Working conditions and health-related measures in the processing of waste products of phosphorus-containing mineral fertilizers]

In the processing of the waste products of phosphorus containing fertilizer production, several major health-related factors were identified depending on the industrial site's peculiarities: unfavourable microclimate conditions (both cold and heat), relative temperature differences, noise and vibration caused by the equipment, semi-product's, additives' and finished product's dusts, fluorine- and phosphorus-containing substances' affects and poor illumination. The proposed data were used for health-related improvements in the occupational conditions.     

磷酸钙作为佐剂应用在乙肝核酸疫苗中的可能性研究

目的：研究使用磷酸钙作为乙ＤＮＡ疫苗的佐剂,诱导机体免疫反应的可能性,方法：磷酸钙与疫苗ＤＮＡ制备出磷酸钙－ＤＮＡ共沉物,免疫小鼠,检测外周血抗体,观察免疫应答反应,结果：磷酸钙－ＤＮＡ共沉物能激发机体免疫应答反应。结论：佐剂在核酸疫苗的应用值得进一步研究。     

Origination of stromal precursor cells replenishing the population of these cells in heterotopic mouse bone marrow transplants after curettage in recipients

Curettage of bone marrow cavities of two bones (femoral and crural) in recipient mice causes a drastic (more than 7-fold) increase in the count of stromal precursor cells in heterotopic bone marrow transplants. Stromal colonies in cell cultures from these transplants consist of fibroblasts with an appreciable admixture of macrophages. All Y chromosome-typed colonies from cultures of female donor bone marrow transplants in recipient males (intact and subjected to curettage) contained cells carrying and not carrying Y chromosome. Quantitative results of Y chromosome typing of cells from colonies corresponded to the fibroblast/macrophage ratio in colonies and the predominant localization of the label corresponded to predominant localization of macrophages (at the periphery of colonies). The results indicate that the pool of bone marrow stromal precursor cells under conditions of increased demands originates from local sources, which confirms ample data on inability of these cells to migration. __________ Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 143, No. 5, pp. 568–567, May, 2007     

hTERT反义寡核苷酸促进紫杉醇诱导Hut78细胞凋亡

目的：探讨转染人端粒酶逆转录酶基因（hTERT)反义寡核苷酸后能否增强紫杉醇诱导皮肤T细胞淋巴瘤细胞株Hut78凋亡。方法:采用脂质体介导的基因转染技术将hTERT反义寡核苷酸（AODN)、正义寡核苷酸（SODN)导入Hut78细胞株中，应用端粒酶重复序列扩增及酶联免疫吸附方法（TRAP-PCR-ELISA)、逆转录-聚合酶链反应、四甲基偶氮唑蓝法（MTT)、台盼蓝拒染法和流式细胞仪分析测定联合应用紫杉醇后对细胞端粒酶活性、hTERT mRNA表达、细胞增殖及凋亡的影响。结果:转染hTERT基因反义寡核苷酸并联合应用紫杉醇，48 h后Hut78细胞增殖即被明显抑制，端粒酶活性下降，hTERT mRNA表达降低，分别同SODN联合紫杉醇组及单用紫杉醇组进行比较，有显著差异（P<0.05)； MTT结果显示，紫杉醇对AODN组、SODN组及空白对照组细胞的IC50值分别为(81.10 ± 1.68) nmol/L，(138.70±1.80) nmol/L和(139.40± 5.50) nmol/L，差异显著（P< 0.05)；经流式细胞仪检测，AODN联合紫杉醇组凋亡率明显高于SODN联合紫杉醇组和单用紫杉醇组。结论:hTERT反义寡核苷酸与紫杉醇有协同抗肿瘤效应，并能增加Hut78细胞对紫杉醇的敏感性，促进紫杉醇诱导Hut78细胞凋亡。     

生物运行骨材料与骨髓间充质干细胞体外的生物相容性

背景:生物衍生骨材料已在临床应用多年,但其作为组织工程骨支架材料的可行性还需验证.目的:评价异种生物衍生骨材料与骨髓间充质干细胞的生物相容性.设计、时间及地点:单一样本体外观察性实验,于2007-08/2008-01在中国辐射防护研究院医用组织库组织工程实验室完成.材料:山西省医用组织库生产的人松质骨;体外分离培养;周龄新西兰兔骨髓间充质干细胞.方法:经脱脂、脱钙、去抗原等步骤制各生物衍生骨材料,扫描电镜观察其表面超微结构.直接贴壁法分离培养兔骨髓间充质干细胞,MTT法和流式细胞仪检测生物衍生骨材料对骨髓间充质干细胞增殖及凋亡的影响.PKH26标记骨髓间充质干细胞与生物衍生骨材料复合培养,荧光显微镜动态观察细胞在骨材料上的生长情况;扫描电镜观察细胞在骨材料上的贴附、生长情况.主要观察指标:①生物衍生骨材料的形态结构及骨髓间充质干细胞在其上的生长、增殖情况.②生物衍生骨材料的细胞毒性.结果:所制各的生物衍生骨材料呈白色,扫描电镜观察呈规则的疏松多孔结构,孔隙间有微孔相互连通.其对骨髓间充质干细胞的增殖和凋亡无明显的影响;荧光显微镜下观察,在材料表面及孔隙内可见PKH26标记的细胞,显示红色荧光:扫描电镜观察可见细胞在材料上附着生长,细胞形态呈梭型或多角形,与材料贴附紧密.结论:实验制备的异种生物衍生骨材料细胞毒性低,与骨髓间充质干细胞具有良好的生物相容性.