表面等离子体共振技术研究肝素对高迁移率族蛋白1与晚期糖基化终产物受体亲合力的影响

测定肝素与高迁移率族蛋1(HMGB1),及其与晚期糖基化终产物受体(RAGE)的亲和力,探讨肝素对HMGB1/RAGE亲和力的影响.用表面等离子体共振技术,实时分析肝素与HMGB1,HMGB1与RAGE的亲和常数,利用其binding analysis分析肝素对HMGB1/RAGE配受体结合的影响.肝素与HMGB1的动力学速率常数ka=1.78×105 L·(mol·s)-1,kd=8.02×10-4·s-1,亲和常数KA=2.22×108L·mol-1,KD=4.5×10-9 mol·L-1;HMGB1与RAGE的动力学常数ka=1.85×103L·(mol·s)-1,kd=1.81×10-4·s-1,亲和常数KA=1.02×107L·mol-1,KD=9.77×10-8mol·L-1.肝素与RAGE的亲和力极低.当浓度分别为50,100,1 000,10 000 U·L-1的肝素与HMGBl混合后,后者与RAGE的亲和力下降.上述不同浓度的肝素对HMGB1/RAGE亲和力的影响没有显著差异.结果表明,肝素可与HMGB1结合并影响后者与RAGE的亲和力,该作用并不与肝素浓度呈正相关.     

ESTABLISHMENT OF A GROUP OF MURINE LEUKEMIC CELL LINES AND INVESTIGATION OF THEIR BIOLOGICAL CHARACTERISTICS

An in vitro-vivo technique for establishment of cell lines on murine leukemia has beendeveloped. Using this method, suppressive T lymphoblastic leukemia L7811-85, L7212-85, non-T, non-B lymphocytic leukemia L1210-86, B lymphocytic leukemia P 388-86 and Friend erythroleu-kemia FLCL cell lines have been established. Incidence of leukemia with these cell lines was 100%. Along with the increase of genera-tions of cell lines, cell growth accelerated, generation time shortened and cloning efficienciesrose. A following up electron microscopic observation on L7811-85 and L7212-85 showed thatthe virus particles were "A" particles in original cells. When they became cell lines in vitro,virus particles increased and transformed into typical "C" particles with budding. An inhibitory activity relevant to leukemic cells on proliferation of leukemic cells hasbeen observed in the supernatant of L7811-85 medium and was regarded as an "autocrine".     

GC—MS定量测定大鼠血,脑中的氯胺酮和二甲苯胺噻嗪

描述了大鼠血、脑中氯胺酮和二甲苯胺噻嗪同时测定的定量分析方法。该法用溶剂同时提取血中或脑中的氯胺酮和二甲苯胺噻嗪,并在气相色谱上与杂质有效分离。方法简单、可靠、灵敏度高。已用于给药后大鼠血、脑中氯胺酮和二甲苯胺噻嗪的定量测定,得到了有意义的结果。     

高效液相色谱法快速,灵敏测定尿中3—甲基组氨酸含量

本文报道用柱前衍生高液相色谱法快速，灵敏地测定尿中３－甲基组氨酸（３ＭＨ）。采用含３０％乙腈的１０ｍｍｏｌ／Ｌ磷酸钠缓冲液（ｐＨ＝７．５）为流动相，等梯度洗脱，１０ｍｉｎ内即可分析一个样品；在２０－３０００ｐｍｏｌ范围内，３ＭＨ线性相关系数为０．９９８６，相对标准偏差为２．３％（批内）和４．５％（批间）；并测定了１０名正常人尿中的３ＭＨ含量。     

修饰壳聚糖吸附低密度脂蛋白前后血浆中铜锌钙镁含量的变化

本文采用自制的修饰壳聚糖吸附剂对血浆中的低密度脂蛋白进行吸附后，用火焰原子吸收光谱法检测吸附前后血浆中Cu,Zn,Ca,Mg含量。为了减小血浆的用量，采用微量脉冲法进样，进样体积仅需100－200μl，血浆样品经稀释后直接测定。平均回收率为98．0－101．0％。相对标准偏差为1．89－4．27％。Cu,Zn,Ca,Mg的检出限分别为0.025,0.028,0.023,0.005μg/ml。方法简便，快速，需样量少，可同时多个元素。     

Synthesis and Structure of Inclusion Complex of Cyclomaltoheptaose（β—Cyclodextrin）with m—Aminophenol

ＩｎｔｒｏｄｕｃｔｉｏｎＳｕｐｒａｍｏｌｅｃｕｌｅｉｓａｋｉｎｄｏｆｓｙｓｔｅｍｗｉｔｈｓｐｅｃｉａｌｓｔｒｕｃ ｔｕｒｅｄｅｐｅｎｄｉｎｇｏｎｔｈｅｗｅａｋｍｏｌｅｃｕｌａｒｉｎｔｅｒａｃｔｉｏｎｓ (ｓｕｃｈａｓｖａｎｄｅｒＷａａｌｓ ,ｈｙｄｒｏｇｅｎｂｏｎｄ ,ｅｌｅｃｔｒｏｓｔａｔｉｃａｎｄｈｙ ｄｒｏｐｈｏｂｉｃｉｎｔｅｒａｃｔｉｏｎｓ) .Ｔｈｅｗｅａｋｉｎｔｅｒａｃｔｉｏｎｓａｒｅｒｅｌａｔｅｄｔｏｂｉｏｌｏｇｉｃａｌｐｒｏｃｅｓｓｅｓ ,ｆｏｒｅｘａｍｐｌｅ ,ｔｈｅｃａｔａｌｙｔｉｃｒｅａ…     

Studies on Chromatography Fingerprint of Hongqi by High-performance Liquid Chromatography

Chromatography fingerprint (CFP) of 10 samples of hongqi were studied. 23 commonpeaks were analyzed, their average similarity was 97.29%. CFP were positioned with main indexcomposition such as formononetin, calycosin and then the contents of index composition weredetermined. The character and exclusive of CFP of 10 samples of hongqi were clear. CFP andcontent determination of index composition of hongqi could be used to evaluate the quality of hongqicomprehensively.     

The Reduction of a Natural Diterpene Containing a, B-Unsaturated Keto Group

Hedychenone (1), a diterpene containing a, B-unsaturated keto group, was reduced by aluminum-mercury alloy, and a dimerized product (2) was obtained as the major product. The coupling occurred at B position of the keto group.     

Two new phenethanol glycosides from Ligustrum robustum

Two new phenethanol glycosides,named ligurobustoside P（1）,ligurobustoside Q（2） have been isolated from the leaves of Ligustrum robustum,together with the known compound angoroside A（3） which was firstly isolated from this species.The structures of the two new phenethanol glycosides（1-2） were elucidated by a combination of high-resolution electron ionization mass spectrometry（HR-ESI-MS）,¹H NMR,¹³C NMR,HMQC,and HMBC spectra for the first time.     

应用分子全息QSAR预测多溴二苯醚(PBDEs)的毒性

多溴二苯醚(PBDEs)可能会激活芳香烃受体的信号传导通路, 从而对人类和野生动物的健康产生负面影响. 鉴于多溴二苯醚实验毒性数据有限, 发展基于结构的化合物毒性预测模型具有重要的实际意义. 本文基于一种新的分子结构表征方法—— 分子全息, 研究了18种多溴二苯醚结构与毒性之间的关系, 建立了相关性显著、稳健性强的QSAR模型(r²= 0.991, q²_LOO= 0.917). 随机选出14种多溴二苯醚为训练集, 其他4种化合物为测试集以验证分子全息QSAR模型的稳健性和预测能力. 结果在最佳建模条件下得到模型的统计参数如下：r² = 0.988, q²_LOO = 0.598, r²_pred = 0.955, 预测值与实验值之间的均方根误差(RMSE)为0.155. 这表明基于分子全息的QSAR模型可以对多溴二苯醚毒性进行比较准确的预测. 本文同时利用分子全息QSAR模型色码图, 探讨了影响多溴二苯醚毒性的分子结构特征及分子机理.