糖尿病患者白内障手术的相关风险

白内障是糖尿病患者常见眼部并发症之一.与非糖尿病患者相比,糖尿病患者白内障发病年龄更早,进展更迅速.虽然超声乳化白内障手术和传统白内障囊外摘除手术相比手术时间短,视力恢复快,但对于糖尿病患者,白内障手术风险仍远远高于非糖尿病患者.术中小瞳孔的出现概率较大,手术可导致糖尿病视网膜病变加重,术后更易发生黄斑水肿、眼内炎、角...     

牡丹皮中丹皮酚、总苷、多糖单用及合用后的协同抑菌作用考查

目的:考查牡丹皮中抑菌药效成分丹皮酚、总苷、多糖单用及合用后的协同抑菌作用.方法:分别提取牡丹皮中的丹皮酚、总苷、多糖,定量后再以大肠埃希菌、肺炎克雷白菌、铜绿假单胞菌、粪肠球菌为实验菌株,用琼脂二倍稀释法测定最小抑菌浓度(MIC,minimal inhibitory concentrations),并分析比较抑菌活性.结果:牡丹皮总苷对大肠埃希菌、肺炎克雷白菌、铜绿假单胞菌、粪肠球菌标准株和临床株均有抑菌作用,其中对铜绿假单胞菌作用最强,对肺炎克雷白菌作用相对较弱;丹皮酚与总苷相比也具有抑菌作用,MIC明显高于总苷;多糖仅对粪肠球菌及铜绿假单胞菌有抑菌效果;丹皮酚与总苷合用后有协同抑菌作用,对粪肠球菌尤为显著.结论:牡丹皮总苷及丹皮酚具有一定的抑菌活性,且二者合用效果更强,提示该作用可进一步开发利用.     

A polyphenol-assisted IL-10 mRNA delivery system for ulcerative colitis

With the development of synthesis technology, modified messenger RNA (mRNA) has emerged as a novel category of therapeutic agents for a broad of diseases. However, effective intracellular delivery of mRNA remains challenging, especially for its sensitivity to enzymatic degradation. Here, we propose a polyphenol-assisted handy delivery strategy for efficient in vivo delivery of IL-10 mRNA. IL-10 mRNA binds to polyphenol ellagic acid through supramolecular binding to yield a negatively charged core, followed by complexing with linear polyetherimide and coating with bilirubin-modified hyaluronic acid to obtain a layer-by-layer nanostructure. The nanostructure specifically up-regulated the level of IL-10, effectively inhibited the expression of inflammatory factors, promoted mucosal repair, protected colonic epithelial cells against apoptosis, and exerted potent therapeutic efficacy in dextran sulfate sodium salt-induced acute and chronic murine models of colitis. The designed delivery system without systemic toxicity has the potential to facilitate the development of a promising platform for mRNA delivery in ulcerative colitis treatment.     

苦参素联合干扰素对慢性乙肝病毒定量的影响

目的 观察苦参素联合干扰素对慢性乙肝病毒定量指标的影响。方法 治疗组用苦参素联合干扰素，对照组单用干扰素，疗程均为3mon，观察治疗效果及副作用。结果 两组治疗结束后ALT和AST水平均较治疗前明显下降(P＜0．01)。HBV—DNA和HBeAg水平较治疗前明显下降(P＜0.01)。两组治疗结束后治疗组比对照组下降更明显(P＜o．01)。治疗组对白细胞和血小板下降的影响较小(P＜o．05)。结论 采用苦参素联合干扰素治疗慢性乙肝具有较好的抗病毒作用。     

榄香烯对人喉鳞癌细胞生长抑制与凋亡诱导作用

目的探讨榄香烯对人喉鳞癌细胞株HEp2细胞的生长抑制作用,以及对半胱天冬氨酸蛋白酶3(Caspase3)活性的影响。方法采用四氮甲基唑蓝(MTT)法和流式细胞分析技术(FCM),研究榄香烯诱导人喉鳞癌细胞株HEp2细胞凋亡的作用;用比色法观察榄香烯诱导人喉鳞癌细胞株HEp2细胞凋亡时Caspase3活性的变化。结果榄香烯抑制HEp2细胞生长呈时间剂量依赖性,24hIC50值为69.297mg·L-1;榄香烯(60mg·L-1)和顺铂(3mg·L-1)联合用药可加强抑制作用;Caspase3活性在榄香烯作用12h达到最高,并随药物作用时间的延长而下降。结论榄香烯可诱导HEp2细胞凋亡,同时可引起Caspase3活性的改变。     

Polymorphisms of human cytochrome P450 2C9 and the functional relevance

Human cytochrome P450 2C9 (CYP2C9) accounts for ∼20% of hepatic total CYP content and metabolizes ∼15% clinical drugs such as phenytoin, S-warfarin, tolbutamide, losartan, and many nonsteroidal anti-inflammatory agents (NSAIDs). CYP2C9 is highly polymorphic, with at least 33 variants of CYP2C9 (*1B through *34) being identified so far. CYP2C9*2 is frequent among Caucasians with ∼1% of the population being homozygous carriers and 22% are heterozygous. The corresponding figures for the CYP2C9*3 allele are 0.4% and 15%, respectively. There are a number of clinical studies addressing the impact of CYP2C9 polymorphisms on the clearance and/or therapeutic response of therapeutic drugs. These studies have highlighted the importance of the CYP2C9*2 and *3 alleles as a determining factor for drug clearance and drug response. The CYP2C9 polymorphisms are relevant for the efficacy and adverse effects of numerous NSAIDs, sulfonylurea antidiabetic drugs and, most critically, oral anticoagulants belonging to the class of vitamin K epoxide reductase inhibitors. Warfarin has served as a practical example of how pharmacogenetics can be utilized to achieve maximum efficacy and minimum toxicity. For many of these drugs, a clear gene–dose and gene–effect relationship has been observed in patients. In this regard, CYP2C9 alleles can be considered as a useful biomarker in monitoring drug response and adverse effects. Genetic testing of CYP2C9 is expected to play a role in predicting drug clearance and conducting individualized pharmacotherapy. However, prospective clinical studies with large samples are warranted to establish gene–dose and gene–effect relationships for CYP2C9 and its substrate drugs.     

含咖啡因某维生素功能饮料对机体运动行为能力影响分析

目的探讨含咖啡因某维生素功能饮料对人体运动行为能力的影响。方法 2015年3月选取某高校35名学生为受试者,随机将其分为对照组(去咖啡因的某维生素饮料)16例和咖啡因干预组(含咖啡因的某维生素功能饮料)19例。所有受试者干预前后开展PWC170机能试验、血清β-内啡肽水平测定、疲劳程度指数测定、背肌力和握力测试、15 s反弹跳测试及模拟篮球比赛测定。结果干预前,所有受试者PWC170、β-内啡肽水平、疲劳程度指数、背肌力、右手和左手握力、弹跳次数、弹跳最高高度及弹跳总高度、模拟篮球比赛中移动距离、平均速度、平均移动速度和最快速度比较,差异均无统计学意义(P>0.05);干预后,咖啡因干预组受试者PWC170、15 s反弹跳测试中弹跳最高高度、模拟篮球比赛中平均移动速度均较对照组显著增加,差异均有统计学意义(P<0.05)。结论饮用含咖啡因的维生素功能饮料可以适当提高人体运动行为能力。     

水生真菌YMF1．01029毒杀线虫活性代谢产物的研究

从云南抚仙湖水中腐木上筛选、分离得到一株能毒杀线虫的水生真菌Coelomycetes sp.YMF1.01029.从此拮抗菌株的发酵液中分离得到了5个活性成分,通过UV、IR、MS、1H-NMR、13C-NMR、DEPT、1H-1H COSY、HMQC和HMBC等波谱分析,鉴定其结构分别与preussomerin C(1)、preussomerin D(2)、preussomerin E(3)、(4RS)4,8-dihydroxy-3,4-dihydronaphthalen-1(2H)-one(4)和4,6,8-trihydroxy-3,4-dihydronaphthalen-1(2H)-one(S)相同.首次报道这5个化合物对线虫的毒杀活性.     

银杏叶提取物改善反复脑缺血再灌注小鼠血液流变学的作用

目的：研究银杏叶提取物（ＥＧＢ）改善反复脑缺血再灌注小鼠血液流这的作用。方法：采用反复脑缺血再注模型鼠,应用毛细管微量热沉法和毛细管微量法分别检测血纤维蛋白原含量和红细胞压积数值,并将结果输入全自动血液流变仪得出血浆粘度、血液粘度、血细胞聚集系数,血栓形成系数及微循环滞留时间（ＭＳＴ）。结果：ＥＢＧ２５￣１００ｍｇ／ｋｇ均可不同程度地降低Ｆｉｂ、ＨＣＴ、降低ηｂ、ηｐ、ηｈ,缩小ＶＡＬ及ＴＷＥＬ,