天蚕素A截短肽在大肠埃希菌中的高效表达及活性分析

将构建好的含抗菌肽天蚕素A(cecropin A,CA)截短肽CA19(36、210)1～5倍串连体的pET-31b(+)载体进行诱导表达,其表达量比单体表达明显提高.将融合蛋白用亲和层析法将其纯化,其纯度达到90%以上.纯化融合蛋白免疫BALB/c小鼠,制备了其特异的多克隆抗体.纯化串连融合蛋白用溴化氰切割成单体检测其活性,发现均具有抑菌活性.本研究为抗菌肽的基因工程制备提供了新途径.     

高效液相色谱法测定北刘寄奴药材中木犀草素和毛蕊花糖苷的含量(英文)

建立了北刘寄奴药材中木犀草素和毛蕊花糖苷的反相高效液相含量测定方法。采用Agilent Zorbax SB-Aq C18 column (250 mm×4.6 mm, 5 μm) 色谱柱; 0.05%磷酸 (A) 和甲醇 (B) 梯度洗脱; 流速1.0 mL/min; 检测波长310 nm和350 nm。木犀草素和毛蕊花糖苷分别在0.0341-0.8172 mg/mL (r2 = 0.9999)和0.0708-2.832 mg/mL (r2 = 0.9999)范围内与峰面积呈良好的线性关系。平均加样回收率分别为102.7%和98.3%。15批北刘寄奴药材中木犀草素和毛蕊花糖苷的含量差异明显。本文首次报道了北刘寄奴药材中毛蕊花糖苷的含量测定方法。     

脑钠肽联合胱抑素C检测在慢性心力衰竭患者中的应用

目的探讨脑钠肽联合胱抑素C检测在慢性心力衰竭患者中的应用效果及价值。方法随机抽取我院在2012年5月-2013年5月期间收治的慢性心力衰竭患者63例的临床资料进行回顾性分析,将本组患者按照检测方法的不同分为三组,A组、B组和C组,每组A组例行单纯的胱抑素C检测,B组例行单纯的脑钠肽检测,C组例行脑钠肽、胱抑素C联合检测,针对三组患者的检测结果以及在慢性心力衰竭患者诊断中的应用效果进行系统评价。结果A组诊断正确率为71．4％,B组诊断正确率为66．7％,C组诊断正确率为95．2％,A组和B组的诊断结果差异不显著,不具有统计学意义（P〉O．05）;C组诊断正确率明显高于A组和B组,差异显著,具有统计学意义（P〈0．05）。结论采用脑钠肽,胱抑素c联合检测应用慢性心力衰竭患者的诊断,可以有效地提高诊断准确率,为慢性心力衰竭患者正确诊断与治疗提供科学依据,值得临床推广与应用。     

EMIT法和FPIA法监测全血环孢素A浓度相关性比较

目的 比较酶放大免疫法(EMIT)与荧光偏振免疫法(FPIA)监测全血中环孢素A(CsA)浓度的测定结果,并进行相关性分析.方法 收集126例/次临床使用环孢素A的患者稳态浓度血样,分别用EMIT法及FPIA法测定,并考察两种方法测定结果的相关程度.结果 2种不同方法测定CsA血药浓度平均值(x±s)分别为EMIT法:(205.77±117.65)ng/mL;FPIA法:(186.49±112.16)ng/mL,以SPSS 19.0对经对数转换后的两组浓度数据进行配对样本T佥验,其P=0.00,即两种测定方法有显著性差异.将患者分为肾移植组(63例/次),肝移植组(17例/次),干细胞移植组(31例/次),肾病综合征组(15例/次).以SPSS19.0对四组浓度数据分别进行组内的配对样本T检验,得到肾移植组与肝移植组P＜0.05,差异具统计学意义.干细胞移植组与肾病综合征组P＞0.05,差异无统计学意义.结论 对CsA进行治疗药物监测时应考虑不同分析方法的影响.     

Endoscopic transnasal canaliculorhinostomy for refractory common canalicular obstruction with an unidentifiable lacrimal sac

AIM: To compare the safety and efficacy of conventional versus accelerated (9 mW/cm2) CXL in progressive keratoconus at the 2-year follow-up. METHODS: In this prospective study, consecutive progressive keratoconus patients were randomized to receive either conventional CXL (CCXL) or accelerated CXL (ACXL, using hydroxypropyl methylcellulose-assisted riboflavin imbibition for 10min) at 9 mW/cm2. Visual, refractive, keratometric, topographic, and aberrometric outcomes and stromal demarcation line depth (DLD) measurements were compared at the end of a 2-year follow-up. RESULTS: Thirty-two eyes from 32 patients in the CCXL and 27 eyes from 27 patients in the ACXL groups completed 2-year follow-ups. At 2 years post-CXL, both uncorrected and corrected visual acuities improved significantly in both groups. The improvements in keratometric readings, flattening rate (flattening of the Kmax more than 1D), 3 topographic indices, and vertical coma were significantly better in the CCXL group compared to the ACXL group (P<0.05). The DLD as measured by anterior segment optical coherence tomography or in vivo confocal microscopy was better detectable and significantly deeper in the CCXL group compared to the ACXL group. The deeper DLD was found to be significantly correlated with improvements in the mean keratometry measurements. Progression was noted in 11.1% of eyes in the ACXL group, whereas progression was not observed in any patient eye in the CCXL group. CONCLUSION: In this prospective randomized study, ACXL was less effective in halting the progression of keratoconus at a 2-year follow-up compared to CCXL.     

灯盏花素对大鼠脑缺血再灌注后血管活性物质的影响

目的观察灯盏花素对大鼠急性脑缺血再灌注后血浆和脑组织ET、TXB2、6-keto-PGF1α含量的影响。方法选用Wistar大鼠制作Pulsinelli四血管阻断(4VO)脑缺血再灌注模型,以川芎嗪为对照,采用放射免疫法测定灯盏花素对大鼠脑缺血再灌注后血浆和脑组织ET、TXB2、6-Keto-PGF1α含量的影响。结果灯盏花素能显著降低脑缺血再灌注后血浆和脑组织ET、TXB2含量及TXB2/6-Keto-PGF1α比值。结论灯盏花素通过改变血管活性物质的含量从而对急性脑缺血再灌注损伤具有保护作用。     

武当山何首乌及其混伪品的鉴定研究进展

通过对武当山何首乌作用情况的调查,发现何首乌混伪品５种;将头花千金藤误作何首乌钐,极易发生中毒,就彻底纠正;将凝胶电泳、ＵＶ、ＩＲ光谱技术应用于何首乌及其混伪品鉴别之中,编制出鉴别检索表,使鉴定方法更趋完善;“人形雌雄何首乌”属无稽之谈,植物块根不可能分化出人体五官、性别特征;经考证,古时的何首乌混淆品宕芋,即为现今的冀蓼;探讨何首乌种混淆的历史渊源,分析将“雌雄”引用于中药名称中的利与弊,防止产     

Xanthone glycosides from Polygala tenuifolia and their conformational analyses

Seven xanthone glycosides were isolated from the cortexes of Polygala tenuifolia, and their structures were identified as polygalaxanthones VIII-XI (1-4), sibiricoxanthone B (5), 7-O-methylmangiferin (6), and lancerin (7), on the basis of spectroscopic analyses. Compounds 1-4 are new xanthone glycosides, and compounds 4 and 5 exist as rotamers. To explain this phenomenon, conformational analyses were performed on compounds 4 and 5 and other compounds with similar skeletons that were isolated from P. tenuifolia.