指末节断离再植探讨

目的：探讨基层医院无显微吻合技术指末节断离再植的成活率。方法：通过38例45指末节断离再植，采用静脉留置针头鞘多侧孔减压引流，进行临床资料分析探讨。结果：45指末节断离再植，成活37指占82.22%，失败8指占17.77%.结论：指末节断离再植，采用静脉留置针头鞘多侧孔减压引流，起血液循环架桥式的作用，人为建立血液循环，提高指末节断离再植成活率。     

Mechanisms underlying vasorelaxant action of astragaloside IV in isolated rat aortic rings

1. Astragaloside IV is a component from the widely used traditional Chinese herb Astragalus membranaceus and its effect on rat aortic ring contraction and relaxation were investigated. 2. The aorta from male Sprague-Dawley rats was isolated in an organ bath and ring tension was recorded with or without endothelium. Cumulative effects of astragaloside IV on vessel contraction and relaxation were observed in the presence of various antagonists related to vessel activity. 3. Astragaloside IV showed concentration-dependent inhibition of vessel contraction induced by phenylephrine and potassium chloride. The amount of calcium released from intracellular stores sensitive to phenylephrine was also markedly reduced by astragaloside IV. There was dose-dependent vasorelaxation in endothelium-intact rings, which was partly inhibited by pre-incubation with nitric oxide (NO) synthase (NOS) Nomega-nitro-L-arginine methyl ester and guanylate cyclase inhibitor, 1H-[1,2,4] oxadiazolo [4,3-alpha] quinoxalin-1-one. Astragaloside IV also induced a significant increase in aortic tissue content of guanosine 3",5"-cyclic monophosphate (cGMP) both in vivo and in vitro. Endothelial NOS inhibitor Nomega-nitro-L-arginine prevented vasodilatation, whereas neuronal NOS inhibitor 7-nitroindazole did not show significant influence on the vessel relaxation of astragaloside IV. 4. In conclusion, astragaloside IV inhibited vessel contraction through blocking calcium influx and intracellular calcium release. The endothelium-dependent vessel dilation of astragaloside IV was attributed mainly to the endothelium-dependent NO-cGMP pathway.     

Cell-penetrating peptide-doxorubicin conjugate loaded NGR-modified nanobubbles for ultrasound triggered drug delivery

A new drug-targeting system for CD13⁺ tumors has been developed, based on ultrasound-sensitive nanobubbles (NBs) and cell-permeable peptides (CPPs). Here, the CPP-doxorubicin conjugate (CPP-DOX) was entrapped in the asparagine–glycine–arginine (NGR) peptide modified NB (CPP-DOX/NGR-NB) and the penetration of CPP-DOX was temporally masked; local ultrasound stimulation could trigger the CPP-DOX release from NB and activate its penetration. The CPP-DOX/NGR-NBs had particle sizes of about 200?nm and drug entrapment efficiency larger than 90%. In vitro release results showed that over 85% of the encapsulated DOX or CPP-DOX would release from NBs in the presence of ultrasound, while less than 1.5% of that (30?min) without ultrasound. Cell experiments showed the higher cellular CPP-DOX uptake of CPP-DOX/NGR-NB among the various NB formulations in Human fibrosarcoma cells (HT-1080, CD13⁺). The CPP-DOX/NGR-NB with ultrasound treatment exhibited an increased cytotoxic activity than the one without ultrasound. In nude mice xenograft of HT-1080 cells, CPP-DOX/NGR-NB with ultrasound showed a higher tumor inhibition effect (3.1% of T/C%, day 24), longer median survival time (50 days) and excellent body safety compared with the normal DOX injection group. These results indicate that the constructed vesicle would be a promising drug delivery system for specific cancer treatment.     

丹参和透明质酸钠注射液对骨性关节炎治疗作用的实验研究

采取家兔膝关节制动方法建立骨性关节炎动物模型，用丹参注射液和透明质酸钠注射液关节腔内注射进行治疗，分别在制动后3、6、9周测量关节活动度，取关节软骨制成标本经光镜和透射电镜观察。结果显示，与单纯制动组比较，丹参治疗组和透明质酸钠治疗组的关节活动度明显改善，关节病变出现晚，程度轻，以早期最明显。表明丹参和透明质酸钠具有延缓和减轻关节退变的作用，对骨性关节炎早期有一定的治疗作用。     

Tunable Boc modification of lignin and its impact on microbial degradation rate

A new type of modified lignin, lignin-p-Boc, was obtained through reaction with di-tert-butyl dicarbonate (Boc₂O) in aqueous media catalyzed by 4-dimethylaminopyridine (DMAP). Boc modification occurred regardless of type of lignin, was tunable, and proceeded well in recovering lignin at high purity from sodium lignosulfonate (a common byproduct from pulping industry; lignin content: 60%). Lignin-p-BOC was demonstrated as a potential reactive filler in green plastic and as a potential crosslinker in design of bioresorbable composite polymeric implants. Furthermore, the effect of the modification on breakdown rate of alkali lignin by microbes was investigated, and results showed that the modification substantially decreases the breakdown rate. The tunable Boc modification process was designed via a system thinking, including availability of raw lignin, economical/green modification, potentiality of drop-in-change to current thermoplastic processing, modification impact on microbial degradability/disposed environment at the end of use life; hence the holistic consideration makes this alternative method for upgrade of technical lignins very practical for future industrial application. Via “in-situ” forming “easily breakable covalent bonds” with existing thermopolymers inside, Lignin-p-BOCs are also promising to play an important role as both excellent binders via “random match” and reductants in transforming linear plastic waste into circular plastics.     

甲硝唑、维生素B2、珍珠粉等配伍治疗口腔溃疡临床研究

目的:探讨甲硝唑、维生素B2、珍珠粉等配伍治疗口腔溃疡的疗效.方法:选取200例于2014年6月1日~2016年6月1日我院接收的复发性口腔溃疡患者,随机分为对照组(给予西瓜霜喷剂治疗,n=100)与观察组(采用甲硝唑、维生素B2、珍珠粉等配伍治疗,n=100),观察两组疗效.结果:治疗7d后,观察组临床总有效率较对照组显著要高(P<0.05),复发率显著低于对照组(P<0.05);观察组疼痛感消除时间、溃疡治愈时间均较对照组显著要短(P<0.05);治疗后,两组外周血CD4+、CD4+/CD8+水平明显升高,观察组升高幅度较对照组显著(P<0.05).结论:复发性口腔溃疡采取甲硝唑、维生素B2、珍珠粉、山茶油配伍治疗,疗效显著,具有推广价值.     

固相法合成心肌兴奋肽及其类似物

用Boc-和Tos-基团分别保护氨基和侧链胍基,以1%交联度聚苯乙烯二苯甲氨基树脂为载体,用DCC固相法合成肽,HF断裂肽树脂键和去除侧链保护基团,粗产物经高效液相层析纯化,合成了心肌兴奋肽Phe-Met-Arg-Phe-NH_2及其类似物Phe-Pro-Arg-Phe-NH_2,并观察了此二种肽对大鼠血压和心率的影响。     

银杏叶提取物体外对铜离子诱导的人血清低密度脂蛋白氧化修饰的抑制作用(英文)

本文在体外对EGb761能否抑制钢离子诱导的人血清低密度脂蛋白氧化修饰进行了研究。低密度脂蛋白（LDL）用EGb76140,80,160mg·L(-1)‘预处理1h,然后用CuSO410μmol·(-1)氧化修饰10h。结果表明LDL被钢离子氧化修饰后低密度脂蛋白中维生素E（VE）被耗竭,丙二醛（MDA）及自身荧光物质（LF）含量升高,载脂蛋白B（apoB）的电泳迁移速率加快。EGb761剂量依赖性地抑制VE的含量降低和MDA及自身荧光物质的含量升高,载脂蛋白B的电泳迁移速率依次减慢。可见在体EGb761能抑制钢离子诱导的人血清低密度脂蛋白氧化修饰。     

ω-3鱼油脂肪乳对胃肠肿瘤术后患者免疫功能影响的Meta分析

目的 评价ω-3鱼油脂肪乳对胃肠肿瘤术后患者免疫功能的影响。方法 检索Pubmed、EMbace、MEDLINE、万方和CNKI等数据库,经筛选纳入符合要求的随机对照研究（RCT）,用修改后Jadad评分评价纳入研究质量,并提取需要的研究数据,采用Revman 5.3进行统计分析。结果 共纳入12篇RCT研究,共848例胃肠肿瘤术后患者,分析结果显示鱼油脂肪乳能显著增加CD3⁺T细胞[WMD=5.79,95% CI（3.07,8.50）,P<0.01]和CD4⁺T细胞[WMD=6.22,95% CI（3.85,8.59）,P<0.01]水平,减低CD8⁺T细胞水平[WMD=-1.74,95% CI（-2.96,-0.52）,P<0.01]。结论 ω-3鱼油脂肪乳加强的肠外营养对胃肠肿瘤术后患者免疫功能有增强作用。