阿苯达唑聚氰基丙烯酸正丁酯纳米粒的制备、性质及其组织靶向性研究阿苯达唑聚氰基丙烯酸正丁酯纳米粒的制备、性质及其组织靶向性研究

目的制备阿苯达唑聚氰基丙烯酸正丁酯纳米粒（albendazole polybutycyanocrylate nanoparticles，ABZ-PBCA-NP）TDDS给药系统，并考察相关特性及组织分布靶向性。方法种子乳化聚合法制备阿苯达唑纳米粒；等温吸附法考察纳米粒载药特性；动态透析法研究4种制剂的体外释药动力学；同位素标记阿苯达唑纳米粒在小鼠脏器组织分布和生物利用度。结果ABZ-PBCA-NP体外释药遵循Higuchi方程，加入PVP制成的载药纳米粒符合双指数函数。纳米粒的载药方式遵循Langmuir吸附方程。小鼠ig ³H-ABZ-PBCA-NP后, 药物的肝、脾中的靶向指数分别为11.4和3.9，阿苯达唑纳米粒和混悬剂相对生物利用度分别为76.0%和36.9%。结论制备纳米粒加入PVP可使药物具吸附性和分散性，纳米粒载体可降低药物与血浆蛋白结合率，增强药物的肝、脾脏器靶向性和延缓释药。     

肝内局部用FMC Seakem HGT Agarose-卡铂合剂的体外释放试验

OBJECTIVETo investigate sustained release tested in vitro FMC SeaKem HGT Agarose-carbplatin mixture for the local intra-live. METHODTo establish the mode of the dissolution rate testing for the drug implanting in the local intra-liver. Improved the Flo     

Genetic Variations in Bone Density, Histomorphometry, and Strength in Mice

The purpose of this study was to assess breed-related differences in bone histomorphometry, bone biomechanics, and serum biochemistry in three mouse breeds shown to differ in bone mineral density (BMD) (as measured by DXA) and bone mineral content (BMC). Femurs, tibiae, and sera were collected from 16-week-old C3H/HeJ {C3H}, C57BL/6J {BL6}, and DBA/2J {DBA}mice (n = 12/breed). Data collected included BMC and BMD (femora), histomorphometry of cancellous (distal femur) and cortical bone (diaphyseal tibiae and femora), bone strength (femora), and serum alkaline phosphatase (ALP). Consistent with previous reports, BMC and BMD were higher in C3H than in BL6 or DBA mice. The higher BMD in the C3H breed was associated with greater cancellous bone volume, cortical bone area, periosteal bone formation rate, biomechanical strength, and serum ALP. However, mid-diaphyseal total femoral and tibial cross-sectional area and moment of inertia were greatest in BL6, intermediate in C3H, and lowest in DBA mice. The specific distribution of cortical bone in C3H, BL6, DBA mice represents a difference in adaptive response to similar mechanical loads in these breeds. This difference in adaptive response may be intrinsic to the adaptive mechanism, or may be intrinsic to the bone tissue material properties. In either case, the bone-adaptive response to ordinary mechanical loads in the BL6 mice yields bones of lower mechanical efficiency (less stiffness per unit mass of bone tissue) and does not adapt as well as that of the C3H mice where the final product is a bone with greater resistance to bending under load. We suggest that the size, shape, and BMD of the bone are a result of breed-specific genetically regulated cellular mechanisms. Compared with the C3H mice, the lower BMD in BL6 mice is associated with long bones that are weaker because the larger cross-sectional area fails to compensate completely for their lower BMD and BMC. Received: 16 November 1999 / Accepted: 19 April 2000 / Online publication: 27 July 2000     

Effect of Complexation with Hydroxylpropyl-β-Cyclodextrin on Solubility, Dissolution Rate and Chemical Stability of Prostaglandin E1

Aim To study the effect of complexation with hydroxylpmpyl-β-cycledextrin (HP-β-CD) on the solubility, dissolution rate and chemical stability of pmstaglandin E1 (PGE1), thereby providing a basis for preparing a stable solid or aqueous preparation of PGF1 formulated with HP-β-CD. Methods The effect of HP-β-CD on the solubility of PGF1 was studied by phase solubility method. The formation of inclusion complexes of PGE1 with HP-β-CD in the aqueous solution was confirmed by UV spectra, circular dichroism spectroscopy, and that in the solid state by IR spectra and X-ray diffractometry. An solid inclusion complex of PGF1 with HP-β-CD was prepared by lyophilization. The dissolution rate and stability of the inclusion complex were determined and compared with those of PGE1 alone. Meanwhile, the stability of PGF1 aqueous solutions in the presence of HP-β-CD was studied under different pH conditions. Results The solubility of PGF1 increased linearly with increasing HP-β-CD concentration in various pH buffered solutions, showing typical AL-type phase solubility diagrams. The stability and dissolution rate of the solid inclusion complex of PGE1 were significantly increased, compared with those of pure PGE1 . The stability of PGEI in HP-β-CD solutions was also obviously improved under acidic and basic conditions, but the stabilizing effect was absent under neutral conditions. Conclulsions The solubility, dissolution rate and chemical stability of PGE1 are markedly improved by complexation with HP-β-CD. It is quite possible to prepare a stable PGE1 inclusion complex-containing solid dosage forms, but almost impossible to obtain a stable aqueous preparation of PGE1 formulated with HP-β-CD.     

九岩散抗肿瘤作用的实验研究

目的 :观察九岩散对肿瘤小鼠模型和 3株人肿瘤细胞系的抑瘤作用。方法 :复制 HP2 2 、L ewis、S1 80 实体瘤模型 ,观察九岩散酒提、水提物的抑瘤作用 ;用 MTT法测定不同浓度九岩散对 3株人肿瘤细胞的抑瘤作用。结果 :九岩散对 HP2 2 、L ewis、S1 80 实体瘤小鼠及 3株人肿瘤细胞系均有不同程度的抑瘤作用 ,有明显量效关系。结论 :复方九岩散对实体瘤小鼠和体外人肿瘤细胞有较高的抑瘤作用     

胚芽滋养胶囊对流感病毒感染小鼠血清IL-2和淋巴细胞功能的影响

目的　观察胚芽滋养胶囊对流感病毒感染小鼠血清IL - 2水平和淋巴细胞功能的影响。方法　以流感病毒FM1株滴鼻感染小鼠制造模型 ,应用胚芽滋养胶囊进行预防和治疗 ,以病毒唑注射液为对照 ,观察感染小鼠血清IL - 2水平和淋巴细胞的增殖反应。结果　小鼠T淋巴细胞和B淋巴细胞增殖水平及血清IL - 2水平对照组明显下降 ,胚芽滋养胶囊预防组和治疗组明显提高。结论　胚芽滋养胶囊对于流感病毒FM1感染导致的血清IL - 2水平和淋巴细胞功能下降有一定的促进提高作用。     

灯台树种子萌发特性的研究

目的 研究灯台树种子萌发的最适宜条件和储藏时间，为大量人工繁殖灯台树苗木提供借鉴。方法 不同温度，不同光照时间，不同光质及不同储藏时间，测量灯台树种子的萌发率。结果 灯台树种子萌发的适宜温度为30℃～40℃，适宜的光照时间为8h，适宜的光质为黄光和日光，储藏时间为5个月以内最好。结论 灯台树种子是高温萌发型。     

微细化工艺制备的葛根微粉溶出度和生物利用度的研究

 目的 研究葛根微粉在溶出和生物利用度方面的效果,为微细化工艺在中药中的应用提供理论依据。方法 以葛根黄酮为指标,用紫外分光光度法测定葛根微粉和葛根粉在不同时间点葛根黄酮溶出的量,计算累积释放率;采用透析袋为屏障观察葛根微粉和葛根粉的溶出情况。按葛根素100mg·kg^-1体重分别给大鼠口服葛根微粉和提取物,用HPLC测定葛根素含量,以葛根提取物为对照,计算葛根微粉的相对生物利用度。结果 用桨法测定体外溶出度时,葛根微粉累积释放度显著高于葛根粉;用透析袋作为屏障时,两者差异不明显。葛根微粉的生物利用度是葛根提取物的50％强。结论 葛根制成微粉后,能改善其有效成分的溶出,但是与提取物相比,服药量大,生物利用度低,因此微米中药的应用有待进一步评价。     

清咽开胃含片润肠通便作用的药效学研究

目的观察清咽开胃含片的润肠通便作用.方法在复方地芬诺酯致小鼠肠蠕动抑制模型上观察其对小鼠小肠推进率、排黑便时间和6 h内排黑便的粒数及重量.结果经口给予小鼠清咽开胃含片0.8 g/kg和2.4 g/kg剂量,能显著提高肠蠕动抑制模型小鼠的小肠推进率(P＜0.05,P＜0.01),显著缩短便秘模型小鼠排首粒黑便时间,增加排黑便的粒数(P＜0.05,P＜0.01);2.4 g/kg剂量能显著增加便秘模型小鼠的排便重量(P＜0.05).结论清咽开胃含片有润肠通便作用.     

肺癌患者外周血T淋巴细胞亚群变化及其临床意义

[目的]检测肺癌患者T淋巴细胞亚群变化.[方法]采用SAP法检测42例肺癌患者及20例正常对照组的外周血T淋巴细胞亚群,并将肺癌中转移组和未转移组分别与正常对照组进行比较.[结果](1)肺癌转移组CD3 、CD 4阳性率低于未转移组(P＜0.05),CD 4/CD 8比值比正常组及未转移组低(P＜0.05).(2)未转移组CD 8低于正常组及转移组(P＜0.05).[结论]肺癌患者细胞免疫功能低下,并且细胞免疫功能随病情进展逐步受到抑制.