Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developm...Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developmental toxicity of BCDMH on zebrafish embryos and the dose-effect relationship was determined.The effect of BCDMH exposure on histopathology and tissue antioxidant activity of adult zebrafish were observed over time.Results Exposure to 4 mg/L BCDMH post-fertilization was sufficient to induce a number of developmental malformations,such as edema,axial malformations,and reductions in heart rate and hatching rate.The no observable effects concentration of BCDMH on zebrafish embryo was 0.5 mg/L.After 96 h exposure,the 50% lethal concentration （95% confidence interval （CI）） of BCDMH on zebrafish embryo was 8.10 mg/L （6.15-11.16 mg/L）.The 50% inhibitory concentration （95% CI） of BCDMH on hatching rate was 7.37 mg/L （6.33-8.35 mg/L）.Histopathology showed two types of responses induced by BCDMH,defensive and compensatory.The extreme responses were marked hyperplasia of the gill epithelium with lamellar fusion and epidermal peeling.The histopathologic changes in the gills after 10 days exposure were accompanied by significantly higher catalase activity and lipid peroxidation.Conclusion These results have important implications for studies on the toxicity and use of BCDMH and its analogs.展开更多
In this paper single crystals of 3-allyl-5,5-dimethylhydantoin（ADMH）have successfully extracted through recrystallization from a mixture solvents of dichloromethane and petroleum ether.By using single-crystal X-ray ...In this paper single crystals of 3-allyl-5,5-dimethylhydantoin（ADMH）have successfully extracted through recrystallization from a mixture solvents of dichloromethane and petroleum ether.By using single-crystal X-ray diffraction technique,its crystal structure has been determined to belong to monoclinic system,with space group P2（1）/n,a=0.599 53（12）,b=0.983 7（2）,c=1.529 0（3）nm,β=100.43（3）°,V=0.886 9（3）nm3,Z=4,Dc=1.260 g/cm3,F（000）=360,μ（MoKα）=0.092 mm-1,Mr=168.20,R=0.042 2 and wR=0.108 5 for 1 755 observed reflections（I〉2σ（I））.Also,its chemical formula has been confirmed as C8H12N2O2.Results of crystal structures determination for the compound show that the bond of N（1）-C（2）has a double-bond characteristic and there are intermolecular hydrogen bonds.This crystal exists in the form of dimers,in which the two constituent ADMH molecules build into an H-bond-centered symmetric pattern.展开更多
The efficient and regenerable antibacterial properties of Nhalamines make them an ideal candidate for parapretion of antimicrobial textiles. In this study,a 5,5-dimethylhydantoin-based reactive N-halamine precursor, 4...The efficient and regenerable antibacterial properties of Nhalamines make them an ideal candidate for parapretion of antimicrobial textiles. In this study,a 5,5-dimethylhydantoin-based reactive N-halamine precursor, 4-( 4-( 3-( 3-hydroxypropyl)-5,5-dimethylhydantoin)-6-chloro-1,3,5-triazinylamino)-benzenesulfonate( HTB), was synthesized and characterized by ~1H-NMR. The synthesized compound was coated to cotton fabrics via reactive dye dyeing process. The coated cotton showed excellent antimicrobial activities against S. aureus( Gram-positive) and E. coli O157: H7( Gram-negative) with short contact times after exposing to diluted household bleach. The treatment method used in this study has a small effect on the tensile strength of cotton fabrics. The durability and regenerability of the chlorinated cotton samples were tested.Although the chlorine content decreased towards washing and storage,almost all of the initial oxidative chlorine levels could be regained after rechlorination.展开更多
目的:研究长链非编码RNA(lncRNA)生长阻滞特异性转录物5(GAS5)基因多态性与多囊卵巢综合征(PCOS)发病的关联性。方法:选取2018年5月~2019年5月在广西右江民族医学院附属医院生殖医学中心确诊的236例PCOS患者作为病例组,同时选取同期性...目的:研究长链非编码RNA(lncRNA)生长阻滞特异性转录物5(GAS5)基因多态性与多囊卵巢综合征(PCOS)发病的关联性。方法:选取2018年5月~2019年5月在广西右江民族医学院附属医院生殖医学中心确诊的236例PCOS患者作为病例组,同时选取同期性别、年龄相匹配的277例健康女性作为对照组,采用iMLDR单核苷酸多态性(SNP)分型方法检测GAS5基因rs145204276 I/D、rs55829688 C/T和rs6790 G/A位点基因型。采用logistic回归分析GAS5基因多态性与PCOS的相关性。结果:GAS5基因rs145204276 I/D位点多态性在对照组和PCOS组之间差异有统计学意义,logistic回归分析结果显示,与I/I基因型相比,I/D和D/D基因型以及显性模型I/D+D/D具有较低的PCOS发病风险[I/D vs I/I:OR(95%CI)=0.61(0.42,0.88),P=0.009;D/D vs I/I:OR(95%CI)=0.44(0.23,0.84),P=0.013;I/D+D/D vs I/I:OR(95%CI)=0.57(0.40,0.81),P=0.002];与I等位基因相比,D等位基因显著降低PCOS的发病风险[D vs I:OR(95%CI)=0.62(0.47,0.82),P=0.001]。rs55829688 C/T和rs6790 G/A位点多态性在对照组和PCOS组之间比较差异均无统计学意义(P>0.05)。单倍型联合分析显示D-T-A单倍型在对照组和PCOS组间的分布差异有统计学意义[OR(95%CI)=0.61(0.45,0.84),P=0.002]。结论:GAS5基因rs145204276 I/D位点多态性可能与PCOS遗传易感性相关,即携带D等位基因的个体可能具有较低的PCOS发病风险。展开更多
特应性皮炎是一种常见的慢性炎症性皮肤病,其发病机制复杂,涉及免疫调节异常、皮肤屏障功能障碍和神经免疫相互作用等多个方面。近年来,随着对特应性皮炎研究的深入,分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)和...特应性皮炎是一种常见的慢性炎症性皮肤病,其发病机制复杂,涉及免疫调节异常、皮肤屏障功能障碍和神经免疫相互作用等多个方面。近年来,随着对特应性皮炎研究的深入,分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)和Wnt信号通路在特应性皮炎中的作用逐渐受到关注。本文概要介绍SFRP5和Wnt信号通路在特应性皮炎中的研究进展,探讨特应性皮炎可能的发病机制及潜在的治疗靶点。展开更多
基金supported by the National Science and Technology Major Project "Creation of Major New Drugs", 2008ZX09305-001
文摘Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developmental toxicity of BCDMH on zebrafish embryos and the dose-effect relationship was determined.The effect of BCDMH exposure on histopathology and tissue antioxidant activity of adult zebrafish were observed over time.Results Exposure to 4 mg/L BCDMH post-fertilization was sufficient to induce a number of developmental malformations,such as edema,axial malformations,and reductions in heart rate and hatching rate.The no observable effects concentration of BCDMH on zebrafish embryo was 0.5 mg/L.After 96 h exposure,the 50% lethal concentration （95% confidence interval （CI）） of BCDMH on zebrafish embryo was 8.10 mg/L （6.15-11.16 mg/L）.The 50% inhibitory concentration （95% CI） of BCDMH on hatching rate was 7.37 mg/L （6.33-8.35 mg/L）.Histopathology showed two types of responses induced by BCDMH,defensive and compensatory.The extreme responses were marked hyperplasia of the gill epithelium with lamellar fusion and epidermal peeling.The histopathologic changes in the gills after 10 days exposure were accompanied by significantly higher catalase activity and lipid peroxidation.Conclusion These results have important implications for studies on the toxicity and use of BCDMH and its analogs.
基金Sponsored by Key Subject Foundation of Beijing Municipal(XK100070530)
文摘In this paper single crystals of 3-allyl-5,5-dimethylhydantoin（ADMH）have successfully extracted through recrystallization from a mixture solvents of dichloromethane and petroleum ether.By using single-crystal X-ray diffraction technique,its crystal structure has been determined to belong to monoclinic system,with space group P2（1）/n,a=0.599 53（12）,b=0.983 7（2）,c=1.529 0（3）nm,β=100.43（3）°,V=0.886 9（3）nm3,Z=4,Dc=1.260 g/cm3,F（000）=360,μ（MoKα）=0.092 mm-1,Mr=168.20,R=0.042 2 and wR=0.108 5 for 1 755 observed reflections（I〉2σ（I））.Also,its chemical formula has been confirmed as C8H12N2O2.Results of crystal structures determination for the compound show that the bond of N（1）-C（2）has a double-bond characteristic and there are intermolecular hydrogen bonds.This crystal exists in the form of dimers,in which the two constituent ADMH molecules build into an H-bond-centered symmetric pattern.
基金the Science and Technology Department of Jiangsu Province of China(No.BY2014023-09)the Graduate Student Innovation Plan of Jiangsu Province of China(No.KYLX_1139)the Project for Jiangsu Scientific and Technological Innovation Team,China
文摘The efficient and regenerable antibacterial properties of Nhalamines make them an ideal candidate for parapretion of antimicrobial textiles. In this study,a 5,5-dimethylhydantoin-based reactive N-halamine precursor, 4-( 4-( 3-( 3-hydroxypropyl)-5,5-dimethylhydantoin)-6-chloro-1,3,5-triazinylamino)-benzenesulfonate( HTB), was synthesized and characterized by ~1H-NMR. The synthesized compound was coated to cotton fabrics via reactive dye dyeing process. The coated cotton showed excellent antimicrobial activities against S. aureus( Gram-positive) and E. coli O157: H7( Gram-negative) with short contact times after exposing to diluted household bleach. The treatment method used in this study has a small effect on the tensile strength of cotton fabrics. The durability and regenerability of the chlorinated cotton samples were tested.Although the chlorine content decreased towards washing and storage,almost all of the initial oxidative chlorine levels could be regained after rechlorination.
文摘目的:研究长链非编码RNA(lncRNA)生长阻滞特异性转录物5(GAS5)基因多态性与多囊卵巢综合征(PCOS)发病的关联性。方法:选取2018年5月~2019年5月在广西右江民族医学院附属医院生殖医学中心确诊的236例PCOS患者作为病例组,同时选取同期性别、年龄相匹配的277例健康女性作为对照组,采用iMLDR单核苷酸多态性(SNP)分型方法检测GAS5基因rs145204276 I/D、rs55829688 C/T和rs6790 G/A位点基因型。采用logistic回归分析GAS5基因多态性与PCOS的相关性。结果:GAS5基因rs145204276 I/D位点多态性在对照组和PCOS组之间差异有统计学意义,logistic回归分析结果显示,与I/I基因型相比,I/D和D/D基因型以及显性模型I/D+D/D具有较低的PCOS发病风险[I/D vs I/I:OR(95%CI)=0.61(0.42,0.88),P=0.009;D/D vs I/I:OR(95%CI)=0.44(0.23,0.84),P=0.013;I/D+D/D vs I/I:OR(95%CI)=0.57(0.40,0.81),P=0.002];与I等位基因相比,D等位基因显著降低PCOS的发病风险[D vs I:OR(95%CI)=0.62(0.47,0.82),P=0.001]。rs55829688 C/T和rs6790 G/A位点多态性在对照组和PCOS组之间比较差异均无统计学意义(P>0.05)。单倍型联合分析显示D-T-A单倍型在对照组和PCOS组间的分布差异有统计学意义[OR(95%CI)=0.61(0.45,0.84),P=0.002]。结论:GAS5基因rs145204276 I/D位点多态性可能与PCOS遗传易感性相关,即携带D等位基因的个体可能具有较低的PCOS发病风险。
文摘特应性皮炎是一种常见的慢性炎症性皮肤病,其发病机制复杂,涉及免疫调节异常、皮肤屏障功能障碍和神经免疫相互作用等多个方面。近年来,随着对特应性皮炎研究的深入,分泌型卷曲相关蛋白5(secreted frizzled-related protein 5,SFRP5)和Wnt信号通路在特应性皮炎中的作用逐渐受到关注。本文概要介绍SFRP5和Wnt信号通路在特应性皮炎中的研究进展,探讨特应性皮炎可能的发病机制及潜在的治疗靶点。
