Objective To explore the major compound in Polygonati Rhizoma(Huang Jing,黄精)for quality control.Methods The major compound was isolated and analyzed by liquid chromatography-mass spectrometry(LC-MS),and subsequently...Objective To explore the major compound in Polygonati Rhizoma(Huang Jing,黄精)for quality control.Methods The major compound was isolated and analyzed by liquid chromatography-mass spectrometry(LC-MS),and subsequently further identified by nuclear magnetic resonance(NMR).Thin layer chromatography(TLC)was optimized based on the previous methods reported in the Chinese Pharmacopeia(2015 edition).Results The major compound was isolated from the natural material and identified as linoleic acid.A high performance liquid chromatography(HPLC)method with robust linearity(R2=0.9997),specificity,precision,stability,repeatability and recovery was developed for linoleic acid determination.TLC chromatogram was improved significantly after optimization for qualitative analysis.Conclusions The optimized TLC method is practical and can be adopted for quality control of Polygonati Rhizoma(Huang Jing,黄精).The levels of linoleic acid vary between species of Polygonati Rhizoma(Huang Jing,黄精),with Polygonatum cyrtonema Hua(Jiang Xing Huang Jing,姜型黄精)showing the highest contents.This study provides valuable information for quality control of Polygonati Rhizoma(Huang Jing,黄精).展开更多
Background Seventeen million births occur in China each year. Neonatal mortality is the leading cause of under 5-year-old child deaths, and intrapartum-related injury accounts for much of mental retardation in young c...Background Seventeen million births occur in China each year. Neonatal mortality is the leading cause of under 5-year-old child deaths, and intrapartum-related injury accounts for much of mental retardation in young children. The Chinese Ministry of Health sought to improve infant and child survival through a nationwide initiative to have at least one person trained in neonatal resuscitation at every birth. The aim of the current study was to evaluate the impact of China Neonatal Resuscitation Program （NRP） on policy and infrastructure changes and its effectiveness in decreasing the incidence of mortality among newborn infants. Methods The Chinese NRP incorporated policy change, professional education, and creation of a sustainable health system infrastructure for resuscitation. Multidisciplinary teams from all 31 provinces and municipal states disseminated NRP in a train-the-trainer cascade. The intervention targeted 20 provinces with high neonatal mortality and programs to reduce maternal mortality. Program evaluation data came from 322 representative hospitals in those provinces. Results Changes in policy permitted midwives to initiate resuscitation and required resuscitation training for licensure. From 2004 through 2009 more than 110 659 professionals received NRP training in the 20 target provinces, with 94% of delivery facilities and 99% of counties reached. Intrapartum-related deaths in the delivery room decreased from 7.5 to 3.4 per 10 000 from 2003 to 2008, and the incidence of Apgar 〈7 at 1 minute decreased from 6.3% to 2.9%. Conclusions The Chinese NRP achieved policy changes promoting resuscitation, trained large numbers of professionals, and contributed to reduction in delivery room mortality. Improved adherence to the resuscitation algorithm, extension of training to the township level, and coverage of births now occurring outside health facilities can further increase the number of lives saved.展开更多
目的研究土家族药物扣子七Panax japonicus var. major中三萜皂苷类成分,对其抑制肿瘤细胞增殖活性进行筛选,并初步探讨化合物结构与活性的关系。方法应用多种色谱方法对土家族药物扣子七正丁醇部位进行分离,所分离化合物运用核磁共振...目的研究土家族药物扣子七Panax japonicus var. major中三萜皂苷类成分,对其抑制肿瘤细胞增殖活性进行筛选,并初步探讨化合物结构与活性的关系。方法应用多种色谱方法对土家族药物扣子七正丁醇部位进行分离,所分离化合物运用核磁共振方法进行结构鉴定,应用MTT法测定分离化合物对体外培养人肿瘤细胞增殖的影响。结果从扣子七根茎正丁醇部位分离得到14个三萜皂苷,分别鉴定为竹节参皂苷IVa甲酯(1)、竹节参皂苷Ⅳa丁酯(2)、竹节参皂苷Ⅳ(3)、竹节参皂苷Ⅳa(4)、28-去糖竹节参皂苷Ⅳa(5)、齐墩果酸-3-O-β-D-(6′-甲酯)-吡喃葡萄糖醛酸苷(6)、(24R)-珠子参苷R1(7)、(24R)-拟人参皂苷F11(8)、(20S)-三七皂苷R2(9)、(20S)-人参皂苷Rg2(10)、人参皂苷Rg1(11)、人参皂苷Re(12)、人参皂苷Rd(13)、竹节参皂苷V甲酯(14)。活性研究结果显示,化合物5和6对胃癌BGC-823细胞、结肠癌HCT-116细胞、宫颈癌HeLa细胞及肝癌Hep G2细胞均显示了较强的活性,呈良好的剂量依赖关系,其中化合物5对BGC-823、HCT-116细胞的IC50分别为9.94、14.17μmol/L,化合物6对肝癌HepG2细胞的抑制作用最强(IC50=12.70μmol/L)。结论首次从扣子七中分离得到化合物6并报道了其光谱数据;其部分化学成分显示出抗肿瘤活性,其抗肿瘤活性与齐墩果烷型皂苷密切相关,且活性强弱可能与C-28取代基有关联,相关抗肿瘤机制值得进一步研究。展开更多
基金supported by grants from The National Natural Science Foundation of China (81774362, 81303004)The Natural Science Foundation of Hunan Province (2018JJ2290)
基金We thank for the funding support from the National Standardization Construction in TCMs of China(No.ZYBZH-Y-HUN-23)National Key Research and Development Projects of China(No.2018YFC1707903)Key Research and Development Projects of Hunan Province(No.2018SK2119).
文摘Objective To explore the major compound in Polygonati Rhizoma(Huang Jing,黄精)for quality control.Methods The major compound was isolated and analyzed by liquid chromatography-mass spectrometry(LC-MS),and subsequently further identified by nuclear magnetic resonance(NMR).Thin layer chromatography(TLC)was optimized based on the previous methods reported in the Chinese Pharmacopeia(2015 edition).Results The major compound was isolated from the natural material and identified as linoleic acid.A high performance liquid chromatography(HPLC)method with robust linearity(R2=0.9997),specificity,precision,stability,repeatability and recovery was developed for linoleic acid determination.TLC chromatogram was improved significantly after optimization for qualitative analysis.Conclusions The optimized TLC method is practical and can be adopted for quality control of Polygonati Rhizoma(Huang Jing,黄精).The levels of linoleic acid vary between species of Polygonati Rhizoma(Huang Jing,黄精),with Polygonatum cyrtonema Hua(Jiang Xing Huang Jing,姜型黄精)showing the highest contents.This study provides valuable information for quality control of Polygonati Rhizoma(Huang Jing,黄精).
文摘Background Seventeen million births occur in China each year. Neonatal mortality is the leading cause of under 5-year-old child deaths, and intrapartum-related injury accounts for much of mental retardation in young children. The Chinese Ministry of Health sought to improve infant and child survival through a nationwide initiative to have at least one person trained in neonatal resuscitation at every birth. The aim of the current study was to evaluate the impact of China Neonatal Resuscitation Program （NRP） on policy and infrastructure changes and its effectiveness in decreasing the incidence of mortality among newborn infants. Methods The Chinese NRP incorporated policy change, professional education, and creation of a sustainable health system infrastructure for resuscitation. Multidisciplinary teams from all 31 provinces and municipal states disseminated NRP in a train-the-trainer cascade. The intervention targeted 20 provinces with high neonatal mortality and programs to reduce maternal mortality. Program evaluation data came from 322 representative hospitals in those provinces. Results Changes in policy permitted midwives to initiate resuscitation and required resuscitation training for licensure. From 2004 through 2009 more than 110 659 professionals received NRP training in the 20 target provinces, with 94% of delivery facilities and 99% of counties reached. Intrapartum-related deaths in the delivery room decreased from 7.5 to 3.4 per 10 000 from 2003 to 2008, and the incidence of Apgar 〈7 at 1 minute decreased from 6.3% to 2.9%. Conclusions The Chinese NRP achieved policy changes promoting resuscitation, trained large numbers of professionals, and contributed to reduction in delivery room mortality. Improved adherence to the resuscitation algorithm, extension of training to the township level, and coverage of births now occurring outside health facilities can further increase the number of lives saved.
文摘目的研究土家族药物扣子七Panax japonicus var. major中三萜皂苷类成分,对其抑制肿瘤细胞增殖活性进行筛选,并初步探讨化合物结构与活性的关系。方法应用多种色谱方法对土家族药物扣子七正丁醇部位进行分离,所分离化合物运用核磁共振方法进行结构鉴定,应用MTT法测定分离化合物对体外培养人肿瘤细胞增殖的影响。结果从扣子七根茎正丁醇部位分离得到14个三萜皂苷,分别鉴定为竹节参皂苷IVa甲酯(1)、竹节参皂苷Ⅳa丁酯(2)、竹节参皂苷Ⅳ(3)、竹节参皂苷Ⅳa(4)、28-去糖竹节参皂苷Ⅳa(5)、齐墩果酸-3-O-β-D-(6′-甲酯)-吡喃葡萄糖醛酸苷(6)、(24R)-珠子参苷R1(7)、(24R)-拟人参皂苷F11(8)、(20S)-三七皂苷R2(9)、(20S)-人参皂苷Rg2(10)、人参皂苷Rg1(11)、人参皂苷Re(12)、人参皂苷Rd(13)、竹节参皂苷V甲酯(14)。活性研究结果显示,化合物5和6对胃癌BGC-823细胞、结肠癌HCT-116细胞、宫颈癌HeLa细胞及肝癌Hep G2细胞均显示了较强的活性,呈良好的剂量依赖关系,其中化合物5对BGC-823、HCT-116细胞的IC50分别为9.94、14.17μmol/L,化合物6对肝癌HepG2细胞的抑制作用最强(IC50=12.70μmol/L)。结论首次从扣子七中分离得到化合物6并报道了其光谱数据;其部分化学成分显示出抗肿瘤活性,其抗肿瘤活性与齐墩果烷型皂苷密切相关,且活性强弱可能与C-28取代基有关联,相关抗肿瘤机制值得进一步研究。
