01, 0.72 to 1.43, I2= 64.4%) to meta-analysis. Subgroup analysis revealed a marginally significant association between radon exposure and kidney cancer in studies conducted in Europe. Two population-based studies provided no evidence for the increased risk of kidney cancer in the general population. Conclusion The association between radon and kidney cancer remains unclear but cannot be excluded because of its biological plausibility and the limited number and quality of existing studies. Additional data from the general population and well-designed miner cohort studies are needed to reveal the real relationship between radon exposure and kidney cancer.展开更多
Objective:We investigated the influence of β-receptor blocker metoprolol on return of spontaneous circulation(ROSC) during cardiopulmonary resuscitation(CPR) in rats with induced myocardial infarction(MI).Methods:Mal...Objective:We investigated the influence of β-receptor blocker metoprolol on return of spontaneous circulation(ROSC) during cardiopulmonary resuscitation(CPR) in rats with induced myocardial infarction(MI).Methods:Male Sprague-Dawley rats were randomly divided into three groups:the sham-operated group,the MI group without metoprolol,which was fed the vehicle,and the MI+metoprolol group receiving intragastric metoprolol.Each group was further divided randomly into three subgroups,depending on the dosage of epinephrine administered during subsequent CPR applied after the induction of asphyxial cardiac arrest.Results:The ROSC rate was significantly decreased in the low dose subgroup of MI group,unchanged in the medium dose subgroup of MI group,and significantly decreased in the high dose subgroup of MI group,compared with the same dose subgroup of sham-operated group.MI+metoprolol group had a lower ROSC rate than MI group in the medium dose subgroup,and a higher ROSC rate than MI group in the high dose subgroup.There was no difference in blood K+ values of successful rats between MI group and MI+metoprolol group.The rats with successful CPR had lower blood K+ values than rats with unsuccessful CPR in each of the three treatment groups.Conclusions:Metoprolol administered to MI rats over a long period significantly improved ROSC rates under an appropriate dose of epinephrine during CPR.An increasing high blood K+ value would attenuate the rate of a successful CPR.展开更多
基金supported by‘A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)’
文摘This study was conducted to elucidate the reproductive effect of NP on testis,epididymis and epididymal sperm in vivo.Adult male SpragueDawley rats were gavaged with NP at 0,40,100,or 250 mg/kg body weight（bw） on alternate days for 90 d.The results showed that oral administration of NP may damage the structure and function of testis,induce apoptosis and oxidative stress in epididymis or even have cytotoxic effects on epididymal sperm.
基金supported by the National Natural Scientific Foundation of China [Grant ref:81673126,81703205]China Postdoctoral Science Foundation [Grant ref:2017T100402]+3 种基金Youth Foundation of Jiangsu Province [Grant ref:BK20160333]Natural Science Research in Colleges and Universities of Jiangsu Province [Grant ref:16KJB330008]China Postdoctoral Science Foundation [Grant ref:2016M600440]Postdoctoral Science Foundation of Jiangsu Province [Grant ref:1601079C]
文摘Objective To evaluate the possible association between radon exposure and kidney cancer. Methods We performed a systematic review and a meta-analysis based on random effect models to provide a pooled association measure. Results We subjected 8 studies(overall relative risks and 95% confidence intervals: 1.01, 0.72 to 1.43, I2= 64.4%) to meta-analysis. Subgroup analysis revealed a marginally significant association between radon exposure and kidney cancer in studies conducted in Europe. Two population-based studies provided no evidence for the increased risk of kidney cancer in the general population. Conclusion The association between radon and kidney cancer remains unclear but cannot be excluded because of its biological plausibility and the limited number and quality of existing studies. Additional data from the general population and well-designed miner cohort studies are needed to reveal the real relationship between radon exposure and kidney cancer.
基金Project (No. 2009K16-02) supported by the Shaanxi Provincial Science and Technology Program of China
文摘Objective:We investigated the influence of β-receptor blocker metoprolol on return of spontaneous circulation(ROSC) during cardiopulmonary resuscitation(CPR) in rats with induced myocardial infarction(MI).Methods:Male Sprague-Dawley rats were randomly divided into three groups:the sham-operated group,the MI group without metoprolol,which was fed the vehicle,and the MI+metoprolol group receiving intragastric metoprolol.Each group was further divided randomly into three subgroups,depending on the dosage of epinephrine administered during subsequent CPR applied after the induction of asphyxial cardiac arrest.Results:The ROSC rate was significantly decreased in the low dose subgroup of MI group,unchanged in the medium dose subgroup of MI group,and significantly decreased in the high dose subgroup of MI group,compared with the same dose subgroup of sham-operated group.MI+metoprolol group had a lower ROSC rate than MI group in the medium dose subgroup,and a higher ROSC rate than MI group in the high dose subgroup.There was no difference in blood K+ values of successful rats between MI group and MI+metoprolol group.The rats with successful CPR had lower blood K+ values than rats with unsuccessful CPR in each of the three treatment groups.Conclusions:Metoprolol administered to MI rats over a long period significantly improved ROSC rates under an appropriate dose of epinephrine during CPR.An increasing high blood K+ value would attenuate the rate of a successful CPR.
