JiTT模式在生物化学综合性实验教学中的应用

目的　探讨适时教学（just-in-time-teaching,JiTT）在生物化学综合性实验（血清γ-球蛋白的分离提纯与鉴定）教学中的应用及效果。方法　选取我校2016级临床医学本科专业100人作为研究对象,平均分为对照组和实验组。对照组（50人）采用传统教学,实验组（50人）采用JiTT。实验组课前3~5天,教师把微视频、导学案等资源上传到网络教学平台或网络学习交流组,构建在线学习交流和反馈环境;课上包括个人测试、教师面对面授课、小组讨论、完成实验报告和答疑解惑等环节,以检验和反馈学生自学情况。采用SPSS 22.0统计两组学生测试成绩与问卷结果,组间数据比较行t检验。结果　实验组个人测试平均得分为（9.44±0.59）,高于对照组的（8.77±0.41）分,差异有统计学意义（P=0.00）。在问卷关于学习效果评价的6项内容中,实验组学生对JiTT的评分均高于对照组对传统教学的评分,差异有统计学意义（P<0.05）。结论　JiTT有助于提升生物化学实验教学质量,值得在其他专业基础课程中尝试。     

A Case of Linear Exacerbation of Atopic Dermatitis with Secondary Prurigo Nodularis

Inflammatory acquired Blaschko-linear dermatoses (IABLD) are a continuous concept involving diseases such as lichen striatus, blaschkitis, and atopic dermatitis. However, atopic dermatitis that showed increase in severity along Blaschko lines is rarely reported on its own. Herein, we report a rare case of atopic dermatitis with secondary prurigo nodularis along Blaschko lines, which may be valuable in broadening the concept of IABLD. A 28-year-old male presented with multiple, pruritic, brownish nodules on the left lower extremity along Blaschko lines for 3 to 4 years. The patient had atopic dermatitis since childhood. Histopathologic findings revealed compact orthohyperkeratosis, hypergranulosis, spongiosis, and irregular acanthosis in the epidermis. Fibrosis with vertically arranged collagen fibers and perivascular lymphohistiocytic infiltration were shown in the upper dermis. We diagnosed the case as secondary prurigo nodularis along Blaschko lines, accompanied by the preceding atopic dermatitis. We hypothesized that the patient’s underlying atopic dermatitis increased in severity along Blaschko lines, and prurigo nodularis occurred due to frequent scratching. The lesions improved with topical methylprednisolone cream, oral antihistamines and intralesional triamcinolone injection.     

Two new phenolic acids from Drynariae rhizoma

To study the chemical constituents of Drynariae Rhizoma, nine phenolic acids were isolated from a 70% ethanol extract by using a combination of various chromatographic techniques including column chromatography over silica gel, ODS, Sephadex LH-20, and semi-preparative HPLC. By spectroscopic techniques including 1H NMR, 13C NMR, 2D NMR, and HR-ESI-MS, these compounds were identified as 4, 4'-dihydroxy-3, 3'-imino-di-benzoic acid (1), protocatechuic acid (2), gallic acid (3), p-hydroxybenzoic acid (4), (E)-caffeic acid (5), ethyl trans-3, 4-dihydroxycinnamate (6), caffeic acid 4-O-beta-D-glucopyranoside (7), p-coumaric acid 4-O-beta-D-glucopyranoside (8), and 23(S)-12-O-caffeoyl-12-hydroxyllauric acid glycerol ester (9), separately. Among them, 1 and 9 are new compounds, and 3, 4, and 6 were isolated from Drynaria species for the first time.     

降钙素基因相关肽介导的离体大鼠心脏缺血预处置

降钙素基因相关肽介导的离体大鼠心脏缺血预处置１肖洲生，李元建２，邓汉武（湖南医科大学药理教研室，长沙４１００７８，中国）关键词降钙素基因相关肽；心肌再灌注损伤；心功能试验；肌酸激酶目的：研究降钙素基因相关肽（ＣＧＲＰ）在离体大鼠心脏缺血预处置（ＰＣ）...     

我院近10年铜绿假单胞菌的分离及耐药性分析

目的了解我院近10年铜绿假单胞菌的分离情况及耐药特点。方法细菌鉴定用VITEK全自动微生物鉴定仪，药敏试验用纸片琼脂扩散法，结果在分离出的5966株革兰氏阴性杆菌中，铜绿假单胞菌为1844．株(30．9％)，占第一位；铜绿假单胞菌在各类标本中的检出率以痰液最高(66．1％)，其次是分泌物(17．5％)和中段尿(12．6％)：铜绿假单胞菌对13种抗生素的药敏结果显示，耐药率小于30％的抗生素只有亚胺培南(12．7％)、头孢他啶(25．3％)和头孢吡肟(25．6％)，其余10种抗生素的耐药率在33．1％-80．9％。结论铜绿假单胞菌的分离率及耐药率高，治疗该菌感染应根据临床分离株耐药性检测结果选用亚胺培南、头孢他啶、头孢吡肟、阿米卡星等敏感药物及联合用药，合理使用抗生素。     

高压氧辅助治疗突发性聋疗效观察

目的:观察高压氧辅助治疗突发性聋的疗效,并进一步探讨突发性聋的综合治疗方法。方法72例突发性聋患者随机分为高压氧组和对照组,均用药物治疗,高压氧组在常规药物治疗基础上行高压氧治疗,结果与对照组进行比较。结果:高压氧辅助治疗组的临床恢复疗效,与对照组比较有显著性差异(P<0.05)。结论:高压氧可作为一种辅助手段治疗突发性聋,效果显著。     

HPLC法测定盐酸索他洛尔片的含量

目的：建立测定盐酸索他洛尔片含量的HPLC测定法。方法：采用Nova-PakC18色谱柱；以0.02%庚烷磺酸钠（稀磷酸调pH3.0）-乙腈（80：20）为流动相；检测波长为228nm。结果：在10.3-92.8цg/ml的浓度范围内线性关系良好，r=0.9999，平均回收率为99.95%（n=5），RSD=0.60%。重复进样RSD=0.2%(n=5)。结论：本方法简便、快速、准确，重现性好，适用于盐酸索他洛尔片的含量测定及其质量控制。     

替米沙坦油水分配系数的测定及其意义

目的:测定替米沙坦的油水分配系数,预测并解释其在人体内的吸收、分布、排泄情况。方法:以正辛醇-水为模拟系统,采用摇瓶法-紫外分光光度法,在232 nm 波长处测定分配平衡后油相中药物浓度,由此计算替米沙坦的油水分配系数。结果:在正辛醇-水体系中,pH=7.29时替米沙坦的油水分配系数 lgP=2.22。结论:应用摇瓶-紫外分光光度法,能够准确测定替米沙坦的油水分配系数,并由此推测其体内过程。     

Comparison of TGF-β, PDGF,and CTGF in hepatic fibrosis models using DMN,CCl4, and TAA

Three chemotoxins including dimethylnitrosamine (DMN), carbon tetrachloride (CCl₄), and thioacetamide (TAA) are commonly used in hepatofibrotic models. We aimed to draw characteristics of histopathology and pro-fibrogenic cytokines including TGF-β, PDGF and CTGF among three models. Rats were divided into six groups and intra-peritoneally injected with DMN (10?mg/kg, for three weeks, three consecutive days weekly), CCl₄ (1.6?g/kg, for 10 weeks, twice weekly), TAA (200?mg/kg, for 12 weeks, twice weekly) or their corresponded treatment for each control group. The liver weights were decreased in DMN model, but not other models. Ascites were occurred as 3-, 2-, and 7-rats in DMN, CCl₄, and TAA model, respectively. The lipid peroxidation was highest in CCl₄ model, serum levels of liver enzymes were increased as similar severity. The hepatofibrotic alterations were remarkable in DMN and TAA model, but not CCl₄ as evidenced by the Masson trichrome staining and hydroxyproline. The immunohistochemistry for α-SAM showed that the DMN model was most severely enhanced than other models. On the other hand, hepatic tissue levels of pro-fibrogenic cytokines including TGF-β, PDGF, and CTGF were generally increased in three models, but totally different among models or measurement resources. Especially, serum levels of three cytokines were remarkably increased by CCl₄ injection and CTGF levels in both hepatic tissue and serum were highest in CCl₄ group. Our results firstly demonstrated comparative study for features of morphological finding and pro-fibrogenic cytokines in serum and hepatic protein levels among three models. Above results would be a helpful reference for hepatofibrotic studies.