丹酚酸组分中各代表性成分药效贡献率的评价及其油水分配系数的整合表征

该实验利用人脐静脉内皮细胞氧化损伤实验、家兔体外凝血4项实验和大鼠心肌缺血实验相结合的方法比较了丹酚酸组分中3个代表性成分的药效活性的差异,并利用CRITIC权重法评价代表性成分的药效贡献率;结果得到丹酚酸组分中代表性成分丹酚酸B、迷迭香酸、丹参素的贡献率分别为28.85%,30.11%,41.04%。采用摇瓶法测定了丹酚酸组分在水以及不同p H缓冲液中的油水分配系数,进一步以质量权重系数和药效贡献率相结合的方法整合表征了该组分整体的油水分配系数,结果表明丹酚酸组分在正辛醇-水/p H 1.2的盐酸溶液/p H 2.0,2.5,5.0,5.8,6.8,7.4,7.8的磷酸盐缓冲液中表观油水分配系数0.32,1.06,0.89,0.98,0.90,0.13,0.02,0.20,0.56。该实验为组分整体性质的表征提供了一定的参考。     

鸦胆子油的研究进展

鸦胆子油是一种疗效确切，毒副作用小的抗肿瘤药物，在临床上有着广阔的发展前景。对鸦胆子油的化学成分、提取方法、含量测定、药理学及临床应用等几方面进行了综述，为鸦胆子油的进一步研究提供参考。     

HPLC法测定龙马腰痛胶囊毒性成分含量的研究

目的:对龙马腰痛胶囊组方中制川乌、制马钱子毒性成分的含量进行测定,为修订该制剂标准提供依据.方法:采用高效液相色谱(HPLC)法对龙马腰痛胶囊中所含双酯型生物碱、士的宁和马钱子碱进行含量测定并确定其限度.结果:龙马腰痛胶囊每粒含双酯型生物碱总量≤0.15 mg,士的宁含量为0.886～2.75 mg,马钱子碱含量为0....     

红果山胡椒叶挥发油化学成分的GC-MS分析

目的利用气相色谱-质谱（GC-MS）联用技术对红果山胡椒干燥叶挥发油的化学成分进行分析鉴定。方法采用水蒸汽蒸馏法从红果山胡椒干燥叶中提取挥发油,用气相色谱-质谱仪对化学成分进行鉴定。结果共分离出74种化学成分,鉴定了其中的53种化学成分,占总峰面积的96.07%。结论红果山胡椒叶中含量相对较高的是橙花叔醇、石竹烯、（＋）-δ-杜松烯、β-蒎烯、（＋）-香橙烯、顺式金合欢醇等,其中橙花叔醇的含量达28.09%,方法稳定性、重现性较好。     

逍遥散类方及其分离组分抗抑郁作用的筛选研究

目的:研究比较逍遥散类方及其分离组分的抗抑郁作用,筛选最佳的抗抑郁复方及分离组分。方法:首先,以传统中药复方逍遥散、丹栀逍遥散、柴胡疏肝散水煎剂和阳性药(文拉法辛)为干预药物,采用大鼠强迫游泳实验评价各组药效。其次,将逍遥散、丹栀逍遥散和柴胡疏肝散复方及其分离所得的6个不同极性的组份,采用体外活性筛选实验,考察各复方及其分离组份对大鼠脑突触体摄取5-羟色胺(5-HT)、去甲肾上腺素(NA)和多巴胺(DA)的抑制作用。结果:与空白对照组比较,逍遥散水煎剂组、柴胡疏肝散水煎剂组、文拉法辛组均能够不同程度地缩短大鼠强迫游泳不动时间(P<0.05)。在待测样品的终反应浓度为10μg/mL的条件下,逍遥散水煎剂组X1、逍遥散分离组分X6、X7对大鼠脑突触体摄取单胺类神经递质有明显的抑制作用。结论:逍遥散及其分离组分X6、X7表现出良好的抗抑郁作用,可以作为筛选抗抑郁新药的理想组份。     

PGRMC1在激素治疗中促进乳腺癌细胞增殖的机制研究

目的 探讨孕激素受体膜组分1（progesterone receptor membrane components 1,PGRMC1）在激素治疗中促进乳腺癌细胞增殖的作用机制。 方法 雌激素受体（estrogen receptor,ER）阳性的乳腺癌MCF7细胞经雌孕激素处理后,用过表达PGRMC1、敲降ER抑制因子PHB1（shPHB1-1和shPHB1-2）及其相应阴性对照的慢病毒液进行感染。采用免疫共沉淀联合质谱分析及GST pull-down实验检测PGRMC1与PHB复合体（PHB1和PHB2）的相互作用,免疫印迹法和RT-qPCR检测PHB1、PHB2和PGRMC1的表达情况,CCK-8和EDU实验检测细胞的增殖能力,流式细胞术检测细胞周期情况,RT-qPCR检测ER信号通路下游靶基因THBS1、CXCL12和GREB1的表达情况。结果 免疫共沉淀联合质谱分析发现,PHB1和PHB2均存在于PGRMC1的免疫共沉淀组分中;GST pull-down鉴定体外条件下PGRMC1与PHB复合体存在直接相互作用。与相应对照组相比,过表达PGRMC1和下调PHB1的乳腺癌细胞增殖速度均明显加快（均P<0.05）,S期和G2/M期阳性细胞比例均明显增加（均P<0.05）,且能够显著促进ER信号通路下游靶基因THBS1、CXCL12和GREB1的表达（均P<0.01）。PGRMC1过表达后MCF7细胞中PHB1与ER的相互作用减弱。下调PHB1后再过表达PGRMC1的细胞周期中,S期和G2/M期阳性细胞比例与单独下调PHB1相比无明显变化（均P>0.05）。结论 PGRMC1可能通过与PHB复合体结合,并解除后者对ER信号通路的抑制作用,从而促进ER信号通路的活化和下游靶基因的表达,加速激素刺激条件下乳腺癌细胞的恶性增殖。     

DDSM: Design-Oriented Dual-Scale Shape-Material Model for Lattice Material Components

This paper proposes a new CAD model for the design of lattice material components. The CAD model better captures the user’s design intent and provides a dual-scale framework to represent the geometry and material distribution. Conventional CAD model formats based on B-Rep generate millions of data files, which also makes design intent and material information missing. In the present work, a new shape-material model for lattice material components is proposed. At the macroscopic scale, a compact face-based non-manifold topological data structure is proposed to express the lattice shape-material information without ambiguity. At the microscopic scale, implicit function is adopted for the representation of lattice material components. Numerical experiments verify that the proposed CAD model provides a powerful support for design intent with minor space costs. Meanwhile, the representation method supports solid modeling queries of geometric and material information on each scale.     

亲和超滤-液质联用技术筛选补骨脂治疗子宫内膜癌的有效成分

目的 采用亲和超滤-液质联用技术筛选补骨脂Psoralea Fructus中治疗子宫内膜癌的潜在活性成分。方法 以表皮生长因子受体（epidermal growth factor receptor erbB1,EGFR）为靶蛋白,将补骨脂水提液和EGFR蛋白液共同孵育,利用基于亲和超滤原理的超速离心法和解离剂对活性配体进行分离和筛选,借助超高效液相色谱-四级杆飞行质谱技术对与EGFR蛋白亲和的补骨脂化学成分进行鉴定,并通过计算结合变化率比较活性成分与蛋白之间的结合能力。结果 共筛选得到4种与EGFR亲和的补骨脂活性成分,通过对结合变化率进行比较,发现psorachalcone A与EGFR蛋白结合变化率最大。结论 该研究为补骨脂防治子宫内膜癌的药效物质基础和作用机制研究提供了理论依据。     

Programmatic adaptations to acute malnutrition screening and treatment during the COVID‐19 pandemic

The COVID‐19 pandemic presented numerous challenges to acute malnutrition screening and treatment. To enable continued case identification and service delivery while minimising transmission risks, many organisations and governments implemented adaptations to community‐based management of acute malnutrition (CMAM) programmes for children under 5. These included: Family mid‐upper arm circumference (MUAC); modified admission and discharge criteria; modified dosage of therapeutic foods; and reduced frequency of follow‐up visits. This paper presents qualitative findings from a larger mixed methods study to document practitioners'' operational experiences and lessons learned from these adaptations. Findings reflect insights from 37 interviews representing 15 organisations in 17 countries, conducted between July 2020 and January 2021. Overall, interviewees indicated that adaptations were mostly well‐accepted by staff, caregivers and communities. Family MUAC filled screening gaps linked to COVID‐19 disruptions; however, challenges included long‐term accuracy of caregiver measurements; implementing an intervention that could increase demand for inconsistent services; and limited guidance to monitor programme quality and impact. Modified admission and discharge criteria and modified dosage streamlined logistics and implementation with positive impacts on staff workload and caregiver understanding of the programme. Reduced frequency of visits enabled social distancing by minimising crowding at facilities and lessened caregivers'' need to travel. Concerns remained about how adaptations impacted children''s identification for and progress through treatment and programme outcomes. Most respondents anticipated reverting to standard protocols once transmission risks were mitigated. Further evidence, including multi‐year programmatic data analysis and rigorous research, is needed in diverse contexts to understand adaptations'' impacts, including how to ensure equity and mitigate unintended consequences.     

开封产紫白菊花脂溶性成分研究

目的对开封产紫白色菊花脂溶性成分进行初步研究。方法采用索氏提取法从紫白色菊花中提取脂溶性成分,用气相色谱-质谱联用检测其化学成分。结果从紫白色菊花中分离出56个化学成分,鉴定了其中的43个,占色谱总馏分出峰面积的83．92％。其中鉴定了18个脂肪酸成分。结论紫白色菊花脂溶性成分中主要为脂肪酸类（34．81％）,其次为烷烃类（29．83％）、萜类（13．39％）、甾醇类（5．89％）。