The uterine tetanic contraction and uterine artery blood flow reduction are possible reasons for primary dysmenorrhea(PD). In the present study, we aimed to evaluate the uterine relaxant effect and the influence on ut...The uterine tetanic contraction and uterine artery blood flow reduction are possible reasons for primary dysmenorrhea(PD). In the present study, we aimed to evaluate the uterine relaxant effect and the influence on uterine artery blood velocity of Ge-Gen Decoction(GGD), a well-known Chinese herbal formula. In female ICR mice, uterine contraction was induced by oxytocin exposure following estradiol benzoate pretreatment, and the uterine artery blood velocity was detected by Doppler ultrasound. Histopathological examination of the uterine tissue samples were performed by H&E staining. Ex vivo studies demonstrated that oxytocin, posterior pituitary, or acetylcholine induced contractions in isolated mouse uterus. GGD inhibited both spontaneous and stimulated contractions. In vivo study demonstrated that GGD significantly reduced oxytocin-induced writhing responses with a maximal inhibition of 87%. Further study demonstrated that GGD normalized oxytocin-induced abnormalities of prostaglandins F_2 alpha(PGF_(2α)) and Ca^(2+) in mice. In addition, injection of oxytocin induced a decrease in uterine artery blood flow velocity. Pretreatment with GGD reversed the oxytocin response on blood flow velocity. Histopathological examination showed pretreatment with GGD alleviated inflammation and edema in the uterus when compared with the model group. Both ex vivo and in vivo results indicated that GGD possessed a significant spasmolytic effect on uterine tetanic contraction as well as improvement on uterine artery blood velocity which may involve PGF_(2α) and Ca^(2+) signaling, suggesting that GGD may have a clinic potential in PD therapy.展开更多
目的构建白念珠菌RAD23高表达菌株,探索其高表达对细胞耐受遗传毒性试剂胁迫的影响。方法采用瞬时CRISPR/Cas9系统,分别于体外扩增Cas9基因、sgRNA以及含MET3启动子的修复DNA,通过醋酸锂法转化白念珠菌野生型菌株,于SD-Ura-Met-Cys培养...目的构建白念珠菌RAD23高表达菌株,探索其高表达对细胞耐受遗传毒性试剂胁迫的影响。方法采用瞬时CRISPR/Cas9系统,分别于体外扩增Cas9基因、sgRNA以及含MET3启动子的修复DNA,通过醋酸锂法转化白念珠菌野生型菌株,于SD-Ura-Met-Cys培养基筛选转化子,通过菌落PCR验证基因型,通过Western blot检测Rad23相对表达量,利用平板表型试验检测RAD23高表达对细胞耐受遗传毒性试剂的影响。结果成功构建了RAD23高表达菌株;与野生型菌株相比,高表达菌株中RAD23蛋白相对表达量约为野生型菌株的7倍(10.20 VS 1.46);在UV胁迫条件下,RAD23高表达菌株存活率显著下降(与野生型菌株相比,下降约1 000倍)。结论利用CRISPR/Cas9系统快速构建了白念珠菌RAD23高表达菌株,且RAD23高表达会抑制细胞对遗传毒性试剂UV的耐受能力。展开更多
基金supported by a grant from Ministry of Education,the New Teachers’Fund for Ph.D Stations(Program No.20110096120011)2011’Program for Excellent Scientific and Technological Innovation Team of Jiangsu Higher Education
文摘The uterine tetanic contraction and uterine artery blood flow reduction are possible reasons for primary dysmenorrhea(PD). In the present study, we aimed to evaluate the uterine relaxant effect and the influence on uterine artery blood velocity of Ge-Gen Decoction(GGD), a well-known Chinese herbal formula. In female ICR mice, uterine contraction was induced by oxytocin exposure following estradiol benzoate pretreatment, and the uterine artery blood velocity was detected by Doppler ultrasound. Histopathological examination of the uterine tissue samples were performed by H&E staining. Ex vivo studies demonstrated that oxytocin, posterior pituitary, or acetylcholine induced contractions in isolated mouse uterus. GGD inhibited both spontaneous and stimulated contractions. In vivo study demonstrated that GGD significantly reduced oxytocin-induced writhing responses with a maximal inhibition of 87%. Further study demonstrated that GGD normalized oxytocin-induced abnormalities of prostaglandins F_2 alpha(PGF_(2α)) and Ca^(2+) in mice. In addition, injection of oxytocin induced a decrease in uterine artery blood flow velocity. Pretreatment with GGD reversed the oxytocin response on blood flow velocity. Histopathological examination showed pretreatment with GGD alleviated inflammation and edema in the uterus when compared with the model group. Both ex vivo and in vivo results indicated that GGD possessed a significant spasmolytic effect on uterine tetanic contraction as well as improvement on uterine artery blood velocity which may involve PGF_(2α) and Ca^(2+) signaling, suggesting that GGD may have a clinic potential in PD therapy.
文摘目的构建白念珠菌RAD23高表达菌株,探索其高表达对细胞耐受遗传毒性试剂胁迫的影响。方法采用瞬时CRISPR/Cas9系统,分别于体外扩增Cas9基因、sgRNA以及含MET3启动子的修复DNA,通过醋酸锂法转化白念珠菌野生型菌株,于SD-Ura-Met-Cys培养基筛选转化子,通过菌落PCR验证基因型,通过Western blot检测Rad23相对表达量,利用平板表型试验检测RAD23高表达对细胞耐受遗传毒性试剂的影响。结果成功构建了RAD23高表达菌株;与野生型菌株相比,高表达菌株中RAD23蛋白相对表达量约为野生型菌株的7倍(10.20 VS 1.46);在UV胁迫条件下,RAD23高表达菌株存活率显著下降(与野生型菌株相比,下降约1 000倍)。结论利用CRISPR/Cas9系统快速构建了白念珠菌RAD23高表达菌株,且RAD23高表达会抑制细胞对遗传毒性试剂UV的耐受能力。
