同种异体LAK细胞、rhIFN - αA和rhIL-2联合局部给药治疗大鼠乳腺癌

ogl言目前,中晚期乳腺癌的治疗尚无有效的方法,我们应用CHN系大鼠乳腺癌的动物模型,用LAK细胞、基因重组rhIFN－aA及rhIL－2联合局部给药,试图说明aA干扰素、rhIL－2及LAK细胞三者联合应用具有协同抗肿瘤作用,现报道如下．回材料和方法1．l动物采用CHN系大鼠,雌雄不拘,6Wb龄．实验动物随机分组．陕西省中医药研究院动物研究所提供．1．2大鼠自发性乳腺癌瘤细胞SMC－R－C－86＄株陕西省中医药研究院动物研究所提供．1．3药物rhlFN－aA,rhIL－2均系第四军医大学唐都医院生物技术中心研制．1．4LAK细胞的制备［‘’切取…     

高效液相色谱法测定消痰咳片的含量

目的采用反相色谱法同时测定消痰咳片中两种主要成分甲氧苄啶和磺胺林的含量.方法以乙腈0.1%H3PO4(1585)为流动相,检测波长254nm,HPLC法测定含量.结果试验表明,甲氧苄啶和磺胺林在0.8～8ug范围内呈良好的线性关系,回归方程分别为Y=-1127.1+110.2x(r=0.9994),Y=-1852.3+256.2x(r=0.9996),相对标准偏差分别为2.1%和0.8%.结论该方法简便、准确、可靠.     

复方虎杖喷雾剂的制备、质控和临床疗效

目的:本文为复方虎杖喷雾剂制定制备工艺和质控标准,并简单介绍本制剂疗效。方法:根据本制剂组方主要为黄柏、虎杖等中药,因此在质控标准中以对照品及标准药材为对照,建立黄柏、虎杖的薄层色谱检测方法的鉴别指标,又因本制剂为含醇溶剂,因此建立乙醇测定指标。结果:对不同批号3批的样品检测,证明所建立的质控标准切实可行。结论:复方虎杖喷雾剂制备工艺合理,质控方法简便可靠,疗效显著值得推广使用。     

磁性微球的磁响应性及狗肾动脉栓塞实验研究

研究了磁性明胶微球(MG-ms)的磁响应性及狗肾动脉栓塞效果。磁响应性实验表明,介质流速越慢,磁场强度越大,磁性微球中磁铁粒子含量越高,越容易定位磁性微球。狗肾动脉灌注10～30um磁性微球,血管造影和病理切片结果表明:磁性微球在外磁场作用下可以进一步栓塞至肾小球、肾脏的微细动脉,而且栓塞均匀、完全,而不加磁场时栓塞不完全。这些结果提示磁性明胶微球可以作为治疗肾癌的栓塞剂,将有利于增强化疗效果、减少毒副反应。     

鲜卑花酯的分离和结构

窄叶鲜卑花Sibiraea angustata(Rehd.)Hand.-Mazz.为蔷薇科植物,分布于青海、甘肃、四川和云南等省.生长在海拔3000～4000米的灌丛中或砂石滩上。甘肃民间用其枝叶治疗消化不良,胃痛等疾病,称之为柳茶。我们从其枝叶中已分离鉴定了六个三萜类化合物。本文继续报道从窄叶鲜卑花枝叶中分离鉴定的两个化合物,其中Ⅰ为新化合物,命名为鲜卑花酯(sibirate,Ⅰ)另一个是阿魏酸(ferulic acid,Ⅱ)。     

Intestinal and extra-intestinal tumor multiplicities in the Apc1638N mouse model after exposure to X-rays

Seven-week-old Apc1638N mice were exposed to a single dose of 5 Gy total-body X-irradiation resulting in a 8-fold increase in the number of intestinal tumors and a reduction of the lifespan to an average of 6 months. The distribution of tumors along the intestinal tract as well as the adenoma/carcinoma ratio, were similar between non-irradiated and irradiated animals. Semi-quantitative PCR analysis of intestinal-tumor DNA revealed that 10 out of 14 tumors had lost the wild-type Apc allele. However, in contrast to spontaneous Apc1638N intestinal tumors in which the LOH event at the Apc locus involves the entire chromosome 18 (1), in 6 out of 10 tumors derived from X-irradiated animals the Apc loss is associated with only a partial intrachromosomal deletion. The remaining tumors have lost all chromosome 18 markers tested. In addition to the intestinal tumors, female Apc1638N mice are susceptible to the development of mammary tumors. Upon X-irradiation, Apc1638N mice show a striking 15-fold increase in mammary tumors. Moreover, Apc1638N mice spontaneously develop other extra-intestinal neoplasia, such as desmoid-like lesions similar to those associated with familial adenomatous polyposis (FAP), the human syndrome caused by germline mutations in the APC gene. Spontaneous desmoid growth is sex-dependent, as male Apc1638N mice develop 3-fold more desmoids than female mice. Interestingly, X-irradiation seemed to increase the number of desmoids per animal nearly twofold only in female Apc1638N mice. Five out of 9 desmoids found in Apc1638N mice exposed to X-ray displayed loss of the wild-type Apc allele.      

Essential role for ras signaling in glioblastoma maintenance.

Malignant gliomas can be induced in mice through the combined expression of activated forms of beth KRas and Akt in glial progenitor cells. To determine the reliance of these tumors on continued KRas signaling in vivo, we generated a viral vector that allows the expression of KRas to be controlled post-delivery. Tumor-free survival rates were compared between those animals with continued KRas expression and animals in which KRas expression was suppressed. Kras signaling was found to be required for the maintenance of these tumors in vivo; inhibition of KRas expression resulted in apoptotic tumor regression and increased survival. Subsequent reexpression of KRas reinitiated tumor growth, indicating that a percentage of the progenitor cells survived and retained tumorigenic properties.     

Promotion of high school blood donations: testing the efficacy of a videotaped intervention

"Life to Life," an 11-minute videotape based on social learning principles, was used by 10 blood centers in presentations to 4970 high school students one week before school blood drives. At each school, some students saw the videotape and others attended a blood center's customary presentation. Students also completed a brief questionnaire assessing donation attitudes, donation history, and intent to donate. The videotape accounted for a relative increase of 18.7 percent in donations even when other factors were not controlled for. Results were analyzed with logistic models and showed a consistently positive effect over all models used. For students who had never donated, the estimated odds ratio for actual donation (videotape:control) was 1.528. When the model included both type of presentation and ethnicity, the relative increase in donation over that after the blood centers' usual presentation was 69.8 percent for first-time donors. Among previous donors considered alone, the effect on donation was not significant. Whatever their donor history, students who viewed the videotape showed significantly more positive attitudes toward donation and had greater intention to donate than students who saw the blood centers' standard presentations. These results suggest that this videotape is a useful tool for recruitment of high school blood donors.     

美托洛尔酒石酸盐胃内滞留漂浮型控释片的制备及药代动力学研究

本文根据水动力学平衡药物控释系统的设计原理制备了美托洛尔胃内滞留漂浮型控释片剂(简称M-HBS)。实验表明,本品的体外溶出符合一级动力学过程(K′r=0.1651 h^-1);贮存期为两年;人体胃内γ-闪烁照相结果表明,本品在胃内滞留时间(5～6 h)明显比普通片剂(1.0～1.5 h)长;体内动力学过程符合表观一级吸收与一级消除的单室模型;ⅳ美托洛尔体内为双室模型;体内数据经NONLIN计算机程序处理,求得各项参数:Ka=0.1944 h^-1,K=0.1867 h^-1,Vd=2.813,t_max=5.247 h,C_max=125.1 ng/ml。本品的体内外数据具有显著的相关性(P<0.01)。     

CASA as an aid to selecting sperm suspensions for artificial insemination in Callithrix jacchus

The ability to use sperm motility parameters, obtained by computer-assisted sperm motility analysis (CASA), as an aid to selecting sperm samples for artificial insemination (AI) would have considerable benefits for commercial organizations and for the captive breeding of endangered species. In this study the Hobson sperm tracker (HST) was validated for use with spermatozoa from Callithrix jacchus, the common marmoset, by comparing values for straight line velocity by CASA with those obtained by direct measurement of sperm tracks. Using the settings established during validation, ejaculated and epididymal spermatozoa were analysed with the HST. The range of values for velocity parameters were used to establish expected motility profiles for the two types of spermatozoa as follows: for epididymal spermatozoa (concentration 2.2 - 85.8 x 10(6) spermatozoa/mL) VCL 109.8-155.9, VSL 75.2-141.5, VAP 85.8-142.1, MAD 13.7-40.7, ALH 3.8-7.8, BCF 1.4-4.2, LIN 40.5-91.1% and STR 70.1-97.1%; for ejaculated spermatozoa (concentration 3.2-82.0 x 10(6) spermatozoa/mL) VCL 89.6-136.7, VSL 69.6-110.3, VAP 74.5-121.9, MAD 19.2-29.3, ALH 3.0-9.9, BCF 2.8-5.5., LIN 65.4-85.3% and STR 93.8-97.7%. Epididymal spermatozoa from males which were not sexually active had significantly lower values for VCL, VSL and VAP, while values for MAD were significantly higher than for spermatozoa from sexually active males (p < 0.031). Sperm concentration affected motility parameters significantly. Although motility parameters differed according to the batch of medium used, the differences were not statistically significant. Epididymal sperm samples had significantly higher VCL, VSL and VAP but lower BCF and LIN than ejaculated sperm samples of the same concentration diluted in the same batch of medium, while MAD, ALH and STR were not different. Urine contamination significantly reduced VCL, VSL and VAP (p < 0.008, < 0.016 and < 0.008, respectively, sample size = 7) whereas MAD, ALH, BCF, LIN and STR were not affected. Therefore CASA could be useful in screening ejaculates for use in Al to eliminate samples with unusual motility patterns.