Islets from RIP-PDE3B mice, exhibiting β-cell specific overexpression of the cAMP/cGMP-degrading enzyme phosphodiesterase 3B (PDE3B) and dysregulated insulin secretion, were subjected to microarray analysis. We show ...Islets from RIP-PDE3B mice, exhibiting β-cell specific overexpression of the cAMP/cGMP-degrading enzyme phosphodiesterase 3B (PDE3B) and dysregulated insulin secretion, were subjected to microarray analysis. We show that osteopontin (OPN) mRNA is increased in a dose-dependent manner in islets from RIP-PDE3B mice, as compared to wild-type islets. In addition, in silico analysis shows that PDE3B and OPN are interacting. Furthermore, OPN interacts with protein kinase CK2 ina distinct submodule of the protein-protein interaction network. We studied PDE3B and OPN proteins and, in some cases, also PDE1B and PDE4C, under conditions of relevance for insulin secretion. In the presence of forskolin, PDE inhibitors, insulin, or a protein kinase CK2 inhibitor, similar alterations in protein levels of PDE3B and OPN are shown. In summary, results from using a number of strategies demonstrate a connection between PDE3B and OPNas well as a role for protein kinase CK2 inpancreatic β-cells.展开更多
为研究2-St age PDE中连续超声速射流及结构参数对撞诱导激波聚焦的影响规律,在冷态条件下开展了2-St age PDE中连续超声速射流对撞诱导激波聚焦的试验。分析了喷口宽度、导流环深度、凹面腔开口端与喷管间距、尾喷管角度、射流入射压...为研究2-St age PDE中连续超声速射流及结构参数对撞诱导激波聚焦的影响规律,在冷态条件下开展了2-St age PDE中连续超声速射流对撞诱导激波聚焦的试验。分析了喷口宽度、导流环深度、凹面腔开口端与喷管间距、尾喷管角度、射流入射压力等参数对凹面腔底部峰值压力的影响。结果表明:喷口宽度、导流环深度、凹面腔开口端与喷口间距、射流入射压力越大,凹面腔底部峰值压力越大,激波聚焦效果越好;尾喷管角度越大,凹面腔底部峰值压力越小,激波聚焦效果越差;喷口宽度、导流环深度、射流入射压力对激波聚焦的影响较大。展开更多
为研究猪链球菌2型(Streptococcus suis serotype 2,SS2)环二腺苷酸(c-di-AMP)水解蛋白GdpP的生化特性,根据已公布的SS2中国强致病株98HAH33全基因组中的gdpP序列信息设计引物,以SS2强致病株HA9801基因组为模板,通过PCR方法克隆获得了SS...为研究猪链球菌2型(Streptococcus suis serotype 2,SS2)环二腺苷酸(c-di-AMP)水解蛋白GdpP的生化特性,根据已公布的SS2中国强致病株98HAH33全基因组中的gdpP序列信息设计引物,以SS2强致病株HA9801基因组为模板,通过PCR方法克隆获得了SS2的c-di-AMP水解蛋白基因gdpP完整序列,其阅读框由1 965个核苷酸组成,编码654个氨基酸。应用大肠杆菌重组表达系统,表达、纯化了GdpP,进而分析了其体外生物活性,结果显示纯化的重组蛋白可以在体外水解c-di-AMP形成pApA。其水解酶活性在碱性环境条件下(pH 8.0)相对较强,而在酸性环境下(pH 6.0,6.5)未检测到活性;同时,水解酶活性还依赖于二价金属离子Mg2+、Mn2+以及Co2+的存在,且在Mn2+存在的条件下相对活性最强,而在Ca2+、Fe2+和Cu2+存在的条件下则均未表现出活性。上述结果为进一步深入研究c-di-AMP在猪链球菌2型中发挥的生物学功能奠定了基础。展开更多
目的:探讨西地那非联合苁蓉益肾颗粒治疗2型糖尿病性勃起功能障碍(erectile dysfunction,ED)的疗效及安全性分析。方法:将70例二甲双胍药物控制的2型糖尿病性ED患者随机分为A、B两组,A组35例,服用西地那非;B组35例,联合服用西地那非和...目的:探讨西地那非联合苁蓉益肾颗粒治疗2型糖尿病性勃起功能障碍(erectile dysfunction,ED)的疗效及安全性分析。方法:将70例二甲双胍药物控制的2型糖尿病性ED患者随机分为A、B两组,A组35例,服用西地那非;B组35例,联合服用西地那非和苁蓉益肾颗粒,两组均治疗4周。分别对治疗前后国际勃起功能指数-5评分(international index of erectile function,IIEF-5)、每周性交频率、夫妻双方性生活满意程度进行统计分析,并观察两组患者治疗期间的不良反应。结果:A、B两组在IIEF-5评分、每周性交频率、夫妻双方性生活满意程度方面均较治疗前增加,差异具有统计学意义(P<0.05),但B组治疗后在IIEF-5评分、夫妻双方性生活满意程度高于A组治疗后,差异具有统计学意义(P<0.05)。两组患者治疗期间未发生严重不良反应。结论:西地那非联合苁蓉益肾颗粒治疗2型糖尿病性ED较单用西地那非可显著改善患者的勃起功能,提高夫妻性生活质量,安全、有效。展开更多
文摘Islets from RIP-PDE3B mice, exhibiting β-cell specific overexpression of the cAMP/cGMP-degrading enzyme phosphodiesterase 3B (PDE3B) and dysregulated insulin secretion, were subjected to microarray analysis. We show that osteopontin (OPN) mRNA is increased in a dose-dependent manner in islets from RIP-PDE3B mice, as compared to wild-type islets. In addition, in silico analysis shows that PDE3B and OPN are interacting. Furthermore, OPN interacts with protein kinase CK2 ina distinct submodule of the protein-protein interaction network. We studied PDE3B and OPN proteins and, in some cases, also PDE1B and PDE4C, under conditions of relevance for insulin secretion. In the presence of forskolin, PDE inhibitors, insulin, or a protein kinase CK2 inhibitor, similar alterations in protein levels of PDE3B and OPN are shown. In summary, results from using a number of strategies demonstrate a connection between PDE3B and OPNas well as a role for protein kinase CK2 inpancreatic β-cells.
文摘为研究2-St age PDE中连续超声速射流及结构参数对撞诱导激波聚焦的影响规律,在冷态条件下开展了2-St age PDE中连续超声速射流对撞诱导激波聚焦的试验。分析了喷口宽度、导流环深度、凹面腔开口端与喷管间距、尾喷管角度、射流入射压力等参数对凹面腔底部峰值压力的影响。结果表明:喷口宽度、导流环深度、凹面腔开口端与喷口间距、射流入射压力越大,凹面腔底部峰值压力越大,激波聚焦效果越好;尾喷管角度越大,凹面腔底部峰值压力越小,激波聚焦效果越差;喷口宽度、导流环深度、射流入射压力对激波聚焦的影响较大。
文摘目的:探讨西地那非联合苁蓉益肾颗粒治疗2型糖尿病性勃起功能障碍(erectile dysfunction,ED)的疗效及安全性分析。方法:将70例二甲双胍药物控制的2型糖尿病性ED患者随机分为A、B两组,A组35例,服用西地那非;B组35例,联合服用西地那非和苁蓉益肾颗粒,两组均治疗4周。分别对治疗前后国际勃起功能指数-5评分(international index of erectile function,IIEF-5)、每周性交频率、夫妻双方性生活满意程度进行统计分析,并观察两组患者治疗期间的不良反应。结果:A、B两组在IIEF-5评分、每周性交频率、夫妻双方性生活满意程度方面均较治疗前增加,差异具有统计学意义(P<0.05),但B组治疗后在IIEF-5评分、夫妻双方性生活满意程度高于A组治疗后,差异具有统计学意义(P<0.05)。两组患者治疗期间未发生严重不良反应。结论:西地那非联合苁蓉益肾颗粒治疗2型糖尿病性ED较单用西地那非可显著改善患者的勃起功能,提高夫妻性生活质量,安全、有效。
