幼鼠内毒素血症脾内单核-巨噬细胞等动态分布

用组织化学和生化方法探讨了幼龄大鼠内毒素血症脾急性非特异性免疫反应,腹腔注入内毒素（ｉ．ｐ．ＬＰＳ）１ｈ,脾内碱性磷酸酶（ＡＬＰａｓｅ）阳性细胞开始增多,至１２ｈ红髓和边缘区内呈现大量的ＡＬＰ阳性细胞,２４－７２ｈ这些阳性细胞逐渐减少至正常。电镜下证实这些阳性细胞多数为单核－巨噬细胞和中性粒细胞。     

逍遥丸治疗性激素造模大鼠子宫肌瘤实验研究

目的　研究逍遥丸治疗子宫肌瘤的药理作用并为临床应用提供参考依据。方法　给大鼠注射已烯雌酚和黄体酮造模 ,对造模大鼠分别给予逍遥丸、宫瘤清胶囊和生理盐水 ,并测定给药组、阳性对照组、模型对照组和空白对照组的血清雌二醇、孕酮水平和子宫肌瘤组织匀浆水平 (NOS)。结果　逍遥丸有拮抗雌孕激素和子宫NOS的作用。结论　上述作用是逍遥丸治疗子宫肌瘤的部分作用机制     

氧化苦参碱对大鼠缺血再灌注心肌损伤生化指标的影响

目的:探讨氧化苦参碱对大鼠缺血再灌注心肌的保护作用.方法:45只成年大鼠随机分成3组:正常对照组、缺血再灌注组、氧化苦参碱组,麻醉大鼠后冠脉结扎30 min,再灌60 min后,各组立即取出心脏,用冰盐水冲洗、吸干、称重后以生理盐水为介质,用匀浆器制成心肌组织匀浆,观察3组大鼠心肌组织匀浆中脂质过氧化物质、酶学指标的变化.结果:氧化苦参碱组超氧化物歧化酶、谷胱甘肽过氧化物酶活力、一氧化氮水平、诱导型一氧化氮合酶活力显著高于缺血再灌注组,丙二醛显著低于缺血再灌注组(P＜0.01).结论:氧化苦参碱对大鼠缺血再灌损伤的心肌具有保护作用,此作用可能与抑制心肌脂质过氧化、增强抗氧化能力有关.     

Partial hepatectomy vs. transcatheter arterial chemoembolization for multiple hepatocellular carcinomas of BCLC-B stage: A meta-analysis of high-quality studies

Background/aimThe Barcelona Clinic Liver Cancer (BCLC) recommends that transcatheter arterial chemoembolization (TACE) are indicated in patients with multiple hepatocellular carcinomas (HCCs) of BCLC-B stage. However, partial hepatectomy (PH) has increasely performed in these patients. The purpose of this meta-analyses is to illustrate the comparative survival benefits of PH and TACE for patients with multiple HCCs of BCLC-B stage.MethodElectronic databases were systematically searched for eligible studies that compared PH and TACE performed in patients with multiple HCCs of BCLC-B stage. Studies that met the inclusion criteria were reviewed systematically. The reported data were aggregated statistically using the RevMan5.3 software. Primary endpoint was overall survival (OS), and secondary endpoint were the 1-, 3-, and 5-year survival rates, postoperative 30-day mortality and postoperative complications.ResultsA total of seven high-quality studies (one randomized controlled trial [RCT], six propensity-score matching (PSM) nonrandomized comparative trials [non-RCTs] that met the inclusion criteria, which comprised of 2487 patients (1245 PH and 1242 TACE) in the meta-analysis. When compared with the TACE group, the PH group had a significantly higher OS (HR, 1.65; 95% CI, 1.48–1.84; P = 0.26; I² = 22%) and 1-, 3-, 5-year survival rates (OR, 1.96; 95% CI, 1.59–2.41; P = 0.0005; I² = 75%; P < 0.00001; OR, 2.92; 95% CI, 1.94–4.42; P = 0.0001; I² = 78%; P < 0.00001; OR, 2.60; 95% CI, 2.17–3.11; P = 0.13; I² = 44%; P < 0.00001; respectively). Survival benefits persisted across sensitivity and subgroup analyses; High heterogeneity remained after sensitivity and subgroup analyses for 3-year survival rates.ConclusionPH can provide more survival benefit for patients with multiple HCCs of BCLC-B stage compared with TACE.     

Synthesis and Biological Evaluation of 5-Nitropyrimidine-2,4-dione Analogues as Inhibitors of Nitric Oxide and iNOS Activity

Fifty two compounds based on 5-nitropyrimidine-2,4-dione moiety have been synthesized and evaluated for their inhibitory potency on the production of nitric oxide. Among them, compound 36 inhibited the production of nitric oxide (IC₅₀: 8.6 μm ) on lipopolysaccharide-induced RAW 264.7 cells and inducible nitric oxide synthase activity (IC₅₀: 6.2 μm ), as well as exerted no potential cytotoxicity (IC₅₀ > 80.0 μm ). Docking study confirmed that compound 36 was an inducible nitric oxide synthase inhibitor with perfect binding to the active site of inducible nitric oxide synthase. At a dose of 10 mg/kg, oral administration of 36 possessed protective properties in carrageenan-induced paw edema of male ICR mice.     

血府逐瘀汤对子宫肌瘤模型大鼠NOS、TNF-a、IL-2水平及子宫平滑肌厚度的影响

目的:观察血府逐瘀汤对子宫肌瘤的疗效,并研究其对子宫平滑肌厚度的以及NOS、TNF-a、IL-2水平的影响。方法:将45只SD大鼠随机分为3组,分别是空白组、模型组、中药干预组,每组15只。其中模型组及中药干预组大鼠接收腹腔注射苯甲酸雌二醇建立子宫肌瘤大鼠模型,造模后中药干预组大鼠接收血府逐瘀汤灌胃,模型组及空白组大鼠接收等剂量生理盐水灌胃,连续灌胃15 d,治疗结束后测量各组大鼠子宫系数变化,采用HE染色法比较子宫平滑肌厚度变化,使用Western Blot测定大鼠子宫组织TNF-a浓度变化,Elisa法检测大鼠外周血清NOS、IL-2水平变化。结果:1)与空白对照组比较,模型组及中药干预组子宫系数增加,中药干预组明显较模型组小,差异有统计学意义(P 0. 05); 2)与空白对照组比较,模型组及中药干预组子宫平滑肌厚度增加,中药干预组明显较模型组减少,差异有统计学意义(P 0. 05);3)空白组大鼠子宫平滑肌细胞排列整齐,平滑肌层薄;模型组大鼠平滑肌出现明显增生,细胞排列错乱,肌纤维疏松粗短,且在肌纤维束间出现明显结缔组织,纵行肌层和环行肌层均明显增厚。中药干预组较模型组有明显改善,平滑层细胞排列较整齐,出现轻度的细胞脱落现象,黏膜上皮细胞少量增生; 4)模型组及中药干预组大鼠子宫组织TNF-a及外周血NOS浓度较空白对照组上调,IL-2浓度有所下降,其中中药干预组明显优于模型组,差异有统计学意义(P 0. 05)。结论:血府逐瘀汤对子宫肌瘤有明显抑制效应,其作用机制可能与介导NOS、TNF-a、IL-2水平变化有关。     

大豆黄酮对痴呆模型神经元的抗凋亡作用

目的观察大豆黄酮对神经元细胞内三种与老年痴呆相关蛋白（淀粉样前体蛋白（APP）、β-分泌酶（BACE）、一氧化氮合酶1（NOS1））的表达影响。方法用新生24 h内的SD大鼠,经解剖分离海马,培养海马神经元细胞,生物性状稳定时,用于实验。实验分5组,分别为正常对照组、硝普钠（SNP）诱导凋亡组及三种浓度的大豆黄酮预处理组。培养至第11~12 d使用免疫组化法对海马神经元进行鉴定,并对5组细胞分别进行上述三种痴呆相关蛋白的免疫化学染色分析,采用显微照像系统对免疫组化后的细胞照相,然后通过Digital Imaging System v1.6对细胞免疫组化的图片测出阳性区平均灰度值,进行统计分析。结果 1.成功建立了SD大鼠海马神经元体外培养模型,并建立了SNP诱导的体外培养海马神经元凋亡模型;2.细胞免疫化学染色显示大豆黄酮在试验范围内有剂量依赖关系。与对照组相比,SNP处理的海马神经元的APP、BACE、NOS1的表达显著增加（P〈0.05）;与SNP组相比,低、中浓度大豆黄酮组的细胞内APP和NOS1的表达水平显著降低（P〈0.05）,高浓度大豆黄酮组的细胞内APP、BACE、NOS1的表达水平显著降低（P〈0.05）。结论成功建立了SNP诱导的体外培养海马神经元凋亡模型,大豆黄酮具有抑制神经元凋亡作用,其机制与通过抑制细胞内淀粉样前体蛋白、β-分泌酶和神经型一氧化氮合酶的产生密切相关。     

椒苯酮胺对局灶性脑缺血再灌注损伤大鼠的神经保护作用

目的观察椒苯酮胺（piperphentonamine,PPTA）对大鼠脑缺血再灌注损伤后的保护作用,并探讨其作用机制。方法随机将SD大鼠分为假手术组、模型组、PPTA组（2.5,5,10 mg/kg）和阳性对照依达拉奉组（6 mg/kg）。采用大鼠大脑中动脉闭塞（MCAO）2 h再灌注模型,缺血1 h后静脉注射给药,复通灌流24 h后,采用Zea-Longa法进行神经功能缺陷评分,检测大鼠脑组织含水量,TTC染色法测定梗死体积及脑组织中SOD、MDA、GSH、NO、NOS生化指标。结果与模型组相比,PPTA组神经功能评分减低,梗死体积减少,脑组织中SOD、GSH活力增加,NOS活力降低,MDA和NO含量减少。其中以高剂量（10 mg/kg）组改变最为明显。结论 PPTA可能通过抑制脂质过氧反应和清除氧自由基等机制,发挥神经保护作用。