SiO2刺激矽肺肺泡巨噬细胞对MMP-9和TIMP-1表达的影响

Objective To investigate the effect of SiO2 on the expression of matrix metalloproteinase-9 (MMP-9)and tissue inhibitor of metalloproteinase-1 (TIMP-1)in human silicofic alveolar macrophages (AM).Methods Human alveolar macrophages were collected from a silicotic patient by bronchoalveolar lavage and exposed to silicon dioxide for 3h,6h,12h,18h,24h and 36h.The expression of the MMP-9 in the AM were detected with zymography and immunological method and the expression of the TIMP-1 in the AM with immunological method.Results The expressions of MMP-9 in the AM increased clearly along with the time,reached peak at 24 h when detected with zymography (average optical density:3.061±0.153 vs 2.851±0.164,P＜0.05);and reached peak at 18h when detected with immunological method (average optical density:0.386±0.037 vs 0.322±0.034,P＜0.05).The expression of the TIMP-1 in the AM did not vary when detected with immunological method (P＞0.05).Conclusion SiO2 may affect the expression of MMP-9 and MMP-9 activity in the cultured AM.     

与压力性尿失禁面对面

已经年过三十的李茹（化名），看起来比实际年龄年轻很多，周围的人都很羡慕她。但是她最清楚自己说不出的苦，事情是从“下边”开始的。这一年来李茹很痛苦。她的小便好像越来越不受控制了。有时稍微用力打个喷嚏、咳嗽、大笑、蹲下捡东西……只要是爆发性的小动作，     

被忽视的23个爱的细节

有一则小幽默：妻子问丈夫：亲爱的，为什么结婚后你不再送我鲜花了？丈夫回答：既然鱼已经钓到了，何必再浪费鱼饵呢？此虽笑谈，却不免令许多妻子心有共鸣。难道平淡生活中的丈夫，真的失去往日的爱意了吗？     

益气活血法治疗充血性心力衰竭临床观察

目的探讨益气活血法治疗充血性心力衰竭(CHF)理论机制及临床疗效.方法将患者 90例随机分为益气活血组、活血化瘀组、益气组和对照组,所有患者均给予常规西医治疗,并分别予益气活血(益气活血组)、活血化瘀(活血化瘀组)、益气(益气组 )之剂和单纯西医治疗(对照组).结果益气活血组疗效及总有效率均明显优于对照组,其它各组间疗效比较无显著性差异;益气活血组、活血化瘀组和益气组 Boston积分差值均显著高于对照组,此三组组间疗效相近;各组治疗后左室射血分数 (LVEF)均较治疗前显著升高,组间比较无显著性差异.结论 CHF主要中医证型为气虚血瘀,治疗应以益气活血为大法.     

液相色谱-离子阱质谱联用法建立留坝西洋参药材特征图谱研究

目的建立留坝西洋参药材皂苷成分的特征图谱。方法通过固相萃取小柱预处理样品,电喷雾质谱正离子模式全扫描法检测。结果从西洋参药材总提物的正离子全扫描总离子流图中选择了3个具有代表性的强峰,建立了西洋参药材皂苷成分的特征对应图谱。结论该方法有较好的重现性,能准确分析、鉴别西洋参药材。     

隐丹参酮固体分散体的制备及性质研究

目的制备隐丹参酮固体分散体,提高隐丹参酮的溶出度。方法采用溶剂蒸发法制备隐丹参酮-PVP固体分散体,熔融法制备隐丹参酮-PEG固体分散体,利用体外溶出度、差热分析、显微观察研究固体分散体的性质及其对溶出度的影响。结果PVP及PEG固体分散体在45min的溶出度分别达到原料药的9.7倍和7.5倍,固体分散体的DTA曲线中隐丹参酮的特征熔融峰消失。结论两种固体分散体均能显著提高隐丹参酮的溶出度,而PVP固体分散体比PEG固体分散体具有更高的溶出度。     

毛冬青的化学成分研究

毛冬青为冬青科植物毛冬青I lex pubescemHook.etA rm的干燥根,具有活血通脉、消肿止痛、清热解毒的功效,在临床上广泛用于治疗冠心病、心绞痛和脉管炎等疾病。为了寻找该植物中的活性成分,笔者对毛冬青进行了化学成分研究。从其70%乙醇提取物中分离得到7个化合物,经理化常数测定和波谱解析鉴定为丁香苷(Ⅰ)、sinap ic aldehyde4-O--βD-g lucopyranoside(Ⅱ)、liriodendrin(Ⅲ)、( )-环合橄榄树脂素(Ⅳ)、tortoside A(Ⅴ)、(-)-橄榄树脂素(Ⅵ)、对羟基苯乙醇(Ⅶ)。1药材、仪器与试剂熔点用XT4-100显微熔点仪测定;核磁共振谱用Inova-500…     

Dietary modulation of 7,12-dimethylbenz[a]anthracene (DMBA)-induced adrenal toxicity in female Sprague-Dawley rats.

In this study, dietary modulation of 7,12-dimethylbenz[a]anthracene (DMBA)-induced adrenal toxicity in rats was investigated. Beginning at postnatal day (PND) 21, female Sprague-Dawley rats were fed either soy-containing NIH-31 diet or soy- and alfalfa-free 5K96 diet. On the first day of diestrus when the animals were PND 50 +/- 5, rats received either an oral dose of 80 mg/kg DMBA or sesame oil, the vehicle, and were sacrificed at 24, 36, or 48 h after treatment. Apoptosis was manifested at 24 and 36 h after DMBA treatment in the zona reticularis (ZR) and the zona fasciculata (ZF) of the adrenal cortex; this was followed by severe hemorrhagic necrosis at 48 h. DMBA-induced apoptosis, evaluated by the TUNEL assay, immunohistochemical analysis of activated caspase 3, and the ratio of expression of pro-apoptotic Bax to anti-apoptotic Bcl2, was greater in rats fed NIH-31 diet relative to rats fed 5K96 diet at 24 h after treatment. Four of six DMBA-treated rats fed 5K96 diet had severe adrenal necrosis by 48 h, whereas this lesion was present in only two of six DMBA-treated rats fed NIH-31 diet. DMBA also caused a significant decrease of serum corticosterone relative to controls at 48 h in rats fed 5K96 diet. The present study indicated that diet modulates DMBA-induced adrenal toxicity in female rats, with increased apoptosis early and reduced necrosis later in rats fed a soy-containing diet.     

Lithocholic acid decreases expression of UGT2B7 in Caco-2 cells: a potential role for a negative farnesoid X receptor response element.

Human UDP-glucuronosyltransferase (UGT) 2B7 is the major isoform catalyzing the glucuronidation of a variety of endogenous compounds including bile acids. To determine the role of bile acids in the regulation of UGT2B7 expression, Caco-2 cells were incubated with the natural human farnesoid X receptor (hFXR) ligand, chenodeoxycholic acid, as well as the secondary bile acid, lithocholic acid, derived from chenodeoxycholic acid. Incubation of Caco-2 cells with lithocholic acid in the absence of exogenous hFXR resulted in a dose-dependent down-regulation of UGT2B7 mRNA levels, with an IC(50) of 13 microM. Similar down-regulation was also observed with chenodeoxycholic acid; however, much higher concentrations were required. Transient transfection of Caco-2 cells with hFXR suppressed UGT2B7 mRNA expression both in the absence and presence of ligand. UGT2B7 promoter transfection experiments and deletion/mutation analysis showed that lithocholic acid-activated hFXR decreased UGT2B7 promoter activity via a negative hFXR response element (NFRE) located between nucleotides -148 and -134. Cotransfection with hFXR and/or human retinoid X receptor further enhanced the repression. Electrophoretic mobility shift assays additionally confirmed the role of NFRE in UGT2B7 down-regulation by lithocholic acid. These findings suggest that lithocholic acid, an activator of nuclear hFXR, acts as a negative regulator of UGT2B7 expression, indicating that hFXR may play an essential role in lithocholic acid homeostasis through negative regulation of this UGT that is involved in lithocholic acid biotransformation. Therefore, it is postulated that lithocholic acid toxicity may be due to down-regulation of genes involved in its detoxification, including UGT2B7, leading to limited excretion of lithocholic acid from the body.     

归芪胶囊对家兔心肌缺血-再灌注损伤血清中谷胱甘肽过氧化物酶、过氧化氢的影响

目的探讨归芪胶囊对家兔心肌缺血-再灌注损伤的保护作用.方法以家兔血清中谷胱甘肽过氧化物酶(GSH-PX)、过氧化氢(H20 2)为指标进行实验观察.结果归芪胶囊对心肌缺血-再灌注损伤家兔血清中GSH-PX的升高与H202的降低有显著作用(P＜0.01).结论归芪胶囊通过对GSH-PX与H202含量的影响,对再灌注心肌损伤有保护作用.