芍芪多苷对体外化学性肝细胞损伤的保护作用

目的探讨芍芪多苷对CCl4致体外原代肝细胞损伤模型的保护作用及可能机制。方法建立CCl4致化学性体外肝细胞损伤模型,分光光度法检测丙氨酸氨基转移酶(ALT)、丙二醛(MDA)、超氧化物歧化酶(SOD)含量,MTT法检测肝细胞存活率。结果芍芪多苷可降低原代肝细胞培养上清液中ALT、MDA水平,增加SOD酶活性,提高肝细胞存活率。结论SQDG对CCl4所致肝细胞体外损伤模型具有明显的保护作用。     

耳穴贴压复合表面麻醉用于鼻内镜手术的效果观察

目的：评价耳穴贴压复合表面麻醉用于鼻内镜手术的麻醉效果。方法选择80例表面麻醉下择期鼻内镜手术患者,随机数字法分为两组：耳穴贴压复合表面麻醉组（A组,n=40）和单纯表面麻醉组（B组,n=40）。 A组患者取耳神门（TF4）、交感（AH6a）和外鼻（TG1.2i）3处穴位粘贴王不留行籽,于术前30分钟进行按压治疗,B组仅穴位处粘贴胶布作为对照且不行按压治疗。患者均采用1%的丁卡因进行表面麻醉,术中根据患者情况给予小剂量的艾司洛尔、硝酸异山梨酯或芬太尼。术中观察麻醉优良率;艾司洛尔、硝酸异山梨酯与芬太尼使用率及不良反应。结果与B组比较,A组麻醉优良率明显升高（P〈0.01）,艾司洛尔、硝酸异山梨酯与芬太尼使用率降低（P均〈0.01）,两组均未出现不良反应。结论耳穴贴压复合表面麻醉用于鼻内镜手术具有良好的麻醉效果。     

腹腔镜下胆总管探查治疗胆囊结石并胆总管结石

目的探讨用腹腔镜行胆总管探查术治疗胆石症的微创意义及可行性。方法回顾分析45例胆囊结石并胆总管结石患者的临床资料。其中内镜括约肌切除术(EST)取石失败31例,腹腔镜胆囊切除术中造影发现胆总管结石11例。结果45例胆石症患者均在腹腔镜下完成手术,手术时间为(92.0±16.4)min,术后残余结石3例(7%),2例行经窦道胆道镜取石成功,1例行经T管肝素溶石。术后3～7周拔除T管,无胆漏发生。结论腹腔镜胆囊切除并胆总管探查术治疗胆囊结石并胆总管结石具有安全性和可行性,治疗效果肯定,微创意义明显。     

重组人PPARα基因载体phPPARα-IRES2-EGFP高效体外转染表达体系的建立

目的 建立体外phPPARα-IRES2-EGFP质粒高效转染并获得重组基因hPPARα高效表达的体系.方法 采用阳离子脂质体Lipofectamine 2000将phPPARα-IRES2-EGFP转染入293细胞,荧光显微镜观察质粒转染的293细胞绿色荧光蛋白(GFP)报告基因表达强度及转染效率,并对转染细胞hPPARα的表达进行荧光定量PCR和Western Blot检测.结果 荧光显微镜下可见转染phPPARα-IRES2-EGFP的293细胞GFP报告基因高表达,转染效率高达(83±9)%;并且,其hPPARα mRNA表达水平高于空载体转染对照组3个数量级,hPPARα蛋白表达也远高于对照组(P＜0.01),说明导入的重组质粒能够高效表达bPPARα.结论 成功建立重组质粒phPPARα-IRES2-EGFP高效体外转染表达体系,为hPPARα受体功能的研究及基于hPPARα为靶标的药物筛选平台的建立奠定了基础.     

针对性护理干预对慢性湿疹患者脱敏治疗依从性的影响

目的 探讨在行脱敏治疗的慢性湿疹患者中应用针对性护理干预对其治疗依从性的影响。方法 选取 2022年6月-2023年6月于纸坊街社区卫生服务中心行脱敏治疗的100例慢性湿疹患者,随机分为对照组和 观察组,每组50例。对照组实施常规护理,观察组在对照组基础上实施针对性护理干预,比较两组依从 性、满意度、并发症发生情况、疾病认知情况及生活质量。结果 观察组依从性为98.00%,高于对照 组的82.00%（P ＜0.05）;观察组满意度为94.00%,高于对照组的74.00%（P ＜0.05）;观察组不良反 应发生率为2.00%,低于对照组的18.00%（P ＜0.05）;观察组对疾病发病原因、治疗方法、护理及措 施、风险因素的认知评分均高于对照组（P ＜0.05）;观察组干预后生活质量各维度评分均高于对照组 （P ＜0.05）。结论 在行脱敏治疗的慢性湿疹患者中应用针对性护理干预的效果良好,可有效改善患者对 疾病的认知,提高其依从性及满意度,同时有利于降低并发症发生几率,提升患者的生活质量水平。     

三七治疗动脉粥样硬化的研究进展

动脉粥样硬化(atheroscIerosis,AS)是导致心脑血管事件发生的关键因素,为多种心脑血管疾病共同的病理生理基础.其证候、病机等属于中医理论的"血瘀证".而三七自古便是历代医家常用的活血化瘀之要药.综述近年来三七在治疗动脉粥样硬化方面的研究进展.     

尿激酶对肺纤维化干预作用及对MMP-9和TIMP-1的影响

目的:探讨尿激酶型纤溶酶原激活剂(uPA)对肺纤维化的干预作用和对MMP-9/TIMP-1的影响.方法:SD雄性大鼠45只,随机分成3组:干预组(博莱霉素 尿激酶)、模型组(博莱霉素 生理盐水)和对照组.所有大鼠第28天处死.经HE、Masson胶原染色评价肺组织肺泡炎和肺纤维化程度.酶联免疫吸附法( ELISA)检测肺泡灌洗液中MMP-9、TIMP-1含量.结果:(1)肺泡炎程度评价:模型组为(1.7±0.6)分,干预组为(0.9±0.7)分,对照组为(0.2±0.4)分,模型组与干预组、对照组比较,差异有统计学意义(P＜0.01).(2)肺纤维化程度评价:模型组为(2.0±0.8)分,干预组为(1.1±0.7)分,组间差异有统计学意义(P＜0.01).(3)TIMP-1含量:模型组(1 240.8±90.3) pg/ml,对照组(1 078.3±31.6)pg/ml,干预组 (1 163.6±69.6) pg/ml,模型组与对照组比较差异有统计学意义(P＜0.01);模型组与干预组比较,差异有统计学意义(P＜0.05).结论:尿激酶能减轻博来霉素诱导的大鼠肺纤维化,可能是通过抑制TIMP-1途径起作用.     

不同nPCL/HA电纺纤维薄膜对人骨髓间充质干细胞黏附率的影响

目的：观察nPCL/HA电纺纤维取向薄膜材料对人骨髓间充质干细胞（hBMSCs）的黏附生长的影响,评价其作为组织工程支架材料的应用前景。方法：将体外诱导培养的人骨髓间充质干细胞（hBMSCs）,经传代培养第5代的人骨髓间充质干细胞,以2×105的密度与不同nPCL/HA电纺纤维取向薄膜支架在培养板内共培养,同时以nPCL电纺纤维非取向薄膜材料作为对照,初步观察不同nPCL/HA支架材料与hBMSCs的复合培养情况,计算各材料的细胞黏附率。结果：hBMSCs与4种电纺薄膜支架材料均有良好的细胞相容性,细胞能在不同材料表面黏附生长。但是nPCL/80℃HA电纺纤维取向薄膜材料黏附率（45.6±3.2）%,明显高于nPCL/180℃HA电纺纤维取向薄膜材料黏附率（36.5±3.0）%。结论：80℃条件下合成的nPCL/HA电纺取向薄膜材料细胞黏附率较高,较适合作为支架材料应用于hBMSCs为种子细胞的组织工程构建。     

酸性微环境下大蒜素增强大鼠自然杀伤细胞的功能活性

目的 观察体外酸性培养环境下大蒜素对自然杀伤(NK)细胞功能活性的影响,并探讨其机制.方法 以pH 5.6、pH 6.5和pH 7.2的完全RPMI 1640培养基对大鼠脾脏CD3-NKR-P1+NK细胞进行悬浮培养,并给予30 mg/L浓度的大蒜素进行处理.酶联免疫吸附试验(ELISA)检测细胞培养液中干扰素(IFN)-γ的分泌水平,流式细胞仪检测NK细胞的增殖和凋亡率,乳酸脱氢酶法检测NK细胞的功能活性.结果 酸性培养环境下大鼠脾脏NK细胞的增殖能力明显下降,NK细胞功能活性明显受阻.在pH 7.2、pH 6.5和pH 5.6三种不同的培养条件下,大蒜素对NK细胞增殖率的影响表现为随培养环境的pH降低反而升高,以pH 5.6、培养16 h时达最高33.3%.与之相对应,NK细胞分泌的IFN-γ达(64.59±0.09)ng/L,较培养4 h时升高28%,且对小鼠淋巴瘤Yac-1细胞的杀伤活性也达到最高水平.结论 大蒜素可通过提高NK细胞IFN-γ分泌水平明显改善酸性培养环境下NK细胞的功能活性.

Abstract：

Objective To investigate the role of allicin on rat nature killer (NK) cell activity in vitro under acidic microenvironment, and its possible mechanism. Methods CD3- NKR-P1+ NK cells isolated from the rat spleen were cultured in the complete RPMI 1640 medium ( pH 5. 6, pH 6. 5, or pH 7. 2 respectively), and treated with allicin at final concentration of 30 mg/L. Enzyme linked immunosorbent assay (ELISA) was used to determine supernatant interferon (IFN)-γ levels. The percentage of NK cells proliferation and apopotosis was analyzed by flow cytometry. NK cell cytotoxicity toward YAC-1 tumor cells was detected by LDH release assay. Results Proliferation and cytotoxicity of NK cells were significantly suppressed by acidic microenvironment in vitro. Under the cultured condition of acidic pH below 7. 2, allicin seemed to promote NK cells proliferation, which reached to highest level of 33% at pH 5. 6 cultured for 16 h. Correspondingly, at pH of 5. 6, allicin induced a marked increase of IFN-γ concentration in the supernatant from (50. 07 ± 0. 38) (cultured for 4 h) to (64. 59 ± 0. 09) ng/L ( cultured for 16 h). The cytotoxicity of NK cells toward YAC-1 tumor cells was also found strongest under the condition of pH 5. 6 cultured for 16 h. Conclusion Allicin favored to enhance the cytotoxicity of NK cells under the acidic cultured condition, which might be related to the increase of IFN-γ production.     

Degradation Mechanism and Numerical Simulation of Pervious Concrete under Salt Freezing-Thawing Cycle

In order to explore the occurrence area of pervious concrete freeze-thaw deterioration, the mass loss, strength deterioration, ultrasonic longitudinal wave velocity and dynamic elastic modulus attenuation of pervious concrete under freeze-thaw cycles were measured, and a prediction model of freeze-thaw damage was established. The mechanical properties of hardened cement pastes with the same W/C ratio under freeze-thaw cycles were also measured. Mercury intrusion porosimetry (MIP) was used to measure the pore structure characteristic parameters and pore size distribution changes of cement paste under freeze-thaw cycle, and the microstructure evolution of interfacial transition zone (ITZ) of paste and aggregate was observed by SEM scanning electron microscopy. Finally, a pervious concrete model was established by DEM to analyze the relationship between the number of freeze-thaw cycles and the mesoscopic parameters. The results indicated that the quality, strength and dynamic elastic modulus of pervious concrete deteriorate to different degrees under the conditions of water freezing and salt freezing. The damage sensitivity and strength loss of freeze-thaw damage is greater than the dynamic elastic modulus loss, which is greater than mass loss. In the pervious concrete paste which underwent 100 freeze-thaw cycles, the pore structure and macro strength had no obvious change, and hardened paste and the aggregate-interface-generated defects increased with the increase in freezing and thawing times, indicating that the deterioration of pervious concrete performance under freeze-thaw cycles was closely related to the deterioration of the interface strength of the aggregate and hardened paste. The pervious concrete model established by DEM can accurately simulate the change of the compressive modulus and the strength of pervious concrete during freeze-thaw cycles.