膜片钳技术研究中钙耐受的心室肌细胞分离方法

目的：探索并建立适合于膜片技术研究的心室肌细胞急性酶分离方法。方法：采用改进的自制的Langendorff心脏灌流系统,用无钙Tyrode液和酶解液逆行主动脉灌流之后,分次剪取心肌组织置于细胞保存液（KB液）中保存以供全细胞膜片钳方式记录膜电位和膜电流。结果：分离所得80%-90%的细胞呈杆状,边缘清楚,表面光滑,纹理清晰,可记录到典型的动作电位。结论：控制好分离心室肌细胞的实验条件以及熟练掌握实验操作的方法,是分离出适合于膜片钳实验的心室肌细胞的重要因素。     

肉豆蔻挥发油对行为绝望抑郁小鼠的影响

目的 观察肉豆蔻挥发油对行为绝望抑郁小鼠的影响并探讨其作用机制.方法 健康雄性昆明种小鼠分为对照组、盐酸氟西汀组、肉豆蔻挥发油高、中、低剂量组,连续灌胃（ig）7d,末次给药0.5 h后通过悬尾实验、强迫游泳实验研究肉豆蔻挥发油的抗抑郁作用,采用酶联免疫法测定小鼠脑内5-羟色胺（5-HT）、多巴胺（DA）、去甲肾上腺素（NE）的含量.结果 与对照组[（82.60±24.70）s]比较,肉豆蔻挥发油中剂量组小鼠悬尾不动的时间[（54.40±15.87）s]显著降低,差异具有统计学意义（P＜0.05）;肉豆蔻挥发油中剂量组小鼠脑内5-HT、DA、NE的含量分别为（19.35±2.79） ng/ml、（12.16±0.71） pg/ml、（0.27±0.12）pg/ml,对照组小鼠脑内三种递质的含量分别为（14.95±4.83） ng/ml、（11.32±0.95） pg/ml、（0.20±0.11）ng/ml,中剂量组5-HT含量显著增高,差异具有统计学意义（P＜0.05）.结论 肉豆蔻挥发油有抗抑郁作用,可能与提高小鼠脑内5-HT、DA、NE的含量有关.     

Modeling spatio-temporal patterns of holistic functional brain networks via multi-head guided attention graph neural networks (Multi-Head GAGNNs)

Mounting evidence has demonstrated that complex brain function processes are realized by the interaction of holistic functional brain networks which are spatially distributed across specific brain regions in a temporally dynamic fashion. Therefore, modeling spatio-temporal patterns of holistic functional brain networks plays an important role in understanding brain function. Compared to traditional modeling methods such as principal component analysis, independent component analysis, and sparse coding, superior performance has been achieved by recent deep learning methodologies. However, there are still two limitations of existing deep learning approaches for functional brain network modeling. They either (1) merely modeled a single targeted network and ignored holistic ones at one time, or (2) underutilized both spatial and temporal features of fMRI during network modeling, and the spatial/temporal accuracy was thus not warranted. To address these limitations, we proposed a novel Multi-Head Guided Attention Graph Neural Network (Multi-Head GAGNN) to simultaneously model both spatial and temporal patterns of holistic functional brain networks. Specifically, a spatial Multi-Head Attention Graph U-Net was first adopted to model the spatial patterns of multiple brain networks, and a temporal Multi-Head Guided Attention Network was then introduced to model the corresponding temporal patterns under the guidance of modeled spatial patterns. Based on seven task fMRI datasets from the public Human Connectome Project and resting state fMRI datasets from the public Autism Brain Imaging Data Exchange I of 1448 subjects, the proposed Multi-Head GAGNN showed superior ability and generalizability in modeling both spatial and temporal patterns of holistic functional brain networks in individual brains compared to other state-of-the-art (SOTA) models. Furthermore, the modeled spatio-temporal patterns of functional brain networks via the proposed Multi-Head GAGNN can better predict the individual cognitive behavioral measures compared to the other SOTA models. This study provided a novel and powerful tool for brain function modeling as well as for understanding the brain-cognitive behavior associations.     

基于HPLC多指标成分定量控制联合化学计量学的山菊降压胶囊质量评价研究

目的建立山菊降压胶囊中多指标成分高效液相色谱测定方法,并联合化学计量学方法对其进行综合质量评价。方法以Eclipse Plus C18柱(250 mm×4.6 mm,5μm)为色谱柱,乙腈–0.1%磷酸为流动相进行梯度洗脱;检测波长分别为340 nm(0～22 min检测牡荆素葡萄糖苷、牡荆素鼠李糖苷和牡荆素)、284 nm(22～41 min检测橙黄决明素、黄决明素和美决明子素)和208 nm(41～75 min检测泽泻醇A、24-乙酰泽泻醇A和23-乙酰泽泻醇B);柱温30℃;体积流量0.9 mL/min;进样量10μL。采用SPSS 26.0统计软件对10批山菊降压胶囊含量测定结果进行主成分分析和聚类分析。结果 9种成分牡荆素葡萄糖苷、牡荆素鼠李糖苷、牡荆素、橙黄决明素、黄决明素、美决明子素、泽泻醇A、24-乙酰泽泻醇A和23-乙酰泽泻醇B线性范围良好,平均加样回收率96.90%～100.02%,RSD值均小于2.0%;聚类分析和主成分分析结果一致,10批山菊降压胶囊聚为2类,主成分1～3是影响山菊降压胶囊质量评价的主要因子。结论所建立的HPLC法可用于山菊降压胶囊中9种指标成分牡荆素葡萄糖苷、牡荆素鼠李糖苷、牡荆素、橙黄决明素、黄决明素、美决明子素、泽泻醇A、24-乙酰泽泻醇A和23-乙酰泽泻醇B的定量控制和综合质量评价。     

金樱子HPLC多组分定量控制及化学计量学综合质量评价

目的 对不同产地金樱子进行综合质量评价,为其道地研究提供依据。方法 收集8省16批次金樱子样品,采用高效液相色谱法同时检测金樱子中蔷薇酸、委陵菜酸、熊果酸、没食子酸、儿茶素、橙皮苷、芦丁、槲皮素、木犀草素、山柰酚、芹菜素和鞣花酸含量,建立金樱子多组分定量控制模式;采用主成分分析(PCA)、正交偏最小二乘法-判别分析(OPLS-DA)和熵权优劣解距离法(EW-TOPSIS)建立金樱子质量优劣评价模型,对其整体质量进行综合评价。结果 12个成分在各自范围内线性关系良好,平均加样回收率96.94%~100.05%,RSD为0.72%~1.56%;16批样品聚为3类;鞣花酸、儿茶素、槲皮素和没食子酸可能是影响金樱子产品质量主要潜在标志物;EW-TOPSIS结果显示16批金樱子相对贴近度(J_b)为0.146 2~0.756 2,不同产地的金樱子品质差异较大。结论 所建立的方法操作便捷,结果准确,可作为金樱子多组分定量控制方法;化学计量学及EW-TOPSIS法客观全面,可用于金樱子的整体质量评价。     

黑色素瘤抗原-1诱导特异性抗肝癌免疫应答

目的:探讨黑色素瘤抗原-1(MAGE-1)对特异性抗肝癌免疫应答反应的影响。方法:分别用转染pcD-NA3.1-MAGE-1(重组子)、pcDNA3.1(空质粒)以及未行转染的人肝癌细胞SMMC-7721冻融抗原致敏树突状细胞(DC),诱导T淋巴细胞增殖分化为细胞毒性T淋巴细胞(CTL)。乳酸脱氢酶释放法检测CTL对SMMC-7721细胞的杀伤活性。48只C57BL小鼠随机分为重组子组、空质粒组和PBS组,每组16只。用pcDNA3.1-MAGE-1预先免疫重组子组小鼠,1次/10d,第3次免疫后第5天ELISA法检测各组8只小鼠脾细胞培养液中IFN-γ和IL-2的含量,第6天各组8只小鼠接种鼠源性肝癌细胞H22,观察其生存时间。结果:未转染、空质粒和重组子组诱导的CTL对靶细胞的杀伤率以及各组小鼠股四头肌MAGE-1mRNA表达的比较差异有统计学意义(F=139.601和538.650,P﹤0.001),重组子组高于未转染和空质粒组。PBS组和空质粒组小鼠脾细胞培养液中IFN-γ和IL-2的含量为0,重组子组小鼠脾细胞培养液中IFN-γ含量为(372.33±10.08)ng/L,IL-2含量为(108.67±12.81)ng/L。3组小鼠荷瘤生存时间比较差异有统计学意义(F=31.837,P<0.001),重组子组小鼠生存时间明显延长。结论:MAGE-1可诱导特异性抗肿瘤免疫应答,从而显著延长荷瘤小鼠的生存时间。     

陈式太极拳和杨式太极拳运动对大学生心血管功能的影响

目的:探讨陈式太极拳和杨式太极拳运动对高校大学生心血管功能的影响,为高校大学生太极拳训练提供理论依据。方法:从某学院武术协会会员中随机挑选身体健康的男、女生各50例,采用分层随机化的方法分为2组,每组男、女生各25例。选定一组进行为期36周的陈式太极拳训练,另一组进行为期36周的杨式太极拳训练。36周训练前后,测试各组大学生反映心脏功能的指标如脉率、心搏出量、心搏指数、心输出量、心脏指数和心肌耗氧指数等;血管功能指标如脉压差、平均动脉压、平均收缩压、平均舒张压、血管顺度及总外周阻力等;血液和微循环功能指标如有效血容量、血液黏度、还原全血黏度、微循环半更新时间、微循环半更新率及微循环平均滞留时间等。结果:受试大学生的心脏功能、血管功能、血液及微循环功能与训练前相比均有明显改善;参加陈式太极拳练习的男生以上指标优于参加杨式太极拳练习的男生,参加杨式太极拳练习的女生以上指标优于参加陈式太极拳练习的女生(P均<0.05)。结论:太极拳运动能改善大学生的心血管功能;陈式太极拳运动更有助于男大学生心血管功能的改善,杨式太极拳运动更有助于女大学生心血管功能的改善。     

中医用饮片,炮制才发展

目的:探讨中药炮制发展和中医发展的关系.方法:分析炮制、饮片、中医三者的关系、存在问题,并提出建议.结果:实现常用中药饮片工业化生产,做到药材来源基地化(道地化)、工艺规范化、质量标准化、设备机械现代化、生产经营规模化、检测科学化、包装计量规格化,即规模化地将原药材加工炮制后成为标准的饮片,再依辨证施治、理法方药、君臣佐使理论,组成方剂,制成剂型,用于临床,方可增效减毒.炮制欲发展,必须用饮片;中医用饮片,饮片才发展;中医欲发展,必须重炮制.结论:中医药现代化,法律是保障,科技是动力,药材是资源,饮片是原料,成药是产品,文化是土壤,学术是灵魂,疗效是生命.     

rVledical implication in the Bible and its relevance Lo modern medicine

The Ho/y Bibe, as the root of Western civilization, has imposed great influence in the fields far beyond religion. In this thesis, the author intended to reveal the medical implication in the Ho/y Bib/e and its relevance to the modern medical science by exploring the biblical medical information and comparing it with the current medical theory and practice. The conclusion of the exploration is surprising yet inspiring： the Ho/y Bibe, as an ancient religious book, contains rich medical information around themes such as sexual relations, dietary guidelines, hygiene, etc., which is not at odds, but in harmony with the modern medicine.     

Analysis on the Seismic Performance of Steel Fiber-Reinforced High-Strength Concrete Beam–Column Joints

The present research study aims to investigate numerically the behavior of steel fiber-reinforced high-strength concrete (SFRHC) beam–column joints (BCJs) under seismic action. Based on the plastic damage constitutive model of concrete and elastic–plastic mixed-strengthen constitutive model of steel material, the finite element software ABAQUS was utilized to establish the 3D finite element (FE) model of BCJs. Additionally, the feasibility and accuracy of the numerical simulation were verified by comparing the computed results and experimental observations in terms of the hysteresis curves, skeleton curves, and failure mode. Furthermore, based on the validated FE modeling approach, load vs. displacement hysteresis curves of SFRHC–BCJs during the loading process were analyzed in detail; the failure process was also investigated. Furthermore, the effect of various parameters on the seismic behavior of BCJs was analyzed comprehensively, including the concrete strength, the volume ratio of steel fiber, and the stirrup ratio in the core area. Finally, parametric studies illustrated that increasing the concrete strength helps in enhancing the ultimate load, while the ductility decreased noticeably. Both adding the steel fiber and increasing the stirrup ratio can significantly improve the seismic performance of BCJs.