原发性肝癌患者介入治疗前后血清TNF-α、SIL-2R水平检测的临床意义

目的　分析 36例原发性肝癌患者介入治疗前后血清 TNF-α和 SIL - 2 R含量的变化。方法　采用放射免疫法测定血清 TNF- α含量 ,EL ISA法检测 SIL- 2 R含量 ,并以 35名正常健康人作对照。结果　介入治疗前血 TNF- α和 SIL- 2 R含量明显地高于正常人组水平 ( P<0 .0 1) ,介入治疗后 6个月复发者 TNF- α、SIL- 2 R水平持续异常 ,未复发者 TNF-α、SIL - 2 R水平恢复正常。结论　观察患者的免疫功能变化对原发性肝癌患者的病情和预后密切相关     

2型糖尿病患者血清肿瘤坏死因子和唾液酸联合检测的临床意义

目的　探讨血清 TNF和 SA含量在 2型糖尿病患者发生和发展中作用。方法　分别应用放免法和化学法测定 88例 2型糖尿病患者血清 TNF和 SA含量 ,并与 35名正常人作对照。结果　 2型糖尿病患者血清TNF、SA含量则显著地高于正常人组 (P<0 .0 1) ,且与胰岛素水平呈明显的正相关 (r=0 .6 82 5 ,0 .6 2 6 3,P<0 .0 1)。结论　测定 2型糖尿病患者血清中 TNF、SA含量的变化对其观察病情的变化具有重要的临床价值     

肝硬化患者一氧化氮、一氧化氮酶、肿瘤坏死因子、内皮素、内毒素水平的相关性研究

目的：探讨肝硬化患者血NO、TNF、ET与EPS的关系。方法：分别应用酶法和放射免疫分析法测定了84例肝硬化患者血NO、NOS、ET和EPS含量，并与35名正常健康人作对照。结果：肝硬化患者血NO、TNF、EPS含量高于正常人组（P＜0．05－0．01），ET水平低于正常人组（P＜0．01－0．01），且与内毒素含量的高低密切相关。结论：肝硬化患者血NO、TNF、ET水平的高低其内毒素为主要诱因。     

Salicylate enhances necrosis and apoptosis mediated by the mitochondrial permeability transition.

Onset of the mitochondrial permeability transition (MPT) causes both necrotic and apoptotic cell death in cultured hepatocytes. Salicylate lowers the threshold for onset of the MPT. In this study, our aim was to determine whether nontoxic concentrations of salicylate potentiate MPT-mediated cell killing. In necrotic killing models to rat hepatocytes, salicylate (1 mM) enhanced calcium ionophore (Br-A23187)- and tert-butylhydroperoxide (t-BuOOH)-induced cell death, which was blocked or delayed by cyclosporin A (CsA, 2 microM), a specific inhibitor of the MPT. In hepatocyte apoptosis induced by tumor necrosis factor-alpha (TNF-alpha), salicylate accelerated cell killing after low-dose TNF-alpha (1 ng/ml), which by itself induced little apoptosis. Salicylate enhancement of apoptosis was associated with onset of the MPT and accelerated caspase 3 activation. Salicylate also augmented killing of MCF-7 human breast tumor cells by etoposide and PLC/PRF/5 human hepatoma cells by tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). In conclusion, salicylate potentiates both necrotic and apoptotic cell killing by promoting onset of the MPT. Enhancement by salicylate of MPT-dependent apoptosis may play a role in protection by aspirin and other nonsteroidal anti-inflammatory drugs against colon, lung, and breast cancer.     

喹诺酮类抗生素在蒸发光散射检测器中响应因子的一致性考察

目的考察不同的喹诺酮类抗生素在蒸发光散射检测器(ELSD)中的响应因子是否一致，进而评价利用ELSD迅速测定该类药物含量的可行性。方法用HPLC-ELSD法测定了几种喹诺酮类抗生素（依诺沙星、左氧氟沙星、环丙沙星、洛美沙星和加替沙星）的进样量与响应取双对数的线性方程。色谱条件：YMC-Pack ODS-AM 柱 (150 mm×4.6 mm ID，5 μm)；流动相 0.5%三乙胺水溶液(三氟醋酸调至pH 2.5)-乙腈(48∶12);流速0.6 mL·min^-1。检测器条件：漂移管温度117 ℃，气体流速3.0 L·min^-1。结果5种物质的线性方程间无显著性差异（P>0.05）。结论5种不同的喹诺酮类抗生素在ELSD中的响应因子一致，可尝试用HPLC-ELSD法建立该类药物的一类新药基准品。     

Anti-inflammatory effect of methoxyphenamine compound in rat model of chronic obstructive pulmonary disease

AIM: To evaluate the anti-inflammatory effect of methoxyphenamine compound (MC) on chronic obstructive pulmonary disease (COPD) in rats by measurement of proinflammatory cytokines, total and differential white cell counts (WCC) of bronchroalveolar lavage fluid (BALF). METHODS: Adult rat model of COPD (COPD group) was induced by intratracheal instillation of lipopolysaccharides and exposure to cigarette smoke. Treatment groups received different dosage of MC (3, 9, and 27 mg daily, MC group) or prednisone (0.25 mg daily, P group) respectively. Tumor necrosis factor alpha (TNF-α), interleukin 1beta (IL-113), interleukin-6 (IL-6), transforming growth factor β (TGF-β) of BALF were determined by ELISA. Total and differential WCC were performed after Giemsa staining. RESULTS: The levels of TNF-α, IL-1β, IL-6, TGF-β, total and differential WCC in BALF of MC groups were significantly decreased than that of COPD group (P<0.01), and there was no significant difference among MC groups. There was no significa     

Down-Regulation of Osteoblastic Cell Differentiation by Epidermal Growth Factor Receptor

The role of epidermal growth factor receptors (EGF-R) in osteogenic cell differentiation was investigated using preosteoblastic MC3T3-E1 (MC3T3) cells and osteoblast-like ROS 17/2.8 (ROS) cells. When cultured in the presence of β-glycerophosphate (GP) and ascorbic acid (AA), MC3T3 cells underwent spontaneous differentiation into osteoblasts which was confirmed as they expressed osteoblast markers such as alkaline phosphatase (ALP), bone sialoprotein (BSP) and osteocalcin (OC). Interestingly, the number of EGF-binding sites decreased during their differentiation into osteoblasts, and the osteogenic protein-1 (OP-1) treatment, which accelerated their differentiation, lowered the number of EGF-binding sites even further. On the other hand, ROS cells with high expression levels of osteoblast markers and no EGF-R, after being transfected with human EGF-R cDNA (EROS cells), expressed numerous EGF-binding sites as well as EGF-R mRNA and protein; in the process, they ceased to express osteoblast markers, indicating their dedifferentiation into osteoprogenitor cells. Both MC3T3 and EROS cells showed increased cell growth in response to EGF, whereas ROS cells did not. These results imply that the EGF/EGF-R system in osteogenic cells has a crucial function in osteoblast phenotype suppression and osteogenic cell proliferation.     

草苁蓉提取物对大鼠肝癌前病变模型血清抗氧化酶活性及肿瘤坏死因子的影响

目的 :探讨草苁蓉甲醇提取后进一步分离的水层提取物在大鼠肝脏化学致癌初期对血清抗氧化酶活性和肿瘤坏死因子的影响 ,从而进一步探索其抗致癌作用的可能机制。方法 :按略改良的 Solt- Farber方法建立大鼠肝脏癌前病变模型 ,用草苁蓉提取物 (BR)饲养大鼠 6周后 ,取血测定超氧化物歧化酶 (SOD)、谷胱甘肽过氧化物酶(GSH - PX)、谷胱甘肽 - S-转移酶 (GST)、过氧化氢酶 (CAT)的活性和血清中的丙二醛 (MDA )及肿瘤坏死因子(TNF-α)含量。结果 :草苁蓉提取物在大鼠肝脏化学致癌初期对血清 SOD、GSH - PX、CAT的活性及 TNF-α含量有回升作用 ,并能降低由于癌前病变的形成所增高的 GST活性及 MDA含量。结论 :草苁蓉水层提取物具有抗氧化作用和调节机体免疫功能的作用 ,而这可能是草苁蓉的抗致癌机制之一     

针刺对实验性变态反应性神经炎TNF-α和IL-4的影响

目的 探讨肿瘤坏死因子-α(TNF-α)和白细胞介素-4(IL-4)与实验性变态反应性神经炎(EAN)发病的关系，从细胞因子水平研究针刺疗法对本病的免疫调节作用。方法 40只大鼠分为正常对照组、模型组、针刺组、药物组，建立大鼠EAN动物模型，观察大鼠发病率及致病程度，针刺组取腰。夹脊、足三里、悬钟穴，药物组用泼尼松灌胃给药。采用双抗体夹心ELISA法，检测大鼠血清的TNF-αa和IL-4的含量变化。结果 模型组TNF-α含量较正常组明显升高。针刺组和药物组均能降低TNF-α的含量，使其水平接近正常，尤以药物组抑制作用明显。IL-4的含量各组间均无明显差异。结论 提示本病存在Th1／Th2细胞因子间的失衡，其中以Th1型细胞占优势。针刺主要是通过抑制TNF-α等Th1细胞，来重建细胞因子间的平衡。