Objective To establish a rapid,sensitive and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of acyclovir (the metabolite of valacyclovir hydrochloride) in human plasma...Objective To establish a rapid,sensitive and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of acyclovir (the metabolite of valacyclovir hydrochloride) in human plasma. Methods After addition of ganciclovir as internal standard (IS),plasma samples were prepared by one-step protein precipitation using acetonitrile as precipitant,followed by an isocratic elution with 0.1% formic acid solution-methanol (95∶5,v/v) on an Agilent ZORBAX SB-C18 (150mm×2.1mm i.d.,3.5μm) column. Detection was performed on a triple-quadrupole mass spectrometer utilizing electrospray ionization (ESI) interface operating in positive ion and selected reaction monitoring (SRM) mode with the precursor to product ion transitions m/z 226.2→152.1 for acyclovir and m/z 256.2→152.1 for the IS. Results The analytical results demonstrated a good linearity over the ranges from 0.005 to 4μg/mL (r=0.9999) for valacyclovir hydrochloride. The relative standard deviations (RSD) of intra-batch and inter-batch were less than 4.06% and 9.23%,respectively. The limit of detection and lower limit of quantification in human plasma were 2ng/mL and 5ng/mL,respectively. Conclusion The method was simple,sensitive,accurate and reproducible and has been successfully applied to a bioequivalence study of valacyclovir hydrochloride capsules in Chinese healthy male volunteers.展开更多
This process describes a novel technique for effective trapping of “Pd” metal through resins during the process development of L-valine, 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl) methoxy] ethyl ester, and mono hy...This process describes a novel technique for effective trapping of “Pd” metal through resins during the process development of L-valine, 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl) methoxy] ethyl ester, and mono hydrochloride known as a Valacyclovir hydrochloride (1). This technique is suitable for large-scale production of 1 and it is described here Pd metal trapping by using different resins.展开更多
目的:探讨伐昔洛韦联合胎盘多肽注射液治疗复发性生殖器疱疹患者对炎性因子、免疫功能的影响。方法:将81例复发性生殖器疱疹患者随机分成观察组41例与对照组40例,两组患者均给予盐酸伐昔洛韦片口服,2次/d,0.3g/次,连续服用4周。观察组...目的:探讨伐昔洛韦联合胎盘多肽注射液治疗复发性生殖器疱疹患者对炎性因子、免疫功能的影响。方法:将81例复发性生殖器疱疹患者随机分成观察组41例与对照组40例,两组患者均给予盐酸伐昔洛韦片口服,2次/d,0.3g/次,连续服用4周。观察组在此基础上加用胎盘多肽注射液氯化钠注射液250m L静滴。比较两组患者治疗前后炎性因子、免疫功能变化以及临床疗效。结果:观察组治疗后IL-2、TNF-γ、CD4+、CD4+/CD8+均显著高于对照组(41.52±4.79 vs 22.03±2.31,12.62±2.85 vs 4.98±2.24,37.58±8.15 vs 32.16±3.85,1.32±0.26 vs 1.03±0.37),CD8+明显低于对照组(28.40±3.82 vs 30.82±4.64);治疗有效率明显高于对照组(95.12%vs 70.73%)。结论:昔洛韦联合胎盘多肽注射液有利于改善患者炎性症状和免疫功能,提高治疗效果。展开更多
文摘Objective To establish a rapid,sensitive and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of acyclovir (the metabolite of valacyclovir hydrochloride) in human plasma. Methods After addition of ganciclovir as internal standard (IS),plasma samples were prepared by one-step protein precipitation using acetonitrile as precipitant,followed by an isocratic elution with 0.1% formic acid solution-methanol (95∶5,v/v) on an Agilent ZORBAX SB-C18 (150mm×2.1mm i.d.,3.5μm) column. Detection was performed on a triple-quadrupole mass spectrometer utilizing electrospray ionization (ESI) interface operating in positive ion and selected reaction monitoring (SRM) mode with the precursor to product ion transitions m/z 226.2→152.1 for acyclovir and m/z 256.2→152.1 for the IS. Results The analytical results demonstrated a good linearity over the ranges from 0.005 to 4μg/mL (r=0.9999) for valacyclovir hydrochloride. The relative standard deviations (RSD) of intra-batch and inter-batch were less than 4.06% and 9.23%,respectively. The limit of detection and lower limit of quantification in human plasma were 2ng/mL and 5ng/mL,respectively. Conclusion The method was simple,sensitive,accurate and reproducible and has been successfully applied to a bioequivalence study of valacyclovir hydrochloride capsules in Chinese healthy male volunteers.
文摘This process describes a novel technique for effective trapping of “Pd” metal through resins during the process development of L-valine, 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl) methoxy] ethyl ester, and mono hydrochloride known as a Valacyclovir hydrochloride (1). This technique is suitable for large-scale production of 1 and it is described here Pd metal trapping by using different resins.
文摘目的:探讨伐昔洛韦联合胎盘多肽注射液治疗复发性生殖器疱疹患者对炎性因子、免疫功能的影响。方法:将81例复发性生殖器疱疹患者随机分成观察组41例与对照组40例,两组患者均给予盐酸伐昔洛韦片口服,2次/d,0.3g/次,连续服用4周。观察组在此基础上加用胎盘多肽注射液氯化钠注射液250m L静滴。比较两组患者治疗前后炎性因子、免疫功能变化以及临床疗效。结果:观察组治疗后IL-2、TNF-γ、CD4+、CD4+/CD8+均显著高于对照组(41.52±4.79 vs 22.03±2.31,12.62±2.85 vs 4.98±2.24,37.58±8.15 vs 32.16±3.85,1.32±0.26 vs 1.03±0.37),CD8+明显低于对照组(28.40±3.82 vs 30.82±4.64);治疗有效率明显高于对照组(95.12%vs 70.73%)。结论:昔洛韦联合胎盘多肽注射液有利于改善患者炎性症状和免疫功能,提高治疗效果。
